mirror of
https://git.lyx.org/repos/lyx.git
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359 lines
11 KiB
Python
359 lines
11 KiB
Python
# file lyxpreview_tools.py
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# This file is part of LyX, the document processor.
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# Licence details can be found in the file COPYING.
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# author Angus Leeming
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# Full author contact details are available in file CREDITS
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# and with much help testing the code under Windows from
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# Paul A. Rubin, rubin@msu.edu.
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# A repository of the following functions, used by the lyxpreview2xyz scripts.
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# copyfileobj, error, find_exe, find_exe_or_terminate, make_texcolor,
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# progress, run_command, run_latex, warning
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# Requires python 2.4 or later (subprocess module).
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import os, re, subprocess, sys, tempfile
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# Control the output to stdout
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debug = False
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verbose = False
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# Known flavors of latex and bibtex
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bibtex_commands = ("bibtex", "bibtex8", "biber")
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latex_commands = ("latex", "pplatex", "platex", "latex2e")
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pdflatex_commands = ("pdflatex", "xelatex", "lualatex")
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# Pre-compiled regular expressions
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latex_file_re = re.compile(r"\.tex$")
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# PATH and PATHEXT environment variables
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path = os.environ["PATH"].split(os.pathsep)
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extlist = ['']
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if "PATHEXT" in os.environ:
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extlist += os.environ["PATHEXT"].split(os.pathsep)
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extlist.append('.py')
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use_win32_modules = 0
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if os.name == "nt":
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use_win32_modules = 1
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try:
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import pywintypes
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import win32con
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import win32event
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import win32file
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import win32pipe
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import win32process
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import win32security
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import winerror
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except:
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sys.stderr.write("Consider installing the PyWin extension modules " \
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"if you're irritated by windows appearing briefly.\n")
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use_win32_modules = 0
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def progress(message):
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global verbose
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if verbose:
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sys.stdout.write("Progress: %s\n" % message)
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def warning(message):
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sys.stderr.write("Warning: %s\n" % message)
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def error(message):
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sys.stderr.write("Error: %s\n" % message)
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sys.exit(1)
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def make_texcolor(hexcolor, graphics):
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# Test that the input string contains 6 hexadecimal chars.
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hexcolor_re = re.compile(b"^[0-9a-fA-F]{6}$")
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if not hexcolor_re.match(hexcolor):
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error("Cannot convert color '%s'" % hexcolor)
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red = float(int(hexcolor[0:2], 16)) / 255.0
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green = float(int(hexcolor[2:4], 16)) / 255.0
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blue = float(int(hexcolor[4:6], 16)) / 255.0
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if graphics:
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return b"%f,%f,%f" % (red, green, blue)
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else:
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return b"rgb %f %f %f" % (red, green, blue)
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def find_exe(candidates):
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global extlist, path
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for command in candidates:
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prog = command.split()[0]
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for directory in path:
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for ext in extlist:
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full_path = os.path.join(directory, prog + ext)
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if os.access(full_path, os.X_OK):
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# The thing is in the PATH already (or we wouldn't
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# have found it). Return just the basename to avoid
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# problems when the path to the executable contains
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# spaces.
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if full_path.lower().endswith('.py'):
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return command.replace(prog, '"%s" "%s"'
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% (sys.executable, full_path))
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return command
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return None
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def find_exe_or_terminate(candidates):
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exe = find_exe(candidates)
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if exe == None:
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error("Unable to find executable from '%s'" % " ".join(candidates))
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return exe
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def run_command_popen(cmd, stderr2stdout):
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if os.name == 'nt':
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unix = False
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else:
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unix = True
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if stderr2stdout:
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pipe = subprocess.Popen(cmd, shell=unix, close_fds=unix, stdin=subprocess.PIPE, \
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stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True)
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cmd_stdout = pipe.communicate()[0]
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else:
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pipe = subprocess.Popen(cmd, shell=unix, close_fds=unix, stdin=subprocess.PIPE, \
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stdout=subprocess.PIPE, universal_newlines=True)
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(cmd_stdout, cmd_stderr) = pipe.communicate()
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if cmd_stderr:
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sys.stderr.write(cmd_stderr)
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cmd_status = pipe.returncode
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global debug
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if debug:
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sys.stdout.write(cmd_stdout)
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return cmd_status, cmd_stdout
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def run_command_win32(cmd):
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sa = win32security.SECURITY_ATTRIBUTES()
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sa.bInheritHandle = True
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stdout_r, stdout_w = win32pipe.CreatePipe(sa, 0)
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si = win32process.STARTUPINFO()
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si.dwFlags = (win32process.STARTF_USESTDHANDLES
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| win32process.STARTF_USESHOWWINDOW)
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si.wShowWindow = win32con.SW_HIDE
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si.hStdOutput = stdout_w
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process, thread, pid, tid = \
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win32process.CreateProcess(None, cmd, None, None, True,
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0, None, None, si)
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if process == None:
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return -1, ""
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# Must close the write handle in this process, or ReadFile will hang.
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stdout_w.Close()
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# Read the pipe until we get an error (including ERROR_BROKEN_PIPE,
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# which is okay because it happens when child process ends).
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data = ""
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error = 0
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while 1:
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try:
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hr, buffer = win32file.ReadFile(stdout_r, 4096)
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if hr != winerror.ERROR_IO_PENDING:
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data = data + str(buffer)
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except pywintypes.error as e:
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if e.args[0] != winerror.ERROR_BROKEN_PIPE:
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error = 1
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break
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if error:
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return -2, ""
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# Everything is okay --- the called process has closed the pipe.
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# For safety, check that the process ended, then pick up its exit code.
