HTMLZ Output: Add option to use the book title as the filename for the html file inside the archive

src/calibre/ebooks/conversion/plugins/htmlz_output.py

@@ -37,6 +37,11 @@ class HTMLZOutput(OutputFormatPlugin):
                    'external: Use an external CSS file that is linked in the document.\n'
                    'inline: Place the CSS in the head section of the document.'
             )),
+        OptionRecommendation(name='htmlz_title_filename',
+            recommended_value=False, level=OptionRecommendation.LOW,
+            help=_('If set this option causes the file name of the html file'
+                ' inside the htmlz archive to be based on the book title.')
+            ),
     ])
 
     def convert(self, oeb_book, output_path, input_plugin, opts, log):
@@ -44,6 +49,7 @@ class HTMLZOutput(OutputFormatPlugin):
         from calibre.ebooks.oeb.base import OEB_IMAGES, SVG_MIME
         from calibre.ebooks.metadata.opf2 import OPF, metadata_to_opf
         from calibre.utils.zipfile import ZipFile
+        from calibre.utils.filenames import ascii_filename
 
         # HTML
         if opts.htmlz_css_type == 'inline':
@@ -59,7 +65,10 @@ class HTMLZOutput(OutputFormatPlugin):
             htmlizer = OEB2HTMLizer(log)
             html = htmlizer.oeb2html(oeb_book, opts)
 
-            with open(os.path.join(tdir, u'index.html'), 'wb') as tf:
+            fname = u'index'
+            if opts.htmlz_title_filename:
+                fname = ascii_filename(unicode(oeb_book.metadata.title[0]))
+            with open(os.path.join(tdir, fname+u'.html'), 'wb') as tf:
                 tf.write(html)
 
             # CSS

src/calibre/gui2/convert/htmlz_output.py

@@ -17,7 +17,8 @@ class PluginWidget(Widget, Ui_Form):
     ICON = I('mimetypes/html.png')
 
     def __init__(self, parent, get_option, get_help, db=None, book_id=None):
-        Widget.__init__(self, parent, ['htmlz_css_type', 'htmlz_class_style'])
+        Widget.__init__(self, parent, ['htmlz_css_type', 'htmlz_class_style',
+            'htmlz_title_filename'])
         self.db, self.book_id = db, book_id
         for x in get_option('htmlz_css_type').option.choices:
             self.opt_htmlz_css_type.addItem(x)

src/calibre/gui2/convert/htmlz_output.ui

@@ -14,7 +14,7 @@
    <string>Form</string>
   </property>
   <layout class="QGridLayout" name="gridLayout">
-   <item row="2" column="0">
+   <item row="3" column="0">
     <spacer name="verticalSpacer">
      <property name="orientation">
       <enum>Qt::Vertical</enum>
@@ -27,6 +27,9 @@
      </property>
     </spacer>
    </item>
+   <item row="1" column="1">
+    <widget class="QComboBox" name="opt_htmlz_class_style"/>
+   </item>
    <item row="0" column="0">
     <widget class="QLabel" name="label">
      <property name="text">
@@ -51,8 +54,12 @@
      </property>
     </widget>
    </item>
-   <item row="1" column="1">
-    <widget class="QComboBox" name="opt_htmlz_class_style"/>
+   <item row="2" column="0" colspan="2">
+    <widget class="QCheckBox" name="opt_htmlz_title_filename">
+     <property name="text">
+      <string>Use book &amp;title as the filename for the HTML file inside the archive</string>
+     </property>
+    </widget>
    </item>
   </layout>
  </widget>