Mercurial > p > roundup > code
annotate roundup/cgi/TAL/TALGenerator.py @ 8264:09e8d1a4c796
docs: clarify wording, fix index, add superseder link
Make superseder, messages etc. properties index entries point to the
right place.
Link to description of using Superseder in the original overview.
fix bad wording on boolean properties.
| author | John Rouillard <rouilj@ieee.org> |
|---|---|
| date | Wed, 08 Jan 2025 11:39:54 -0500 |
| parents | 978285986b2c |
| children |
| rev | line source |
|---|---|
| 1049 | 1 ############################################################################## |
| 2 # | |
| 3 # Copyright (c) 2001, 2002 Zope Corporation and Contributors. | |
| 4 # All Rights Reserved. | |
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5 # |
| 1049 | 6 # This software is subject to the provisions of the Zope Public License, |
| 7 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution. | |
| 8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED | |
| 9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS | |
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11 # FOR A PARTICULAR PURPOSE. |
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12 # |
| 1049 | 13 ############################################################################## |
| 14 """ | |
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15 Code generator for TALInterpreter intermediate code. |
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16 """ |
| 1049 | 17 |
| 18 import re | |
| 19 | |
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20 from . import TALDefs |
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21 |
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22 from .TALDefs import NAME_RE, TAL_VERSION |
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23 from .TALDefs import I18NError, METALError, TALError |
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24 from .TALDefs import parseSubstitution |
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25 from .TranslationContext import TranslationContext, DEFAULT_DOMAIN |
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26 |
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27 from roundup.anypy.cgi_ import cgi |
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28 from roundup.anypy.html import html_escape |
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29 |
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30 I18N_REPLACE = 1 |
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31 I18N_CONTENT = 2 |
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32 I18N_EXPRESSION = 3 |
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33 |
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34 _name_rx = re.compile(NAME_RE) |
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35 |
| 1049 | 36 |
| 37 class TALGenerator: | |
| 38 | |
| 39 inMacroUse = 0 | |
| 40 inMacroDef = 0 | |
| 41 source_file = None | |
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42 |
| 1049 | 43 def __init__(self, expressionCompiler=None, xml=1, source_file=None): |
| 44 if not expressionCompiler: | |
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45 from .DummyEngine import DummyEngine |
| 1049 | 46 expressionCompiler = DummyEngine() |
| 47 self.expressionCompiler = expressionCompiler | |
| 48 self.CompilerError = expressionCompiler.getCompilerError() | |
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49 # This holds the emitted opcodes representing the input |
| 1049 | 50 self.program = [] |
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51 # The program stack for when we need to do some sub-evaluation for an |
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52 # intermediate result. E.g. in an i18n:name tag for which the |
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53 # contents describe the ${name} value. |
| 1049 | 54 self.stack = [] |
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55 # Another stack of postponed actions. Elements on this stack are a |
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56 # dictionary; key/values contain useful information that |
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57 # emitEndElement needs to finish its calculations |
| 1049 | 58 self.todoStack = [] |
| 59 self.macros = {} | |
| 60 self.slots = {} | |
| 61 self.slotStack = [] | |
| 62 self.xml = xml | |
| 63 self.emit("version", TAL_VERSION) | |
| 64 self.emit("mode", xml and "xml" or "html") | |
| 65 if source_file is not None: | |
| 66 self.source_file = source_file | |
| 67 self.emit("setSourceFile", source_file) | |
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68 self.i18nContext = TranslationContext() |
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69 self.i18nLevel = 0 |
| 1049 | 70 |
| 71 def getCode(self): | |
| 72 assert not self.stack | |
| 73 assert not self.todoStack | |
| 74 return self.optimize(self.program), self.macros | |
| 75 | |
| 76 def optimize(self, program): | |
| 77 output = [] | |
| 78 collect = [] | |
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79 cursor = 0 |
| 1049 | 80 if self.xml: |
| 81 endsep = "/>" | |
| 82 else: | |
| 83 endsep = " />" | |
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84 for cursor in range(len(program)+1): |
| 1049 | 85 try: |
| 86 item = program[cursor] | |
| 87 except IndexError: | |
| 88 item = (None, None) | |
| 89 opcode = item[0] | |
| 90 if opcode == "rawtext": | |
| 91 collect.append(item[1]) | |
| 92 continue | |
| 93 if opcode == "endTag": | |
| 94 collect.append("</%s>" % item[1]) | |
| 95 continue | |
| 96 if opcode == "startTag": | |
| 97 if self.optimizeStartTag(collect, item[1], item[2], ">"): | |
| 98 continue | |
| 99 if opcode == "startEndTag": | |
| 100 if self.optimizeStartTag(collect, item[1], item[2], endsep): | |
| 101 continue | |
| 102 if opcode in ("beginScope", "endScope"): | |
| 103 # Push *Scope instructions in front of any text instructions; | |
| 104 # this allows text instructions separated only by *Scope | |
| 105 # instructions to be joined together. | |
| 106 output.append(self.optimizeArgsList(item)) | |
| 107 continue | |
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108 if opcode == 'noop': |
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109 # This is a spacer for end tags in the face of i18n:name |
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110 # attributes. We can't let the optimizer collect immediately |
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111 # following end tags into the same rawtextOffset. |
