Linux: For mouse button clicks, only send buttons 1, 2, 3 to the renderer....

chrome/browser/renderer_host/render_widget_host_view_gtk.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/renderer_host/render_widget_host_view_gtk.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gdk/gdkx.h>
@@ skipping 202 matching lines @@
     // Notify the GtkIMContext object of this focus-in event and
     // detach this GtkIMContext object from this window.
     gtk_im_context_focus_out(host_view->im_context_);
     gtk_im_context_set_client_window(host_view->im_context_, NULL);
     return FALSE;
   }
 
   static gboolean ButtonPressReleaseEvent(
       GtkWidget* widget, GdkEventButton* event,
       RenderWidgetHostViewGtk* host_view) {
+    if (!(event->button == 1 || event->button == 2 || event->button == 3))
+      return FALSE;  // We do not forward any other buttons to the renderer.
+
     // We want to translate the coordinates of events that do not originate
     // from this widget to be relative to the top left of the widget.
     GtkWidget* event_widget = gtk_get_event_widget(
         reinterpret_cast<GdkEvent*>(event));
     if (event_widget != widget) {
       int x = 0;
       int y = 0;
       gtk_widget_get_pointer(widget, &x, &y);
       // If the mouse event happens outside our popup, force the popup to
       // close.  We do this so a hung renderer doesn't prevent us from
@@ skipping 11 matching lines @@
       event->x = x;
       event->y = y;
     }
     host_view->is_popup_first_mouse_release_ = false;
     host_view->GetRenderWidgetHost()->ForwardMouseEvent(
         WebInputEventFactory::mouseEvent(event));
 
     // TODO(evanm): why is this necessary here but not in test shell?
     // This logic is the same as GtkButton.
     if (event->type == GDK_BUTTON_PRESS && !GTK_WIDGET_HAS_FOCUS(widget))
       gtk_widget_grab_focus(widget);

[Evan Martin, 2009/07/09 00:01:08]

I wonder if this bit of code is related to the mystery focus bugs we've had.

[Evan Stade, 2009/07/09 00:11:08]

I wouldn't be too surprised, it's worth messing around with.

 
-    return FALSE;
+    return TRUE;  // We did handle the mouse event.
   }
 
   static gboolean MouseMoveEvent(GtkWidget* widget, GdkEventMotion* event,
                                  RenderWidgetHostViewGtk* host_view) {
     // We want to translate the coordinates of events that do not originate
     // from this widget to be relative to the top left of the widget.
     GtkWidget* event_widget = gtk_get_event_widget(
         reinterpret_cast<GdkEvent*>(event));
     if (event_widget != widget) {
       int x = 0;
@@ skipping 445 matching lines @@
 }
 
 gfx::PluginWindowHandle RenderWidgetHostViewGtk::CreatePluginContainer() {
   return plugin_container_manager_.CreatePluginContainer();
 }
 
 void RenderWidgetHostViewGtk::DestroyPluginContainer(
     gfx::PluginWindowHandle container) {
   plugin_container_manager_.DestroyPluginContainer(container);
 }