# This file is part of lyx2lyx
-# Copyright (C) 2002 Dekel Tsur <dekel@lyx.org>, José Matos <jamatos@lyx.org>
+# -*- coding: utf-8 -*-
+# Copyright (C) 2002-2004 Dekel Tsur <dekel@lyx.org>, 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
# 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_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):
+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_token2(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]
+ return ""
+ if len(lines[i].split()) > 1:
+ return lines[i].split()[1]
+ else:
+ return default
+
+
+def del_token(lines, token, start, end):
+ """ del_token(lines, token, start, end) -> int
+
+ Find the lower line in lines where token is the first element and
+ delete that line.
+
+ Returns the number of lines remaining."""
-def del_token(lines, token, i, j):
- k = find_token2(lines, token, i, j)
+ k = find_token_exact(lines, token, start, end)
if k == -1:
- return j
+ return end
else:
- del lines[k]
- return j-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
- i = find_beginning_of_inset(lines, i)
-
-# Finds the paragraph after the paragraph that contains line i.
-def get_next_paragraph(lines, i):
- while 1:
- i = find_tokens(lines, ["\\begin_inset", "\\layout"], i)
- if check_token(lines[i], "\\layout"):
- return i
- i = find_end_of_inset(lines, i)
-
-# Finds the matching \end_inset
-def find_end_of_inset(lines, i):
+ del lines[k]
+ return end - 1
+
+
+def find_beginning_of(lines, i, start_token, end_token):
count = 1
- while 1:
- i = find_tokens(lines, ["\\end_inset", "\\begin_inset"], i+1)
- if check_token(lines[i], "\\begin_inset"):
- count = count+1
- else:
- count = count-1
- if count == 0:
- return i
-
-# Finds the matching \end_inset
-def find_beginning_of_inset(lines, i):
+ 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
+
+
+def find_end_of(lines, i, start_token, end_token):
count = 1
- while 1:
- i = find_tokens_backwards(lines, ["\\end_inset", "\\begin_inset"], i-1)
- if check_token(lines[i], "\\end_inset"):
- count = count+1
- else:
- count = count-1
- if count == 0:
- return i
+ 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 is_nonempty_line(line):
- return line != " "*len(line)
def find_nonempty_line(lines, start, end = 0):
if end == 0:
- end = len(lines)
+ end = len(lines)
for i in xrange(start, end):
- if is_nonempty_line(lines[i]):
- return i
+ if is_nonempty_line(lines[i]):
+ return i
return -1
-
-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"
- else:
- version = str((x-220)/10.0+1.2)
-
- lines[0] = "#LyX %s created this file. For more info see http://www.lyx.org/" % version
- if lines[1][0] == '#':
- del lines[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
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