|
18 | 18 | """ |
19 | 19 |
|
20 | 20 | fromcollectionsimportnamedtuple |
21 | | -importenum |
22 | 21 | fromfunctoolsimportlru_cache,partial,wraps |
23 | 22 | importlogging |
24 | 23 | importos |
@@ -297,186 +296,6 @@ def __init__(self, filename): |
297 | 296 | self.depth[char]=depths[byte1&0xf] |
298 | 297 |
|
299 | 298 |
|
300 | | -PsFont=namedtuple('PsFont','texname psname effects encoding filename') |
301 | | - |
302 | | - |
303 | | -classPsfontsMap: |
304 | | -""" |
305 | | - A psfonts.map formatted file, mapping TeX fonts to PS fonts. |
306 | | -
|
307 | | - Parameters |
308 | | - ---------- |
309 | | - filename : str or path-like |
310 | | -
|
311 | | - Notes |
312 | | - ----- |
313 | | - For historical reasons, TeX knows many Type-1 fonts by different |
314 | | - names than the outside world. (For one thing, the names have to |
315 | | - fit in eight characters.) Also, TeX's native fonts are not Type-1 |
316 | | - but Metafont, which is nontrivial to convert to PostScript except |
317 | | - as a bitmap. While high-quality conversions to Type-1 format exist |
318 | | - and are shipped with modern TeX distributions, we need to know |
319 | | - which Type-1 fonts are the counterparts of which native fonts. For |
320 | | - these reasons a mapping is needed from internal font names to font |
321 | | - file names. |
322 | | -
|
323 | | - A texmf tree typically includes mapping files called e.g. |
324 | | - :file:`psfonts.map`, :file:`pdftex.map`, or :file:`dvipdfm.map`. |
325 | | - The file :file:`psfonts.map` is used by :program:`dvips`, |
326 | | - :file:`pdftex.map` by :program:`pdfTeX`, and :file:`dvipdfm.map` |
327 | | - by :program:`dvipdfm`. :file:`psfonts.map` might avoid embedding |
328 | | - the 35 PostScript fonts (i.e., have no filename for them, as in |
329 | | - the Times-Bold example above), while the pdf-related files perhaps |
330 | | - only avoid the "Base 14" pdf fonts. But the user may have |
331 | | - configured these files differently. |
332 | | -
|
333 | | - Examples |
334 | | - -------- |
335 | | - >>> map = PsfontsMap(find_tex_file('pdftex.map')) |
336 | | - >>> entry = map[b'ptmbo8r'] |
337 | | - >>> entry.texname |
338 | | - b'ptmbo8r' |
339 | | - >>> entry.psname |
340 | | - b'Times-Bold' |
341 | | - >>> entry.encoding |
342 | | - '/usr/local/texlive/2008/texmf-dist/fonts/enc/dvips/base/8r.enc' |
343 | | - >>> entry.effects |
344 | | - {'slant': 0.16700000000000001} |
345 | | - >>> entry.filename |
346 | | - """ |
347 | | -__slots__= ('_filename','_unparsed','_parsed') |
348 | | - |
349 | | -# Create a filename -> PsfontsMap cache, so that calling |
350 | | -# `PsfontsMap(filename)` with the same filename a second time immediately |
351 | | -# returns the same object. |
352 | | -@lru_cache() |
353 | | -def__new__(cls,filename): |
354 | | -self=object.__new__(cls) |
355 | | -self._filename=os.fsdecode(filename) |
356 | | -# Some TeX distributions have enormous pdftex.map files which would |
357 | | -# take hundreds of milliseconds to parse, but it is easy enough to just |
358 | | -# store the unparsed lines (keyed by the first word, which is the |
359 | | -# texname) and parse them on-demand. |
360 | | -withopen(filename,'rb')asfile: |
361 | | -self._unparsed= {} |
362 | | -forlineinfile: |
363 | | -tfmname=line.split(b' ',1)[0] |
364 | | -self._unparsed.setdefault(tfmname, []).append(line) |
365 | | -self._parsed= {} |
366 | | -returnself |
367 | | - |
368 | | -def__getitem__(self,texname): |
369 | | -assertisinstance(texname,bytes) |
370 | | -iftexnameinself._unparsed: |
371 | | -forlineinself._unparsed.pop(texname): |
372 | | -ifself._parse_and_cache_line(line): |
373 | | -break |
374 | | -try: |
375 | | -returnself._parsed[texname] |
376 | | -exceptKeyError: |
377 | | -raiseLookupError( |
378 | | -f"An associated PostScript font (required by Matplotlib) " |
379 | | -f"could not be found for TeX font{texname.decode('ascii')!r} " |
380 | | -f"in{self._filename!r}; this problem can often be solved by " |
381 | | -f"installing a suitable PostScript font package in your TeX " |
