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lyx_mirror/lib/lyx2lyx/LyX.py
Georg Baum 39329935f3 Parse \multicolumn in math (bug 396) 
The math parser could not handle multicolumn grids. This is a problem because
there is no true ERT in math (everything is parsed).
Now multicolumn cells are parsed correctly. The display is also somewhat OK,
but apart from that any multicolumn related UI is missing. Since the file
format change is now done the UI can be added at any later point. The most
important part of bug 396 is now fixed: tex2lyx does not create invalid .lyx
files anymore for formulas containing \multicolumn.

I updated the tex2lyx test cases that produce correct output. tex2lyx does
still produce invalid output for the test cases which are not updated because
of the previous format change.
2015-05-17 13:43:37 +02:00

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# This file is part of lyx2lyx
# -*- coding: utf-8 -*-
# Copyright (C) 2002-2011 The LyX Team
# Copyright (C) 2002-2004 Dekel Tsur <dekel@lyx.org>
# Copyright (C) 2002-2006 José Matos <jamatos@lyx.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
" The LyX module has all the rules related with different lyx file formats."
from parser_tools import get_value, check_token, find_token, \
find_tokens, find_end_of
import os.path
import gzip
import locale
import sys
import re
import time
try:
import lyx2lyx_version
version__ = lyx2lyx_version.version
except: # we are running from build directory so assume the last version
version__ = '2.2'
default_debug__ = 2
####################################################################
# Private helper functions
def find_end_of_inset(lines, i):
" Find beginning of inset, where lines[i] is included."
return find_end_of(lines, i, "\\begin_inset", "\\end_inset")
def minor_versions(major, last_minor_version):
""" Generate minor versions, using major as prefix and minor
versions from 0 until last_minor_version, plus the generic version.
Example:
minor_versions("1.2", 4) ->
[ "1.2", "1.2.0", "1.2.1", "1.2.2", "1.2.3"]
"""
return [major] + [major + ".%d" % i for i in range(last_minor_version + 1)]
# End of helper functions
####################################################################
# Regular expressions used
format_re = re.compile(r"(\d)[\.,]?(\d\d)")
fileformat = re.compile(r"\\lyxformat\s*(\S*)")
original_version = re.compile(r".*?LyX ([\d.]*)")
original_tex2lyx_version = re.compile(r".*?tex2lyx ([\d.]*)")
##
# file format information:
# file, supported formats, stable release versions
format_relation = [("0_06", [200], minor_versions("0.6" , 4)),
("0_08", [210], minor_versions("0.8" , 6) + ["0.7"]),
("0_10", [210], minor_versions("0.10", 7) + ["0.9"]),
("0_12", [215], minor_versions("0.12", 1) + ["0.11"]),
("1_0", [215], minor_versions("1.0" , 4)),
("1_1", [215], minor_versions("1.1" , 4)),
("1_1_5", [216], ["1.1", "1.1.5","1.1.5.1","1.1.5.2"]),
("1_1_6_0", [217], ["1.1", "1.1.6","1.1.6.1","1.1.6.2"]),
("1_1_6_3", [218], ["1.1", "1.1.6.3","1.1.6.4"]),
("1_2", [220], minor_versions("1.2" , 4)),
("1_3", [221], minor_versions("1.3" , 7)),
("1_4", list(range(222,246)), minor_versions("1.4" , 5)),
("1_5", list(range(246,277)), minor_versions("1.5" , 7)),
("1_6", list(range(277,346)), minor_versions("1.6" , 10)),
("2_0", list(range(346,414)), minor_versions("2.0" , 8)),
("2_1", list(range(414,475)), minor_versions("2.1" , 0)),
("2_2", list(range(475,494)), minor_versions("2.2" , 0))
]
####################################################################
# This is useful just for development versions #
# if the list of supported formats is empty get it from last step #
if not format_relation[-1][1]:
step, mode = format_relation[-1][0], "convert"
convert = getattr(__import__("lyx_" + step), mode)
format_relation[-1] = (step,
[conv[0] for conv in convert],
format_relation[-1][2])
# #
####################################################################
def formats_list():
" Returns a list with supported file formats."
