#! /usr/bin/env python
-# -*- coding: iso-8859-1 -*-
+# -*- coding: utf-8 -*-
# file lyxpreview2bitmap.py
# This file is part of LyX, the document processor.
# lyxpreview2bitmap.py png 0lyxpreview.tex 128 000000 faf0e6
# This script takes five arguments:
-# FORMAT: either 'png' or 'ppm'. The desired output format.
+# FORMAT: The desired output format. Either 'png' or 'ppm'.
# TEXFILE: the name of the .tex file to be converted.
-# DPI: a scale factor, passed to dvipng.
+# DPI: a scale factor, used to ascertain the resolution of the
+# generated image which is then passed to gs.
# FG_COLOR: the foreground color as a hexadecimal string, eg '000000'.
# BG_COLOR: the background color as a hexadecimal string, eg 'faf0e6'.
# the images correctly on the screen.
import glob, os, re, string, sys
+
from legacy_lyxpreview2ppm import legacy_conversion
+from lyxpreview_tools import error, find_exe, \
+ find_exe_or_terminate, run_command
+
# Pre-compiled regular expressions.
hexcolor_re = re.compile("^[0-9a-fA-F]{6}$")
def usage(prog_name):
- return "Usage: %s <latex file> <dpi> <fg color> <bg color>\n"\
+ return "Usage: %s <format> <latex file> <dpi> <fg color> <bg color>\n"\
"\twhere the colors are hexadecimal strings, eg 'faf0e6'"\
% prog_name
-def error(message):
- sys.stderr.write(message + '\n')
- sys.exit(1)
-
-
-def find_exe(candidates, path):
- for prog in candidates:
- for directory in path:
- full_path = os.path.join(directory, prog)
- if os.access(full_path, os.X_OK):
- return full_path
-
- return None
-
-
-def find_exe_or_terminate(candidates, path):
- exe = find_exe(candidates, path)
- if exe == None:
- error("Unable to find executable from '%s'" % string.join(candidates))
-
- return exe
-
-
-def run_command(cmd):
- handle = os.popen(cmd, 'r')
- cmd_stdout = handle.read()
- cmd_status = handle.close()
-
- return cmd_status, cmd_stdout
-
-
def make_texcolor(hexcolor):
# Test that the input string contains 6 hexadecimal chars.
if not hexcolor_re.match(hexcolor):
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)
- metrics.write("Snippet %s %f\n" % (match.group(1), frac))
- pos = match.end(3) + 2
+ # Sanity check
+ if frac < 0:
+ frac = 0.5
+
+ 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.
dvipng = find_exe(["dvipng"], path)
if dvipng == None:
if output_format == "ppm":
- return legacy_conversion(argv)
+ # The data is input to legacy_conversion in as similar
+ # as possible a manner to that input to the code used in
+ # LyX 1.3.x.
+ vec = [ argv[0], argv[2], argv[3], argv[1], argv[4], argv[5] ]
+ return legacy_conversion(vec)
else:
error("The old 'dvi->ps->ppm' conversion requires "
"ppm as the output format")
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)
return 0
+
if __name__ == "__main__":
main(sys.argv)