mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-11-06 00:10:59 +00:00
37dc5aeabe
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14565 a592a061-630c-0410-9148-cb99ea01b6c8
300 lines
9.9 KiB
Python
300 lines
9.9 KiB
Python
#! /usr/bin/env python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# file legacy_lyxpreview2ppm.py
|
|
# This file is part of LyX, the document processor.
|
|
# Licence details can be found in the file COPYING.
|
|
|
|
# author Angus Leeming
|
|
# Full author contact details are available in file CREDITS
|
|
|
|
# with much advice from members of the preview-latex project:
|
|
# David Kastrup, dak@gnu.org and
|
|
# Jan-Åke Larsson, jalar@mai.liu.se.
|
|
# and with much help testing the code under Windows from
|
|
# Paul A. Rubin, rubin@msu.edu.
|
|
|
|
# This script takes a LaTeX file and generates a collection of
|
|
# ppm image files, one per previewed snippet.
|
|
# Example usage:
|
|
# legacy_lyxpreview2bitmap.py 0lyxpreview.tex 128 ppm 000000 faf0e6
|
|
|
|
# This script takes five arguments:
|
|
# TEXFILE: the name of the .tex file to be converted.
|
|
# SCALEFACTOR: a scale factor, used to ascertain the resolution of the
|
|
# generated image which is then passed to gs.
|
|
# OUTPUTFORMAT: the format of the output bitmap image files.
|
|
# This particular script can produce only "ppm" format output.
|
|
# FG_COLOR: the foreground color as a hexadecimal string, eg '000000'.
|
|
# BG_COLOR: the background color as a hexadecimal string, eg 'faf0e6'.
|
|
|
|
# Decomposing TEXFILE's name as DIR/BASE.tex, this script will,
|
|
# if executed successfully, leave in DIR:
|
|
# * a (possibly large) number of image files with names
|
|
# like BASE[0-9]+.ppm
|
|
# * a file BASE.metrics, containing info needed by LyX to position
|
|
# the images correctly on the screen.
|
|
|
|
# The script uses several external programs and files:
|
|
# * A latex executable;
|
|
# * preview.sty;
|
|
# * dvips;
|
|
# * gs;
|
|
# * pnmcrop (optional).
|
|
|
|
# preview.sty is part of the preview-latex project
|
|
# http://preview-latex.sourceforge.net/
|
|
# Alternatively, it can be obtained from
|
|
# CTAN/support/preview-latex/
|
|
|
|
# The script uses the deprecated dvi->ps->ppm conversion route.
|
|
# If possible, please grab 'dvipng'; it's faster and more robust.
|
|
# If you have it then this script will not be invoked by
|
|
# lyxpreview2bitmap.py.
|
|
# Warning: this legacy support will be removed one day...
|
|
|
|
import glob, os, pipes, re, string, sys
|
|
|
|
from lyxpreview_tools import copyfileobj, error, find_exe, \
|
|
find_exe_or_terminate, mkstemp, run_command
|
|
|
|
# Pre-compiled regular expression.
|
|
latex_file_re = re.compile("\.tex$")
|
|
|
|
|
|
def usage(prog_name):
|
|
return "Usage: %s <latex file> <dpi> ppm <fg color> <bg color>\n"\
|
|
"\twhere the colors are hexadecimal strings, eg 'faf0e6'"\
|
|
% prog_name
|
|
|
|
|
|
def extract_metrics_info(log_file, metrics_file):
|
|
metrics = open(metrics_file, 'w')
|
|
|
|
log_re = re.compile("Preview: ([ST])")
|
|
data_re = re.compile("(-?[0-9]+) (-?[0-9]+) (-?[0-9]+) (-?[0-9]+)")
|
|
|
|
tp_ascent = 0.0
|
|
tp_descent = 0.0
|
|
|
|
success = 0
|
|
try:
|
|
for line in open(log_file, 'r').readlines():
|
|
match = log_re.match(line)
|
|
if match == None:
|
|
continue
|
|
|
|
snippet = (match.group(1) == 'S')
|
|
success = 1
|
|
match = data_re.search(line)
|
|
if match == None:
|
|
error("Unexpected data in %s\n%s" % (log_file, line))
|
|
|
|
if snippet:
|
|
ascent = string.atoi(match.group(2))
|
|
descent = string.atoi(match.group(3))
|
|
|
|
frac = 0.5
|
|
if ascent >= 0 and descent >= 0:
|
|
ascent = float(ascent) + tp_ascent
|
|
descent = float(descent) - tp_descent
|
|
|
|
if abs(ascent + descent) > 0.1:
|
|
frac = ascent / (ascent + descent)
|
|
|
|
# Sanity check
|
|
if frac < 0 or frac > 1:
|
|
frac = 0.5
|
|
|
|
metrics.write("Snippet %s %f\n" % (match.group(1), frac))
|
|
|
|
else:
|
|
tp_descent = string.atof(match.group(2))
|
|
tp_ascent = string.atof(match.group(4))
|
|
|
|
except:
|
|
# Unable to open the file, but do nothing here because
|
|
# the calling function will act on the value of 'success'.
|
|
warning('Warning in extract_metrics_info! Unable to open "%s"' % log_file)
|
|
warning(`sys.exc_type` + ',' + `sys.exc_value`)
|
|
|
|
return success
|
|
|
|
|
|
def extract_resolution(log_file, dpi):
|
|
fontsize_re = re.compile("Preview: Fontsize")
|
|
magnification_re = re.compile("Preview: Magnification")
|
|
extract_decimal_re = re.compile("([0-9\.]+)")
|
|
extract_integer_re = re.compile("([0-9]+)")
|
|
|
|
found_fontsize = 0
|
|
found_magnification = 0
|
|
|
|
# Default values
|
|
magnification = 1000.0
|
|
fontsize = 10.0
|
|
|
|
try:
|
|
for line in open(log_file, 'r').readlines():
|
|
if found_fontsize and found_magnification:
|
|
break
|
|
|
|
if not found_fontsize:
|
|
match = fontsize_re.match(line)
|
|
if match != None:
|
|
match = extract_decimal_re.search(line)
|
|
if match == None:
|
|
error("Unable to parse: %s" % line)
|
|
fontsize = string.atof(match.group(1))
|
|
found_fontsize = 1
|
|
continue
|
|
|
|
if not found_magnification:
|
|
match = magnification_re.match(line)
|
|
if match != None:
|
|
match = extract_integer_re.search(line)
|
|
if match == None:
|
|
error("Unable to parse: %s" % line)
|
|
magnification = string.atof(match.group(1))
|
|
found_magnification = 1
|
|
continue
|
|
|
|
except:
|
|
warning('Warning in extract_resolution! Unable to open "%s"' % log_file)
|
|
warning(`sys.exc_type` + ',' + `sys.exc_value`)
|
|
|
|
# This is safe because both fontsize and magnification have
|
|
# non-zero default values.
|
|
return dpi * (10.0 / fontsize) * (1000.0 / magnification)
|
|
|
|
|
|
def legacy_latex_file(latex_file, fg_color, bg_color):
|
|
use_preview_re = re.compile("(\\\\usepackage\[[^]]+)(\]{preview})")
|
|
|
|
tmp = mkstemp()
|
|
|
|
success = 0
|
|
try:
|
|
for line in open(latex_file, 'r').readlines():
|
|
match = use_preview_re.match(line)
|
|
if match == None:
|
|
tmp.write(line)
|
|
continue
|
|
|
|
success = 1
|
|
tmp.write("%s,dvips,tightpage%s\n\n" \
|
|
"\\AtBeginDocument{\\AtBeginDvi{%%\n" \
|
|
"\\special{!userdict begin/bop-hook{//bop-hook exec\n" \
|
|
"<%s%s>{255 div}forall setrgbcolor\n" \
|
|
"clippath fill setrgbcolor}bind def end}}}\n" \
|
|
% (match.group(1), match.group(2), fg_color, bg_color))
|
|
|
|
except:
|
|
# Unable to open the file, but do nothing here because
|
|
# the calling function will act on the value of 'success'.
|
|
warning('Warning in legacy_latex_file! Unable to open "%s"' % latex_file)
|
|
warning(`sys.exc_type` + ',' + `sys.exc_value`)
|
|
|
|
if success:
|
|
copyfileobj(tmp, open(latex_file,"wb"), 1)
|
|
|
|
return success
|
|
|
|
|
|
def crop_files(pnmcrop, basename):
|
|
t = pipes.Template()
|
|
t.append('%s -left' % pnmcrop, '--')
|
|
t.append('%s -right' % pnmcrop, '--')
|
|
|
|
for file in glob.glob("%s*.ppm" % basename):
|
|
tmp = mkstemp()
|
|
new = t.open(file, "r")
|
|
copyfileobj(new, tmp)
|
|
if not new.close():
|
|
copyfileobj(tmp, open(file,"wb"), 1)
|
|
|
|
|
|
def legacy_conversion(argv):
|
|
# Parse and manipulate the command line arguments.
|
|
if len(argv) != 6:
|
|
error(usage(argv[0]))
|
|
|
|
dir, latex_file = os.path.split(argv[1])
|
|
if len(dir) != 0:
|
|
os.chdir(dir)
|
|
|
|
dpi = string.atoi(argv[2])
|
|
|
|
output_format = argv[3]
|
|
if output_format != "ppm":
|
|
error("This script will generate ppm format images only.")
|
|
|
|
fg_color = argv[4]
|
|
bg_color = argv[5]
|
|
|
|
# External programs used by the script.
|
|
path = string.split(os.environ["PATH"], os.pathsep)
|
|
latex = find_exe_or_terminate(["pplatex", "latex2e", "latex"], path)
|
|
dvips = find_exe_or_terminate(["dvips"], path)
|
|
gs = find_exe_or_terminate(["gswin32c", "gs"], path)
|
|
pnmcrop = find_exe(["pnmcrop"], path)
|
|
|
|
# Move color information into the latex file.
|
|
if not legacy_latex_file(latex_file, fg_color, bg_color):
|
|
error("Unable to move color info into the latex file")
|
|
|
|
# Compile the latex file.
|
|
latex_call = '%s "%s"' % (latex, latex_file)
|
|
|
|
latex_status, latex_stdout = run_command(latex_call)
|
|
if latex_status != None:
|
|
error("%s failed to compile %s" \
|
|
% (os.path.basename(latex), latex_file))
|
|
|
|
# Run the dvi file through dvips.
|
|
dvi_file = latex_file_re.sub(".dvi", latex_file)
|
|
ps_file = latex_file_re.sub(".ps", latex_file)
|
|
|
|
dvips_call = '%s -o "%s" "%s"' % (dvips, ps_file, dvi_file)
|
|
|
|
dvips_status, dvips_stdout = run_command(dvips_call)
|
|
if dvips_status != None:
|
|
error("Failed: %s %s" % (os.path.basename(dvips), dvi_file))
|
|
|
|
# Extract resolution data for gs from the log file.
|
|
log_file = latex_file_re.sub(".log", latex_file)
|
|
resolution = extract_resolution(log_file, dpi)
|
|
|
|
# Older versions of gs have problems with a large degree of
|
|
# anti-aliasing at high resolutions
|
|
alpha = 4
|
|
if resolution > 150:
|
|
alpha = 2
|
|
|
|
# Generate the bitmap images
|
|
gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pnmraw ' \
|
|
'-sOutputFile="%s%%d.ppm" ' \
|
|
'-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
|
|
'-r%f "%s"' \
|
|
% (gs, latex_file_re.sub("", latex_file), \
|
|
alpha, alpha, resolution, ps_file)
|
|
|
|
gs_status, gs_stdout = run_command(gs_call)
|
|
if gs_status != None:
|
|
error("Failed: %s %s" % (os.path.basename(gs), ps_file))
|
|
|
|
# Crop the images
|
|
if pnmcrop != None:
|
|
crop_files(pnmcrop, latex_file_re.sub("", latex_file))
|
|
|
|
# Extract metrics info from the log file.
|
|
metrics_file = latex_file_re.sub(".metrics", latex_file)
|
|
if not extract_metrics_info(log_file, metrics_file):
|
|
error("Failed to extract metrics info from %s" % log_file)
|
|
|
|
return 0
|
|
|
|
|
|
if __name__ == "__main__":
|
|
legacy_conversion(sys.argv)
|