python/book_snippets.py

   1 # -*- coding: utf-8 -*-
   2
   3 import book_base as BookBase
   4 import lilylib as ly
   5 global _;_=ly._
   6 import re
   7 import os
   8 import copy
   9 from subprocess import Popen, PIPE
  10
  11 progress = ly.progress
  12 warning = ly.warning
  13 error = ly.error
  14
  15
  16
  17
  18
  19 ####################################################################
  20 # Snippet option handling
  21 ####################################################################
  22
  23
  24 #
  25 # Is this pythonic?  Personally, I find this rather #define-nesque. --hwn
  26 #
  27 # Global definitions:
  28 ADDVERSION = 'addversion'
  29 AFTER = 'after'
  30 ALT = 'alt'
  31 BEFORE = 'before'
  32 DOCTITLE = 'doctitle'
  33 EXAMPLEINDENT = 'exampleindent'
  34 FILENAME = 'filename'
  35 FILTER = 'filter'
  36 FRAGMENT = 'fragment'
  37 LANG = 'lang'    ## TODO: This is handled nowhere!
  38 LAYOUT = 'layout'
  39 LILYQUOTE = 'lilyquote'
  40 LINE_WIDTH = 'line-width'
  41 NOFRAGMENT = 'nofragment'
  42 NOGETTEXT = 'nogettext'
  43 NOINDENT = 'noindent'
  44 NOQUOTE = 'noquote'
  45 INDENT = 'indent'
  46 NORAGGED_RIGHT = 'noragged-right'
  47 NOTES = 'body'
  48 NOTIME = 'notime'
  49 OUTPUT = 'output'
  50 OUTPUTIMAGE = 'outputimage'
  51 PAPER = 'paper'
  52 PREAMBLE = 'preamble'
  53 PRINTFILENAME = 'printfilename'
  54 QUOTE = 'quote'
  55 RAGGED_RIGHT = 'ragged-right'
  56 RELATIVE = 'relative'
  57 STAFFSIZE = 'staffsize'
  58 TEXIDOC = 'texidoc'
  59 VERBATIM = 'verbatim'
  60 VERSION = 'lilypondversion'
  61
  62
  63
  64 # NOTIME and NOGETTEXT have no opposite so they aren't part of this
  65 # dictionary.
  66 # NOQUOTE is used internally only.
  67 no_options = {
  68     NOFRAGMENT: FRAGMENT,
  69     NOINDENT: INDENT,
  70 }
  71
  72 # Options that have no impact on processing by lilypond (or --process
  73 # argument)
  74 PROCESSING_INDEPENDENT_OPTIONS = (
  75     ALT, NOGETTEXT, VERBATIM, ADDVERSION,
  76     TEXIDOC, DOCTITLE, VERSION, PRINTFILENAME)
  77
  78
  79
  80 # Options without a pattern in snippet_options.
  81 simple_options = [
  82     EXAMPLEINDENT,
  83     FRAGMENT,
  84     NOFRAGMENT,
  85     NOGETTEXT,
  86     NOINDENT,
  87     PRINTFILENAME,
  88     DOCTITLE,
  89     TEXIDOC,
  90     LANG,
  91     VERBATIM,
  92     FILENAME,
  93     ALT,
  94     ADDVERSION
  95 ]
  96
  97
  98
  99 ####################################################################
 100 # LilyPond templates for the snippets
 101 ####################################################################
 102
 103 snippet_options = {
 104     ##
 105     NOTES: {
 106         RELATIVE: r'''\relative c%(relative_quotes)s''',
 107     },
 108
 109     ##
 110     PAPER: {
 111         INDENT: r'''indent = %(indent)s''',
 112         LINE_WIDTH: r'''line-width = %(line-width)s''',
 113         QUOTE: r'''line-width = %(line-width)s - 2.0 * %(exampleindent)s''',
 114         LILYQUOTE: r'''line-width = %(line-width)s - 2.0 * %(exampleindent)s''',
 115         RAGGED_RIGHT: r'''ragged-right = ##t''',
 116         NORAGGED_RIGHT: r'''ragged-right = ##f''',
 117     },
 118
 119     ##
 120     LAYOUT: {
 121         NOTIME: r'''
 122  \context {
 123    \Score
 124    timing = ##f
 125  }
 126  \context {
 127    \Staff
 128    \remove "Time_signature_engraver"
 129  }''',
 130     },
 131
 132     ##
 133     PREAMBLE: {
 134         STAFFSIZE: r'''#(set-global-staff-size %(staffsize)s)''',
 135     },
 136 }