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112 opcode = None |
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113 pass |
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114 text = "".join(collect) |
| 1049 | 115 if text: |
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116 i = text.rfind("\n") |
| 1049 | 117 if i >= 0: |
| 118 i = len(text) - (i + 1) | |
| 119 output.append(("rawtextColumn", (text, i))) | |
| 120 else: | |
| 121 output.append(("rawtextOffset", (text, len(text)))) | |
| 122 if opcode != None: | |
| 123 output.append(self.optimizeArgsList(item)) | |
| 124 collect = [] | |
| 125 return self.optimizeCommonTriple(output) | |
| 126 | |
| 127 def optimizeArgsList(self, item): | |
| 128 if len(item) == 2: | |
| 129 return item | |
| 130 else: | |
| 131 return item[0], tuple(item[1:]) | |
| 132 | |
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133 # These codes are used to indicate what sort of special actions |
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134 # are needed for each special attribute. (Simple attributes don't |
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135 # get action codes.) |
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136 # |
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137 # The special actions (which are modal) are handled by |
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138 # TALInterpreter.attrAction() and .attrAction_tal(). |
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139 # |
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140 # Each attribute is represented by a tuple: |
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141 # |
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142 # (name, value) -- a simple name/value pair, with |
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143 # no special processing |
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144 # |
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145 # (name, value, action, *extra) -- attribute with special |
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146 # processing needs, action is a |
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147 # code that indicates which |
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148 # branch to take, and *extra |
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149 # contains additional, |
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150 # action-specific information |
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151 # needed by the processing |
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152 # |
| 1049 | 153 def optimizeStartTag(self, collect, name, attrlist, end): |
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154 # return true if the tag can be converted to plain text |
| 1049 | 155 if not attrlist: |
| 156 collect.append("<%s%s" % (name, end)) | |
| 157 return 1 | |
| 158 opt = 1 | |
| 159 new = ["<" + name] | |
| 160 for i in range(len(attrlist)): | |
| 161 item = attrlist[i] | |
| 162 if len(item) > 2: | |
| 163 opt = 0 | |
| 164 name, value, action = item[:3] | |
| 165 attrlist[i] = (name, value, action) + item[3:] | |
| 166 else: | |
| 167 if item[1] is None: | |
| 168 s = item[0] | |
| 169 else: | |
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170 s = '%s="%s"' % (item[0], TALDefs.attrEscape(item[1])) |
| 1049 | 171 attrlist[i] = item[0], s |
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172 new.append(" " + s) |
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173 # if no non-optimizable attributes were found, convert to plain text |
| 1049 | 174 if opt: |
| 175 new.append(end) | |
| 176 collect.extend(new) | |
| 177 return opt | |
| 178 | |
| 179 def optimizeCommonTriple(self, program): | |
| 180 if len(program) < 3: | |
| 181 return program | |
| 182 output = program[:2] | |
| 183 prev2, prev1 = output | |
| 184 for item in program[2:]: | |
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185 if ( item[0] == "beginScope" |
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186 and prev1[0] == "setPosition" |
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187 and prev2[0] == "rawtextColumn"): |
| 1049 | 188 position = output.pop()[1] |
| 189 text, column = output.pop()[1] | |
| 190 prev1 = None, None | |
| 191 closeprev = 0 | |
| 192 if output and output[-1][0] == "endScope": | |
| 193 closeprev = 1 | |
| 194 output.pop() | |
| 195 item = ("rawtextBeginScope", | |
| 196 (text, column, position, closeprev, item[1])) | |
| 197 output.append(item) | |
| 198 prev2 = prev1 | |
| 199 prev1 = item | |
| 200 return output | |
| 201 | |
| 202 def todoPush(self, todo): | |
| 203 self.todoStack.append(todo) | |
| 204 | |
| 205 def todoPop(self): | |
| 206 return self.todoStack.pop() | |
| 207 | |
| 208 def compileExpression(self, expr): | |
| 209 try: | |
| 210 return self.expressionCompiler.compile(expr) | |
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211 except self.CompilerError as err: |
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212 raise TALError('%s in expression %s' % (err.args[0], repr(expr)), |
| 1049 | 213 self.position) |
| 214 | |
| 215 def pushProgram(self): | |
| 216 self.stack.append(self.program) | |
| 217 self.program = [] | |
| 218 | |
| 219 def popProgram(self): | |
| 220 program = self.program | |
| 221 self.program = self.stack.pop() | |
| 222 return self.optimize(program) | |
| 223 | |
| 224 def pushSlots(self): | |
| 225 self.slotStack.append(self.slots) | |
| 226 self.slots = {} | |
| 227 | |
| 228 def popSlots(self): | |
| 229 slots = self.slots | |
| 230 self.slots = self.slotStack.pop() | |
| 231 return slots | |
| 232 | |
| 233 def emit(self, *instruction): | |
| 234 self.program.append(instruction) | |
| 235 | |
| 236 def emitStartTag(self, name, attrlist, isend=0): | |
| 237 if isend: | |
| 238 opcode = "startEndTag" | |
| 239 else: | |
| 240 opcode = "startTag" | |
| 241 self.emit(opcode, name, attrlist) | |
| 242 | |
| 243 def emitEndTag(self, name): | |
| 244 if self.xml and self.program and self.program[-1][0] == "startTag": | |
| 245 # Minimize empty element | |
| 246 self.program[-1] = ("startEndTag",) + self.program[-1][1:] | |
| 247 else: | |
| 248 self.emit("endTag", name) | |
| 249 | |
| 250 def emitOptTag(self, name, optTag, isend): | |
| 251 program = self.popProgram() #block | |
| 252 start = self.popProgram() #start tag | |
| 253 if (isend or not program) and self.xml: | |
| 254 # Minimize empty element | |
| 255 start[-1] = ("startEndTag",) + start[-1][1:] | |
