Mercurial > p > roundup > code
annotate roundup/cgi/TAL/TALInterpreter.py @ 4796:f61bd780892e 1.5.0
Release preparation
| author | Ralf Schlatterbeck <rsc@runtux.com> |
|---|---|
| date | Sat, 06 Jul 2013 12:50:52 +0200 |
| parents | 8c2402a78bb0 |
| children | 12fe83f90f0d |
| rev | line source |
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| 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 ############################################################################## |
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14 # Modifications for Roundup: |
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15 # 1. implemented ustr as str |
| 1049 | 16 """ |
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17 Interpreter for a pre-compiled TAL program. |
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18 """ |
| 1049 | 19 |
| 20 import sys | |
| 21 import getopt | |
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22 import re |
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23 from types import ListType |
| 1049 | 24 from cgi import escape |
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25 # Do not use cStringIO here! It's not unicode aware. :( |
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26 from StringIO import StringIO |
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27 #from DocumentTemplate.DT_Util import ustr |
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28 ustr = str |
| 1049 | 29 |
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30 from TALDefs import TAL_VERSION, TALError, METALError, attrEscape |
| 1049 | 31 from TALDefs import isCurrentVersion, getProgramVersion, getProgramMode |
| 32 from TALGenerator import TALGenerator | |
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33 from TranslationContext import TranslationContext |
| 1049 | 34 |
| 35 BOOLEAN_HTML_ATTRS = [ | |
| 36 # List of Boolean attributes in HTML that should be rendered in | |
| 37 # minimized form (e.g. <img ismap> rather than <img ismap="">) | |
| 38 # From http://www.w3.org/TR/xhtml1/#guidelines (C.10) | |
| 39 # XXX The problem with this is that this is not valid XML and | |
| 40 # can't be parsed back! | |
| 41 "compact", "nowrap", "ismap", "declare", "noshade", "checked", | |
| 42 "disabled", "readonly", "multiple", "selected", "noresize", | |
| 43 "defer" | |
| 44 ] | |
| 45 | |
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46 def normalize(text): |
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47 # Now we need to normalize the whitespace in implicit message ids and |
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48 # implicit $name substitution values by stripping leading and trailing |
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49 # whitespace, and folding all internal whitespace to a single space. |
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50 return ' '.join(text.split()) |
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51 |
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52 |
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53 NAME_RE = r"[a-zA-Z][a-zA-Z0-9_]*" |
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54 _interp_regex = re.compile(r'(?<!\$)(\$(?:%(n)s|{%(n)s}))' %({'n': NAME_RE})) |
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55 _get_var_regex = re.compile(r'%(n)s' %({'n': NAME_RE})) |
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56 |
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57 def interpolate(text, mapping): |
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58 """Interpolate ${keyword} substitutions. |
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59 |
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60 This is called when no translation is provided by the translation |
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61 service. |
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62 """ |
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63 if not mapping: |
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64 return text |
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65 # Find all the spots we want to substitute. |
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66 to_replace = _interp_regex.findall(text) |
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67 # Now substitute with the variables in mapping. |
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68 for string in to_replace: |
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69 var = _get_var_regex.findall(string)[0] |
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70 if mapping.has_key(var): |
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71 # Call ustr because we may have an integer for instance. |
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72 subst = ustr(mapping[var]) |
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73 try: |
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74 text = text.replace(string, subst) |
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75 except UnicodeError: |
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76 # subst contains high-bit chars... |
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77 # As we have no way of knowing the correct encoding, |
