Comments editor: Add a button to easily insert separators (i.e. <hr> tags) when editing comments

imgsrc/format-text-hr.svg

@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="136.53334"
+   height="136.53334"
+   viewBox="0 0 128 128"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.92.1 r"
+   sodipodi:docname="format-text-hr.svg">
+  <defs
+     id="defs4" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="15.839192"
+     inkscape:cx="50.735407"
+     inkscape:cy="62.616635"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     inkscape:window-width="3840"
+     inkscape:window-height="2128"
+     inkscape:window-x="0"
+     inkscape:window-y="32"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Kovid Goyal</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:rights>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:rights>
+        <dc:publisher>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:publisher>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/by-sa/3.0/" />
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/3.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-924.36216)">
+    <path
+       d="m 127,990.98716 v -5.25 q 0,-1.1484 -0.73828,-1.8867 -0.73828,-0.7383 -1.88672,-0.7383 H 3.6250002 q -1.14844,0 -1.88672,0.7383 -0.7382799,0.7383 -0.7382799,1.8867 v 5.25 q 0,1.1484 0.7382799,1.8867 0.73828,0.7383 1.88672,0.7383 H 124.375 q 1.14844,0 1.88672,-0.7383 Q 127,992.13556 127,990.98716 Z"
+       id="path4"
+       style="fill:#0d5cc6;fill-opacity:1"
+       inkscape:connector-curvature="0" />
+  </g>
+</svg>

src/calibre/gui2/comments_editor.py

@@ -163,9 +163,13 @@ class EditorWidget(QWebView):  # {{{
 
         self.action_insert_link = QAction(QIcon(I('insert-link.png')),
                 _('Insert link or image'), self)
+        self.action_insert_hr = QAction(QIcon(I('format-text-hr.png')),
+                _('Insert separator'), self)
         self.action_insert_link.triggered.connect(self.insert_link)
+        self.action_insert_hr.triggered.connect(self.insert_hr)
         self.pageAction(QWebPage.ToggleBold).changed.connect(self.update_link_action)
         self.action_insert_link.setEnabled(False)
+        self.action_insert_hr.setEnabled(False)
         self.action_clear = QAction(QIcon(I('trash.png')), _('Clear'), self)
         self.action_clear.triggered.connect(self.clear_text)
 
@@ -177,8 +181,9 @@ class EditorWidget(QWebView):  # {{{
         self.set_readonly(False)
 
     def update_link_action(self):
-        wac = self.pageAction(QWebPage.ToggleBold)
+        wac = self.pageAction(QWebPage.ToggleBold).isEnabled()
-        self.action_insert_link.setEnabled(wac.isEnabled())
+        self.action_insert_link.setEnabled(wac)
+        self.action_insert_hr.setEnabled(wac)
 
     def set_readonly(self, what):
         self.readonly = what
@@ -209,6 +214,9 @@ class EditorWidget(QWebView):  # {{{
         if col.isValid():
             self.exec_command('hiliteColor', unicode(col.name()))
 
+    def insert_hr(self, *args):
+        self.exec_command('insertHTML', '<hr>')
+
     def insert_link(self, *args):
         link, name, is_image = self.ask_link()
         if not link:
@@ -705,6 +713,7 @@ class Editor(QWidget):  # {{{
         if hasattr(w, 'setPopupMode'):
             w.setPopupMode(w.InstantPopup)
         self.toolbar2.addAction(self.editor.action_insert_link)
+        self.toolbar2.addAction(self.editor.action_insert_hr)
         # }}}
 
         # toolbar3 {{{