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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
LaTeX-defined image support for Lore documents.
"""
import os, tempfile
from xml.dom import minidom as dom
from twisted.web import domhelpers
import latex, tree, lint, default
class MathLatexSpitter(latex.LatexSpitter):
start_html = '\\documentclass{amsart}\n'
def visitNode_div_latexmacros(self, node):
self.writer(domhelpers.getNodeText(node))
def visitNode_span_latexformula(self, node):
self.writer('\[')
self.writer(domhelpers.getNodeText(node))
self.writer('\]')
def formulaeToImages(document, dir, _system=os.system):
# gather all macros
macros = ''
for node in domhelpers.findElementsWithAttribute(document, 'class',
'latexmacros'):
macros += domhelpers.getNodeText(node)
node.parentNode.removeChild(node)
i = 0
for node in domhelpers.findElementsWithAttribute(document, 'class',
'latexformula'):
latexText='''\\documentclass[12pt]{amsart}%s
\\begin{document}\[%s\]
\\end{document}''' % (macros, domhelpers.getNodeText(node))
# This file really should be cleaned up by this function, or placed
# somewhere such that the calling code can find it and clean it up.
file = tempfile.mktemp()
f = open(file+'.tex', 'w')
f.write(latexText)
f.close()
_system('latex %s.tex' % file)
_system('dvips %s.dvi -o %s.ps' % (os.path.basename(file), file))
baseimgname = 'latexformula%d.png' % i
imgname = os.path.join(dir, baseimgname)
i += 1
_system('pstoimg -type png -crop a -trans -interlace -out '
'%s %s.ps' % (imgname, file))
newNode = dom.parseString(
'<span><br /><img src="%s" /><br /></span>' % (
baseimgname,)).documentElement
node.parentNode.replaceChild(newNode, node)
def doFile(fn, docsdir, ext, url, templ, linkrel='', d=None):
d = d or {}
doc = tree.parseFileAndReport(fn)
formulaeToImages(doc, os.path.dirname(fn))
cn = templ.cloneNode(1)
tree.munge(doc, cn, linkrel, docsdir, fn, ext, url, d)
cn.writexml(open(os.path.splitext(fn)[0]+ext, 'wb'))
class ProcessingFunctionFactory(default.ProcessingFunctionFactory):
latexSpitters = {None: MathLatexSpitter}
def getDoFile(self):
return doFile
def getLintChecker(self):
checker = lint.getDefaultChecker()
checker.allowedClasses = checker.allowedClasses.copy()
oldDiv = checker.allowedClasses['div']
oldSpan = checker.allowedClasses['span']
checker.allowedClasses['div'] = lambda x:oldDiv(x) or x=='latexmacros'
checker.allowedClasses['span'] = (lambda x:oldSpan(x) or
x=='latexformula')
return checker
factory = ProcessingFunctionFactory()
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