| 256 isend = 1 | |
| 257 cexpr = optTag[0] | |
| 258 if cexpr: | |
| 259 cexpr = self.compileExpression(optTag[0]) | |
| 260 self.emit("optTag", name, cexpr, optTag[1], isend, start, program) | |
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261 |
| 1049 | 262 def emitRawText(self, text): |
| 263 self.emit("rawtext", text) | |
| 264 | |
| 265 def emitText(self, text): | |
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266 self.emitRawText(html_escape(text)) |
| 1049 | 267 |
| 268 def emitDefines(self, defines): | |
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269 for part in TALDefs.splitParts(defines): |
| 1049 | 270 m = re.match( |
| 271 r"(?s)\s*(?:(global|local)\s+)?(%s)\s+(.*)\Z" % NAME_RE, part) | |
| 272 if not m: | |
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273 raise TALError("invalid define syntax: " + repr(part), |
| 1049 | 274 self.position) |
| 275 scope, name, expr = m.group(1, 2, 3) | |
| 276 scope = scope or "local" | |
| 277 cexpr = self.compileExpression(expr) | |
| 278 if scope == "local": | |
| 279 self.emit("setLocal", name, cexpr) | |
| 280 else: | |
| 281 self.emit("setGlobal", name, cexpr) | |
| 282 | |
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283 def emitOnError(self, name, onError, TALtag, isend): |
| 1049 | 284 block = self.popProgram() |
| 285 key, expr = parseSubstitution(onError) | |
| 286 cexpr = self.compileExpression(expr) | |
| 287 if key == "text": | |
| 288 self.emit("insertText", cexpr, []) | |
| 289 else: | |
| 290 assert key == "structure" | |
| 291 self.emit("insertStructure", cexpr, {}, []) | |
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292 if TALtag: |
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293 self.emitOptTag(name, (None, 1), isend) |
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294 else: |
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295 self.emitEndTag(name) |
| 1049 | 296 handler = self.popProgram() |
| 297 self.emit("onError", block, handler) | |
| 298 | |
| 299 def emitCondition(self, expr): | |
| 300 cexpr = self.compileExpression(expr) | |
| 301 program = self.popProgram() | |
| 302 self.emit("condition", cexpr, program) | |
| 303 | |
| 304 def emitRepeat(self, arg): | |
| 5809 | 305 m = re.match(r"(?s)\s*(%s)\s+(.*)\Z" % NAME_RE, arg) |
| 1049 | 306 if not m: |
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307 raise TALError("invalid repeat syntax: " + repr(arg), |
| 1049 | 308 self.position) |
| 309 name, expr = m.group(1, 2) | |
| 310 cexpr = self.compileExpression(expr) | |
| 311 program = self.popProgram() | |
| 312 self.emit("loop", name, cexpr, program) | |
| 313 | |
| 314 def emitSubstitution(self, arg, attrDict={}): | |
| 315 key, expr = parseSubstitution(arg) | |
| 316 cexpr = self.compileExpression(expr) | |
| 317 program = self.popProgram() | |
| 318 if key == "text": | |
| 319 self.emit("insertText", cexpr, program) | |
| 320 else: | |
| 321 assert key == "structure" | |
| 322 self.emit("insertStructure", cexpr, attrDict, program) | |
| 323 | |
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324 def emitI18nVariable(self, stuff): |
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325 # Used for i18n:name attributes. arg is extra information describing |
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326 # how the contents of the variable should get filled in, and it will |
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327 # either be a 1-tuple or a 2-tuple. If arg[0] is None, then the |
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328 # i18n:name value is taken implicitly from the contents of the tag, |
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329 # e.g. "I live in <span i18n:name="country">the USA</span>". In this |
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330 # case, arg[1] is the opcode sub-program describing the contents of |
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331 # the tag. |
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332 # |
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333 # When arg[0] is not None, it contains the tal expression used to |
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334 # calculate the contents of the variable, e.g. |
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335 # "I live in <span i18n:name="country" |
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336 # tal:replace="here/countryOfOrigin" />" |
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337 varname, action, expression = stuff |
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338 m = _name_rx.match(varname) |
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339 if m is None or m.group() != varname: |
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340 raise TALError("illegal i18n:name: %r" % varname, self.position) |
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341 key = cexpr = None |
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342 program = self.popProgram() |
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343 if action == I18N_REPLACE: |
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344 # This is a tag with an i18n:name and a tal:replace (implicit or |
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345 # explicit). Get rid of the first and last elements of the |
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346 # program, which are the start and end tag opcodes of the tag. |
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347 program = program[1:-1] |
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348 elif action == I18N_CONTENT: |
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349 # This is a tag with an i18n:name and a tal:content |
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350 # (explicit-only). Keep the first and last elements of the |
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351 # program, so we keep the start and end tag output. |
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352 pass |
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353 else: |
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354 assert action == I18N_EXPRESSION |
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355 key, expr = parseSubstitution(expression) |
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356 cexpr = self.compileExpression(expr) |
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357 # XXX Would key be anything but 'text' or None? |
