// 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_UI_COCOA_TABPOSE_WINDOW_H_
#define CHROME_BROWSER_UI_COCOA_TABPOSE_WINDOW_H_

#import <Cocoa/Cocoa.h>

#include "base/mac/scoped_cftyperef.h"

#include "base/memory/scoped_nsobject.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"

namespace tabpose {

class Tile;
class TileSet;

}

namespace tabpose {

enum WindowState {
  kFadingIn,
  kFadedIn,
  kFadingOut,
};

}  // namespace tabpose

class TabStripModel;
class TabStripModelObserverBridge;

// A TabposeWindow shows an overview of open tabs and lets the user select a new
// active tab. The window blocks clicks on the tab strip and the download
// shelf. Every open browser window has its own overlay, and they are
// independent of each other.
@interface TabposeWindow : NSWindow {
 @private
  tabpose::WindowState state_;

  // The root layer added to the content view. Covers the whole window.
  CALayer* rootLayer_;  // weak

  // The layer showing the background layer. Covers the whole visible area.
  CALayer* bgLayer_;  // weak

  // Top gradient.
  CALayer* topGradient_;  // weak

  // The layer drawn behind the currently selected tile.
  CALayer* selectionHighlight_;  // weak

  // Colors used by the layers.
  base::mac::ScopedCFTypeRef<CGColorRef> gray_;
  base::mac::ScopedCFTypeRef<CGColorRef> darkBlue_;

  TabStripModel* tabStripModel_;  // weak

  // Stores all preview layers. The order in here matches the order in
  // the tabstrip model.
  scoped_nsobject<NSMutableArray> allThumbnailLayers_;

  scoped_nsobject<NSMutableArray> allFaviconLayers_;
  scoped_nsobject<NSMutableArray> allTitleLayers_;

  // Manages the state of all layers.
  scoped_ptr<tabpose::TileSet> tileSet_;

  // The rectangle of the window that contains all layers. This is the
  // rectangle occupied by |bgLayer_|.
  NSRect containingRect_;

  // Informs us of added/removed/updated tabs.
  scoped_ptr<TabStripModelObserverBridge> tabStripModelObserverBridge_;

  // The icon used for the closebutton layers.
  base::mac::ScopedCFTypeRef<CGImageRef> closeIcon_;

  // True if all close layers should be shown (as opposed to just the close
  // layer of the currently selected thumbnail).
  BOOL showAllCloseLayers_;
}

// Shows a TabposeWindow on top of |parent|, with |rect| being the active area.
// If |slomo| is YES, then the appearance animation is shown in slow motion.
// The window blocks all keyboard and mouse events and releases itself when
// closed.
+ (id)openTabposeFor:(NSWindow*)parent
                rect:(NSRect)rect
               slomo:(BOOL)slomo
       tabStripModel:(TabStripModel*)tabStripModel;
@end

@interface TabposeWindow (TestingAPI)
- (void)selectTileAtIndexWithoutAnimation:(int)newIndex;
- (NSUInteger)thumbnailLayerCount;
- (int)selectedIndex;
@end

#endif  // CHROME_BROWSER_UI_COCOA_TABPOSE_WINDOW_H_