From 46cb01a5e083787e640c4c58263927e2bcd710ce Mon Sep 17 00:00:00 2001 From: Enrico Forestieri Date: Thu, 20 Jan 2011 23:39:08 +0000 Subject: [PATCH] Fix bug #6720 (Better error handling of instant preview) Patch from Ale revised by me. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@37274 a592a061-630c-0410-9148-cb99ea01b6c8 --- lib/scripts/legacy_lyxpreview2ppm.py | 69 ++++++---- lib/scripts/lyxpreview2bitmap.py | 181 +++++++++++++++++++++++---- lib/scripts/lyxpreview_tools.py | 6 + src/graphics/PreviewLoader.cpp | 10 +- 4 files changed, 211 insertions(+), 55 deletions(-) diff --git a/lib/scripts/legacy_lyxpreview2ppm.py b/lib/scripts/legacy_lyxpreview2ppm.py index be242cc192..a82c467086 100644 --- a/lib/scripts/legacy_lyxpreview2ppm.py +++ b/lib/scripts/legacy_lyxpreview2ppm.py @@ -56,7 +56,8 @@ import glob, os, pipes, re, string, sys 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 expression. latex_file_re = re.compile("\.tex$") @@ -67,9 +68,10 @@ def usage(prog_name): "\twhere the colors are hexadecimal strings, eg 'faf0e6'"\ % prog_name - -def extract_metrics_info(log_file, metrics_file): - metrics = open(metrics_file, 'w') +# 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]+)") @@ -78,6 +80,7 @@ def extract_metrics_info(log_file, metrics_file): tp_descent = 0.0 success = 0 + results = [] try: for line in open(log_file, 'r').readlines(): match = log_re.match(line) @@ -106,7 +109,7 @@ def extract_metrics_info(log_file, metrics_file): if frac < 0 or frac > 1: frac = 0.5 - metrics.write("Snippet %s %f\n" % (match.group(1), frac)) + results.append((match.group(1), frac)) else: tp_descent = string.atof(match.group(2)) @@ -115,10 +118,13 @@ def extract_metrics_info(log_file, metrics_file): 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('Warning in legacy_extract_metrics_info! Unable to open "%s"' % log_file) warning(`sys.exc_type` + ',' + `sys.exc_value`) - return success + if success == 0: + error("Failed to extract metrics info from %s" % log_file) + + return results def extract_resolution(log_file, dpi): @@ -223,7 +229,7 @@ def crop_files(pnmcrop, basename): copyfileobj(tmp, open(file,"wb"), 1) -def legacy_conversion(argv): +def legacy_conversion(argv, skipMetrics = False): latex_commands = ["latex", "pplatex", "platex", "latex2e"] # Parse and manipulate the command line arguments. if len(argv) == 7: @@ -256,13 +262,13 @@ def legacy_conversion(argv): latex_status, latex_stdout = run_command(latex_call) if latex_status != None: - error("%s failed to compile %s" \ + warning("%s had problems compiling %s" \ % (os.path.basename(latex), latex_file)) - return legacy_conversion_step2(latex_file, dpi, output_format) + return legacy_conversion_step2(latex_file, dpi, output_format, skipMetrics) -def legacy_conversion_step2(latex_file, dpi, output_format): +def legacy_conversion_step2(latex_file, dpi, output_format, skipMetrics = False): # External programs used by the script. path = string.split(os.environ["PATH"], os.pathsep) dvips = find_exe_or_terminate(["dvips"], path) @@ -274,7 +280,7 @@ def legacy_conversion_step2(latex_file, dpi, output_format): ps_file = latex_file_re.sub(".ps", latex_file) pdf_file = latex_file_re.sub(".pdf", latex_file) - dvips_call = '%s -o "%s" "%s"' % (dvips, ps_file, dvi_file) + dvips_call = '%s -i -o "%s" "%s"' % (dvips, ps_file, dvi_file) dvips_failed = False dvips_status, dvips_stdout = run_command(dvips_call) @@ -300,12 +306,6 @@ def legacy_conversion_step2(latex_file, dpi, output_format): gs_ext = "ppm" # Generate the bitmap images - gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \ - '-sOutputFile="%s%%d.