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78 # substitue something instead of raising an exception. |
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79 subst = `subst`[1:-1] |
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80 text = text.replace(string, subst) |
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81 return text |
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82 |
| 1049 | 83 |
| 84 class AltTALGenerator(TALGenerator): | |
| 85 | |
| 86 def __init__(self, repldict, expressionCompiler=None, xml=0): | |
| 87 self.repldict = repldict | |
| 88 self.enabled = 1 | |
| 89 TALGenerator.__init__(self, expressionCompiler, xml) | |
| 90 | |
| 91 def enable(self, enabled): | |
| 92 self.enabled = enabled | |
| 93 | |
| 94 def emit(self, *args): | |
| 95 if self.enabled: | |
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96 TALGenerator.emit(self, *args) |
| 1049 | 97 |
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98 def emitStartElement(self, name, attrlist, taldict, metaldict, i18ndict, |
| 1049 | 99 position=(None, None), isend=0): |
| 100 metaldict = {} | |
| 101 taldict = {} | |
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102 i18ndict = {} |
| 1049 | 103 if self.enabled and self.repldict: |
| 104 taldict["attributes"] = "x x" | |
| 105 TALGenerator.emitStartElement(self, name, attrlist, | |
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106 taldict, metaldict, i18ndict, |
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107 position, isend) |
| 1049 | 108 |
| 109 def replaceAttrs(self, attrlist, repldict): | |
| 110 if self.enabled and self.repldict: | |
| 111 repldict = self.repldict | |
| 112 self.repldict = None | |
| 113 return TALGenerator.replaceAttrs(self, attrlist, repldict) | |
| 114 | |
| 115 | |
| 116 class TALInterpreter: | |
| 117 | |
| 118 def __init__(self, program, macros, engine, stream=None, | |
| 119 debug=0, wrap=60, metal=1, tal=1, showtal=-1, | |
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120 strictinsert=1, stackLimit=100, i18nInterpolate=1): |
| 1049 | 121 self.program = program |
| 122 self.macros = macros | |
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123 self.engine = engine # Execution engine (aka context) |
| 1049 | 124 self.Default = engine.getDefault() |
| 125 self.stream = stream or sys.stdout | |
| 126 self._stream_write = self.stream.write | |
| 127 self.debug = debug | |
| 128 self.wrap = wrap | |
| 129 self.metal = metal | |
| 130 self.tal = tal | |
| 131 if tal: | |
| 132 self.dispatch = self.bytecode_handlers_tal | |
| 133 else: | |
| 134 self.dispatch = self.bytecode_handlers | |
| 135 assert showtal in (-1, 0, 1) | |
| 136 if showtal == -1: | |
| 137 showtal = (not tal) | |
| 138 self.showtal = showtal | |
| 139 self.strictinsert = strictinsert | |
| 140 self.stackLimit = stackLimit | |
| 141 self.html = 0 | |
| 142 self.endsep = "/>" | |
| 143 self.endlen = len(self.endsep) | |
| 144 self.macroStack = [] | |
| 145 self.position = None, None # (lineno, offset) | |
| 146 self.col = 0 | |
| 147 self.level = 0 | |
| 148 self.scopeLevel = 0 | |
| 149 self.sourceFile = None | |
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150 self.i18nStack = [] |
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151 self.i18nInterpolate = i18nInterpolate |
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152 self.i18nContext = TranslationContext() |
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153 |
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154 def StringIO(self): |
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155 # Third-party products wishing to provide a full Unicode-aware |
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156 # StringIO can do so by monkey-patching this method. |
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157 return FasterStringIO() |
| 1049 | 158 |
| 159 def saveState(self): | |
| 160 return (self.position, self.col, self.stream, | |
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161 self.scopeLevel, self.level, self.i18nContext) |
| 1049 | 162 |
| 163 def restoreState(self, state): | |
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164 (self.position, self.col, self.stream, scopeLevel, level, i18n) = state |
| 1049 | 165 self._stream_write = self.stream.write |
| 166 assert self.level == level | |
| 167 while self.scopeLevel > scopeLevel: | |
| 168 self.engine.endScope() | |
| 169 self.scopeLevel = self.scopeLevel - 1 | |
| 170 self.engine.setPosition(self.position) | |
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171 self.i18nContext = i18n |
| 1049 | 172 |
| 173 def restoreOutputState(self, state): | |
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174 (dummy, self.col, self.stream, scopeLevel, level, i18n) = state |
| 1049 | 175 self._stream_write = self.stream.write |
| 176 assert self.level == level | |
| 177 assert self.scopeLevel == scopeLevel | |
| 178 | |
| 179 def pushMacro(self, macroName, slots, entering=1): | |
| 180 if len(self.macroStack) >= self.stackLimit: | |
| 181 raise METALError("macro nesting limit (%d) exceeded " | |
| 182 "by %s" % (self.stackLimit, `macroName`)) | |
