chrome/browser/ui/cocoa/extensions/browser_action_button.h

// Copyright (c) 2012 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_EXTENSIONS_BROWSER_ACTION_BUTTON_H_
#define CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTION_BUTTON_H_

#import <Cocoa/Cocoa.h>

#import "base/mac/scoped_nsobject.h"
#include "base/memory/scoped_ptr.h"
#import "chrome/browser/ui/cocoa/image_button_cell.h"

class Browser;
class ExtensionAction;
@class ExtensionActionContextMenuController;
class ExtensionActionIconFactoryBridge;

namespace extensions {
class Extension;
}

// Fired on each drag event while the user is moving the button.
extern NSString* const kBrowserActionButtonDraggingNotification;
// Fired when the user drops the button.
extern NSString* const kBrowserActionButtonDragEndNotification;

@interface BrowserActionButton : NSButton<NSMenuDelegate> {
 @private
  // Bridge to proxy Chrome notifications to the Obj-C class as well as load the
  // extension's icon.
  scoped_ptr<ExtensionActionIconFactoryBridge> iconFactoryBridge_;

  // Used to move the button and query whether a button is currently animating.
  base::scoped_nsobject<NSViewAnimation> moveAnimation_;

  // The extension for this button. Weak.
  const extensions::Extension* extension_;

  // The ID of the active tab.
  int tabId_;

  // Whether the button is currently being dragged.
  BOOL isBeingDragged_;

  // Drag events could be intercepted by other buttons, so to make sure that
  // this is the only button moving if it ends up being dragged. This is set to
  // YES upon |mouseDown:|.
  BOOL dragCouldStart_;

  // The point where the mouse down event occurred. Used to prevent a drag from
  // starting until it moves at least kMinimumDragDistance.
  NSPoint dragStartPoint_;

  base::scoped_nsobject<
      ExtensionActionContextMenuController> contextMenuController_;
}

- (id)initWithFrame:(NSRect)frame
          extension:(const extensions::Extension*)extension
            browser:(Browser*)browser
              tabId:(int)tabId;

- (void)setFrame:(NSRect)frameRect animate:(BOOL)animate;

- (void)updateState;

- (BOOL)isAnimating;

// Returns a pointer to an autoreleased NSImage with the badge, shadow and
// cell image drawn into it.
- (NSImage*)compositedImage;

@property(readonly, nonatomic) BOOL isBeingDragged;
@property(readonly, nonatomic) const extensions::Extension* extension;
@property(readwrite, nonatomic) int tabId;

@end

@interface BrowserActionCell : ImageButtonCell {
 @private
  // The current tab ID used when drawing the cell.
  int tabId_;

  // The action we're drawing the cell for. Weak.
  ExtensionAction* extensionAction_;
}

@property(readwrite, nonatomic) int tabId;
@property(readwrite, nonatomic) ExtensionAction* extensionAction;

@end

#endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTION_BUTTON_H_