Mercurial > repos > bcclaywell > argo_navis

annotate venv/lib/python2.7/site-packages/jinja2/compiler.py @ 0:d67268158946 draft

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planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
author bcclaywell
date Mon, 12 Oct 2015 17:43:33 -0400
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1 # -*- coding: utf-8 -*-
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2 """
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3 jinja2.compiler
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4 ~~~~~~~~~~~~~~~
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5
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6 Compiles nodes into python code.
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7
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8 :copyright: (c) 2010 by the Jinja Team.
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9 :license: BSD, see LICENSE for more details.
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10 """
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11 from itertools import chain
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12 from copy import deepcopy
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13 from keyword import iskeyword as is_python_keyword
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14 from jinja2 import nodes
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15 from jinja2.nodes import EvalContext
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16 from jinja2.visitor import NodeVisitor
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17 from jinja2.exceptions import TemplateAssertionError
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18 from jinja2.utils import Markup, concat, escape
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19 from jinja2._compat import range_type, text_type, string_types, \
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20 iteritems, NativeStringIO, imap
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21
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22
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23 operators = {
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24 'eq': '==',
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25 'ne': '!=',
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26 'gt': '>',
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27 'gteq': '>=',
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28 'lt': '<',
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29 'lteq': '<=',
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30 'in': 'in',
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31 'notin': 'not in'
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32 }
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33
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34 # what method to iterate over items do we want to use for dict iteration
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35 # in generated code? on 2.x let's go with iteritems, on 3.x with items
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36 if hasattr(dict, 'iteritems'):
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37 dict_item_iter = 'iteritems'
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38 else:
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39 dict_item_iter = 'items'
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40
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41
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42 # does if 0: dummy(x) get us x into the scope?
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43 def unoptimize_before_dead_code():
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44 x = 42
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45 def f():
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46 if 0: dummy(x)
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47 return f
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48
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49 # The getattr is necessary for pypy which does not set this attribute if
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50 # no closure is on the function
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51 unoptimize_before_dead_code = bool(
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52 getattr(unoptimize_before_dead_code(), '__closure__', None))
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53
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54
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55 def generate(node, environment, name, filename, stream=None,
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56 defer_init=False):
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57 """Generate the python source for a node tree."""
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58 if not isinstance(node, nodes.Template):
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59 raise TypeError('Can\'t compile non template nodes')
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60 generator = environment.code_generator_class(environment, name, filename,
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61 stream, defer_init)
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62 generator.visit(node)
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63 if stream is None:
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64 return generator.stream.getvalue()
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65
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66
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67 def has_safe_repr(value):
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68 """Does the node have a safe representation?"""
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69 if value is None or value is NotImplemented or value is Ellipsis:
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70 return True
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71 if isinstance(value, (bool, int, float, complex, range_type,
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72 Markup) + string_types):
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73 return True
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74 if isinstance(value, (tuple, list, set, frozenset)):
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75 for item in value:
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76 if not has_safe_repr(item):
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77 return False
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78 return True
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79 elif isinstance(value, dict):
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80 for key, value in iteritems(value):
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81 if not has_safe_repr(key):
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82 return False
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83 if not has_safe_repr(value):
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84 return False
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85 return True
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86 return False
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87
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88
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89 def find_undeclared(nodes, names):
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90 """Check if the names passed are accessed undeclared. The return value
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91 is a set of all the undeclared names from the sequence of names found.
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92 """
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93 visitor = UndeclaredNameVisitor(names)
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94 try:
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95 for node in nodes:
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96 visitor.visit(node)
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97 except VisitorExit:
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98 pass
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99 return visitor.undeclared
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100
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101
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102 class Identifiers(object):
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103 """Tracks the status of identifiers in frames."""
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104
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105 def __init__(self):
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106 # variables that are known to be declared (probably from outer
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107 # frames or because they are special for the frame)
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108 self.declared = set()
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109
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110 # undeclared variables from outer scopes
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111 self.outer_undeclared = set()
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112
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113 # names that are accessed without being explicitly declared by
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114 # this one or any of the outer scopes. Names can appear both in
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115 # declared and undeclared.
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116 self.undeclared = set()
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117
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118 # names that are declared locally
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119 self.declared_locally = set()
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120
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121 # names that are declared by parameters
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122 self.declared_parameter = set()
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123
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124 def add_special(self, name):
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125 """Register a special name like `loop`."""
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126 self.undeclared.discard(name)
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127 self.declared.add(name)
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128
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129 def is_declared(self, name):
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130 """Check if a name is declared in this or an outer scope."""
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131 if name in self.declared_locally or name in self.declared_parameter:
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132 return True
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133 return name in self.declared
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134
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135 def copy(self):
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136 return deepcopy(self)
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137
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138
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139 class Frame(object):
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140 """Holds compile time information for us."""
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141
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142 def __init__(self, eval_ctx, parent=None):
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143 self.eval_ctx = eval_ctx
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144 self.identifiers = Identifiers()
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145
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146 # a toplevel frame is the root + soft frames such as if conditions.
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147 self.toplevel = False
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148
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149 # the root frame is basically just the outermost frame, so no if
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150 # conditions. This information is used to optimize inheritance
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151 # situations.
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152 self.rootlevel = False
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153
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154 # in some dynamic inheritance situations the compiler needs to add
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155 # write tests around output statements.
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156 self.require_output_check = parent and parent.require_output_check
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157
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158 # inside some tags we are using a buffer rather than yield statements.
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159 # this for example affects {% filter %} or {% macro %}. If a frame
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160 # is buffered this variable points to the name of the list used as
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161 # buffer.
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162 self.buffer = None
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163
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164 # the name of the block we're in, otherwise None.
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165 self.block = parent and parent.block or None
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166
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167 # a set of actually assigned names
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168 self.assigned_names = set()
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169
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170 # the parent of this frame
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171 self.parent = parent
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172
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173 if parent is not None:
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174 self.identifiers.declared.update(
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175 parent.identifiers.declared |
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176 parent.identifiers.declared_parameter |
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177 parent.assigned_names
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178 )
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179 self.identifiers.outer_undeclared.update(
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180 parent.identifiers.undeclared -
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181 self.identifiers.declared
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182 )
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183 self.buffer = parent.buffer
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184
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185 def copy(self):
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186 """Create a copy of the current one."""
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187 rv = object.__new__(self.__class__)
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188 rv.__dict__.update(self.__dict__)
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189 rv.identifiers = object.__new__(self.identifiers.__class__)
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190 rv.identifiers.__dict__.update(self.identifiers.__dict__)
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191 return rv
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192
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193 def inspect(self, nodes):
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194 """Walk the node and check for identifiers. If the scope is hard (eg:
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195 enforce on a python level) overrides from outer scopes are tracked
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196 differently.
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197 """
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198 visitor = FrameIdentifierVisitor(self.identifiers)
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199 for node in nodes:
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200 visitor.visit(node)
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201
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202 def find_shadowed(self, extra=()):
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203 """Find all the shadowed names. extra is an iterable of variables
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204 that may be defined with `add_special` which may occour scoped.
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205 """
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206 i = self.identifiers
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207 return (i.declared | i.outer_undeclared) & \
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208 (i.declared_locally | i.declared_parameter) | \
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209 set(x for x in extra if i.is_declared(x))
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210
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211 def inner(self):
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212 """Return an inner frame."""
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213 return Frame(self.eval_ctx, self)
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214
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215 def soft(self):
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216 """Return a soft frame. A soft frame may not be modified as
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217 standalone thing as it shares the resources with the frame it
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218 was created of, but it's not a rootlevel frame any longer.
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219 """
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220 rv = self.copy()
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221 rv.rootlevel = False
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222 return rv
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223
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224 __copy__ = copy
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225
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226
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227 class VisitorExit(RuntimeError):
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228 """Exception used by the `UndeclaredNameVisitor` to signal a stop."""
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229
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230
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231 class DependencyFinderVisitor(NodeVisitor):
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232 """A visitor that collects filter and test calls."""
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233
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234 def __init__(self):
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235 self.filters = set()
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236 self.tests = set()
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237
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238 def visit_Filter(self, node):
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239 self.generic_visit(node)
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240 self.filters.add(node.name)
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241
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242 def visit_Test(self, node):
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243 self.generic_visit(node)
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244 self.tests.add(node.name)
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245
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246 def visit_Block(self, node):
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247 """Stop visiting at blocks."""
