214 lines
7.9 KiB
Python
214 lines
7.9 KiB
Python
#FORMAT python
|
|
#!/usr/bin/python
|
|
# -*- coding: iso-8859-15 -*-
|
|
|
|
"""
|
|
New latex formatter using dvipng and tempfile
|
|
|
|
Author: JohannesBerg <johannes@sipsolutions.net>
|
|
|
|
This parser (and the corresponding macro) was tested with Python 2.3.4 and
|
|
* Debian Linux with out-of-the-box tetex-bin and dvipng packages installed
|
|
* Windows XP (not by me)
|
|
|
|
In the parser, you can add stuff to the prologue by writing
|
|
%%end-prologue%%
|
|
somewhere in the document, before that write stuff like \\usepackage and after it put
|
|
the actual latex display code.
|
|
"""
|
|
|
|
Dependencies = []
|
|
|
|
import sha, os, tempfile, shutil, re
|
|
from MoinMoin.action import AttachFile
|
|
from MoinMoin.Page import Page
|
|
|
|
latex_template = r'''
|
|
\documentclass[12pt]{article}
|
|
\pagestyle{empty}
|
|
%(prologue)s
|
|
\begin{document}
|
|
%(raw)s
|
|
\end{document}
|
|
'''
|
|
|
|
max_pages = 10
|
|
MAX_RUN_TIME = 5 # seconds
|
|
|
|
latex = "latex" # edit full path here, e.g. reslimit = "C:\\path\\to\\latex.exe"
|
|
dvipng = "dvipng" # edit full path here (or reslimit = r'C:\path\to\latex.exe')
|
|
|
|
# last arg must have %s in it!
|
|
latex_args = ("--interaction=nonstopmode", "%s.tex")
|
|
|
|
# last arg must have %s in it!
|
|
dvipng_args = ("-bgTransparent", "-Ttight", "--noghostscript", "-l%s" % max_pages, "%s.dvi")
|
|
|
|
# this is formatted with hexdigest(texcode),
|
|
# page number and extension are appended by
|
|
# the tools
|
|
latex_name_template = "latex_%s_p"
|
|
|
|
# keep this up-to-date, also with max_pages!!
|
|
latex_attachment = re.compile((latex_name_template+'%s%s') % (r'[0-9a-fA-F]{40}', r'[0-9]{1,2}', r'\.png'))
|
|
|
|
anchor = re.compile(r'^%%anchor:[ ]*([a-zA-Z0-9_-]+)$', re.MULTILINE | re.IGNORECASE)
|
|
# the anchor re must start with a % sign to be ignored by latex as a comment!
|
|
end_prologue = '%%end-prologue%%'
|
|
|
|
def call_command_in_dir_NT(app, args, targetdir):
|
|
reslimit = "runlimit.exe" # edit full path here
|
|
os.environ['openin_any'] = 'p'
|
|
os.environ['openout_any'] = 'p'
|
|
os.environ['shell_escape'] = 'f'
|
|
stdouterr = os.popen('%s %d "%s" %s %s < NUL' % (reslimit, MAX_RUN_TIME, targetdir, app, ' '.join(args)), 'r')
|
|
output = ''.join(stdouterr.readlines())
|
|
err = stdouterr.close()
|
|
if not err is None:
|
|
return ' error! exitcode was %d, transscript follows:\n\n%s' % (err,output)
|
|
return None
|
|
|
|
def call_command_in_dir_unix(app, args, targetdir):
|
|
# this is the unix implementation
|
|
(r,w) = os.pipe()
|
|
pid = os.fork()
|
|
if pid == -1:
|
|
return 'could not fork'
|
|
if pid == 0:
|
|
# child
|
|
os.close(r)
|
|
os.dup2(os.open("/dev/null", os.O_WRONLY), 0)
|
|
os.dup2(w, 1)
|
|
os.dup2(w, 2)
|
|
os.chdir(targetdir)
|
|
os.environ['openin_any'] = 'p'
|
|
os.environ['openout_any'] = 'p'
|
|
os.environ['shell_escape'] = 'f'
|
|
import resource
|
|
resource.setrlimit(resource.RLIMIT_CPU,
|
|
(MAX_RUN_TIME * 1000, MAX_RUN_TIME * 1000)) # docs say this is seconds, but it is msecs on my system.