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358 assert key in ('text', None) |
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359 self.emit('i18nVariable', varname, program, cexpr) |
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360 |
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361 def emitTranslation(self, msgid, i18ndata): |
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362 program = self.popProgram() |
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363 if i18ndata is None: |
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364 self.emit('insertTranslation', msgid, program) |
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365 else: |
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366 key, expr = parseSubstitution(i18ndata) |
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367 cexpr = self.compileExpression(expr) |
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368 assert key == 'text' |
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369 self.emit('insertTranslation', msgid, program, cexpr) |
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370 |
| 1049 | 371 def emitDefineMacro(self, macroName): |
| 372 program = self.popProgram() | |
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373 macroName = macroName.strip() |
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374 if macroName in self.macros: |
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375 raise METALError("duplicate macro definition: %s" % repr(macroName), |
| 1049 | 376 self.position) |
| 377 if not re.match('%s$' % NAME_RE, macroName): | |
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378 raise METALError("invalid macro name: %s" % repr(macroName), |
| 1049 | 379 self.position) |
| 380 self.macros[macroName] = program | |
| 381 self.inMacroDef = self.inMacroDef - 1 | |
| 382 self.emit("defineMacro", macroName, program) | |
| 383 | |
| 384 def emitUseMacro(self, expr): | |
| 385 cexpr = self.compileExpression(expr) | |
| 386 program = self.popProgram() | |
| 387 self.inMacroUse = 0 | |
| 388 self.emit("useMacro", expr, cexpr, self.popSlots(), program) | |
| 389 | |
| 390 def emitDefineSlot(self, slotName): | |
| 391 program = self.popProgram() | |
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392 slotName = slotName.strip() |
| 1049 | 393 if not re.match('%s$' % NAME_RE, slotName): |
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394 raise METALError("invalid slot name: %s" % repr(slotName), |
| 1049 | 395 self.position) |
| 396 self.emit("defineSlot", slotName, program) | |
| 397 | |
| 398 def emitFillSlot(self, slotName): | |
| 399 program = self.popProgram() | |
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400 slotName = slotName.strip() |
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401 if slotName in self.slots: |
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402 raise METALError("duplicate fill-slot name: %s" % repr(slotName), |
| 1049 | 403 self.position) |
| 404 if not re.match('%s$' % NAME_RE, slotName): | |
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405 raise METALError("invalid slot name: %s" % repr(slotName), |
| 1049 | 406 self.position) |
| 407 self.slots[slotName] = program | |
| 408 self.inMacroUse = 1 | |
| 409 self.emit("fillSlot", slotName, program) | |
| 410 | |
| 411 def unEmitWhitespace(self): | |
| 412 collect = [] | |
| 413 i = len(self.program) - 1 | |
| 414 while i >= 0: | |
| 415 item = self.program[i] | |
| 416 if item[0] != "rawtext": | |
| 417 break | |
| 418 text = item[1] | |
| 419 if not re.match(r"\A\s*\Z", text): | |
| 420 break | |
| 421 collect.append(text) | |
| 422 i = i-1 | |
| 423 del self.program[i+1:] | |
| 424 if i >= 0 and self.program[i][0] == "rawtext": | |
| 425 text = self.program[i][1] | |
| 426 m = re.search(r"\s+\Z", text) | |
| 427 if m: | |
| 428 self.program[i] = ("rawtext", text[:m.start()]) | |
| 429 collect.append(m.group()) | |
| 430 collect.reverse() | |
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431 return "".join(collect) |
| 1049 | 432 |
| 433 def unEmitNewlineWhitespace(self): | |
| 434 collect = [] | |
| 435 i = len(self.program) | |
| 436 while i > 0: | |
| 437 i = i-1 | |
| 438 item = self.program[i] | |
| 439 if item[0] != "rawtext": | |
| 440 break | |
| 441 text = item[1] | |
| 442 if re.match(r"\A[ \t]*\Z", text): | |
| 443 collect.append(text) | |
| 444 continue | |
| 445 m = re.match(r"(?s)^(.*)(\n[ \t]*)\Z", text) | |
| 446 if not m: | |
| 447 break | |
| 448 text, rest = m.group(1, 2) | |
| 449 collect.reverse() | |
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450 rest = rest + "".join(collect) |
| 1049 | 451 del self.program[i:] |
| 452 if text: | |
| 453 self.emit("rawtext", text) | |
| 454 return rest | |
| 455 return None | |
| 456 | |
| 457 def replaceAttrs(self, attrlist, repldict): | |
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458 # Each entry in attrlist starts like (name, value). |
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459 # Result is (name, value, action, expr, xlat) if there is a |
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460 # tal:attributes entry for that attribute. Additional attrs |
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461 # defined only by tal:attributes are added here. |
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462 # |
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463 # (name, value, action, expr, xlat) |
| 1049 | 464 if not repldict: |
| 465 return attrlist | |
| 466 newlist = [] | |
| 467 for item in attrlist: | |
| 468 key = item[0] | |
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469 if key in repldict: |
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470 expr, xlat, msgid = repldict[key] |
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471 item = item[:2] + ("replace", expr, xlat, msgid) |
| 1049 | 472 del repldict[key] |
| 473 newlist.append(item) | |
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474 # Add dynamic-only attributes |
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475 for key, (expr, xlat, msgid) in repldict.items(): |
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476 newlist.append((key, None, "insert", expr, xlat, msgid)) |
| 1049 | 477 return newlist |
| 478 | |
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479 def emitStartElement(self, name, attrlist, taldict, metaldict, i18ndict, |
| 1049 | 480 position=(None, None), isend=0): |
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481 if not taldict and not metaldict and not i18ndict: |