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248
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249
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250 class UndeclaredNameVisitor(NodeVisitor):
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251 """A visitor that checks if a name is accessed without being
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252 declared. This is different from the frame visitor as it will
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253 not stop at closure frames.
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254 """
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255
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256 def __init__(self, names):
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257 self.names = set(names)
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258 self.undeclared = set()
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259
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260 def visit_Name(self, node):
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261 if node.ctx == 'load' and node.name in self.names:
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262 self.undeclared.add(node.name)
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263 if self.undeclared == self.names:
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264 raise VisitorExit()
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265 else:
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266 self.names.discard(node.name)
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267
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268 def visit_Block(self, node):
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269 """Stop visiting a blocks."""
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270
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271
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272 class FrameIdentifierVisitor(NodeVisitor):
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273 """A visitor for `Frame.inspect`."""
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274
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275 def __init__(self, identifiers):
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276 self.identifiers = identifiers
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277
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278 def visit_Name(self, node):
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279 """All assignments to names go through this function."""
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280 if node.ctx == 'store':
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281 self.identifiers.declared_locally.add(node.name)
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282 elif node.ctx == 'param':
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283 self.identifiers.declared_parameter.add(node.name)
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284 elif node.ctx == 'load' and not \
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285 self.identifiers.is_declared(node.name):
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286 self.identifiers.undeclared.add(node.name)
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287
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288 def visit_If(self, node):
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289 self.visit(node.test)
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290 real_identifiers = self.identifiers
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291
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292 old_names = real_identifiers.declared_locally | \
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293 real_identifiers.declared_parameter
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294
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295 def inner_visit(nodes):
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296 if not nodes:
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297 return set()
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298 self.identifiers = real_identifiers.copy()
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299 for subnode in nodes:
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300 self.visit(subnode)
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301 rv = self.identifiers.declared_locally - old_names
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302 # we have to remember the undeclared variables of this branch
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303 # because we will have to pull them.
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304 real_identifiers.undeclared.update(self.identifiers.undeclared)
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305 self.identifiers = real_identifiers
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306 return rv
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307
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308 body = inner_visit(node.body)
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309 else_ = inner_visit(node.else_ or ())
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310
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311 # the differences between the two branches are also pulled as
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312 # undeclared variables
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313 real_identifiers.undeclared.update(body.symmetric_difference(else_) -
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314 real_identifiers.declared)
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315
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316 # remember those that are declared.
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317 real_identifiers.declared_locally.update(body | else_)
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318
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319 def visit_Macro(self, node):
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320 self.identifiers.declared_locally.add(node.name)
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321
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322 def visit_Import(self, node):
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323 self.generic_visit(node)
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324 self.identifiers.declared_locally.add(node.target)
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325
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326 def visit_FromImport(self, node):
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327 self.generic_visit(node)
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328 for name in node.names:
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329 if isinstance(name, tuple):
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330 self.identifiers.declared_locally.add(name[1])
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331 else:
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332 self.identifiers.declared_locally.add(name)
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333
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334 def visit_Assign(self, node):
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335 """Visit assignments in the correct order."""
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336 self.visit(node.node)
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337 self.visit(node.target)
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338
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339 def visit_For(self, node):
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340 """Visiting stops at for blocks. However the block sequence
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341 is visited as part of the outer scope.
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342 """
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343 self.visit(node.iter)
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344
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345 def visit_CallBlock(self, node):
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346 self.visit(node.call)
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347
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348 def visit_FilterBlock(self, node):
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349 self.visit(node.filter)
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350
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351 def visit_AssignBlock(self, node):
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352 """Stop visiting at block assigns."""
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353
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354 def visit_Scope(self, node):
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355 """Stop visiting at scopes."""
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356
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357 def visit_Block(self, node):
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358 """Stop visiting at blocks."""
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359
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360
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361 class CompilerExit(Exception):
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362 """Raised if the compiler encountered a situation where it just
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363 doesn't make sense to further process the code. Any block that
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364 raises such an exception is not further processed.
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365 """
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366
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367
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368 class CodeGenerator(NodeVisitor):
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369
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370 def __init__(self, environment, name, filename, stream=None,
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371 defer_init=False):
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372 if stream is None:
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373 stream = NativeStringIO()
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374 self.environment = environment
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375 self.name = name
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376 self.filename = filename
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377 self.stream = stream
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378 self.created_block_context = False
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379 self.defer_init = defer_init
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380
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381 # aliases for imports
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382 self.import_aliases = {}
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383
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384 # a registry for all blocks. Because blocks are moved out
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385 # into the global python scope they are registered here
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386 self.blocks = {}
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387
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388 # the number of extends statements so far
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389 self.extends_so_far = 0
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390
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391 # some templates have a rootlevel extends. In this case we
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392 # can safely assume that we're a child template and do some
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393 # more optimizations.
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394 self.has_known_extends = False
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395
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396 # the current line number
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397 self.code_lineno = 1
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398
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399 # registry of all filters and tests (global, not block local)
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400 self.tests = {}
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401 self.filters = {}
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402
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403 # the debug information
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404 self.debug_info = []
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405 self._write_debug_info = None
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406
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407 # the number of new lines before the next write()
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408 self._new_lines = 0
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409
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410 # the line number of the last written statement
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411 self._last_line = 0
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412
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413 # true if nothing was written so far.
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414 self._first_write = True
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415
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416 # used by the `temporary_identifier` method to get new
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417 # unique, temporary identifier
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418 self._last_identifier = 0
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419
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420 # the current indentation
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421 self._indentation = 0
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422
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423 # -- Various compilation helpers
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424
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425 def fail(self, msg, lineno):
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426 """Fail with a :exc:`TemplateAssertionError`."""
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427 raise TemplateAssertionError(msg, lineno, self.name, self.filename)
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428
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429 def temporary_identifier(self):
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430 """Get a new unique identifier."""
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431 self._last_identifier += 1
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432 return 't_%d' % self._last_identifier
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433
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434 def buffer(self, frame):
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435 """Enable buffering for the frame from that point onwards."""
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436 frame.buffer = self.temporary_identifier()
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437 self.writeline('%s = []' % frame.buffer)
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438
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439 def return_buffer_contents(self, frame):
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440 """Return the buffer contents of the frame."""
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441 if frame.eval_ctx.volatile:
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442 self.writeline('if context.eval_ctx.autoescape:')
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443 self.indent()
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444 self.writeline('return Markup(concat(%s))' % frame.buffer)
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445 self.outdent()
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446 self.writeline('else:')
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447 self.indent()
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448 self.writeline('return concat(%s)' % frame.buffer)
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449 self.outdent()
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450 elif frame.eval_ctx.autoescape:
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451 self.writeline('return Markup(concat(%s))' % frame.buffer)
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452 else:
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453 self.writeline('return concat(%s)' % frame.buffer)
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454
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455 def indent(self):
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456 """Indent by one."""
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457 self._indentation += 1
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458
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459 def outdent(self, step=1):
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460 """Outdent by step."""
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461 self._indentation -= step
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462
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463 def start_write(self, frame, node=None):
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464 """Yield or write into the frame buffer."""
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465 if frame.buffer is None:
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466 self.writeline('yield ', node)
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467 else:
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468 self.writeline('%s.append(' % frame.buffer, node)
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469
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470 def end_write(self, frame):
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471 """End the writing process started by `start_write`."""
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472 if frame.buffer is not None:
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473 self.write(')')
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474
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475 def simple_write(self, s, frame, node=None):
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476 """Simple shortcut for start_write + write + end_write."""
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477 self.start_write(frame, node)
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478 self.write(s)
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479 self.end_write(frame)
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480
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481 def blockvisit(self, nodes, frame):
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482 """Visit a list of nodes as block in a frame. If the current frame
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483 is no buffer a dummy ``if 0: yield None`` is written automatically
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484 unless the force_generator parameter is set to False.
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485 """
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486 if frame.buffer is None:
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487 self.writeline('if 0: yield None')
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488 else:
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489 self.writeline('pass')
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490 try:
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491 for node in nodes:
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492 self.visit(node, frame)
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493 except CompilerExit:
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494 pass
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495
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496 def write(self, x):
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497 """Write a string into the output stream."""
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498 if self._new_lines:
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499 if not self._first_write:
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500 self.stream.write('\n' * self._new_lines)
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501 self.code_lineno += self._new_lines
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502 if self._write_debug_info is not None:
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503 self.debug_info.append((self._write_debug_info,
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504 self.code_lineno))
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505 self._write_debug_info = None
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506 self._first_write = False
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507 self.stream.write(' ' * self._indentation)
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508 self._new_lines = 0
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509 self.stream.write(x)
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510
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511 def writeline(self, x, node=None, extra=0):
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512 """Combination of newline and write."""
