3172 lines
96 KiB
Python
3172 lines
96 KiB
Python
#! /usr/bin/env python3
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# math2html: convert LaTeX equations to HTML output.
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#
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# Copyright (C) 2009-2011 Alex Fernández, 2021 Günter Milde
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#
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# Released under the terms of the `2-Clause BSD license'_, in short:
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# Copying and distribution of this file, with or without modification,
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# are permitted in any medium without royalty provided the copyright
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# notice and this notice are preserved.
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# This file is offered as-is, without any warranty.
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#
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# .. _2-Clause BSD license: https://opensource.org/licenses/BSD-2-Clause
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# Based on eLyXer: convert LyX source files to HTML output.
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# http://alexfernandez.github.io/elyxer/
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# Versions:
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# 1.2.5 2015-02-26 eLyXer standalone formula conversion to HTML.
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# 1.3 2021-06-02 Removed code for conversion of LyX files not
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# required for LaTeX math.
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# Support for more math commands from the AMS "math-guide".
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# 2.0 2021-12-31 Drop 2.7 compatibility code.
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import os.path
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import sys
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import unicodedata
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from docutils.utils.math import tex2unichar
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__version__ = '1.3 (2021-06-02)'
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class Trace:
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"A tracing class"
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debugmode = False
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quietmode = False
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showlinesmode = False
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prefix = None
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def debug(cls, message):
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"Show a debug message"
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if not Trace.debugmode or Trace.quietmode:
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return
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Trace.show(message, sys.stdout)
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def message(cls, message):
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"Show a trace message"
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if Trace.quietmode:
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return
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if Trace.prefix and Trace.showlinesmode:
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message = Trace.prefix + message
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Trace.show(message, sys.stdout)
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def error(cls, message):
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"Show an error message"
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message = '* ' + message
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if Trace.prefix and Trace.showlinesmode:
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message = Trace.prefix + message
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Trace.show(message, sys.stderr)
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def fatal(cls, message):
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"Show an error message and terminate"
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Trace.error('FATAL: ' + message)
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exit(-1)
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def show(cls, message, channel):
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"Show a message out of a channel"
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channel.write(message + '\n')
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debug = classmethod(debug)
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message = classmethod(message)
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error = classmethod(error)
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fatal = classmethod(fatal)
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show = classmethod(show)
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class ContainerConfig:
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"Configuration class from elyxer.config file"
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extracttext = {
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'allowed': ['FormulaConstant'],
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'extracted': ['AlphaCommand',
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'Bracket',
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'BracketCommand',
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'CombiningFunction',
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'EmptyCommand',
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'FontFunction',
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'Formula',
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'FormulaNumber',
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'FormulaSymbol',
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'OneParamFunction',
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'OversetFunction',
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'RawText',
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'SpacedCommand',
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'SymbolFunction',
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'TextFunction',
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'UndersetFunction',
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],
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}
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class EscapeConfig:
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"Configuration class from elyxer.config file"
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chars = {
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'\n': '',
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"'": '’',
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'`': '‘',
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}
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entities = {
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'&': '&',
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'<': '<',
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'>': '>',
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}
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class FormulaConfig:
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"Configuration class from elyxer.config file"
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alphacommands = {
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'\\AmS': '<span class="textsc">AmS</span>',
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'\\AA': 'Å',
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'\\AE': 'Æ',
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'\\DH': 'Ð',
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'\\L': 'Ł',
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'\\O': 'Ø',
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'\\OE': 'Œ',
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'\\TH': 'Þ',
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'\\aa': 'å',
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'\\ae': 'æ',
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'\\dh': 'ð',
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'\\i': 'ı',
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'\\j': 'ȷ',
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'\\l': 'ł',
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'\\o': 'ø',
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'\\oe': 'œ',
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'\\ss': 'ß',
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'\\th': 'þ',
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}
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for key, value in tex2unichar.mathalpha.items():
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alphacommands['\\'+key] = value
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array = {
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'begin': r'\begin',
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'cellseparator': '&',
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'end': r'\end',
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'rowseparator': r'\\',
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}
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bigbrackets = {'(': ['⎛', '⎜', '⎝'],
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')': ['⎞', '⎟', '⎠'],
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'[': ['⎡', '⎢', '⎣'],
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']': ['⎤', '⎥', '⎦'],
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'{': ['⎧', '⎪', '⎨', '⎩'],
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'}': ['⎫', '⎪', '⎬', '⎭'],
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# TODO: 2-row brackets with ⎰⎱ (\lmoustache \rmoustache)
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'|': ['|'], # 007C VERTICAL LINE
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# '|': ['⎮'], # 23AE INTEGRAL EXTENSION
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# '|': ['⎪'], # 23AA CURLY BRACKET EXTENSION
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'‖': ['‖'], # 2016 DOUBLE VERTICAL LINE
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# '∥': ['∥'], # 2225 PARALLEL TO
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}
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bracketcommands = {
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'\\left': 'span class="stretchy"',
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'\\left.': '<span class="leftdot"></span>',
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'\\middle': 'span class="stretchy"',
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'\\right': 'span class="stretchy"',
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'\\right.': '<span class="rightdot"></span>',
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}
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combiningfunctions = {
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"\\'": '\u0301', # x́
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'\\"': '\u0308', # ẍ
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'\\^': '\u0302', # x̂
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'\\`': '\u0300', # x̀
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'\\~': '\u0303', # x̃
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'\\c': '\u0327', # x̧
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'\\r': '\u030a', # x̊
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'\\s': '\u0329', # x̩
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'\\textcircled': '\u20dd', # x⃝
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'\\textsubring': '\u0325', # x̥
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'\\v': '\u030c', # x̌
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}
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for key, value in tex2unichar.mathaccent.items():
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combiningfunctions['\\'+key] = value
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commands = {
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'\\\\': '<br/>',
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'\\\n': ' ', # escaped whitespace
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'\\\t': ' ', # escaped whitespace
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'\\centerdot': '\u2B1D', # BLACK VERY SMALL SQUARE, mathbin
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'\\colon': ': ',
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'\\copyright': '©',
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'\\dotminus': '∸',
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'\\dots': '…',
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'\\dotsb': '⋯',
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'\\dotsc': '…',
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'\\dotsi': '⋯',
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'\\dotsm': '⋯',
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'\\dotso': '…',
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'\\euro': '€',
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'\\guillemotleft': '«',
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'\\guillemotright': '»',
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'\\hbar': '<i>\u0127</i>', # ħ LATIN SMALL LETTER H WITH STROKE
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'\\lVert': '‖',
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'\\Arrowvert': '\u2016', # ‖
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'\\lvert': '|',
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'\\newline': '<br/>',
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'\\nobreakspace': ' ',
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'\\nolimits': '',
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'\\nonumber': '',
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'\\qquad': ' ',
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'\\rVert': '‖',
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'\\rvert': '|',
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'\\textasciicircum': '^',
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'\\textasciitilde': '~',
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'\\textbackslash': '\\',
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'\\textcopyright': '©',
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'\\textdegree': '°',
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'\\textellipsis': '…',
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'\\textemdash': '—',
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'\\textendash': '—',
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'\\texteuro': '€',
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'\\textgreater': '>',
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'\\textless': '<',
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'\\textordfeminine': 'ª',
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'\\textordmasculine': 'º',
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'\\textquotedblleft': '“',
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'\\textquotedblright': '”',
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'\\textquoteright': '’',
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'\\textregistered': '®',
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'\\textrightarrow': '→',
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'\\textsection': '§',
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'\\texttrademark': '™',
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'\\texttwosuperior': '²',
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'\\textvisiblespace': ' ',
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'\\thickspace': '<span class="thickspace"> </span>', # 5/13 em
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'\\;': '<span class="thickspace"> </span>', # 5/13 em
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'\\triangle': '\u25B3', # WHITE UP-POINTING TRIANGLE, mathord
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'\\triangledown': '\u25BD', # WHITE DOWN-POINTING TRIANGLE, mathord
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'\\varnothing': '\u2300', # ⌀ DIAMETER SIGN
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# functions
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'\\Pr': 'Pr',
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'\\arccos': 'arccos',
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'\\arcsin': 'arcsin',
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'\\arctan': 'arctan',
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'\\arg': 'arg',
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'\\cos': 'cos',
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'\\cosh': 'cosh',
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'\\cot': 'cot',
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'\\coth': 'coth',
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'\\csc': 'csc',
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'\\deg': 'deg',
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'\\det': 'det',
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'\\dim': 'dim',
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'\\exp': 'exp',
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'\\gcd': 'gcd',
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'\\hom': 'hom',
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'\\injlim': 'inj lim',
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'\\ker': 'ker',
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'\\lg': 'lg',
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'\\liminf': 'lim inf',
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'\\limsup': 'lim sup',
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'\\ln': 'ln',
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'\\log': 'log',
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'\\projlim': 'proj lim',
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'\\sec': 'sec',
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'\\sin': 'sin',
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'\\sinh': 'sinh',
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'\\tan': 'tan',
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'\\tanh': 'tanh',
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}
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cmddict = {}
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cmddict.update(tex2unichar.mathbin) # TODO: spacing around binary operators
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cmddict.update(tex2unichar.mathopen)
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cmddict.update(tex2unichar.mathclose)
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cmddict.update(tex2unichar.mathfence)
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cmddict.update(tex2unichar.mathord)
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cmddict.update(tex2unichar.mathpunct)
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cmddict.update(tex2unichar.space)
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commands.update(('\\' + key, value) for key, value in cmddict.items())
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oversetfunctions = {
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# math accents (cf. combiningfunctions)
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# '\\acute': '´',
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'\\bar': '‒', # FIGURE DASH
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# '\\breve': '˘',
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# '\\check': 'ˇ',
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'\\dddot': '<span class="smallsymbol">⋯</span>',
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# '\\ddot': '··', # ¨ too high
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# '\\dot': '·',
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# '\\grave': '`',
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# '\\hat': '^',
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# '\\mathring': '˚',
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# '\\tilde': '~',
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'\\vec': '<span class="smallsymbol">→</span>',
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# embellishments
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'\\overleftarrow': '⟵',
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'\\overleftrightarrow': '⟷',
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'\\overrightarrow': '⟶',
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'\\widehat': '^',
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'\\widetilde': '～',
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}
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undersetfunctions = {
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'\\underleftarrow': '⟵',
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'\\underleftrightarrow': '⟷',
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'\\underrightarrow': '⟶',
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}
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endings = {
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'bracket': '}',
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'complex': '\\]',
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'endafter': '}',
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'endbefore': '\\end{',
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'squarebracket': ']',
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}
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environments = {
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'align': ['r', 'l'],
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'eqnarray': ['r', 'c', 'l'],
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'gathered': ['l', 'l'],
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'smallmatrix': ['c', 'c'],
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}
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fontfunctions = {
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'\\boldsymbol': 'b', '\\mathbb': 'span class="blackboard"',
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'\\mathbb{A}': '𝔸', '\\mathbb{B}': '𝔹', '\\mathbb{C}': 'ℂ',
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'\\mathbb{D}': '𝔻', '\\mathbb{E}': '𝔼', '\\mathbb{F}': '𝔽',
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'\\mathbb{G}': '𝔾', '\\mathbb{H}': 'ℍ', '\\mathbb{J}': '𝕁',
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'\\mathbb{K}': '𝕂', '\\mathbb{L}': '𝕃', '\\mathbb{N}': 'ℕ',
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'\\mathbb{O}': '𝕆', '\\mathbb{P}': 'ℙ', '\\mathbb{Q}': 'ℚ',
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'\\mathbb{R}': 'ℝ', '\\mathbb{S}': '𝕊', '\\mathbb{T}': '𝕋',
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'\\mathbb{W}': '𝕎', '\\mathbb{Z}': 'ℤ', '\\mathbf': 'b',
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'\\mathcal': 'span class="scriptfont"',
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'\\mathcal{B}': 'ℬ', '\\mathcal{E}': 'ℰ', '\\mathcal{F}':
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'ℱ', '\\mathcal{H}': 'ℋ', '\\mathcal{I}': 'ℐ',
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'\\mathcal{L}': 'ℒ', '\\mathcal{M}': 'ℳ', '\\mathcal{R}': 'ℛ',
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'\\mathfrak': 'span class="fraktur"',
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'\\mathfrak{C}': 'ℭ', '\\mathfrak{F}': '𝔉', '\\mathfrak{H}': 'ℌ',
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'\\mathfrak{I}': 'ℑ', '\\mathfrak{R}': 'ℜ', '\\mathfrak{Z}': 'ℨ',
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'\\mathit': 'i',
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'\\mathring{A}': 'Å', '\\mathring{U}': 'Ů',
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'\\mathring{a}': 'å', '\\mathring{u}': 'ů', '\\mathring{w}': 'ẘ',
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'\\mathring{y}': 'ẙ',
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'\\mathrm': 'span class="mathrm"',
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'\\mathscr': 'span class="mathscr"',
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'\\mathscr{B}': 'ℬ', '\\mathscr{E}': 'ℰ', '\\mathscr{F}': 'ℱ',
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'\\mathscr{H}': 'ℋ', '\\mathscr{I}': 'ℐ', '\\mathscr{L}': 'ℒ',
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'\\mathscr{M}': 'ℳ', '\\mathscr{R}': 'ℛ',
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'\\mathsf': 'span class="mathsf"',
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'\\mathtt': 'span class="mathtt"',
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'\\operatorname': 'span class="mathrm"',
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}
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hybridfunctions = {
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'\\addcontentsline': ['{$p!}{$q!}{$r!}', 'f0{}', 'ignored'],
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'\\addtocontents': ['{$p!}{$q!}', 'f0{}', 'ignored'],
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'\\backmatter': ['', 'f0{}', 'ignored'],
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'\\binom': ['{$1}{$2}', 'f2{(}f0{f1{$1}f1{$2}}f2{)}', 'span class="binom"', 'span class="binomstack"', 'span class="bigdelimiter size2"'],
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'\\boxed': ['{$1}', 'f0{$1}', 'span class="boxed"'],
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'\\cfrac': ['[$p!]{$1}{$2}', 'f0{f3{(}f1{$1}f3{)/(}f2{$2}f3{)}}', 'span class="fullfraction"', 'span class="numerator align-$p"', 'span class="denominator"', 'span class="ignored"'],
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'\\color': ['{$p!}{$1}', 'f0{$1}', 'span style="color: $p;"'],
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'\\colorbox': ['{$p!}{$1}', 'f0{$1}', 'span class="colorbox" style="background: $p;"'],
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'\\dbinom': ['{$1}{$2}', '(f0{f1{f2{$1}}f1{f2{ }}f1{f2{$2}}})', 'span class="binomial"', 'span class="binomrow"', 'span class="binomcell"'],
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'\\dfrac': ['{$1}{$2}', 'f0{f3{(}f1{$1}f3{)/(}f2{$2}f3{)}}', 'span class="fullfraction"', 'span class="numerator"', 'span class="denominator"', 'span class="ignored"'],
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'\\displaystyle': ['{$1}', 'f0{$1}', 'span class="displaystyle"'],
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'\\fancyfoot': ['[$p!]{$q!}', 'f0{}', 'ignored'],
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'\\fancyhead': ['[$p!]{$q!}', 'f0{}', 'ignored'],
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'\\fbox': ['{$1}', 'f0{$1}', 'span class="fbox"'],
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'\\fboxrule': ['{$p!}', 'f0{}', 'ignored'],
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'\\fboxsep': ['{$p!}', 'f0{}', 'ignored'],
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'\\fcolorbox': ['{$p!}{$q!}{$1}', 'f0{$1}', 'span class="boxed" style="border-color: $p; background: $q;"'],
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'\\frac': ['{$1}{$2}', 'f0{f3{(}f1{$1}f3{)/(}f2{$2}f3{)}}', 'span class="fraction"', 'span class="numerator"', 'span class="denominator"', 'span class="ignored"'],
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'\\framebox': ['[$p!][$q!]{$1}', 'f0{$1}', 'span class="framebox align-$q" style="width: $p;"'],
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'\\frontmatter': ['', 'f0{}', 'ignored'],
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'\\href': ['[$o]{$u!}{$t!}', 'f0{$t}', 'a href="$u"'],
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'\\hspace': ['{$p!}', 'f0{ }', 'span class="hspace" style="width: $p;"'],
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'\\leftroot': ['{$p!}', 'f0{ }', 'span class="leftroot" style="width: $p;px"'],
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# TODO: convert 1 mu to 1/18 em
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# '\\mspace': ['{$p!}', 'f0{ }', 'span class="hspace" style="width: $p;"'],
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'\\nicefrac': ['{$1}{$2}', 'f0{f1{$1}⁄f2{$2}}', 'span class="fraction"', 'sup class="numerator"', 'sub class="denominator"', 'span class="ignored"'],
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'\\parbox': ['[$p!]{$w!}{$1}', 'f0{1}', 'div class="Boxed" style="width: $w;"'],
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'\\raisebox': ['{$p!}{$1}', 'f0{$1.font}', 'span class="raisebox" style="vertical-align: $p;"'],
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'\\renewenvironment': ['{$1!}{$2!}{$3!}', ''],
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'\\rule': ['[$v!]{$w!}{$h!}', 'f0/', 'hr class="line" style="width: $w; height: $h;"'],
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'\\scriptscriptstyle': ['{$1}', 'f0{$1}', 'span class="scriptscriptstyle"'],
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'\\scriptstyle': ['{$1}', 'f0{$1}', 'span class="scriptstyle"'],
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# TODO: increase √-size with argument (\frac in display mode, ...)
