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PDF Output: Add support for converting documents with math typesetting, as described here: http://manual.calibre-ebook.com/typesetting_math.html

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Kovid Goyal 2013-02-12 11:45:02 +05:30
parent d9b75ef819
commit ab9b0e8380
1 changed files with 18 additions and 0 deletions
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18
src/calibre/ebooks/pdf/render/from_html.py
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@ -16,6 +16,7 @@ from PyQt4.Qt import (QObject, QPainter, Qt, QSize, QString, QTimer,
from PyQt4.QtWebKit import QWebView, QWebPage, QWebSettings from PyQt4.QtWebKit import QWebView, QWebPage, QWebSettings
from calibre import fit_image from calibre import fit_image
from calibre.constants import iswindows
from calibre.ebooks.oeb.display.webview import load_html from calibre.ebooks.oeb.display.webview import load_html
from calibre.ebooks.pdf.render.common import (inch, cm, mm, pica, cicero, from calibre.ebooks.pdf.render.common import (inch, cm, mm, pica, cicero,
didot, PAPER_SIZES) didot, PAPER_SIZES)
@ -251,16 +252,33 @@ class PDFWriter(QObject):
def current_page_num(self): def current_page_num(self):
return self.doc.current_page_num return self.doc.current_page_num
def load_mathjax(self):
evaljs = self.view.page().mainFrame().evaluateJavaScript
mjpath = P(u'viewer/mathjax').replace(os.sep, '/')
if iswindows:
mjpath = u'/' + mjpath
if evaljs('''
window.mathjax.base = %s;
mathjax.check_for_math(); mathjax.math_present
'''%(json.dumps(mjpath, ensure_ascii=False))).toBool():
self.log.debug('Math present, loading MathJax')
while not evaljs('mathjax.math_loaded').toBool():
self.loop.processEvents(self.loop.ExcludeUserInputEvents)
evaljs('document.getElementById("MathJax_Message").style.display="none";')
def do_paged_render(self): def do_paged_render(self):
if self.paged_js is None: if self.paged_js is None:
from calibre.utils.resources import compiled_coffeescript from calibre.utils.resources import compiled_coffeescript
self.paged_js = compiled_coffeescript('ebooks.oeb.display.utils') self.paged_js = compiled_coffeescript('ebooks.oeb.display.utils')
self.paged_js += compiled_coffeescript('ebooks.oeb.display.indexing') self.paged_js += compiled_coffeescript('ebooks.oeb.display.indexing')
self.paged_js += compiled_coffeescript('ebooks.oeb.display.paged') self.paged_js += compiled_coffeescript('ebooks.oeb.display.paged')
self.paged_js += compiled_coffeescript('ebooks.oeb.display.mathjax')
self.view.page().mainFrame().addToJavaScriptWindowObject("py_bridge", self) self.view.page().mainFrame().addToJavaScriptWindowObject("py_bridge", self)
evaljs = self.view.page().mainFrame().evaluateJavaScript evaljs = self.view.page().mainFrame().evaluateJavaScript
evaljs(self.paged_js) evaljs(self.paged_js)
self.load_mathjax()
evaljs(''' evaljs('''
py_bridge.__defineGetter__('value', function() { py_bridge.__defineGetter__('value', function() {
return JSON.parse(this._pass_json_value); return JSON.parse(this._pass_json_value);