import glob, os, re, shutil, string, sys
from legacy_lyxpreview2ppm import legacy_conversion, \
- legacy_conversion_step2
+ legacy_conversion_step2, legacy_extract_metrics_info
from lyxpreview_tools import copyfileobj, error, find_exe, \
- find_exe_or_terminate, make_texcolor, mkstemp, run_command, warning
+ find_exe_or_terminate, make_texcolor, mkstemp, run_command, warning, \
+ write_metrics_info
# Pre-compiled regular expressions.
return "Usage: %s <format> <latex file> <dpi> <fg color> <bg color>\n"\
"\twhere the colors are hexadecimal strings, eg 'faf0e6'"\
% prog_name
-
-
-def extract_metrics_info(dvipng_stdout, metrics_file):
- metrics = open(metrics_file, 'w')
-# "\[[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:
+
+# 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 extract_metrics_info(dvipng_stdout):
+ # "\[[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
+ results = []
while 1:
match = page_re.search(dvipng_stdout, pos)
if match == None:
if abs(ascent + descent) > 0.1:
frac = ascent / (ascent + descent)
- # Sanity check
+ # Sanity check
if frac < 0:
frac = 0.5
- metrics.write("Snippet %s %f\n" % (page, frac))
+ results.append((page, frac))
pos = match.end() + 2
- return success
+ if success == 0:
+ error("Failed to extract metrics info from dvipng")
+
+ return results
def color_pdf(latex_file, bg_color):
latex_status, latex_stdout = run_command(latex_call)
if latex_status != None:
- warning("%s failed to compile %s" \
+ warning("%s had problems compiling %s" \
% (os.path.basename(latex), latex_file))
warning(latex_stdout)
# The dvi output file name
dvi_file = latex_file_re.sub(".dvi", latex_file)
-
+
# Check for PostScript specials in the dvi, badly supported by dvipng
# This is required for correct rendering of PSTricks and TikZ
dv2dt = find_exe_or_terminate(["dv2dt"], path)
- dv2dt_call = '%s %s' % (dv2dt, dvi_file)
+ dv2dt_call = '%s "%s"' % (dv2dt, dvi_file)
# The output from dv2dt goes to stdout
dv2dt_status, dv2dt_output = run_command(dv2dt_call)
psliteral_re = re.compile("^special[1-4] [0-9]+ '(\"|ps:)")
- for dtl_line in dv2dt_output.split("\n"):
- if psliteral_re.match(dtl_line) != None:
+
+ # Parse the dtl file looking for PostScript specials.
+ # Pages using PostScript specials are recorded in ps_pages and then
+ # used to create a different LaTeX file for processing in legacy mode.
+ page_has_ps = False
+ page_index = 0
+ ps_pages = []
+
+ for line in dv2dt_output.split("\n"):
+ # New page
+ if line.startswith("bop"):
+ page_has_ps = False
+ page_index += 1
+
+ # End of page
+ if line.startswith("eop") and page_has_ps:
+ # We save in a list all the PostScript pages
+ ps_pages.append(page_index)
+
+ if psliteral_re.match(line) != None:
# Literal PostScript special detected!
- # Fallback to legacy conversion
- vec = [argv[0], argv[2], argv[3], argv[1], argv[4], argv[5], latex]
- return legacy_conversion(vec)
+ page_has_ps = True
- # Run the dvi file through dvipng.
- dvipng_call = '%s -Ttight -depth -height -D %d -fg "%s" -bg "%s" "%s"' \
- % (dvipng, dpi, fg_color, bg_color, dvi_file)
+ pages_parameter = ""
+ if len(ps_pages) == page_index:
+ # All pages need PostScript, so directly use the legacy method.
+ vec = [argv[0], argv[2], argv[3], argv[1], argv[4], argv[5], latex]
+ return legacy_conversion(vec)
+ elif len(ps_pages) > 0:
+ # Don't process Postscript pages with dvipng by selecting the
+ # wanted pages through the -pp parameter. E.g., dvipng -pp 4-12,14,64
+ pages_parameter = " -pp "
+ skip = True
+ last = -1
+
+ # Use page ranges, as a list of pages could exceed command line
+ # maximum length (especially under Win32)
+ for index in xrange(1, page_index + 1):
+ if (not index in ps_pages) and skip:
+ # We were skipping pages but current page shouldn't be skipped.
+ # Add this page to -pp, it could stay alone or become the
+ # start of a range.