382 | | -f"package manager")fromNone |
383 | | - |
384 | | -def_parse_and_cache_line(self,line): |
385 | | -""" |
386 | | - Parse a line in the font mapping file. |
387 | | -
|
388 | | - The format is (partially) documented at |
389 | | - http://mirrors.ctan.org/systems/doc/pdftex/manual/pdftex-a.pdf |
390 | | - https://tug.org/texinfohtml/dvips.html#psfonts_002emap |
391 | | - Each line can have the following fields: |
392 | | -
|
393 | | - - tfmname (first, only required field), |
394 | | - - psname (defaults to tfmname, must come immediately after tfmname if |
395 | | - present), |
396 | | - - fontflags (integer, must come immediately after psname if present, |
397 | | - ignored by us), |
398 | | - - special (SlantFont and ExtendFont, only field that is double-quoted), |
399 | | - - fontfile, encodingfile (optional, prefixed by <, <<, or <[; << always |
400 | | - precedes a font, <[ always precedes an encoding, < can precede either |
401 | | - but then an encoding file must have extension .enc; < and << also |
402 | | - request different font subsetting behaviors but we ignore that; < can |
403 | | - be separated from the filename by whitespace). |
404 | | -
|
405 | | - special, fontfile, and encodingfile can appear in any order. |
406 | | - """ |
407 | | -# If the map file specifies multiple encodings for a font, we |
408 | | -# follow pdfTeX in choosing the last one specified. Such |
409 | | -# entries are probably mistakes but they have occurred. |
410 | | -# https://tex.stackexchange.com/q/10826/ |
411 | | - |
412 | | -ifnotlineorline.startswith((b" ",b"%",b"*",b";",b"#")): |
413 | | -return |
414 | | -tfmname=basename=special=encodingfile=fontfile=None |
415 | | -is_subsetted=is_t1=is_truetype=False |
416 | | -matches=re.finditer(br'"([^"]*)(?:"|$)|(\S+)',line) |
417 | | -formatchinmatches: |
418 | | -quoted,unquoted=match.groups() |
419 | | -ifunquoted: |
420 | | -ifunquoted.startswith(b"<<"):# font |
421 | | -fontfile=unquoted[2:] |
422 | | -elifunquoted.startswith(b"<["):# encoding |
423 | | -encodingfile=unquoted[2:] |
424 | | -elifunquoted.startswith(b"<"):# font or encoding |
425 | | -word= ( |
426 | | -# <foo => foo |
427 | | -unquoted[1:] |
428 | | -# < by itself => read the next word |
429 | | -ornext(filter(None,next(matches).groups()))) |
430 | | -ifword.endswith(b".enc"): |
431 | | -encodingfile=word |
432 | | -else: |
433 | | -fontfile=word |
434 | | -is_subsetted=True |
435 | | -eliftfmnameisNone: |
436 | | -tfmname=unquoted |
437 | | -elifbasenameisNone: |
438 | | -basename=unquoted |
439 | | -elifquoted: |
440 | | -special=quoted |
441 | | -effects= {} |
442 | | -ifspecial: |
443 | | -words=reversed(special.split()) |
444 | | -forwordinwords: |
445 | | -ifword==b"SlantFont": |
446 | | -effects["slant"]=float(next(words)) |
447 | | -elifword==b"ExtendFont": |
448 | | -effects["extend"]=float(next(words)) |
449 | | - |
450 | | -# Verify some properties of the line that would cause it to be ignored |
451 | | -# otherwise. |
452 | | -iffontfileisnotNone: |
453 | | -iffontfile.endswith((b".ttf",b".ttc")): |
454 | | -is_truetype=True |
455 | | -elifnotfontfile.endswith(b".otf"): |
456 | | -is_t1=True |
457 | | -elifbasenameisnotNone: |
458 | | -is_t1=True |
459 | | -ifis_truetypeandis_subsettedandencodingfileisNone: |
460 | | -return |
461 | | -ifnotis_t1and ("slant"ineffectsor"extend"ineffects): |
462 | | -return |
463 | | -ifabs(effects.get("slant",0))>1: |
464 | | -return |
465 | | -ifabs(effects.get("extend",0))>2: |
466 | | -return |
467 | | - |
468 | | -ifbasenameisNone: |
469 | | -basename=tfmname |
470 | | -ifencodingfileisnotNone: |
471 | | -encodingfile=_find_tex_file(encodingfile) |
472 | | -iffontfileisnotNone: |
473 | | -fontfile=_find_tex_file(fontfile) |
474 | | -self._parsed[tfmname]=PsFont( |
475 | | -texname=tfmname,psname=basename,effects=effects, |
476 | | -encoding=encodingfile,filename=fontfile) |
477 | | -returnTrue |
478 | | - |
479 | | - |
480 | 299 | def_parse_enc(path): |
481 | 300 | r""" |
482 | 301 | Parse a \*.enc file referenced from a psfonts.map style file. |
|