| 1049 | 482 # Handle the simple, common case |
| 483 self.emitStartTag(name, attrlist, isend) | |
| 484 self.todoPush({}) | |
| 485 if isend: | |
| 486 self.emitEndElement(name, isend) | |
| 487 return | |
| 488 | |
| 489 self.position = position | |
| 490 for key, value in taldict.items(): | |
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491 if key not in TALDefs.KNOWN_TAL_ATTRIBUTES: |
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492 raise TALError("bad TAL attribute: " + repr(key), position) |
| 1049 | 493 if not (value or key == 'omit-tag'): |
| 494 raise TALError("missing value for TAL attribute: " + | |
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495 repr(key), position) |
| 1049 | 496 for key, value in metaldict.items(): |
|
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497 if key not in TALDefs.KNOWN_METAL_ATTRIBUTES: |
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498 raise METALError("bad METAL attribute: " + repr(key), |
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499 position) |
| 1049 | 500 if not value: |
| 501 raise TALError("missing value for METAL attribute: " + | |
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502 repr(key), position) |
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503 for key, value in i18ndict.items(): |
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504 if key not in TALDefs.KNOWN_I18N_ATTRIBUTES: |
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505 raise I18NError("bad i18n attribute: " + repr(key), position) |
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506 if not value and key in ("attributes", "data", "id"): |
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507 raise I18NError("missing value for i18n attribute: " + |
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508 repr(key), position) |
| 1049 | 509 todo = {} |
| 510 defineMacro = metaldict.get("define-macro") | |
| 511 useMacro = metaldict.get("use-macro") | |
| 512 defineSlot = metaldict.get("define-slot") | |
| 513 fillSlot = metaldict.get("fill-slot") | |
| 514 define = taldict.get("define") | |
| 515 condition = taldict.get("condition") | |
| 516 repeat = taldict.get("repeat") | |
| 517 content = taldict.get("content") | |
| 518 replace = taldict.get("replace") | |
| 519 attrsubst = taldict.get("attributes") | |
| 520 onError = taldict.get("on-error") | |
| 521 omitTag = taldict.get("omit-tag") | |
| 522 TALtag = taldict.get("tal tag") | |
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523 i18nattrs = i18ndict.get("attributes") |
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524 # Preserve empty string if implicit msgids are used. We'll generate |
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525 # code with the msgid='' and calculate the right implicit msgid during |
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526 # interpretation phase. |
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527 msgid = i18ndict.get("translate") |
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528 varname = i18ndict.get('name') |
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529 i18ndata = i18ndict.get('data') |
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530 |
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531 if varname and not self.i18nLevel: |
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532 raise I18NError( |
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533 "i18n:name can only occur inside a translation unit", |
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534 position) |
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535 |
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536 if i18ndata and not msgid: |
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537 raise I18NError("i18n:data must be accompanied by i18n:translate", |
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538 position) |
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539 |
| 1049 | 540 if len(metaldict) > 1 and (defineMacro or useMacro): |
| 541 raise METALError("define-macro and use-macro cannot be used " | |
| 542 "together or with define-slot or fill-slot", | |
| 543 position) | |
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544 if replace: |
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545 if content: |
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546 raise TALError( |
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547 "tal:content and tal:replace are mutually exclusive", |
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548 position) |
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549 if msgid is not None: |
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550 raise I18NError( |
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551 "i18n:translate and tal:replace are mutually exclusive", |
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552 position) |
| 1049 | 553 |
| 554 repeatWhitespace = None | |
| 555 if repeat: | |
| 556 # Hack to include preceding whitespace in the loop program | |
| 557 repeatWhitespace = self.unEmitNewlineWhitespace() | |
| 558 if position != (None, None): | |
| 559 # XXX at some point we should insist on a non-trivial position | |
| 560 self.emit("setPosition", position) | |
| 561 if self.inMacroUse: | |
| 562 if fillSlot: | |
| 563 self.pushProgram() | |
| 564 if self.source_file is not None: | |
| 565 self.emit("setSourceFile", self.source_file) | |
| 566 todo["fillSlot"] = fillSlot | |
| 567 self.inMacroUse = 0 | |
| 568 else: | |
| 569 if fillSlot: | |
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570 raise METALError("fill-slot must be within a use-macro", |
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571 position) |
| 1049 | 572 if not self.inMacroUse: |
| 573 if defineMacro: | |
| 574 self.pushProgram() | |
| 575 self.emit("version", TAL_VERSION) | |
| 576 self.emit("mode", self.xml and "xml" or "html") | |
| 577 if self.source_file is not None: | |
| 578 self.emit("setSourceFile", self.source_file) | |
| 579 todo["defineMacro"] = defineMacro | |
| 580 self.inMacroDef = self.inMacroDef + 1 | |
| 581 if useMacro: | |
| 582 self.pushSlots() | |
| 583 self.pushProgram() | |
| 584 todo["useMacro"] = useMacro | |
| 585 self.inMacroUse = 1 | |
| 586 if defineSlot: | |
| 587 if not self.inMacroDef: | |
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588 raise METALError( |
| 1049 | 589 "define-slot must be within a define-macro", |
| 590 position) | |
| 591 self.pushProgram() | |