%s" ' \ - '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \ - '-r%f "%s"' \ - % (gs, gs_device, latex_file_re.sub("", latex_file), \ - gs_ext, alpha, alpha, resolution, ps_file) if dvips_failed: gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \ @@ -315,18 +315,37 @@ def legacy_conversion_step2(latex_file, dpi, output_format): % (gs, gs_device, latex_file_re.sub("", latex_file), \ gs_ext, alpha, alpha, resolution, pdf_file) - gs_status, gs_stdout = run_command(gs_call) - if gs_status != None: - error("Failed: %s %s" % (os.path.basename(gs), ps_file)) + gs_status, gs_stdout = run_command(gs_call) + if gs_status != None: + error("Failed: %s %s" % (os.path.basename(gs), ps_file)) + else: + gs_call = '%s -dNOPAUSE -dBATCH -dSAFER -sDEVICE=%s ' \ + '-sOutputFile="%s%%d.%s" ' \ + '-dGraphicsAlphaBit=%d -dTextAlphaBits=%d ' \ + '-r%f "%%s"' \ + % (gs, gs_device, latex_file_re.sub("", latex_file), \ + gs_ext, alpha, alpha, resolution) + i = 0 + ps_files = glob.glob("%s.[0-9][0-9][0-9]" % latex_file_re.sub("", latex_file)) + ps_files.sort() + for file in ps_files: + i = i + 1 + gs_status, gs_stdout = run_command(gs_call % (i, file)) + if gs_status != None: + warning("Failed: %s %s" % (os.path.basename(gs), file)) + else: + os.remove(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) + # 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_extract_metrics_info(log_file), metrics_file) return 0 diff --git a/lib/scripts/lyxpreview2bitmap.py b/lib/scripts/lyxpreview2bitmap.py index 517d710f95..8363fab231 100755 --- a/lib/scripts/lyxpreview2bitmap.py +++ b/lib/scripts/lyxpreview2bitmap.py @@ -49,10 +49,11 @@ import glob, os, re, 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. @@ -63,19 +64,21 @@ def usage(prog_name): return "Usage: %s \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: @@ -96,14 +99,17 @@ def extract_metrics_info(dvipng_stdout, metrics_file): 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): @@ -199,7 +205,7 @@ def main(argv): 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)) if latex == "xelatex": @@ -209,37 +215,158 @@ def main(argv): # 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": diff --git a/lib/scripts/lyxpreview_tools.py b/lib/scripts/lyxpreview_tools.py index 5acaec79b9..7d22b6514a 100644 --- a/lib/scripts/lyxpreview_tools.py +++ b/lib/scripts/lyxpreview_tools.py @@ -214,3 +214,9 @@ def mkstemp(): return tempfile.TemporaryFile() else: return TempFile() + +def write_metrics_info(metrics_info, metrics_file): + metrics = open(metrics_file, 'w') + for metric in metrics_info: + metrics.write("Snippet %s %f\n" % metric) + metrics.close() diff --git a/src/graphics/PreviewLoader.cpp b/src/graphics/PreviewLoader.cpp index 80740ac4dc..1bc94b9613 100644 --- a/src/graphics/PreviewLoader.cpp +++ b/src/graphics/PreviewLoader.cpp @@ -674,10 +674,14 @@ void PreviewLoader::Impl::finishedGenerating(pid_t pid, int retval) FileName const & file = it->second; double af = ascent_fractions[metrics_counter]; - PreviewImagePtr ptr(new PreviewImage(parent_, snip, file, af)); - cache_[snip] = ptr; + // Add the image to the cache only if it's actually present + if (file.isReadableFile()) { + PreviewImagePtr ptr(new PreviewImage(parent_, snip, file, af)); + cache_[snip] = ptr; + + newimages.push_back(ptr); + } - newimages.push_back(ptr); } // Remove the item from the list of still-executing processes. -- 2.39.2