formats = []
for version in format_relation:
for format in version[1]:
if format not in formats:
formats.append(format)
return formats
def format_info():
" Returns a list with supported file formats."
out = """Major version:
minor versions
formats
"""
for version in format_relation:
major = str(version[2][0])
versions = str(version[2][1:])
if len(version[1]) == 1:
formats = str(version[1][0])
else:
formats = "%s - %s" % (version[1][-1], version[1][0])
out += "%s\n\t%s\n\t%s\n\n" % (major, versions, formats)
return out + '\n'
def get_end_format():
" Returns the more recent file format available."
# this check will fail only when we have a new version
# and there is no format change yet.
if format_relation[-1][1]:
return format_relation[-1][1][-1]
return format_relation[-2][1][-1]
def get_backend(textclass):
" For _textclass_ returns its backend."
if textclass == "linuxdoc" or textclass == "manpage":
return "linuxdoc"
if textclass.startswith("docbook") or textclass.startswith("agu-"):
return "docbook"
return "latex"
def trim_eol(line):
" Remove end of line char(s)."
if line[-1] != '\n' and line[-1] != '\r':
# May happen for the last line of a document
return line
if line[-2:-1] == '\r':
return line[:-2]
else:
return line[:-1]
def get_encoding(language, inputencoding, format, cjk_encoding):
" Returns enconding of the lyx file"
if format > 248:
return "utf8"
# CJK-LyX encodes files using the current locale encoding.
# This means that files created by CJK-LyX can only be converted using
# the correct locale settings unless the encoding is given as commandline
# argument.
if cjk_encoding == 'auto':
return locale.getpreferredencoding()
elif cjk_encoding:
return cjk_encoding
from lyx2lyx_lang import lang
if inputencoding == "auto" or inputencoding == "default":
return lang[language][3]
if inputencoding == "":
return "latin1"
if inputencoding == "utf8x":
return "utf8"
# python does not know the alias latin9
if inputencoding == "latin9":
return "iso-8859-15"
return inputencoding
##
# Class
#
class LyX_base:
"""This class carries all the information of the LyX file."""
def __init__(self, end_format = 0, input = "", output = "", error = "",
debug = default_debug__, try_hard = 0, cjk_encoding = '',
final_version = "", language = "english", encoding = "auto"):
"""Arguments:
end_format: final format that the file should be converted. (integer)
input: the name of the input source, if empty resort to standard input.
output: the name of the output file, if empty use the standard output.
error: the name of the error file, if empty use the standard error.
debug: debug level, O means no debug, as its value increases be more verbose.
"""
self.choose_io(input, output)
if error:
self.err = open(error, "w")
else:
self.err = sys.stderr
self.debug = debug
self.try_hard = try_hard
self.cjk_encoding = cjk_encoding
if end_format:
self.end_format = self.lyxformat(end_format)
# In case the target version and format are both specified
# verify that they are compatible. If not send a warning
# and ignore the version.
if final_version:
message = "Incompatible version %s for specified format %d" % (
final_version, self.end_format)
for version in format_relation:
if self.end_format in version[1]:
if final_version not in version[2]:
self.warning(message)
final_version = ""
elif final_version:
for version in format_relation:
if final_version in version[2]:
# set the last format for that version
self.end_format = version[1][-1]
break
else:
final_version = ""
else:
self.end_format = get_end_format()
if not final_version:
for step in format_relation:
if self.end_format in step[1]:
final_version = step[2][1]
self.final_version = final_version
self.warning("Final version: %s" % self.final_version, 10)
self.warning("Final format: %d" % self.end_format, 10)
self.backend = "latex"
self.textclass = "article"
# This is a hack: We use '' since we don't know the default
# layout of the text class. LyX will parse it as default layout.
# FIXME: Read the layout file and use the real default layout
self.default_layout = ''
self.header = []
self.preamble = []
self.body = []
self.status = 0
self.encoding = encoding
self.language = language
def warning(self, message, debug_level= default_debug__):
""" Emits warning to self.error, if the debug_level is less
than the self.debug."""