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513 self.newline(node, extra)
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514 self.write(x)
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515
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516 def newline(self, node=None, extra=0):
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diff changeset
517 """Add one or more newlines before the next write."""
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518 self._new_lines = max(self._new_lines, 1 + extra)
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519 if node is not None and node.lineno != self._last_line:
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520 self._write_debug_info = node.lineno
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521 self._last_line = node.lineno
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522
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523 def signature(self, node, frame, extra_kwargs=None):
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524 """Writes a function call to the stream for the current node.
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525 A leading comma is added automatically. The extra keyword
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526 arguments may not include python keywords otherwise a syntax
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527 error could occour. The extra keyword arguments should be given
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528 as python dict.
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529 """
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530 # if any of the given keyword arguments is a python keyword
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531 # we have to make sure that no invalid call is created.
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532 kwarg_workaround = False
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533 for kwarg in chain((x.key for x in node.kwargs), extra_kwargs or ()):
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534 if is_python_keyword(kwarg):
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535 kwarg_workaround = True
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536 break
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537
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538 for arg in node.args:
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539 self.write(', ')
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540 self.visit(arg, frame)
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541
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542 if not kwarg_workaround:
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543 for kwarg in node.kwargs:
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544 self.write(', ')
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545 self.visit(kwarg, frame)
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546 if extra_kwargs is not None:
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547 for key, value in iteritems(extra_kwargs):
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548 self.write(', %s=%s' % (key, value))
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549 if node.dyn_args:
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550 self.write(', *')
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551 self.visit(node.dyn_args, frame)
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552
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553 if kwarg_workaround:
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554 if node.dyn_kwargs is not None:
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555 self.write(', **dict({')
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556 else:
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557 self.write(', **{')
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558 for kwarg in node.kwargs:
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559 self.write('%r: ' % kwarg.key)
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560 self.visit(kwarg.value, frame)
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561 self.write(', ')
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562 if extra_kwargs is not None:
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563 for key, value in iteritems(extra_kwargs):
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564 self.write('%r: %s, ' % (key, value))
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565 if node.dyn_kwargs is not None:
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566 self.write('}, **')
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567 self.visit(node.dyn_kwargs, frame)
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568 self.write(')')
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569 else:
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570 self.write('}')
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571
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572 elif node.dyn_kwargs is not None:
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573 self.write(', **')
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574 self.visit(node.dyn_kwargs, frame)
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575
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576 def pull_locals(self, frame):
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577 """Pull all the references identifiers into the local scope."""
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578 for name in frame.identifiers.undeclared:
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579 self.writeline('l_%s = context.resolve(%r)' % (name, name))
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580
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581 def pull_dependencies(self, nodes):
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582 """Pull all the dependencies."""
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583 visitor = DependencyFinderVisitor()
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584 for node in nodes:
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585 visitor.visit(node)
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586 for dependency in 'filters', 'tests':
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587 mapping = getattr(self, dependency)
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588 for name in getattr(visitor, dependency):
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589 if name not in mapping:
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590 mapping[name] = self.temporary_identifier()
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591 self.writeline('%s = environment.%s[%r]' %
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592 (mapping[name], dependency, name))
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593
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594 def unoptimize_scope(self, frame):
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595 """Disable Python optimizations for the frame."""
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596 # XXX: this is not that nice but it has no real overhead. It
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597 # mainly works because python finds the locals before dead code
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598 # is removed. If that breaks we have to add a dummy function
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599 # that just accepts the arguments and does nothing.
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600 if frame.identifiers.declared:
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parents:
diff changeset
601 self.writeline('%sdummy(%s)' % (
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602 unoptimize_before_dead_code and 'if 0: ' or '',
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603 ', '.join('l_' + name for name in frame.identifiers.declared)
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604 ))
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605
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606 def push_scope(self, frame, extra_vars=()):
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607 """This function returns all the shadowed variables in a dict
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parents:
diff changeset
608 in the form name: alias and will write the required assignments
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parents:
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609 into the current scope. No indentation takes place.
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610
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611 This also predefines locally declared variables from the loop
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612 body because under some circumstances it may be the case that
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613
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614 `extra_vars` is passed to `Frame.find_shadowed`.
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615 """
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616 aliases = {}
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617 for name in frame.find_shadowed(extra_vars):
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618 aliases[name] = ident = self.temporary_identifier()
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619 self.writeline('%s = l_%s' % (ident, name))
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620 to_declare = set()
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621 for name in frame.identifiers.declared_locally:
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622 if name not in aliases:
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623 to_declare.add('l_' + name)
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624 if to_declare:
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625 self.writeline(' = '.join(to_declare) + ' = missing')
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626 return aliases
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627
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628 def pop_scope(self, aliases, frame):
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629 """Restore all aliases and delete unused variables."""
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630 for name, alias in iteritems(aliases):
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631 self.writeline('l_%s = %s' % (name, alias))
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632 to_delete = set()
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633 for name in frame.identifiers.declared_locally:
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634 if name not in aliases:
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635 to_delete.add('l_' + name)
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636 if to_delete:
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637 # we cannot use the del statement here because enclosed
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638 # scopes can trigger a SyntaxError:
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639 # a = 42; b = lambda: a; del a
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640 self.writeline(' = '.join(to_delete) + ' = missing')
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641
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642 def function_scoping(self, node, frame, children=None,
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643 find_special=True):
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644 """In Jinja a few statements require the help of anonymous
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645 functions. Those are currently macros and call blocks and in
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646 the future also recursive loops. As there is currently
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647 technical limitation that doesn't allow reading and writing a
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648 variable in a scope where the initial value is coming from an
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649 outer scope, this function tries to fall back with a common
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650 error message. Additionally the frame passed is modified so
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651 that the argumetns are collected and callers are looked up.
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652
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653 This will return the modified frame.
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654 """
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655 # we have to iterate twice over it, make sure that works
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656 if children is None:
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657 children = node.iter_child_nodes()
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658 children = list(children)
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659 func_frame = frame.inner()
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660 func_frame.inspect(children)
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661
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662 # variables that are undeclared (accessed before declaration) and
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663 # declared locally *and* part of an outside scope raise a template
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664 # assertion error. Reason: we can't generate reasonable code from
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665 # it without aliasing all the variables.
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666 # this could be fixed in Python 3 where we have the nonlocal
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667 # keyword or if we switch to bytecode generation
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668 overridden_closure_vars = (
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669 func_frame.identifiers.undeclared &
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670 func_frame.identifiers.declared &
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671 (func_frame.identifiers.declared_locally |
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672 func_frame.identifiers.declared_parameter)
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673 )
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674 if overridden_closure_vars:
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675 self.fail('It\'s not possible to set and access variables '
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676 'derived from an outer scope! (affects: %s)' %
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677 ', '.join(sorted(overridden_closure_vars)), node.lineno)
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678
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679 # remove variables from a closure from the frame's undeclared
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680 # identifiers.
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681 func_frame.identifiers.undeclared -= (
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682 func_frame.identifiers.undeclared &
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683 func_frame.identifiers.declared
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684 )
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685
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686 # no special variables for this scope, abort early
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687 if not find_special:
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688 return func_frame
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689
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690 func_frame.accesses_kwargs = False
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691 func_frame.accesses_varargs = False
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692 func_frame.accesses_caller = False
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693 func_frame.arguments = args = ['l_' + x.name for x in node.args]
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694
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695 undeclared = find_undeclared(children, ('caller', 'kwargs', 'varargs'))
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696
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697 if 'caller' in undeclared:
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698 func_frame.accesses_caller = True
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699 func_frame.identifiers.add_special('caller')
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700 args.append('l_caller')
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701 if 'kwargs' in undeclared:
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702 func_frame.accesses_kwargs = True
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703 func_frame.identifiers.add_special('kwargs')
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704 args.append('l_kwargs')
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705 if 'varargs' in undeclared:
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706 func_frame.accesses_varargs = True
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707 func_frame.identifiers.add_special('varargs')
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708 args.append('l_varargs')
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709 return func_frame
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710
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711 def macro_body(self, node, frame, children=None):
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712 """Dump the function def of a macro or call block."""