 137
 138
 139
 140
 141
 142 FRAGMENT_LY = r'''
 143 %(notes_string)s
 144 {
 145
 146
 147 %% ****************************************************************
 148 %% ly snippet contents follows:
 149 %% ****************************************************************
 150 %(code)s
 151
 152
 153 %% ****************************************************************
 154 %% end ly snippet
 155 %% ****************************************************************
 156 }
 157 '''
 158
 159 def classic_lilypond_book_compatibility (key, value):
 160     if key == 'singleline' and value == None:
 161         return (RAGGED_RIGHT, None)
 162
 163     m = re.search ('relative\s*([-0-9])', key)
 164     if m:
 165         return ('relative', m.group (1))
 166
 167     m = re.match ('([0-9]+)pt', key)
 168     if m:
 169         return ('staffsize', m.group (1))
 170
 171     if key == 'indent' or key == 'line-width':
 172         m = re.match ('([-.0-9]+)(cm|in|mm|pt|staffspace)', value)
 173         if m:
 174             f = float (m.group (1))
 175             return (key, '%f\\%s' % (f, m.group (2)))
 176
 177     return (None, None)
 178
 179
 180 PREAMBLE_LY = '''%%%% Generated by %(program_name)s
 181 %%%% Options: [%(option_string)s]
 182 \\include "lilypond-book-preamble.ly"
 183
 184
 185 %% ****************************************************************
 186 %% Start cut-&-pastable-section
 187 %% ****************************************************************
 188
 189 %(preamble_string)s
 190
 191 \paper {
 192   %(paper_string)s
 193   force-assignment = #""
 194   line-width = #(- line-width (* mm  %(padding_mm)f))
 195 }
 196
 197 \layout {
 198   %(layout_string)s
 199 }
 200 '''
 201
 202
 203 FULL_LY = '''
 204
 205
 206 %% ****************************************************************
 207 %% ly snippet:
 208 %% ****************************************************************
 209 %(code)s
 210
 211
 212 %% ****************************************************************
 213 %% end ly snippet
 214 %% ****************************************************************
 215 '''
 216
 217
 218
 219
 220
 221
 222
 223
 224 ####################################################################
 225 # Helper functions
 226 ####################################################################
 227
 228 def ps_page_count (ps_name):
 229     header = file (ps_name).read (1024)
 230     m = re.search ('\n%%Pages: ([0-9]+)', header)
 231     if m:
 232         return int (m.group (1))
 233     return 0
 234
 235 ly_var_def_re = re.compile (r'^([a-zA-Z]+)[\t ]*=', re.M)
 236 ly_comment_re = re.compile (r'(%+[\t ]*)(.*)$', re.M)
 237 ly_context_id_re = re.compile ('\\\\(?:new|context)\\s+(?:[a-zA-Z]*?(?:Staff\
 238 (?:Group)?|Voice|FiguredBass|FretBoards|Names|Devnull))\\s+=\\s+"?([a-zA-Z]+)"?\\s+')
 239
 240 def ly_comment_gettext (t, m):
 241     return m.group (1) + t (m.group (2))
 242
 243
 244
 245 class CompileError(Exception):
 246   pass
 247
 248
 249
 250 ####################################################################
 251 # Snippet classes
 252 ####################################################################
 253
 254 class Chunk:
 255     def replacement_text (self):
 256         return ''
 257
 258     def filter_text (self):
 259         return self.replacement_text ()
 260
 261     def is_plain (self):
 262         return False
 263
 264 class Substring (Chunk):
 265     """A string that does not require extra memory."""