if debug_level <= self.debug:
self.err.write("Warning: " + message + "\n")
def error(self, message):
" Emits a warning and exits if not in try_hard mode."
self.warning(message)
if not self.try_hard:
self.warning("Quitting.")
sys.exit(1)
self.status = 2
def read(self):
"""Reads a file into the self.header and
self.body parts, from self.input."""
while True:
line = self.input.readline()
if not line:
self.error("Invalid LyX file.")
line = trim_eol(line)
if check_token(line, '\\begin_preamble'):
while 1:
line = self.input.readline()
if not line:
self.error("Invalid LyX file.")
line = trim_eol(line)
if check_token(line, '\\end_preamble'):
break
if line.split()[:0] in ("\\layout",
"\\begin_layout", "\\begin_body"):
self.warning("Malformed LyX file:"
"Missing '\\end_preamble'."
"\nAdding it now and hoping"
"for the best.")
self.preamble.append(line)
if check_token(line, '\\end_preamble'):
continue
line = line.strip()
if not line:
continue
if line.split()[0] in ("\\layout", "\\begin_layout",
"\\begin_body", "\\begin_deeper"):
self.body.append(line)
break
self.header.append(line)
i = find_token(self.header, '\\textclass', 0)
if i == -1:
self.warning("Malformed LyX file: Missing '\\textclass'.")
i = find_token(self.header, '\\lyxformat', 0) + 1
self.header[i:i] = ['\\textclass article']
self.textclass = get_value(self.header, "\\textclass", 0)
self.backend = get_backend(self.textclass)
self.format = self.read_format()
self.language = get_value(self.header, "\\language", 0,
default = "english")
self.inputencoding = get_value(self.header, "\\inputencoding",
0, default = "auto")
self.encoding = get_encoding(self.language,
self.inputencoding, self.format,
self.cjk_encoding)
self.initial_version = self.read_version()
# Second pass over header and preamble, now we know the file encoding
# Do not forget the textclass (Debian bug #700828)
self.textclass = self.textclass.decode(self.encoding)
for i in range(len(self.header)):
self.header[i] = self.header[i].decode(self.encoding)
for i in range(len(self.preamble)):
self.preamble[i] = self.preamble[i].decode(self.encoding)
# Read document body
while 1:
line = self.input.readline().decode(self.encoding)
if not line:
break
self.body.append(trim_eol(line))
def write(self):
" Writes the LyX file to self.output."
self.set_version()
self.set_format()
self.set_textclass()
if self.encoding == "auto":
self.encoding = get_encoding(self.language, self.encoding,
self.format, self.cjk_encoding)
if self.preamble:
i = find_token(self.header, '\\textclass', 0) + 1
preamble = ['\\begin_preamble'] + self.preamble + ['\\end_preamble']
header = self.header[:i] + preamble + self.header[i:]
else:
header = self.header
for line in header + [''] + self.body:
self.output.write(line.encode(self.encoding)+"\n")
def choose_io(self, input, output):
"""Choose input and output streams, dealing transparently with
compressed files."""
if output:
self.output = open(output, "wb")
else:
self.output = sys.stdout
if input and input != '-':
self.dir = os.path.dirname(os.path.abspath(input))
try:
gzip.open(input).readline()
self.input = gzip.open(input)
self.output = gzip.GzipFile(mode="wb", fileobj=self.output)
except:
self.input = open(input)
else:
self.dir = ''
self.input = sys.stdin
def lyxformat(self, format):
" Returns the file format representation, an integer."
result = format_re.match(format)
if result:
format = int(result.group(1) + result.group(2))
elif format == '2':
format = 200
else:
self.error(str(format) + ": " + "Invalid LyX file.")
if format in formats_list():
return format
self.error(str(format) + ": " + "Format not supported.")
return None
def read_version(self):
""" Searchs for clues of the LyX version used to write the
file, returns the most likely value, or None otherwise."""
for line in self.header:
if line[0] != "#":
return None
line = line.replace("fix",".")