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713 frame = self.function_scoping(node, frame, children)
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714 # macros are delayed, they never require output checks
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715 frame.require_output_check = False
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716 args = frame.arguments
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717 # XXX: this is an ugly fix for the loop nesting bug
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718 # (tests.test_old_bugs.test_loop_call_bug). This works around
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719 # a identifier nesting problem we have in general. It's just more
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720 # likely to happen in loops which is why we work around it. The
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721 # real solution would be "nonlocal" all the identifiers that are
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722 # leaking into a new python frame and might be used both unassigned
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723 # and assigned.
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724 if 'loop' in frame.identifiers.declared:
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725 args = args + ['l_loop=l_loop']
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726 self.writeline('def macro(%s):' % ', '.join(args), node)
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727 self.indent()
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728 self.buffer(frame)
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729 self.pull_locals(frame)
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730 self.blockvisit(node.body, frame)
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731 self.return_buffer_contents(frame)
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732 self.outdent()
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733 return frame
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734
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735 def macro_def(self, node, frame):
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736 """Dump the macro definition for the def created by macro_body."""
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737 arg_tuple = ', '.join(repr(x.name) for x in node.args)
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738 name = getattr(node, 'name', None)
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739 if len(node.args) == 1:
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740 arg_tuple += ','
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741 self.write('Macro(environment, macro, %r, (%s), (' %
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742 (name, arg_tuple))
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743 for arg in node.defaults:
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744 self.visit(arg, frame)
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745 self.write(', ')
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746 self.write('), %r, %r, %r)' % (
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747 bool(frame.accesses_kwargs),
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748 bool(frame.accesses_varargs),
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749 bool(frame.accesses_caller)
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750 ))
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751
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752 def position(self, node):
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753 """Return a human readable position for the node."""
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754 rv = 'line %d' % node.lineno
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755 if self.name is not None:
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756 rv += ' in ' + repr(self.name)
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757 return rv
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758
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759 # -- Statement Visitors
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760
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761 def visit_Template(self, node, frame=None):
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762 assert frame is None, 'no root frame allowed'
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763 eval_ctx = EvalContext(self.environment, self.name)
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764
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bcclaywell
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765 from jinja2.runtime import __all__ as exported
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766 self.writeline('from __future__ import division')
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parents:
diff changeset
767 self.writeline('from jinja2.runtime import ' + ', '.join(exported))
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768 if not unoptimize_before_dead_code:
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769 self.writeline('dummy = lambda *x: None')
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770
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771 # if we want a deferred initialization we cannot move the
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772 # environment into a local name
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773 envenv = not self.defer_init and ', environment=environment' or ''
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774
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775 # do we have an extends tag at all? If not, we can save some
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bcclaywell
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776 # overhead by just not processing any inheritance code.
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777 have_extends = node.find(nodes.Extends) is not None
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778
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parents:
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779 # find all blocks
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780 for block in node.find_all(nodes.Block):
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781 if block.name in self.blocks:
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782 self.fail('block %r defined twice' % block.name, block.lineno)
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783 self.blocks[block.name] = block
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784
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785 # find all imports and import them
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786 for import_ in node.find_all(nodes.ImportedName):
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787 if import_.importname not in self.import_aliases:
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788 imp = import_.importname
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789 self.import_aliases[imp] = alias = self.temporary_identifier()
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790 if '.' in imp:
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791 module, obj = imp.rsplit('.', 1)
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792 self.writeline('from %s import %s as %s' %
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793 (module, obj, alias))
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794 else:
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795 self.writeline('import %s as %s' % (imp, alias))
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796
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797 # add the load name
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798 self.writeline('name = %r' % self.name)
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799
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800 # generate the root render function.
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801 self.writeline('def root(context%s):' % envenv, extra=1)
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802
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803 # process the root
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804 frame = Frame(eval_ctx)
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805 frame.inspect(node.body)
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806 frame.toplevel = frame.rootlevel = True
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807 frame.require_output_check = have_extends and not self.has_known_extends
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808 self.indent()
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809 if have_extends:
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810 self.writeline('parent_template = None')
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811 if 'self' in find_undeclared(node.body, ('self',)):
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812 frame.identifiers.add_special('self')
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813 self.writeline('l_self = TemplateReference(context)')
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814 self.pull_locals(frame)
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815 self.pull_dependencies(node.body)
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816 self.blockvisit(node.body, frame)
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817 self.outdent()
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818
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819 # make sure that the parent root is called.
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820 if have_extends:
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821 if not self.has_known_extends:
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822 self.indent()
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823 self.writeline('if parent_template is not None:')
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824 self.indent()
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825 self.writeline('for event in parent_template.'
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826 'root_render_func(context):')
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827 self.indent()
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828 self.writeline('yield event')
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829 self.outdent(2 + (not self.has_known_extends))
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830
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831 # at this point we now have the blocks collected and can visit them too.
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832 for name, block in iteritems(self.blocks):
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833 block_frame = Frame(eval_ctx)
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834 block_frame.inspect(block.body)
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835 block_frame.block = name
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836 self.writeline('def block_%s(context%s):' % (name, envenv),
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837 block, 1)
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838 self.indent()
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839 undeclared = find_undeclared(block.body, ('self', 'super'))
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840 if 'self' in undeclared:
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841 block_frame.identifiers.add_special('self')
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842 self.writeline('l_self = TemplateReference(context)')
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843 if 'super' in undeclared:
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844 block_frame.identifiers.add_special('super')
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845 self.writeline('l_super = context.super(%r, '
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846 'block_%s)' % (name, name))
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847 self.pull_locals(block_frame)
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848 self.pull_dependencies(block.body)
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849 self.blockvisit(block.body, block_frame)
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850 self.outdent()
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851
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852 self.writeline('blocks = {%s}' % ', '.join('%r: block_%s' % (x, x)
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853 for x in self.blocks),
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854 extra=1)
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855
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856 # add a function that returns the debug info
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857 self.writeline('debug_info = %r' % '&'.join('%s=%s' % x for x
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858 in self.debug_info))
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859
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860 def visit_Block(self, node, frame):
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861 """Call a block and register it for the template."""
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862 level = 1
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863 if frame.toplevel:
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864 # if we know that we are a child template, there is no need to
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865 # check if we are one
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866 if self.has_known_extends:
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867 return
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868 if self.extends_so_far > 0:
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869 self.writeline('if parent_template is None:')
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870 self.indent()
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871 level += 1
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872 context = node.scoped and 'context.derived(locals())' or 'context'
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873 self.writeline('for event in context.blocks[%r][0](%s):' % (
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874 node.name, context), node)
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875 self.indent()
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876 self.simple_write('event', frame)
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877 self.outdent(level)
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878
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879 def visit_Extends(self, node, frame):
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880 """Calls the extender."""
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881 if not frame.toplevel:
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882 self.fail('cannot use extend from a non top-level scope',
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883 node.lineno)
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884
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885 # if the number of extends statements in general is zero so
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886 # far, we don't have to add a check if something extended
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887 # the template before this one.
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parents:
diff changeset
888 if self.extends_so_far > 0:
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diff changeset
889
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parents:
diff changeset
890 # if we have a known extends we just add a template runtime
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parents:
diff changeset
891 # error into the generated code. We could catch that at compile
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parents:
diff changeset
892 # time too, but i welcome it not to confuse users by throwing the
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
893 # same error at different times just "because we can".
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parents:
diff changeset
894 if not self.has_known_extends:
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parents:
diff changeset
895 self.writeline('if parent_template is not None:')
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diff changeset
896 self.indent()
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diff changeset
897 self.writeline('raise TemplateRuntimeError(%r)' %
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parents:
diff changeset
898 'extended multiple times')
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diff changeset
899
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900 # if we have a known extends already we don't need that code here
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parents:
diff changeset
901 # as we know that the template execution will end here.
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parents:
diff changeset
902 if self.has_known_extends:
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parents:
diff changeset
903 raise CompilerExit()
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904 else:
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diff changeset
905 self.outdent()
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diff changeset
906
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907 self.writeline('parent_template = environment.get_template(', node)
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diff changeset
908 self.visit(node.template, frame)
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diff changeset
909 self.write(', %r)' % self.name)
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parents:
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910 self.writeline('for name, parent_block in parent_template.'
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diff changeset
911 'blocks.%s():' % dict_item_iter)
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912 self.indent()
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parents:
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913 self.writeline('context.blocks.setdefault(name, []).'