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183 self.macroStack.append([macroName, slots, entering, self.i18nContext]) |
| 1049 | 184 |
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185 def popMacro(self): |
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186 return self.macroStack.pop() |
| 1049 | 187 |
| 188 def __call__(self): | |
| 189 assert self.level == 0 | |
| 190 assert self.scopeLevel == 0 | |
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191 assert self.i18nContext.parent is None |
| 1049 | 192 self.interpret(self.program) |
| 193 assert self.level == 0 | |
| 194 assert self.scopeLevel == 0 | |
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195 assert self.i18nContext.parent is None |
| 1049 | 196 if self.col > 0: |
| 197 self._stream_write("\n") | |
| 198 self.col = 0 | |
| 199 | |
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200 def stream_write(self, s, |
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201 len=len): |
| 1049 | 202 self._stream_write(s) |
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203 i = s.rfind('\n') |
| 1049 | 204 if i < 0: |
| 205 self.col = self.col + len(s) | |
| 206 else: | |
| 207 self.col = len(s) - (i + 1) | |
| 208 | |
| 209 bytecode_handlers = {} | |
| 210 | |
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211 def interpretWithStream(self, program, stream): |
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212 oldstream = self.stream |
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213 self.stream = stream |
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214 self._stream_write = stream.write |
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215 try: |
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216 self.interpret(program) |
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217 finally: |
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218 self.stream = oldstream |
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219 self._stream_write = oldstream.write |
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220 |
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221 def interpret(self, program): |
| 1049 | 222 oldlevel = self.level |
| 223 self.level = oldlevel + 1 | |
| 224 handlers = self.dispatch | |
| 225 try: | |
| 226 if self.debug: | |
| 227 for (opcode, args) in program: | |
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228 s = "%sdo_%s(%s)\n" % (" "*self.level, opcode, |
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229 repr(args)) |
| 1049 | 230 if len(s) > 80: |
| 231 s = s[:76] + "...\n" | |
| 232 sys.stderr.write(s) | |
| 233 handlers[opcode](self, args) | |
| 234 else: | |
| 235 for (opcode, args) in program: | |
| 236 handlers[opcode](self, args) | |
| 237 finally: | |
| 238 self.level = oldlevel | |
| 239 | |
| 240 def do_version(self, version): | |
| 241 assert version == TAL_VERSION | |
| 242 bytecode_handlers["version"] = do_version | |
| 243 | |
| 244 def do_mode(self, mode): | |
| 245 assert mode in ("html", "xml") | |
| 246 self.html = (mode == "html") | |
| 247 if self.html: | |
| 248 self.endsep = " />" | |
| 249 else: | |
| 250 self.endsep = "/>" | |
| 251 self.endlen = len(self.endsep) | |
| 252 bytecode_handlers["mode"] = do_mode | |
| 253 | |
| 254 def do_setSourceFile(self, source_file): | |
| 255 self.sourceFile = source_file | |
| 256 self.engine.setSourceFile(source_file) | |
| 257 bytecode_handlers["setSourceFile"] = do_setSourceFile | |
| 258 | |
| 259 def do_setPosition(self, position): | |
| 260 self.position = position | |
| 261 self.engine.setPosition(position) | |
| 262 bytecode_handlers["setPosition"] = do_setPosition | |
| 263 | |
| 264 def do_startEndTag(self, stuff): | |
| 265 self.do_startTag(stuff, self.endsep, self.endlen) | |
| 266 bytecode_handlers["startEndTag"] = do_startEndTag | |
| 267 | |
| 268 def do_startTag(self, (name, attrList), | |
| 269 end=">", endlen=1, _len=len): | |
| 270 # The bytecode generator does not cause calls to this method | |
| 271 # for start tags with no attributes; those are optimized down | |
| 272 # to rawtext events. Hence, there is no special "fast path" | |
| 273 # for that case. | |
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274 L = ["<", name] |
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275 append = L.append |
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276 col = self.col + _len(name) + 1 |
| 1049 | 277 wrap = self.wrap |
| 278 align = col + 1 | |
| 279 if align >= wrap/2: | |
| 280 align = 4 # Avoid a narrow column far to the right | |
| 281 attrAction = self.dispatch["<attrAction>"] | |
| 282 try: | |
| 283 for item in attrList: | |
| 284 if _len(item) == 2: | |
| 285 name, s = item | |
| 286 else: | |
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287 # item[2] is the 'action' field: |
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288 if item[2] in ('metal', 'tal', 'xmlns', 'i18n'): |
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289 if not self.showtal: |
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290 continue |
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291 ok, name, s = self.attrAction(item) |
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292 else: |
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293 ok, name, s = attrAction(self, item) |
| 1049 | 294 if not ok: |
| 295 continue | |
| 296 slen = _len(s) | |
| 297 if (wrap and | |
| 298 col >= align and | |
| 299 col + 1 + slen > wrap): | |
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300 append("\n") |
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301 append(" "*align) |
| 1049 | 302 col = align + slen |
| 303 else: | |
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304 append(" ") |
| 1049 | 305 col = col + 1 + slen |
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306 append(s) |
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307 append(end) |
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308 self._stream_write("".join(L)) |
| 1049 | 309 col = col + endlen |
| 310 finally: | |
| 311 self.col = col | |
| 312 bytecode_handlers["startTag"] = do_startTag | |
| 313 | |
| 314 def attrAction(self, item): | |
| 315 name, value, action = item[:3] | |
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316 if action == 'insert': |
| 1049 | 317 return 0, name, value |
| 318 macs = self.macroStack | |
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319 if action == 'metal' and self.metal and macs: |
| 1049 | 320 if len(macs) > 1 or not macs[-1][2]: |
| 321 # Drop all METAL attributes at a use-depth above one. | |
| 322 return 0, name, value | |
| 323 # Clear 'entering' flag | |
| 324 macs[-1][2] = 0 | |
| 325 # Convert or drop depth-one METAL attributes. | |
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326 i = name.rfind(":") + 1 |
| 1049 | 327 prefix, suffix = name[:i], name[i:] |
| 328 if suffix == "define-macro": | |
| 329 # Convert define-macro as we enter depth one. | |
| 330 name = prefix + "use-macro" | |
| 331 value = macs[-1][0] # Macro name | |
| 332 elif suffix == "define-slot": | |
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333 name = prefix + "fill-slot" |
| 1049 | 334 elif suffix == "fill-slot": |
| 335 pass | |
| 336 else: | |
| 337 return 0, name, value | |
| 338 | |
| 339 if value is None: | |
| 340 value = name | |
| 341 else: | |
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342 value = '%s="%s"' % (name, attrEscape(value)) |
| 1049 | 343 return 1, name, value |
| 344 | |
| 345 def attrAction_tal(self, item): | |
| 346 name, value, action = item[:3] | |
| 347 ok = 1 | |
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348 expr, xlat, msgid = item[3:] |
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349 if self.html and name.lower() in BOOLEAN_HTML_ATTRS: |
| 1049 | 350 evalue = self.engine.evaluateBoolean(item[3]) |
| 351 if evalue is self.Default: | |
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352 if action == 'insert': # Cancelled insert |
| 1049 | 353 ok = 0 |
| 354 elif evalue: | |
| 355 value = None | |
| 356 else: | |
| 357 ok = 0 | |
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358 elif expr is not None: |
| 1049 | 359 evalue = self.engine.evaluateText(item[3]) |
| 360 if evalue is self.Default: | |
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361 if action == 'insert': # Cancelled insert |
| 1049 | 362 ok = 0 |
| 363 else: | |
| 364 if evalue is None: | |
| 365 ok = 0 | |
| 366 value = evalue | |
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367 else: |
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368 evalue = None |
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369 |
| 1049 | 370 if ok: |
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371 if xlat: |
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372 translated = self.translate(msgid or value, value, {}) |
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373 if translated is not None: |
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374 value = translated |
| 1049 | 375 if value is None: |
| 376 value = name | |
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377 elif evalue is self.Default: |
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378 value = attrEscape(value) |
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379 else: |
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380 value = escape(value, quote=1) |
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381 value = '%s="%s"' % (name, value) |
| 1049 | 382 return ok, name, value |
| 383 bytecode_handlers["<attrAction>"] = attrAction | |
| 384 | |
| 385 def no_tag(self, start, program): | |
| 386 state = self.saveState() | |
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387 self.stream = stream = self.StringIO() |
| 1049 | 388 self._stream_write = stream.write |
| 389 self.interpret(start) | |
| 390 self.restoreOutputState(state) | |
| 391 self.interpret(program) | |
| 392 | |
| 393 def do_optTag(self, (name, cexpr, tag_ns, isend, start, program), | |
| 394 omit=0): | |
| 395 if tag_ns and not self.showtal: | |
| 396 return self.no_tag(start, program) | |
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397 |
| 1049 | 398 self.interpret(start) |
| 399 if not isend: | |
| 400 self.interpret(program) | |
| 401 s = '</%s>' % name | |
| 402 self._stream_write(s) | |
| 403 self.col = self.col + len(s) | |
| 404 | |
| 405 def do_optTag_tal(self, stuff): | |
| 406 cexpr = stuff[1] | |
| 407 if cexpr is not None and (cexpr == '' or | |
| 408 self.engine.evaluateBoolean(cexpr)): | |
| 409 self.no_tag(stuff[-2], stuff[-1]) | |
| 410 else: | |
| 411 self.do_optTag(stuff) | |
| 412 bytecode_handlers["optTag"] = do_optTag | |
| 413 | |
| 414 def do_rawtextBeginScope(self, (s, col, position, closeprev, dict)): | |
| 415 self._stream_write(s) | |
| 416 self.col = col | |
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417 self.position = position |
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418 self.engine.setPosition(position) |
| 1049 | 419 if closeprev: |
| 420 engine = self.engine | |
| 421 engine.endScope() | |
| 422 engine.beginScope() | |
| 423 else: | |
| 424 self.engine.beginScope() | |
| 425 self.scopeLevel = self.scopeLevel + 1 | |
| 426 | |
| 427 def do_rawtextBeginScope_tal(self, (s, col, position, closeprev, dict)): | |
| 428 self._stream_write(s) | |
| 429 self.col = col | |
| 430 engine = self.engine | |
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431 self.position = position |
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432 engine.setPosition(position) |
| 1049 | 433 if closeprev: |
| 434 engine.endScope() | |
| 435 engine.beginScope() | |
| 436 else: | |
| 437 engine.beginScope() | |
| 438 self.scopeLevel = self.scopeLevel + 1 | |
| 439 engine.setLocal("attrs", dict) | |
| 440 bytecode_handlers["rawtextBeginScope"] = do_rawtextBeginScope | |
| 441 | |
| 442 def do_beginScope(self, dict): | |
| 443 self.engine.beginScope() | |
| 444 self.scopeLevel = self.scopeLevel + 1 | |
| 445 | |
| 446 def do_beginScope_tal(self, dict): | |
| 447 engine = self.engine | |
| 448 engine.beginScope() | |
| 449 engine.setLocal("attrs", dict) | |
| 450 self.scopeLevel = self.scopeLevel + 1 | |
| 451 bytecode_handlers["beginScope"] = do_beginScope | |
| 452 | |
| 453 def do_endScope(self, notused=None): | |
| 454 self.engine.endScope() | |
| 455 self.scopeLevel = self.scopeLevel - 1 | |
| 456 bytecode_handlers["endScope"] = do_endScope | |
| 457 | |
| 458 def do_setLocal(self, notused): | |
| 459 pass | |
| 460 | |
| 461 def do_setLocal_tal(self, (name, expr)): | |
| 462 self.engine.setLocal(name, self.engine.evaluateValue(expr)) | |
| 463 bytecode_handlers["setLocal"] = do_setLocal | |
| 464 | |
| 465 def do_setGlobal_tal(self, (name, expr)): | |
| 466 self.engine.setGlobal(name, self.engine.evaluateValue(expr)) | |
| 467 bytecode_handlers["setGlobal"] = do_setLocal | |
| 468 | |
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469 def do_beginI18nContext(self, settings): |
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470 get = settings.get |
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471 self.i18nContext = TranslationContext(self.i18nContext, |
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472 domain=get("domain"), |
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473 source=get("source"), |
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474 target=get("target")) |
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475 bytecode_handlers["beginI18nContext"] = do_beginI18nContext |
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476 |
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477 def do_endI18nContext(self, notused=None): |
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478 self.i18nContext = self.i18nContext.parent |
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479 assert self.i18nContext is not None |
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480 bytecode_handlers["endI18nContext"] = do_endI18nContext |
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481 |
| 1049 | 482 def do_insertText(self, stuff): |
| 483 self.interpret(stuff[1]) | |
| 484 | |
| 485 def do_insertText_tal(self, stuff): | |
| 486 text = self.engine.evaluateText(stuff[0]) | |
| 487 if text is None: | |
| 488 return | |
| 489 if text is self.Default: | |
| 490 self.interpret(stuff[1]) | |
| 491 return | |
| 492 s = escape(text) | |
| 493 self._stream_write(s) | |
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494 i = s.rfind('\n') |
| 1049 | 495 if i < 0: |
| 496 self.col = self.col + len(s) | |
| 497 else: | |
| 498 self.col = len(s) - (i + 1) | |
| 499 bytecode_handlers["insertText"] = do_insertText | |
| 500 | |
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501 def do_i18nVariable(self, stuff): |
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502 varname, program, expression = stuff |
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503 if expression is None: |
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504 # The value is implicitly the contents of this tag, so we have to |
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505 # evaluate the mini-program to get the value of the variable. |
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506 state = self.saveState() |
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507 try: |
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508 tmpstream = self.StringIO() |
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509 self.interpretWithStream(program, tmpstream) |
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510 value = normalize(tmpstream.getvalue()) |
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511 finally: |
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512 self.restoreState(state) |
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513 else: |
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514 # Evaluate the value to be associated with the variable in the |
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515 # i18n interpolation dictionary. |
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516 value = self.engine.evaluate(expression) |
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517 # Either the i18n:name tag is nested inside an i18n:translate in which |
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518 # case the last item on the stack has the i18n dictionary and string |
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519 # representation, or the i18n:name and i18n:translate attributes are |
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520 # in the same tag, in which case the i18nStack will be empty. In that |
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521 # case we can just output the ${name} to the stream |
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522 i18ndict, srepr = self.i18nStack[-1] |
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523 i18ndict[varname] = value |
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524 placeholder = '${%s}' % varname |
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525 srepr.append(placeholder) |
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526 self._stream_write(placeholder) |
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527 bytecode_handlers['i18nVariable'] = do_i18nVariable |
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528 |
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529 def do_insertTranslation(self, stuff): |
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530 i18ndict = {} |
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531 srepr = [] |
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532 obj = None |
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533 self.i18nStack.append((i18ndict, srepr)) |
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534 msgid = stuff[0] |
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535 # We need to evaluate the content of the tag because that will give us |
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536 # several useful pieces of information. First, the contents will |
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537 # include an implicit message id, if no explicit one was given. |
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538 # Second, it will evaluate any i18nVariable definitions in the body of |
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539 # the translation (necessary for $varname substitutions). |
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540 # |
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541 # Use a temporary stream to capture the interpretation of the |
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542 # subnodes, which should /not/ go to the output stream. |
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543 tmpstream = self.StringIO() |
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544 self.interpretWithStream(stuff[1], tmpstream) |
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545 default = tmpstream.getvalue() |
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546 # We only care about the evaluated contents if we need an implicit |
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547 # message id. All other useful information will be in the i18ndict on |
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548 # the top of the i18nStack. |
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549 if msgid == '': |
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550 msgid = normalize(default) |
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551 self.i18nStack.pop() |
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552 # See if there is was an i18n:data for msgid |
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553 if len(stuff) > 2: |
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554 obj = self.engine.evaluate(stuff[2]) |
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555 xlated_msgid = self.translate(msgid, default, i18ndict, obj) |
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556 assert xlated_msgid is not None, self.position |
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557 self._stream_write(xlated_msgid) |
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558 bytecode_handlers['insertTranslation'] = do_insertTranslation |
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559 |
| 1049 | 560 def do_insertStructure(self, stuff): |
| 561 self.interpret(stuff[2]) | |
| 562 | |
| 563 def do_insertStructure_tal(self, (expr, repldict, block)): | |
| 564 structure = self.engine.evaluateStructure(expr) | |
| 565 if structure is None: | |
| 566 return | |
| 567 if structure is self.Default: | |
| 568 self.interpret(block) | |
| 569 return | |
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570 text = ustr(structure) |
| 1049 | 571 if not (repldict or self.strictinsert): |
| 572 # Take a shortcut, no error checking | |
| 573 self.stream_write(text) | |
| 574 return | |
| 575 if self.html: | |
| 576 self.insertHTMLStructure(text, repldict) | |
| 577 else: | |
| 578 self.insertXMLStructure(text, repldict) | |
| 579 bytecode_handlers["insertStructure"] = do_insertStructure | |
| 580 | |
| 581 def insertHTMLStructure(self, text, repldict): | |
| 582 from HTMLTALParser import HTMLTALParser | |
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583 gen = AltTALGenerator(repldict, self.engine.getCompiler(), 0) |
| 1049 | 584 p = HTMLTALParser(gen) # Raises an exception if text is invalid |
| 585 p.parseString(text) | |
| 586 program, macros = p.getCode() | |
| 587 self.interpret(program) | |
| 588 | |
| 589 def insertXMLStructure(self, text, repldict): | |
| 590 from TALParser import TALParser | |
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591 gen = AltTALGenerator(repldict, self.engine.getCompiler(), 0) |
| 1049 | 592 p = TALParser(gen) |
| 593 gen.enable(0) | |
| 594 p.parseFragment('<!DOCTYPE foo PUBLIC "foo" "bar"><foo>') | |
| 595 gen.enable(1) | |
| 596 p.parseFragment(text) # Raises an exception if text is invalid | |
| 597 gen.enable(0) | |
| 598 p.parseFragment('</foo>', 1) | |
| 599 program, macros = gen.getCode() | |
| 600 self.interpret(program) | |
| 601 | |
| 602 def do_loop(self, (name, expr, block)): | |
| 603 self.interpret(block) | |
| 604 | |
| 605 def do_loop_tal(self, (name, expr, block)): | |
| 606 iterator = self.engine.setRepeat(name, expr) | |
| 607 while iterator.next(): | |
| 608 self.interpret(block) | |
| 609 bytecode_handlers["loop"] = do_loop | |
| 610 | |
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611 def translate(self, msgid, default, i18ndict, obj=None): |
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612 if obj: |
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613 i18ndict.update(obj) |
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614 if not self.i18nInterpolate: |
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615 return msgid |
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616 # XXX We need to pass in one of context or target_language |
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617 return self.engine.translate(self.i18nContext.domain, |
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618 msgid, i18ndict, default=default) |
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619 |
| 1049 | 620 def do_rawtextColumn(self, (s, col)): |
| 621 self._stream_write(s) | |
| 622 self.col = col | |
| 623 bytecode_handlers["rawtextColumn"] = do_rawtextColumn | |
| 624 | |
| 625 def do_rawtextOffset(self, (s, offset)): | |
| 626 self._stream_write(s) | |
| 627 self.col = self.col + offset | |
| 628 bytecode_handlers["rawtextOffset"] = do_rawtextOffset | |
| 629 | |
| 630 def do_condition(self, (condition, block)): | |
| 631 if not self.tal or self.engine.evaluateBoolean(condition): | |
| 632 self.interpret(block) | |
| 633 bytecode_handlers["condition"] = do_condition | |
| 634 | |
| 635 def do_defineMacro(self, (macroName, macro)): | |
| 636 macs = self.macroStack | |
| 637 if len(macs) == 1: | |
| 638 entering = macs[-1][2] | |
| 639 if not entering: | |
| 640 macs.append(None) | |
| 641 self.interpret(macro) | |
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642 assert macs[-1] is None |
| 1049 | 643 macs.pop() |
| 644 return | |
| 645 self.interpret(macro) | |
| 646 bytecode_handlers["defineMacro"] = do_defineMacro | |
| 647 | |
| 648 def do_useMacro(self, (macroName, macroExpr, compiledSlots, block)): | |
| 649 if not self.metal: | |
| 650 self.interpret(block) | |
| 651 return | |
| 652 macro = self.engine.evaluateMacro(macroExpr) | |
| 653 if macro is self.Default: | |
| 654 macro = block | |
| 655 else: | |
| 656 if not isCurrentVersion(macro): | |
| 657 raise METALError("macro %s has incompatible version %s" % | |
| 658 (`macroName`, `getProgramVersion(macro)`), | |
| 659 self.position) | |
| 660 mode = getProgramMode(macro) | |
| 661 if mode != (self.html and "html" or "xml"): | |
| 662 raise METALError("macro %s has incompatible mode %s" % | |
| 663 (`macroName`, `mode`), self.position) | |
| 664 self.pushMacro(macroName, compiledSlots) | |
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665 prev_source = self.sourceFile |
| 1049 | 666 self.interpret(macro) |
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667 if self.sourceFile != prev_source: |
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668 self.engine.setSourceFile(prev_source) |
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669 self.sourceFile = prev_source |
| 1049 | 670 self.popMacro() |
| 671 bytecode_handlers["useMacro"] = do_useMacro | |
| 672 | |
| 673 def do_fillSlot(self, (slotName, block)): | |
| 674 # This is only executed if the enclosing 'use-macro' evaluates | |
| 675 # to 'default'. | |
| 676 self.interpret(block) | |
| 677 bytecode_handlers["fillSlot"] = do_fillSlot | |
| 678 | |
| 679 def do_defineSlot(self, (slotName, block)): | |
| 680 if not self.metal: | |
| 681 self.interpret(block) | |
| 682 return | |
| 683 macs = self.macroStack | |
