mirror of
https://git.lyx.org/repos/lyx.git
synced 2024-12-13 17:20:55 +00:00
7013445bdd
Also fix a glitch recently reported on the devel list.
No status line as this is a further amendement to b3d2ffc0.
558 lines
21 KiB
Python
558 lines
21 KiB
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
|
|
# png or 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|png)
|
|
# * 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:
|
|
# * python 2.4 or later (subprocess module);
|
|
# * A latex executable;
|
|
# * preview.sty;
|
|
# * dvips;
|
|
# * gs;
|
|
# * pdflatex (optional);
|
|
# * pnmcrop (optional).
|
|
# * pdftocairo (optional).
|
|
# * epstopdf (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/
|
|
|
|
# What does this script do?
|
|
# [legacy_conversion]
|
|
# 0) Process command-line arguments
|
|
# [legacy_conversion_step1]
|
|
# 1) Call latex to create a DVI file from LaTeX
|
|
# [legacy_conversion_step2]
|
|
# 2) Call dvips to create one PS file for each DVI page
|
|
# [legacy_conversion_step3]
|
|
# 3) If dvips fails look for PDF and call pdftocairo or gs to produce bitmaps
|
|
# 4) Otherwise call pdftocairo or gs on each PostScript file to produce bitmaps
|
|
# [legacy_conversion_pdflatex]
|
|
# 5) Keep track of pages on which gs failed and pass them to pdflatex
|
|
# 6) Call pdftocairo or gs on the PDF output from pdflatex to produce bitmaps
|
|
# 7) Extract and write to file (or return to lyxpreview2bitmap)
|
|
# metrics from both methods (standard and pdflatex)
|
|
|
|
# The script uses the old dvi->ps->png conversion route,
|
|
# which is good when using PSTricks, TikZ or other packages involving
|
|
# PostScript literals (steps 1, 2, 4).
|
|
# This script also generates bitmaps from PDF created by a call to
|
|
# lyxpreview2bitmap.py passing "pdflatex" to the CONVERTER parameter
|
|
# (step 3).
|
|
# Finally, there's also has a fallback method based on pdflatex, which
|
|
# is required in certain cases, if hyperref is active for instance,
|
|
# (step 5, 6).
|
|
# If possible, dvipng should be used, as it's much faster.
|
|
# If possible, the script will use pdftocairo instead of gs,
|
|
# as it's much faster and gives better results.
|
|
|
|
import glob, os, pipes, re, string, sys
|
|
|
|
from lyxpreview_tools import check_latex_log, copyfileobj, error, filter_pages,\
|
|
find_exe, find_exe_or_terminate, join_metrics_and_rename, latex_commands, \
|
|
latex_file_re, make_texcolor, mkstemp, pdflatex_commands, progress, \
|
|
run_command, run_latex, warning, write_metrics_info
|
|
|
|
|
|
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
|
|
|
|
# Returns a list of tuples containing page number and ascent fraction
|
|
# extracted from dvipng output.
|
|
# Use write_metrics_info to create the .metrics file with this info
|
|
def legacy_extract_metrics_info(log_file):
|
|
|
|
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
|
|
results = []
|
|
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.atof(match.group(2))
|
|
descent = string.atof(match.group(3))
|
|
|
|
frac = 0.5
|
|
if ascent == 0 and descent == 0:
|
|
# This is an empty image, forbid its display
|
|
frac = -1.0
|
|
elif ascent >= 0 or descent >= 0:
|
|
ascent = ascent + tp_ascent
|
|
descent = descent - tp_descent
|
|
|
|
if abs(ascent + descent) > 0.1:
|
|
frac = ascent / (ascent + descent)
|
|
|
|
# Sanity check
|
|
if frac < 0 or frac > 1:
|
|
frac = 0.5
|
|
|
|
results.append((int(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 legacy_extract_metrics_info! Unable to open "%s"' % log_file)
|
|
warning(`sys.exc_type` + ',' + `sys.exc_value`)
|
|
|
|
if success == 0:
|
|
error("Failed to extract metrics info from %s" % log_file)
|
|
|
|
return results
|
|
|
|
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(r"\s*\\usepackage\[([^]]+)\]{preview}")
|
|
fg_color_gr = make_texcolor(fg_color, True)
|
|
bg_color_gr = make_texcolor(bg_color, True)
|
|
|
|
tmp = mkstemp()
|
|
|
|
success = 0
|
|
try:
|
|
f = open(latex_file, 'r')
|
|
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`)
|
|
|
|
for line in f.readlines():
|
|
if success:
|
|
tmp.write(line)
|
|
continue
|
|
match = use_preview_re.match(line)
|
|
if match == None:
|
|
tmp.write(line)
|
|
continue
|
|
success = 1
|
|
# Package order: color should be loaded before preview
|
|
# Preview options: add the options lyx and tightpage
|
|
tmp.write(r"""
|
|
\usepackage{color}
|
|
\definecolor{fg}{rgb}{%s}
|
|
\definecolor{bg}{rgb}{%s}
|
|
\pagecolor{bg}
|
|
\usepackage[%s,tightpage]{preview}
|
|
\makeatletter
|
|
\def\t@a{cmr}
|
|
\if\f@family\t@a
|
|
\IfFileExists{lmodern.sty}{\usepackage{lmodern}}{\usepackage{ae,aecompl}}
|
|
\fi
|
|
\g@addto@macro\preview{\begingroup\color{bg}\special{ps::clippath fill}\color{fg}}
|
|
\g@addto@macro\endpreview{\endgroup}
|
|
\makeatother
|
|
""" % (fg_color_gr, bg_color_gr, match.group(1)))
|
|
|
|
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, skipMetrics = False):
