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annotate roundup/cgi/TAL/TALGenerator.py @ 2119:cc4667ef3f12

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Added the ability to toggle where error messages go. They either go to the user (default, for backwards compatibility), the dispatcher, or both. These are able to be toggled via settings in config.py. Please refer to upgrading.txt for more details. (And Richard, let me know if I've done anything wrong with this checkin. :))
author Eddie Parker <eparker@users.sourceforge.net>
date Thu, 25 Mar 2004 19:27:15 +0000
parents fc52d57c6c3e
children 8c2402a78bb0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 ##############################################################################
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2 #
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3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors.
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the Zope Public License,
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7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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11 # FOR A PARTICULAR PURPOSE
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12 #
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13 ##############################################################################
2005
fc52d57c6c3e documentation cleanup
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14 """Code generator for TALInterpreter intermediate code.
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15 """
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16 __docformat__ = 'restructuredtext'
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17
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18 import string
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19 import re
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20 import cgi
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21
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22 from TALDefs import *
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23
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24 class TALGenerator:
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25
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26 inMacroUse = 0
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27 inMacroDef = 0
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28 source_file = None
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29
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30 def __init__(self, expressionCompiler=None, xml=1, source_file=None):
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31 if not expressionCompiler:
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32 from DummyEngine import DummyEngine
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33 expressionCompiler = DummyEngine()
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34 self.expressionCompiler = expressionCompiler
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35 self.CompilerError = expressionCompiler.getCompilerError()
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36 self.program = []
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37 self.stack = []
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38 self.todoStack = []
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39 self.macros = {}
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40 self.slots = {}
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41 self.slotStack = []
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42 self.xml = xml
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43 self.emit("version", TAL_VERSION)
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44 self.emit("mode", xml and "xml" or "html")
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45 if source_file is not None:
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46 self.source_file = source_file
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47 self.emit("setSourceFile", source_file)
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48
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49 def getCode(self):
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50 assert not self.stack
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51 assert not self.todoStack
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52 return self.optimize(self.program), self.macros
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53
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54 def optimize(self, program):
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55 output = []
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56 collect = []
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57 rawseen = cursor = 0
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58 if self.xml:
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59 endsep = "/>"
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60 else:
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61 endsep = " />"
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62 for cursor in xrange(len(program)+1):
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63 try:
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64 item = program[cursor]
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65 except IndexError:
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66 item = (None, None)
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67 opcode = item[0]
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68 if opcode == "rawtext":
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69 collect.append(item[1])
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70 continue
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71 if opcode == "endTag":
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72 collect.append("</%s>" % item[1])
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73 continue
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74 if opcode == "startTag":
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75 if self.optimizeStartTag(collect, item[1], item[2], ">"):
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76 continue
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77 if opcode == "startEndTag":
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78 if self.optimizeStartTag(collect, item[1], item[2], endsep):
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79 continue
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80 if opcode in ("beginScope", "endScope"):
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81 # Push *Scope instructions in front of any text instructions;
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82 # this allows text instructions separated only by *Scope
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83 # instructions to be joined together.