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parents:
diff changeset
914 'append(parent_block)')
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915 self.outdent()
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916
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917 # if this extends statement was in the root level we can take
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parents:
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918 # advantage of that information and simplify the generated code
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parents:
diff changeset
919 # in the top level from this point onwards
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920 if frame.rootlevel:
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921 self.has_known_extends = True
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922
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parents:
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923 # and now we have one more
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924 self.extends_so_far += 1
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parents:
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925
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926 def visit_Include(self, node, frame):
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parents:
diff changeset
927 """Handles includes."""
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928 if node.with_context:
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929 self.unoptimize_scope(frame)
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930 if node.ignore_missing:
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931 self.writeline('try:')
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932 self.indent()
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933
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934 func_name = 'get_or_select_template'
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parents:
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935 if isinstance(node.template, nodes.Const):
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parents:
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936 if isinstance(node.template.value, string_types):
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parents:
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937 func_name = 'get_template'
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parents:
diff changeset
938 elif isinstance(node.template.value, (tuple, list)):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
939 func_name = 'select_template'
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parents:
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940 elif isinstance(node.template, (nodes.Tuple, nodes.List)):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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941 func_name = 'select_template'
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parents:
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942
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943 self.writeline('template = environment.%s(' % func_name, node)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
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944 self.visit(node.template, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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945 self.write(', %r)' % self.name)
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parents:
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946 if node.ignore_missing:
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parents:
diff changeset
947 self.outdent()
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diff changeset
948 self.writeline('except TemplateNotFound:')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
949 self.indent()
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diff changeset
950 self.writeline('pass')
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diff changeset
951 self.outdent()
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diff changeset
952 self.writeline('else:')
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diff changeset
953 self.indent()
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parents:
diff changeset
954
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955 if node.with_context:
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diff changeset
956 self.writeline('for event in template.root_render_func('
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
957 'template.new_context(context.parent, True, '
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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diff changeset
958 'locals())):')
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diff changeset
959 else:
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960 self.writeline('for event in template.module._body_stream:')
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parents:
diff changeset
961
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parents:
diff changeset
962 self.indent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
963 self.simple_write('event', frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
964 self.outdent()
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bcclaywell
parents:
diff changeset
965
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parents:
diff changeset
966 if node.ignore_missing:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
967 self.outdent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
968
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
969 def visit_Import(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
970 """Visit regular imports."""
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
971 if node.with_context:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
972 self.unoptimize_scope(frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
973 self.writeline('l_%s = ' % node.target, node)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
974 if frame.toplevel:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
975 self.write('context.vars[%r] = ' % node.target)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
976 self.write('environment.get_template(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
977 self.visit(node.template, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
978 self.write(', %r).' % self.name)
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parents:
diff changeset
979 if node.with_context:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
980 self.write('make_module(context.parent, True, locals())')
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parents:
diff changeset
981 else:
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parents:
diff changeset
982 self.write('module')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
983 if frame.toplevel and not node.target.startswith('_'):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
984 self.writeline('context.exported_vars.discard(%r)' % node.target)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
985 frame.assigned_names.add(node.target)
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parents:
diff changeset
986
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
987 def visit_FromImport(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
988 """Visit named imports."""
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
989 self.newline(node)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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diff changeset
990 self.write('included_template = environment.get_template(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
991 self.visit(node.template, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
992 self.write(', %r).' % self.name)
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parents:
diff changeset
993 if node.with_context:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
994 self.write('make_module(context.parent, True)')
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parents:
diff changeset
995 else:
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parents:
diff changeset
996 self.write('module')
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parents:
diff changeset
997
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parents:
diff changeset
998 var_names = []
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
999 discarded_names = []
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1000 for name in node.names:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1001 if isinstance(name, tuple):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1002 name, alias = name
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1003 else:
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parents:
diff changeset
1004 alias = name
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1005 self.writeline('l_%s = getattr(included_template, '
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1006 '%r, missing)' % (alias, name))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1007 self.writeline('if l_%s is missing:' % alias)
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parents:
diff changeset
1008 self.indent()
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parents:
diff changeset
1009 self.writeline('l_%s = environment.undefined(%r %% '
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1010 'included_template.__name__, '
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1011 'name=%r)' %
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1012 (alias, 'the template %%r (imported on %s) does '
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
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parents:
diff changeset
1013 'not export the requested name %s' % (
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1014 self.position(node),
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1015 repr(name)
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1016 ), name))
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1017 self.outdent()
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1018 if frame.toplevel:
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1019 var_names.append(alias)
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1020 if not alias.startswith('_'):
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1021 discarded_names.append(alias)
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1022 frame.assigned_names.add(alias)
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1023
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1024 if var_names:
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1025 if len(var_names) == 1:
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1026 name = var_names[0]
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1027 self.writeline('context.vars[%r] = l_%s' % (name, name))
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1028 else:
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1029 self.writeline('context.vars.update({%s})' % ', '.join(
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1030 '%r: l_%s' % (name, name) for name in var_names
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1031 ))
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1032 if discarded_names:
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1033 if len(discarded_names) == 1:
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1034 self.writeline('context.exported_vars.discard(%r)' %
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1035 discarded_names[0])
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1036 else:
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1037 self.writeline('context.exported_vars.difference_'
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1038 'update((%s))' % ', '.join(imap(repr, discarded_names)))
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1039
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1040 def visit_For(self, node, frame):
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1041 # when calculating the nodes for the inner frame we have to exclude
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1042 # the iterator contents from it
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1043 children = node.iter_child_nodes(exclude=('iter',))
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1044 if node.recursive:
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1045 loop_frame = self.function_scoping(node, frame, children,
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1046 find_special=False)
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1047 else:
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1048 loop_frame = frame.inner()
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1049 loop_frame.inspect(children)
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1050
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1051 # try to figure out if we have an extended loop. An extended loop
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1052 # is necessary if the loop is in recursive mode if the special loop
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1053 # variable is accessed in the body.
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1054 extended_loop = node.recursive or 'loop' in \
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1055 find_undeclared(node.iter_child_nodes(
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1056 only=('body',)), ('loop',))
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1057
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1058 # if we don't have an recursive loop we have to find the shadowed
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1059 # variables at that point. Because loops can be nested but the loop
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1060 # variable is a special one we have to enforce aliasing for it.
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1061 if not node.recursive:
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1062 aliases = self.push_scope(loop_frame, ('loop',))
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1063
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1064 # otherwise we set up a buffer and add a function def
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1065 else:
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1066 self.writeline('def loop(reciter, loop_render_func, depth=0):', node)
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1067 self.indent()
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1068 self.buffer(loop_frame)
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1069 aliases = {}
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1070
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1071 # make sure the loop variable is a special one and raise a template
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1072 # assertion error if a loop tries to write to loop
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1073 if extended_loop:
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1074 self.writeline('l_loop = missing')
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1075 loop_frame.identifiers.add_special('loop')
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1076 for name in node.find_all(nodes.Name):
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1077 if name.ctx == 'store' and name.name == 'loop':
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1078 self.fail('Can\'t assign to special loop variable '
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1079 'in for-loop target', name.lineno)
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1080
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1081 self.pull_locals(loop_frame)
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1082 if node.else_:
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1083 iteration_indicator = self.temporary_identifier()
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1084 self.writeline('%s = 1' % iteration_indicator)
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1085
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1086 # Create a fake parent loop if the else or test section of a
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1087 # loop is accessing the special loop variable and no parent loop
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1088 # exists.
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1089 if 'loop' not in aliases and 'loop' in find_undeclared(
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1090 node.iter_child_nodes(only=('else_', 'test')), ('loop',)):
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1091 self.writeline("l_loop = environment.undefined(%r, name='loop')" %
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1092 ("'loop' is undefined. the filter section of a loop as well "
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1093 "as the else block don't have access to the special 'loop'"
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1094 " variable of the current loop. Because there is no parent "
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1095 "loop it's undefined. Happened in loop on %s" %
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1096 self.position(node)))
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1097
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1098 self.writeline('for ', node)
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1099 self.visit(node.target, loop_frame)
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1100 self.write(extended_loop and ', l_loop in LoopContext(' or ' in ')
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1101
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1102 # if we have an extened loop and a node test, we filter in the
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1103 # "outer frame".
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1104 if extended_loop and node.test is not None:
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1105 self.write('(')
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1106 self.visit(node.target, loop_frame)
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1107 self.write(' for ')
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1108 self.visit(node.target, loop_frame)
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1109 self.write(' in ')
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1110 if node.recursive:
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1111 self.write('reciter')
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1112 else:
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1113 self.visit(node.iter, loop_frame)
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1114 self.write(' if (')
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1115 test_frame = loop_frame.copy()
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1116 self.visit(node.test, test_frame)
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1117 self.write('))')
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1118
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1119 elif node.recursive:
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1120 self.write('reciter')
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1121 else:
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1122 self.visit(node.iter, loop_frame)
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1123
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1124 if node.recursive:
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1125 self.write(', loop_render_func, depth):')
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1126 else:
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1127 self.write(extended_loop and '):' or ':')
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1128
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1129 # tests in not extended loops become a continue
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1130 if not extended_loop and node.test is not None:
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1131 self.indent()
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1132 self.writeline('if not ')
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1133 self.visit(node.test, loop_frame)
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1134 self.write(':')
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1135 self.indent()
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1136 self.writeline('continue')
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parents:
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1137 self.outdent(2)
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1138
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1139 self.indent()
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parents:
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1140 self.blockvisit(node.body, loop_frame)
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1141 if node.else_:
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1142 self.writeline('%s = 0' % iteration_indicator)
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parents:
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1143 self.outdent()
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parents:
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1144
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1145 if node.else_:
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parents:
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1146 self.writeline('if %s:' % iteration_indicator)
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1147 self.indent()
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parents:
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1148 self.blockvisit(node.else_, loop_frame)
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parents:
diff changeset
1149 self.outdent()
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parents:
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1150
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1151 # reset the aliases if there are any.
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1152 if not node.recursive:
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1153 self.pop_scope(aliases, loop_frame)
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1154
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parents:
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1155 # if the node was recursive we have to return the buffer contents
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parents:
diff changeset
1156 # and start the iteration code
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1157 if node.recursive:
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1158 self.return_buffer_contents(loop_frame)
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parents:
diff changeset
1159 self.outdent()
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parents:
diff changeset
1160 self.start_write(frame, node)
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parents:
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1161 self.write('loop(')
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parents:
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1162 self.visit(node.iter, frame)
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1163 self.write(', loop)')
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1164 self.end_write(frame)
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1165
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1166 def visit_If(self, node, frame):
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parents:
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1167 if_frame = frame.soft()
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parents:
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1168 self.writeline('if ', node)
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1169 self.visit(node.test, if_frame)
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1170 self.write(':')
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1171 self.indent()
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1172 self.blockvisit(node.body, if_frame)
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1173 self.outdent()
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1174 if node.else_:
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1175 self.writeline('else:')
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1176 self.indent()
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1177 self.blockvisit(node.else_, if_frame)
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1178 self.outdent()
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1179
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1180 def visit_Macro(self, node, frame):
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parents:
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1181 macro_frame = self.macro_body(node, frame)
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1182 self.newline()
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1183 if frame.toplevel:
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1184 if not node.name.startswith('_'):
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parents:
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1185 self.write('context.exported_vars.add(%r)' % node.name)
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parents:
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1186 self.writeline('context.vars[%r] = ' % node.name)
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1187 self.write('l_%s = ' % node.name)
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1188 self.macro_def(node, macro_frame)
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1189 frame.assigned_names.add(node.name)
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1190
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1191 def visit_CallBlock(self, node, frame):
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1192 children = node.iter_child_nodes(exclude=('call',))
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parents:
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1193 call_frame = self.macro_body(node, frame, children)
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parents:
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1194 self.writeline('caller = ')
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parents:
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1195 self.macro_def(node, call_frame)
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parents:
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1196 self.start_write(frame, node)
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parents:
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1197 self.visit_Call(node.call, call_frame, forward_caller=True)
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parents:
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1198 self.end_write(frame)
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1199
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1200 def visit_FilterBlock(self, node, frame):
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1201 filter_frame = frame.inner()
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parents:
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1202 filter_frame.inspect(node.iter_child_nodes())
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1203 aliases = self.push_scope(filter_frame)
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parents:
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1204 self.pull_locals(filter_frame)
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parents:
diff changeset
1205 self.buffer(filter_frame)
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parents:
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1206 self.blockvisit(node.body, filter_frame)
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parents:
diff changeset
1207 self.start_write(frame, node)
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parents:
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1208 self.visit_Filter(node.filter, filter_frame)
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parents:
diff changeset
1209 self.end_write(frame)
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parents:
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1210 self.pop_scope(aliases, filter_frame)
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parents:
diff changeset
1211
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parents:
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1212 def visit_ExprStmt(self, node, frame):
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parents:
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1213 self.newline(node)
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parents:
diff changeset
1214 self.visit(node.node, frame)
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parents:
diff changeset
1215
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parents:
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1216 def visit_Output(self, node, frame):
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bcclaywell
parents:
diff changeset
1217 # if we have a known extends statement, we don't output anything
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parents:
diff changeset
1218 # if we are in a require_output_check section
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parents:
diff changeset
1219 if self.has_known_extends and frame.require_output_check:
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bcclaywell
parents:
diff changeset
1220 return
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bcclaywell
parents:
diff changeset
1221
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parents:
diff changeset
1222 allow_constant_finalize = True
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parents:
diff changeset
1223 if self.environment.finalize:
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bcclaywell
parents:
diff changeset
1224 func = self.environment.finalize
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parents:
diff changeset
1225 if getattr(func, 'contextfunction', False) or \
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bcclaywell
parents:
diff changeset
1226 getattr(func, 'evalcontextfunction', False):
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bcclaywell
parents:
diff changeset
1227 allow_constant_finalize = False
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parents:
diff changeset
1228 elif getattr(func, 'environmentfunction', False):
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bcclaywell
parents:
diff changeset
1229 finalize = lambda x: text_type(
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bcclaywell
parents:
diff changeset
1230 self.environment.finalize(self.environment, x))
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bcclaywell
parents:
diff changeset
1231 else:
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bcclaywell
parents:
diff changeset
1232 finalize = lambda x: text_type(self.environment.finalize(x))
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bcclaywell
parents:
diff changeset
1233 else:
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bcclaywell
parents:
diff changeset
1234 finalize = text_type
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bcclaywell
parents:
diff changeset
1235
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bcclaywell
parents:
diff changeset
1236 # if we are inside a frame that requires output checking, we do so
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bcclaywell
parents:
diff changeset
1237 outdent_later = False
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parents:
diff changeset
1238 if frame.require_output_check:
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bcclaywell
parents:
diff changeset
1239 self.writeline('if parent_template is None:')
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bcclaywell
parents:
diff changeset
1240 self.indent()
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bcclaywell
parents:
diff changeset
1241 outdent_later = True
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bcclaywell
parents:
diff changeset
1242
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bcclaywell
parents:
diff changeset
1243 # try to evaluate as many chunks as possible into a static
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bcclaywell
parents:
diff changeset
1244 # string at compile time.
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bcclaywell
parents:
diff changeset
1245 body = []
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bcclaywell
parents:
diff changeset
1246 for child in node.nodes:
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bcclaywell
parents:
diff changeset
1247 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1248 if not allow_constant_finalize:
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bcclaywell
parents:
diff changeset
1249 raise nodes.Impossible()
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bcclaywell
parents:
diff changeset
1250 const = child.as_const(frame.eval_ctx)
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bcclaywell
parents:
diff changeset
1251 except nodes.Impossible:
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bcclaywell
parents:
diff changeset
1252 body.append(child)
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bcclaywell
parents:
diff changeset
1253 continue
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bcclaywell
parents:
diff changeset
1254 # the frame can't be volatile here, becaus otherwise the
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bcclaywell
parents:
diff changeset
1255 # as_const() function would raise an Impossible exception
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bcclaywell
parents:
diff changeset
1256 # at that point.