# need to test original_tex2lyx_version first because tex2lyx
# writes "#LyX file created by tex2lyx 2.2"
result = original_tex2lyx_version.match(line)
if not result:
result = original_version.match(line)
if result:
# Special know cases: reLyX and KLyX
if line.find("reLyX") != -1 or line.find("KLyX") != -1:
return "0.12"
if result:
res = result.group(1)
if not res:
self.warning(line)
#self.warning("Version %s" % result.group(1))
return res
self.warning(str(self.header[:2]))
return None
def set_version(self):
" Set the header with the version used."
initial_comment = " ".join(["#LyX %s created this file." % version__,
"For more info see http://www.lyx.org/"])
# Simple heuristic to determine the comment that always starts
# a lyx file
if self.header[0].startswith("#"):
self.header[0] = initial_comment
else:
self.header.insert(0, initial_comment)
# Old lyx files had a two lines comment header:
# 1) the first line had the user who had created it
# 2) the second line had the lyx version used
# later we decided that 1) was a privacy risk for no gain
# here we remove the second line effectively erasing 1)
if self.header[1][0] == '#':
del self.header[1]
def read_format(self):
" Read from the header the fileformat of the present LyX file."
for line in self.header:
result = fileformat.match(line)
if result:
return self.lyxformat(result.group(1))
else:
self.error("Invalid LyX File.")
return None
def set_format(self):
" Set the file format of the file, in the header."
if self.format <= 217:
format = str(float(self.format)/100)
else:
format = str(self.format)
i = find_token(self.header, "\\lyxformat", 0)
self.header[i] = "\\lyxformat %s" % format
def set_textclass(self):
i = find_token(self.header, "\\textclass", 0)
self.header[i] = "\\textclass %s" % self.textclass
#Note that the module will be added at the END of the extant ones
def add_module(self, module):
i = find_token(self.header, "\\begin_modules", 0)
if i == -1:
#No modules yet included
i = find_token(self.header, "\\textclass", 0)
if i == -1:
self.warning("Malformed LyX document: No \\textclass!!")
return
modinfo = ["\\begin_modules", module, "\\end_modules"]
self.header[i + 1: i + 1] = modinfo
return
j = find_token(self.header, "\\end_modules", i)
if j == -1:
self.warning("(add_module)Malformed LyX document: No \\end_modules.")
return
k = find_token(self.header, module, i)
if k != -1 and k < j:
return
self.header.insert(j, module)
def get_module_list(self):
i = find_token(self.header, "\\begin_modules", 0)
if (i == -1):
return []
j = find_token(self.header, "\\end_modules", i)
return self.header[i + 1 : j]
def set_module_list(self, mlist):
modbegin = find_token(self.header, "\\begin_modules", 0)
newmodlist = ['\\begin_modules'] + mlist + ['\\end_modules']
if (modbegin == -1):
#No modules yet included
tclass = find_token(self.header, "\\textclass", 0)
if tclass == -1:
self.warning("Malformed LyX document: No \\textclass!!")
return
modbegin = tclass + 1
self.header[modbegin:modbegin] = newmodlist
return
modend = find_token(self.header, "\\end_modules", modbegin)
if modend == -1:
self.warning("(set_module_list)Malformed LyX document: No \\end_modules.")
return
newmodlist = ['\\begin_modules'] + mlist + ['\\end_modules']
self.header[modbegin:modend + 1] = newmodlist
def set_parameter(self, param, value):
" Set the value of the header parameter."
i = find_token(self.header, '\\' + param, 0)
if i == -1:
self.warning('Parameter not found in the header: %s' % param, 3)
return
self.header[i] = '\\%s %s' % (param, str(value))
def is_default_layout(self, layout):
" Check whether a layout is the default layout of this class."