 266     def __init__ (self, source, start, end, line_number):
 267         self.source = source
 268         self.start = start
 269         self.end = end
 270         self.line_number = line_number
 271         self.override_text = None
 272
 273     def is_plain (self):
 274         return True
 275
 276     def replacement_text (self):
 277         if self.override_text:
 278             return self.override_text
 279         else:
 280             return self.source[self.start:self.end]
 281
 282
 283
 284 class Snippet (Chunk):
 285     def __init__ (self, type, match, formatter, line_number, global_options):
 286         self.type = type
 287         self.match = match
 288         self.checksum = 0
 289         self.option_dict = {}
 290         self.formatter = formatter
 291         self.line_number = line_number
 292         self.global_options = global_options
 293         self.replacements = {'program_version': ly.program_version,
 294                              'program_name': ly.program_name}
 295
 296     # return a shallow copy of the replacements, so the caller can modify
 297     # it locally without interfering with other snippet operations
 298     def get_replacements (self):
 299         return copy.copy (self.replacements)
 300
 301     def replacement_text (self):
 302         return self.match.group ('match')
 303
 304     def substring (self, s):
 305         return self.match.group (s)
 306
 307     def __repr__ (self):
 308         return `self.__class__` + ' type = ' + self.type
 309
 310
 311
 312 class IncludeSnippet (Snippet):
 313     def processed_filename (self):
 314         f = self.substring ('filename')
 315         return os.path.splitext (f)[0] + self.formatter.default_extension
 316
 317     def replacement_text (self):
 318         s = self.match.group ('match')
 319         f = self.substring ('filename')
 320         return re.sub (f, self.processed_filename (), s)
 321
 322
 323
 324 class LilypondSnippet (Snippet):
 325     def __init__ (self, type, match, formatter, line_number, global_options):
 326         Snippet.__init__ (self, type, match, formatter, line_number, global_options)
 327         os = match.group ('options')
 328         self.do_options (os, self.type)
 329
 330
 331     def snippet_options (self):
 332         return [];
 333
 334     def verb_ly_gettext (self, s):
 335         lang = self.formatter.document_language
 336         if not lang:
 337             return s
 338         try:
 339             t = langdefs.translation[lang]
 340         except:
 341             return s
 342
 343         s = ly_comment_re.sub (lambda m: ly_comment_gettext (t, m), s)
 344
 345         if langdefs.LANGDICT[lang].enable_ly_identifier_l10n:
 346             for v in ly_var_def_re.findall (s):
 347                 s = re.sub (r"(?m)(?<!\\clef)(^|[' \\#])%s([^a-zA-Z])" % v,
 348                             "\\1" + t (v) + "\\2",
 349                             s)
 350             for id in ly_context_id_re.findall (s):
 351                 s = re.sub (r'(\s+|")%s(\s+|")' % id,
 352                             "\\1" + t (id) + "\\2",
 353                             s)
 354         return s
 355
 356     def verb_ly (self):
 357         verb_text = self.substring ('code')
 358         if not NOGETTEXT in self.option_dict:
 359             verb_text = self.verb_ly_gettext (verb_text)
 360         if not verb_text.endswith ('\n'):
 361             verb_text += '\n'
 362         return verb_text
 363
 364     def ly (self):
 365         contents = self.substring ('code')
 366         return ('\\sourcefileline %d\n%s'
 367                 % (self.line_number - 1, contents))
 368
 369     def full_ly (self):
 370         s = self.ly ()
 371         if s:
 372             return self.compose_ly (s)
 373         return ''
 374
 375     def split_options (self, option_string):
 376         return self.formatter.split_snippet_options (option_string);
 377
 378     def do_options (self, option_string, type):
 379         self.option_dict = {}
 380
 381         options = self.split_options (option_string)
 382
 383         for option in options:
 384             if '=' in option:
 385                 (key, value) = re.split ('\s*=\s*', option)
 386                 self.option_dict[key] = value
 387             else:
 388                 if option in no_options:
 389                     if no_options[option] in self.option_dict:
 390                         del self.option_dict[no_options[option]]
 391                 else:
 392                     self.option_dict[option] = None
 393
 394
 395         # If LINE_WIDTH is used without parameter, set it to default.
 396         has_line_width = self.option_dict.has_key (LINE_WIDTH)
 397         if has_line_width and self.option_dict[LINE_WIDTH] == None:
 398             has_line_width = False
 399             del self.option_dict[LINE_WIDTH]
 400
 401         # TODO: Can't we do that more efficiently (built-in python func?)
