DOCX Output: Add support for images

Only basic support, image properties such as float, margins/borders, etc
are still to be implemented

src/calibre/ebooks/docx/names.py

@@ -76,11 +76,11 @@ def barename(x):
 def XML(x):
     return '{%s}%s' % (namespaces['xml'], x)
 
-def expand(name):
-    ns, tag = name.partition(':')[0::2]
-    if ns:
+def expand(name, sep=':'):
+    ns, tag = name.partition(sep)[::2]
+    if ns and tag:
         tag = '{%s}%s' % (namespaces[ns], tag)
-    return tag
+    return tag or ns
 
 def get(x, attr, default=None):
     return x.attrib.get(expand(attr), default)
@@ -104,3 +104,9 @@ def children(elem, *args):
 
 def descendants(elem, *args):
     return XPath('|'.join('descendant::%s' % a for a in args))(elem)
+
+def makeelement(root, tag, append=True, **attrs):
+    ans = root.makeelement(expand(tag), **{expand(k, sep='_'):v for k, v in attrs.iteritems()})
+    if append:
+        root.append(ans)
+    return ans

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

@@ -66,6 +66,9 @@ class TextRun(object):
     def add_break(self, clear='none'):
         self.texts.append((None, clear))
 
+    def add_image(self, drawing):
+        self.texts.append((drawing, None))
+
     def serialize(self, p):
         r = p.makeelement(w('r'))
         p.append(r)
@@ -75,6 +78,8 @@ class TextRun(object):
         for text, preserve_whitespace in self.texts:
             if text is None:
                 r.append(r.makeelement(w('br'), **{w('clear'):preserve_whitespace}))
+            elif hasattr(text, 'xpath'):
+                r.append(text)
             else:
                 t = r.makeelement(w('t'))
                 r.append(t)
@@ -125,6 +130,14 @@ class Block(object):
             self.runs.append(run)
         run.add_break(clear=clear)
 
+    def add_image(self, drawing):
+        if self.runs:
+            run = self.runs[-1]
+        else:
+            run = TextRun(self.styles_manager.create_text_style(self.html_style), self.html_block)
+            self.runs.append(run)
+        run.add_image(drawing)
+
     def serialize(self, body):
         p = body.makeelement(w('p'))
         body.append(p)
@@ -241,7 +254,7 @@ class Convert(object):
             self.blocks[-1].add_text(html_child.tail, stylizer.style(html_child.getparent()), html_parent=html_child.getparent(), is_parent_style=True)
 
     def write(self):
-        dn = {k:v for k, v in namespaces.iteritems() if k in {'w', 'r', 'm', 've', 'o', 'wp', 'w10', 'wne'}}
+        dn = {k:v for k, v in namespaces.iteritems() if k in {'w', 'r', 'm', 've', 'o', 'wp', 'w10', 'wne', 'a', 'pic'}}
         E = ElementMaker(namespace=dn['w'], nsmap=dn)
         self.docx.document = doc = E.document()
         body = E.body()

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

@@ -10,8 +10,13 @@ import os
 import shutil, posixpath
 from collections import namedtuple
 from functools import partial
+from future_builtins import map
+
+from lxml import etree
 
 from calibre.ebooks.oeb.base import urlunquote
+from calibre.ebooks.docx.names import makeelement, namespaces
+from calibre.ebooks.docx.images import pt_to_emu
 from calibre.ptempfile import PersistentTemporaryDirectory
 from calibre.utils.filenames import ascii_filename
 from calibre.utils.magick.draw import identify_data
@@ -26,6 +31,7 @@ class ImagesManager(object):
         self.seen_filenames = set()
         self.document_relationships = document_relationships
         self._tdir = None
+        self.count = 0
 
