pyx/text.py

   1 # -*- encoding: utf-8 -*-
   2 #
   3 #
   4 # Copyright (C) 2002-2004 Jörg Lehmann <joergl@users.sourceforge.net>
   5 # Copyright (C) 2003-2011 Michael Schindler <m-schindler@users.sourceforge.net>
   6 # Copyright (C) 2002-2011 André Wobst <wobsta@users.sourceforge.net>
   7 #
   8 # This file is part of PyX (http://pyx.sourceforge.net/).
   9 #
  10 # PyX is free software; you can redistribute it and/or modify
  11 # it under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 2 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # PyX is distributed in the hope that it will be useful,
  16 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with PyX; if not, write to the Free Software
  22 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  23
  24 import errno, glob, os, threading, Queue, re, tempfile, atexit, time, warnings
  25 import config, unit, box, canvas, trafo, version, attr, style, filelocator, pycompat
  26 from pyx.dvi import dvifile
  27 import bbox as bboxmodule
  28
  29 class PyXTeXWarning(UserWarning): pass
  30 warnings.filterwarnings('always', category=PyXTeXWarning)
  31
  32 ###############################################################################
  33 # texmessages
  34 # - please don't get confused:
  35 #   - there is a texmessage (and a texmessageparsed) attribute within the
  36 #     texrunner; it contains TeX/LaTeX response from the last command execution
  37 #   - instances of classes derived from the class texmessage are used to
  38 #     parse the TeX/LaTeX response as it is stored in the texmessageparsed
  39 #     attribute of a texrunner instance
  40 #   - the multiple usage of the name texmessage might be removed in the future
  41 # - texmessage instances should implement _Itexmessage
  42 ###############################################################################
  43
  44 class TexResultError(RuntimeError):
  45     """specialized texrunner exception class
  46     - it is raised by texmessage instances, when a texmessage indicates an error
  47     - it is raised by the texrunner itself, whenever there is a texmessage left
  48       after all parsing of this message (by texmessage instances)
  49     prints a detailed report about the problem
  50     - the verbose level is controlled by texrunner.errordebug"""
  51
  52     def __init__(self, description, texrunner):
  53         if texrunner.errordebug >= 2:
  54             self.description = ("%s\n" % description +
  55                                 "The expression passed to TeX was:\n"
  56                                 "  %s\n" % texrunner.expr.replace("\n", "\n  ").rstrip() +
  57                                 "The return message from TeX was:\n"
  58                                 "  %s\n" % texrunner.texmessage.replace("\n", "\n  ").rstrip() +
  59                                 "After parsing this message, the following was left:\n"
  60                                 "  %s" % texrunner.texmessageparsed.replace("\n", "\n  ").rstrip())
  61         elif texrunner.errordebug == 1:
  62             firstlines = texrunner.texmessageparsed.split("\n")
  63             if len(firstlines) > 5:
  64                 firstlines = firstlines[:5] + ["(cut after 5 lines, increase errordebug for more output)"]
  65             self.description = ("%s\n" % description +
  66                                 "The expression passed to TeX was:\n"
  67                                 "  %s\n" % texrunner.expr.replace("\n", "\n  ").rstrip() +
  68                                 "After parsing the return message from TeX, the following was left:\n" +
  69                                 reduce(lambda x, y: "%s  %s\n" % (x,y), firstlines, "").rstrip())
  70         else:
  71             self.description = description
  72
  73     def __str__(self):
  74         return self.description
  75
  76
  77 class _Itexmessage:
  78     """validates/invalidates TeX/LaTeX response"""
  79
  80     def check(self, texrunner):
  81         """check a Tex/LaTeX response and respond appropriate
  82         - read the texrunners texmessageparsed attribute
  83         - if there is an problem found, raise TexResultError
  84         - remove any valid and identified TeX/LaTeX response
  85           from the texrunners texmessageparsed attribute
  86           -> finally, there should be nothing left in there,
  87              otherwise it is interpreted as an error"""
  88
  89
  90 class texmessage(attr.attr): pass
  91
  92
  93 class _texmessagestart(texmessage):
  94     """validates TeX/LaTeX startup"""
  95
  96     __implements__ = _Itexmessage
  97
  98     startpattern = re.compile(r"This is [-0-9a-zA-Z\s_]*TeX")
  99
 100     def check(self, texrunner):
 101         # check for "This is e-TeX"
 102         m = self.startpattern.search(texrunner.texmessageparsed)
 103         if not m:
 104             raise TexResultError("TeX startup failed", texrunner)
 105         texrunner.texmessageparsed = texrunner.texmessageparsed[m.end():]
 106
 107         # check for \raiseerror -- just to be sure that communication works
 108         try:
 109             texrunner.texmessageparsed = texrunner.texmessageparsed.split("*! Undefined control sequence.\n<*> \\raiseerror\n               %\n", 1)[1]
 110         except (IndexError, ValueError):
 111             raise TexResultError("TeX scrollmode check failed", texrunner)
 112
 113
 114 class _texmessagenofile(texmessage):
 115     """allows for LaTeXs no-file warning"""
 116
 117     __implements__ = _Itexmessage
 118
 119     def __init__(self, fileending):
 120         self.fileending = fileending
 121
 122     def check(self, texrunner):
 123         try:
 124             s1, s2 = texrunner.texmessageparsed.split("No file %s.%s." % (texrunner.texfilename, self.fileending), 1)
 125             texrunner.texmessageparsed = s1 + s2
 126         except (IndexError, ValueError):
 127             try:
 128                 s1, s2 = texrunner.texmessageparsed.split("No file %s%s%s.%s." % (os.curdir,
 129                                                                                    os.sep,
 130                                                                                    texrunner.texfilename,
 131                                                                                    self.fileending), 1)
 132                 texrunner.texmessageparsed = s1 + s2
 133             except (IndexError, ValueError):
 134                 pass
 135
 136
 137 class _texmessageinputmarker(texmessage):
 138     """validates the PyXInputMarker"""
 139
 140     __implements__ = _Itexmessage
 141
 142     def check(self, texrunner):
 143         try:
 144             s1, s2 = texrunner.texmessageparsed.split("PyXInputMarker:executeid=%s:" % texrunner.executeid, 1)
 145             texrunner.texmessageparsed = s1 + s2
 146         except (IndexError, ValueError):
 147             raise TexResultError("PyXInputMarker expected", texrunner)
 148
 149
 150 class _texmessagepyxbox(texmessage):
 151     """validates the PyXBox output"""
 152
 153     __implements__ = _Itexmessage
 154
 155     pattern = re.compile(r"PyXBox:page=(?P<page>\d+),lt=-?\d*((\d\.?)|(\.?\d))\d*pt,rt=-?\d*((\d\.?)|(\.?\d))\d*pt,ht=-?\d*((\d\.?)|(\.?\d))\d*pt,dp=-?\d*((\d\.?)|(\.?\d))\d*pt:")
 156
 157     def check(self, texrunner):
 158         m = self.pattern.search(texrunner.texmessageparsed)
 159         if m and m.group("page") == str(texrunner.page):
 160             texrunner.texmessageparsed = texrunner.texmessageparsed[:m.start()] + texrunner.texmessageparsed[m.end():]
 161         else:
 162             raise TexResultError("PyXBox expected", texrunner)
 163
 164
 165 class _texmessagepyxpageout(texmessage):
 166     """validates the dvi shipout message (writing a page to the dvi file)"""
 167
 168     __implements__ = _Itexmessage
 169
 170     def check(self, texrunner):
 171         try:
 172             s1, s2 = texrunner.texmessageparsed.split("[80.121.88.%s]" % texrunner.page, 1)
 173             texrunner.texmessageparsed = s1 + s2
 174         except (IndexError, ValueError):
 175             raise TexResultError("PyXPageOutMarker expected", texrunner)
 176
 177
 178 class _texmessageend(texmessage):
 179     """validates TeX/LaTeX finish"""
 180
 181     __implements__ = _Itexmessage
 182
 183     auxPattern = re.compile(r"\(([^()]+\.aux|\"[^\"]+\.aux\")\)")
 184
 185     def check(self, texrunner):
 186         m = self.auxPattern.search(texrunner.texmessageparsed)
 187         if m:
 188             texrunner.texmessageparsed = (texrunner.texmessageparsed[:m.start()] + texrunner.texmessageparsed[m.end():]).strip()
 189
 190         # check for "(see the transcript file for additional information)"
 191         try:
 192             s1, s2 = texrunner.texmessageparsed.split("(see the transcript file for additional information)", 1)
 193             texrunner.texmessageparsed = (s1 + s2).strip()
 194         except (IndexError, ValueError):
 195             pass
 196
 197         # check for "Output written on ...dvi (1 page, 220 bytes)."
 198         dvipattern = re.compile(r"Output written on %s\.dvi \((?P<page>\d+) pages?, \d+ bytes\)\." % texrunner.texfilename)
 199         m = dvipattern.search(texrunner.texmessageparsed)
 200         if texrunner.page:
 201             if not m:
 202                 raise TexResultError("TeX dvifile messages expected", texrunner)
 203             if m.group("page") != str(texrunner.page):
 204                 raise TexResultError("wrong number of pages reported", texrunner)
 205             texrunner.texmessageparsed = texrunner.texmessageparsed[:m.start()] + texrunner.texmessageparsed[m.end():]
 206         else:
 207             try:
 208                 s1, s2 = texrunner.texmessageparsed.split("No pages of output.", 1)
 209                 texrunner.texmessageparsed = s1 + s2
 210             except (IndexError, ValueError):
 211                 raise TexResultError("no dvifile expected", texrunner)
 212
 213         # check for "Transcript written on ...log."
 214         try:
 215             s1, s2 = texrunner.texmessageparsed.split("Transcript written on %s.log." % texrunner.texfilename, 1)
 216             texrunner.texmessageparsed = s1 + s2
 217         except (IndexError, ValueError):
 218             raise TexResultError("TeX logfile message expected", texrunner)
 219
 220
 221 class _texmessageemptylines(texmessage):
 222     """validates "*-only" (TeX/LaTeX input marker in interactive mode) and empty lines
 223     also clear TeX interactive mode warning (Please type a command or say `\\end')
 224     """
 225
 226     __implements__ = _Itexmessage
 227
 228     def check(self, texrunner):
 229         texrunner.texmessageparsed = texrunner.texmessageparsed.replace(r"(Please type a command or say `\end')", "")
 230         texrunner.texmessageparsed = texrunner.texmessageparsed.replace(" ", "")
 231         texrunner.texmessageparsed = texrunner.texmessageparsed.replace("*\n", "")
 232         texrunner.texmessageparsed = texrunner.texmessageparsed.replace("\n", "")
 233
 234
 235 class _texmessageload(texmessage):
 236     """validates inclusion of arbitrary files
 237     - the matched pattern is "(<filename> <arbitrary other stuff>)", where
 238       <filename> is a readable file and other stuff can be anything
 239     - If the filename is enclosed in double quotes, it may contain blank space.
 240     - "(" and ")" must be used consistent (otherwise this validator just does nothing)
 241     - this is not always wanted, but we just assume that file inclusion is fine"""
 242
 243     __implements__ = _Itexmessage
 244
 245     pattern = re.compile(r"\([\"]?(?P<filename>(?:(?<!\")[^()\s\n]+(?!\"))|[^\"\n]+)[\"]?(?P<additional>[^()]*)\)")
 246
 247     def baselevels(self, s, maxlevel=1, brackets="()", quotes='""'):
 248         """strip parts of a string above a given bracket level
 249         - return a modified (some parts might be removed) version of the string s
 250           where all parts inside brackets with level higher than maxlevel are
 251           removed
 252         - if brackets do not match (number of left and right brackets is wrong
 253           or at some points there were more right brackets than left brackets)
 254           just return the unmodified string
 255         - a quoted string immediately followed after a bracket is left untouched
 256           even if it contains quotes itself"""
 257         level = 0
 258         highestlevel = 0
 259         inquote = 0
 260         res = ""
 261         for i, c in enumerate(s):
 262             if quotes and level <= maxlevel:
 263                 if not inquote and c == quotes[0] and i and s[i-1] == brackets[0]:
 264                     inquote = 1
 265                 elif inquote and c == quotes[1]:
 266                     inquote = 0
 267             if inquote:
 268                 res += c
 269             else:
 270                 if c == brackets[0]:
 271                     level += 1
 272                     if level > highestlevel:
 273                         highestlevel = level
 274                 if level <= maxlevel:
 275                     res += c
 276                 if c == brackets[1]:
 277                     level -= 1
 278         if level == 0 and highestlevel > 0:
 279             return res
 280
 281     def check(self, texrunner):
 282         search = self.baselevels(texrunner.texmessageparsed)
 283         res = []
 284         if search is not None:
 285             m = self.pattern.search(search)
 286             while m:
 287                 filename = m.group("filename").replace("\n", "")
 288                 try:
 289                     additional = m.group("additional")
 290                 except IndexError:
 291                     additional = ""
 292                 if (os.access(filename, os.R_OK) or
 293                     len(additional) and additional[0] == "\n" and os.access(filename+additional.split()[0], os.R_OK)):
 294                     res.append(search[:m.start()])
 295                 else:
 296                     res.append(search[:m.end()])
 297                 search = search[m.end():]
 298                 m = self.pattern.search(search)
 299             else:
 300                 res.append(search)
 301                 texrunner.texmessageparsed = "".join(res)
 302
 303
 304 class _texmessageloaddef(_texmessageload):
 305     """validates the inclusion of font description files (fd-files)
 306     - works like _texmessageload
 307     - filename must end with .def or .fd
 308     - further text is allowed"""
 309
 310     pattern = re.compile(r"\([\"]?(?P<filename>(?:(?:(?<!\")[^\(\)\s\n\"]+)|(?:(?<=\")[^\(\)\"]+))(\.fd|\.def))[\"]?[\s\n]*(?P<additional>[\(]?[^\(\)]*[\)]?)[\s\n]*\)")
 311
 312     def baselevels(self, s, **kwargs):
 313         return s
 314
 315
 316 class _texmessagegraphicsload(_texmessageload):
 317     """validates the inclusion of files as the graphics packages writes it
 318     - works like _texmessageload, but using "<" and ">" as delimiters
 319     - filename must end with .eps and no further text is allowed"""
 320
 321     pattern = re.compile(r"<(?P<filename>[^>]+.eps)>")
 322
 323     def baselevels(self, s, **kwargs):
 324         return s
 325
 326
 327 class _texmessageignore(_texmessageload):
 328     """validates any TeX/LaTeX response
 329     - this might be used, when the expression is ok, but no suitable texmessage
 330       parser is available
 331     - PLEASE: - consider writing suitable tex message parsers
 332               - share your ideas/problems/solutions with others (use the PyX mailing lists)"""
 333
 334     __implements__ = _Itexmessage
 335
 336     def check(self, texrunner):
 337         texrunner.texmessageparsed = ""
 338
 339
 340 texmessage.start = _texmessagestart()
 341 texmessage.noaux = _texmessagenofile("aux")
 342 texmessage.nonav = _texmessagenofile("nav")
 343 texmessage.end = _texmessageend()
 344 texmessage.load = _texmessageload()
 345 texmessage.loaddef = _texmessageloaddef()
 346 texmessage.graphicsload = _texmessagegraphicsload()
 347 texmessage.ignore = _texmessageignore()
 348
 349 # for internal use:
 350 texmessage.inputmarker = _texmessageinputmarker()
 351 texmessage.pyxbox = _texmessagepyxbox()
 352 texmessage.pyxpageout = _texmessagepyxpageout()
 353 texmessage.emptylines = _texmessageemptylines()
 354
 355
 356 class _texmessageallwarning(texmessage):
 357     """validates a given pattern 'pattern' as a warning 'warning'"""
 358
 359     def check(self, texrunner):
 360         if texrunner.texmessageparsed:
 361             warnings.warn("ignoring all warnings:\n%s" % texrunner.texmessageparsed)
 362         texrunner.texmessageparsed = ""
 363
 364 texmessage.allwarning = _texmessageallwarning()
 365
 366
 367 class texmessagepattern(texmessage):
 368     """validates a given pattern and issue a warning (when set)"""
 369
 370     def __init__(self, pattern, warning=None):
 371         self.pattern = pattern
 372         self.warning = warning
 373
 374     def check(self, texrunner):
 375         m = self.pattern.search(texrunner.texmessageparsed)
 376         while m:
 377             texrunner.texmessageparsed = texrunner.texmessageparsed[:m.start()] + texrunner.texmessageparsed[m.end():]
 378             if self.warning:
 379                 warnings.warn("%s:\n%s" % (self.warning, m.string[m.start(): m.end()].rstrip()))
 380             m = self.pattern.search(texrunner.texmessageparsed)
 381
 382 texmessage.fontwarning = texmessagepattern(re.compile(r"^LaTeX Font Warning: .*$(\n^\(Font\).*$)*", re.MULTILINE), "ignoring font warning")
 383 texmessage.boxwarning = texmessagepattern(re.compile(r"^(Overfull|Underfull) \\[hv]box.*$(\n^..*$)*\n^$\n", re.MULTILINE), "ignoring overfull/underfull box warning")
 384 texmessage.rerunwarning = texmessagepattern(re.compile(r"^(LaTeX Warning: Label\(s\) may have changed\. Rerun to get cross-references right\s*\.)$", re.MULTILINE), "ignoring rerun warning")
 385 texmessage.packagewarning = texmessagepattern(re.compile(r"^package\s+(?P<packagename>\S+)\s+warning\s*:[^\n]+(?:\n\(?(?P=packagename)\)?[^\n]*)*", re.MULTILINE | re.IGNORECASE), "ignoring generic package warning")
 386 texmessage.nobblwarning = texmessagepattern(re.compile(r"^[\s\*]*(No file .*\.bbl.)\s*", re.MULTILINE), "ignoring no-bbl warning")
 387
 388
 389
 390 ###############################################################################
 391 # textattrs
 392 ###############################################################################
 393
 394 _textattrspreamble = ""
 395
 396 class textattr:
 397     "a textattr defines a apply method, which modifies a (La)TeX expression"
 398
 399 class _localattr: pass
 400
 401 _textattrspreamble += r"""\gdef\PyXFlushHAlign{0}%
 402 \def\PyXragged{%
 403 \leftskip=0pt plus \PyXFlushHAlign fil%
 404 \rightskip=0pt plus 1fil%
 405 \advance\rightskip0pt plus -\PyXFlushHAlign fil%
 406 \parfillskip=0pt%
 407 \pretolerance=9999%
 408 \tolerance=9999%
 409 \parindent=0pt%
 410 \hyphenpenalty=9999%
 411 \exhyphenpenalty=9999}%
 412 """
 413
 414 class boxhalign(attr.exclusiveattr, textattr, _localattr):
 415
 416     def __init__(self, aboxhalign):
 417         self.boxhalign = aboxhalign
 418         attr.exclusiveattr.__init__(self, boxhalign)
 419
 420     def apply(self, expr):
 421         return r"\gdef\PyXBoxHAlign{%.5f}%s" % (self.boxhalign, expr)
 422
 423 boxhalign.left = boxhalign(0)
 424 boxhalign.center = boxhalign(0.5)
 425 boxhalign.right = boxhalign(1)
 426 # boxhalign.clear = attr.clearclass(boxhalign) # we can't defined a clearclass for boxhalign since it can't clear a halign's boxhalign
 427
 428
 429 class flushhalign(attr.exclusiveattr, textattr, _localattr):
 430
 431     def __init__(self, aflushhalign):
 432         self.flushhalign = aflushhalign
 433         attr.exclusiveattr.__init__(self, flushhalign)
 434
 435     def apply(self, expr):
 436         return r"\gdef\PyXFlushHAlign{%.5f}\PyXragged{}%s" % (self.flushhalign, expr)
 437
 438 flushhalign.left = flushhalign(0)
 439 flushhalign.center = flushhalign(0.5)
 440 flushhalign.right = flushhalign(1)
 441 # flushhalign.clear = attr.clearclass(flushhalign) # we can't defined a clearclass for flushhalign since it couldn't clear a halign's flushhalign
 442
 443
 444 class halign(attr.exclusiveattr, textattr, boxhalign, flushhalign, _localattr):
 445
 446     def __init__(self, aboxhalign, aflushhalign):
 447         self.boxhalign = aboxhalign
 448         self.flushhalign = aflushhalign
 449         attr.exclusiveattr.__init__(self, halign)
 450
 451     def apply(self, expr):
 452         return r"\gdef\PyXBoxHAlign{%.5f}\gdef\PyXFlushHAlign{%.5f}\PyXragged{}%s" % (self.boxhalign, self.flushhalign, expr)
 453
 454 halign.left = halign(0, 0)
 455 halign.center = halign(0.5, 0.5)
 456 halign.right = halign(1, 1)
 457 halign.clear = attr.clearclass(halign)
 458 halign.boxleft = boxhalign.left
 459 halign.boxcenter = boxhalign.center
 460 halign.boxright = boxhalign.right
 461 halign.flushleft = halign.raggedright = flushhalign.left
 462 halign.flushcenter = halign.raggedcenter = flushhalign.center
 463 halign.flushright = halign.raggedleft = flushhalign.right
 464
 465
 466 class _mathmode(attr.attr, textattr, _localattr):
 467     "math mode"
 468
 469     def apply(self, expr):
 470         return r"$\displaystyle{%s}$" % expr
 471
 472 mathmode = _mathmode()
 473 clearmathmode = attr.clearclass(_mathmode)
 474
 475
 476 class _phantom(attr.attr, textattr, _localattr):
 477     "phantom text"
 478
 479     def apply(self, expr):
 480         return r"\phantom{%s}" % expr
 481
 482 phantom = _phantom()
 483 clearphantom = attr.clearclass(_phantom)
 484
 485
 486 _textattrspreamble += "\\newbox\\PyXBoxVBox%\n\\newdimen\\PyXDimenVBox%\n"
 487
 488 class parbox_pt(attr.sortbeforeexclusiveattr, textattr):
 489
 490     top = 1
 491     middle = 2
 492     bottom = 3
 493
 494     def __init__(self, width, baseline=top):
 495         self.width = width * 72.27 / (unit.scale["x"] * 72)
 496         self.baseline = baseline
 497         attr.sortbeforeexclusiveattr.__init__(self, parbox_pt, [_localattr])
 498
 499     def apply(self, expr):
 500         if self.baseline == self.top:
 501             return r"\linewidth=%.5ftruept\vtop{\hsize=\linewidth\textwidth=\linewidth{}%s}" % (self.width, expr)
 502         elif self.baseline == self.middle:
 503             return r"\linewidth=%.5ftruept\setbox\PyXBoxVBox=\hbox{{\vtop{\hsize=\linewidth\textwidth=\linewidth{}%s}}}\PyXDimenVBox=0.5\dp\PyXBoxVBox\setbox\PyXBoxVBox=\hbox{{\vbox{\hsize=\linewidth\textwidth=\linewidth{}%s}}}\advance\PyXDimenVBox by -0.5\dp\PyXBoxVBox\lower\PyXDimenVBox\box\PyXBoxVBox" % (self.width, expr, expr)
 504         elif self.baseline == self.bottom:
 505             return r"\linewidth=%.5ftruept\vbox{\hsize=\linewidth\textwidth=\linewidth{}%s}" % (self.width, expr)
 506         else:
 507             RuntimeError("invalid baseline argument")
 508
 509 parbox_pt.clear = attr.clearclass(parbox_pt)
 510
 511 class parbox(parbox_pt):
 512
 513     def __init__(self, width, **kwargs):
 514         parbox_pt.__init__(self, unit.topt(width), **kwargs)
 515
 516 parbox.clear = parbox_pt.clear
 517
 518
 519 _textattrspreamble += "\\newbox\\PyXBoxVAlign%\n\\newdimen\\PyXDimenVAlign%\n"
 520
 521 class valign(attr.sortbeforeexclusiveattr, textattr):
 522
 523     def __init__(self, avalign):
 524         self.valign = avalign
 525         attr.sortbeforeexclusiveattr.__init__(self, valign, [parbox_pt, _localattr])
 526
 527     def apply(self, expr):
 528         return r"\setbox\PyXBoxVAlign=\hbox{{%s}}\PyXDimenVAlign=%.5f\ht\PyXBoxVAlign\advance\PyXDimenVAlign by -%.5f\dp\PyXBoxVAlign\lower\PyXDimenVAlign\box\PyXBoxVAlign" % (expr, 1-self.valign, self.valign)
 529
 530 valign.top = valign(0)
 531 valign.middle = valign(0.5)
 532 valign.bottom = valign(1)
 533 valign.clear = valign.baseline = attr.clearclass(valign)
 534
 535
 536 _textattrspreamble += "\\newdimen\\PyXDimenVShift%\n"
 537
 538 class _vshift(attr.sortbeforeattr, textattr):
 539
 540     def __init__(self):
 541         attr.sortbeforeattr.__init__(self, [valign, parbox_pt, _localattr])
 542
 543     def apply(self, expr):
 544         return r"%s\setbox0\hbox{{%s}}\lower\PyXDimenVShift\box0" % (self.setheightexpr(), expr)
 545
 546 class vshift(_vshift):
 547     "vertical down shift by a fraction of a character height"
 548
 549     def __init__(self, lowerratio, heightstr="0"):
 550         _vshift.__init__(self)
 551         self.lowerratio = lowerratio
 552         self.heightstr = heightstr
 553