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84 output.append(self.optimizeArgsList(item))
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85 continue
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86 text = string.join(collect, "")
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87 if text:
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88 i = string.rfind(text, "\n")
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89 if i >= 0:
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90 i = len(text) - (i + 1)
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91 output.append(("rawtextColumn", (text, i)))
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92 else:
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93 output.append(("rawtextOffset", (text, len(text))))
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94 if opcode != None:
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95 output.append(self.optimizeArgsList(item))
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96 rawseen = cursor+1
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97 collect = []
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98 return self.optimizeCommonTriple(output)
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99
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100 def optimizeArgsList(self, item):
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101 if len(item) == 2:
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102 return item
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103 else:
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104 return item[0], tuple(item[1:])
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105
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106 actionIndex = {"replace":0, "insert":1, "metal":2, "tal":3, "xmlns":4,
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107 0: 0, 1: 1, 2: 2, 3: 3, 4: 4}
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108 def optimizeStartTag(self, collect, name, attrlist, end):
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109 if not attrlist:
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110 collect.append("<%s%s" % (name, end))
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111 return 1
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112 opt = 1
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113 new = ["<" + name]
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114 for i in range(len(attrlist)):
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115 item = attrlist[i]
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116 if len(item) > 2:
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117 opt = 0
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118 name, value, action = item[:3]
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119 action = self.actionIndex[action]
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120 attrlist[i] = (name, value, action) + item[3:]
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121 else:
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122 if item[1] is None:
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123 s = item[0]
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124 else:
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125 s = "%s=%s" % (item[0], quote(item[1]))
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126 attrlist[i] = item[0], s
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127 if item[1] is None:
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128 new.append(" " + item[0])
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129 else:
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130 new.append(" %s=%s" % (item[0], quote(item[1])))
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131 if opt:
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132 new.append(end)
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133 collect.extend(new)
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134 return opt
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135
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136 def optimizeCommonTriple(self, program):
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137 if len(program) < 3:
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138 return program
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139 output = program[:2]
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140 prev2, prev1 = output
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141 for item in program[2:]:
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142 if ( item[0] == "beginScope"
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143 and prev1[0] == "setPosition"
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144 and prev2[0] == "rawtextColumn"):
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145 position = output.pop()[1]
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146 text, column = output.pop()[1]
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147 prev1 = None, None
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148 closeprev = 0
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149 if output and output[-1][0] == "endScope":
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150 closeprev = 1
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151 output.pop()
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152 item = ("rawtextBeginScope",
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153 (text, column, position, closeprev, item[1]))
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154 output.append(item)
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155 prev2 = prev1
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156 prev1 = item
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157 return output
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158
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159 def todoPush(self, todo):
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160 self.todoStack.append(todo)
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161
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162 def todoPop(self):
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163 return self.todoStack.pop()
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164
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165 def compileExpression(self, expr):
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166 try:
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167 return self.expressionCompiler.compile(expr)
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168 except self.CompilerError, err:
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169 raise TALError('%s in expression %s' % (err.args[0], `expr`),
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170 self.position)
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171
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172 def pushProgram(self):
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173 self.stack.append(self.program)
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174 self.program = []
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175
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176 def popProgram(self):
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177 program = self.program
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178 self.program = self.stack.pop()
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179 return self.optimize(program)
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180
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181 def pushSlots(self):
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182 self.slotStack.append(self.slots)
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183 self.slots = {}
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184
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185 def popSlots(self):
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186 slots = self.slots
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187 self.slots = self.slotStack.pop()
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188 return slots
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189
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190 def emit(self, *instruction):
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191 self.program.append(instruction)
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192
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193 def emitStartTag(self, name, attrlist, isend=0):
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194 if isend:
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195 opcode = "startEndTag"
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196 else:
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197 opcode = "startTag"
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198 self.emit(opcode, name, attrlist)
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199
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200 def emitEndTag(self, name):
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201 if self.xml and self.program and self.program[-1][0] == "startTag":
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202 # Minimize empty element
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203 self.program[-1] = ("startEndTag",) + self.program[-1][1:]
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204 else:
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205 self.emit("endTag", name)
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206
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207 def emitOptTag(self, name, optTag, isend):
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208 program = self.popProgram() #block
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209 start = self.popProgram() #start tag
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210 if (isend or not program) and self.xml:
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211 # Minimize empty element
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212 start[-1] = ("startEndTag",) + start[-1][1:]
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213 isend = 1
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214 cexpr = optTag[0]
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215 if cexpr:
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216 cexpr = self.compileExpression(optTag[0])
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217 self.emit("optTag", name, cexpr, optTag[1], isend, start, program)
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218
