Remove Aero Peek Tabs code.

chrome/browser/aeropeek_manager.h

-// Copyright (c) 2011 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.
-
-#ifndef CHROME_BROWSER_AEROPEEK_MANAGER_H_
-#define CHROME_BROWSER_AEROPEEK_MANAGER_H_
-#pragma once
-
-#include <windows.h>
-
-#include <list>
-
-#include "chrome/browser/tabs/tab_strip_model_observer.h"
-#include "ui/gfx/insets.h"
-
-class AeroPeekWindow;
-class SkBitmap;
-class TabContentsWrapper;
-
-namespace content {
-class WebContents;
-}
-
-namespace gfx {
-class Size;
-}
-
-// A class which defines interfaces called from AeroPeekWindow.
-// This class is used for dispatching an event received by a thumbnail window
-// and for retrieving information from Chrome.
-// An AeroPeek window receives the following events:
-// * A user clicks an AeroPeek thumbnail.
-//   We need to select a tab associated with this window.
-// * A user closes an AeroPeek thumbnail.
-//   We need to close a tab associated with this window.
-// * A user clicks a toolbar button in an AeroPeek window.
-//   We may need to dispatch this button event to a tab associated with this
-//   thumbnail window.
-//   <http://msdn.microsoft.com/en-us/library/dd378460(VS.85).aspx#thumbbars>.
-// Also, it needs the following information of the browser:
-// * The bitmap of a tab associated with this window.
-//   This bitmap is used for creating thumbnail and preview images.
-// * The rectangle of a browser frame.
-//   This rectangle is used for pasting the above bitmap to the right position
-//   and for marking the tab-content area as opaque.
-// We assume these functions are called only from a UI thread (i.e.
-// Chrome_BrowserMain).
-class AeroPeekWindowDelegate {
- public:
-  virtual void ActivateTab(int tab_id) = 0;
-  virtual void CloseTab(int tab_id) = 0;
-  virtual void GetContentInsets(gfx::Insets* insets) = 0;
-  virtual bool GetTabThumbnail(int tab_id, SkBitmap* thumbnail) = 0;
-  virtual bool GetTabPreview(int tab_id, SkBitmap* preview) = 0;
-
- protected:
-  virtual ~AeroPeekWindowDelegate() {}
-};
-
-// A class that implements AeroPeek of Windows 7:
-// <http://msdn.microsoft.com/en-us/library/dd378460(VS.85).aspx#thumbnails>.
-// Windows 7 can dispay a thumbnail image of each tab to its taskbar so that
-// a user can preview the contents of a tab (AeroPeek), choose a tab, close
-// a tab, etc.
-// This class implements the TabStripModelObserver interface to receive the
-// following events sent from TabStripModel and dispatch them to Windows:
-// * A tab is added.
-//   This class adds a thumbnail window for this tab to the thumbnail list
-//   of Windows.
-// * A tab is being closed.
-//   This class deletes the thumbnail window associated with this tab from the
-//   thumbnail list of Windows.
-// * A tab has been updated.
-//   This class updates the image of the thumbnail window associated with this
-//   tab.
-// Also, this class receives events sent from Windows via thumbnail windows to
-// TabStripModel:
-// * A thumbnail window is closed.
-//   Ask TabStrip to close the tab associated with this thumbnail window.
-// * A thumbnail window is selected.
-//   Ask TabStrip to activate the tab associated with this thumbnail window.
-//
-// The simplest usage of this class is:
-// 1. Create an instance of TabThumbnailManager.
-// 2. Add this instance to the observer list of a TabStrip object.
-//
-//      scoped_ptr<TabThumbnailManager> manager;
-//      manager.reset(new TabThumbnailManager(
-//          frame_->GetWindow()->GetNativeWindow(),
-//          border_left,
-//          border_top,
-//          toolbar_top));
-//      g_browser->tabstrip_model()->AddObserver(manager);
-//
-// 3. Remove this instance from the observer list of the TabStrip object when
-//    we don't need it.
-//
-//      g_browser->tabstrip_model()->RemoveObserver(manager);
-//
-class AeroPeekManager : public TabStripModelObserver,
-                        public AeroPeekWindowDelegate {
- public:
-  explicit AeroPeekManager(HWND application_window);
-  virtual ~AeroPeekManager();
-
-  // Sets the margins of the "user-perceived content area".