 554     def setheightexpr(self):
 555         return r"\setbox0\hbox{{%s}}\PyXDimenVShift=%.5f\ht0" % (self.heightstr, self.lowerratio)
 556
 557 class _vshiftmathaxis(_vshift):
 558     "vertical down shift by the height of the math axis"
 559
 560     def setheightexpr(self):
 561         return r"\setbox0\hbox{$\vcenter{\vrule width0pt}$}\PyXDimenVShift=\ht0"
 562
 563
 564 vshift.bottomzero = vshift(0)
 565 vshift.middlezero = vshift(0.5)
 566 vshift.topzero = vshift(1)
 567 vshift.mathaxis = _vshiftmathaxis()
 568 vshift.clear = attr.clearclass(_vshift)
 569
 570
 571 defaultsizelist = ["normalsize", "large", "Large", "LARGE", "huge", "Huge",
 572 None, "tiny", "scriptsize", "footnotesize", "small"]
 573
 574 class size(attr.sortbeforeattr, textattr):
 575     "font size"
 576
 577     def __init__(self, sizeindex=None, sizename=None, sizelist=defaultsizelist):
 578         if (sizeindex is None and sizename is None) or (sizeindex is not None and sizename is not None):
 579             raise RuntimeError("either specify sizeindex or sizename")
 580         attr.sortbeforeattr.__init__(self, [_mathmode, _vshift])
 581         if sizeindex is not None:
 582             if sizeindex >= 0 and sizeindex < sizelist.index(None):
 583                 self.size = sizelist[sizeindex]
 584             elif sizeindex < 0 and sizeindex + len(sizelist) > sizelist.index(None):
 585                 self.size = sizelist[sizeindex]
 586             else:
 587                 raise IndexError("index out of sizelist range")
 588         else:
 589             self.size = sizename
 590
 591     def apply(self, expr):
 592         return r"\%s{}%s" % (self.size, expr)
 593
 594 size.tiny = size(-4)
 595 size.scriptsize = size.script = size(-3)
 596 size.footnotesize = size.footnote = size(-2)
 597 size.small = size(-1)
 598 size.normalsize = size.normal = size(0)
 599 size.large = size(1)
 600 size.Large = size(2)
 601 size.LARGE = size(3)
 602 size.huge = size(4)
 603 size.Huge = size(5)
 604 size.clear = attr.clearclass(size)
 605
 606
 607 ###############################################################################
 608 # texrunner
 609 ###############################################################################
 610
 611
 612 class _readpipe(threading.Thread):
 613     """threaded reader of TeX/LaTeX output
 614     - sets an event, when a specific string in the programs output is found
 615     - sets an event, when the terminal ends"""
 616
 617     def __init__(self, pipe, expectqueue, gotevent, gotqueue, quitevent):
 618         """initialize the reader
 619         - pipe: file to be read from
 620         - expectqueue: keeps the next InputMarker to be wait for
 621         - gotevent: the "got InputMarker" event
 622         - gotqueue: a queue containing the lines recieved from TeX/LaTeX
 623         - quitevent: the "end of terminal" event"""
 624         threading.Thread.__init__(self)
 625         self.setDaemon(1) # don't care if the output might not be finished (nevertheless, it shouldn't happen)
 626         self.pipe = pipe
 627         self.expectqueue = expectqueue
 628         self.gotevent = gotevent
 629         self.gotqueue = gotqueue
 630         self.quitevent = quitevent
 631         self.expect = None
 632
 633     def run(self):
 634         """thread routine"""
 635         def _read():
 636             # catch interupted system call errors while reading
 637             while 1:
 638                 try:
 639                     return self.pipe.readline()
 640                 except IOError, e:
 641                     if e.errno != errno.EINTR:
 642                          raise
 643         read = _read() # read, what comes in
 644         try:
 645             self.expect = self.expectqueue.get_nowait() # read, what should be expected
 646         except Queue.Empty:
 647             pass
 648         while len(read):
 649             # universal EOL handling (convert everything into unix like EOLs)
 650             # XXX is this necessary on pipes?
 651             read = read.replace("\r", "").replace("\n", "") + "\n"
 652             self.gotqueue.put(read) # report, whats read
 653             if self.expect is not None and read.find(self.expect) != -1:
 654                 self.gotevent.set() # raise the got event, when the output was expected (XXX: within a single line)
 655             read = _read() # read again
 656             try:
 657                 self.expect = self.expectqueue.get_nowait()
 658             except Queue.Empty:
 659                 pass
 660         # EOF reached
 661         self.pipe.close()
 662         if self.expect is not None and self.expect.find("PyXInputMarker") != -1:
 663             raise RuntimeError("TeX/LaTeX finished unexpectedly")
 664         self.quitevent.set()
 665
 666
 667 class textbox(box.rect, canvas._canvas):
 668     """basically a box.rect, but it contains a text created by the texrunner
 669     - texrunner._text and texrunner.text return such an object
 670     - _textbox instances can be inserted into a canvas
 671     - the output is contained in a page of the dvifile available thru the texrunner"""
 672     # TODO: shouldn't all boxes become canvases? how about inserts then?
 673
 674     def __init__(self, x, y, left, right, height, depth, finishdvi, attrs):
 675         """
 676         - finishdvi is a method to be called to get the dvicanvas
 677           (e.g. the finishdvi calls the setdvicanvas method)
 678         - attrs are fillstyles"""
 679         self.left = left
 680         self.right = right
 681         self.width = left + right
 682         self.height = height
 683         self.depth = depth
 684         self.texttrafo = trafo.scale(unit.scale["x"]).translated(x, y)
 685         box.rect.__init__(self, x - left, y - depth, left + right, depth + height, abscenter = (left, depth))
 686         canvas._canvas.__init__(self, attrs)
 687         self.finishdvi = finishdvi
 688         self.dvicanvas = None
 689         self.insertdvicanvas = 0
 690
 691     def transform(self, *trafos):
 692         if self.insertdvicanvas:
 693             raise RuntimeError("can't apply transformation after dvicanvas was inserted")
 694         box.rect.transform(self, *trafos)
 695         for trafo in trafos:
 696             self.texttrafo = trafo * self.texttrafo
 697
 698     def setdvicanvas(self, dvicanvas):
 699         if self.dvicanvas is not None:
 700             raise RuntimeError("multiple call to setdvicanvas")
 701         self.dvicanvas = dvicanvas
 702
 703     def ensuredvicanvas(self):
 704         if self.dvicanvas is None:
 705             self.finishdvi()
 706             assert self.dvicanvas is not None, "finishdvi is broken"
 707         if not self.insertdvicanvas:
 708             self.insert(self.dvicanvas, [self.texttrafo])
 709             self.insertdvicanvas = 1
 710
 711     def marker(self, marker):
 712         self.ensuredvicanvas()
 713         return self.texttrafo.apply(*self.dvicanvas.markers[marker])
 714
 715     def processPS(self, file, writer, context, registry, bbox):
 716         self.ensuredvicanvas()
 717         abbox = bboxmodule.empty()
 718         canvas._canvas.processPS(self, file, writer, context, registry, abbox)
 719         bbox += box.rect.bbox(self)
 720
 721     def processPDF(self, file, writer, context, registry, bbox):
 722         self.ensuredvicanvas()
 723         abbox = bboxmodule.empty()
 724         canvas._canvas.processPDF(self, file, writer, context, registry, abbox)
 725         bbox += box.rect.bbox(self)
 726
 727
 728 def _cleantmp(texrunner):
 729     """get rid of temporary files
 730     - function to be registered by atexit
 731     - files contained in usefiles are kept"""
 732     if texrunner.texruns: # cleanup while TeX is still running?