| 592 todo["defineSlot"] = defineSlot | |
| 593 | |
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594 if defineSlot or i18ndict: |
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595 |
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596 domain = i18ndict.get("domain") or self.i18nContext.domain |
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597 source = i18ndict.get("source") or self.i18nContext.source |
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598 target = i18ndict.get("target") or self.i18nContext.target |
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599 if ( domain != DEFAULT_DOMAIN |
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600 or source is not None |
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601 or target is not None): |
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602 self.i18nContext = TranslationContext(self.i18nContext, |
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603 domain=domain, |
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604 source=source, |
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605 target=target) |
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606 self.emit("beginI18nContext", |
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607 {"domain": domain, "source": source, |
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608 "target": target}) |
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609 todo["i18ncontext"] = 1 |
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610 if taldict or i18ndict: |
| 1049 | 611 dict = {} |
| 612 for item in attrlist: | |
| 613 key, value = item[:2] | |
| 614 dict[key] = value | |
| 615 self.emit("beginScope", dict) | |
| 616 todo["scope"] = 1 | |
| 617 if onError: | |
| 618 self.pushProgram() # handler | |
|
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619 if TALtag: |
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620 self.pushProgram() # start |
| 1049 | 621 self.emitStartTag(name, list(attrlist)) # Must copy attrlist! |
|
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622 if TALtag: |
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623 self.pushProgram() # start |
| 1049 | 624 self.pushProgram() # block |
| 625 todo["onError"] = onError | |
| 626 if define: | |
| 627 self.emitDefines(define) | |
| 628 todo["define"] = define | |
| 629 if condition: | |
| 630 self.pushProgram() | |
| 631 todo["condition"] = condition | |
| 632 if repeat: | |
| 633 todo["repeat"] = repeat | |
| 634 self.pushProgram() | |
| 635 if repeatWhitespace: | |
| 636 self.emitText(repeatWhitespace) | |
| 637 if content: | |
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638 if varname: |
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639 todo['i18nvar'] = (varname, I18N_CONTENT, None) |
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640 todo["content"] = content |
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641 self.pushProgram() |
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642 else: |
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643 todo["content"] = content |
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644 elif replace: |
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645 # tal:replace w/ i18n:name has slightly different semantics. What |
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646 # we're actually replacing then is the contents of the ${name} |
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647 # placeholder. |
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648 if varname: |
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649 todo['i18nvar'] = (varname, I18N_EXPRESSION, replace) |
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650 else: |
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651 todo["replace"] = replace |
| 1049 | 652 self.pushProgram() |
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653 # i18n:name w/o tal:replace uses the content as the interpolation |
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654 # dictionary values |
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655 elif varname: |
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656 todo['i18nvar'] = (varname, I18N_REPLACE, None) |
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657 self.pushProgram() |
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658 if msgid is not None: |
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659 self.i18nLevel += 1 |
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660 todo['msgid'] = msgid |
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661 if i18ndata: |
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662 todo['i18ndata'] = i18ndata |
| 1049 | 663 optTag = omitTag is not None or TALtag |
| 664 if optTag: | |
| 665 todo["optional tag"] = omitTag, TALtag | |
| 666 self.pushProgram() | |
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667 if attrsubst or i18nattrs: |
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668 if attrsubst: |
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669 repldict = TALDefs.parseAttributeReplacements(attrsubst, |
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670 self.xml) |
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671 else: |
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672 repldict = {} |
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673 if i18nattrs: |
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674 i18nattrs = _parseI18nAttributes(i18nattrs, attrlist, repldict, |
|
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675 self.position, self.xml, |
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676 self.source_file) |
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677 else: |
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678 i18nattrs = {} |
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679 # Convert repldict's name-->expr mapping to a |
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680 # name-->(compiled_expr, translate) mapping |
| 1049 | 681 for key, value in repldict.items(): |
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682 if i18nattrs.get(key, None): |
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683 raise I18NError( |
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684 ("attribute [%s] cannot both be part of tal:attributes" + |
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685 " and have a msgid in i18n:attributes") % key, |
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686 position) |
