# where the last statement resets the counter to accord with the added
# lines.
def wrap_into_ert(string, src, dst):
- " Wrap a something into an ERT"
+ '''Within string, replace occurrences of src with dst, wrapped into ERT
+ E.g.: wrap_into_ert('sch\"on', "\\", "\\backslash") is:
+ sch<ERT>\\backslash</ERT>"on'''
return string.replace(src, '\n\\begin_inset ERT\nstatus collapsed\n\\begin_layout Standard\n'
+ dst + '\n\\end_layout\n\\end_inset\n')
+def put_cmd_in_ert(string):
+ string = string.replace('\\', "\\backslash\n")
+ string = "\\begin_inset ERT\nstatus collapsed\n\\begin_layout Standard\n" \
+ + string + "\n\\end_layout\n\\end_inset"
+ return string
+
def add_to_preamble(document, text):
""" Add text to the preamble if it is not already there.
Only the first line is checked!"""
# as: \"u.
r = re.compile(r'\\\\(\W)\{(\w)\}')
for line in fp.readlines():
- if line[0] != '#' and line.strip() != "" and line.find("\\") != -1:
+ if line[0] != '#' and line.strip() != "":
line=line.replace(' "',' ') # remove all quotation marks with spaces before
line=line.replace('" ',' ') # remove all quotation marks with spaces after
line=line.replace(r'\"','"') # replace \" by " (for characters with diaeresis)
try:
[ucs4,command,dead] = line.split(None,2)
+ if command[0:1] != "\\":
+ continue
spec_chars.append([command, unichr(eval(ucs4))])
except:
continue
return spec_chars
-def line2lyx(line):
- '''Converts LaTeX commands, such as: \"u, to unicode characters, and
- escapes backslashes, etc, into ERT. line may well be a multi-line
- string when it is returned.
- NOTE: If we want to convert \label{} into an InsetLabel, then this
- is the place to do it.'''
+def extract_argument(line):
+ 'Extracts a LaTeX argument from the start of line. Returns (arg, rest).'
+
+ if not line:
+ return (None, "")
+
+ bracere = re.compile("(\s*)(.*)")
+ n = bracere.match(line)
+ whitespace = n.group(1)
+ stuff = n.group(2)
+ brace = stuff[:1]
+ if brace != "[" and brace != "{":
+ return (None, line)
+
+ # find closing brace
+ remain = stuff[1:]
+ pos = 0
+ num = 1
+ term = "}"
+ if brace == "[":
+ term = "]"
+ skip = False
+ for c in remain:
+ if skip:
+ skip = False
+ elif c == "\\":
+ skip = True
+ elif c == brace:
+ num += 1
+ elif c == term:
+ num -= 1
+ if c == 0:
+ break
+ pos += 1
+ if num != 0:
+ # We never found the matching brace
+ # So, to be on the safe side, let's just return everything
+ # which will then get wrapped as ERT
+ return (line, "")
+ return (line[:pos + 1], line[pos + 1:])
+
+
+def latex2ert(line):
+ '''Converts LaTeX commands into ERT. line may well be a multi-line
+ string when it is returned.'''
if not line:
return line
- line = wrap_into_ert(line, '\\', '\\backslash')
- line = wrap_into_ert(line, '{', '{')
- line = wrap_into_ert(line, '}', '}')
- return line
+
+ retval = ""
+ ## FIXME Escaped \ ??
+ labelre = re.compile(r'(.*?)\\(\\(?:[a-zA-Z]+|.))(.*)')
+
+ m = labelre.match(line)
+ while m != None:
+ retval += m.group(1)
+ cmd = m.group(2)
+ end = m.group(3)
+
+ while True:
+ (arg, rest) = extract_argument(end)
+ if arg == None:
+ break
+ cmd += arg
+ end = rest
+ cmd = put_cmd_in_ert(cmd)
+ retval += "\n" + cmd + "\n"
+ line = end
+ m = labelre.match(line)
+ retval += line
+ return retval
def latex2lyx(data):
converting LaTeX constructs into LyX constructs. Returns a list of
lines, suitable for insertion into document.body.'''
- mathre = re.compile('^(.*?)(\$.*?\$)(.*)')
retval = []
# Convert LaTeX to Unicode
reps = read_unicodesymbols()
+ # Commands of this sort need to be checked to make sure they are
+ # followed by a non-alpha character, lest we replace too much.
+ hardone = re.compile(r'^\\\\[a-zA-Z]+$')
+
for rep in reps:
- try:
+ if hardone.match(rep[0]):
+ pos = 0
+ while True:
+ pos = data.find(rep[0], pos)
+ if pos == -1:
+ break
+ nextpos = pos + len(rep[0])
+ nextchar = data[nextpos - 1 : nextpos]
+ if nextchar.isalpha():
+ # not the end of that command
+ pos = nextpos
+ continue
+ data = data[:pos] + rep[1] + data[nextpos:]
+ pos = nextpos
+ else:
data = data.replace(rep[0], rep[1])
- except:
- # There seems to be a character in the unicodesymbols file
- # that causes problems, namely, 0x2109.
- pass
+
# Generic, \" -> ":
data = wrap_into_ert(data, r'\"', '"')
+
# Math:
+ mathre = re.compile('^(.*?)(\$.*?\$)(.*)')
lines = data.split('\n')
for line in lines:
#document.warning("LINE: " + line)
g = m.group(3)
if s:
# this is non-math!
- s = line2lyx(s)
+ s = latex2ert(s)
subst = s.split('\n')
retval += subst
retval.append("\\begin_inset Formula " + f)
retval.append("\\end_inset")
m = mathre.match(g)
# Handle whatever is left, which is just text
- g = line2lyx(g)
+ g = latex2ert(g)
subst = g.split('\n')
retval += subst
return retval
projects / features.git / commitdiff