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'\\sqrt': ['[$0]{$1}', 'f0{f1{$0}f2{√}f4{(}f3{$1}f4{)}}', 'span class="sqrt"', 'sup class="root"', 'span class="radical"', 'span class="root"', 'span class="ignored"'],
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'\\stackrel': ['{$1}{$2}', 'f0{f1{$1}f2{$2}}', 'span class="stackrel"', 'span class="upstackrel"', 'span class="downstackrel"'],
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'\\tbinom': ['{$1}{$2}', '(f0{f1{f2{$1}}f1{f2{ }}f1{f2{$2}}})', 'span class="binomial"', 'span class="binomrow"', 'span class="binomcell"'],
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'\\tfrac': ['{$1}{$2}', 'f0{f3{(}f1{$1}f3{)/(}f2{$2}f3{)}}', 'span class="textfraction"', 'span class="numerator"', 'span class="denominator"', 'span class="ignored"'],
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'\\textcolor': ['{$p!}{$1}', 'f0{$1}', 'span style="color: $p;"'],
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'\\textstyle': ['{$1}', 'f0{$1}', 'span class="textstyle"'],
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||
'\\thispagestyle': ['{$p!}', 'f0{}', 'ignored'],
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||
'\\unit': ['[$0]{$1}', '$0f0{$1.font}', 'span class="unit"'],
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'\\unitfrac': ['[$0]{$1}{$2}', '$0f0{f1{$1.font}⁄f2{$2.font}}', 'span class="fraction"', 'sup class="unit"', 'sub class="unit"'],
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||
'\\uproot': ['{$p!}', 'f0{ }', 'span class="uproot" style="width: $p;px"'],
|
||
'\\url': ['{$u!}', 'f0{$u}', 'a href="$u"'],
|
||
'\\vspace': ['{$p!}', 'f0{ }', 'span class="vspace" style="height: $p;"'],
|
||
}
|
||
|
||
hybridsizes = {
|
||
'\\binom': '$1+$2', '\\cfrac': '$1+$2', '\\dbinom': '$1+$2+1',
|
||
'\\dfrac': '$1+$2', '\\frac': '$1+$2', '\\tbinom': '$1+$2+1',
|
||
}
|
||
|
||
labelfunctions = {
|
||
'\\label': 'a name="#"',
|
||
}
|
||
|
||
limitcommands = {
|
||
'\\biginterleave': '⫼',
|
||
'\\inf': 'inf',
|
||
'\\lim': 'lim',
|
||
'\\max': 'max',
|
||
'\\min': 'min',
|
||
'\\sup': 'sup',
|
||
'\\ointop': '<span class="bigoperator integral">∮</span>',
|
||
'\\bigcap': '<span class="bigoperator">⋂</span>',
|
||
'\\bigcup': '<span class="bigoperator">⋃</span>',
|
||
'\\bigodot': '<span class="bigoperator">⨀</span>',
|
||
'\\bigoplus': '<span class="bigoperator">⨁</span>',
|
||
'\\bigotimes': '<span class="bigoperator">⨂</span>',
|
||
'\\bigsqcap': '<span class="bigoperator">⨅</span>',
|
||
'\\bigsqcup': '<span class="bigoperator">⨆</span>',
|
||
'\\biguplus': '<span class="bigoperator">⨄</span>',
|
||
'\\bigvee': '<span class="bigoperator">⋁</span>',
|
||
'\\bigwedge': '<span class="bigoperator">⋀</span>',
|
||
'\\coprod': '<span class="bigoperator">∐</span>',
|
||
'\\intop': '<span class="bigoperator integral">∫</span>',
|
||
'\\prod': '<span class="bigoperator">∏</span>',
|
||
'\\sum': '<span class="bigoperator">∑</span>',
|
||
'\\varprod': '<span class="bigoperator">⨉</span>',
|
||
'\\zcmp': '⨟', '\\zhide': '⧹', '\\zpipe': '⨠', '\\zproject': '⨡',
|
||
# integrals have limits in index position with LaTeX default settings
|
||
# TODO: move to commands?
|
||
'\\int': '<span class="bigoperator integral">∫</span>',
|
||
'\\iint': '<span class="bigoperator integral">∬</span>',
|
||
'\\iiint': '<span class="bigoperator integral">∭</span>',
|
||
'\\iiiint': '<span class="bigoperator integral">⨌</span>',
|
||
'\\fint': '<span class="bigoperator integral">⨏</span>',
|
||
'\\idotsint': '<span class="bigoperator integral">∫⋯∫</span>',
|
||
'\\oint': '<span class="bigoperator integral">∮</span>',
|
||
'\\oiint': '<span class="bigoperator integral">∯</span>',
|
||
'\\oiiint': '<span class="bigoperator integral">∰</span>',
|
||
'\\ointclockwise': '<span class="bigoperator integral">∲</span>',
|
||
'\\ointctrclockwise': '<span class="bigoperator integral">∳</span>',
|
||
'\\smallint': '<span class="smallsymbol integral">∫</span>',
|
||
'\\sqint': '<span class="bigoperator integral">⨖</span>',
|
||
'\\varointclockwise': '<span class="bigoperator integral">∲</span>',
|
||
}
|
||
|
||
modified = {
|
||
'\n': '', ' ': '', '$': '', '&': ' ', '\'': '’', '+': '\u2009+\u2009',
|
||
',': ',\u2009', '-': '\u2009−\u2009', '/': '\u2009⁄\u2009', ':': ' : ', '<': '\u2009<\u2009',
|
||
'=': '\u2009=\u2009', '>': '\u2009>\u2009', '@': '', '~': '\u00a0',
|
||
}
|
||
|
||
onefunctions = {
|
||
'\\big': 'span class="bigdelimiter size1"',
|
||
'\\bigl': 'span class="bigdelimiter size1"',
|
||
'\\bigr': 'span class="bigdelimiter size1"',
|
||
'\\Big': 'span class="bigdelimiter size2"',
|
||
'\\Bigl': 'span class="bigdelimiter size2"',
|
||
'\\Bigr': 'span class="bigdelimiter size2"',
|
||
'\\bigg': 'span class="bigdelimiter size3"',
|
||
'\\biggl': 'span class="bigdelimiter size3"',
|
||
'\\biggr': 'span class="bigdelimiter size3"',
|
||
'\\Bigg': 'span class="bigdelimiter size4"',
|
||
'\\Biggl': 'span class="bigdelimiter size4"',
|
||
'\\Biggr': 'span class="bigdelimiter size4"',
|
||
# '\\bar': 'span class="bar"',
|
||
'\\begin{array}': 'span class="arraydef"',
|
||
'\\centering': 'span class="align-center"',
|
||
'\\ensuremath': 'span class="ensuremath"',
|
||
'\\hphantom': 'span class="phantom"',
|
||
'\\noindent': 'span class="noindent"',
|
||
'\\overbrace': 'span class="overbrace"',
|
||
'\\overline': 'span class="overline"',
|
||
'\\phantom': 'span class="phantom"',
|
||
'\\underbrace': 'span class="underbrace"',
|
||
'\\underline': '',
|
||
'\\vphantom': 'span class="phantom"',
|
||
}
|
||
|
||
# relations (put additional space before and after the symbol)
|
||
spacedcommands = {
|
||
# negated symbols without pre-composed Unicode character
|
||
'\\nleqq': '\u2266\u0338', # ≦̸
|
||
'\\ngeqq': '\u2267\u0338', # ≧̸
|
||
'\\nleqslant': '\u2a7d\u0338', # ⩽̸
|
||
'\\ngeqslant': '\u2a7e\u0338', # ⩾̸
|
||
'\\nsubseteqq': '\u2AC5\u0338', # ⫅̸
|
||
'\\nsupseteqq': '\u2AC6\u0338', # ⫆̸
|
||
'\\nsqsubset': '\u2276\u228F', # ⊏̸
|
||
# modified glyphs
|
||
'\\shortmid': '<span class="smallsymbol">∣</span>',
|
||
'\\shortparallel': '<span class="smallsymbol">∥</span>',
|
||
'\\nshortmid': '<span class="smallsymbol">∤</span>',
|
||
'\\nshortparallel': '<span class="smallsymbol">∦</span>',
|
||
'\\smallfrown': '<span class="smallsymbol">⌢</span>',
|
||
'\\smallsmile': '<span class="smallsymbol">⌣</span>',
|
||
'\\thickapprox': '<span class="boldsymbol">≈</span>',
|
||
'\\thicksim': '<span class="boldsymbol">∼</span>',
|
||
'\\varpropto': '<span class="mathsf">\u221d</span>', # ∝ PROPORTIONAL TO
|
||
}
|
||
for key, value in tex2unichar.mathrel.items():
|
||
spacedcommands['\\'+key] = value
|
||
starts = {
|
||
'beginafter': '}', 'beginbefore': '\\begin{', 'bracket': '{',
|
||
'command': '\\', 'comment': '%', 'complex': '\\[', 'simple': '$',
|
||
'squarebracket': '[', 'unnumbered': '*',
|
||
}
|
||
|
||
symbolfunctions = {
|
||
'^': 'sup', '_': 'sub',
|
||
}
|
||
|
||
textfunctions = {
|
||
'\\mbox': 'span class="mbox"',
|
||
'\\text': 'span class="text"',
|
||
'\\textbf': 'span class="textbf"',
|
||
'\\textit': 'span class="textit"',
|
||
'\\textnormal': 'span class="textnormal"',
|
||
'\\textrm': 'span class="textrm"',
|
||
'\\textsc': 'span class="textsc"',
|
||
'\\textsf': 'span class="textsf"',
|
||
'\\textsl': 'span class="textsl"',
|
||
'\\texttt': 'span class="texttt"',
|
||
'\\textup': 'span class="normal"',
|
||
}
|
||
|
||
unmodified = {
|
||
'characters': ['.', '*', '€', '(', ')', '[', ']',
|
||
'·', '!', ';', '|', '§', '"', '?'],
|
||
}
|
||
|
||
|
||
class CommandLineParser:
|
||
"A parser for runtime options"
|
||
|
||
def __init__(self, options):
|
||
self.options = options
|
||
|
||
def parseoptions(self, args):
|
||
"Parse command line options"
|
||
if len(args) == 0:
|
||
return None
|
||
while len(args) > 0 and args[0].startswith('--'):
|
||
key, value = self.readoption(args)
|
||
if not key:
|
||
return 'Option ' + value + ' not recognized'
|
||
if not value:
|
||
return 'Option ' + key + ' needs a value'
|
||
setattr(self.options, key, value)
|
||
return None
|
||
|
||
def readoption(self, args):
|
||
"Read the key and value for an option"
|
||
arg = args[0][2:]
|
||
del args[0]
|
||
if '=' in arg:
|
||
key = self.readequalskey(arg, args)
|
||
else:
|
||
key = arg.replace('-', '')
|
||
if not hasattr(self.options, key):
|
||
return None, key
|
||
current = getattr(self.options, key)
|
||
if isinstance(current, bool):
|
||
return key, True
|
||
# read value
|
||
if len(args) == 0:
|
||
return key, None
|
||
if args[0].startswith('"'):
|
||
initial = args[0]
|
||
del args[0]
|
||
return key, self.readquoted(args, initial)
|
||
value = args[0].decode('utf-8')
|
||
del args[0]
|
||
if isinstance(current, list):
|
||
current.append(value)
|
||
return key, current
|
||
return key, value
|
||
|
||
def readquoted(self, args, initial):
|
||
"Read a value between quotes"
|
||
Trace.error('Oops')
|
||
value = initial[1:]
|
||
while len(args) > 0 and not args[0].endswith('"') and not args[0].startswith('--'):
|
||
Trace.error('Appending ' + args[0])
|
||
value += ' ' + args[0]
|
||
del args[0]
|
||
if len(args) == 0 or args[0].startswith('--'):
|
||
return None
|
||
value += ' ' + args[0:-1]
|
||
return value
|
||
|
||
def readequalskey(self, arg, args):
|
||
"Read a key using equals"
|
||
split = arg.split('=', 1)
|
||
key = split[0]
|
||
value = split[1]
|
||
args.insert(0, value)
|
||
return key
|
||
|
||
|
||
class Options:
|
||
"A set of runtime options"
|
||
|
||
location = None
|
||
|
||
debug = False
|
||
quiet = False
|
||
version = False
|
||
help = False
|
||
simplemath = False
|
||
showlines = True
|
||
|
||
branches = {}
|
||
|
||
def parseoptions(self, args):
|
||
"Parse command line options"
|
||
Options.location = args[0]
|
||
del args[0]
|
||
parser = CommandLineParser(Options)
|
||
result = parser.parseoptions(args)
|
||
if result:
|
||
Trace.error(result)
|
||
self.usage()
|
||
self.processoptions()
|
||
|
||
def processoptions(self):
|
||
"Process all options parsed."