| 684 if macs and macs[-1] is not None: | |
| 685 macroName, slots = self.popMacro()[:2] | |
| 686 slot = slots.get(slotName) | |
| 687 if slot is not None: | |
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688 prev_source = self.sourceFile |
| 1049 | 689 self.interpret(slot) |
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690 if self.sourceFile != prev_source: |
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691 self.engine.setSourceFile(prev_source) |
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692 self.sourceFile = prev_source |
| 1049 | 693 self.pushMacro(macroName, slots, entering=0) |
| 694 return | |
| 695 self.pushMacro(macroName, slots) | |
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696 # Falling out of the 'if' allows the macro to be interpreted. |
| 1049 | 697 self.interpret(block) |
| 698 bytecode_handlers["defineSlot"] = do_defineSlot | |
| 699 | |
| 700 def do_onError(self, (block, handler)): | |
| 701 self.interpret(block) | |
| 702 | |
| 703 def do_onError_tal(self, (block, handler)): | |
| 704 state = self.saveState() | |
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705 self.stream = stream = self.StringIO() |
| 1049 | 706 self._stream_write = stream.write |
| 707 try: | |
| 708 self.interpret(block) | |
| 709 except: | |
| 710 exc = sys.exc_info()[1] | |
| 711 self.restoreState(state) | |
| 712 engine = self.engine | |
| 713 engine.beginScope() | |
| 714 error = engine.createErrorInfo(exc, self.position) | |
| 715 engine.setLocal('error', error) | |
| 716 try: | |
| 717 self.interpret(handler) | |
| 718 finally: | |
| 719 engine.endScope() | |
| 720 else: | |
| 721 self.restoreOutputState(state) | |
| 722 self.stream_write(stream.getvalue()) | |
| 723 bytecode_handlers["onError"] = do_onError | |
| 724 | |
| 725 bytecode_handlers_tal = bytecode_handlers.copy() | |
| 726 bytecode_handlers_tal["rawtextBeginScope"] = do_rawtextBeginScope_tal | |
| 727 bytecode_handlers_tal["beginScope"] = do_beginScope_tal | |
| 728 bytecode_handlers_tal["setLocal"] = do_setLocal_tal | |
| 729 bytecode_handlers_tal["setGlobal"] = do_setGlobal_tal | |
| 730 bytecode_handlers_tal["insertStructure"] = do_insertStructure_tal | |
| 731 bytecode_handlers_tal["insertText"] = do_insertText_tal | |
| 732 bytecode_handlers_tal["loop"] = do_loop_tal | |
| 733 bytecode_handlers_tal["onError"] = do_onError_tal | |
| 734 bytecode_handlers_tal["<attrAction>"] = attrAction_tal | |
| 735 bytecode_handlers_tal["optTag"] = do_optTag_tal | |
| 736 | |
| 737 | |
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738 class FasterStringIO(StringIO): |
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739 """Append-only version of StringIO. |
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parents:
2005
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740 |
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parents:
2005
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741 This let's us have a much faster write() method. |
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parents:
2005
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742 """ |
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parents:
2005
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743 def close(self): |
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parents:
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744 if not self.closed: |
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Richard Jones <richard@users.sourceforge.net>
parents:
2005
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745 self.write = _write_ValueError |
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parents:
2005
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746 StringIO.close(self) |
| 1049 | 747 |
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2348
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748 def seek(self, pos, mode=0): |
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749 raise RuntimeError("FasterStringIO.seek() not allowed") |
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parents:
2005
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750 |
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parents:
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751 def write(self, s): |
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parents:
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752 #assert self.pos == self.len |
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753 self.buflist.append(s) |
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parents:
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754 self.len = self.pos = self.pos + len(s) |
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Richard Jones <richard@users.sourceforge.net>
parents:
2005
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755 |
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parents:
2005
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756 |
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parents:
2005
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757 def _write_ValueError(s): |
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758 raise ValueError, "I/O operation on closed file" |