#! /usr/bin/env python
-# -*- coding: iso-8859-1 -*-
+# -*- coding: utf-8 -*-
# file lyxpreview2bitmap.py
# This file is part of LyX, the document processor.
# author Angus Leeming
# with much advice from members of the preview-latex project:
# David Kastrup, dak@gnu.org and
-# Jan-Åke Larsson, jalar@mai.liu.se.
+# Jan-Åke Larsson, jalar@mai.liu.se.
# Full author contact details are available in file CREDITS
def extract_metrics_info(dvipng_stdout, metrics_file):
metrics = open(metrics_file, 'w')
- metrics_re = re.compile("\[([0-9]+) depth=(-?[0-9]+) height=(-?[0-9]+)")
+# "\[[0-9]+" can match two kinds of numbers: page numbers from dvipng
+# and glyph numbers from mktexpk. The glyph numbers always match
+# "\[[0-9]+\]" while the page number never is followed by "\]". Thus:
+ page_re = re.compile("\[([0-9]+)[^]]");
+ metrics_re = re.compile("depth=(-?[0-9]+) height=(-?[0-9]+)")
success = 0
+ page = ""
pos = 0
while 1:
+ match = page_re.search(dvipng_stdout, pos)
+ if match == None:
+ break
+ page = match.group(1)
+ pos = match.end()
match = metrics_re.search(dvipng_stdout, pos)
if match == None:
break
success = 1
# Calculate the 'ascent fraction'.
- descent = string.atof(match.group(2))
- ascent = string.atof(match.group(3))
+ descent = string.atof(match.group(1))
+ ascent = string.atof(match.group(2))
+
frac = 0.5
- if abs(ascent + descent) > 0.1:
- frac = ascent / (ascent + descent)
+ if ascent >= 0 or descent >= 0:
+ if abs(ascent + descent) > 0.1:
+ frac = ascent / (ascent + descent)
+
+ # Sanity check
+ if frac < 0:
+ frac = 0.5
- metrics.write("Snippet %s %f\n" % (match.group(1), frac))
- pos = match.end(3) + 2
+ metrics.write("Snippet %s %f\n" % (page, frac))
+ pos = match.end() + 2
return success
for png_file in glob.glob("%s*.png" % basename):
ppm_file = png_file_re.sub(".ppm", png_file)
- p2p_cmd = "'%s' '%s'" % (pngtopnm, png_file)
+ p2p_cmd = '%s "%s"' % (pngtopnm, png_file)
p2p_status, p2p_stdout = run_command(p2p_cmd)
if p2p_status != None:
error("Unable to convert %s to ppm format" % png_file)
bg_color = make_texcolor(argv[5])
# External programs used by the script.
- path = string.split(os.getenv("PATH"), os.pathsep)
+ path = string.split(os.environ["PATH"], os.pathsep)
latex = find_exe_or_terminate(["pplatex", "latex2e", "latex"], path)
# This can go once dvipng becomes widespread.
pngtopnm = find_exe_or_terminate(["pngtopnm"], path)
# Compile the latex file.
- latex_call = "'%s' '%s'" % (latex, latex_file)
+ latex_call = '%s "%s"' % (latex, latex_file)
latex_status, latex_stdout = run_command(latex_call)
if latex_status != None:
# Run the dvi file through dvipng.
dvi_file = latex_file_re.sub(".dvi", latex_file)
- dvipng_call = "'%s' -Ttight -depth -height -D %d -fg '%s' -bg '%s' '%s'" \
+ dvipng_call = '%s -Ttight -depth -height -D %d -fg "%s" -bg "%s" "%s"' \
% (dvipng, dpi, fg_color, bg_color, dvi_file)
dvipng_status, dvipng_stdout = run_command(dvipng_call)