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219 def emitRawText(self, text):
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220 self.emit("rawtext", text)
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221
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222 def emitText(self, text):
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223 self.emitRawText(cgi.escape(text))
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224
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225 def emitDefines(self, defines):
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226 for part in splitParts(defines):
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227 m = re.match(
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228 r"(?s)\s*(?:(global|local)\s+)?(%s)\s+(.*)\Z" % NAME_RE, part)
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diff changeset
229 if not m:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
230 raise TALError("invalid define syntax: " + `part`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
231 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
232 scope, name, expr = m.group(1, 2, 3)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
233 scope = scope or "local"
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
234 cexpr = self.compileExpression(expr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
235 if scope == "local":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
236 self.emit("setLocal", name, cexpr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
237 else:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
238 self.emit("setGlobal", name, cexpr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
239
1244
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
240 def emitOnError(self, name, onError, TALtag, isend):
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
241 block = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
242 key, expr = parseSubstitution(onError)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
243 cexpr = self.compileExpression(expr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
244 if key == "text":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
245 self.emit("insertText", cexpr, [])
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
246 else:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
247 assert key == "structure"
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
248 self.emit("insertStructure", cexpr, {}, [])
1244
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
249 if TALtag:
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
250 self.emitOptTag(name, (None, 1), isend)
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
251 else:
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
252 self.emitEndTag(name)
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
253 handler = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
254 self.emit("onError", block, handler)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
255
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
256 def emitCondition(self, expr):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
257 cexpr = self.compileExpression(expr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
258 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
259 self.emit("condition", cexpr, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
260
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
261 def emitRepeat(self, arg):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
262 m = re.match("(?s)\s*(%s)\s+(.*)\Z" % NAME_RE, arg)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
263 if not m:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
264 raise TALError("invalid repeat syntax: " + `arg`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
265 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
266 name, expr = m.group(1, 2)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
267 cexpr = self.compileExpression(expr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
268 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
269 self.emit("loop", name, cexpr, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
270
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
271 def emitSubstitution(self, arg, attrDict={}):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
272 key, expr = parseSubstitution(arg)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
273 cexpr = self.compileExpression(expr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
274 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
275 if key == "text":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
276 self.emit("insertText", cexpr, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
277 else:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
278 assert key == "structure"
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
279 self.emit("insertStructure", cexpr, attrDict, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
280
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
281 def emitDefineMacro(self, macroName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
282 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
283 macroName = string.strip(macroName)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
284 if self.macros.has_key(macroName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
285 raise METALError("duplicate macro definition: %s" % `macroName`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
286 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
287 if not re.match('%s$' % NAME_RE, macroName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
288 raise METALError("invalid macro name: %s" % `macroName`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
289 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
290 self.macros[macroName] = program
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
291 self.inMacroDef = self.inMacroDef - 1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
292 self.emit("defineMacro", macroName, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
293
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
294 def emitUseMacro(self, expr):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
295 cexpr = self.compileExpression(expr)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
296 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
297 self.inMacroUse = 0
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
298 self.emit("useMacro", expr, cexpr, self.popSlots(), program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
299
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
300 def emitDefineSlot(self, slotName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
301 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
302 slotName = string.strip(slotName)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
303 if not re.match('%s$' % NAME_RE, slotName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
304 raise METALError("invalid slot name: %s" % `slotName`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
305 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
306 self.emit("defineSlot", slotName, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
307
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
308 def emitFillSlot(self, slotName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
309 program = self.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
310 slotName = string.strip(slotName)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
311 if self.slots.has_key(slotName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
312 raise METALError("duplicate fill-slot name: %s" % `slotName`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
313 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
314 if not re.match('%s$' % NAME_RE, slotName):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
315 raise METALError("invalid slot name: %s" % `slotName`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
316 self.position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
317 self.slots[slotName] = program
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
318 self.inMacroUse = 1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
319 self.emit("fillSlot", slotName, program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
320
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
321 def unEmitWhitespace(self):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
322 collect = []
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
323 i = len(self.program) - 1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
324 while i >= 0:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
325 item = self.program[i]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
326 if item[0] != "rawtext":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
327 break
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
328 text = item[1]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
329 if not re.match(r"\A\s*\Z", text):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
330 break
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
331 collect.append(text)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
332 i = i-1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
333 del self.program[i+1:]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
334 if i >= 0 and self.program[i][0] == "rawtext":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
335 text = self.program[i][1]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
336 m = re.search(r"\s+\Z", text)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
337 if m:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
338 self.program[i] = ("rawtext", text[:m.start()])
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
339 collect.append(m.group())
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
340 collect.reverse()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
341 return string.join(collect, "")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
342
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
343 def unEmitNewlineWhitespace(self):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
344 collect = []
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
345 i = len(self.program)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
346 while i > 0:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
347 i = i-1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
348 item = self.program[i]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
349 if item[0] != "rawtext":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
350 break
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