# FIXME: Check against the real text class default layout
if layout == 'Standard' or layout == self.default_layout:
return 1
return 0
def convert(self):
"Convert from current (self.format) to self.end_format."
mode, conversion_chain = self.chain()
self.warning("conversion chain: " + str(conversion_chain), 3)
for step in conversion_chain:
steps = getattr(__import__("lyx_" + step), mode)
self.warning("Convertion step: %s - %s" % (step, mode),
default_debug__ + 1)
if not steps:
self.error("The conversion to an older "
"format (%s) is not implemented." % self.format)
multi_conv = len(steps) != 1
for version, table in steps:
if multi_conv and \
(self.format >= version and mode == "convert") or\
(self.format <= version and mode == "revert"):
continue
for conv in table:
init_t = time.time()
try:
conv(self)
except:
self.warning("An error ocurred in %s, %s" %
(version, str(conv)),
default_debug__)
if not self.try_hard:
raise
self.status = 2
else:
self.warning("%lf: Elapsed time on %s" %
(time.time() - init_t,
str(conv)), default_debug__ +
1)
self.format = version
if self.end_format == self.format:
return
def chain(self):
""" This is where all the decisions related with the
conversion are taken. It returns a list of modules needed to
convert the LyX file from self.format to self.end_format"""
self.start = self.format
format = self.format
correct_version = 0
for rel in format_relation:
if self.initial_version in rel[2]:
if format in rel[1]:
initial_step = rel[0]
correct_version = 1
break
if not correct_version:
if format <= 215:
self.warning("Version does not match file format, "
"discarding it. (Version %s, format %d)" %
(self.initial_version, self.format))
for rel in format_relation:
if format in rel[1]:
initial_step = rel[0]
break
else:
# This should not happen, really.
self.error("Format not supported.")
# Find the final step
for rel in format_relation:
if self.end_format in rel[1]:
final_step = rel[0]
break
else:
self.error("Format not supported.")
# Convertion mode, back or forth
steps = []
if (initial_step, self.start) < (final_step, self.end_format):
mode = "convert"
full_steps = []
for step in format_relation:
if initial_step <= step[0] <= final_step and step[2][0] <= self.final_version:
full_steps.append(step)
if full_steps[0][1][-1] == self.format:
full_steps = full_steps[1:]
for step in full_steps:
steps.append(step[0])
else:
mode = "revert"
relation_format = format_relation[:]
relation_format.reverse()
last_step = None
for step in relation_format:
if final_step <= step[0] <= initial_step:
steps.append(step[0])
last_step = step
if last_step[1][-1] == self.end_format:
steps.pop()
self.warning("Convertion mode: %s\tsteps%s" %(mode, steps), 10)