|
|
# Parse and manipulate the command line arguments.
|
|
if len(argv) == 7:
|
|
latex = [argv[6]]
|
|
elif len(argv) != 6:
|
|
error(usage(argv[0]))
|
|
else:
|
|
latex = None
|
|
|
|
dir, latex_file = os.path.split(argv[1])
|
|
if len(dir) != 0:
|
|
os.chdir(dir)
|
|
|
|
dpi = string.atoi(argv[2])
|
|
|
|
output_format = argv[3]
|
|
|
|
fg_color = argv[4]
|
|
bg_color = argv[5]
|
|
|
|
# External programs used by the script.
|
|
latex = find_exe_or_terminate(latex or latex_commands)
|
|
|
|
pdf_output = latex in pdflatex_commands
|
|
|
|
return legacy_conversion_step1(latex_file, dpi, output_format, fg_color,
|
|
bg_color, latex, pdf_output, skipMetrics)
|
|
|
|
|
|
# Add color info to the latex file, since ghostscript doesn't
|
|
# have the option to set foreground and background colors on
|
|
# the command line. Run the resulting file through latex.
|
|
def legacy_conversion_step1(latex_file, dpi, output_format, fg_color, bg_color,
|
|
latex, pdf_output = False, skipMetrics = False):
|
|
|
|
# Move color information, lyx and tightpage options into the latex file.
|
|
if not legacy_latex_file(latex_file, fg_color, bg_color):
|
|
error("""Unable to move the color information, and the lyx and tightpage
|
|
options of preview-latex, into the latex file""")
|
|
|
|
# Compile the latex file.
|
|
latex_status, latex_stdout = run_latex(latex, latex_file)
|
|
if latex_status:
|
|
progress("Will try to recover from %s failure" % latex)
|
|
|
|
if pdf_output:
|
|
return legacy_conversion_step3(latex_file, dpi, output_format, True, skipMetrics)
|
|
else:
|
|
return legacy_conversion_step2(latex_file, dpi, output_format, skipMetrics)
|
|
|
|
# Creates a new LaTeX file from the original with pages specified in
|
|
# failed_pages, pass it through pdflatex and updates the metrics
|
|
# from the standard legacy route
|
|
def legacy_conversion_pdflatex(latex_file, failed_pages, legacy_metrics,
|
|
use_pdftocairo, conv, gs_device, gs_ext, alpha, resolution, output_format):
|
|
|
|
error_count = 0
|
|
|
|
# Search for pdflatex executable
|
|
pdflatex = find_exe(["pdflatex"])
|
|
if pdflatex == None:
|
|
warning("Can't find pdflatex. Some pages failed with all the possible routes.")
|
|
failed_pages = []
|
|
else:
|
|
# Create a new LaTeX file from the original but only with failed pages
|
|
pdf_latex_file = latex_file_re.sub("_pdflatex.tex", latex_file)
|
|
filter_pages(latex_file, pdf_latex_file, failed_pages)
|
|
|
|
# pdflatex call
|
|
error_pages = []
|
|
pdflatex_status, pdflatex_stdout = run_latex(pdflatex, pdf_latex_file)
|
|
if pdflatex_status:
|
|
error_pages = check_latex_log(latex_file_re.sub(".log", pdf_latex_file))
|
|
|
|
pdf_file = latex_file_re.sub(".pdf", pdf_latex_file)
|
|
latex_file_root = latex_file_re.sub("", pdf_latex_file)
|
|
|
|
# Converter call to produce bitmaps
|
|
if use_pdftocairo:
|
|
conv_call = '%s -png -transp -r %d "%s" "%s"' \
|
|
% (conv, resolution, pdf_file, latex_file_root)
|
|
conv_status, conv_stdout = run_command(conv_call)
|
|
if not conv_status:
|
|
seqnum_re = re.compile("-([0-9]+)")
|
|
for name in glob.glob("%s-*.png" % latex_file_root):
|
|
match = seqnum_re.search(name)
|
|
if match != None:
|
|
new_name = seqnum_re.sub(str(int(match.group(1))), name)
|
|
os.rename(name, new_name)
|
|
else:
|
|
conv_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
|
|
'-sOutputFile="%s%%d.%s" ' \
|
|
'-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
|
|
'-r%f "%s"' \
|
|
% (conv, gs_device, latex_file_root, \
|
|
gs_ext, alpha, alpha, resolution, pdf_file)
|
|
conv_status, conv_stdout = run_command(conv_call)
|
|
|
|
if conv_status:
|
|
# Give up!
|
|
warning("Some pages failed with all the possible routes")
|
|
failed_pages = []
|
|
else:
|
|
# We've done it!
|
|
pdf_log_file = latex_file_re.sub(".log", pdf_latex_file)
|
|
pdf_metrics = legacy_extract_metrics_info(pdf_log_file)
|
|
|
|
# Invalidate metrics for pages that produced errors
|
|
if len(error_pages) > 0:
|
|
for index in error_pages:
|
|
pdf_metrics.pop(index - 1)
|
|
pdf_metrics.insert(index - 1, (index, -1.0))
|
|
error_count += 1
|
|
|
|
original_bitmap = latex_file_re.sub("%d." + output_format, pdf_latex_file)
|
|
destination_bitmap = latex_file_re.sub("%d." + output_format, latex_file)
|
|
|
|
# Join the metrics with the those from dvips and rename the bitmap images
|
|
join_metrics_and_rename(legacy_metrics, pdf_metrics, failed_pages,
|
|
original_bitmap, destination_bitmap)
|
|
|
|
return error_count
|
|
|
|
|
|
# The file has been processed through latex and we expect dvi output.
|
|
# Run dvips, taking note whether it was successful.
|
|
def legacy_conversion_step2(latex_file, dpi, output_format, skipMetrics = False):
|
|
# External programs used by the script.
|
|
dvips = find_exe_or_terminate(["dvips"])
|
|
|
|
# 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 -i -o "%s" "%s"' % (dvips, ps_file, dvi_file)
|
|
dvips_failed = False
|
|
|
|
dvips_status, dvips_stdout = run_command(dvips_call)
|
|
if dvips_status:
|
|
warning('Failed: %s %s ... looking for PDF' \
|
|
% (os.path.basename(dvips), dvi_file))
|
|
dvips_failed = True
|
|
|
|
return legacy_conversion_step3(latex_file, dpi, output_format, dvips_failed, skipMetrics)
|
|
|
|
|
|
# Either latex and dvips have been run and we have a ps file, or
|
|
# pdflatex has been run and we have a pdf file. Proceed with pdftocairo or gs.
|
|
def legacy_conversion_step3(latex_file, dpi, output_format, dvips_failed, skipMetrics = False):
|
|
# External programs used by the script.
|
|
gs = find_exe_or_terminate(["gswin32c", "gswin64c", "gs"])
|
|
pnmcrop = find_exe(["pnmcrop"])
|
|
pdftocairo = find_exe(["pdftocairo"])
|
|
epstopdf = find_exe(["epstopdf"])
|
|
use_pdftocairo = pdftocairo != None and output_format == "png"
|
|
if use_pdftocairo:
|
|
conv = pdftocairo
|
|
else:
|
|
conv = gs
|
|
|
|
# Files to process
|
|
pdf_file = latex_file_re.sub(".pdf", latex_file)
|
|
ps_file = latex_file_re.sub(".ps", latex_file)
|
|
|
|
# The latex file name without extension
|
|
latex_file_root = latex_file_re.sub("", latex_file)
