Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/tab_switcher/tab_switcher_view.h

+// Copyright 2015 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_TAB_SWITCHER_TAB_SWITCHER_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_TAB_SWITCHER_TAB_SWITCHER_VIEW_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/ui/tab_switcher/tab_switcher_model.h"
+
+@class TabSwitcherHeaderView;
+@class TabSwitcherView;
+
+namespace ios_internal {
+enum NewTabButtonStyle { UNINITIALIZED, BLUE, GRAY, HIDDEN };
+}  // namespace ios_internal
+
+@protocol TabSwitcherViewDelegate<NSObject>
+
+- (void)openNewTabInPanelAtIndex:(NSInteger)panelIndex;
+- (ios_internal::NewTabButtonStyle)buttonStyleForPanelAtIndex:
+    (NSInteger)panelIndex;
+- (BOOL)shouldShowDismissButtonForPanelAtIndex:(NSInteger)panelIndex;
+- (void)tabSwitcherViewDelegateDismissTabSwitcher:(TabSwitcherView*)delegate;
+
+@end
+
+@interface TabSwitcherView : UIView<UIScrollViewDelegate>
+
+@property(nonatomic, readonly) TabSwitcherHeaderView* headerView;
+@property(nonatomic, readonly) UIScrollView* scrollView;
+
+@property(nonatomic, assign) id<TabSwitcherViewDelegate> delegate;
+
+// Select the panel at the given index, updating both the header and content.
+// The panel selection will be animated if VoiceOver is disabled.
+- (void)selectPanelAtIndex:(NSInteger)index;
+// Adds the view |view| at index |index|.
+- (void)addPanelView:(UIView*)view atIndex:(NSUInteger)index;
+// Removes the view at index |index| and update scrollview.
+- (void)removePanelViewAtIndex:(NSUInteger)index;
+// Removes the view at index |index| and update scrollview if |update| is true.
+- (void)removePanelViewAtIndex:(NSUInteger)index updateScrollView:(BOOL)update;
+// Returns the index of the currently selected panel.
+- (NSInteger)currentPanelIndex;
+// Updates the state of the tab switcher overlay buttons.
+// Overlay buttons are the top right dismiss button and the bottom right new tab
+// button.
+- (void)updateOverlayButtonState;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TAB_SWITCHER_TAB_SWITCHER_VIEW_H_