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lyx_mirror/lib/lyx2lyx/LyX.py
Uwe Stöhr 6c6cf5e071 use https:// in the first line of .lyx files 
- also support to detect https via tex2lyx
2017-12-17 02:24:26 +01:00

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# This file is part of lyx2lyx
# -*- coding: utf-8 -*-
# Copyright (C) 2002-2015 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
import io
import codecs
try:
import lyx2lyx_version
version__ = lyx2lyx_version.version
except: # we are running from build directory so assume the last version
version__ = '2.3'
default_debug__ = 2
# Provide support for both python 2 and 3
PY2 = sys.version_info[0] == 2
# End of code to support for both python 2 and 3
####################################################################
# 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)),
# Note that range(i,j) is up to j *excluded*.
("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" , 5)),
("2_2", list(range(475,509)), minor_versions("2.2" , 0)),
("2_3", (), minor_versions("2.3" , 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 trim_eol_binary(line):
" Remove end of line char(s)."
if line[-1] != 10 and line[-1] != 13:
# May happen for the last line of a document
return line
if line[-2:-1] == 13:
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 = u'', output = u'', error = u'',
debug = default_debug__, try_hard = 0, cjk_encoding = u'',
final_version = u'', systemlyxdir = u'', language = u'english',
encoding = u'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_input(input)
self.output = 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
self.systemlyxdir = systemlyxdir
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."""
# First pass: Read header to determine file encoding
# If we are running under python3 then all strings are binary in this
# pass. In some cases we need to convert binary to unicode in order to
# use our parser tools. Since we do not know the true encoding yet we
# use latin1. This works since a) the parts we are interested in are
# pure ASCII (subset of latin1) and b) in contrast to pure ascii or
# utf8, one can decode any 8byte string using latin1.
first_line = True
while True:
line = self.input.readline()
if not line:
# eof found before end of header
self.error("Invalid LyX file: Missing body.")
if first_line:
# Remove UTF8 BOM marker if present
if line.startswith(codecs.BOM_UTF8):
line = line[len(codecs.BOM_UTF8):]
first_line = False
if PY2:
line = trim_eol(line)
decoded = line
else:
line = trim_eol_binary(line)
decoded = line.decode('latin1')
if check_token(decoded, '\\begin_preamble'):
while True:
line = self.input.readline()
if not line:
# eof found before end of header
self.error("Invalid LyX file: Missing body.")
if PY2:
line = trim_eol(line)
decoded = line
else:
line = trim_eol_binary(line)
decoded = line.decode('latin1')
if check_token(decoded, '\\end_preamble'):
break
if decoded.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(decoded, '\\end_preamble'):
continue
line = line.rstrip()
if not line:
continue
if decoded.split()[0] in ("\\layout", "\\begin_layout",
"\\begin_body", "\\begin_deeper"):
self.body.append(line)
break
self.header.append(line)
if PY2:
i = find_token(self.header, '\\textclass', 0)
else:
i = find_token(self.header, b'\\textclass', 0)
if i == -1:
self.warning("Malformed LyX file: Missing '\\textclass'.")
if PY2:
i = find_token(self.header, '\\lyxformat', 0) + 1
self.header[i:i] = ['\\textclass article']
else:
i = find_token(self.header, b'\\lyxformat', 0) + 1
self.header[i:i] = [b'\\textclass article']
if PY2:
self.textclass = get_value(self.header, "\\textclass", 0,
default = "")
self.language = get_value(self.header, "\\language", 0,
default = "english")
self.inputencoding = get_value(self.header, "\\inputencoding", 0,
default = "auto")
else:
self.textclass = get_value(self.header, b"\\textclass", 0,
default = b"")
self.language = get_value(self.header, b"\\language", 0,
default = b"english").decode('ascii')
self.inputencoding = get_value(self.header, b"\\inputencoding", 0,
default = b"auto").decode('ascii')
self.format = self.read_format()
self.initial_format = self.format
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)
self.backend = get_backend(self.textclass)
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)
for i in range(len(self.body)):
self.body[i] = self.body[i].decode(self.encoding)
# Read document body
while True:
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.choose_output(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+u"\n")
def choose_output(self, output):
"""Choose output streams dealing transparently with
compressed files."""
# This is a bit complicated, because we need to be compatible both with
# python 2 and python 3. Therefore we handle the encoding here and not
# when writing individual lines and may need up to 3 layered file like
# interfaces.
if self.compressed:
if output:
outputfileobj = open(output, 'wb')
else:
# We cannot not use stdout directly since it needs text, not bytes in python 3
outputfileobj = os.fdopen(sys.stdout.fileno(), 'wb')
# We cannot not use gzip.open() since it is not supported by python 2
zipbuffer = gzip.GzipFile(mode='wb', fileobj=outputfileobj)
# We do not want to use different newlines on different OSes inside zipped files
self.output = io.TextIOWrapper(zipbuffer, encoding=self.encoding, newline='\n')
else:
if output:
self.output = io.open(output, 'w', encoding=self.encoding)
else:
self.output = io.open(sys.stdout.fileno(), 'w', encoding=self.encoding)
def choose_input(self, input):
"""Choose input stream, dealing transparently with
compressed files."""
# Since we do not know the encoding yet we need to read the input as
# bytes in binary mode, and convert later to unicode.
if input and input != u'-':
self.dir = os.path.dirname(os.path.abspath(input))
try:
gzip.open(input).readline()
self.input = gzip.open(input)
self.compressed = True
except:
self.input = open(input, 'rb')
self.compressed = False
else:
self.dir = u''
self.input = os.fdopen(sys.stdin.fileno(), 'rb')
self.compressed = False
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 https://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:
if PY2:
result = fileformat.match(line)
else:
result = fileformat.match(line.decode('ascii'))
if result:
return self.lyxformat(result.group(1))
else:
self.error("Invalid LyX File: Missing format.")
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."
if self.format == self.end_format:
self.warning("No conversion needed: Target format %s "
"same as current format!" % self.format, default_debug__)
return
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"""
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.initial_format) < (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 True:
# 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 = u'', output = u'', error = u'',
debug = default_debug__, try_hard = 0, cjk_encoding = u'',
final_version = u'', systemlyxdir = u''):
LyX_base.__init__(self, end_format, input, output, error,
debug, try_hard, cjk_encoding, final_version,
systemlyxdir)
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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