 402         for k in self.formatter.default_snippet_options:
 403             if k not in self.option_dict:
 404                 self.option_dict[k] = self.formatter.default_snippet_options[k]
 405
 406         # RELATIVE does not work without FRAGMENT;
 407         # make RELATIVE imply FRAGMENT
 408         has_relative = self.option_dict.has_key (RELATIVE)
 409         if has_relative and not self.option_dict.has_key (FRAGMENT):
 410             self.option_dict[FRAGMENT] = None
 411
 412         if not has_line_width:
 413             if type == 'lilypond' or FRAGMENT in self.option_dict:
 414                 self.option_dict[RAGGED_RIGHT] = None
 415
 416             if type == 'lilypond':
 417                 if LINE_WIDTH in self.option_dict:
 418                     del self.option_dict[LINE_WIDTH]
 419             else:
 420                 if RAGGED_RIGHT in self.option_dict:
 421                     if LINE_WIDTH in self.option_dict:
 422                         del self.option_dict[LINE_WIDTH]
 423
 424             if QUOTE in self.option_dict or type == 'lilypond':
 425                 if LINE_WIDTH in self.option_dict:
 426                     del self.option_dict[LINE_WIDTH]
 427
 428         if not INDENT in self.option_dict:
 429             self.option_dict[INDENT] = '0\\mm'
 430
 431         # Set a default line-width if there is none. We need this, because
 432         # lilypond-book has set left-padding by default and therefore does
 433         # #(define line-width (- line-width (* 3 mm)))
 434         # TODO: Junk this ugly hack if the code gets rewritten to concatenate
 435         # all settings before writing them in the \paper block.
 436         if not LINE_WIDTH in self.option_dict:
 437             if not QUOTE in self.option_dict:
 438                 if not LILYQUOTE in self.option_dict:
 439                     self.option_dict[LINE_WIDTH] = "#(- paper-width \
 440 left-margin-default right-margin-default)"
 441
 442     def get_option_list (self):
 443         if not 'option_list' in self.__dict__:
 444             option_list = []
 445             for (key, value) in self.option_dict.items ():
 446                 if value == None:
 447                     option_list.append (key)
 448                 else:
 449                     option_list.append (key + '=' + value)
 450             option_list.sort ()
 451             self.option_list = option_list
 452         return self.option_list
 453
 454     def compose_ly (self, code):
 455         if FRAGMENT in self.option_dict:
 456             body = FRAGMENT_LY
 457         else:
 458             body = FULL_LY
 459
 460         # Defaults.
 461         relative = 1
 462         override = {}
 463         # The original concept of the `exampleindent' option is broken.
 464         # It is not possible to get a sane value for @exampleindent at all
 465         # without processing the document itself.  Saying
 466         #
 467         #   @exampleindent 0
 468         #   @example
 469         #   ...
 470         #   @end example
 471         #   @exampleindent 5
 472         #
 473         # causes ugly results with the DVI backend of texinfo since the
 474         # default value for @exampleindent isn't 5em but 0.4in (or a smaller
 475         # value).  Executing the above code changes the environment
 476         # indentation to an unknown value because we don't know the amount
 477         # of 1em in advance since it is font-dependent.  Modifying
 478         # @exampleindent in the middle of a document is simply not
 479         # supported within texinfo.
 480         #
 481         # As a consequence, the only function of @exampleindent is now to
 482         # specify the amount of indentation for the `quote' option.
 483         #
 484         # To set @exampleindent locally to zero, we use the @format
 485         # environment for non-quoted snippets.
