DOCX Output: Plumbing for font embedding

src/calibre/ebooks/docx/writer/container.py

@@ -14,7 +14,7 @@ from lxml.builder import ElementMaker
 
 from calibre import guess_type
 from calibre.constants import numeric_version, __appname__
-from calibre.ebooks.docx.names import namespaces, STYLES, WEB_SETTINGS, IMAGES
+from calibre.ebooks.docx.names import namespaces, STYLES, WEB_SETTINGS, IMAGES, FONTS
 from calibre.ebooks.metadata import authors_to_string
 from calibre.ebooks.metadata.opf2 import OPF as ReadOPF
 from calibre.ebooks.oeb.base import OPF, OPF2_NS
@@ -54,6 +54,7 @@ class DocumentRelationships(object):
         for typ, target in {
                 STYLES: 'styles.xml',
                 WEB_SETTINGS: 'webSettings.xml',
+                FONTS: 'fontTable.xml',
         }.iteritems():
             self.add_relationship(target, typ)
 
@@ -85,6 +86,9 @@ class DOCX(object):
     def __init__(self, opts, log):
         self.opts, self.log = opts, log
         self.document_relationships = DocumentRelationships()
+        self.font_table = etree.Element('{%s}fonts' % namespaces['w'], nsmap={k:namespaces[k] for k in 'wr'})
+        E = ElementMaker(namespace=namespaces['pr'], nsmap={None:namespaces['pr']})
+        self.embedded_fonts = E.Relationships()
 
     # Boilerplate {{{
     @property
@@ -181,7 +185,9 @@ class DOCX(object):
             zf.writestr('word/webSettings.xml', self.websettings)
             zf.writestr('word/document.xml', xml2str(self.document))
             zf.writestr('word/styles.xml', xml2str(self.styles))
+            zf.writestr('word/fontTable.xml', xml2str(self.font_table))
             zf.writestr('word/_rels/document.xml.rels', self.document_relationships.serialize())
+            zf.writestr('word/_rels/fontTable.xml.rels', xml2str(self.embedded_fonts))
             for fname, data_getter in self.images.iteritems():
                 zf.writestr(fname, data_getter())
 

src/calibre/ebooks/docx/writer/fonts.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python2
+# vim:fileencoding=utf-8
+from __future__ import (unicode_literals, division, absolute_import,
+                        print_function)
+
+__license__ = 'GPL v3'
+__copyright__ = '2015, Kovid Goyal <kovid at kovidgoyal.net>'
+
+from calibre.ebooks.docx.names import makeelement
+
+class FontsManager(object):
+
+    def __init__(self, oeb):
+        self.oeb, self.log = oeb, oeb.log
+
+    def serialize(self, text_styles, fonts, embed_relationships):
+        font_families, seen = set(), set()
+        for ts in text_styles:
+            if ts.font_family:
+                lf = ts.font_family.lower()
+                if lf not in seen:
+                    seen.add(lf)
+                    font_families.add(ts.font_family)
+        for family in sorted(font_families):
+            makeelement(fonts, 'w:font', w_name=family)
+

src/calibre/ebooks/docx/writer/from_html.py

@@ -14,6 +14,7 @@ from lxml.builder import ElementMaker
 from calibre.ebooks.docx.names import namespaces
 from calibre.ebooks.docx.writer.styles import w, StylesManager
 from calibre.ebooks.docx.writer.images import ImagesManager
+from calibre.ebooks.docx.writer.fonts import FontsManager
 from calibre.ebooks.oeb.stylizer import Stylizer as Sz, Style as St
 from calibre.ebooks.oeb.base import XPath, barename
 from calibre.ebooks.pdf.render.common import PAPER_SIZES
@@ -170,6 +171,7 @@ class Convert(object):
 
         self.styles_manager = StylesManager()
         self.images_manager = ImagesManager(self.oeb, self.docx.document_relationships)
+        self.fonts_manager = FontsManager(self.oeb)
 
         for item in self.oeb.spine:
             self.process_item(item)
@@ -296,3 +298,4 @@ class Convert(object):
         self.docx.images = {}
         self.styles_manager.serialize(self.docx.styles)
         self.images_manager.serialize(self.docx.images)
+        self.fonts_manager.serialize(self.styles_manager.text_styles, self.docx.font_table, self.docx.embedded_fonts)