+ pages_parameter += str(index)
+ # Save the starting index to avoid things such as "11-11"
+ last = index
+ # We're not skipping anymore
+ skip = False
+ elif (index in ps_pages) and (not skip):
+ # We weren't skipping but current page should be skipped
+ if last != index - 1:
+ # If the start index of the range is the previous page
+ # then it's not a range
+ pages_parameter += "-" + str(index - 1)
+
+ # Add a separator
+ pages_parameter += ","
+ # Now we're skipping
+ skip = True
+
+ # Remove the trailing separator
+ pages_parameter = pages_parameter.rstrip(",")
+ # We've to manage the case in which the last page is closing a range
+ if (not index in ps_pages) and (not skip) and (last != index):
+ pages_parameter += "-" + str(index)
+ # Run the dvi file through dvipng.
+ dvipng_call = '%s -Ttight -depth -height -D %d -fg "%s" -bg "%s" %s "%s"' \
+ % (dvipng, dpi, fg_color, bg_color, pages_parameter, dvi_file)
dvipng_status, dvipng_stdout = run_command(dvipng_call)
+
if dvipng_status != None:
warning("%s failed to generate images from %s ... looking for PDF" \
% (os.path.basename(dvipng), dvi_file))
# FIXME: skip unnecessary dvips trial in legacy_conversion_step2
return legacy_conversion_step2(latex_file, dpi, output_format)
- # Extract metrics info from dvipng_stdout.
- metrics_file = latex_file_re.sub(".metrics", latex_file)
- if not extract_metrics_info(dvipng_stdout, metrics_file):
- error("Failed to extract metrics info from dvipng")
+ if len(ps_pages) > 0:
+ # Some pages require PostScript.
+ # Create a new LaTeX file just for the snippets needing
+ # the legacy method
+ original_latex = open(latex_file, "r")
+ legacy_latex_file = latex_file_re.sub("_legacy.tex", latex_file)
+ legacy_latex = open(legacy_latex_file, "w")
+
+ page_index = 0
+ skip_page = False
+ for line in original_latex:
+ if line.startswith("\\begin{preview}"):
+ page_index += 1
+ # Skips all pages processed by dvipng
+ skip_page = page_index not in ps_pages
+
+ if not skip_page:
+ legacy_latex.write(line)
+
+ if line.startswith("\\end{preview}"):
+ skip_page = False
+
+ legacy_latex.close()
+ original_latex.close()
+
+ # Pass the new LaTeX file to the legacy method
+ vec = [ argv[0], latex_file_re.sub("_legacy.tex", argv[2]), \
+ argv[3], argv[1], argv[4], argv[5], latex ]
+ legacy_conversion(vec, True)
+
+ # Now we need to mix metrics data from dvipng and the legacy method
+ metrics_file = latex_file_re.sub(".metrics", latex_file)
+
+ dvipng_metrics = extract_metrics_info(dvipng_stdout)
+ legacy_metrics = legacy_extract_metrics_info(latex_file_re.sub("_legacy.log", latex_file))
+
+ # Check whether a page is present in dvipng_metrics, otherwise
+ # add it getting the metrics from legacy_metrics
+ legacy_index = -1;
+ for i in range(page_index):
+ # If we exceed the array bounds or the dvipng_metrics doesn't
+ # match the current one, this page belongs to the legacy method
+ if (i > len(dvipng_metrics) - 1) or (dvipng_metrics[i][0] != str(i + 1)):
+ legacy_index += 1
+
+ # Add this metric from the legacy output
+ dvipng_metrics.insert(i, (str(i + 1), legacy_metrics[legacy_index][1]))
+ # Legacy output filename
+ legacy_output = os.path.join(dir, latex_file_re.sub("_legacy%s.%s" %
+ (legacy_metrics[legacy_index][0], output_format), latex_file))
+
+ # Check whether legacy method actually created the file
+ if os.path.isfile(legacy_output):
+ # Rename the file by removing the "_legacy" suffix
+ # and adjusting the index
+ bitmap_output = os.path.join(dir, latex_file_re.sub("%s.%s" %
+ (str(i + 1), output_format), latex_file))
+ os.rename(legacy_output, bitmap_output)
+
+ # Actually create the .metrics file
+ write_metrics_info(dvipng_metrics, metrics_file)
+ else:
+ # Extract metrics info from dvipng_stdout.
+ # In this case we just used dvipng, so no special metrics
+ # handling is needed.
+ metrics_file = latex_file_re.sub(".metrics", latex_file)
+ write_metrics_info(extract_metrics_info(dvipng_stdout), metrics_file)
# Convert images to ppm format if necessary.
if output_format == "ppm":
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