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bcclaywell
parents:
diff changeset
1257 try:
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bcclaywell
parents:
diff changeset
1258 if frame.eval_ctx.autoescape:
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bcclaywell
parents:
diff changeset
1259 if hasattr(const, '__html__'):
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bcclaywell
parents:
diff changeset
1260 const = const.__html__()
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bcclaywell
parents:
diff changeset
1261 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1262 const = escape(const)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1263 const = finalize(const)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1264 except Exception:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1265 # if something goes wrong here we evaluate the node
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1266 # at runtime for easier debugging
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1267 body.append(child)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1268 continue
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1269 if body and isinstance(body[-1], list):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1270 body[-1].append(const)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1271 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1272 body.append([const])
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1273
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1274 # if we have less than 3 nodes or a buffer we yield or extend/append
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1275 if len(body) < 3 or frame.buffer is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1276 if frame.buffer is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1277 # for one item we append, for more we extend
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1278 if len(body) == 1:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1279 self.writeline('%s.append(' % frame.buffer)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1280 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1281 self.writeline('%s.extend((' % frame.buffer)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1282 self.indent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1283 for item in body:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1284 if isinstance(item, list):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1285 val = repr(concat(item))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1286 if frame.buffer is None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1287 self.writeline('yield ' + val)
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bcclaywell
parents:
diff changeset
1288 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1289 self.writeline(val + ', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1290 else:
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bcclaywell
parents:
diff changeset
1291 if frame.buffer is None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1292 self.writeline('yield ', item)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1293 else:
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bcclaywell
parents:
diff changeset
1294 self.newline(item)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1295 close = 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1296 if frame.eval_ctx.volatile:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1297 self.write('(context.eval_ctx.autoescape and'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1298 ' escape or to_string)(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1299 elif frame.eval_ctx.autoescape:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1300 self.write('escape(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1301 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1302 self.write('to_string(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1303 if self.environment.finalize is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1304 self.write('environment.finalize(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1305 if getattr(self.environment.finalize,
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1306 "contextfunction", False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1307 self.write('context, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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1308 close += 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1309 self.visit(item, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1310 self.write(')' * close)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1311 if frame.buffer is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1312 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1313 if frame.buffer is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1314 # close the open parentheses
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1315 self.outdent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1316 self.writeline(len(body) == 1 and ')' or '))')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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1317
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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1318 # otherwise we create a format string as this is faster in that case
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parents:
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1319 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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1320 format = []
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1321 arguments = []
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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1322 for item in body:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1323 if isinstance(item, list):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1324 format.append(concat(item).replace('%', '%%'))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
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1325 else:
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bcclaywell
parents:
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1326 format.append('%s')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1327 arguments.append(item)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1328 self.writeline('yield ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1329 self.write(repr(concat(format)) + ' % (')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1330 self.indent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1331 for argument in arguments:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1332 self.newline(argument)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1333 close = 0
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1334 if frame.eval_ctx.volatile:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1335 self.write('(context.eval_ctx.autoescape and'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1336 ' escape or to_string)(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1337 close += 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1338 elif frame.eval_ctx.autoescape:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1339 self.write('escape(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1340 close += 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1341 if self.environment.finalize is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1342 self.write('environment.finalize(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1343 if getattr(self.environment.finalize,
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1344 'contextfunction', False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1345 self.write('context, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1346 elif getattr(self.environment.finalize,
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1347 'evalcontextfunction', False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1348 self.write('context.eval_ctx, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1349 elif getattr(self.environment.finalize,
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1350 'environmentfunction', False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1351 self.write('environment, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1352 close += 1
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1353 self.visit(argument, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1354 self.write(')' * close + ', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1355 self.outdent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1356 self.writeline(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1357
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1358 if outdent_later:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1359 self.outdent()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1360
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1361 def make_assignment_frame(self, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1362 # toplevel assignments however go into the local namespace and
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1363 # the current template's context. We create a copy of the frame
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1364 # here and add a set so that the Name visitor can add the assigned
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1365 # names here.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1366 if not frame.toplevel:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1367 return frame
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1368 assignment_frame = frame.copy()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1369 assignment_frame.toplevel_assignments = set()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1370 return assignment_frame
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1371
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1372 def export_assigned_vars(self, frame, assignment_frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1373 if not frame.toplevel:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1374 return
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1375 public_names = [x for x in assignment_frame.toplevel_assignments
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1376 if not x.startswith('_')]
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1377 if len(assignment_frame.toplevel_assignments) == 1:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1378 name = next(iter(assignment_frame.toplevel_assignments))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1379 self.writeline('context.vars[%r] = l_%s' % (name, name))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1380 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1381 self.writeline('context.vars.update({')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1382 for idx, name in enumerate(assignment_frame.toplevel_assignments):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1383 if idx:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1384 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1385 self.write('%r: l_%s' % (name, name))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1386 self.write('})')
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bcclaywell
parents:
diff changeset
1387 if public_names:
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bcclaywell
parents:
diff changeset
1388 if len(public_names) == 1:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1389 self.writeline('context.exported_vars.add(%r)' %
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1390 public_names[0])
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bcclaywell
parents:
diff changeset
1391 else:
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bcclaywell
parents:
diff changeset
1392 self.writeline('context.exported_vars.update((%s))' %
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bcclaywell
parents:
diff changeset
1393 ', '.join(imap(repr, public_names)))
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bcclaywell
parents:
diff changeset
1394
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bcclaywell
parents:
diff changeset
1395 def visit_Assign(self, node, frame):
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bcclaywell
parents:
diff changeset
1396 self.newline(node)
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bcclaywell
parents:
diff changeset
1397 assignment_frame = self.make_assignment_frame(frame)
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bcclaywell
parents:
diff changeset
1398 self.visit(node.target, assignment_frame)
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bcclaywell
parents:
diff changeset
1399 self.write(' = ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1400 self.visit(node.node, frame)
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bcclaywell
parents:
diff changeset
1401 self.export_assigned_vars(frame, assignment_frame)
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bcclaywell
parents:
diff changeset
1402
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bcclaywell
parents:
diff changeset
1403 def visit_AssignBlock(self, node, frame):
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bcclaywell
parents:
diff changeset
1404 block_frame = frame.inner()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1405 block_frame.inspect(node.body)
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bcclaywell
parents:
diff changeset
1406 aliases = self.push_scope(block_frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1407 self.pull_locals(block_frame)
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bcclaywell
parents:
diff changeset
1408 self.buffer(block_frame)
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bcclaywell
parents:
diff changeset
1409 self.blockvisit(node.body, block_frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1410 self.pop_scope(aliases, block_frame)
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bcclaywell
parents:
diff changeset
1411
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bcclaywell
parents:
diff changeset
1412 assignment_frame = self.make_assignment_frame(frame)
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bcclaywell
parents:
diff changeset
1413 self.newline(node)
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bcclaywell
parents:
diff changeset
1414 self.visit(node.target, assignment_frame)
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bcclaywell
parents:
diff changeset
1415 self.write(' = concat(%s)' % block_frame.buffer)
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bcclaywell
parents:
diff changeset
1416 self.export_assigned_vars(frame, assignment_frame)
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bcclaywell
parents:
diff changeset
1417
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bcclaywell
parents:
diff changeset
1418 # -- Expression Visitors
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bcclaywell
parents:
diff changeset
1419
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bcclaywell
parents:
diff changeset
1420 def visit_Name(self, node, frame):
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bcclaywell
parents:
diff changeset
1421 if node.ctx == 'store' and frame.toplevel:
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bcclaywell
parents:
diff changeset
1422 frame.toplevel_assignments.add(node.name)
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bcclaywell
parents:
diff changeset
1423 self.write('l_' + node.name)
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bcclaywell
parents:
diff changeset
1424 frame.assigned_names.add(node.name)
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bcclaywell
parents:
diff changeset
1425
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bcclaywell
parents:
diff changeset
1426 def visit_Const(self, node, frame):
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bcclaywell
parents:
diff changeset
1427 val = node.value
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bcclaywell
parents:
diff changeset
1428 if isinstance(val, float):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1429 self.write(str(val))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1430 else:
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bcclaywell
parents:
diff changeset
1431 self.write(repr(val))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1432
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bcclaywell
parents:
diff changeset
1433 def visit_TemplateData(self, node, frame):
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bcclaywell
parents:
diff changeset
1434 try:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1435 self.write(repr(node.as_const(frame.eval_ctx)))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1436 except nodes.Impossible:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1437 self.write('(context.eval_ctx.autoescape and Markup or identity)(%r)'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1438 % node.data)
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bcclaywell
parents:
diff changeset
1439
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bcclaywell
parents:
diff changeset
1440 def visit_Tuple(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1441 self.write('(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1442 idx = -1
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bcclaywell
parents:
diff changeset
1443 for idx, item in enumerate(node.items):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1444 if idx:
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bcclaywell
parents:
diff changeset
1445 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1446 self.visit(item, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1447 self.write(idx == 0 and ',)' or ')')
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bcclaywell
parents:
diff changeset
1448
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bcclaywell
parents:
diff changeset
1449 def visit_List(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1450 self.write('[')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1451 for idx, item in enumerate(node.items):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1452 if idx:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1453 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1454 self.visit(item, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1455 self.write(']')
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bcclaywell
parents:
diff changeset
1456
