EPUB output: Add option to not split files on page breaks

src/calibre/ebooks/epub/__init__.py

@@ -122,7 +122,8 @@ help on using this feature.
     structure('prefer_metadata_cover', ['--prefer-metadata-cover'], default=False,
               action='store_true',
               help=_('Use the cover detected from the source file in preference to the specified cover.'))
-    
+    structure('dont_split_on_page_breaks', ['--dont-split-on-page-breaks'], default=False,
+              help=_('Turn off splitting at page breaks. Normally, input files are automatically split at every page break into two files. This gives an output ebook that can be parsed faster and with less resources. However, splitting is slow and if your source file contains a very large number of page breaks, you should turn off splitting on page breaks.'))
     toc = c.add_group('toc', 
         _('''\
 Control the automatic generation of a Table of Contents. If an OPF file is detected

src/calibre/ebooks/epub/split.py

@@ -50,11 +50,15 @@ class Splitter(LoggingInterface):
         self.split_size = 0
         
         # Split on page breaks
-        self.log_info('\tSplitting on page breaks...')
+        if not opts.dont_split_on_page_breaks:
-        if self.path in stylesheet_map:
+            self.log_info('\tSplitting on page breaks...')
-            self.find_page_breaks(stylesheet_map[self.path], root)
+            if self.path in stylesheet_map:
-        self.split_on_page_breaks(root.getroottree())
+                self.find_page_breaks(stylesheet_map[self.path], root)
-        trees = list(self.trees)
+            self.split_on_page_breaks(root.getroottree())
+            trees = list(self.trees)
+        else:
+            self.trees = [root.getroottree()]
+            trees = list(self.trees)
         
         # Split any remaining over-sized trees
         if self.opts.profile.flow_size < sys.maxint:

src/calibre/gui2/dialogs/epub.ui

@@ -77,7 +77,7 @@
      <item>
       <widget class="QStackedWidget" name="stack" >
        <property name="currentIndex" >
-        <number>3</number>
+        <number>0</number>
        </property>
        <widget class="QWidget" name="metadata_page" >
         <layout class="QGridLayout" name="gridLayout_4" >
@@ -89,6 +89,36 @@
               <string>Book Cover</string>
              </property>
              <layout class="QGridLayout" name="_2" >
+              <item row="0" column="0" >
+               <layout class="QHBoxLayout" name="_3" >
+                <item>
+                 <widget class="ImageView" name="cover" >
+                  <property name="text" >
+                   <string/>
+                  </property>
+                  <property name="pixmap" >
+                   <pixmap resource="../images.qrc" >:/images/book.svg</pixmap>
+                  </property>
+                  <property name="scaledContents" >
+                   <bool>true</bool>
+                  </property>
+                  <property name="alignment" >
+                   <set>Qt::AlignCenter</set>
+                  </property>
+                 </widget>
+                </item>
+               </layout>
+              </item>
+              <item row="2" column="0" >
+               <widget class="QCheckBox" name="opt_prefer_metadata_cover" >
+                <property name="text" >
+                 <string>Use cover from &amp;source file</string>
+                </property>
+                <property name="checked" >
+                 <bool>true</bool>
+                </property>
+               </widget>
+              </item>
               <item row="1" column="0" >
                <layout class="QVBoxLayout" name="_4" >
                 <property name="spacing" >
@@ -140,36 +170,6 @@
                 </item>
                </layout>
               </item>
-              <item row="2" column="0" >
-               <widget class="QCheckBox" name="opt_prefer_metadata_cover" >
-                <property name="text" >
-                 <string>Use cover from &amp;source file</string>
-                </property>
-                <property name="checked" >
-                 <bool>true</bool>
-                </property>
-               </widget>
-              </item>
-              <item row="0" column="0" >
-               <layout class="QHBoxLayout" name="_3" >
-                <item>
-                 <widget class="ImageView" name="cover" >
-                  <property name="text" >
-                   <string/>
-                  </property>
-                  <property name="pixmap" >
-                   <pixmap resource="../images.qrc" >:/images/book.svg</pixmap>
-                  </property>
-                  <property name="scaledContents" >
-                   <bool>true</bool>
-                  </property>
-                  <property name="alignment" >
-                   <set>Qt::AlignCenter</set>
-                  </property>
-                 </widget>
-                </item>
-               </layout>
-              </item>
              </layout>
              <zorder>opt_prefer_metadata_cover</zorder>
              <zorder></zorder>
@@ -586,6 +586,13 @@
            </property>
           </widget>
          </item>
+         <item row="5" column="0" >
+          <widget class="QCheckBox" name="opt_dont_split_on_page_breaks" >
+           <property name="text" >
+            <string>Do not &amp;split on page breaks</string>
+           </property>
+          </widget>
+         </item>
         </layout>
        </widget>
        <widget class="QWidget" name="chapterdetection_page" >