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win32event.WaitForSingleObject(process, win32event.INFINITE)
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if win32process.GetExitCodeProcess(process):
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return -3, ""
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global debug
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if debug:
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sys.stdout.write(data)
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return 0, data
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def run_command(cmd, stderr2stdout = True):
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progress("Running %s" % cmd)
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if use_win32_modules:
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return run_command_win32(cmd)
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else:
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return run_command_popen(cmd, stderr2stdout)
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def copyfileobj(fsrc, fdst, rewind=0, length=16*1024):
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"""copy data from file-like object fsrc to file-like object fdst"""
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if rewind:
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fsrc.flush()
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fsrc.seek(0)
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while 1:
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buf = fsrc.read(length)
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if not buf:
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break
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fdst.write(buf)
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def write_metrics_info(metrics_info, metrics_file):
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metrics = open(metrics_file, 'w')
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for metric in metrics_info:
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metrics.write("Snippet %s %f\n" % metric)
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metrics.close()
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# Reads a .tex files and create an identical file but only with
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# pages whose index is in pages_to_keep
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def filter_pages(source_path, destination_path, pages_to_keep):
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def_re = re.compile(b"(\\\\newcommandx|\\\\renewcommandx|\\\\global\\\\long\\\\def)(\\[a-zA-Z]+)(.+)")
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source_file = open(source_path, "rb")
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destination_file = open(destination_path, "wb")
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page_index = 0
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skip_page = False
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macros = []
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for line in source_file:
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# We found a new page
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if line.startswith(b"\\begin{preview}"):
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page_index += 1
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# If the page index isn't in pages_to_keep we don't copy it
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skip_page = page_index not in pages_to_keep
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if not skip_page:
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match = def_re.match(line)
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if match != None:
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definecmd = match.group(1)
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macroname = match.group(2)
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if not macroname in macros:
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macros.append(macroname)
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if definecmd == b"\\renewcommandx":
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line = line.replace(definecmd, b"\\newcommandx")
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destination_file.write(line)
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# End of a page, we reset the skip_page bool
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if line.startswith(b"\\end{preview}"):
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skip_page = False
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destination_file.close()
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source_file.close()
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# Joins two metrics list, that is a list of tuple (page_index, metric)
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# new_page_indexes contains the original page number of the pages in new_metrics
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# e.g. new_page_indexes[3] == 14 means that the 4th item in new_metrics is the 15th in the original counting
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# original_bitmap and destination_bitmap are file name models used to rename the new files
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# e.g. image_new%d.png and image_%d.png
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def join_metrics_and_rename(original_metrics, new_metrics, new_page_indexes, original_bitmap, destination_bitmap):
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legacy_index = 0
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for (index, metric) in new_metrics:
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# If the file exists we rename it
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if os.path.isfile(original_bitmap % (index)):
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os.rename(original_bitmap % (index), destination_bitmap % new_page_indexes[index-1])
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# Extract the original page index
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index = new_page_indexes[index-1]
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# Goes through the array until the end is reached or the correct index is found
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while legacy_index < len(original_metrics) and original_metrics[legacy_index][0] < index:
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legacy_index += 1
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# Add or update the metric for this page
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if legacy_index < len(original_metrics) and original_metrics[legacy_index][0] == index:
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original_metrics[legacy_index] = (index, metric)
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else:
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original_metrics.insert(legacy_index, (index, metric))
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def run_latex(latex, latex_file, bibtex = None):
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# Run latex
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latex_status, latex_stdout = run_tex(latex, latex_file)
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if bibtex is None:
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return latex_status, latex_stdout
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# The aux and log output file names
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aux_file = latex_file_re.sub(".aux", latex_file)
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log_file = latex_file_re.sub(".log", latex_file)
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# Run bibtex/latex if necessary
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progress("Checking if a bibtex run is necessary")
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if string_in_file(r"\bibdata", aux_file):
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bibtex_status, bibtex_stdout = run_tex(bibtex, aux_file)
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latex_status, latex_stdout = run_tex(latex, latex_file)
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# Rerun latex if necessary
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progress("Checking if a latex rerun is necessary")
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if string_in_file("Warning: (Citation|Reference)", log_file):
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latex_status, latex_stdout = run_tex(latex, latex_file)
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return latex_status, latex_stdout
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def run_tex(tex, tex_file):
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tex_call = f'{tex} "{tex_file}"'
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tex_status, tex_stdout = run_command(tex_call)
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if tex_status:
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progress("Warning: %s had problems compiling %s" \
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% (os.path.basename(tex), tex_file))
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return tex_status, tex_stdout
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def string_in_file(string, infile):
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if not os.path.isfile(infile):
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return False
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string_re = re.compile(string.encode())
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f = open(infile, 'rb')
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for line in f.readlines():
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if string_re.search(line):
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f.close()
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return True
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f.close()
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return False
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# Returns a list of indexes of pages giving errors extracted from the latex log
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def check_latex_log(log_file):
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error_re = re.compile(b"^! ")
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snippet_re = re.compile(b"^Preview: Snippet ")
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data_re = re.compile(b"([0-9]+) ([0-9]+) ([0-9]+) ([0-9]+)")
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found_error = False
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error_pages = []
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try:
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for line in open(log_file, 'rb').readlines():
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if not found_error:
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match = error_re.match(line)
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if match != None:
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found_error = True
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continue
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else:
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match = snippet_re.match(line)
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if match == None:
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continue
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found_error = False
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match = data_re.search(line)
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if match == None:
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error(f"Unexpected data in {log_file}\n{line}")
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error_pages.append(int(match.group(1)))
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except:
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warning('check_latex_log: Unable to open "%s"' % log_file)
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warning(repr(sys.exc_info()[0]) + ',' + repr(sys.exc_info()[1]))
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return error_pages
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