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687 ce = self.compileExpression(value) |
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688 repldict[key] = ce, key in i18nattrs, i18nattrs.get(key) |
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689 for key in i18nattrs: |
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690 if key not in repldict: |
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691 repldict[key] = None, 1, i18nattrs.get(key) |
| 1049 | 692 else: |
| 693 repldict = {} | |
| 694 if replace: | |
| 695 todo["repldict"] = repldict | |
| 696 repldict = {} | |
| 697 self.emitStartTag(name, self.replaceAttrs(attrlist, repldict), isend) | |
| 698 if optTag: | |
| 699 self.pushProgram() | |
|
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700 if content and not varname: |
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701 self.pushProgram() |
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702 if msgid is not None: |
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703 self.pushProgram() |
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704 if content and varname: |
| 1049 | 705 self.pushProgram() |
| 706 if todo and position != (None, None): | |
| 707 todo["position"] = position | |
| 708 self.todoPush(todo) | |
| 709 if isend: | |
| 710 self.emitEndElement(name, isend) | |
| 711 | |
| 712 def emitEndElement(self, name, isend=0, implied=0): | |
| 713 todo = self.todoPop() | |
| 714 if not todo: | |
| 715 # Shortcut | |
| 716 if not isend: | |
| 717 self.emitEndTag(name) | |
| 718 return | |
| 719 | |
| 720 self.position = position = todo.get("position", (None, None)) | |
| 721 defineMacro = todo.get("defineMacro") | |
| 722 useMacro = todo.get("useMacro") | |
| 723 defineSlot = todo.get("defineSlot") | |
| 724 fillSlot = todo.get("fillSlot") | |
| 725 repeat = todo.get("repeat") | |
| 726 content = todo.get("content") | |
| 727 replace = todo.get("replace") | |
| 728 condition = todo.get("condition") | |
| 729 onError = todo.get("onError") | |
| 730 define = todo.get("define") | |
| 731 repldict = todo.get("repldict", {}) | |
| 732 scope = todo.get("scope") | |
| 733 optTag = todo.get("optional tag") | |
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734 msgid = todo.get('msgid') |
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735 i18ncontext = todo.get("i18ncontext") |
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736 varname = todo.get('i18nvar') |
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737 i18ndata = todo.get('i18ndata') |
| 1049 | 738 |
| 739 if implied > 0: | |
| 740 if defineMacro or useMacro or defineSlot or fillSlot: | |
| 741 exc = METALError | |
| 742 what = "METAL" | |
| 743 else: | |
| 744 exc = TALError | |
| 745 what = "TAL" | |
| 746 raise exc("%s attributes on <%s> require explicit </%s>" % | |
| 747 (what, name, name), position) | |
| 748 | |
|
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749 # If there's no tal:content or tal:replace in the tag with the |
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750 # i18n:name, tal:replace is the default. |
| 1049 | 751 if content: |
| 752 self.emitSubstitution(content, {}) | |
|
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753 # If we're looking at an implicit msgid, emit the insertTranslation |
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754 # opcode now, so that the end tag doesn't become part of the implicit |
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755 # msgid. If we're looking at an explicit msgid, it's better to emit |
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756 # the opcode after the i18nVariable opcode so we can better handle |
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757 # tags with both of them in them (and in the latter case, the contents |
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758 # would be thrown away for msgid purposes). |
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759 # |
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760 # Still, we should emit insertTranslation opcode before i18nVariable |
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761 # in case tal:content, i18n:translate and i18n:name in the same tag |
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762 if msgid is not None: |
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763 if (not varname) or ( |
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764 varname and (varname[1] == I18N_CONTENT)): |
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765 self.emitTranslation(msgid, i18ndata) |
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766 self.i18nLevel -= 1 |
| 1049 | 767 if optTag: |
| 768 self.emitOptTag(name, optTag, isend) | |
| 769 elif not isend: | |
|
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770 # If we're processing the end tag for a tag that contained |
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771 # i18n:name, we need to make sure that optimize() won't collect |
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772 # immediately following end tags into the same rawtextOffset, so |
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773 # put a spacer here that the optimizer will recognize. |
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774 if varname: |
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775 self.emit('noop') |
| 1049 | 776 self.emitEndTag(name) |
|
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777 # If i18n:name appeared in the same tag as tal:replace then we're |
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778 # going to do the substitution a little bit differently. The results |
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779 # of the expression go into the i18n substitution dictionary. |
| 1049 | 780 if replace: |
| 781 self.emitSubstitution(replace, repldict) | |
|
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782 elif varname: |
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783 # o varname[0] is the variable name |
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784 # o varname[1] is either |
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785 # - I18N_REPLACE for implicit tal:replace |
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786 # - I18N_CONTENT for tal:content |
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787 # - I18N_EXPRESSION for explicit tal:replace |
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788 # o varname[2] will be None for the first two actions and the |