|
||
if Options.help:
|
||
self.usage()
|
||
if Options.version:
|
||
self.showversion()
|
||
# set in Trace if necessary
|
||
for param in dir(Trace):
|
||
if param.endswith('mode'):
|
||
setattr(Trace, param, getattr(self, param[:-4]))
|
||
|
||
def usage(self):
|
||
"Show correct usage"
|
||
Trace.error('Usage: ' + os.path.basename(Options.location)
|
||
+ ' [options] "input string"')
|
||
Trace.error('Convert input string with LaTeX math to MathML')
|
||
self.showoptions()
|
||
|
||
def showoptions(self):
|
||
"Show all possible options"
|
||
Trace.error(' --help: show this online help')
|
||
Trace.error(' --quiet: disables all runtime messages')
|
||
Trace.error(' --debug: enable debugging messages (for developers)')
|
||
Trace.error(' --version: show version number and release date')
|
||
Trace.error(' --simplemath: do not generate fancy math constructions')
|
||
sys.exit()
|
||
|
||
def showversion(self):
|
||
"Return the current eLyXer version string"
|
||
Trace.error('math2html '+__version__)
|
||
sys.exit()
|
||
|
||
|
||
class Cloner:
|
||
"An object used to clone other objects."
|
||
|
||
def clone(cls, original):
|
||
"Return an exact copy of an object."
|
||
"The original object must have an empty constructor."
|
||
return cls.create(original.__class__)
|
||
|
||
def create(cls, type):
|
||
"Create an object of a given class."
|
||
clone = type.__new__(type)
|
||
clone.__init__()
|
||
return clone
|
||
|
||
clone = classmethod(clone)
|
||
create = classmethod(create)
|
||
|
||
|
||
class ContainerExtractor:
|
||
"""A class to extract certain containers.
|
||
|
||
The config parameter is a map containing three lists:
|
||
allowed, copied and extracted.
|
||
Each of the three is a list of class names for containers.
|
||
Allowed containers are included as is into the result.
|
||
Cloned containers are cloned and placed into the result.
|
||
Extracted containers are looked into.
|
||
All other containers are silently ignored.
|
||
"""
|
||
|
||
def __init__(self, config):
|
||
self.allowed = config['allowed']
|
||
self.extracted = config['extracted']
|
||
|
||
def extract(self, container):
|
||
"Extract a group of selected containers from a container."
|
||
list = []
|
||
locate = lambda c: c.__class__.__name__ in self.allowed
|
||
recursive = lambda c: c.__class__.__name__ in self.extracted
|
||
process = lambda c: self.process(c, list)
|
||
container.recursivesearch(locate, recursive, process)
|
||
return list
|
||
|
||
def process(self, container, list):
|
||
"Add allowed containers."
|
||
name = container.__class__.__name__
|
||
if name in self.allowed:
|
||
list.append(container)
|
||
else:
|
||
Trace.error('Unknown container class ' + name)
|
||
|
||
def safeclone(self, container):
|
||
"Return a new container with contents only in a safe list, recursively."
|
||
clone = Cloner.clone(container)
|
||
clone.output = container.output
|
||
clone.contents = self.extract(container)
|
||
return clone
|
||
|
||
|
||
class Parser:
|
||
"A generic parser"
|
||
|
||
def __init__(self):
|
||
self.begin = 0
|
||
self.parameters = {}
|
||
|
||
def parseheader(self, reader):
|
||
"Parse the header"
|
||
header = reader.currentline().split()
|
||
reader.nextline()
|
||
self.begin = reader.linenumber
|
||
return header
|
||
|
||
def parseparameter(self, reader):
|
||
"Parse a parameter"
|
||
split = reader.currentline().strip().split(' ', 1)
|
||
reader.nextline()
|
||
if len(split) == 0:
|
||
return
|
||
key = split[0]
|
||
if len(split) == 1:
|
||
self.parameters[key] = True
|
||
return
|
||
if '"' not in split[1]:
|
||
self.parameters[key] = split[1].strip()
|
||
return
|
||
doublesplit = split[1].split('"')
|
||
self.parameters[key] = doublesplit[1]
|
||
|
||
def parseending(self, reader, process):
|
||
"Parse until the current ending is found"
|
||
if not self.ending:
|
||
Trace.error('No ending for ' + str(self))
|
||
return
|
||
while not reader.currentline().startswith(self.ending):
|
||
process()
|
||
|
||
def parsecontainer(self, reader, contents):
|
||
container = self.factory.createcontainer(reader)
|
||
if container:
|
||
container.parent = self.parent
|
||
contents.append(container)
|
||
|
||
def __str__(self):
|
||
"Return a description"
|
||
return self.__class__.__name__ + ' (' + str(self.begin) + ')'
|
||
|
||
|
||
class LoneCommand(Parser):
|
||
"A parser for just one command line"
|
||
|
||
def parse(self, reader):
|
||
"Read nothing"
|
||
return []
|
||
|
||
|
||
class TextParser(Parser):
|
||
"A parser for a command and a bit of text"
|
||
|
||
stack = []
|
||
|
||
def __init__(self, container):
|
||
Parser.__init__(self)
|
||
self.ending = None
|
||
if container.__class__.__name__ in ContainerConfig.endings:
|
||
self.ending = ContainerConfig.endings[container.__class__.__name__]
|
||
self.endings = []
|
||
|
||
def parse(self, reader):
|
||
"Parse lines as long as they are text"
|
||
TextParser.stack.append(self.ending)
|
||
self.endings = TextParser.stack + [ContainerConfig.endings['Layout'],
|
||
ContainerConfig.endings['Inset'],
|
||
self.ending]
|
||
contents = []
|
||
while not self.isending(reader):
|
||
self.parsecontainer(reader, contents)
|
||
return contents
|
||
|
||
def isending(self, reader):
|
||
"Check if text is ending"
|
||
current = reader.currentline().split()
|
||
if len(current) == 0:
|
||
return False
|
||
if current[0] in self.endings:
|
||
if current[0] in TextParser.stack:
|
||
TextParser.stack.remove(current[0])
|
||
else:
|
||
TextParser.stack = []
|
||
return True
|
||
return False
|
||
|
||
|
||
class ExcludingParser(Parser):
|
||
"A parser that excludes the final line"
|
||
|
||
def parse(self, reader):
|
||
"Parse everything up to (and excluding) the final line"
|
||
contents = []
|
||
self.parseending(reader, lambda: self.parsecontainer(reader, contents))
|
||
return contents
|
||
|
||
|
||
class BoundedParser(ExcludingParser):
|
||
"A parser bound by a final line"
|
||
|
||
def parse(self, reader):
|
||
"Parse everything, including the final line"
|
||
contents = ExcludingParser.parse(self, reader)
|
||
# skip last line
|
||
reader.nextline()
|
||
return contents
|
||
|
||
|
||
class BoundedDummy(Parser):
|
||
"A bound parser that ignores everything"
|
||
|
||
def parse(self, reader):
|
||
"Parse the contents of the container"
|
||
self.parseending(reader, lambda: reader.nextline())
|
||
# skip last line
|
||
reader.nextline()
|
||
return []
|
||
|
||
|
||
class StringParser(Parser):
|
||
"Parses just a string"
|
||
|
||
def parseheader(self, reader):
|
||
"Do nothing, just take note"
|
||
self.begin = reader.linenumber + 1
|
||
return []
|
||
|
||
def parse(self, reader):
|
||
"Parse a single line"
|
||
contents = reader.currentline()
|
||
reader.nextline()
|
||
return contents
|
||
|
||
|
||
class ContainerOutput:
|
||
"The generic HTML output for a container."
|
||
|
||
def gethtml(self, container):
|
||
"Show an error."
|
||
Trace.error('gethtml() not implemented for ' + str(self))
|
||
|
||
def isempty(self):
|
||
"Decide if the output is empty: by default, not empty."
|
||
return False
|
||
|
||
|
||
class EmptyOutput(ContainerOutput):
|
||
|
||
def gethtml(self, container):
|
||
"Return empty HTML code."
|
||
return []
|
||
|
||
def isempty(self):
|
||
"This output is particularly empty."
|
||
return True
|
||
|
||
|
||
class FixedOutput(ContainerOutput):
|
||
"Fixed output"
|
||
|
||
def gethtml(self, container):
|
||
"Return constant HTML code"
|
||
return container.html
|
||
|
||
|
||
class ContentsOutput(ContainerOutput):
|
||
"Outputs the contents converted to HTML"
|
||
|
||
def gethtml(self, container):
|
||
"Return the HTML code"
|
||
html = []
|
||
if container.contents is None:
|
||
return html
|
||
for element in container.contents:
|
||
if not hasattr(element, 'gethtml'):
|
||
Trace.error('No html in ' + element.__class__.__name__ + ': ' + str(element))
|
||
return html
|
||
html += element.gethtml()
|
||
return html
|
||
|
||
|
||
class TaggedOutput(ContentsOutput):
|
||
"Outputs an HTML tag surrounding the contents."
|
||
|
||
tag = None
|
||
breaklines = False
|
||
empty = False
|
||
|
||
def settag(self, tag, breaklines=False, empty=False):
|
||
"Set the value for the tag and other attributes."
|
||
self.tag = tag
|
||
if breaklines:
|
||
self.breaklines = breaklines
|
||
if empty:
|
||
self.empty = empty
|
||
return self
|
||
|
||
def setbreaklines(self, breaklines):
|
||
"Set the value for breaklines."
|
||
self.breaklines = breaklines
|
||
return self
|
||
|
||
def gethtml(self, container):
|
||
"Return the HTML code."
|
||
if self.empty:
|
||
return [self.selfclosing(container)]
|
||
html = [self.open(container)]
|
||
html += ContentsOutput.gethtml(self, container)
|
||
html.append(self.close(container))
|
||
return html
|
||
|
||
def open(self, container):
|
||
"Get opening line."
|
||
if not self.checktag(container):
|
||
return ''
|
||
open = '<' + self.tag + '>'
|
||
if self.breaklines:
|
||
return open + '\n'
|
||
return open
|
||
|
||
def close(self, container):
|
||
"Get closing line."
|
||
if not self.checktag(container):
|
||
return ''
|
||
close = '</' + self.tag.split()[0] + '>'
|
||
if self.breaklines:
|
||
return '\n' + close + '\n'
|
||
return close
|
||
|
||
def selfclosing(self, container):
|
||
"Get self-closing line."
|
||
if not self.checktag(container):
|
||
return ''
|
||
selfclosing = '<' + self.tag + '/>'
|
||
if self.breaklines:
|
||
return selfclosing + '\n'
|
||
return selfclosing
|
||
|
||
def checktag(self, container):
|
||
"Check that the tag is valid."
|
||
if not self.tag:
|
||
Trace.error('No tag in ' + str(container))
|
||
return False
|
||
if self.tag == '':
|
||
return False
|
||
return True
|
||
|
||
|
||
class FilteredOutput(ContentsOutput):
|
||
"Returns the output in the contents, but filtered:"
|
||
"some strings are replaced by others."
|
||
|
||
def __init__(self):
|
||
"Initialize the filters."
|
||
self.filters = []
|
||
|
||
def addfilter(self, original, replacement):
|
||
"Add a new filter: replace the original by the replacement."
|
||
self.filters.append((original, replacement))
|
||
|
||
def gethtml(self, container):
|
||
"Return the HTML code"
|
||
result = []
|
||
html = ContentsOutput.gethtml(self, container)
|
||
for line in html:
|
||
result.append(self.filter(line))
|
||
return result
|
||
|
||
def filter(self, line):
|
||
"Filter a single line with all available filters."
|
||
for original, replacement in self.filters:
|
||
if original in line:
|
||
line = line.replace(original, replacement)
|
||
return line
|
||
|
||
|
||
class StringOutput(ContainerOutput):
|
||
"Returns a bare string as output"
|
||
|
||
def gethtml(self, container):
|
||
"Return a bare string"
|
||
return [container.string]
|
||
|
||
|
||
class Globable:
|
||
"""A bit of text which can be globbed (lumped together in bits).
|
||
Methods current(), skipcurrent(), checkfor() and isout() have to be
|
||
implemented by subclasses."""
|
||
|
||
leavepending = False
|
||
|
||
def __init__(self):
|
||
self.endinglist = EndingList()
|
||
|
||
def checkbytemark(self):
|
||
"Check for a Unicode byte mark and skip it."
|
||
if self.finished():
|
||
return
|
||
if ord(self.current()) == 0xfeff:
|
||
self.skipcurrent()
|
||
|
||
def isout(self):
|
||
"Find out if we are out of the position yet."
|
||
Trace.error('Unimplemented isout()')
|
||
return True
|
||
|
||
def current(self):
|
||
"Return the current character."
|
||
Trace.error('Unimplemented current()')
|
||
return ''
|
||
|
||
def checkfor(self, string):
|
||
"Check for the given string in the current position."
|
||
Trace.error('Unimplemented checkfor()')
|
||
return False
|
||
|
||
def finished(self):
|
||
"Find out if the current text has finished."
|
||
if self.isout():
|
||
if not self.leavepending:
|
||
self.endinglist.checkpending()
|
||
return True
|
||
return self.endinglist.checkin(self)
|
||
|
||
def skipcurrent(self):
|
||
"Return the current character and skip it."
|
||
Trace.error('Unimplemented skipcurrent()')
|
||
return ''
|
||
|
||
def glob(self, currentcheck):
|
||
"Glob a bit of text that satisfies a check on the current char."
|
||
glob = ''
|
||
while not self.finished() and currentcheck():
|
||
glob += self.skipcurrent()
|
||
return glob
|
||
|
||
def globalpha(self):
|
||
"Glob a bit of alpha text"
|
||
return self.glob(lambda: self.current().isalpha())
|
||
|
||
def globnumber(self):
|
||
"Glob a row of digits."
|
||
return self.glob(lambda: self.current().isdigit())
|
||
|
||
def isidentifier(self):
|
||
"Return if the current character is alphanumeric or _."
