X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=lib%2Flyx2lyx%2Fparser_tools.py;h=78459d21d9ce4afc59b7f5bee5ac35d700fc1a73;hb=f36359c7f1abd15d0ca86667ff0adfae050832ed;hp=10052a40b947423aa74f6a7e45fefdf7ed9be74b;hpb=ac51eb82838b09144f7492cd84bd0b0152aa08e6;p=lyx.git diff --git a/lib/lyx2lyx/parser_tools.py b/lib/lyx2lyx/parser_tools.py index 10052a40b9..78459d21d9 100644 --- a/lib/lyx2lyx/parser_tools.py +++ b/lib/lyx2lyx/parser_tools.py @@ -1,5 +1,6 @@ # This file is part of lyx2lyx -# Copyright (C) 2002 Dekel Tsur , José Matos +# -*- coding: utf-8 -*- +# Copyright (C) 2002-2004 Dekel Tsur , José Matos # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License @@ -15,109 +16,197 @@ # 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 +" This modules offer several free functions to help parse lines." +# Utilities for one line def check_token(line, token): - if line[:len(token)] == token: - return 1 - return 0 + """ check_token(line, token) -> bool + + Return True if token is present in line and is the first element + else returns False.""" + + return line[:len(token)] == token + + +def is_nonempty_line(line): + """ is_nonempty_line(line) -> bool + + Return False if line is either empty or it has only whitespaces, + else return True.""" + return line != " "*len(line) + + +# Utilities for a list of lines +def find_token(lines, token, start, end = 0, exact = False): + """ find_token(lines, token, start[[, end], exact]) -> int + + Return the lowest line where token is found, and is the first + element, in lines[start, end]. + + Return -1 on failure.""" -# 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) + end = len(lines) m = len(token) for i in xrange(start, end): - if lines[i][:m] == token: - return i + if exact: + x = lines[i].split() + y = token.split() + if len(x) < len(y): + continue + if x[:len(y)] == y: + return i + else: + if lines[i][:m] == token: + return i return -1 -def find_tokens(lines, tokens, start, end = 0): + +def find_token_exact(lines, token, start, end = 0): + return find_token(lines, token, start, end, True) + + +def find_tokens(lines, tokens, start, end = 0, exact = False): + """ find_tokens(lines, tokens, start[[, end], exact]) -> int + + Return the lowest line where one token in tokens is found, and is + the first element, in lines[start, end]. + + Return -1 on failure.""" if end == 0: - end = len(lines) + end = len(lines) + for i in xrange(start, end): - line = lines[i] - for token in tokens: - if line[:len(token)] == token: - return i + for token in tokens: + if exact: + x = lines[i].split() + y = token.split() + if len(x) < len(y): + continue + if x[:len(y)] == y: + return i + else: + if lines[i][:len(token)] == token: + return i return -1 + +def find_tokens_exact(lines, tokens, start, end = 0): + return find_tokens(lines, tokens, start, end, True) + + def find_re(lines, rexp, start, end = 0): + """ find_token_re(lines, rexp, start[, end]) -> int + + Return the lowest line where rexp, a regular expression, is found + in lines[start, end]. + + Return -1 on failure.""" + if end == 0: - end = len(lines) + end = len(lines) for i in xrange(start, end): - if rexp.match(lines[i]): - return i + if rexp.match(lines[i]): + return i return -1 + def find_token_backwards(lines, token, start): + """ find_token_backwards(lines, token, start) -> int + + Return the highest line where token is found, and is the first + element, in lines[start, end]. + + Return -1 on failure.""" m = len(token) for i in xrange(start, -1, -1): - line = lines[i] - if line[:m] == token: - return i + line = lines[i] + if line[:m] == token: + return i return -1 + def find_tokens_backwards(lines, tokens, start): + """ find_tokens_backwards(lines, token, start) -> int + + Return the highest line where token is found, and is the first + element, in lines[end, start]. + + Return -1 on failure.""" for i in xrange(start, -1, -1): - line = lines[i] - for token in tokens: - if line[:len(token)] == token: - return i + 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_token(lines, token, start, end) + +def get_value(lines, token, start, end = 0, default = ""): + """ get_value(lines, token, start[[, end], default]) -> list of strings + + Return tokens after token for the first line, in lines, where + token is the first element.""" + + i = find_token_exact(lines, token, start, end) if i == -1: - return "" - return string.split(lines[i])[1] - -# Finds the paragraph that contains line i. -def get_paragraph(lines, i): - while 1: - i = find_tokens_backwards(lines, ["\\end_inset", "\\layout"], i) - if check_token(lines[i], "\\layout"): - return i - count = 1 - while count > 0: - i = find_tokens_backwards(lines, ["\\end_inset", "\\begin_inset"], i) - if check_token(lines[i], "\\end_inset"): - count = count+1 - else: - count = count-1 - i = i-1 + return "" + if len(lines[i].split()) > 1: + return lines[i].split()[1] + else: + return default -def is_nonempty_line(line): - line = line[:-1] - return line != " "*len(line) +def del_token(lines, token, start, end): + """ del_token(lines, token, start, end) -> int -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 + Find the lower line in lines where token is the first element and + delete that line. + Returns the number of lines remaining.""" -def set_comment(lines, number): - x = int(number) - if x < 216: - # It is not worth the trouble to handle this case - return - elif x < 220: - version = "1.1" + k = find_token_exact(lines, token, start, end) + if k == -1: + return end else: - version = "1.2" + del lines[k] + return end - 1 + + +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 i == -1: + return -1 + if check_token(lines[i], end_token): + count = count+1 + else: + count = count-1 + if count == 0: + return i + return -1 + - lines[0] = "#LyX %s created this file. For more info see http://www.lyx.org/" % version - if lines[1][0] == '#': - del lines[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 i == -1: + return -1 + if check_token(lines[i], start_token): + count = count+1 + else: + count = count-1 + if count == 0: + return i + return -1 -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 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