 486         override[EXAMPLEINDENT] = r'0.4\in'
 487         override[LINE_WIDTH] = '5\\in' # = texinfo_line_widths['@smallbook']
 488         override.update (self.formatter.default_snippet_options)
 489
 490         option_list = []
 491         for option in self.get_option_list ():
 492             for name in PROCESSING_INDEPENDENT_OPTIONS:
 493                 if option.startswith (name):
 494                     break
 495             else:
 496                 option_list.append (option)
 497         option_string = ','.join (option_list)
 498         compose_dict = {}
 499         compose_types = [NOTES, PREAMBLE, LAYOUT, PAPER]
 500         for a in compose_types:
 501             compose_dict[a] = []
 502
 503         option_names = self.option_dict.keys ()
 504         option_names.sort ()
 505         for key in option_names:
 506             value = self.option_dict[key]
 507             (c_key, c_value) = classic_lilypond_book_compatibility (key, value)
 508             if c_key:
 509                 if c_value:
 510                     warning (
 511                         _ ("deprecated ly-option used: %s=%s") % (key, value))
 512                     warning (
 513                         _ ("compatibility mode translation: %s=%s") % (c_key, c_value))
 514                 else:
 515                     warning (
 516                         _ ("deprecated ly-option used: %s") % key)
 517                     warning (
 518                         _ ("compatibility mode translation: %s") % c_key)
 519
 520                 (key, value) = (c_key, c_value)
 521
 522             if value:
 523                 override[key] = value
 524             else:
 525                 if not override.has_key (key):
 526                     override[key] = None
 527
 528             found = 0
 529             for typ in compose_types:
 530                 if snippet_options[typ].has_key (key):
 531                     compose_dict[typ].append (snippet_options[typ][key])
 532                     found = 1
 533                     break
 534
 535             if not found and key not in simple_options and key not in self.snippet_options ():
 536                 warning (_ ("ignoring unknown ly option: %s") % key)
 537
 538         # URGS
 539         if RELATIVE in override and override[RELATIVE]:
 540             relative = int (override[RELATIVE])
 541
 542         relative_quotes = ''
 543
 544         # 1 = central C
 545         if relative < 0:
 546             relative_quotes += ',' * (- relative)
 547         elif relative > 0:
 548             relative_quotes += "'" * relative
 549
 550         paper_string = '\n  '.join (compose_dict[PAPER]) % override
 551         layout_string = '\n  '.join (compose_dict[LAYOUT]) % override
 552         notes_string = '\n  '.join (compose_dict[NOTES]) % vars ()
 553         preamble_string = '\n  '.join (compose_dict[PREAMBLE]) % override
 554         padding_mm = self.global_options.padding_mm
 555
 556         d = globals().copy()
 557         d.update (locals())
 558         d.update (self.global_options.information)
 559         return (PREAMBLE_LY + body) % d
 560
 561     def get_checksum (self):
 562         if not self.checksum:
 563             # Work-around for md5 module deprecation warning in python 2.5+:
 564             try:
 565                 from hashlib import md5
 566             except ImportError:
 567                 from md5 import md5
 568
 569             # We only want to calculate the hash based on the snippet
 570             # code plus fragment options relevant to processing by
 571             # lilypond, not the snippet + preamble
 572             hash = md5 (self.relevant_contents (self.ly ()))
 573             for option in self.get_option_list ():
 574                 for name in PROCESSING_INDEPENDENT_OPTIONS:
 575                     if option.startswith (name):
 576                         break
 577                 else:
 578                     hash.update (option)
 579
 580             ## let's not create too long names.