351 text = item[1]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
352 if re.match(r"\A[ \t]*\Z", text):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
353 collect.append(text)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
354 continue
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
355 m = re.match(r"(?s)^(.*)(\n[ \t]*)\Z", text)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
356 if not m:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
357 break
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
358 text, rest = m.group(1, 2)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
359 collect.reverse()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
360 rest = rest + string.join(collect, "")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
361 del self.program[i:]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
362 if text:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
363 self.emit("rawtext", text)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
364 return rest
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
365 return None
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
366
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
367 def replaceAttrs(self, attrlist, repldict):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
368 if not repldict:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
369 return attrlist
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
370 newlist = []
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
371 for item in attrlist:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
372 key = item[0]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
373 if repldict.has_key(key):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
374 item = item[:2] + ("replace", repldict[key])
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
375 del repldict[key]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
376 newlist.append(item)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
377 for key, value in repldict.items(): # Add dynamic-only attributes
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
378 item = (key, None, "insert", value)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
379 newlist.append(item)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
380 return newlist
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
381
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
382 def emitStartElement(self, name, attrlist, taldict, metaldict,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
383 position=(None, None), isend=0):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
384 if not taldict and not metaldict:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
385 # Handle the simple, common case
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
386 self.emitStartTag(name, attrlist, isend)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
387 self.todoPush({})
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
388 if isend:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
389 self.emitEndElement(name, isend)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
390 return
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
391
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
392 self.position = position
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
393 for key, value in taldict.items():
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
394 if key not in KNOWN_TAL_ATTRIBUTES:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
395 raise TALError("bad TAL attribute: " + `key`, position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
396 if not (value or key == 'omit-tag'):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
397 raise TALError("missing value for TAL attribute: " +
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
398 `key`, position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
399 for key, value in metaldict.items():
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
400 if key not in KNOWN_METAL_ATTRIBUTES:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
401 raise METALError("bad METAL attribute: " + `key`,
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
402 position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
403 if not value:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
404 raise TALError("missing value for METAL attribute: " +
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
405 `key`, position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
406 todo = {}
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
407 defineMacro = metaldict.get("define-macro")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
408 useMacro = metaldict.get("use-macro")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
409 defineSlot = metaldict.get("define-slot")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
410 fillSlot = metaldict.get("fill-slot")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
411 define = taldict.get("define")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
412 condition = taldict.get("condition")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
413 repeat = taldict.get("repeat")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
414 content = taldict.get("content")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
415 replace = taldict.get("replace")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
416 attrsubst = taldict.get("attributes")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
417 onError = taldict.get("on-error")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
418 omitTag = taldict.get("omit-tag")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
419 TALtag = taldict.get("tal tag")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
420 if len(metaldict) > 1 and (defineMacro or useMacro):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
421 raise METALError("define-macro and use-macro cannot be used "
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
422 "together or with define-slot or fill-slot",
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
423 position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
424 if content and replace:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
425 raise TALError("content and replace are mutually exclusive",
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
426 position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
427
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
428 repeatWhitespace = None
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
429 if repeat:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
430 # Hack to include preceding whitespace in the loop program
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
431 repeatWhitespace = self.unEmitNewlineWhitespace()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
432 if position != (None, None):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
433 # XXX at some point we should insist on a non-trivial position
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
434 self.emit("setPosition", position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
435 if self.inMacroUse:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
436 if fillSlot:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
437 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
438 if self.source_file is not None:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
439 self.emit("setSourceFile", self.source_file)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
440 todo["fillSlot"] = fillSlot
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
441 self.inMacroUse = 0
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
442 else:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
443 if fillSlot:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
444 raise METALError, ("fill-slot must be within a use-macro",
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
445 position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
446 if not self.inMacroUse:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
447 if defineMacro:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
448 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
449 self.emit("version", TAL_VERSION)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
450 self.emit("mode", self.xml and "xml" or "html")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
451 if self.source_file is not None:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
452 self.emit("setSourceFile", self.source_file)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
453 todo["defineMacro"] = defineMacro
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
454 self.inMacroDef = self.inMacroDef + 1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
455 if useMacro:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
456 self.pushSlots()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
457 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
458 todo["useMacro"] = useMacro
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
459 self.inMacroUse = 1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
460 if defineSlot:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
461 if not self.inMacroDef:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
462 raise METALError, (
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
463 "define-slot must be within a define-macro",
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
464 position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
465 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
466 todo["defineSlot"] = defineSlot
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
467
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
468 if taldict:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
469 dict = {}
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
470 for item in attrlist:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
471 key, value = item[:2]
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
472 dict[key] = value
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
473 self.emit("beginScope", dict)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
474 todo["scope"] = 1
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
475 if onError:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
476 self.pushProgram() # handler
1244
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
477 if TALtag:
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
478 self.pushProgram() # start
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
479 self.emitStartTag(name, list(attrlist)) # Must copy attrlist!