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1457 def visit_Dict(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1458 self.write('{')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1459 for idx, item in enumerate(node.items):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1460 if idx:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1461 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1462 self.visit(item.key, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1463 self.write(': ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1464 self.visit(item.value, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1465 self.write('}')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1466
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1467 def binop(operator, interceptable=True):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1468 def visitor(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1469 if self.environment.sandboxed and \
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1470 operator in self.environment.intercepted_binops:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1471 self.write('environment.call_binop(context, %r, ' % operator)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1472 self.visit(node.left, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1473 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1474 self.visit(node.right, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1475 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1476 self.write('(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1477 self.visit(node.left, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1478 self.write(' %s ' % operator)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1479 self.visit(node.right, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1480 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1481 return visitor
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1482
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1483 def uaop(operator, interceptable=True):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1484 def visitor(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1485 if self.environment.sandboxed and \
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1486 operator in self.environment.intercepted_unops:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1487 self.write('environment.call_unop(context, %r, ' % operator)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1488 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1489 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1490 self.write('(' + operator)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1491 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1492 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1493 return visitor
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1494
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1495 visit_Add = binop('+')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1496 visit_Sub = binop('-')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1497 visit_Mul = binop('*')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1498 visit_Div = binop('/')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1499 visit_FloorDiv = binop('//')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1500 visit_Pow = binop('**')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1501 visit_Mod = binop('%')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1502 visit_And = binop('and', interceptable=False)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1503 visit_Or = binop('or', interceptable=False)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1504 visit_Pos = uaop('+')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1505 visit_Neg = uaop('-')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1506 visit_Not = uaop('not ', interceptable=False)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1507 del binop, uaop
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1508
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1509 def visit_Concat(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1510 if frame.eval_ctx.volatile:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1511 func_name = '(context.eval_ctx.volatile and' \
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1512 ' markup_join or unicode_join)'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1513 elif frame.eval_ctx.autoescape:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1514 func_name = 'markup_join'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1515 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1516 func_name = 'unicode_join'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1517 self.write('%s((' % func_name)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1518 for arg in node.nodes:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1519 self.visit(arg, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1520 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1521 self.write('))')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1522
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1523 def visit_Compare(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1524 self.visit(node.expr, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1525 for op in node.ops:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1526 self.visit(op, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1527
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1528 def visit_Operand(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1529 self.write(' %s ' % operators[node.op])
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1530 self.visit(node.expr, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1531
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1532 def visit_Getattr(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1533 self.write('environment.getattr(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1534 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1535 self.write(', %r)' % node.attr)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1536
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1537 def visit_Getitem(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1538 # slices bypass the environment getitem method.
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1539 if isinstance(node.arg, nodes.Slice):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1540 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1541 self.write('[')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1542 self.visit(node.arg, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1543 self.write(']')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1544 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1545 self.write('environment.getitem(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1546 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1547 self.write(', ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1548 self.visit(node.arg, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1549 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1550
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1551 def visit_Slice(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1552 if node.start is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1553 self.visit(node.start, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1554 self.write(':')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1555 if node.stop is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1556 self.visit(node.stop, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1557 if node.step is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1558 self.write(':')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1559 self.visit(node.step, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1560
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1561 def visit_Filter(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1562 self.write(self.filters[node.name] + '(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1563 func = self.environment.filters.get(node.name)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1564 if func is None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1565 self.fail('no filter named %r' % node.name, node.lineno)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1566 if getattr(func, 'contextfilter', False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1567 self.write('context, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1568 elif getattr(func, 'evalcontextfilter', False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1569 self.write('context.eval_ctx, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1570 elif getattr(func, 'environmentfilter', False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1571 self.write('environment, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1572
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1573 # if the filter node is None we are inside a filter block
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1574 # and want to write to the current buffer
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1575 if node.node is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1576 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1577 elif frame.eval_ctx.volatile:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1578 self.write('(context.eval_ctx.autoescape and'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1579 ' Markup(concat(%s)) or concat(%s))' %
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1580 (frame.buffer, frame.buffer))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1581 elif frame.eval_ctx.autoescape:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1582 self.write('Markup(concat(%s))' % frame.buffer)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1583 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1584 self.write('concat(%s)' % frame.buffer)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1585 self.signature(node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1586 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1587
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1588 def visit_Test(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1589 self.write(self.tests[node.name] + '(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1590 if node.name not in self.environment.tests:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1591 self.fail('no test named %r' % node.name, node.lineno)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1592 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1593 self.signature(node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1594 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1595
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1596 def visit_CondExpr(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1597 def write_expr2():
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1598 if node.expr2 is not None:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1599 return self.visit(node.expr2, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1600 self.write('environment.undefined(%r)' % ('the inline if-'
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1601 'expression on %s evaluated to false and '
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1602 'no else section was defined.' % self.position(node)))
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1603
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1604 self.write('(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1605 self.visit(node.expr1, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1606 self.write(' if ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1607 self.visit(node.test, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1608 self.write(' else ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1609 write_expr2()
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1610 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1611
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1612 def visit_Call(self, node, frame, forward_caller=False):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1613 if self.environment.sandboxed:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1614 self.write('environment.call(context, ')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1615 else:
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1616 self.write('context.call(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1617 self.visit(node.node, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1618 extra_kwargs = forward_caller and {'caller': 'caller'} or None
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1619 self.signature(node, frame, extra_kwargs)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1620 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1621
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1622 def visit_Keyword(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1623 self.write(node.key + '=')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1624 self.visit(node.value, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1625
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1626 # -- Unused nodes for extensions
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1627
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1628 def visit_MarkSafe(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1629 self.write('Markup(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1630 self.visit(node.expr, frame)
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1631 self.write(')')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1632
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1633 def visit_MarkSafeIfAutoescape(self, node, frame):
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1634 self.write('(context.eval_ctx.autoescape and Markup or identity)(')
d67268158946 planemo upload commit a3f181f5f126803c654b3a66dd4e83a48f7e203b
bcclaywell
parents:
diff changeset
1635 self.visit(node.expr, frame)
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1636 self.write(')')
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1637
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1638 def visit_EnvironmentAttribute(self, node, frame):
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1639 self.write('environment.' + node.name)
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1640
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1641 def visit_ExtensionAttribute(self, node, frame):
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1642 self.write('environment.extensions[%r].%s' % (node.identifier, node.name))
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1643
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1644 def visit_ImportedName(self, node, frame):
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1645 self.write(self.import_aliases[node.importname])
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1646
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1647 def visit_InternalName(self, node, frame):
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1648 self.write(node.name)
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1649
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1650 def visit_ContextReference(self, node, frame):
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1651 self.write('context')
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1652
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1653 def visit_Continue(self, node, frame):
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1654 self.writeline('continue', node)
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1655
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1656 def visit_Break(self, node, frame):
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1657 self.writeline('break', node)
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1658
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1659 def visit_Scope(self, node, frame):
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1660 scope_frame = frame.inner()
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1661 scope_frame.inspect(node.iter_child_nodes())
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1662 aliases = self.push_scope(scope_frame)
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1663 self.pull_locals(scope_frame)
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1664 self.blockvisit(node.body, scope_frame)
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1665 self.pop_scope(aliases, scope_frame)
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1666
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1667 def visit_EvalContextModifier(self, node, frame):
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1668 for keyword in node.options:
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1669 self.writeline('context.eval_ctx.%s = ' % keyword.key)
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1670 self.visit(keyword.value, frame)
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1671 try:
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1672 val = keyword.value.as_const(frame.eval_ctx)
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1673 except nodes.Impossible:
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1674 frame.eval_ctx.volatile = True
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1675 else:
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1676 setattr(frame.eval_ctx, keyword.key, val)
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1677
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1678 def visit_ScopedEvalContextModifier(self, node, frame):
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1679 old_ctx_name = self.temporary_identifier()
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1680 safed_ctx = frame.eval_ctx.save()
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1681 self.writeline('%s = context.eval_ctx.save()' % old_ctx_name)
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1682 self.visit_EvalContextModifier(node, frame)
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parents:
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1683 for child in node.body:
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parents:
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1684 self.visit(child, frame)
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1685 frame.eval_ctx.revert(safed_ctx)
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parents:
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1686 self.writeline('context.eval_ctx.revert(%s)' % old_ctx_name)