 733         texrunner.expectqueue.put_nowait(None)              # do not expect any output anymore
 734         if texrunner.mode == "latex":                       # try to immediately quit from TeX or LaTeX
 735             texrunner.texinput.write("\n\\catcode`\\@11\\relax\\@@end\n")
 736         else:
 737             texrunner.texinput.write("\n\\end\n")
 738         texrunner.texinput.close()                          # close the input queue and
 739         if not texrunner.waitforevent(texrunner.quitevent): # wait for finish of the output
 740             return                                          # didn't got a quit from TeX -> we can't do much more
 741         texrunner.texruns = 0
 742         texrunner.texdone = 1
 743     for usefile in texrunner.usefiles:
 744         extpos = usefile.rfind(".")
 745         try:
 746             os.rename(texrunner.texfilename + usefile[extpos:], usefile)
 747         except OSError:
 748             pass
 749     for file in glob.glob("%s.*" % texrunner.texfilename) + ["%sNotes.bib" % texrunner.texfilename]:
 750         try:
 751             os.unlink(file)
 752         except OSError:
 753             pass
 754     if texrunner.texdebug is not None:
 755         try:
 756             texrunner.texdebug.close()
 757             texrunner.texdebug = None
 758         except IOError:
 759             pass
 760
 761
 762 class _unset:
 763     pass
 764
 765 class texrunner:
 766     """TeX/LaTeX interface
 767     - runs TeX/LaTeX expressions instantly
 768     - checks TeX/LaTeX response
 769     - the instance variable texmessage stores the last TeX
 770       response as a string
 771     - the instance variable texmessageparsed stores a parsed
 772       version of texmessage; it should be empty after
 773       texmessage.check was called, otherwise a TexResultError
 774       is raised
 775     - the instance variable errordebug controls the verbose
 776       level of TexResultError"""
 777
 778     defaulttexmessagesstart = [texmessage.start]
 779     defaulttexmessagesdocclass = [texmessage.load]
 780     defaulttexmessagesbegindoc = [texmessage.load, texmessage.noaux]
 781     defaulttexmessagesend = [texmessage.end, texmessage.fontwarning, texmessage.rerunwarning, texmessage.nobblwarning]
 782     defaulttexmessagesdefaultpreamble = [texmessage.load]
 783     defaulttexmessagesdefaultrun = [texmessage.loaddef, texmessage.graphicsload,
 784                                     texmessage.fontwarning, texmessage.boxwarning, texmessage.packagewarning]
 785
 786     def __init__(self, mode="tex",
 787                        lfs="10pt",
 788                        docclass="article",
 789                        docopt=None,
 790                        usefiles=[],
 791                        waitfortex=config.getint("text", "waitfortex", 60),
 792                        showwaitfortex=config.getint("text", "showwaitfortex", 5),
 793                        texipc=config.getboolean("text", "texipc", 0),
 794                        texdebug=None,
 795                        dvidebug=0,
 796                        errordebug=1,
 797                        pyxgraphics=1,
 798                        texmessagesstart=[],
 799                        texmessagesdocclass=[],
 800                        texmessagesbegindoc=[],
 801                        texmessagesend=[],
 802                        texmessagesdefaultpreamble=[],
 803                        texmessagesdefaultrun=[]):
 804         mode = mode.lower()
 805         if mode != "tex" and mode != "latex":
 806             raise ValueError("mode \"TeX\" or \"LaTeX\" expected")
 807         self.mode = mode
 808         self.lfs = lfs
 809         self.docclass = docclass
 810         self.docopt = docopt
 811         self.usefiles = usefiles[:]
 812         self.waitfortex = waitfortex
 813         self.showwaitfortex = showwaitfortex
 814         self.texipc = texipc
 815         if texdebug is not None:
 816             if texdebug[-4:] == ".tex":
 817                 self.texdebug = open(texdebug, "w")
 818             else:
 819                 self.texdebug = open("%s.tex" % texdebug, "w")
 820         else:
 821             self.texdebug = None
 822         self.dvidebug = dvidebug
 823         self.errordebug = errordebug
 824         self.pyxgraphics = pyxgraphics
 825         self.texmessagesstart = texmessagesstart[:]
 826         self.texmessagesdocclass = texmessagesdocclass[:]
 827         self.texmessagesbegindoc = texmessagesbegindoc[:]
 828         self.texmessagesend = texmessagesend[:]
 829         self.texmessagesdefaultpreamble = texmessagesdefaultpreamble[:]
 830         self.texmessagesdefaultrun = texmessagesdefaultrun[:]
 831
 832         self.texruns = 0
 833         self.texdone = 0
 834         self.preamblemode = 1
 835         self.executeid = 0
 836         self.page = 0
 837         self.preambles = []
 838         self.needdvitextboxes = [] # when texipc-mode off
 839         self.dvifile = None
 840         self.textboxesincluded = 0
 841         savetempdir = tempfile.tempdir
 842         tempfile.tempdir = os.curdir
 843         self.texfilename = os.path.basename(tempfile.mktemp())
 844         tempfile.tempdir = savetempdir
 845
 846     def waitforevent(self, event):
 847         """waits verbosely with an timeout for an event
 848         - observes an event while periodly while printing messages
 849         - returns the status of the event (isSet)
 850         - does not clear the event"""
 851         if self.showwaitfortex:
 852             waited = 0
 853             hasevent = 0
 854             while waited < self.waitfortex and not hasevent:
 855                 if self.waitfortex - waited > self.showwaitfortex:
 856                     event.wait(self.showwaitfortex)
 857                     waited += self.showwaitfortex
 858                 else:
 859                     event.wait(self.waitfortex - waited)
 860                     waited += self.waitfortex - waited
 861                 hasevent = event.isSet()
 862                 if not hasevent:
 863                     if waited < self.waitfortex:
 864                         warnings.warn("still waiting for %s after %i (of %i) seconds..." % (self.mode, waited, self.waitfortex), PyXTeXWarning)
 865                     else:
 866                         warnings.warn("the timeout of %i seconds expired and %s did not respond." % (waited, self.mode), PyXTeXWarning)
 867             return hasevent
 868         else:
 869             event.wait(self.waitfortex)
 870             return event.isSet()
 871
 872     def execute(self, expr, texmessages):
 873         """executes expr within TeX/LaTeX
 874         - if self.texruns is not yet set, TeX/LaTeX is initialized,
 875           self.texruns is set and self.preamblemode is set
 876         - the method must not be called, when self.texdone is already set
 877         - expr should be a string or None
 878         - when expr is None, TeX/LaTeX is stopped, self.texruns is unset and
 879           self.texdone becomes set
 880         - when self.preamblemode is set, the expr is passed directly to TeX/LaTeX
 881         - when self.preamblemode is unset, the expr is passed to \ProcessPyXBox
 882         - texmessages is a list of texmessage instances"""
 883         if not self.texruns:
 884             if self.texdebug is not None:
 885                 self.texdebug.write("%% PyX %s texdebug file\n" % version.version)
 886                 self.texdebug.write("%% mode: %s\n" % self.mode)
 887                 self.texdebug.write("%% date: %s\n" % time.asctime(time.localtime(time.time())))
 888             for usefile in self.usefiles:
 889                 extpos = usefile.rfind(".")