|
||
if self.current().isalnum() or self.current() == '_':
|
||
return True
|
||
return False
|
||
|
||
def globidentifier(self):
|
||
"Glob alphanumeric and _ symbols."
|
||
return self.glob(self.isidentifier)
|
||
|
||
def isvalue(self):
|
||
"Return if the current character is a value character:"
|
||
"not a bracket or a space."
|
||
if self.current().isspace():
|
||
return False
|
||
if self.current() in '{}()':
|
||
return False
|
||
return True
|
||
|
||
def globvalue(self):
|
||
"Glob a value: any symbols but brackets."
|
||
return self.glob(self.isvalue)
|
||
|
||
def skipspace(self):
|
||
"Skip all whitespace at current position."
|
||
return self.glob(lambda: self.current().isspace())
|
||
|
||
def globincluding(self, magicchar):
|
||
"Glob a bit of text up to (including) the magic char."
|
||
glob = self.glob(lambda: self.current() != magicchar) + magicchar
|
||
self.skip(magicchar)
|
||
return glob
|
||
|
||
def globexcluding(self, excluded):
|
||
"Glob a bit of text up until (excluding) any excluded character."
|
||
return self.glob(lambda: self.current() not in excluded)
|
||
|
||
def pushending(self, ending, optional=False):
|
||
"Push a new ending to the bottom"
|
||
self.endinglist.add(ending, optional)
|
||
|
||
def popending(self, expected=None):
|
||
"Pop the ending found at the current position"
|
||
if self.isout() and self.leavepending:
|
||
return expected
|
||
ending = self.endinglist.pop(self)
|
||
if expected and expected != ending:
|
||
Trace.error('Expected ending ' + expected + ', got ' + ending)
|
||
self.skip(ending)
|
||
return ending
|
||
|
||
def nextending(self):
|
||
"Return the next ending in the queue."
|
||
nextending = self.endinglist.findending(self)
|
||
if not nextending:
|
||
return None
|
||
return nextending.ending
|
||
|
||
|
||
class EndingList:
|
||
"A list of position endings"
|
||
|
||
def __init__(self):
|
||
self.endings = []
|
||
|
||
def add(self, ending, optional=False):
|
||
"Add a new ending to the list"
|
||
self.endings.append(PositionEnding(ending, optional))
|
||
|
||
def pickpending(self, pos):
|
||
"Pick any pending endings from a parse position."
|
||
self.endings += pos.endinglist.endings
|
||
|
||
def checkin(self, pos):
|
||
"Search for an ending"
|
||
if self.findending(pos):
|
||
return True
|
||
return False
|
||
|
||
def pop(self, pos):
|
||
"Remove the ending at the current position"
|
||
if pos.isout():
|
||
Trace.error('No ending out of bounds')
|
||
return ''
|
||
ending = self.findending(pos)
|
||
if not ending:
|
||
Trace.error('No ending at ' + pos.current())
|
||
return ''
|
||
for each in reversed(self.endings):
|
||
self.endings.remove(each)
|
||
if each == ending:
|
||
return each.ending
|
||
elif not each.optional:
|
||
Trace.error('Removed non-optional ending ' + each)
|
||
Trace.error('No endings left')
|
||
return ''
|
||
|
||
def findending(self, pos):
|
||
"Find the ending at the current position"
|
||
if len(self.endings) == 0:
|
||
return None
|
||
for index, ending in enumerate(reversed(self.endings)):
|
||
if ending.checkin(pos):
|
||
return ending
|
||
if not ending.optional:
|
||
return None
|
||
return None
|
||
|
||
def checkpending(self):
|
||
"Check if there are any pending endings"
|
||
if len(self.endings) != 0:
|
||
Trace.error('Pending ' + str(self) + ' left open')
|
||
|
||
def __str__(self):
|
||
"Printable representation"
|
||
string = 'endings ['
|
||
for ending in self.endings:
|
||
string += str(ending) + ','
|
||
if len(self.endings) > 0:
|
||
string = string[:-1]
|
||
return string + ']'
|
||
|
||
|
||
class PositionEnding:
|
||
"An ending for a parsing position"
|
||
|
||
def __init__(self, ending, optional):
|
||
self.ending = ending
|
||
self.optional = optional
|
||
|
||
def checkin(self, pos):
|
||
"Check for the ending"
|
||
return pos.checkfor(self.ending)
|
||
|
||
def __str__(self):
|
||
"Printable representation"
|
||
string = 'Ending ' + self.ending
|
||
if self.optional:
|
||
string += ' (optional)'
|
||
return string
|
||
|
||
|
||
class Position(Globable):
|
||
"""A position in a text to parse.
|
||
Including those in Globable, functions to implement by subclasses are:
|
||
skip(), identifier(), extract(), isout() and current()."""
|
||
|
||
def __init__(self):
|
||
Globable.__init__(self)
|
||
|
||
def skip(self, string):
|
||
"Skip a string"
|
||
Trace.error('Unimplemented skip()')
|
||
|
||
def identifier(self):
|
||
"Return an identifier for the current position."
|
||
Trace.error('Unimplemented identifier()')
|
||
return 'Error'
|
||
|
||
def extract(self, length):
|
||
"Extract the next string of the given length, or None if not enough text,"
|
||
"without advancing the parse position."
|
||
Trace.error('Unimplemented extract()')
|
||
return None
|
||
|
||
def checkfor(self, string):
|
||
"Check for a string at the given position."
|
||
return string == self.extract(len(string))
|
||
|
||
def checkforlower(self, string):
|
||
"Check for a string in lower case."
|
||
extracted = self.extract(len(string))
|
||
if not extracted:
|
||
return False
|
||
return string.lower() == self.extract(len(string)).lower()
|
||
|
||
def skipcurrent(self):
|
||
"Return the current character and skip it."
|
||
current = self.current()
|
||
self.skip(current)
|
||
return current
|
||
|
||
def __next__(self):
|
||
"Advance the position and return the next character."
|
||
self.skipcurrent()
|
||
return self.current()
|
||
|
||
def checkskip(self, string):
|
||
"Check for a string at the given position; if there, skip it"
|
||
if not self.checkfor(string):
|
||
return False
|
||
self.skip(string)
|
||
return True
|
||
|
||
def error(self, message):
|
||
"Show an error message and the position identifier."
|
||
Trace.error(message + ': ' + self.identifier())
|
||
|
||
|
||
class TextPosition(Position):
|
||
"A parse position based on a raw text."
|
||
|
||
def __init__(self, text):
|
||
"Create the position from some text."
|
||
Position.__init__(self)
|
||
self.pos = 0
|
||
self.text = text
|
||
self.checkbytemark()
|
||
|
||
def skip(self, string):
|
||
"Skip a string of characters."
|
||
self.pos += len(string)
|
||
|
||
def identifier(self):
|
||
"Return a sample of the remaining text."
|
||
length = 30
|
||
if self.pos + length > len(self.text):
|
||
length = len(self.text) - self.pos
|
||
return '*' + self.text[self.pos:self.pos + length] + '*'
|
||
|
||
def isout(self):
|
||
"Find out if we are out of the text yet."
|
||
return self.pos >= len(self.text)
|
||
|
||
def current(self):
|
||
"Return the current character, assuming we are not out."
|
||
return self.text[self.pos]
|
||
|
||
def extract(self, length):
|
||
"Extract the next string of the given length, or None if not enough text."
|
||
if self.pos + length > len(self.text):
|
||
return None
|
||
return self.text[self.pos : self.pos + length] # noqa: E203
|
||
|
||
|
||
class Container:
|
||
"A container for text and objects in a lyx file"
|
||
|
||
partkey = None
|
||
parent = None
|
||
begin = None
|
||
|
||
def __init__(self):
|
||
self.contents = list()
|
||
|
||
def process(self):
|
||
"Process contents"
|
||
pass
|
||
|
||
def gethtml(self):
|
||
"Get the resulting HTML"
|
||
html = self.output.gethtml(self)
|
||
if isinstance(html, str):
|
||
Trace.error('Raw string ' + html)
|
||
html = [html]
|
||
return html
|
||
|
||
def escape(self, line, replacements=EscapeConfig.entities):
|
||
"Escape a line with replacements from a map"
|
||
pieces = sorted(replacements.keys())
|
||
# do them in order
|
||
for piece in pieces:
|
||
if piece in line:
|
||
line = line.replace(piece, replacements[piece])
|
||
return line
|
||
|
||
def escapeentities(self, line):
|
||
"Escape all Unicode characters to HTML entities."
|
||
result = ''
|
||
pos = TextPosition(line)
|
||
while not pos.finished():
|
||
if ord(pos.current()) > 128:
|
||
codepoint = hex(ord(pos.current()))
|
||
if codepoint == '0xd835':
|
||
codepoint = hex(ord(next(pos)) + 0xf800)
|
||
result += '&#' + codepoint[1:] + ';'
|
||
else:
|
||
result += pos.current()
|
||
pos.skipcurrent()
|
||
return result
|
||
|
||
def searchall(self, type):
|
||
"Search for all embedded containers of a given type"
|
||
list = []
|
||
self.searchprocess(type, lambda container: list.append(container))
|
||
return list
|
||
|
||
def searchremove(self, type):
|
||
"Search for all containers of a type and remove them"
|
||
list = self.searchall(type)
|
||
for container in list:
|
||
container.parent.contents.remove(container)
|
||
return list
|
||
|
||
def searchprocess(self, type, process):
|
||
"Search for elements of a given type and process them"
|
||
self.locateprocess(lambda container: isinstance(container, type), process)
|
||
|
||
def locateprocess(self, locate, process):
|
||
"Search for all embedded containers and process them"
|
||
for container in self.contents:
|
||
container.locateprocess(locate, process)
|
||
if locate(container):
|
||
process(container)
|
||
|
||
def recursivesearch(self, locate, recursive, process):
|
||
"Perform a recursive search in the container."
|
||
for container in self.contents:
|
||
if recursive(container):
|
||
container.recursivesearch(locate, recursive, process)
|
||
if locate(container):
|
||
process(container)
|
||
|
||
def extracttext(self):
|
||
"Extract all text from allowed containers."
|
||
constants = ContainerExtractor(ContainerConfig.extracttext).extract(self)
|
||
return ''.join(constant.string for constant in constants)
|
||
|
||
def group(self, index, group, isingroup):
|
||
"Group some adjoining elements into a group"
|
||
if index >= len(self.contents):
|
||
return
|
||
if hasattr(self.contents[index], 'grouped'):
|
||
return
|
||
while index < len(self.contents) and isingroup(self.contents[index]):
|
||
self.contents[index].grouped = True
|
||
group.contents.append(self.contents[index])
|
||
self.contents.pop(index)
|
||
self.contents.insert(index, group)
|
||
|
||
def remove(self, index):
|
||
"Remove a container but leave its contents"
|
||
container = self.contents[index]
|
||
self.contents.pop(index)
|
||
while len(container.contents) > 0:
|
||
self.contents.insert(index, container.contents.pop())
|
||
|
||
def tree(self, level=0):
|
||
"Show in a tree"
|
||
Trace.debug(" " * level + str(self))
|
||
for container in self.contents:
|
||
container.tree(level + 1)
|
||
|
||
def getparameter(self, name):
|
||
"Get the value of a parameter, if present."
|
||
if name not in self.parameters:
|
||
return None
|
||
return self.parameters[name]
|
||
|
||
def getparameterlist(self, name):
|
||
"Get the value of a comma-separated parameter as a list."
|
||
paramtext = self.getparameter(name)
|
||
if not paramtext:
|
||
return []
|
||
return paramtext.split(',')
|
||
|
||
def hasemptyoutput(self):
|
||
"Check if the parent's output is empty."
|
||
current = self.parent
|
||
while current:
|
||
if current.output.isempty():
|
||
return True
|
||
current = current.parent
|
||
return False
|
||
|
||
def __str__(self):
|
||
"Get a description"
|
||
if not self.begin:
|
||
return self.__class__.__name__
|
||
return self.__class__.__name__ + '@' + str(self.begin)
|
||
|
||
|
||
class BlackBox(Container):
|
||
"A container that does not output anything"
|
||
|
||
def __init__(self):
|
||
self.parser = LoneCommand()
|
||
self.output = EmptyOutput()
|
||
self.contents = []
|
||
|
||
|
||
class StringContainer(Container):
|
||
"A container for a single string"
|
||
|
||
parsed = None
|
||
|
||
def __init__(self):
|
||
self.parser = StringParser()
|
||
self.output = StringOutput()
|
||
self.string = ''
|
||
|
||
def process(self):
|
||
"Replace special chars from the contents."
|
||
if self.parsed:
|
||
self.string = self.replacespecial(self.parsed)
|
||
self.parsed = None
|
||
|
||
def replacespecial(self, line):
|
||
"Replace all special chars from a line"
|
||
replaced = self.escape(line, EscapeConfig.entities)
|
||
replaced = self.changeline(replaced)
|
||
if ContainerConfig.string['startcommand'] in replaced and len(replaced) > 1:
|
||
# unprocessed commands
|
||
if self.begin:
|
||
message = 'Unknown command at ' + str(self.begin) + ': '
|
||
else:
|
||
message = 'Unknown command: '
|
||
Trace.error(message + replaced.strip())
|
||
return replaced
|
||
|
||
def changeline(self, line):
|
||
return self.escape(line, EscapeConfig.chars)
|
||
|
||
def extracttext(self):
|
||
"Return all text."
|
||
return self.string
|
||
|
||
def __str__(self):
|
||
"Return a printable representation."
|
||
result = 'StringContainer'
|
||
if self.begin:
|
||
result += '@' + str(self.begin)
|
||
ellipsis = '...'
|
||
if len(self.string.strip()) <= 15:
|
||
ellipsis = ''
|
||
return result + ' (' + self.string.strip()[:15] + ellipsis + ')'
|
||
|
||
|
||
class Constant(StringContainer):
|
||
"A constant string"
|
||
|
||
def __init__(self, text):
|
||
self.contents = []
|
||
self.string = text
|
||
self.output = StringOutput()
|
||
|
||
def __str__(self):
|
||
return 'Constant: ' + self.string
|
||
|
||
|
||
class DocumentParameters:
|
||
"Global parameters for the document."
|
||
|
||
displaymode = False
|
||
|
||
|
||
class FormulaParser(Parser):
|
||
"Parses a formula"
|
||
|
||
def parseheader(self, reader):
|
||
"See if the formula is inlined"
|
||
self.begin = reader.linenumber + 1
|
||
type = self.parsetype(reader)
|
||
if not type:
|
||
reader.nextline()
|
||
type = self.parsetype(reader)
|
||
if not type:
|
||
Trace.error('Unknown formula type in ' + reader.currentline().strip())
|
||
return ['unknown']
|
||
return [type]
|
||
|
||
def parsetype(self, reader):
|
||
"Get the formula type from the first line."
