lyx_mirror/lib/lyx2lyx/parser_tools.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.
import string
import re
def check_token(line, token):
if line[:len(token)] == token:
return 1
return 0
# We need to check that the char after the token is space, but I think
# we can ignore this
def find_token(lines, token, start, end = 0):
if end == 0:
end = len(lines)
m = len(token)
for i in xrange(start, end):
if lines[i][:m] == token:
return i
return -1
def find_token2(lines, token, start, end = 0):
if end == 0:
end = len(lines)
for i in xrange(start, end):
x = string.split(lines[i])
if len(x) > 0 and x[0] == token:
return i
return -1
def find_tokens(lines, tokens, start, end = 0):
if end == 0:
end = len(lines)
for i in xrange(start, end):
line = lines[i]
for token in tokens:
if line[:len(token)] == token:
return i
return -1
def find_re(lines, rexp, start, end = 0):
if end == 0:
end = len(lines)
for i in xrange(start, end):
if rexp.match(lines[i]):
return i
return -1
def find_token_backwards(lines, token, start):
m = len(token)
for i in xrange(start, -1, -1):
line = lines[i]
if line[:m] == token:
return i
return -1
def find_tokens_backwards(lines, tokens, start):
for i in xrange(start, -1, -1):
line = lines[i]
for token in tokens:
if line[:len(token)] == token:
return i
return -1
def get_value(lines, token, start, end = 0):
i = find_token2(lines, token, start, end)
if i == -1:
return ""
if len(string.split(lines[i])) > 1:
return string.split(lines[i])[1]
else:
return ""
def del_token(lines, token, i, j):
k = find_token2(lines, token, i, j)
if k == -1:
return j
else:
del lines[k]
return j-1
# Finds the paragraph that contains line i.
def get_paragraph(lines, i):
while i != -1:
i = find_tokens_backwards(lines, ["\\end_inset", "\\layout"], i)
if i == -1: return -1
if check_token(lines[i], "\\layout"):
return i
i = find_beginning_of_inset(lines, i)
return -1
# Finds the paragraph after the paragraph that contains line i.
def get_next_paragraph(lines, i):
while i != -1:
i = find_tokens(lines, ["\\begin_inset", "\\layout", "\\end_float", "\\the_end"], i)
if not check_token(lines[i], "\\begin_inset"):
return i
i = find_end_of_inset(lines, i)
return -1
def find_end_of(lines, i, start_token, end_token):
count = 1
n = len(lines)
while i < n:
i = find_tokens(lines, [end_token, start_token], i+1)
if check_token(lines[i], start_token):
count = count+1
else:
count = count-1
if count == 0:
return i
return -1
# Finds the matching \end_inset
def find_beginning_of(lines, i, start_token, end_token):
count = 1
while i > 0:
i = find_tokens_backwards(lines, [start_token, end_token], i-1)
if check_token(lines[i], end_token):
count = count+1
else:
count = count-1
if count == 0:
return i
return -1
# Finds the matching \end_inset
def find_end_of_inset(lines, i):
return find_end_of(lines, i, "\\begin_inset", "\\end_inset")
# Finds the matching \end_inset
def find_beginning_of_inset(lines, i):
return find_beginning_of(lines, i, "\\begin_inset", "\\end_inset")
def find_end_of_tabular(lines, i):
return find_end_of(lines, i, "<lyxtabular", "</lyxtabular")
def get_tabular_lines(lines, i):
result = []
i = i+1
j = find_end_of_tabular(lines, i)
if j == -1:
return []
while i <= j:
if check_token(lines[i], "\\begin_inset"):
i = find_end_of_inset(lines, i)+1
else:
result.append(i)
i = i+1
return result
def is_nonempty_line(line):
return line != " "*len(line)
def find_nonempty_line(lines, start, end = 0):
if end == 0:
end = len(lines)
for i in xrange(start, end):
if is_nonempty_line(lines[i]):
return i
return -1
##
# Tools for file reading
#
def read_file(header, body, opt):
"""Reads a file into the header and body parts"""
preamble = 0
while 1:
line = opt.input.readline()
if not line:
opt.error("Invalid LyX file.")
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
header.append(line)
while 1:
line = opt.input.readline()
if not line:
break
body.append(line[:-1])
def write_file(header, body, opt):
for line in header:
opt.output.write(line+"\n")
opt.output.write("\n")
for line in body:
opt.output.write(line+"\n")
##
# lyx version
#
original_version = re.compile(r"\#LyX (\S*)")
def read_version(header):
for line in header:
if line[0] != "#":
return None
result = original_version.match(line)
if result:
return result.group(1)
return None
def set_version(lines, version):
lines[0] = "#LyX %s created this file. For more info see http://www.lyx.org/" % version
if lines[1][0] == '#':
del lines[1]
##
# file format version
#
format_re = re.compile(r"(\d)[\.,]?(\d\d)")
fileformat = re.compile(r"\\lyxformat\s*(\S*)")
lst_ft = [210, 215, 216, 217, 218, 220, 221, 223, 224, 225, 226, 227, 228, 229,
230, 231, 232, 233]
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"]),
("1_4", [223,224,225,226,227,228,229,230,231,232,233], ["1.4.0cvs","1.4"])]
def lyxformat(format, opt):
result = format_re.match(format)
if result:
format = int(result.group(1) + result.group(2))
else:
opt.error(str(format) + ": " + "Invalid LyX file.")
if format in lst_ft:
return format
opt.error(str(format) + ": " + "Format no supported.")
return None
def read_format(header, opt):
for line in header:
result = fileformat.match(line)
if result:
return lyxformat(result.group(1), opt)
else:
opt.error("Invalid LyX File.")
return None
def set_format(lines, number):
if int(number) <= 217:
number = float(number)/100
i = find_token(lines, "\\lyxformat", 0)
lines[i] = "\\lyxformat %s" % number
def get_end_format():
return format_relation[-1:][0][1][-1:][0]
def chain(opt, initial_version):
""" This is where all the decisions related with the convertion are taken"""
format = opt.format
if opt.start:
if opt.start != format:
opt.warning("%s: %s %s" % ("Proposed file format and input file formats do not match:", opt.start, format))
else:
opt.start = format
if not opt.end:
opt.end = get_end_format()
correct_version = 0
for rel in format_relation:
if 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:
opt.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.
opt.error("Format not supported.")
# Find the final step
for rel in format_relation:
if opt.end in rel[1]:
final_step = rel[0]
break
else:
opt.error("Format not supported.")
# Convertion mode, back or forth
steps = []
if (initial_step, opt.start) < (final_step, opt.end):
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] == opt.end:
steps.pop()
return mode, steps