|
|
|
|
# Extract resolution data for the converter from the log file.
|
|
log_file = latex_file_re.sub(".log", latex_file)
|
|
resolution = extract_resolution(log_file, dpi)
|
|
|
|
# Check whether some pages produced errors
|
|
error_pages = check_latex_log(log_file)
|
|
|
|
# Older versions of gs have problems with a large degree of
|
|
# anti-aliasing at high resolutions
|
|
alpha = 4
|
|
if resolution > 150:
|
|
alpha = 2
|
|
|
|
gs_device = "png16m"
|
|
gs_ext = "png"
|
|
if output_format == "ppm":
|
|
gs_device = "pnmraw"
|
|
gs_ext = "ppm"
|
|
|
|
# Extract the metrics from the log file
|
|
legacy_metrics = legacy_extract_metrics_info(log_file)
|
|
|
|
# List of pages which failed to produce a correct output
|
|
failed_pages = []
|
|
|
|
# Generate the bitmap images
|
|
if dvips_failed:
|
|
# dvips failed, maybe there's a PDF, try to produce bitmaps
|
|
if use_pdftocairo:
|
|
conv_call = '%s -png -transp -r %d "%s" "%s"' \
|
|
% (pdftocairo, resolution, pdf_file, latex_file_root)
|
|
|
|
conv_status, conv_stdout = run_command(conv_call)
|
|
if not conv_status:
|
|
seqnum_re = re.compile("-([0-9]+)")
|
|
for name in glob.glob("%s-*.png" % latex_file_root):
|
|
match = seqnum_re.search(name)
|
|
if match != None:
|
|
new_name = seqnum_re.sub(str(int(match.group(1))), name)
|
|
os.rename(name, new_name)
|
|
else:
|
|
conv_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
|
|
'-sOutputFile="%s%%d.%s" ' \
|
|
'-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
|
|
'-r%f "%s"' \
|
|
% (gs, gs_device, latex_file_root, \
|
|
gs_ext, alpha, alpha, resolution, pdf_file)
|
|
|
|
conv_status, conv_stdout = run_command(conv_call)
|
|
|
|
if conv_status:
|
|
error("Failed: %s %s" % (os.path.basename(conv), pdf_file))
|
|
else:
|
|
# Model for calling the converter on each file
|
|
if use_pdftocairo and epstopdf != None:
|
|
conv_call = '%s -png -transp -singlefile -r %d "%%s" "%s%%d"' \
|
|
% (pdftocairo, resolution, latex_file_root)
|
|
else:
|
|
conv_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \
|
|
'-sOutputFile="%s%%d.%s" ' \
|
|
'-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \
|
|
'-r%f "%%s"' \
|
|
% (gs, gs_device, latex_file_root, \
|
|
gs_ext, alpha, alpha, resolution)
|
|
|
|
i = 0
|
|
# Collect all the PostScript files (like *.001, *.002, ...)
|
|
ps_files = glob.glob("%s.[0-9][0-9][0-9]" % latex_file_root)
|
|
ps_files.sort()
|
|
|
|
# Call the converter for each file
|
|
for file in ps_files:
|
|
i = i + 1
|
|
progress("Processing page %s, file %s" % (i, file))
|
|
if use_pdftocairo and epstopdf != None:
|
|
conv_name = "epstopdf"
|
|
conv_status, conv_stdout = run_command("%s --outfile=%s.pdf %s"
|
|
% (epstopdf, file, file))
|
|
if not conv_status:
|
|
conv_name = "pdftocairo"
|
|
file = file + ".pdf"
|
|
conv_status, conv_stdout = run_command(conv_call % (file, i))
|
|
else:
|
|
conv_name = "ghostscript"
|
|
conv_status, conv_stdout = run_command(conv_call % (i, file))
|
|
|
|
if conv_status:
|
|
# The converter failed, keep track of this
|
|
warning("%s failed on page %s, file %s" % (conv_name, i, file))
|
|
failed_pages.append(i)
|
|
|
|
# Pass failed pages to pdflatex
|
|
if len(failed_pages) > 0:
|
|
warning("Now trying to obtain failed previews through pdflatex")
|
|
error_count = legacy_conversion_pdflatex(latex_file, failed_pages,
|
|
legacy_metrics, use_pdftocairo, conv, gs_device, gs_ext, alpha,
|
|
resolution, output_format)
|
|
else:
|
|
error_count = 0
|
|
|
|
# Invalidate metrics for pages that produced errors
|
|
if len(error_pages) > 0:
|
|
for index in error_pages:
|
|
if index not in failed_pages:
|
|
legacy_metrics.pop(index - 1)
|
|
legacy_metrics.insert(index - 1, (index, -1.0))
|
|
error_count += 1
|
|
|
|
# Crop the ppm images
|
|
if pnmcrop != None and output_format == "ppm":
|
|
crop_files(pnmcrop, latex_file_root)
|
|
|
|
# Allow to skip .metrics creation for custom management
|
|
# (see the dvipng method)
|
|
if not skipMetrics:
|
|
# Extract metrics info from the log file.
|
|
metrics_file = latex_file_re.sub(".metrics", latex_file)
|
|
write_metrics_info(legacy_metrics, metrics_file)
|
|
if error_count:
|
|
warning("Failed to produce %d preview snippet(s)" % error_count)
|
|
|
|
return (0, legacy_metrics)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
sys.exit(legacy_conversion(sys.argv)[0])
|