lyx_mirror/lib/lyx2lyx/LyX.py

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# This file is part of lyx2lyx
# -*- coding: iso-8859-1 -*-
# Copyright (C) 2002-2004 Dekel Tsur <dekel@lyx.org>, Jos<6F> 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
from parser_tools import get_value, check_token, find_token
import os.path
import gzip
import sys
import re
import string
##
# file format version
#
version = "1.4.0cvs"
default_debug_level = 2
format_re = re.compile(r"(\d)[\.,]?(\d\d)")
fileformat = re.compile(r"\\lyxformat\s*(\S*)")
original_version = re.compile(r"\#LyX (\S*)")
format_relation = [("0_10", [210], ["0.10.7","0.10"]),
("0_12", [215], ["0.12","0.12.1","0.12"]),
("1_0_0", [215], ["1.0.0","1.0"]),
("1_0_1", [215], ["1.0.1","1.0.2","1.0.3","1.0.4", "1.1.2","1.1"]),
("1_1_4", [215], ["1.1.4","1.1"]),
("1_1_5", [216], ["1.1.5","1.1.5fix1","1.1.5fix2","1.1"]),
("1_1_6", [217], ["1.1.6","1.1.6fix1","1.1.6fix2","1.1"]),
("1_1_6fix3", [218], ["1.1.6fix3","1.1.6fix4","1.1"]),
("1_2", [220], ["1.2.0","1.2.1","1.2.3","1.2.4","1.2"]),
("1_3", [221], ["1.3.0","1.3.1","1.3.2","1.3.3","1.3.4","1.3.5","1.3"]),
("1_4", range(223,238), ["1.4.0cvs","1.4"])]
def formats_list():
formats = []
for version in format_relation:
for format in version[1]:
if format not in formats:
formats.append(format)
return formats
def get_end_format():
return format_relation[-1][1][-1]
def get_backend(textclass):
if textclass == "linuxdoc" or textclass == "manpage":
return "linuxdoc"
if textclass[:7] == "docbook":
return "docbook"
return "latex"
##
# Class
#
class FileInfo:
"""This class carries all the information of the LyX file."""
def __init__(self, end_format = 0, input = "", output = "", error = "", debug = default_debug_level):
if input and input != '-':
self.input = self.open(input)
else:
self.input = sys.stdin
if output:
self.output = open(output, "w")
else:
self.output = sys.stdout
if error:
self.err = open(error, "w")
else:
self.err = sys.stderr
self.debug = debug
if end_format:
self.end_format = self.lyxformat(end_format)
else:
self.end_format = get_end_format()
self.backend = "latex"
self.textclass = "article"
self.header = []
self.body = []
self.read()
def warning(self, message, debug_level= default_debug_level):
if debug_level <= self.debug:
self.err.write(message + "\n")
def error(self, message):
self.warning(message)
self.warning("Quiting.")
sys.exit(1)
def read(self):
"""Reads a file into the self.header and self.body parts"""
preamble = 0
while 1:
line = self.input.readline()
if not line:
self.error("Invalid LyX file.")
line = line[:-1]
# remove '\r' from line's end, if present
if line[-1:] == '\r':
line = line[:-1]
if check_token(line, '\\begin_preamble'):
preamble = 1
if check_token(line, '\\end_preamble'):
preamble = 0
if not preamble:
line = string.strip(line)
if not line and not preamble:
break
self.header.append(line)
while 1:
line = self.input.readline()
if not line:
break
# remove '\r' from line's end, if present
if line[-2:-1] == '\r':
self.body.append(line[:-2])
else:
self.body.append(line[:-1])
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)
if self.language == "":
self.language = "english"
self.initial_version = self.read_version()
def write(self):
self.set_version()
self.set_format()
for line in self.header:
self.output.write(line+"\n")
self.output.write("\n")
for line in self.body:
self.output.write(line+"\n")
def open(self, file):
"""Transparently deals with compressed files."""
self.dir = os.path.dirname(os.path.abspath(file))
try:
gzip.open(file).readline()
self.output = gzip.GzipFile("","wb",6,self.output)
return gzip.open(file)
except:
return open(file)
def lyxformat(self, format):
result = format_re.match(format)
if result:
format = int(result.group(1) + result.group(2))
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):
for line in self.header:
if line[0] != "#":
return None
result = original_version.match(line)
if result:
return result.group(1)
return None
def set_version(self):
self.header[0] = "#LyX %s created this file. For more info see http://www.lyx.org/" % version
if self.header[1][0] == '#':
del self.header[1]
def read_format(self):
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):
if self.format <= 217:
format = str(float(format)/100)
else:
format = str(self.format)
i = find_token(self.header, "\\lyxformat", 0)
self.header[i] = "\\lyxformat %s" % format
def chain(self):
""" This is where all the decisions related with the convertion are taken"""
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.")
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"
first_step = 1
for step in format_relation:
if initial_step <= step[0] <= final_step:
if first_step and len(step[1]) == 1:
first_step = 0
continue
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()
return mode, steps