#! /usr/bin/env python
+# -*- coding: iso-8859-1 -*-
# 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
-# This script converts a LaTeX file to a bunch of ppm files using the
-# deprecated dvi->ps->ppm conversion route.
-
+# 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.
-# This legacy support will be removed one day...
+# 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, re, string, sys
-import pipes, tempfile
+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 expressions.
+# Pre-compiled regular expression.
latex_file_re = re.compile("\.tex$")
def usage(prog_name):
- return "Usage: %s <latex file> <dpi> <fg color> <bg color>\n"\
+ return "Usage: %s <latex file> <dpi> ppm <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:
- if os.name == "nt":
- full_path = os.path.join(directory, prog + ".exe")
- else:
- 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 extract_metrics_info(log_file, metrics_file):
metrics = open(metrics_file, 'w')
tp_descent = 0.0
success = 0
- for line in open(log_file, 'r').readlines():
- match = log_re.match(line)
- if match == None:
- continue
+ 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))
+ 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.atof(match.group(2)) + tp_ascent
- descent = string.atof(match.group(3)) - tp_descent
+ if snippet:
+ ascent = string.atof(match.group(2)) + tp_ascent
+ descent = string.atof(match.group(3)) - tp_descent
- frac = 0.5
- if abs(ascent + descent) > 0.1:
- frac = ascent / (ascent + descent)
+ frac = 0.5
+ if abs(ascent + descent) > 0.1:
+ frac = ascent / (ascent + descent)
- metrics.write("Snippet %s %f\n" % (match.group(1), frac))
+ 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))
+ 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
# Default values
magnification = 1000.0
- fontsize = 0.0
-
- 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
-
+ 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 get_version_info():
- version_re = re.compile("([0-9])\.([0-9])")
-
- match = version_re.match(sys.version)
- if match == None:
- error("Unable to extract version info from 'sys.version'")
-
- return string.atoi(match.group(1)), string.atoi(match.group(2))
-
-
-def copyfileobj(fsrc, fdst, rewind=0, length=16*1024):
- """copy data from file-like object fsrc to file-like object fdst"""
- if rewind:
- fsrc.flush()
- fsrc.seek(0)
-
- while 1:
- buf = fsrc.read(length)
- if not buf:
- break
- fdst.write(buf)
-
-
-class TempFile:
- """clone of tempfile.TemporaryFile to use with python < 2.0."""
- # Cache the unlinker so we don't get spurious errors at shutdown
- # when the module-level "os" is None'd out. Note that this must
- # be referenced as self.unlink, because the name TempFile
- # may also get None'd out before __del__ is called.
- unlink = os.unlink
-
- def __init__(self):
- self.filename = tempfile.mktemp()
- self.file = open(self.filename,"w+b")
- self.close_called = 0
-
- def close(self):
- if not self.close_called:
- self.close_called = 1
- self.file.close()
- self.unlink(self.filename)
-
- def __del__(self):
- self.close()
-
- def read(self, size = -1):
- return self.file.read(size)
-
- def write(self, line):
- return self.file.write(line)
-
- def seek(self, offset):
- return self.file.seek(offset)
-
- def flush(self):
- return self.file.flush()
-
-
-def mkstemp():
- """create a secure temporary file and return its object-like file"""
- major, minor = get_version_info()
-
- if major >= 2 and minor >= 0:
- return tempfile.TemporaryFile()
- else:
- return TempFile()
-
def legacy_latex_file(latex_file, fg_color, bg_color):
use_preview_re = re.compile("(\\\\usepackage\[[^]]+)(\]{preview})")
tmp = mkstemp()
success = 0
- 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))
+ 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)
def crop_files(pnmcrop, basename):
t = pipes.Template()
- t.append("%s -left" % pnmcrop, '--')
- t.append("%s -right" % pnmcrop, '--')
+ t.append('%s -left' % pnmcrop, '--')
+ t.append('%s -right' % pnmcrop, '--')
for file in glob.glob("%s*.ppm" % basename):
tmp = mkstemp()
if len(argv) != 6:
error(usage(argv[0]))
- # Ignore argv[1]
-
- dir, latex_file = os.path.split(argv[2])
+ dir, latex_file = os.path.split(argv[1])
if len(dir) != 0:
os.chdir(dir)
- dpi = string.atoi(argv[3])
+ 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.getenv("PATH"), os.pathsep)
+ 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(["gswin32", "gs"], path)
+ gs = find_exe_or_terminate(["gswin32c", "gs"], path)
pnmcrop = find_exe(["pnmcrop"], path)
# Move color information into the latex file.
error("Unable to move color info into the latex file")
# 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:
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_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))
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_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)
error("Failed to extract metrics info from %s" % log_file)
return 0
+
+
+if __name__ == "__main__":
+ legacy_conversion(sys.argv)
projects / lyx.git / blobdiff