1244
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
480 if TALtag:
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
481 self.pushProgram() # start
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
482 self.pushProgram() # block
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
483 todo["onError"] = onError
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
484 if define:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
485 self.emitDefines(define)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
486 todo["define"] = define
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
487 if condition:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
488 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
489 todo["condition"] = condition
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
490 if repeat:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
491 todo["repeat"] = repeat
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
492 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
493 if repeatWhitespace:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
494 self.emitText(repeatWhitespace)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
495 if content:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
496 todo["content"] = content
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
497 if replace:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
498 todo["replace"] = replace
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
499 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
500 optTag = omitTag is not None or TALtag
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
501 if optTag:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
502 todo["optional tag"] = omitTag, TALtag
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
503 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
504 if attrsubst:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
505 repldict = parseAttributeReplacements(attrsubst)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
506 for key, value in repldict.items():
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
507 repldict[key] = self.compileExpression(value)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
508 else:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
509 repldict = {}
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
510 if replace:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
511 todo["repldict"] = repldict
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
512 repldict = {}
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
513 self.emitStartTag(name, self.replaceAttrs(attrlist, repldict), isend)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
514 if optTag:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
515 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
516 if content:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
517 self.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
518 if todo and position != (None, None):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
519 todo["position"] = position
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
520 self.todoPush(todo)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
521 if isend:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
522 self.emitEndElement(name, isend)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
523
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
524 def emitEndElement(self, name, isend=0, implied=0):
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
525 todo = self.todoPop()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
526 if not todo:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
527 # Shortcut
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
528 if not isend:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
529 self.emitEndTag(name)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
530 return
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
531
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
532 self.position = position = todo.get("position", (None, None))
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
533 defineMacro = todo.get("defineMacro")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
534 useMacro = todo.get("useMacro")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
535 defineSlot = todo.get("defineSlot")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
536 fillSlot = todo.get("fillSlot")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
537 repeat = todo.get("repeat")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
538 content = todo.get("content")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
539 replace = todo.get("replace")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
540 condition = todo.get("condition")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
541 onError = todo.get("onError")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
542 define = todo.get("define")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
543 repldict = todo.get("repldict", {})
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
544 scope = todo.get("scope")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
545 optTag = todo.get("optional tag")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
546
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
547 if implied > 0:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
548 if defineMacro or useMacro or defineSlot or fillSlot:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
549 exc = METALError
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
550 what = "METAL"
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
551 else:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
552 exc = TALError
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
553 what = "TAL"
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
554 raise exc("%s attributes on <%s> require explicit </%s>" %
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
555 (what, name, name), position)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
556
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
557 if content:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
558 self.emitSubstitution(content, {})
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
559 if optTag:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
560 self.emitOptTag(name, optTag, isend)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
561 elif not isend:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
562 self.emitEndTag(name)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
563 if replace:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
564 self.emitSubstitution(replace, repldict)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
565 if repeat:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
566 self.emitRepeat(repeat)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
567 if condition:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
568 self.emitCondition(condition)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
569 if onError:
1244
8dd4f736370b merge from maintenance branch
Richard Jones <richard@users.sourceforge.net>
parents: 1049
diff changeset
570 self.emitOnError(name, onError, optTag and optTag[1], isend)
1049
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
571 if scope:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
572 self.emit("endScope")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
573 if defineSlot:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
574 self.emitDefineSlot(defineSlot)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
575 if fillSlot:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
576 self.emitFillSlot(fillSlot)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
577 if useMacro:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
578 self.emitUseMacro(useMacro)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
579 if defineMacro:
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
580 self.emitDefineMacro(defineMacro)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
581
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
582 def test():
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
583 t = TALGenerator()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
584 t.pushProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
585 t.emit("bar")
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
586 p = t.popProgram()
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
587 t.emit("foo", p)
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
588
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
589 if __name__ == "__main__":
Richard Jones <richard@users.sourceforge.net>
parents:
diff changeset
590 test()
Roundup Issue Tracker: http://roundup-tracker.org/