python/book_latex.py

   1 # -*- coding: utf-8 -*-
   2
   3 import re
   4 import tempfile
   5 import os
   6 import book_base as BookBase
   7 from book_snippets import *
   8 import lilylib as ly
   9 global _;_=ly._
  10
  11 progress = ly.progress
  12 warning = ly.warning
  13 error = ly.error
  14
  15 # Recognize special sequences in the input.
  16 #
  17 #   (?P<name>regex) -- Assign result of REGEX to NAME.
  18 #   *? -- Match non-greedily.
  19 #   (?!...) -- Match if `...' doesn't match next (without consuming
  20 #              the string).
  21 #
  22 #   (?m) -- Multiline regex: Make ^ and $ match at each line.
  23 #   (?s) -- Make the dot match all characters including newline.
  24 #   (?x) -- Ignore whitespace in patterns.
  25 # Possible keys are:
  26 #     'multiline_comment', 'verbatim', 'lilypond_block', 'singleline_comment',
  27 #     'lilypond_file', 'include', 'lilypond', 'lilypondversion'
  28 Latex_snippet_res = {
  29     'include':
  30          r'''(?smx)
  31           ^[^%\n]*?
  32           (?P<match>
  33           \\input\s*{
  34            (?P<filename>\S+?)
  35           })''',
  36
  37     'lilypond':
  38          r'''(?smx)
  39           ^[^%\n]*?
  40           (?P<match>
  41           \\lilypond\s*(
  42           \[
  43            \s*(?P<options>.*?)\s*
  44           \])?\s*{
  45            (?P<code>.*?)
  46           })''',
  47
  48     'lilypond_block':
  49          r'''(?smx)
  50           ^[^%\n]*?
  51           (?P<match>
  52           \\begin\s*(?P<env>{lilypond}\s*)?(
  53           \[
  54            \s*(?P<options>.*?)\s*
  55           \])?(?(env)|\s*{lilypond})
  56            (?P<code>.*?)
  57           ^[^%\n]*?
  58           \\end\s*{lilypond})''',
  59
  60     'lilypond_file':
  61          r'''(?smx)
  62           ^[^%\n]*?
  63           (?P<match>
  64           \\lilypondfile\s*(
  65           \[
  66            \s*(?P<options>.*?)\s*
  67           \])?\s*\{
  68            (?P<filename>\S+?)
  69           })''',
  70
  71     'singleline_comment':
  72          r'''(?mx)
  73           ^.*?
  74           (?P<match>
  75            (?P<code>
  76            %.*$\n+))''',
  77
  78     'verb':
  79          r'''(?mx)
  80           ^[^%\n]*?
  81           (?P<match>
  82            (?P<code>
  83            \\verb(?P<del>.)
  84             .*?
  85            (?P=del)))''',
  86
  87     'verbatim':
  88          r'''(?msx)
  89           ^[^%\n]*?
  90           (?P<match>
  91            (?P<code>
  92            \\begin\s*{verbatim}
  93             .*?
  94            \\end\s*{verbatim}))''',
  95
  96     'lilypondversion':
  97          r'''(?smx)
  98           (?P<match>
  99           \\lilypondversion)[^a-zA-Z]''',
 100 }
 101
 102 Latex_output = {
 103     FILTER: r'''\begin{lilypond}[%(options)s]
 104 %(code)s
 105 \end{lilypond}''',
 106
 107     OUTPUT: r'''{%%
 108 \parindent 0pt
 109 \ifx\preLilyPondExample \undefined
 110 \else
 111   \expandafter\preLilyPondExample
 112 \fi
 113 \def\lilypondbook{}%%
 114 \input %(base)s-systems.tex
 115 \ifx\postLilyPondExample \undefined
 116 \else
 117   \expandafter\postLilyPondExample
 118 \fi
 119 }''',
 120
 121     PRINTFILENAME: '''\\texttt{%(filename)s}
 122 ''',
 123
 124     QUOTE: r'''\begin{quotation}
 125 %(str)s
 126 \end{quotation}''',
 127
 128     VERBATIM: r'''\noindent
 129 \begin{verbatim}%(verb)s\end{verbatim}
 130 ''',
 131
 132     VERSION: r'''%(program_version)s''',
 133 }
 134
 135
 136
 137
 138
 139 ###
 140 # Retrieve dimensions from LaTeX
 141 LATEX_INSPECTION_DOCUMENT = r'''
 142 \nonstopmode
 143 %(preamble)s
 144 \begin{document}
 145 \typeout{textwidth=\the\textwidth}
 146 \typeout{columnsep=\the\columnsep}
 147 \makeatletter\if@twocolumn\typeout{columns=2}\fi\makeatother
 148 \end{document}
 149 '''
 150
 151 # Do we need anything else besides `textwidth'?