 581             self.checksum = hash.hexdigest ()[:10]
 582
 583         return self.checksum
 584
 585     def basename (self):
 586         cs = self.get_checksum ()
 587         name = '%s/lily-%s' % (cs[:2], cs[2:])
 588         return name
 589
 590     final_basename = basename
 591
 592     def write_ly (self):
 593         base = self.basename ()
 594         path = os.path.join (self.global_options.lily_output_dir, base)
 595         directory = os.path.split(path)[0]
 596         if not os.path.isdir (directory):
 597             os.makedirs (directory)
 598         filename = path + '.ly'
 599         if os.path.exists (filename):
 600             diff_against_existing = self.filter_pipe (self.full_ly (), 'diff -u %s -' % filename)
 601             if diff_against_existing:
 602                 warning ("%s: duplicate filename but different contents of orginal file,\n\
 603 printing diff against existing file." % filename)
 604                 ly.stderr_write (diff_against_existing)
 605         else:
 606             out = file (filename, 'w')
 607             out.write (self.full_ly ())
 608             file (path + '.txt', 'w').write ('image of music')
 609
 610     def relevant_contents (self, ly):
 611         return re.sub (r'\\(version|sourcefileline|sourcefilename)[^\n]*\n', '', ly)
 612
 613     def link_all_output_files (self, output_dir, output_dir_files, destination):
 614         existing, missing = self.all_output_files (output_dir, output_dir_files)
 615         if missing:
 616             print '\nMissing', missing
 617             raise CompileError(self.basename())
 618         for name in existing:
 619             if (self.global_options.use_source_file_names
 620                 and isinstance (self, LilypondFileSnippet)):
 621                 base, ext = os.path.splitext (name)
 622                 components = base.split ('-')
 623                 # ugh, assume filenames with prefix with one dash (lily-xxxx)
 624                 if len (components) > 2:
 625                     base_suffix = '-' + components[-1]
 626                 else:
 627                     base_suffix = ''
 628                 final_name = self.final_basename () + base_suffix + ext
 629             else:
 630                 final_name = name
 631             try:
 632                 os.unlink (os.path.join (destination, final_name))
 633             except OSError:
 634                 pass
 635
 636             src = os.path.join (output_dir, name)
 637             dst = os.path.join (destination, final_name)
 638             dst_path = os.path.split(dst)[0]
 639             if not os.path.isdir (dst_path):
 640                 os.makedirs (dst_path)
 641             os.link (src, dst)
 642
 643
 644     def all_output_files (self, output_dir, output_dir_files):
 645         """Return all files generated in lily_output_dir, a set.
 646
 647         output_dir_files is the list of files in the output directory.
 648         """
 649         result = set ()
 650         missing = set ()
 651         base = self.basename()
 652         full = os.path.join (output_dir, base)
 653         def consider_file (name):
 654             if name in output_dir_files:
 655                 result.add (name)
 656
 657         def require_file (name):
 658             if name in output_dir_files:
 659                 result.add (name)
 660             else:
 661                 missing.add (name)
 662
 663         # UGH - junk self.global_options
 664         skip_lily = self.global_options.skip_lilypond_run
 665         for required in [base + '.ly',
 666                          base + '.txt']:
 667             require_file (required)
 668         if not skip_lily:
 669             require_file (base + '-systems.count')
 670
 671         if 'ddump-profile' in self.global_options.process_cmd:
 672             require_file (base + '.profile')
 673         if 'dseparate-log-file' in self.global_options.process_cmd:
 674             require_file (base + '.log')
 675
 676         map (consider_file, [base + '.tex',
 677                              base + '.eps',
 678                              base + '.texidoc',
 679                              base + '.doctitle',
 680                              base + '-systems.texi',
 681                              base + '-systems.tex',
 682                              base + '-systems.pdftexi'])
 683         if self.formatter.document_language:
 684             map (consider_file,
 685                  [base + '.texidoc' + self.formatter.document_language,
 686                   base + '.doctitle' + self.formatter.document_language])
 687
 688         required_files = self.formatter.required_files (self, base, full, result)
 689         for f in required_files:
 690             require_file (f)
 691
 692         system_count = 0
 693         if not skip_lily and not missing:
 694             system_count = int(file (full + '-systems.count').read())
 695
 696         for number in range(1, system_count + 1):
 697             systemfile = '%s-%d' % (base, number)
 698             require_file (systemfile + '.eps')
 699             consider_file (systemfile + '.pdf')
 700
 701             # We can't require signatures, since books and toplevel
 702             # markups do not output a signature.
 703             if 'ddump-signature' in self.global_options.process_cmd:
 704                 consider_file (systemfile + '.signature')
 705
 706
 707         return (result, missing)
 708
 709     def is_outdated (self, output_dir, current_files):
 710         found, missing = self.all_output_files (output_dir, current_files)
 711         return missing
 712
 713     def filter_pipe (self, input, cmd):
 714         """Pass input through cmd, and return the result."""