|
||
if reader.currentline().find(FormulaConfig.starts['simple']) >= 0:
|
||
return 'inline'
|
||
if reader.currentline().find(FormulaConfig.starts['complex']) >= 0:
|
||
return 'block'
|
||
if reader.currentline().find(FormulaConfig.starts['unnumbered']) >= 0:
|
||
return 'block'
|
||
if reader.currentline().find(FormulaConfig.starts['beginbefore']) >= 0:
|
||
return 'numbered'
|
||
return None
|
||
|
||
def parse(self, reader):
|
||
"Parse the formula until the end"
|
||
formula = self.parseformula(reader)
|
||
while not reader.currentline().startswith(self.ending):
|
||
stripped = reader.currentline().strip()
|
||
if len(stripped) > 0:
|
||
Trace.error('Unparsed formula line ' + stripped)
|
||
reader.nextline()
|
||
reader.nextline()
|
||
return formula
|
||
|
||
def parseformula(self, reader):
|
||
"Parse the formula contents"
|
||
simple = FormulaConfig.starts['simple']
|
||
if simple in reader.currentline():
|
||
rest = reader.currentline().split(simple, 1)[1]
|
||
if simple in rest:
|
||
# formula is $...$
|
||
return self.parsesingleliner(reader, simple, simple)
|
||
# formula is multiline $...$
|
||
return self.parsemultiliner(reader, simple, simple)
|
||
if FormulaConfig.starts['complex'] in reader.currentline():
|
||
# formula of the form \[...\]
|
||
return self.parsemultiliner(reader, FormulaConfig.starts['complex'],
|
||
FormulaConfig.endings['complex'])
|
||
beginbefore = FormulaConfig.starts['beginbefore']
|
||
beginafter = FormulaConfig.starts['beginafter']
|
||
if beginbefore in reader.currentline():
|
||
if reader.currentline().strip().endswith(beginafter):
|
||
current = reader.currentline().strip()
|
||
endsplit = current.split(beginbefore)[1].split(beginafter)
|
||
startpiece = beginbefore + endsplit[0] + beginafter
|
||
endbefore = FormulaConfig.endings['endbefore']
|
||
endafter = FormulaConfig.endings['endafter']
|
||
endpiece = endbefore + endsplit[0] + endafter
|
||
return startpiece + self.parsemultiliner(reader, startpiece, endpiece) + endpiece
|
||
Trace.error('Missing ' + beginafter + ' in ' + reader.currentline())
|
||
return ''
|
||
begincommand = FormulaConfig.starts['command']
|
||
beginbracket = FormulaConfig.starts['bracket']
|
||
if begincommand in reader.currentline() and beginbracket in reader.currentline():
|
||
endbracket = FormulaConfig.endings['bracket']
|
||
return self.parsemultiliner(reader, beginbracket, endbracket)
|
||
Trace.error('Formula beginning ' + reader.currentline() + ' is unknown')
|
||
return ''
|
||
|
||
def parsesingleliner(self, reader, start, ending):
|
||
"Parse a formula in one line"
|
||
line = reader.currentline().strip()
|
||
if start not in line:
|
||
Trace.error('Line ' + line + ' does not contain formula start ' + start)
|
||
return ''
|
||
if not line.endswith(ending):
|
||
Trace.error('Formula ' + line + ' does not end with ' + ending)
|
||
return ''
|
||
index = line.index(start)
|
||
rest = line[index + len(start):-len(ending)]
|
||
reader.nextline()
|
||
return rest
|
||
|
||
def parsemultiliner(self, reader, start, ending):
|
||
"Parse a formula in multiple lines"
|
||
formula = ''
|
||
line = reader.currentline()
|
||
if start not in line:
|
||
Trace.error('Line ' + line.strip() + ' does not contain formula start ' + start)
|
||
return ''
|
||
index = line.index(start)
|
||
line = line[index + len(start):].strip()
|
||
while not line.endswith(ending):
|
||
formula += line + '\n'
|
||
reader.nextline()
|
||
line = reader.currentline()
|
||
formula += line[:-len(ending)]
|
||
reader.nextline()
|
||
return formula
|
||
|
||
|
||
class FormulaBit(Container):
|
||
"A bit of a formula"
|
||
|
||
type = None
|
||
size = 1
|
||
original = ''
|
||
|
||
def __init__(self):
|
||
"The formula bit type can be 'alpha', 'number', 'font'."
|
||
self.contents = []
|
||
self.output = ContentsOutput()
|
||
|
||
def setfactory(self, factory):
|
||
"Set the internal formula factory."
|
||
self.factory = factory
|
||
return self
|
||
|
||
def add(self, bit):
|
||
"Add any kind of formula bit already processed"
|
||
self.contents.append(bit)
|
||
self.original += bit.original
|
||
bit.parent = self
|
||
|
||
def skiporiginal(self, string, pos):
|
||
"Skip a string and add it to the original formula"
|
||
self.original += string
|
||
if not pos.checkskip(string):
|
||
Trace.error('String ' + string + ' not at ' + pos.identifier())
|
||
|
||
def computesize(self):
|
||
"Compute the size of the bit as the max of the sizes of all contents."
|
||
if len(self.contents) == 0:
|
||
return 1
|
||
self.size = max(element.size for element in self.contents)
|
||
return self.size
|
||
|
||
def clone(self):
|
||
"Return a copy of itself."
|
||
return self.factory.parseformula(self.original)
|
||
|
||
def __str__(self):
|
||
"Get a string representation"
|
||
return self.__class__.__name__ + ' read in ' + self.original
|
||
|
||
|
||
class TaggedBit(FormulaBit):
|
||
"A tagged string in a formula"
|
||
|
||
def constant(self, constant, tag):
|
||
"Set the constant and the tag"
|
||
self.output = TaggedOutput().settag(tag)
|
||
self.add(FormulaConstant(constant))
|
||
return self
|
||
|
||
def complete(self, contents, tag, breaklines=False):
|
||
"Set the constant and the tag"
|
||
self.contents = contents
|
||
self.output = TaggedOutput().settag(tag, breaklines)
|
||
return self
|
||
|
||
def selfcomplete(self, tag):
|
||
"Set the self-closing tag, no contents (as in <hr/>)."
|
||
self.output = TaggedOutput().settag(tag, empty=True)
|
||
return self
|
||
|
||
|
||
class FormulaConstant(Constant):
|
||
"A constant string in a formula"
|
||
|
||
def __init__(self, string):
|
||
"Set the constant string"
|
||
Constant.__init__(self, string)
|
||
self.original = string
|
||
self.size = 1
|
||
self.type = None
|
||
|
||
def computesize(self):
|
||
"Compute the size of the constant: always 1."
|
||
return self.size
|
||
|
||
def clone(self):
|
||
"Return a copy of itself."
|
||
return FormulaConstant(self.original)
|
||
|
||
def __str__(self):
|
||
"Return a printable representation."
|
||
return 'Formula constant: ' + self.string
|
||
|
||
|
||
class RawText(FormulaBit):
|
||
"A bit of text inside a formula"
|
||
|
||
def detect(self, pos):
|
||
"Detect a bit of raw text"
|
||
return pos.current().isalpha()
|
||
|
||
def parsebit(self, pos):
|
||
"Parse alphabetic text"
|
||
alpha = pos.globalpha()
|
||
self.add(FormulaConstant(alpha))
|
||
self.type = 'alpha'
|
||
|
||
|
||
class FormulaSymbol(FormulaBit):
|
||
"A symbol inside a formula"
|
||
|
||
modified = FormulaConfig.modified
|
||
unmodified = FormulaConfig.unmodified['characters']
|
||
|
||
def detect(self, pos):
|
||
"Detect a symbol"
|
||
if pos.current() in FormulaSymbol.unmodified:
|
||
return True
|
||
if pos.current() in FormulaSymbol.modified:
|
||
return True
|
||
return False
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the symbol"
|
||
if pos.current() in FormulaSymbol.unmodified:
|
||
self.addsymbol(pos.current(), pos)
|
||
return
|
||
if pos.current() in FormulaSymbol.modified:
|
||
self.addsymbol(FormulaSymbol.modified[pos.current()], pos)
|
||
return
|
||
Trace.error('Symbol ' + pos.current() + ' not found')
|
||
|
||
def addsymbol(self, symbol, pos):
|
||
"Add a symbol"
|
||
self.skiporiginal(pos.current(), pos)
|
||
self.contents.append(FormulaConstant(symbol))
|
||
|
||
|
||
class FormulaNumber(FormulaBit):
|
||
"A string of digits in a formula"
|
||
|
||
def detect(self, pos):
|
||
"Detect a digit"
|
||
return pos.current().isdigit()
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a bunch of digits"
|
||
digits = pos.glob(lambda: pos.current().isdigit())
|
||
self.add(FormulaConstant(digits))
|
||
self.type = 'number'
|
||
|
||
|
||
class Comment(FormulaBit):
|
||
"A LaTeX comment: % to the end of the line."
|
||
|
||
start = FormulaConfig.starts['comment']
|
||
|
||
def detect(self, pos):
|
||
"Detect the %."
|
||
return pos.current() == self.start
|
||
|
||
def parsebit(self, pos):
|
||
"Parse to the end of the line."
|
||
self.original += pos.globincluding('\n')
|
||
|
||
|
||
class WhiteSpace(FormulaBit):
|
||
"Some white space inside a formula."
|
||
|
||
def detect(self, pos):
|
||
"Detect the white space."
|
||
return pos.current().isspace()
|
||
|
||
def parsebit(self, pos):
|
||
"Parse all whitespace."
|
||
self.original += pos.skipspace()
|
||
|
||
def __str__(self):
|
||
"Return a printable representation."
|
||
return 'Whitespace: *' + self.original + '*'
|
||
|
||
|
||
class Bracket(FormulaBit):
|
||
"A {} bracket inside a formula"
|
||
|
||
start = FormulaConfig.starts['bracket']
|
||
ending = FormulaConfig.endings['bracket']
|
||
|
||
def __init__(self):
|
||
"Create a (possibly literal) new bracket"
|
||
FormulaBit.__init__(self)
|
||
self.inner = None
|
||
|
||
def detect(self, pos):
|
||
"Detect the start of a bracket"
|
||
return pos.checkfor(self.start)
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the bracket"
|
||
self.parsecomplete(pos, self.innerformula)
|
||
return self
|
||
|
||
def parsetext(self, pos):
|
||
"Parse a text bracket"
|
||
self.parsecomplete(pos, self.innertext)
|
||
return self
|
||
|
||
def parseliteral(self, pos):
|
||
"Parse a literal bracket"
|
||
self.parsecomplete(pos, self.innerliteral)
|
||
return self
|
||
|
||
def parsecomplete(self, pos, innerparser):
|
||
"Parse the start and end marks"
|
||
if not pos.checkfor(self.start):
|
||
Trace.error('Bracket should start with ' + self.start + ' at ' + pos.identifier())
|
||
return None
|
||
self.skiporiginal(self.start, pos)
|
||
pos.pushending(self.ending)
|
||
innerparser(pos)
|
||
self.original += pos.popending(self.ending)
|
||
self.computesize()
|
||
|
||
def innerformula(self, pos):
|
||
"Parse a whole formula inside the bracket"
|
||
while not pos.finished():
|
||
self.add(self.factory.parseany(pos))
|
||
|
||
def innertext(self, pos):
|
||
"Parse some text inside the bracket, following textual rules."
|
||
specialchars = list(FormulaConfig.symbolfunctions.keys())
|
||
specialchars.append(FormulaConfig.starts['command'])
|
||
specialchars.append(FormulaConfig.starts['bracket'])
|
||
specialchars.append(Comment.start)
|
||
while not pos.finished():
|
||
if pos.current() in specialchars:
|
||
self.add(self.factory.parseany(pos))
|
||
if pos.checkskip(' '):
|
||
self.original += ' '
|
||
else:
|
||
self.add(FormulaConstant(pos.skipcurrent()))
|
||
|
||
def innerliteral(self, pos):
|
||
"Parse a literal inside the bracket, which does not generate HTML."
|
||
self.literal = ''
|
||
while not pos.finished() and not pos.current() == self.ending:
|
||
if pos.current() == self.start:
|
||
self.parseliteral(pos)
|
||
else:
|
||
self.literal += pos.skipcurrent()
|
||
self.original += self.literal
|
||
|
||
|
||
class SquareBracket(Bracket):
|
||
"A [] bracket inside a formula"
|
||
|
||
start = FormulaConfig.starts['squarebracket']
|
||
ending = FormulaConfig.endings['squarebracket']
|
||
|
||
def clone(self):
|
||
"Return a new square bracket with the same contents."
|
||
bracket = SquareBracket()
|
||
bracket.contents = self.contents
|
||
return bracket
|
||
|
||
|
||
class MathsProcessor:
|
||
"A processor for a maths construction inside the FormulaProcessor."
|
||
|
||
def process(self, contents, index):
|
||
"Process an element inside a formula."
|
||
Trace.error('Unimplemented process() in ' + str(self))
|
||
|
||
def __str__(self):
|
||
"Return a printable description."
|
||
return 'Maths processor ' + self.__class__.__name__
|
||
|
||
|
||
class FormulaProcessor:
|
||
"A processor specifically for formulas."
|
||
|
||
processors = []
|
||
|
||
def process(self, bit):
|
||
"Process the contents of every formula bit, recursively."
|
||
self.processcontents(bit)
|
||
self.processinsides(bit)
|
||
self.traversewhole(bit)
|
||
|
||
def processcontents(self, bit):
|
||
"Process the contents of a formula bit."
|
||
if not isinstance(bit, FormulaBit):
|
||
return
|
||
bit.process()
|
||
for element in bit.contents:
|
||
self.processcontents(element)
|
||
|
||
def processinsides(self, bit):
|
||
"Process the insides (limits, brackets) in a formula bit."
|
||
if not isinstance(bit, FormulaBit):
|
||
return
|
||
for index, element in enumerate(bit.contents):
|
||
for processor in self.processors:
|
||
processor.process(bit.contents, index)
|
||
# continue with recursive processing
|
||
self.processinsides(element)
|
||
|
||
def traversewhole(self, formula):
|
||
"Traverse over the contents to alter variables and space units."
|
||
last = None
|
||
for bit, contents in self.traverse(formula):
|
||
if bit.type == 'alpha':
|
||
self.italicize(bit, contents)
|
||
elif bit.type == 'font' and last and last.type == 'number':
|
||
bit.contents.insert(0, FormulaConstant('\u2009'))
|
||
last = bit
|
||
|
||
def traverse(self, bit):
|
||
"Traverse a formula and yield a flattened structure of (bit, list) pairs."
|
||
for element in bit.contents:
|
||
if hasattr(element, 'type') and element.type:
|
||
yield element, bit.contents
|
||
elif isinstance(element, FormulaBit):
|
||
yield from self.traverse(element)
|
||
|
||
def italicize(self, bit, contents):
|
||
"Italicize the given bit of text."
