chrome/browser/ui/views/frame/browser_command_handler_linux.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/views/frame/browser_command_handler_linux.h"
   6
   7 #include "chrome/browser/ui/browser.h"
   8 #include "chrome/browser/ui/tabs/tab_strip_model.h"
   9 #include "chrome/browser/ui/views/frame/browser_view.h"
  10 #include "content/public/browser/navigation_controller.h"
  11 #include "content/public/browser/web_contents.h"
  12 #include "ui/aura/window.h"
  13 #include "ui/events/event.h"
  14
  15 BrowserCommandHandlerLinux::BrowserCommandHandlerLinux(
  16     BrowserView* browser_view)
  17     : browser_view_(browser_view) {
  18   aura::Window* window = browser_view_->frame()->GetNativeWindow();
  19   DCHECK(window);
  20   if (window)
  21     window->AddPreTargetHandler(this);
  22 }
  23
  24 BrowserCommandHandlerLinux::~BrowserCommandHandlerLinux() {
  25   aura::Window* window = browser_view_->frame()->GetNativeWindow();
  26   if (window)
  27     window->RemovePreTargetHandler(this);
  28 }
  29
  30 void BrowserCommandHandlerLinux::OnMouseEvent(ui::MouseEvent* event) {
  31   // Handle standard Linux mouse buttons for going back and forward.
  32   if (event->type() != ui::ET_MOUSE_PRESSED)
  33     return;
  34
  35   bool back_button_pressed =
  36       (event->changed_button_flags() == ui::EF_BACK_MOUSE_BUTTON);
  37   bool forward_button_pressed =
  38       (event->changed_button_flags() == ui::EF_FORWARD_MOUSE_BUTTON);
  39   if (!back_button_pressed && !forward_button_pressed)
  40     return;
  41
  42   content::WebContents* contents =
  43       browser_view_->browser()->tab_strip_model()->GetActiveWebContents();
  44   if (!contents)
  45     return;
  46   content::NavigationController& controller = contents->GetController();
  47   if (back_button_pressed && controller.CanGoBack())
  48     controller.GoBack();
  49   else if (forward_button_pressed && controller.CanGoForward())
  50     controller.GoForward();
  51   // Always consume the event, whether a navigation was successful or not.
  52   event->SetHandled();
  53 }