 890                 try:
 891                     os.rename(usefile, self.texfilename + usefile[extpos:])
 892                 except OSError:
 893                     pass
 894             texfile = open("%s.tex" % self.texfilename, "w") # start with filename -> creates dvi file with that name
 895             texfile.write("\\relax%\n")
 896             texfile.close()
 897             if self.texipc:
 898                 ipcflag = " --ipc"
 899             else:
 900                 ipcflag = ""
 901             try:
 902                 self.texinput, self.texoutput = pycompat.popen4("%s%s %s" % (self.mode, ipcflag, self.texfilename), "t", 0)
 903             except ValueError:
 904                 # workaround: bufsize = 0 is not supported on MS windows for os.open4 (Python 2.4 and below, i.e. where subprocess is not available)
 905                 self.texinput, self.texoutput = pycompat.popen4("%s%s %s" % (self.mode, ipcflag, self.texfilename), "t")
 906             atexit.register(_cleantmp, self)
 907             self.expectqueue = Queue.Queue(1)  # allow for a single entry only -> keeps the next InputMarker to be wait for
 908             self.gotevent = threading.Event()  # keeps the got inputmarker event
 909             self.gotqueue = Queue.Queue(0)     # allow arbitrary number of entries
 910             self.quitevent = threading.Event() # keeps for end of terminal event
 911             self.readoutput = _readpipe(self.texoutput, self.expectqueue, self.gotevent, self.gotqueue, self.quitevent)
 912             self.texruns = 1
 913             oldpreamblemode = self.preamblemode
 914             self.preamblemode = 1
 915             self.readoutput.start()
 916             self.execute("\\scrollmode\n\\raiseerror%\n" # switch to and check scrollmode
 917                          "\\def\\PyX{P\\kern-.3em\\lower.5ex\hbox{Y}\kern-.18em X}%\n" # just the PyX Logo
 918                          "\\gdef\\PyXBoxHAlign{0}%\n" # global PyXBoxHAlign (0.0-1.0) for the horizontal alignment, default to 0
 919                          "\\newbox\\PyXBox%\n" # PyXBox will contain the output
 920                          "\\newbox\\PyXBoxHAligned%\n" # PyXBox will contain the horizontal aligned output
 921                          "\\newdimen\\PyXDimenHAlignLT%\n" # PyXDimenHAlignLT/RT will contain the left/right extent
 922                          "\\newdimen\\PyXDimenHAlignRT%\n" +
 923                          _textattrspreamble + # insert preambles for textattrs macros
 924                          "\\long\\def\\ProcessPyXBox#1#2{%\n" # the ProcessPyXBox definition (#1 is expr, #2 is page number)
 925                          "\\setbox\\PyXBox=\\hbox{{#1}}%\n" # push expression into PyXBox
 926                          "\\PyXDimenHAlignLT=\\PyXBoxHAlign\\wd\\PyXBox%\n" # calculate the left/right extent
 927                          "\\PyXDimenHAlignRT=\\wd\\PyXBox%\n"
 928                          "\\advance\\PyXDimenHAlignRT by -\\PyXDimenHAlignLT%\n"
 929                          "\\gdef\\PyXBoxHAlign{0}%\n" # reset the PyXBoxHAlign to the default 0
 930                          "\\immediate\\write16{PyXBox:page=#2," # write page and extents of this box to stdout
 931                                                      "lt=\\the\\PyXDimenHAlignLT,"
 932                                                      "rt=\\the\\PyXDimenHAlignRT,"
 933                                                      "ht=\\the\\ht\\PyXBox,"
 934                                                      "dp=\\the\\dp\\PyXBox:}%\n"
 935                          "\\setbox\\PyXBoxHAligned=\\hbox{\\kern-\\PyXDimenHAlignLT\\box\\PyXBox}%\n" # align horizontally
 936                          "\\ht\\PyXBoxHAligned0pt%\n" # baseline alignment (hight to zero)
 937                          "{\\count0=80\\count1=121\\count2=88\\count3=#2\\shipout\\box\\PyXBoxHAligned}}%\n" # shipout PyXBox to Page 80.121.88.<page number>
 938                          "\\def\\PyXInput#1{\\immediate\\write16{PyXInputMarker:executeid=#1:}}%\n" # write PyXInputMarker to stdout
 939                          "\\def\\PyXMarker#1{\\hskip0pt\\special{PyX:marker #1}}%", # write PyXMarker special into the dvi-file
 940                          self.defaulttexmessagesstart + self.texmessagesstart)
 941             os.remove("%s.tex" % self.texfilename)
 942             if self.mode == "tex":
 943                 if self.lfs:
 944                     if not self.lfs.endswith(".lfs"):
 945                         self.lfs = "%s.lfs" % self.lfs
 946                     lfsfile = filelocator.open(self.lfs, [], "r")
 947                     lfsdef = lfsfile.read()
 948                     lfsfile.close()
 949                     self.execute(lfsdef, [])
 950                     self.execute("\\normalsize%\n", [])
 951                 self.execute("\\newdimen\\linewidth\\newdimen\\textwidth%\n", [])
 952             elif self.mode == "latex":
 953                 if self.pyxgraphics:
 954                     pyxdef = filelocator.open("pyx.def", [], "rb")
 955                     pyxdef_filename = self.texfilename + ".pyxdef"
 956                     pyxdef_file = open(pyxdef_filename, "wb")
 957                     pyxdef_file.write(pyxdef.read())
 958                     pyxdef.close()
 959                     pyxdef_file.close()
 960                     pyxdef_filename_tex = os.path.abspath(pyxdef_filename).replace(os.sep, "/")
 961                     self.execute("\\makeatletter%\n"
 962                                  "\\let\\saveProcessOptions=\\ProcessOptions%\n"
 963                                  "\\def\\ProcessOptions{%\n"
 964                                  "\\def\\Gin@driver{" + pyxdef_filename_tex + "}%\n"
 965                                  "\\def\\c@lor@namefile{dvipsnam.def}%\n"
 966                                  "\\saveProcessOptions}%\n"
 967                                  "\\makeatother",
 968                                  [])
 969                 if self.docopt is not None:
 970                     self.execute("\\documentclass[%s]{%s}" % (self.docopt, self.docclass),
 971                                  self.defaulttexmessagesdocclass + self.texmessagesdocclass)
 972                 else:
 973                     self.execute("\\documentclass{%s}" % self.docclass,
 974                                  self.defaulttexmessagesdocclass + self.texmessagesdocclass)
 975             self.preamblemode = oldpreamblemode
 976         self.executeid += 1
 977         if expr is not None: # TeX/LaTeX should process expr
 978             self.expectqueue.put_nowait("PyXInputMarker:executeid=%i:" % self.executeid)
 979             if self.preamblemode:
 980                 self.expr = ("%s%%\n" % expr +
 981                              "\\PyXInput{%i}%%\n" % self.executeid)
 982             else:
 983                 self.page += 1
 984                 self.expr = ("\\ProcessPyXBox{%s%%\n}{%i}%%\n" % (expr, self.page) +
 985                              "\\PyXInput{%i}%%\n" % self.executeid)
 986         else: # TeX/LaTeX should be finished
 987             self.expectqueue.put_nowait("Transcript written on %s.log" % self.texfilename)
 988             if self.mode == "latex":
 989                 self.expr = "\\end{document}%\n"
 990             else:
 991                 self.expr = "\\end%\n"
 992         if self.texdebug is not None:
 993             self.texdebug.write(self.expr)
 994         self.texinput.write(self.expr)
 995         gotevent = self.waitforevent(self.gotevent)
 996         self.gotevent.clear()
 997         if expr is None and gotevent: # TeX/LaTeX should have finished
 998             self.texruns = 0
 999             self.texdone = 1
1000             self.texinput.close()                        # close the input queue and
1001             gotevent = self.waitforevent(self.quitevent) # wait for finish of the output
1002         try:
1003             self.texmessage = ""
1004             while 1:
1005                 self.texmessage += self.gotqueue.get_nowait()
1006         except Queue.Empty:
1007             pass
1008         self.texmessage = self.texmessage.replace("\r\n", "\n").replace("\r", "\n")
1009         self.texmessageparsed = self.texmessage
1010         if gotevent:
1011             if expr is not None:
1012                 texmessage.inputmarker.check(self)
1013                 if not self.preamblemode:
1014                     texmessage.pyxbox.check(self)
1015                     texmessage.pyxpageout.check(self)
1016             texmessages = attr.mergeattrs(texmessages)
1017             for t in texmessages:
1018                 t.check(self)
1019             keeptexmessageparsed = self.texmessageparsed
1020             texmessage.emptylines.check(self)
1021             if len(self.texmessageparsed):
1022                 self.texmessageparsed = keeptexmessageparsed
1023                 raise TexResultError("unhandled TeX response (might be an error)", self)
1024         else:
1025             raise TexResultError("TeX didn't respond as expected within the timeout period (%i seconds)." % self.waitfortex, self)