     @property
     def tdir(self):
@@ -52,8 +58,40 @@ class ImagesManager(object):
             image_rid = self.document_relationships.add_image(image_fname)
             self.images[href] = Image(image_rid, image_fname, width, height, fmt, item)
             item.unload_data_from_memory()
+        drawing = self.create_image_markup(img, stylizer, href)
+        block.add_image(drawing)
         return self.images[href].rid
 
+    def create_image_markup(self, html_img, stylizer, href):
+        # TODO: Handle floating images, margin/padding/border on image, img
+        # inside a link (clickable image)
+        self.count += 1
+        img = self.images[href]
+        name = urlunquote(posixpath.basename(href))
+        width, height = map(pt_to_emu, stylizer.style(html_img).img_size(img.width, img.height))
+
+        root = etree.Element('root', nsmap=namespaces)
+        ans = makeelement(root, 'w:drawing', append=False)
+        inline = makeelement(ans, 'wp:inline', distT='0', distB='0', distR='0', distL='0')
+        makeelement(inline, 'wp:extent', cx=str(width), cy=str(width))
+        makeelement(inline, 'wp:effectExtent', l='0', r='0', t='0', b='0')
+        makeelement(inline, 'wp:docPr', id=str(self.count), name=name, descr=html_img.get('alt') or name)
+        makeelement(makeelement(inline, 'wp:cNvGraphicFramePr'), 'a:graphicFrameLocks', noChangeAspect="1")
+        g = makeelement(inline, 'a:graphic')
+        gd = makeelement(g, 'a:graphicData', uri=namespaces['pic'])
+        pic = makeelement(gd, 'pic:pic')
+        nvPicPr = makeelement(pic, 'pic:nvPicPr')
+        makeelement(nvPicPr, 'pic:cNvPr', id='0', name=name, descr=html_img.get('alt') or name)
+        makeelement(nvPicPr, 'pic:cNvPicPr')
+        bf = makeelement(pic, 'pic:blipFill')
+        makeelement(bf, 'a:blip', r_embed=img.rid)
+        makeelement(makeelement(bf, 'a:stretch'), 'a:fillRect')
+        spPr = makeelement(pic, 'pic:spPr')
+        xfrm = makeelement(spPr, 'a:xfrm')
+        makeelement(xfrm, 'a:off', x='0', y='0'), makeelement(xfrm, 'a:ext', cx=str(width), cy=str(height))
+        makeelement(makeelement(spPr, 'a:prstGeom', prst='rect'), 'a:avLst')
+        return ans
+
     def create_filename(self, href, fmt):
         fname = ascii_filename(urlunquote(posixpath.basename(href)))
         fname = posixpath.splitext(fname)[0]

src/calibre/ebooks/oeb/stylizer.py

@@ -500,6 +500,40 @@ class Style(object):
             self._fontSize = result
         return self._fontSize
 
+    def img_dimension(self, attr, img_size):
+        ans = None
+        parent = self._get_parent()
+        if parent is not None:
+            base = getattr(parent, attr)
+        else:
+            base = getattr(self._profile, attr + '_pts')
+        x = self._style.get(attr)
+        if x is not None:
+            if x == 'auto':
+                ans = base
+            else:
+                x = self._unit_convert(x, base=base)
+                if isinstance(x, (float, int, long)):
+                    ans = x
+        if ans is None:
+            x = self._element.get(attr)
+            if x is not None:
+                x = self._unit_convert(x + 'px', base=base)
+                if isinstance(x, (float, int, long)):
+                    ans = x
+        if ans is None:
+            ans = self._unit_convert(str(img_size) + 'px', base=base)
+        maa = self._style.get('max-' + attr)
+        if maa is not None:
+            x = self._unit_convert(maa, base=base)
+            if isinstance(x, (int, float, long)) and (ans is None or x < ans):
+                ans = x
+        return ans
+
+    def img_size(self, width, height):
+        ' Return the final size of an <img> given that it points to an imafe of size widthxheight '
+        return self.img_dimension('width', width), self.img_dimension('height', height)
+
     @property
     def width(self):
         if self._width is None: