MoinMoin: attachment:latex-1.2.3.py of ProcessorMarket

   1 """
   2     MoinMoin - Processor for a LaTeX syntax
   3     @license: GNU GPL, see COPYING for details.
   4 
   5     @copyright: 2002 by Won-kyu Park <wkpark@kldp.org>
   6     @copyright: 2003 by Benny Siegert (added config.latex_header)
   7     Modified:
   8     2004-03-22 R.Bauer replaced config. by config_ and imported AttachFile
   9     2004-04-09 imported patch from Daniel Hottinger (pagestyle{empty}, -E switch of dvips,
  10                input of latex text replaced)
  11     2004-04-09 R.Bauer improvement in speed, because only if the image name is different
  12                a new image must be created
  13     2004-07-31 imported patch from Phil West (imgname = imgname + "_latex")
  14     2004-07-31 R.Bauer improvement to handle multipage postscript files as result of
  15                dvips. The number of pages is read from the resulting postscript file
  16 	       The last extension must be png to show the resulting image files.
  17 	       Therefore we need to move/rename the png files given from convert.
  18     2004-08-16 R.Bauer bug removed if only wiki text is changed
  19                in previous version a single page latex image was not shown again; reported first by Peter Kleiweg.
  20     2004-08-16 R.Bauer added break to the for loop
  21 
  22 
  23 """
  24 
  25 Dependencies = []
  26 
  27 import sys, os, re, sha
  28 from MoinMoin.Page import Page
  29 from MoinMoin.action import AttachFile
  30 from string import split
  31 
  32 config_external_latex = "/usr/bin/latex"
  33 config_external_convert = "/usr/bin/convert"
  34 config_external_dvips = "/usr/bin/dvips"
  35 config_external_mv = "/bin/mv"
  36 config_umask = 022
  37 
  38 config_latex_cache_dir = "./data"
  39 config_latex_cache_url = "./data"
  40 config_latex_header = "\documentclass[a4paper,12pt]{article}\n\pagestyle{empty}"
  41 config_latex_vartmp_dir = "./data/tmp"
  42 
  43 def process(request, formatter, lines):
  44     if not config_latex_cache_dir:
  45     	return
  46     if lines[0].strip() == "#!latex":
  47         del lines[0]
  48 
  49     texstr = '\n'.join(lines).strip()
  50 
  51     imgname = re.sub('\s+', ' ', texstr)
  52     imgname = sha.new(imgname).hexdigest()
  53     imgname = imgname + "_latex"
  54 
  55     attdir = config_latex_cache_dir + "/LaTex/attachments"
  56     atturl = config_latex_cache_url + "/LaTex/attachments"
  57     outpath = "%s/%s.png" % (attdir, imgname)
  58     outurl = "%s/%s.png" % (atturl, imgname)
  59     if not os.path.isdir(attdir):
  60         os.makedirs(attdir, 0775)
  61 
  62     pagename=formatter.page.page_name
  63 
  64     url=AttachFile.getAttachUrl(pagename,imgname+'.png',request)
  65     attach_dir=AttachFile.getAttachDir(pagename,create=1)
  66 
  67 
  68     if not os.path.isfile(attach_dir+'/'+imgname+'.png'):
  69      if not os.path.exists(outpath):
  70         vartmp = config_latex_vartmp_dir
  71         data = open("%s/%s.tex" % (vartmp, imgname), "w")
  72         data.write('%s\n\\begin{document}\n%s\n\\end{document}' % (config_latex_header, texstr))
  73         data.close()
  74 
  75         cmd = "cd %(vartmp)s;%(latex)s %(options)s %(tex)s >/dev/null" % {
  76            "latex": config_external_latex,
  77            "vartmp": vartmp,
  78            "options": '-interaction=batchmode',
  79            "tex": imgname
  80         }
  81 	os.umask(config_umask)
  82         os.system(cmd)
  83         os.system("cd %(vartmp)s; %(dvips)s -E %(imgname)s.dvi -o %(imgname)s.ps >/dev/null" % {
  84             "dvips": config_external_dvips,
  85             "vartmp": vartmp,
  86             "imgname": imgname,
  87         })
  88 
  89 	os.system("%(convert)s -crop 0x0 -density 120x120 %(vartmp)s/%(imgname)s.ps %(outpath)s" % {
  90                "convert": config_external_convert,
  91                "vartmp": vartmp,
  92                "outpath": attach_dir+'/'+imgname+'.png',
  93                "imgname": imgname,
  94         })
  95 
  96 #       How many pages ?
  97 	id = open("%s/%s.ps" % (vartmp, imgname), "r")
  98 	txt=id.readlines()
  99 	id.close()
 100 
 101 	name="%%Pages:"
 102         i=0
 103 	result= -1
 104 	for line in txt:
 105           if (line.count(name) == 1):
 106 	    result=i
 107 	    break
 108 	  i=i+1
 109 
 110 
 111 	n_pages=1
 112         if (result > -1):
 113 	   page=txt[result]
 114            n_pages=int((split(page,name))[1])
 115 
 116 
 117         if n_pages == 1: # this is the old case
 118 	   request.write(formatter.image(src="%s" % url, alt=texstr, align='absmiddle'))
 119 	else: # and this is for more as one page
 120 	  pages=range(n_pages)
 121 	  for i in pages:
 122 	     old_img_name=imgname+'.png.'+str(i)
 123 
 124 	     new_img_name=imgname+'_'+str(i)+'.png'
 125 	     new_url=AttachFile.getAttachUrl(pagename,new_img_name,request)
 126 
 127 	     cmd="%(config_external_mv)s %(old_img_name)s %(new_img_name)s " %{
 128 
 129 	        "config_external_mv": config_external_mv,
 130                 "old_img_name":attach_dir+'/'+old_img_name,
 131 		"new_img_name":attach_dir+'/'+new_img_name
 132 	     }
 133              os.system(cmd)
 134 
 135 
 136 
 137 	     request.write(formatter.image(src="%s" % new_url, alt=texstr, align='absmiddle'))
 138 
 139 
 140         os.system("rm -f %(vartmp)s/%(imgname)s.*" % {
 141             "vartmp": vartmp,
 142             "imgname": imgname,
 143         })
 144 
 145 
 146     else:
 147       request.write(formatter.image(src="%s" % url, alt=texstr, align='absmiddle'))
 148       ## multipage images always created