1026
1027     def finishdvi(self, ignoretail=0):
1028         """finish TeX/LaTeX and read the dvifile
1029         - this method ensures that all textboxes can access their
1030           dvicanvas"""
1031         self.execute(None, self.defaulttexmessagesend + self.texmessagesend)
1032         dvifilename = "%s.dvi" % self.texfilename
1033         if not self.texipc:
1034             self.dvifile = dvifile.DVIfile(dvifilename, debug=self.dvidebug)
1035             page = 1
1036             for box in self.needdvitextboxes:
1037                 box.setdvicanvas(self.dvifile.readpage([ord("P"), ord("y"), ord("X"), page, 0, 0, 0, 0, 0, 0], fontmap=box.fontmap))
1038                 page += 1
1039         if not ignoretail and self.dvifile.readpage(None) is not None:
1040             raise RuntimeError("end of dvifile expected")
1041         self.dvifile = None
1042         self.needdvitextboxes = []
1043
1044     def reset(self, reinit=0):
1045         "resets the tex runner to its initial state (upto its record to old dvi file(s))"
1046         if self.texruns:
1047             self.finishdvi()
1048         if self.texdebug is not None:
1049             self.texdebug.write("%s\n%% preparing restart of %s\n" % ("%"*80, self.mode))
1050         self.executeid = 0
1051         self.page = 0
1052         self.texdone = 0
1053         if reinit:
1054             self.preamblemode = 1
1055             for expr, texmessages in self.preambles:
1056                 self.execute(expr, texmessages)
1057             if self.mode == "latex":
1058                 self.execute("\\begin{document}", self.defaulttexmessagesbegindoc + self.texmessagesbegindoc)
1059             self.preamblemode = 0
1060         else:
1061             self.preambles = []
1062             self.preamblemode = 1
1063
1064     def set(self, mode=_unset,
1065                   lfs=_unset,
1066                   docclass=_unset,
1067                   docopt=_unset,
1068                   usefiles=_unset,
1069                   waitfortex=_unset,
1070                   showwaitfortex=_unset,
1071                   texipc=_unset,
1072                   texdebug=_unset,
1073                   dvidebug=_unset,
1074                   errordebug=_unset,
1075                   pyxgraphics=_unset,
1076                   texmessagesstart=_unset,
1077                   texmessagesdocclass=_unset,
1078                   texmessagesbegindoc=_unset,
1079                   texmessagesend=_unset,
1080                   texmessagesdefaultpreamble=_unset,
1081                   texmessagesdefaultrun=_unset):
1082         """provide a set command for TeX/LaTeX settings
1083         - TeX/LaTeX must not yet been started
1084         - especially needed for the defaultrunner, where no access to
1085           the constructor is available"""
1086         if self.texruns:
1087             raise RuntimeError("set not allowed -- TeX/LaTeX already started")
1088         if mode is not _unset:
1089             mode = mode.lower()
1090             if mode != "tex" and mode != "latex":
1091                 raise ValueError("mode \"TeX\" or \"LaTeX\" expected")
1092             self.mode = mode
1093         if lfs is not _unset:
1094             self.lfs = lfs
1095         if docclass is not _unset:
1096             self.docclass = docclass
1097         if docopt is not _unset:
1098             self.docopt = docopt
1099         if usefiles is not _unset:
1100             self.usefiles = usefiles
1101         if waitfortex is not _unset:
1102             self.waitfortex = waitfortex
1103         if showwaitfortex is not _unset:
1104             self.showwaitfortex = showwaitfortex
1105         if texipc is not _unset:
1106             self.texipc = texipc
1107         if texdebug is not _unset:
1108             if self.texdebug is not None:
1109                 self.texdebug.close()
1110             if texdebug[-4:] == ".tex":
1111                 self.texdebug = open(texdebug, "w")
1112             else:
1113                 self.texdebug = open("%s.tex" % texdebug, "w")
1114         if dvidebug is not _unset:
1115             self.dvidebug = dvidebug
1116         if errordebug is not _unset:
1117             self.errordebug = errordebug
1118         if pyxgraphics is not _unset:
1119             self.pyxgraphics = pyxgraphics
1120         if errordebug is not _unset:
1121             self.errordebug = errordebug
1122         if texmessagesstart is not _unset:
1123             self.texmessagesstart = texmessagesstart
1124         if texmessagesdocclass is not _unset:
1125             self.texmessagesdocclass = texmessagesdocclass
1126         if texmessagesbegindoc is not _unset:
1127             self.texmessagesbegindoc = texmessagesbegindoc
1128         if texmessagesend is not _unset:
1129             self.texmessagesend = texmessagesend
1130         if texmessagesdefaultpreamble is not _unset:
1131             self.texmessagesdefaultpreamble = texmessagesdefaultpreamble
1132         if texmessagesdefaultrun is not _unset:
1133             self.texmessagesdefaultrun = texmessagesdefaultrun
1134
1135     def preamble(self, expr, texmessages=[]):
1136         r"""put something into the TeX/LaTeX preamble
1137         - in LaTeX, this is done before the \begin{document}
1138           (you might use \AtBeginDocument, when you're in need for)
1139         - it is not allowed to call preamble after calling the
1140           text method for the first time (for LaTeX this is needed
1141           due to \begin{document}; in TeX it is forced for compatibility
1142           (you should be able to switch from TeX to LaTeX, if you want,
1143           without breaking something)
1144         - preamble expressions must not create any dvi output
1145         - args might contain texmessage instances"""
1146         if self.texdone or not self.preamblemode:
1147             raise RuntimeError("preamble calls disabled due to previous text calls")
1148         texmessages = self.defaulttexmessagesdefaultpreamble + self.texmessagesdefaultpreamble + texmessages
1149         self.execute(expr, texmessages)
1150         self.preambles.append((expr, texmessages))
1151
1152     PyXBoxPattern = re.compile(r"PyXBox:page=(?P<page>\d+),lt=(?P<lt>-?\d*((\d\.?)|(\.?\d))\d*)pt,rt=(?P<rt>-?\d*((\d\.?)|(\.?\d))\d*)pt,ht=(?P<ht>-?\d*((\d\.?)|(\.?\d))\d*)pt,dp=(?P<dp>-?\d*((\d\.?)|(\.?\d))\d*)pt:")
1153
1154     def text(self, x, y, expr, textattrs=[], texmessages=[], fontmap=None):
1155         """create text by passing expr to TeX/LaTeX
1156         - returns a textbox containing the result from running expr thru TeX/LaTeX
1157         - the box center is set to x, y
1158         - *args may contain attr parameters, namely:
1159           - textattr instances
1160           - texmessage instances
1161           - trafo._trafo instances
1162           - style.fillstyle instances"""
1163         if expr is None:
1164             raise ValueError("None expression is invalid")
1165         if self.texdone:
1166             self.reset(reinit=1)
1167         first = 0
1168         if self.preamblemode:
1169             if self.mode == "latex":
1170                 self.execute("\\begin{document}", self.defaulttexmessagesbegindoc + self.texmessagesbegindoc)
1171             self.preamblemode = 0
1172             first = 1
1173         textattrs = attr.mergeattrs(textattrs) # perform cleans
1174         attr.checkattrs(textattrs, [textattr, trafo.trafo_pt, style.fillstyle])
1175         trafos = attr.getattrs(textattrs, [trafo.trafo_pt])
1176         fillstyles = attr.getattrs(textattrs, [style.fillstyle])
1177         textattrs = attr.getattrs(textattrs, [textattr])
1178         # reverse loop over the merged textattrs (last is applied first)
1179         lentextattrs = len(textattrs)
1180         for i in range(lentextattrs):
1181             expr = textattrs[lentextattrs-1-i].apply(expr)
1182         try:
1183             self.execute(expr, self.defaulttexmessagesdefaultrun + self.texmessagesdefaultrun + texmessages)
1184         except TexResultError, e:
1185             warnings.warn("We try to finish the dvi due to an unhandled tex error", PyXTeXWarning)
1186             try:
1187                 self.finishdvi(ignoretail=1)
1188             except TexResultError:
1189                 pass
1190             raise e
1191         if self.texipc:
1192             if first:
1193                 self.dvifile = dvifile.DVIfile("%s.dvi" % self.texfilename, debug=self.dvidebug)
1194         match = self.PyXBoxPattern.search(self.texmessage)
1195         if not match or int(match.group("page")) != self.page:
1196             raise TexResultError("box extents not found", self)
1197         left, right, height, depth = [float(xxx)*72/72.27*unit.x_pt for xxx in match.group("lt", "rt", "ht", "dp")]
1198         box = textbox(x, y, left, right, height, depth, self.finishdvi, fillstyles)
1199         for t in trafos:
1200             box.reltransform(t) # TODO: should trafos really use reltransform???
