Add Opera-like mouse rocker gestures.

README.asciidoc

@@ -150,6 +150,7 @@ Contributors, sorted by the number of commits in descending order:
 * Matthias Lisin
 * Helen Sherwood-Taylor
 * HalosGhost
+* Gregor Pohl
 * Eivind Uggedal
 * Andreas Fischer
 // QUTE_AUTHORS_END

doc/help/settings.asciidoc

@@ -78,6 +78,7 @@
 |<<input-forward-unbound-keys,forward-unbound-keys>>|Whether to forward unbound keys to the webview in normal mode.
 |<<input-spatial-navigation,spatial-navigation>>|Enables or disables the Spatial Navigation feature
 |<<input-links-included-in-focus-chain,links-included-in-focus-chain>>|Whether hyperlinks should be included in the keyboard focus chain.
+|<<input-rocker-gestures,rocker-gestures>>|Whether to enable Opera-like mouse rocker gestures. This disables the context menu.
 |==============
 
 .Quick reference for section ``tabs''
@@ -731,6 +732,17 @@ Valid values:
 
 Default: +pass:[true]+
 
+[[input-rocker-gestures]]
+=== rocker-gestures
+Whether to enable Opera-like mouse rocker gestures. This disables the context menu.
+
+Valid values:
+
+ * +true+
+ * +false+
+
+Default: +pass:[false]+
+
 == tabs
 Configuration of the tab bar.
 

qutebrowser/browser/webview.py

@@ -143,6 +143,8 @@ class WebView(QWebView):
         self.setZoomFactor(float(config.get('ui', 'default-zoom')) / 100)
         self._default_zoom_changed = False
         objreg.get('config').changed.connect(self.on_config_changed)
+        if config.get('input', 'rocker-gestures'):
+            self.setContextMenuPolicy(Qt.PreventContextMenu)
 
     def __repr__(self):
         url = utils.elide(self.url().toDisplayString(), 50)
@@ -178,6 +180,11 @@ class WebView(QWebView):
                                    100)
             self._default_zoom_changed = False
             self.init_neighborlist()
+        elif section == 'input' and option == 'rocker-gestures':
+            if config.get('input', 'rocker-gestures'):
+                self.setContextMenuPolicy(Qt.PreventContextMenu)
+            else:
+                self.setContextMenuPolicy(Qt.DefaultContextMenu)
 
     def init_neighborlist(self):
         """Initialize the _zoom neighborlist."""
@@ -192,15 +199,15 @@ class WebView(QWebView):
         Args:
             e: The QMouseEvent.
         """
-        if e.button() == Qt.XButton1:
+        if e.button() in (Qt.XButton1, Qt.LeftButton):
-            # Back button on mice which have it.
+            # Back button on mice which have it, or rocker gesture
             if self.page().history().canGoBack():
                 self.back()
             else:
                 message.error(self._win_id, "At beginning of history.",
                               immediately=True)
-        elif e.button() == Qt.XButton2:
+        elif e.button() in (Qt.XButton2, Qt.RightButton):
-            # Forward button on mice which have it.
+            # Forward button on mice which have it, or rocker gesture
             if self.page().history().canGoForward():
                 self.forward()
             else:
@@ -497,7 +504,10 @@ class WebView(QWebView):
         Return:
             The superclass return value.
         """
-        if e.button() in (Qt.XButton1, Qt.XButton2):
+        is_rocker_gesture = (config.get('input', 'rocker-gestures') and
+                             e.buttons() == Qt.LeftButton | Qt.RightButton)
+
+        if e.button() in (Qt.XButton1, Qt.XButton2) or is_rocker_gesture:
             self._mousepress_backforward(e)
             super().mousePressEvent(e)
             return

qutebrowser/config/configdata.py

@@ -370,6 +370,11 @@ DATA = collections.OrderedDict([
         ('links-included-in-focus-chain',
          SettingValue(typ.Bool(), 'true'),
          "Whether hyperlinks should be included in the keyboard focus chain."),
+
+        ('rocker-gestures',
+         SettingValue(typ.Bool(), 'false'),
+         "Whether to enable Opera-like mouse rocker gestures. This disables "
+         "the context menu."),
     )),
 
     ('tabs', sect.KeyValue(