|
||
index = contents.index(bit)
|
||
contents[index] = TaggedBit().complete([bit], 'i')
|
||
|
||
|
||
class Formula(Container):
|
||
"A LaTeX formula"
|
||
|
||
def __init__(self):
|
||
self.parser = FormulaParser()
|
||
self.output = TaggedOutput().settag('span class="formula"')
|
||
|
||
def process(self):
|
||
"Convert the formula to tags"
|
||
if self.header[0] == 'inline':
|
||
DocumentParameters.displaymode = False
|
||
else:
|
||
DocumentParameters.displaymode = True
|
||
self.output.settag('div class="formula"', True)
|
||
self.classic()
|
||
|
||
def classic(self):
|
||
"Make the contents using classic output generation with XHTML and CSS."
|
||
whole = FormulaFactory().parseformula(self.parsed)
|
||
FormulaProcessor().process(whole)
|
||
whole.parent = self
|
||
self.contents = [whole]
|
||
|
||
def parse(self, pos):
|
||
"Parse using a parse position instead of self.parser."
|
||
if pos.checkskip('$$'):
|
||
self.parsedollarblock(pos)
|
||
elif pos.checkskip('$'):
|
||
self.parsedollarinline(pos)
|
||
elif pos.checkskip('\\('):
|
||
self.parseinlineto(pos, '\\)')
|
||
elif pos.checkskip('\\['):
|
||
self.parseblockto(pos, '\\]')
|
||
else:
|
||
pos.error('Unparseable formula')
|
||
self.process()
|
||
return self
|
||
|
||
def parsedollarinline(self, pos):
|
||
"Parse a $...$ formula."
|
||
self.header = ['inline']
|
||
self.parsedollar(pos)
|
||
|
||
def parsedollarblock(self, pos):
|
||
"Parse a $$...$$ formula."
|
||
self.header = ['block']
|
||
self.parsedollar(pos)
|
||
if not pos.checkskip('$'):
|
||
pos.error('Formula should be $$...$$, but last $ is missing.')
|
||
|
||
def parsedollar(self, pos):
|
||
"Parse to the next $."
|
||
pos.pushending('$')
|
||
self.parsed = pos.globexcluding('$')
|
||
pos.popending('$')
|
||
|
||
def parseinlineto(self, pos, limit):
|
||
"Parse a \\(...\\) formula."
|
||
self.header = ['inline']
|
||
self.parseupto(pos, limit)
|
||
|
||
def parseblockto(self, pos, limit):
|
||
"Parse a \\[...\\] formula."
|
||
self.header = ['block']
|
||
self.parseupto(pos, limit)
|
||
|
||
def parseupto(self, pos, limit):
|
||
"Parse a formula that ends with the given command."
|
||
pos.pushending(limit)
|
||
self.parsed = pos.glob(lambda: True)
|
||
pos.popending(limit)
|
||
|
||
def __str__(self):
|
||
"Return a printable representation."
|
||
if self.partkey and self.partkey.number:
|
||
return 'Formula (' + self.partkey.number + ')'
|
||
return 'Unnumbered formula'
|
||
|
||
|
||
class WholeFormula(FormulaBit):
|
||
"Parse a whole formula"
|
||
|
||
def detect(self, pos):
|
||
"Not outside the formula is enough."
|
||
return not pos.finished()
|
||
|
||
def parsebit(self, pos):
|
||
"Parse with any formula bit"
|
||
while not pos.finished():
|
||
self.add(self.factory.parseany(pos))
|
||
|
||
|
||
class FormulaFactory:
|
||
"Construct bits of formula"
|
||
|
||
# bit types will be appended later
|
||
types = [FormulaSymbol, RawText, FormulaNumber, Bracket, Comment, WhiteSpace]
|
||
skippedtypes = [Comment, WhiteSpace]
|
||
defining = False
|
||
|
||
def __init__(self):
|
||
"Initialize the map of instances."
|
||
self.instances = {}
|
||
|
||
def detecttype(self, type, pos):
|
||
"Detect a bit of a given type."
|
||
if pos.finished():
|
||
return False
|
||
return self.instance(type).detect(pos)
|
||
|
||
def instance(self, type):
|
||
"Get an instance of the given type."
|
||
if type not in self.instances or not self.instances[type]:
|
||
self.instances[type] = self.create(type)
|
||
return self.instances[type]
|
||
|
||
def create(self, type):
|
||
"Create a new formula bit of the given type."
|
||
return Cloner.create(type).setfactory(self)
|
||
|
||
def clearskipped(self, pos):
|
||
"Clear any skipped types."
|
||
while not pos.finished():
|
||
if not self.skipany(pos):
|
||
return
|
||
return
|
||
|
||
def skipany(self, pos):
|
||
"Skip any skipped types."
|
||
for type in self.skippedtypes:
|
||
if self.instance(type).detect(pos):
|
||
return self.parsetype(type, pos)
|
||
return None
|
||
|
||
def parseany(self, pos):
|
||
"Parse any formula bit at the current location."
|
||
for type in self.types + self.skippedtypes:
|
||
if self.detecttype(type, pos):
|
||
return self.parsetype(type, pos)
|
||
Trace.error('Unrecognized formula at ' + pos.identifier())
|
||
return FormulaConstant(pos.skipcurrent())
|
||
|
||
def parsetype(self, type, pos):
|
||
"Parse the given type and return it."
|
||
bit = self.instance(type)
|
||
self.instances[type] = None
|
||
returnedbit = bit.parsebit(pos)
|
||
if returnedbit:
|
||
return returnedbit.setfactory(self)
|
||
return bit
|
||
|
||
def parseformula(self, formula):
|
||
"Parse a string of text that contains a whole formula."
|
||
pos = TextPosition(formula)
|
||
whole = self.create(WholeFormula)
|
||
if whole.detect(pos):
|
||
whole.parsebit(pos)
|
||
return whole
|
||
# no formula found
|
||
if not pos.finished():
|
||
Trace.error('Unknown formula at: ' + pos.identifier())
|
||
whole.add(TaggedBit().constant(formula, 'span class="unknown"'))
|
||
return whole
|
||
|
||
|
||
class FormulaCommand(FormulaBit):
|
||
"A LaTeX command inside a formula"
|
||
|
||
types = []
|
||
start = FormulaConfig.starts['command']
|
||
commandmap = None
|
||
|
||
def detect(self, pos):
|
||
"Find the current command."
|
||
return pos.checkfor(FormulaCommand.start)
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the command."
|
||
command = self.extractcommand(pos)
|
||
bit = self.parsewithcommand(command, pos)
|
||
if bit:
|
||
return bit
|
||
if command.startswith('\\up') or command.startswith('\\Up'):
|
||
upgreek = self.parseupgreek(command, pos)
|
||
if upgreek:
|
||
return upgreek
|
||
if not self.factory.defining:
|
||
Trace.error('Unknown command ' + command)
|
||
self.output = TaggedOutput().settag('span class="unknown"')
|
||
self.add(FormulaConstant(command))
|
||
return None
|
||
|
||
def parsewithcommand(self, command, pos):
|
||
"Parse the command type once we have the command."
|
||
for type in FormulaCommand.types:
|
||
if command in type.commandmap:
|
||
return self.parsecommandtype(command, type, pos)
|
||
return None
|
||
|
||
def parsecommandtype(self, command, type, pos):
|
||
"Parse a given command type."
|
||
bit = self.factory.create(type)
|
||
bit.setcommand(command)
|
||
returned = bit.parsebit(pos)
|
||
if returned:
|
||
return returned
|
||
return bit
|
||
|
||
def extractcommand(self, pos):
|
||
"Extract the command from the current position."
|
||
if not pos.checkskip(FormulaCommand.start):
|
||
pos.error('Missing command start ' + FormulaCommand.start)
|
||
return
|
||
if pos.finished():
|
||
return self.emptycommand(pos)
|
||
if pos.current().isalpha():
|
||
# alpha command
|
||
command = FormulaCommand.start + pos.globalpha()
|
||
# skip mark of short command
|
||
pos.checkskip('*')
|
||
return command
|
||
# symbol command
|
||
return FormulaCommand.start + pos.skipcurrent()
|
||
|
||
def emptycommand(self, pos):
|
||
"""Check for an empty command: look for command disguised as ending.
|
||
Special case against '{ \\{ \\} }' situation."""
|
||
command = ''
|
||
if not pos.isout():
|
||
ending = pos.nextending()
|
||
if ending and pos.checkskip(ending):
|
||
command = ending
|
||
return FormulaCommand.start + command
|
||
|
||
def parseupgreek(self, command, pos):
|
||
"Parse the Greek \\up command.."
|
||
if len(command) < 4:
|
||
return None
|
||
if command.startswith('\\up'):
|
||
upcommand = '\\' + command[3:]
|
||
elif pos.checkskip('\\Up'):
|
||
upcommand = '\\' + command[3:4].upper() + command[4:]
|
||
else:
|
||
Trace.error('Impossible upgreek command: ' + command)
|
||
return
|
||
upgreek = self.parsewithcommand(upcommand, pos)
|
||
if upgreek:
|
||
upgreek.type = 'font'
|
||
return upgreek
|
||
|
||
|
||
class CommandBit(FormulaCommand):
|
||
"A formula bit that includes a command"
|
||
|
||
def setcommand(self, command):
|
||
"Set the command in the bit"
|
||
self.command = command
|
||
if self.commandmap:
|
||
self.original += command
|
||
self.translated = self.commandmap[self.command]
|
||
|
||
def parseparameter(self, pos):
|
||
"Parse a parameter at the current position"
|
||
self.factory.clearskipped(pos)
|
||
if pos.finished():
|
||
return None
|
||
parameter = self.factory.parseany(pos)
|
||
self.add(parameter)
|
||
return parameter
|
||
|
||
def parsesquare(self, pos):
|
||
"Parse a square bracket"
|
||
self.factory.clearskipped(pos)
|
||
if not self.factory.detecttype(SquareBracket, pos):
|
||
return None
|
||
bracket = self.factory.parsetype(SquareBracket, pos)
|
||
self.add(bracket)
|
||
return bracket
|
||
|
||
def parseliteral(self, pos):
|
||
"Parse a literal bracket."
|
||
self.factory.clearskipped(pos)
|
||
if not self.factory.detecttype(Bracket, pos):
|
||
if not pos.isvalue():
|
||
Trace.error('No literal parameter found at: ' + pos.identifier())
|
||
return None
|
||
return pos.globvalue()
|
||
bracket = Bracket().setfactory(self.factory)
|
||
self.add(bracket.parseliteral(pos))
|
||
return bracket.literal
|
||
|
||
def parsesquareliteral(self, pos):
|
||
"Parse a square bracket literally."
|
||
self.factory.clearskipped(pos)
|
||
if not self.factory.detecttype(SquareBracket, pos):
|
||
return None
|
||
bracket = SquareBracket().setfactory(self.factory)
|
||
self.add(bracket.parseliteral(pos))
|
||
return bracket.literal
|
||
|
||
def parsetext(self, pos):
|
||
"Parse a text parameter."
|
||
self.factory.clearskipped(pos)
|
||
if not self.factory.detecttype(Bracket, pos):
|
||
Trace.error('No text parameter for ' + self.command)
|
||
return None
|
||
bracket = Bracket().setfactory(self.factory).parsetext(pos)
|
||
self.add(bracket)
|
||
return bracket
|
||
|
||
|
||
class EmptyCommand(CommandBit):
|
||
"An empty command (without parameters)"
|
||
|
||
commandmap = FormulaConfig.commands
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a command without parameters"
|
||
self.contents = [FormulaConstant(self.translated)]
|
||
|
||
|
||
class SpacedCommand(CommandBit):
|
||
"""An empty command which should have math spacing in formulas."""
|
||
|
||
commandmap = FormulaConfig.spacedcommands
|
||
|
||
def parsebit(self, pos):
|
||
"Place as contents the command translated and spaced."
|
||
# pad with MEDIUM MATHEMATICAL SPACE (4/18 em): too wide in STIX fonts :(
|
||
# self.contents = [FormulaConstant('\u205f' + self.translated + '\u205f')]
|
||
# pad with THIN SPACE (1/5 em)
|
||
self.contents = [FormulaConstant('\u2009' + self.translated + '\u2009')]
|
||
|
||
|
||
class AlphaCommand(EmptyCommand):
|
||
"""A command without parameters whose result is alphabetical."""
|
||
|
||
commandmap = FormulaConfig.alphacommands
|
||
greek_capitals = ('\\Xi', '\\Theta', '\\Pi', '\\Sigma', '\\Gamma',
|
||
'\\Lambda', '\\Phi', '\\Psi', '\\Delta',
|
||
'\\Upsilon', '\\Omega')
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the command and set type to alpha"
|
||
EmptyCommand.parsebit(self, pos)
|
||
if self.command not in self.greek_capitals:
|
||
# Greek Capital letters are upright in LaTeX default math-style.
|
||
# TODO: use italic, like in MathML and "iso" math-style?
|
||
self.type = 'alpha'
|
||
|
||
|
||
class OneParamFunction(CommandBit):
|
||
"A function of one parameter"
|
||
|
||
commandmap = FormulaConfig.onefunctions
|
||
simplified = False
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a function with one parameter"
|
||
self.output = TaggedOutput().settag(self.translated)
|
||
self.parseparameter(pos)
|
||
self.simplifyifpossible()
|
||
|
||
def simplifyifpossible(self):
|
||
"Try to simplify to a single character."
|
||
if self.original in self.commandmap:
|
||
self.output = FixedOutput()
|
||
self.html = [self.commandmap[self.original]]
|
||
self.simplified = True
|
||
|
||
|
||
class SymbolFunction(CommandBit):
|
||
"Find a function which is represented by a symbol (like _ or ^)"
|
||
|
||
commandmap = FormulaConfig.symbolfunctions
|
||
|
||
def detect(self, pos):
|
||
"Find the symbol"
|
||
return pos.current() in SymbolFunction.commandmap
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the symbol"
|
||
self.setcommand(pos.current())
|
||
pos.skip(self.command)
|
||
self.output = TaggedOutput().settag(self.translated)
|
||
self.parseparameter(pos)
|
||
|
||
|
||
class TextFunction(CommandBit):
|
||
"A function where parameters are read as text."
|
||
|
||
commandmap = FormulaConfig.textfunctions
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a text parameter"
|
||
self.output = TaggedOutput().settag(self.translated)
|
||
self.parsetext(pos)
|
||
|
||
def process(self):
|
||
"Set the type to font"
|
||
self.type = 'font'
|
||
|
||
|
||
class FontFunction(OneParamFunction):
|
||
"""A function of one parameter that changes the font."""