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789 # replacement tal expression for the third action. |
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790 assert (varname[1] |
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791 in [I18N_REPLACE, I18N_CONTENT, I18N_EXPRESSION]) |
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792 self.emitI18nVariable(varname) |
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793 # Do not test for "msgid is not None", i.e. we only want to test for |
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794 # explicit msgids here. See comment above. |
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795 if msgid is not None: |
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796 # in case tal:content, i18n:translate and i18n:name in the |
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797 # same tag insertTranslation opcode has already been |
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798 # emitted |
|
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799 if varname and (varname[1] != I18N_CONTENT): |
|
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800 self.emitTranslation(msgid, i18ndata) |
| 1049 | 801 if repeat: |
| 802 self.emitRepeat(repeat) | |
| 803 if condition: | |
| 804 self.emitCondition(condition) | |
| 805 if onError: | |
|
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806 self.emitOnError(name, onError, optTag and optTag[1], isend) |
| 1049 | 807 if scope: |
| 808 self.emit("endScope") | |
|
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809 if i18ncontext: |
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810 self.emit("endI18nContext") |
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811 assert self.i18nContext.parent is not None |
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812 self.i18nContext = self.i18nContext.parent |
| 1049 | 813 if defineSlot: |
| 814 self.emitDefineSlot(defineSlot) | |
| 815 if fillSlot: | |
| 816 self.emitFillSlot(fillSlot) | |
| 817 if useMacro: | |
| 818 self.emitUseMacro(useMacro) | |
| 819 if defineMacro: | |
| 820 self.emitDefineMacro(defineMacro) | |
| 821 | |
|
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822 |
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823 def _parseI18nAttributes(i18nattrs, attrlist, repldict, position, |
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824 xml, source_file): |
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825 |
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826 def addAttribute(dic, attr, msgid, position, xml): |
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827 if not xml: |
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828 attr = attr.lower() |
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829 if attr in dic: |
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830 raise TALError( |
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831 "attribute may only be specified once in i18n:attributes: " |
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832 + attr, |
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833 position) |
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834 dic[attr] = msgid |
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835 |
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836 d = {} |
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837 if ';' in i18nattrs: |
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838 i18nattrlist = i18nattrs.split(';') |
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839 i18nattrlist = [attr.strip().split() |
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840 for attr in i18nattrlist if attr.strip()] |
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841 for parts in i18nattrlist: |
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842 if len(parts) > 2: |
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843 raise TALError("illegal i18n:attributes specification: %r" |
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844 % parts, position) |
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845 if len(parts) == 2: |
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846 attr, msgid = parts |
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847 else: |
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848 # len(parts) == 1 |
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849 attr = parts[0] |
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850 msgid = None |
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851 addAttribute(d, attr, msgid, position, xml) |
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852 else: |
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853 i18nattrlist = i18nattrs.split() |
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Richard Jones <richard@users.sourceforge.net>
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854 if len(i18nattrlist) == 2: |
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855 staticattrs = [attr[0] for attr in attrlist if len(attr) == 2] |
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856 if (not i18nattrlist[1] in staticattrs) and ( |
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8c2402a78bb0
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857 not i18nattrlist[1] in repldict): |
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858 attr, msgid = i18nattrlist |
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859 addAttribute(d, attr, msgid, position, xml) |
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860 else: |
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861 msgid = None |
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862 for attr in i18nattrlist: |
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863 addAttribute(d, attr, msgid, position, xml) |
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864 else: |
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865 msgid = None |
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866 for attr in i18nattrlist: |
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867 addAttribute(d, attr, msgid, position, xml) |
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868 return d |
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869 |
| 1049 | 870 def test(): |
| 871 t = TALGenerator() | |
| 872 t.pushProgram() | |
| 873 t.emit("bar") | |
| 874 p = t.popProgram() | |
| 875 t.emit("foo", p) | |
| 876 | |
| 877 if __name__ == "__main__": | |
| 878 test() |