-  // (See comments of |content_insets_|).
-  void SetContentInsets(const gfx::Insets& insets);
-
-  // Returns whether or not we should enable Tab Thumbnailing and Aero Peek
-  // of Windows 7.
-  static bool Enabled();
-
-  // Overridden from TabStripModelObserver:
-  virtual void TabInsertedAt(TabContentsWrapper* contents,
-                             int index,
-                             bool foreground);
-  virtual void TabDetachedAt(TabContentsWrapper* contents, int index);
-  virtual void ActiveTabChanged(TabContentsWrapper* old_contents,
-                                TabContentsWrapper* new_contents,
-                                int index,
-                                bool user_gesture);
-  virtual void TabMoved(TabContentsWrapper* contents,
-                        int from_index,
-                        int to_index,
-                        bool pinned_state_changed);
-  virtual void TabChangedAt(TabContentsWrapper* contents,
-                            int index,
-                            TabChangeType change_type);
-  virtual void TabReplacedAt(TabStripModel* tab_strip_model,
-                             TabContentsWrapper* old_contents,
-                             TabContentsWrapper* new_contents,
-                             int index);
-
-  // Overriden from TabThumbnailWindowDelegate:
-  virtual void CloseTab(int tab_id);
-  virtual void ActivateTab(int tab_id);
-  virtual void GetContentInsets(gfx::Insets* insets);
-  virtual bool GetTabThumbnail(int tab_id, SkBitmap* thumbnail);
-  virtual bool GetTabPreview(int tab_id, SkBitmap* preview);
-
- private:
-  // Deletes the TabThumbnailWindow object associated with the specified
-  // Tab ID.
-  void DeleteAeroPeekWindow(int tab_id);
-
-  // If there is an AeroPeekWindow associated with |tab| it is removed and
-  // deleted.
-  void DeleteAeroPeekWindowForTab(TabContentsWrapper* tab);
-
-  // Retrieves the AeroPeekWindow object associated with the specified
-  // Tab ID.
-  AeroPeekWindow* GetAeroPeekWindow(int tab_id) const;
-
-  // If an AeroPeekWindow hasn't been created for |tab| yet, one is created.
-  // |foreground| is true if the tab is selected.
-  void CreateAeroPeekWindowIfNecessary(TabContentsWrapper* tab,
-                                       bool foreground);
-
-  // Returns a rectangle that fits into the destination rectangle and keeps
-  // the pixel-aspect ratio of the source one.
-  // (This function currently uses the longer-fit algorithm as IE8 does.)
-  void GetOutputBitmapSize(const gfx::Size& destination,
-                           const gfx::Size& source,
-                           gfx::Size* output) const;
-
-  // Returns the WebContents object associated with the specified Tab ID only
-  // if it is alive.
-  // Since Windows cannot send AeroPeek events directly to Chrome windows, we
-  // use a place-holder window to receive AeroPeek events. So, when Windows
-  // sends an AeroPeek event, the corresponding tab (and WebContents) may have
-  // been deleted by Chrome. To prevent us from accessing deleted WebContents,
-  // we need to check if the tab is still alive.
-  content::WebContents* GetWebContents(int tab_id) const;
-
-  // Returns the tab ID from the specified TabContentsWrapper.
-  int GetTabID(TabContentsWrapper* contents) const;
-
- private:
-  // The parent window of the place-holder windows used by AeroPeek.
-  // In the case of Chrome, this window becomes a browser frame.
-  HWND application_window_;
-
-  // The list of the place-holder windows used by AeroPeek.
-  std::list<AeroPeekWindow*> tab_list_;
-
-  // The left and top borders of the frame window.
-  // When we create a preview bitmap, we use these values for preventing from
-  // over-writing the area of the browser frame.
-  int border_left_;
-  int border_top_;
-
-  // The top position of the toolbar.
-  // This value is used for setting the alpha values of the frame area so a
-  // preview image can use transparent colors only in the frame area.
-  int toolbar_top_;
-
-  // The margins of the "user-perceived content area".
-  // This value is used for pasting a tab image onto this "user-perceived
-  // content area" when creating a preview image.
-  gfx::Insets content_insets_;
-};
-
-#endif  // CHROME_BROWSER_AEROPEEK_MANAGER_H_