 715
 716         if self.global_options.verbose:
 717             progress (_ ("Opening filter `%s'\n") % cmd)
 718
 719         #(stdin, stdout, stderr) = os.popen3 (cmd)
 720
 721         p = Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True)
 722         (stdin, stdout, stderr) = (p.stdin, p.stdout, p.stderr)
 723         stdin.write (input)
 724         status = stdin.close ()
 725
 726         if not status:
 727             status = 0
 728             output = stdout.read ()
 729             status = stdout.close ()
 730             error = stderr.read ()
 731
 732         if not status:
 733             status = 0
 734         signal = 0x0f & status
 735         if status or (not output and error):
 736             exit_status = status >> 8
 737             error (_ ("`%s' failed (%d)") % (cmd, exit_status))
 738             error (_ ("The error log is as follows:"))
 739             ly.stderr_write (error)
 740             ly.stderr_write (stderr.read ())
 741             exit (status)
 742
 743         if self.global_options.verbose:
 744             progress ('\n')
 745
 746         return output
 747
 748     def get_snippet_code (self):
 749         return self.substring ('code');
 750
 751     def filter_text (self):
 752         """Run snippet bodies through a command (say: convert-ly).
 753
 754         This functionality is rarely used, and this code must have bitrot.
 755         """
 756         code = self.get_snippet_code ();
 757         s = self.filter_pipe (code, self.global_options.filter_cmd)
 758         d = {
 759             'code': s,
 760             'options': self.match.group ('options')
 761         }
 762         return self.formatter.output_simple_replacements (FILTER, d)
 763
 764     def replacement_text (self):
 765         base = self.final_basename ()
 766         return self.formatter.snippet_output (base, self)
 767
 768     def get_images (self):
 769         rep = {'base': self.final_basename ()}
 770
 771         single = '%(base)s.png' % rep
 772         multiple = '%(base)s-page1.png' % rep
 773         images = (single,)
 774         if (os.path.exists (multiple)
 775             and (not os.path.exists (single)
 776                  or (os.stat (multiple)[stat.ST_MTIME]
 777                      > os.stat (single)[stat.ST_MTIME]))):
 778             count = ps_page_count ('%(base)s.eps' % rep)
 779             images = ['%s-page%d.png' % (rep['base'], page) for page in range (1, count+1)]
 780             images = tuple (images)
 781
 782         return images
 783
 784
 785
 786 re_begin_verbatim = re.compile (r'\s+%.*?begin verbatim.*\n*', re.M)
 787 re_end_verbatim = re.compile (r'\s+%.*?end verbatim.*$', re.M)
 788
 789 class LilypondFileSnippet (LilypondSnippet):
 790     def __init__ (self, type, match, formatter, line_number, global_options):
 791         LilypondSnippet.__init__ (self, type, match, formatter, line_number, global_options)
 792         self.contents = file (BookBase.find_file (self.substring ('filename'), global_options.include_path)).read ()
 793
 794     def get_snippet_code (self):
 795         return self.contents;
 796
 797     def verb_ly (self):
 798         s = self.contents
 799         s = re_begin_verbatim.split (s)[-1]
 800         s = re_end_verbatim.split (s)[0]
 801         if not NOGETTEXT in self.option_dict:
 802             s = self.verb_ly_gettext (s)
 803         if not s.endswith ('\n'):
 804             s += '\n'
 805         return s
 806
 807     def ly (self):
 808         name = self.substring ('filename')
 809         return ('\\sourcefilename \"%s\"\n\\sourcefileline 0\n%s'
 810                 % (name, self.contents))
 811
 812     def final_basename (self):
 813         if self.global_options.use_source_file_names:
 814             base = os.path.splitext (os.path.basename (self.substring ('filename')))[0]
 815             return base
 816         else:
 817             return self.basename ()
 818
 819
 820 class LilyPondVersionString (Snippet):
 821     """A string that does not require extra memory."""
 822     def __init__ (self, type, match, formatter, line_number, global_options):
 823         Snippet.__init__ (self, type, match, formatter, line_number, global_options)
 824
 825     def replacement_text (self):
 826         return self.formatter.output_simple (self.type, self)
 827
 828
 829 snippet_type_to_class = {
 830     'lilypond_file': LilypondFileSnippet,
 831     'lilypond_block': LilypondSnippet,
 832     'lilypond': LilypondSnippet,
 833     'include': IncludeSnippet,
 834     'lilypondversion': LilyPondVersionString,
 835 }