1201                                 #       this is quite different from what we do elsewhere!!!
1202                                 #       see https://sourceforge.net/mailarchive/forum.php?thread_id=9137692&forum_id=23700
1203         if self.texipc:
1204             box.setdvicanvas(self.dvifile.readpage([ord("P"), ord("y"), ord("X"), self.page, 0, 0, 0, 0, 0, 0], fontmap=fontmap))
1205         else:
1206             box.fontmap = fontmap
1207             self.needdvitextboxes.append(box)
1208         return box
1209
1210     def text_pt(self, x, y, expr, *args, **kwargs):
1211         return self.text(x * unit.t_pt, y * unit.t_pt, expr, *args, **kwargs)
1212
1213     PyXVariableBoxPattern = re.compile(r"PyXVariableBox:page=(?P<page>\d+),par=(?P<par>\d+),prevgraf=(?P<prevgraf>\d+):")
1214
1215     def textboxes(self, text, pageshapes):
1216         # this is some experimental code to put text into several boxes
1217         # while the bounding shape changes from box to box (rectangles only)
1218         # first we load sev.tex
1219         if not self.textboxesincluded:
1220             self.execute(r"\input textboxes.tex", [texmessage.load])
1221             self.textboxesincluded = 1
1222         # define page shapes
1223         pageshapes_str = "\\hsize=%.5ftruept%%\n\\vsize=%.5ftruept%%\n" % (72.27/72*unit.topt(pageshapes[0][0]), 72.27/72*unit.topt(pageshapes[0][1]))
1224         pageshapes_str += "\\lohsizes={%\n"
1225         for hsize, vsize in pageshapes[1:]:
1226             pageshapes_str += "{\\global\\hsize=%.5ftruept}%%\n" % (72.27/72*unit.topt(hsize))
1227         pageshapes_str += "{\\relax}%\n}%\n"
1228         pageshapes_str += "\\lovsizes={%\n"
1229         for hsize, vsize in pageshapes[1:]:
1230             pageshapes_str += "{\\global\\vsize=%.5ftruept}%%\n" % (72.27/72*unit.topt(vsize))
1231         pageshapes_str += "{\\relax}%\n}%\n"
1232         page = 0
1233         parnos = []
1234         parshapes = []
1235         loop = 0
1236         while 1:
1237             self.execute(pageshapes_str, [])
1238             parnos_str = "}{".join(parnos)
1239             if parnos_str:
1240                 parnos_str = "{%s}" % parnos_str
1241             parnos_str = "\\parnos={%s{\\relax}}%%\n" % parnos_str
1242             self.execute(parnos_str, [])
1243             parshapes_str = "\\parshapes={%%\n%s%%\n{\\relax}%%\n}%%\n" % "%\n".join(parshapes)
1244             self.execute(parshapes_str, [])
1245             self.execute("\\global\\count0=1%%\n"
1246                          "\\global\\parno=0%%\n"
1247                          "\\global\\myprevgraf=0%%\n"
1248                          "\\global\\showprevgraf=0%%\n"
1249                          "\\global\\outputtype=0%%\n"
1250                          "\\global\\leastcost=10000000%%\n"
1251                          "%s%%\n"
1252                          "\\vfill\\supereject%%\n" % text, [texmessage.ignore])
1253             if self.texipc:
1254                 if self.dvifile is None:
1255                     self.dvifile = dvifile.DVIfile("%s.dvi" % self.texfilename, debug=self.dvidebug)
1256             else:
1257                 raise RuntimeError("textboxes currently needs texipc")
1258             lastparnos = parnos
1259             parnos = []
1260             lastparshapes = parshapes
1261             parshapes = []
1262             pages = 0
1263             lastpar = prevgraf = -1
1264             m = self.PyXVariableBoxPattern.search(self.texmessage)
1265             while m:
1266                 pages += 1
1267                 page = int(m.group("page"))
1268                 assert page == pages
1269                 par = int(m.group("par"))
1270                 prevgraf = int(m.group("prevgraf"))
1271                 if page <= len(pageshapes):
1272                     width = 72.27/72*unit.topt(pageshapes[page-1][0])
1273                 else:
1274                     width = 72.27/72*unit.topt(pageshapes[-1][0])
1275                 if page < len(pageshapes):
1276                     nextwidth = 72.27/72*unit.topt(pageshapes[page][0])
1277                 else:
1278                     nextwidth = 72.27/72*unit.topt(pageshapes[-1][0])
1279
1280                 if par != lastpar:
1281                     # a new paragraph is to be broken
1282                     parnos.append(str(par))
1283                     parshape = " 0pt ".join(["%.5ftruept" % width for i in range(prevgraf)])
1284                     if len(parshape):
1285                         parshape = " 0pt " + parshape
1286                     parshapes.append("{\\parshape %i%s 0pt %.5ftruept}" % (prevgraf + 1, parshape, nextwidth))
1287                 elif prevgraf == lastprevgraf:
1288                     pass
1289                 else:
1290                     # we have to append the breaking of the previous paragraph
1291                     oldparshape = " ".join(parshapes[-1].split(' ')[2:2+2*lastprevgraf])
1292                     oldparshape = oldparshape.split('}')[0]
1293                     if len(parshape):
1294                         oldparshape = " " + oldparshape
1295                     parshape = " 0pt ".join(["%.5ftruept" % width for i in range(prevgraf - lastprevgraf)])
1296                     if len(parshape):
1297                         parshape = " 0pt " + parshape
1298                     else:
1299                         parshape = " "
1300                     parshapes[-1] = "{\\parshape %i%s%s 0pt %.5ftruept}" % (prevgraf + 1, oldparshape, parshape, nextwidth)
1301                 lastpar = par
1302                 lastprevgraf = prevgraf
1303                 nextpos = m.end()
1304                 m = self.PyXVariableBoxPattern.search(self.texmessage, nextpos)
1305             result = []
1306             for i in range(pages):
1307                 result.append(self.dvifile.readpage([i + 1, 0, 0, 0, 0, 0, 0, 0, 0, 0]))
1308             if parnos == lastparnos and parshapes == lastparshapes:
1309                 return result
1310             loop += 1
1311             if loop > 100:
1312                 raise TexResultError("Too many loops in textboxes ", texrunner)
1313
1314
1315 # the module provides an default texrunner and methods for direct access
1316 defaulttexrunner = texrunner()
1317 reset = defaulttexrunner.reset
1318 set = defaulttexrunner.set
1319 preamble = defaulttexrunner.preamble
1320 text = defaulttexrunner.text
1321 text_pt = defaulttexrunner.text_pt
1322
1323 def escapestring(s, replace={" ": "~",
1324                              "$": "\\$",
1325                              "&": "\\&",
1326                              "#": "\\#",
1327                              "_": "\\_",
1328                              "%": "\\%",
1329                              "^": "\\string^",
1330                              "~": "\\string~",
1331                              "<": "{$<$}",
1332                              ">": "{$>$}",
1333                              "{": "{$\{$}",
1334                              "}": "{$\}$}",
1335                              "\\": "{$\setminus$}",
1336                              "|": "{$\mid$}"}):
1337     "escape all ascii characters such that they are printable by TeX/LaTeX"
1338     i = 0
1339     while i < len(s):
1340         if not 32 <= ord(s[i]) < 127:
1341             raise ValueError("escapestring function handles ascii strings only")
1342         c = s[i]
1343         try:
1344             r = replace[c]
1345         except KeyError:
1346             i += 1
1347         else:
1348             s = s[:i] + r + s[i+1:]
1349             i += len(r)
1350     return s