Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/bookmarks/bookmark_panel_view.h

+// Copyright 2014 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 IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_PANEL_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_PANEL_VIEW_H_
+
+#import <UIKit/UIKit.h>
+
+@class BookmarkPanelView;
+
+@protocol BookmarkPanelViewDelegate
+// The menu is going to be programmatically shown or hidden.
+- (void)bookmarkPanelView:(BookmarkPanelView*)view
+             willShowMenu:(BOOL)showMenu
+    withAnimationDuration:(CGFloat)duration;
+// |visibility| is 1 when the menu is fully visible, and 0 when the menu is
+// fully hidden.
+// This callback is invoked frequently during a user-driven animation.
+// This callback is not invoked for programmatic animations.
+// Every user-driven animation is guaranteed to be followed by a programmatic
+// animation.
+- (void)bookmarkPanelView:(BookmarkPanelView*)view
+    updatedMenuVisibility:(CGFloat)visibility;
+@end
+
+// This view holds a content view, and a menu view.  The menu sits off the
+// screen to the left. The user can pan right on the screen to drag the menu
+// view onto the content view.
+@interface BookmarkPanelView : UIView
+
+// Designated initializer.
+// The menu has the same height as the frame.
+- (id)initWithFrame:(CGRect)frame menuViewWidth:(CGFloat)width;
+
+// If a user-driven animation is in progress, these methods have no effect.
+// Calling these methods will invoke delegate callbacks.
+- (void)showMenuAnimated:(BOOL)animated;
+- (void)hideMenuAnimated:(BOOL)animated;
+
+// Even if this method returns NO, the menu can still be in the process of a
+// programmatic animation.
+- (BOOL)userDrivenAnimationInProgress;
+
+@property(nonatomic, assign) id<BookmarkPanelViewDelegate> delegate;
+
+// These views should not be modified directly. Instead, subviews should be
+// added to each to create the desired UI.
+@property(nonatomic, retain, readonly) UIView* contentView;
+@property(nonatomic, retain, readonly) UIView* menuView;
+
+// Whether the menu is being shown. If a user-driven animation is in progress,
+// this property reflects the state of the menu at the beginning of the
+// animation.
+@property(nonatomic, assign, readonly) BOOL showingMenu;
+
+// This method is used to enable or disable swiping in the menu from the left.
+- (void)enableSideSwiping:(BOOL)enable;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_PANEL_VIEW_H_