|
||
# TODO: keep letters italic with \boldsymbol.
|
||
|
||
commandmap = FormulaConfig.fontfunctions
|
||
|
||
def process(self):
|
||
"Simplify if possible using a single character."
|
||
self.type = 'font'
|
||
self.simplifyifpossible()
|
||
|
||
|
||
FormulaFactory.types += [FormulaCommand, SymbolFunction]
|
||
FormulaCommand.types = [
|
||
AlphaCommand, EmptyCommand, OneParamFunction, FontFunction,
|
||
TextFunction, SpacedCommand]
|
||
|
||
|
||
class BigBracket:
|
||
"A big bracket generator."
|
||
|
||
def __init__(self, size, bracket, alignment='l'):
|
||
"Set the size and symbol for the bracket."
|
||
self.size = size
|
||
self.original = bracket
|
||
self.alignment = alignment
|
||
self.pieces = None
|
||
if bracket in FormulaConfig.bigbrackets:
|
||
self.pieces = FormulaConfig.bigbrackets[bracket]
|
||
|
||
def getpiece(self, index):
|
||
"Return the nth piece for the bracket."
|
||
function = getattr(self, 'getpiece' + str(len(self.pieces)))
|
||
return function(index)
|
||
|
||
def getpiece1(self, index):
|
||
"Return the only piece for a single-piece bracket."
|
||
return self.pieces[0]
|
||
|
||
def getpiece3(self, index):
|
||
"Get the nth piece for a 3-piece bracket: parenthesis or square bracket."
|
||
if index == 0:
|
||
return self.pieces[0]
|
||
if index == self.size - 1:
|
||
return self.pieces[-1]
|
||
return self.pieces[1]
|
||
|
||
def getpiece4(self, index):
|
||
"Get the nth piece for a 4-piece bracket: curly bracket."
|
||
if index == 0:
|
||
return self.pieces[0]
|
||
if index == self.size - 1:
|
||
return self.pieces[3]
|
||
if index == (self.size - 1)/2:
|
||
return self.pieces[2]
|
||
return self.pieces[1]
|
||
|
||
def getcell(self, index):
|
||
"Get the bracket piece as an array cell."
|
||
piece = self.getpiece(index)
|
||
span = 'span class="bracket align-' + self.alignment + '"'
|
||
return TaggedBit().constant(piece, span)
|
||
|
||
def getcontents(self):
|
||
"Get the bracket as an array or as a single bracket."
|
||
if self.size == 1 or not self.pieces:
|
||
return self.getsinglebracket()
|
||
rows = []
|
||
for index in range(self.size):
|
||
cell = self.getcell(index)
|
||
rows.append(TaggedBit().complete([cell], 'span class="arrayrow"'))
|
||
return [TaggedBit().complete(rows, 'span class="array"')]
|
||
|
||
def getsinglebracket(self):
|
||
"Return the bracket as a single sign."
|
||
if self.original == '.':
|
||
return [TaggedBit().constant('', 'span class="emptydot"')]
|
||
return [TaggedBit().constant(self.original, 'span class="stretchy"')]
|
||
|
||
|
||
class FormulaEquation(CommandBit):
|
||
"A simple numbered equation."
|
||
|
||
piece = 'equation'
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the array"
|
||
self.output = ContentsOutput()
|
||
self.add(self.factory.parsetype(WholeFormula, pos))
|
||
|
||
|
||
class FormulaCell(FormulaCommand):
|
||
"An array cell inside a row"
|
||
|
||
def setalignment(self, alignment):
|
||
self.alignment = alignment
|
||
self.output = TaggedOutput().settag('span class="arraycell align-'
|
||
+ alignment + '"', True)
|
||
return self
|
||
|
||
def parsebit(self, pos):
|
||
self.factory.clearskipped(pos)
|
||
if pos.finished():
|
||
return
|
||
self.add(self.factory.parsetype(WholeFormula, pos))
|
||
|
||
|
||
class FormulaRow(FormulaCommand):
|
||
"An array row inside an array"
|
||
|
||
cellseparator = FormulaConfig.array['cellseparator']
|
||
|
||
def setalignments(self, alignments):
|
||
self.alignments = alignments
|
||
self.output = TaggedOutput().settag('span class="arrayrow"', True)
|
||
return self
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a whole row"
|
||
index = 0
|
||
pos.pushending(self.cellseparator, optional=True)
|
||
while not pos.finished():
|
||
cell = self.createcell(index)
|
||
cell.parsebit(pos)
|
||
self.add(cell)
|
||
index += 1
|
||
pos.checkskip(self.cellseparator)
|
||
if len(self.contents) == 0:
|
||
self.output = EmptyOutput()
|
||
|
||
def createcell(self, index):
|
||
"Create the cell that corresponds to the given index."
|
||
alignment = self.alignments[index % len(self.alignments)]
|
||
return self.factory.create(FormulaCell).setalignment(alignment)
|
||
|
||
|
||
class MultiRowFormula(CommandBit):
|
||
"A formula with multiple rows."
|
||
|
||
def parserows(self, pos):
|
||
"Parse all rows, finish when no more row ends"
|
||
self.rows = []
|
||
first = True
|
||
for row in self.iteraterows(pos):
|
||
if first:
|
||
first = False
|
||
else:
|
||
# intersparse empty rows
|
||
self.addempty()
|
||
row.parsebit(pos)
|
||
self.addrow(row)
|
||
self.size = len(self.rows)
|
||
|
||
def iteraterows(self, pos):
|
||
"Iterate over all rows, end when no more row ends"
|
||
rowseparator = FormulaConfig.array['rowseparator']
|
||
while True:
|
||
pos.pushending(rowseparator, True)
|
||
row = self.factory.create(FormulaRow)
|
||
yield row.setalignments(self.alignments)
|
||
if pos.checkfor(rowseparator):
|
||
self.original += pos.popending(rowseparator)
|
||
else:
|
||
return
|
||
|
||
def addempty(self):
|
||
"Add an empty row."
|
||
row = self.factory.create(FormulaRow).setalignments(self.alignments)
|
||
for index, originalcell in enumerate(self.rows[-1].contents):
|
||
cell = row.createcell(index)
|
||
cell.add(FormulaConstant(' '))
|
||
row.add(cell)
|
||
self.addrow(row)
|
||
|
||
def addrow(self, row):
|
||
"Add a row to the contents and to the list of rows."
|
||
self.rows.append(row)
|
||
self.add(row)
|
||
|
||
|
||
class FormulaArray(MultiRowFormula):
|
||
"An array within a formula"
|
||
|
||
piece = 'array'
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the array"
|
||
self.output = TaggedOutput().settag('span class="array"', False)
|
||
self.parsealignments(pos)
|
||
self.parserows(pos)
|
||
|
||
def parsealignments(self, pos):
|
||
"Parse the different alignments"
|
||
# vertical
|
||
self.valign = 'c'
|
||
literal = self.parsesquareliteral(pos)
|
||
if literal:
|
||
self.valign = literal
|
||
# horizontal
|
||
literal = self.parseliteral(pos)
|
||
self.alignments = []
|
||
for s in literal:
|
||
self.alignments.append(s)
|
||
|
||
|
||
class FormulaMatrix(MultiRowFormula):
|
||
"A matrix (array with center alignment)."
|
||
|
||
piece = 'matrix'
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the matrix, set alignments to 'c'."
|
||
self.output = TaggedOutput().settag('span class="array"', False)
|
||
self.valign = 'c'
|
||
self.alignments = ['c']
|
||
self.parserows(pos)
|
||
|
||
|
||
class FormulaCases(MultiRowFormula):
|
||
"A cases statement"
|
||
|
||
piece = 'cases'
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the cases"
|
||
self.output = ContentsOutput()
|
||
self.alignments = ['l', 'l']
|
||
self.parserows(pos)
|
||
for row in self.contents:
|
||
for cell in row.contents:
|
||
cell.output.settag('span class="case align-l"', True)
|
||
cell.contents.append(FormulaConstant(' '))
|
||
array = TaggedBit().complete(self.contents, 'span class="bracketcases"', True)
|
||
brace = BigBracket(len(self.contents), '{', 'l')
|
||
self.contents = brace.getcontents() + [array]
|
||
|
||
|
||
class EquationEnvironment(MultiRowFormula):
|
||
"A \\begin{}...\\end equation environment with rows and cells."
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the whole environment."
|
||
environment = self.piece.replace('*', '')
|
||
self.output = TaggedOutput().settag(
|
||
'span class="environment %s"'%environment, False)
|
||
if environment in FormulaConfig.environments:
|
||
self.alignments = FormulaConfig.environments[environment]
|
||
else:
|
||
Trace.error('Unknown equation environment ' + self.piece)
|
||
# print in red
|
||
self.output = TaggedOutput().settag('span class="unknown"')
|
||
self.add(FormulaConstant('\\begin{%s} '%environment))
|
||
|
||
self.alignments = ['l']
|
||
self.parserows(pos)
|
||
|
||
|
||
class BeginCommand(CommandBit):
|
||
"A \\begin{}...\\end command and what it entails (array, cases, aligned)"
|
||
|
||
commandmap = {FormulaConfig.array['begin']: ''}
|
||
|
||
types = [FormulaEquation, FormulaArray, FormulaCases, FormulaMatrix]
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the begin command"
|
||
command = self.parseliteral(pos)
|
||
bit = self.findbit(command)
|
||
ending = FormulaConfig.array['end'] + '{' + command + '}'
|
||
pos.pushending(ending)
|
||
bit.parsebit(pos)
|
||
self.add(bit)
|
||
self.original += pos.popending(ending)
|
||
self.size = bit.size
|
||
|
||
def findbit(self, piece):
|
||
"Find the command bit corresponding to the \\begin{piece}"
|
||
for type in BeginCommand.types:
|
||
if piece.replace('*', '') == type.piece:
|
||
return self.factory.create(type)
|
||
bit = self.factory.create(EquationEnvironment)
|
||
bit.piece = piece
|
||
return bit
|
||
|
||
|
||
FormulaCommand.types += [BeginCommand]
|
||
|
||
|
||
class CombiningFunction(OneParamFunction):
|
||
|
||
commandmap = FormulaConfig.combiningfunctions
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a combining function."
|
||
combining = self.translated
|
||
parameter = self.parsesingleparameter(pos)
|
||
if not parameter:
|
||
Trace.error('Missing parameter for combining function ' + self.command)
|
||
return
|
||
# Trace.message('apply %s to %r'%(self.command, parameter.extracttext()))
|
||
# parameter.tree()
|
||
if not isinstance(parameter, FormulaConstant):
|
||
try:
|
||
extractor = ContainerExtractor(ContainerConfig.extracttext)
|
||
parameter = extractor.extract(parameter)[0]
|
||
except IndexError:
|
||
Trace.error('No base character found for "%s".' % self.command)
|
||
return
|
||
# Trace.message(' basechar: %r' % parameter.string)
|
||
# Insert combining character after the first character:
|
||
if parameter.string.startswith('\u2009'):
|
||
i = 2 # skip padding by SpacedCommand and FormulaConfig.modified
|
||
else:
|
||
i = 1
|
||
parameter.string = parameter.string[:i] + combining + parameter.string[i:]
|
||
# Use pre-composed characters if possible: \not{=} -> ≠, say.
|
||
parameter.string = unicodedata.normalize('NFC', parameter.string)
|
||
|
||
def parsesingleparameter(self, pos):
|
||
"Parse a parameter, or a single letter."
|
||
self.factory.clearskipped(pos)
|
||
if pos.finished():
|
||
return None
|
||
return self.parseparameter(pos)
|
||
|
||
|
||
class OversetFunction(OneParamFunction):
|
||
"A function that decorates some bit of text with an overset."
|
||
|
||
commandmap = FormulaConfig.oversetfunctions
|
||
|
||
def parsebit(self, pos):
|
||
"Parse an overset-function"
|
||
symbol = self.translated
|
||
self.symbol = TaggedBit().constant(symbol, 'sup')
|
||
self.parameter = self.parseparameter(pos)
|
||
self.output = TaggedOutput().settag('span class="embellished"')
|
||
self.contents.insert(0, self.symbol)
|
||
self.parameter.output = TaggedOutput().settag('span class="base"')
|
||
self.simplifyifpossible()
|
||
|
||
|
||
class UndersetFunction(OneParamFunction):
|
||
"A function that decorates some bit of text with an underset."
|
||
|
||
commandmap = FormulaConfig.undersetfunctions
|
||
|
||
def parsebit(self, pos):
|
||
"Parse an underset-function"
|
||
symbol = self.translated
|
||
self.symbol = TaggedBit().constant(symbol, 'sub')
|
||
self.parameter = self.parseparameter(pos)
|
||
self.output = TaggedOutput().settag('span class="embellished"')
|
||
self.contents.insert(0, self.symbol)
|
||
self.parameter.output = TaggedOutput().settag('span class="base"')
|
||
self.simplifyifpossible()
|
||
|
||
|
||
class LimitCommand(EmptyCommand):
|
||
"A command which accepts limits above and below, in display mode."
|
||
|
||
commandmap = FormulaConfig.limitcommands
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a limit command."
|
||
self.output = TaggedOutput().settag('span class="limits"')
|
||
symbol = self.translated
|
||
self.contents.append(TaggedBit().constant(symbol, 'span class="limit"'))
|
||
|
||
|
||
class LimitPreviousCommand(LimitCommand):
|
||
"A command to limit the previous command."
|
||
|
||
commandmap = None
|
||
|
||
def parsebit(self, pos):
|
||
"Do nothing."
|
||
self.output = TaggedOutput().settag('span class="limits"')
|
||
self.factory.clearskipped(pos)
|
||
|
||
def __str__(self):
|
||
"Return a printable representation."
|
||
return 'Limit previous command'
|
||
|
||
|
||
class LimitsProcessor(MathsProcessor):
|
||
"A processor for limits inside an element."
|
||
|
||
def process(self, contents, index):
|
||
"Process the limits for an element."
|
||
if Options.simplemath:
|
||
return
|
||
if self.checklimits(contents, index):
|
||
self.modifylimits(contents, index)
|
||
if self.checkscript(contents, index) and self.checkscript(contents, index + 1):
|
||
self.modifyscripts(contents, index)
|
||
|
||
def checklimits(self, contents, index):
|
||
"Check if the current position has a limits command."
|
||
# TODO: check for \limits macro
|
||
if not DocumentParameters.displaymode:
|
||
return False
|
||
if self.checkcommand(contents, index + 1, LimitPreviousCommand):
|
||
self.limitsahead(contents, index)
|
||
return False
|
||
if not isinstance(contents[index], LimitCommand):
|
||
return False
|
||
return self.checkscript(contents, index + 1)
|
||
|
||
def limitsahead(self, contents, index):
|
||
"Limit the current element based on the next."