 152 def get_latex_textwidth (source, global_options):
 153     m = re.search (r'''(?P<preamble>\\begin\s*{document})''', source)
 154     if m == None:
 155         warning (_ ("cannot find \\begin{document} in LaTeX document"))
 156
 157         ## what's a sensible default?
 158         return 550.0
 159
 160     preamble = source[:m.start (0)]
 161     latex_document = LATEX_INSPECTION_DOCUMENT % {'preamble': preamble}
 162
 163     (handle, tmpfile) = tempfile.mkstemp('.tex')
 164     logfile = os.path.splitext (tmpfile)[0] + '.log'
 165     logfile = os.path.split (logfile)[1]
 166
 167     tmp_handle = os.fdopen (handle,'w')
 168     tmp_handle.write (latex_document)
 169     tmp_handle.close ()
 170
 171     ly.system ('%s %s' % (global_options.latex_program, tmpfile),
 172                be_verbose=global_options.verbose)
 173     parameter_string = file (logfile).read()
 174
 175     os.unlink (tmpfile)
 176     os.unlink (logfile)
 177
 178     columns = 0
 179     m = re.search ('columns=([0-9.]+)', parameter_string)
 180     if m:
 181         columns = int (m.group (1))
 182
 183     columnsep = 0
 184     m = re.search ('columnsep=([0-9.]+)pt', parameter_string)
 185     if m:
 186         columnsep = float (m.group (1))
 187
 188     textwidth = 0
 189     m = re.search ('textwidth=([0-9.]+)pt', parameter_string)
 190     if m:
 191         textwidth = float (m.group (1))
 192         if columns:
 193             textwidth = (textwidth - columnsep) / columns
 194
 195     return textwidth
 196
 197
 198 def modify_preamble (chunk):
 199     str = chunk.replacement_text ()
 200     if (re.search (r"\\begin *{document}", str)
 201       and not re.search ("{graphic[sx]", str)):
 202         str = re.sub (r"\\begin{document}",
 203                r"\\usepackage{graphics}" + '\n'
 204                + r"\\begin{document}",
 205                str)
 206         chunk.override_text = str
 207
 208
 209
 210
 211
 212
 213 class BookLatexOutputFormat (BookBase.BookOutputFormat):
 214     def __init__ (self):
 215         BookBase.BookOutputFormat.__init__ (self)
 216         self.format = "latex"
 217         self.default_extension = ".tex"
 218         self.snippet_res = Latex_snippet_res
 219         self.output = Latex_output
 220         self.handled_extensions = ['.latex', '.lytex', '.tex']
 221         self.image_formats = "ps"
 222         self.snippet_option_separator = '\s*,\s*'
 223
 224     def process_options (self, global_options):
 225         self.process_options_pdfnotdefault (global_options)
 226
 227     def get_line_width (self, source):
 228         textwidth = get_latex_textwidth (source, self.global_options)
 229         return '%.0f\\pt' % textwidth
 230
 231     def input_fullname (self, input_filename):
 232         # Use kpsewhich if available, otherwise fall back to the default:
 233         if ly.search_exe_path ('kpsewhich'):
 234             return os.popen ('kpsewhich ' + input_filename).read()[:-1]
 235         else:
 236             return BookBase.BookOutputFormat.input_fullname (self, input_filename)
 237
 238     def process_chunks (self, chunks):
 239         for c in chunks:
 240             if (c.is_plain () and
 241               re.search (r"\\begin *{document}", c.replacement_text())):
 242                 modify_preamble (c)
 243                 break
 244         return chunks
 245
 246     def snippet_output (self, basename, snippet):
 247         str = ''
 248         rep = snippet.get_replacements ();
 249         rep['base'] = basename
 250         str += self.output_print_filename (basename, snippet)
 251         if VERBATIM in snippet.option_dict:
 252             rep['verb'] = snippet.verb_ly ()
 253             str += self.output[VERBATIM] % rep
 254
 255         str += self.output[OUTPUT] % rep
 256
 257         ## todo: maintain breaks
 258         if 0:
 259             breaks = snippet.ly ().count ("\n")
 260             str += "".ljust (breaks, "\n").replace ("\n","%\n")
 261
 262         if QUOTE in snippet.option_dict:
 263             str = self.output[QUOTE] % {'str': str}
 264         return str
 265
 266
 267
 268
 269 BookBase.register_format (BookLatexOutputFormat ());