|
|
os.execvp(app, [app] + list(args))
|
|
print "failed to exec()",app
|
|
os._exit(2)
|
|
else:
|
|
# parent
|
|
os.close(w)
|
|
r = os.fdopen(r,"r")
|
|
output = ''.join(r.readlines())
|
|
(npid, exi) = os.waitpid(pid, 0)
|
|
r.close()
|
|
sig = exi & 0xFF
|
|
stat = exi >> 8
|
|
if stat != 0 or sig != 0:
|
|
return ' error! exitcode was %d (signal %d), transscript follows:\n\n%s' % (stat,sig,output)
|
|
return None
|
|
# notreached
|
|
|
|
if os.name == 'nt':
|
|
call_command_in_dir = call_command_in_dir_NT
|
|
else:
|
|
call_command_in_dir = call_command_in_dir_unix
|
|
|
|
|
|
class Parser:
|
|
extensions = ['.tex']
|
|
def __init__ (self, raw, request, **kw):
|
|
self.raw = raw
|
|
if len(self.raw)>0 and self.raw[0] == '#':
|
|
self.raw[0] = '%'
|
|
self.request = request
|
|
self.exclude = []
|
|
if not hasattr(request, "latex_cleanup_done"):
|
|
request.latex_cleanup_done = {}
|
|
|
|
def cleanup(self, pagename):
|
|
attachdir = AttachFile.getAttachDir(self.request, pagename, create=1)
|
|
for f in os.listdir(attachdir):
|
|
if not latex_attachment.match(f) is None:
|
|
os.remove("%s/%s" % (attachdir, f))
|
|
|
|
def _internal_format(self, formatter, text):
|
|
tmp = text.split(end_prologue, 1)
|
|
if len(tmp) == 2:
|
|
prologue,tex=tmp
|
|
else:
|
|
prologue = ''
|
|
tex = tmp[0]
|
|
if callable(getattr(formatter, 'johill_sidecall_emit_latex', None)):
|
|
return formatter.johill_sidecall_emit_latex(tex)
|
|
return self.get(formatter, tex, prologue, True)
|
|
|
|
def format(self, formatter):
|
|
self.request.write(self._internal_format(formatter, self.raw))
|
|
|
|
def get(self, formatter, inputtex, prologue, para=False):
|
|
if not self.request.latex_cleanup_done.has_key(formatter.page.page_name):
|
|
self.request.latex_cleanup_done[formatter.page.page_name] = True
|
|
self.cleanup(formatter.page.page_name)
|
|
|
|
if len(inputtex) == 0: return ''
|
|
|
|
if callable(getattr(formatter, 'johill_sidecall_emit_latex', None)):
|
|
return formatter.johill_sidecall_emit_latex(inputtex)
|
|
|
|
extra_preamble = ''
|
|
preamble_page = self.request.pragma.get('latex_preamble', None)
|
|
if preamble_page is not None:
|
|
extra_preamble = Page(self.request, preamble_page).get_raw_body()
|
|
extra_preamble = re.sub(re.compile('^#'), '%', extra_preamble)
|
|
|
|
tex = latex_template % { 'raw': inputtex, 'prologue': extra_preamble + prologue }
|
|
enctex = tex.encode('utf-8')
|
|
fn = latex_name_template % sha.new(enctex).hexdigest()
|
|
|
|
attachdir = AttachFile.getAttachDir(self.request, formatter.page.page_name, create=1)
|
|
dst = "%s/%s%%d.png" % (attachdir, fn)
|
|
if not os.access(dst % 1, os.R_OK):
|
|
tmpdir = tempfile.mkdtemp()
|
|
try:
|
|
data = open("%s/%s.tex" % (tmpdir, fn), "w")
|
|
data.write(enctex)
|
|
data.close()
|
|
args = list(latex_args)
|
|
args[-1] = args[-1] % fn
|
|
res = call_command_in_dir(latex, args, tmpdir)
|
|
if not res is None:
|
|
return formatter.preformatted(1)+formatter.text('latex'+res)+formatter.preformatted(0)
|
|
args = list(dvipng_args)
|
|
args[-1] = args[-1] % fn
|
|
res = call_command_in_dir(dvipng, args, tmpdir)
|
|
if not res is None:
|
|
return formatter.preformatted(1)+formatter.text('dvipng'+res)+formatter.preformatted(0)
|
|
|
|
page = 1
|
|
while os.access("%s/%s%d.png" % (tmpdir, fn, page), os.R_OK):
|
|
shutil.copyfile ("%s/%s%d.png" % (tmpdir, fn, page), dst % page)
|
|
page += 1
|
|
|
|
finally:
|
|
for root,dirs,files in os.walk(tmpdir, topdown=False):
|
|
for name in files:
|
|
os.remove(os.path.join(root,name))
|
|
for name in dirs:
|
|
os.rmdir(os.path.join(root,name))
|
|
os.rmdir(tmpdir)
|
|
|
|
result = ""
|
|
page = 1
|
|
loop = False
|
|
for match in anchor.finditer(inputtex):
|
|
result += formatter.anchordef(match.group(1))
|
|
for match in anchor.finditer(prologue):
|
|
result += formatter.anchordef(match.group(1))
|
|
while os.access(dst % page, os.R_OK):
|
|
url = AttachFile.getAttachUrl(formatter.page.page_name, fn+"%d.png" % page, self.request)
|
|
if loop:
|
|
result += formatter.linebreak(0)+formatter.linebreak(0)
|
|
if para:
|
|
result += formatter.paragraph(1)
|
|
result += formatter.image(src="%s" % url, alt=inputtex, title=inputtex, align="absmiddle")
|
|
if para:
|
|
result += formatter.paragraph(0)
|
|
page += 1
|
|
loop = True
|
|
return result
|