|
||
contents[index + 1].add(contents[index].clone())
|
||
contents[index].output = EmptyOutput()
|
||
|
||
def modifylimits(self, contents, index):
|
||
"Modify a limits commands so that the limits appear above and below."
|
||
limited = contents[index]
|
||
subscript = self.getlimit(contents, index + 1)
|
||
if self.checkscript(contents, index + 1):
|
||
superscript = self.getlimit(contents, index + 1)
|
||
else:
|
||
superscript = TaggedBit().constant('\u2009', 'sup class="limit"')
|
||
# fix order if source is x^i
|
||
if subscript.command == '^':
|
||
superscript, subscript = subscript, superscript
|
||
limited.contents.append(subscript)
|
||
limited.contents.insert(0, superscript)
|
||
|
||
def getlimit(self, contents, index):
|
||
"Get the limit for a limits command."
|
||
limit = self.getscript(contents, index)
|
||
limit.output.tag = limit.output.tag.replace('script', 'limit')
|
||
return limit
|
||
|
||
def modifyscripts(self, contents, index):
|
||
"Modify the super- and subscript to appear vertically aligned."
|
||
subscript = self.getscript(contents, index)
|
||
# subscript removed so instead of index + 1 we get index again
|
||
superscript = self.getscript(contents, index)
|
||
# super-/subscript are reversed if source is x^i_j
|
||
if subscript.command == '^':
|
||
superscript, subscript = subscript, superscript
|
||
scripts = TaggedBit().complete([superscript, subscript], 'span class="scripts"')
|
||
contents.insert(index, scripts)
|
||
|
||
def checkscript(self, contents, index):
|
||
"Check if the current element is a sub- or superscript."
|
||
return self.checkcommand(contents, index, SymbolFunction)
|
||
|
||
def checkcommand(self, contents, index, type):
|
||
"Check for the given type as the current element."
|
||
if len(contents) <= index:
|
||
return False
|
||
return isinstance(contents[index], type)
|
||
|
||
def getscript(self, contents, index):
|
||
"Get the sub- or superscript."
|
||
bit = contents[index]
|
||
bit.output.tag += ' class="script"'
|
||
del contents[index]
|
||
return bit
|
||
|
||
|
||
class BracketCommand(OneParamFunction):
|
||
"A command which defines a bracket."
|
||
|
||
commandmap = FormulaConfig.bracketcommands
|
||
|
||
def parsebit(self, pos):
|
||
"Parse the bracket."
|
||
OneParamFunction.parsebit(self, pos)
|
||
|
||
def create(self, direction, character):
|
||
"Create the bracket for the given character."
|
||
self.original = character
|
||
self.command = '\\' + direction
|
||
self.contents = [FormulaConstant(character)]
|
||
return self
|
||
|
||
|
||
class BracketProcessor(MathsProcessor):
|
||
"A processor for bracket commands."
|
||
|
||
def process(self, contents, index):
|
||
"Convert the bracket using Unicode pieces, if possible."
|
||
if Options.simplemath:
|
||
return
|
||
if self.checkleft(contents, index):
|
||
return self.processleft(contents, index)
|
||
|
||
def processleft(self, contents, index):
|
||
"Process a left bracket."
|
||
rightindex = self.findright(contents, index + 1)
|
||
if not rightindex:
|
||
return
|
||
size = self.findmax(contents, index, rightindex)
|
||
self.resize(contents[index], size)
|
||
self.resize(contents[rightindex], size)
|
||
|
||
def checkleft(self, contents, index):
|
||
"Check if the command at the given index is left."
|
||
return self.checkdirection(contents[index], '\\left')
|
||
|
||
def checkright(self, contents, index):
|
||
"Check if the command at the given index is right."
|
||
return self.checkdirection(contents[index], '\\right')
|
||
|
||
def checkdirection(self, bit, command):
|
||
"Check if the given bit is the desired bracket command."
|
||
if not isinstance(bit, BracketCommand):
|
||
return False
|
||
return bit.command == command
|
||
|
||
def findright(self, contents, index):
|
||
"Find the right bracket starting at the given index, or 0."
|
||
depth = 1
|
||
while index < len(contents):
|
||
if self.checkleft(contents, index):
|
||
depth += 1
|
||
if self.checkright(contents, index):
|
||
depth -= 1
|
||
if depth == 0:
|
||
return index
|
||
index += 1
|
||
return None
|
||
|
||
def findmax(self, contents, leftindex, rightindex):
|
||
"Find the max size of the contents between the two given indices."
|
||
sliced = contents[leftindex:rightindex]
|
||
return max(element.size for element in sliced)
|
||
|
||
def resize(self, command, size):
|
||
"Resize a bracket command to the given size."
|
||
character = command.extracttext()
|
||
alignment = command.command.replace('\\', '')
|
||
bracket = BigBracket(size, character, alignment)
|
||
command.output = ContentsOutput()
|
||
command.contents = bracket.getcontents()
|
||
|
||
|
||
FormulaCommand.types += [OversetFunction, UndersetFunction,
|
||
CombiningFunction, LimitCommand, BracketCommand]
|
||
|
||
FormulaProcessor.processors += [
|
||
LimitsProcessor(), BracketProcessor(),
|
||
]
|
||
|
||
|
||
class ParameterDefinition:
|
||
"The definition of a parameter in a hybrid function."
|
||
"[] parameters are optional, {} parameters are mandatory."
|
||
"Each parameter has a one-character name, like {$1} or {$p}."
|
||
"A parameter that ends in ! like {$p!} is a literal."
|
||
"Example: [$1]{$p!} reads an optional parameter $1 and a literal mandatory parameter p."
|
||
|
||
parambrackets = [('[', ']'), ('{', '}')]
|
||
|
||
def __init__(self):
|
||
self.name = None
|
||
self.literal = False
|
||
self.optional = False
|
||
self.value = None
|
||
self.literalvalue = None
|
||
|
||
def parse(self, pos):
|
||
"Parse a parameter definition: [$0], {$x}, {$1!}..."
|
||
for (opening, closing) in ParameterDefinition.parambrackets:
|
||
if pos.checkskip(opening):
|
||
if opening == '[':
|
||
self.optional = True
|
||
if not pos.checkskip('$'):
|
||
Trace.error('Wrong parameter name, did you mean $' + pos.current() + '?')
|
||
return None
|
||
self.name = pos.skipcurrent()
|
||
if pos.checkskip('!'):
|
||
self.literal = True
|
||
if not pos.checkskip(closing):
|
||
Trace.error('Wrong parameter closing ' + pos.skipcurrent())
|
||
return None
|
||
return self
|
||
Trace.error('Wrong character in parameter template: ' + pos.skipcurrent())
|
||
return None
|
||
|
||
def read(self, pos, function):
|
||
"Read the parameter itself using the definition."
|
||
if self.literal:
|
||
if self.optional:
|
||
self.literalvalue = function.parsesquareliteral(pos)
|
||
else:
|
||
self.literalvalue = function.parseliteral(pos)
|
||
if self.literalvalue:
|
||
self.value = FormulaConstant(self.literalvalue)
|
||
elif self.optional:
|
||
self.value = function.parsesquare(pos)
|
||
else:
|
||
self.value = function.parseparameter(pos)
|
||
|
||
def __str__(self):
|
||
"Return a printable representation."
|
||
result = 'param ' + self.name
|
||
if self.value:
|
||
result += ': ' + str(self.value)
|
||
else:
|
||
result += ' (empty)'
|
||
return result
|
||
|
||
|
||
class ParameterFunction(CommandBit):
|
||
"A function with a variable number of parameters defined in a template."
|
||
"The parameters are defined as a parameter definition."
|
||
|
||
def readparams(self, readtemplate, pos):
|
||
"Read the params according to the template."
|
||
self.params = {}
|
||
for paramdef in self.paramdefs(readtemplate):
|
||
paramdef.read(pos, self)
|
||
self.params['$' + paramdef.name] = paramdef
|
||
|
||
def paramdefs(self, readtemplate):
|
||
"Read each param definition in the template"
|
||
pos = TextPosition(readtemplate)
|
||
while not pos.finished():
|
||
paramdef = ParameterDefinition().parse(pos)
|
||
if paramdef:
|
||
yield paramdef
|
||
|
||
def getparam(self, name):
|
||
"Get a parameter as parsed."
|
||
if name not in self.params:
|
||
return None
|
||
return self.params[name]
|
||
|
||
def getvalue(self, name):
|
||
"Get the value of a parameter."
|
||
return self.getparam(name).value
|
||
|
||
def getliteralvalue(self, name):
|
||
"Get the literal value of a parameter."
|
||
param = self.getparam(name)
|
||
if not param or not param.literalvalue:
|
||
return None
|
||
return param.literalvalue
|
||
|
||
|
||
class HybridFunction(ParameterFunction):
|
||
"""
|
||
A parameter function where the output is also defined using a template.
|
||
The template can use a number of functions; each function has an associated
|
||
tag.
|
||
Example: [f0{$1},span class="fbox"] defines a function f0 which corresponds
|
||
to a span of class fbox, yielding <span class="fbox">$1</span>.
|
||
Literal parameters can be used in tags definitions:
|
||
[f0{$1},span style="color: $p;"]
|
||
yields <span style="color: $p;">$1</span>, where $p is a literal parameter.
|
||
Sizes can be specified in hybridsizes, e.g. adding parameter sizes. By
|
||
default the resulting size is the max of all arguments. Sizes are used
|
||
to generate the right parameters.
|
||
A function followed by a single / is output as a self-closing XHTML tag:
|
||
[f0/,hr]
|
||
will generate <hr/>.
|
||
"""
|
||
|
||
commandmap = FormulaConfig.hybridfunctions
|
||
|
||
def parsebit(self, pos):
|
||
"Parse a function with [] and {} parameters"
|
||
readtemplate = self.translated[0]
|
||
writetemplate = self.translated[1]
|
||
self.readparams(readtemplate, pos)
|
||
self.contents = self.writeparams(writetemplate)
|
||
self.computehybridsize()
|
||
|
||
def writeparams(self, writetemplate):
|
||
"Write all params according to the template"
|
||
return self.writepos(TextPosition(writetemplate))
|
||
|
||
def writepos(self, pos):
|
||
"Write all params as read in the parse position."
|
||
result = []
|
||
while not pos.finished():
|
||
if pos.checkskip('$'):
|
||
param = self.writeparam(pos)
|
||
if param:
|
||
result.append(param)
|
||
elif pos.checkskip('f'):
|
||
function = self.writefunction(pos)
|
||
if function:
|
||
function.type = None
|
||
result.append(function)
|
||
elif pos.checkskip('('):
|
||
result.append(self.writebracket('left', '('))
|
||
elif pos.checkskip(')'):
|
||
result.append(self.writebracket('right', ')'))
|
||
else:
|
||
result.append(FormulaConstant(pos.skipcurrent()))
|
||
return result
|
||
|
||
def writeparam(self, pos):
|
||
"Write a single param of the form $0, $x..."
|
||
name = '$' + pos.skipcurrent()
|
||
if name not in self.params:
|
||
Trace.error('Unknown parameter ' + name)
|
||
return None
|
||
if not self.params[name]:
|
||
return None
|
||
if pos.checkskip('.'):
|
||
self.params[name].value.type = pos.globalpha()
|
||
return self.params[name].value
|
||
|
||
def writefunction(self, pos):
|
||
"Write a single function f0,...,fn."
|
||
tag = self.readtag(pos)
|
||
if not tag:
|
||
return None
|
||
if pos.checkskip('/'):
|
||
# self-closing XHTML tag, such as <hr/>
|
||
return TaggedBit().selfcomplete(tag)
|
||
if not pos.checkskip('{'):
|
||
Trace.error('Function should be defined in {}')
|
||
return None
|
||
pos.pushending('}')
|
||
contents = self.writepos(pos)
|
||
pos.popending()
|
||
if len(contents) == 0:
|
||
return None
|
||
return TaggedBit().complete(contents, tag)
|
||
|
||
def readtag(self, pos):
|
||
"Get the tag corresponding to the given index. Does parameter substitution."
|
||
if not pos.current().isdigit():
|
||
Trace.error('Function should be f0,...,f9: f' + pos.current())
|
||
return None
|
||
index = int(pos.skipcurrent())
|
||
if 2 + index > len(self.translated):
|
||
Trace.error('Function f' + str(index) + ' is not defined')
|
||
return None
|
||
tag = self.translated[2 + index]
|
||
if '$' not in tag:
|
||
return tag
|
||
for variable in self.params:
|
||
if variable in tag:
|
||
param = self.params[variable]
|
||
if not param.literal:
|
||
Trace.error('Parameters in tag ' + tag + ' should be literal: {' + variable + '!}')
|
||
continue
|
||
if param.literalvalue:
|
||
value = param.literalvalue
|
||
else:
|
||
value = ''
|
||
tag = tag.replace(variable, value)
|
||
return tag
|
||
|
||
def writebracket(self, direction, character):
|
||
"Return a new bracket looking at the given direction."
|
||
return self.factory.create(BracketCommand).create(direction, character)
|
||
|
||
def computehybridsize(self):
|
||
"Compute the size of the hybrid function."
|
||
if self.command not in HybridSize.configsizes:
|
||
self.computesize()
|
||
return
|
||
self.size = HybridSize().getsize(self)
|
||
# set the size in all elements at first level
|
||
for element in self.contents:
|
||
element.size = self.size
|
||
|
||
|
||
class HybridSize:
|
||
"The size associated with a hybrid function."
|
||
|
||
configsizes = FormulaConfig.hybridsizes
|
||
|
||
def getsize(self, function):
|
||
"Read the size for a function and parse it."
|
||
sizestring = self.configsizes[function.command]
|
||
for name in function.params:
|
||
if name in sizestring:
|
||
size = function.params[name].value.computesize()
|
||
sizestring = sizestring.replace(name, str(size))
|
||
if '$' in sizestring:
|
||
Trace.error('Unconverted variable in hybrid size: ' + sizestring)
|
||
return 1
|
||
return eval(sizestring)
|
||
|
||
|
||
FormulaCommand.types += [HybridFunction]
|
||
|
||
|
||
def math2html(formula):
|
||
"Convert some TeX math to HTML."
|
||
factory = FormulaFactory()
|
||
whole = factory.parseformula(formula)
|
||
FormulaProcessor().process(whole)
|
||
whole.process()
|
||
return ''.join(whole.gethtml())
|
||
|
||
|
||
def main():
|
||
"Main function, called if invoked from the command line"
|
||
args = sys.argv
|
||
Options().parseoptions(args)
|
||
if len(args) != 1:
|
||
Trace.error('Usage: math2html.py escaped_string')
|
||
exit()
|
||
result = math2html(args[0])
|
||
Trace.message(result)
|
||
|
||
|
||
if __name__ == '__main__':
|
||
main()
|