return mode, steps
# Part of an unfinished attempt to make lyx2lyx gave a more
# structured view of the document.
# def get_toc(self, depth = 4):
# " Returns the TOC of this LyX document."
# paragraphs_filter = {'Title' : 0,'Chapter' : 1, 'Section' : 2,
# 'Subsection' : 3, 'Subsubsection': 4}
# allowed_insets = ['Quotes']
# allowed_parameters = ('\\paragraph_spacing', '\\noindent',
# '\\align', '\\labelwidthstring',
# "\\start_of_appendix", "\\leftindent")
# sections = []
# for section in paragraphs_filter.keys():
# sections.append('\\begin_layout %s' % section)
# toc_par = []
# i = 0
# while 1:
# i = find_tokens(self.body, sections, i)
# if i == -1:
# break
# j = find_end_of(self.body, i + 1, '\\begin_layout', '\\end_layout')
# if j == -1:
# self.warning('Incomplete file.', 0)
# break
# section = self.body[i].split()[1]
# if section[-1] == '*':
# section = section[:-1]
# par = []
# k = i + 1
# # skip paragraph parameters
# while not self.body[k].strip() or self.body[k].split()[0] \
# in allowed_parameters:
# k += 1
# while k < j:
# if check_token(self.body[k], '\\begin_inset'):
# inset = self.body[k].split()[1]
# end = find_end_of_inset(self.body, k)
# if end == -1 or end > j:
# self.warning('Malformed file.', 0)
# if inset in allowed_insets:
# par.extend(self.body[k: end+1])
# k = end + 1
# else:
# par.append(self.body[k])
# k += 1
# # trim empty lines in the end.
# while par and par[-1].strip() == '':
# par.pop()
# toc_par.append(Paragraph(section, par))
# i = j + 1
# return toc_par
class File(LyX_base):
" This class reads existing LyX files."
def __init__(self, end_format = 0, input = "", output = "", error = "",
debug = default_debug__, try_hard = 0, cjk_encoding = '',
final_version = ''):
LyX_base.__init__(self, end_format, input, output, error,
debug, try_hard, cjk_encoding, final_version)
self.read()
# FIXME: header settings are completely outdated, don't use like this
#class NewFile(LyX_base):
# " This class is to create new LyX files."
# def set_header(self, **params):
# # set default values
# self.header.extend([
# "#LyX xxxx created this file."
# "For more info see http://www.lyx.org/",
# "\\lyxformat xxx",
# "\\begin_document",
# "\\begin_header",
# "\\textclass article",
# "\\language english",
# "\\inputencoding auto",
# "\\font_roman default",
# "\\font_sans default",
# "\\font_typewriter default",
# "\\font_default_family default",
# "\\font_sc false",
# "\\font_osf false",
# "\\font_sf_scale 100",
# "\\font_tt_scale 100",
# "\\graphics default",
# "\\paperfontsize default",
# "\\papersize default",
# "\\use_geometry false",
# "\\use_amsmath 1",
# "\\cite_engine basic",
# "\\use_bibtopic false",
# "\\use_indices false",
# "\\paperorientation portrait",
# "\\secnumdepth 3",
# "\\tocdepth 3",
# "\\paragraph_separation indent",
# "\\defskip medskip",
# "\\quotes_language english",
# "\\papercolumns 1",
# "\\papersides 1",
# "\\paperpagestyle default",
# "\\tracking_changes false",
# "\\end_header"])
# self.format = get_end_format()
# for param in params:
# self.set_parameter(param, params[param])
# def set_body(self, paragraphs):
# self.body.extend(['\\begin_body',''])
# for par in paragraphs:
# self.body.extend(par.asLines())
# self.body.extend(['','\\end_body', '\\end_document'])
# Part of an unfinished attempt to make lyx2lyx gave a more
# structured view of the document.
#class Paragraph:
# # unfinished implementation, it is missing the Text and Insets
# # representation.
# " This class represents the LyX paragraphs."
# def __init__(self, name, body=[], settings = [], child = []):
# """ Parameters:
# name: paragraph name.
# body: list of lines of body text.
# child: list of paragraphs that descend from this paragraph.
# """
# self.name = name
# self.body = body
# self.settings = settings
# self.child = child
# def asLines(self):
# """ Converts the paragraph to a list of strings, representing
# it in the LyX file."""
# result = ['','\\begin_layout %s' % self.name]
# result.extend(self.settings)
# result.append('')
# result.extend(self.body)
# result.append('\\end_layout')
# if not self.child:
# return result
# result.append('\\begin_deeper')
# for node in self.child:
# result.extend(node.asLines())
# result.append('\\end_deeper')
# return result
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