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

ios/chrome/browser/ui/tabs/tab_strip_controller.h

+// Copyright 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 IOS_CHROME_BROWSER_UI_TABS_TAB_STRIP_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_TABS_TAB_STRIP_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+@class TabModel;
+@class TabView;
+@protocol FullScreenControllerDelegate;
+
+namespace TabStrip {
+enum Style { kStyleDark, kStyleIncognito };
+
+// Returns the background color of the tabstrip view.
+UIColor* BackgroundColor();
+
+}  // namespace TabStrip
+
+// Notification when the tab strip will start an animation.
+extern NSString* const kWillStartTabStripTabAnimation;
+
+// Notifications when the user starts and ends a drag operation.
+extern NSString* const kTabStripDragStarted;
+extern NSString* const kTabStripDragEnded;
+
+// Controller class for the tabstrip.  Manages displaying tabs and keeping the
+// display in sync with the TabModel.  This controller is only instantiated on
+// tablet.  The tab strip view itself is a subclass of UIScrollView, which
+// manages scroll offsets and scroll animations.
+@interface TabStripController : NSObject
+
+@property(nonatomic, assign) BOOL highlightsSelectedTab;
+@property(nonatomic, readonly, retain) UIView* view;
+// YES if the tab strip will display the mode toggle switch. May be set to the
+// same value repeatedly with no layout penalty.
+@property(nonatomic, assign) BOOL hasModeToggleSwitch;
+
+// YES if the tab strip will display the tab switcher toggle switch. May be set
+// to the same value repeatedly with no layout penalty.
+@property(nonatomic, assign) BOOL hasTabSwitcherToggleSwitch;
+
+// May be nil if there is no mode toggle button.
+@property(nonatomic, readonly, assign) UIButton* modeToggleButton;
+// Used to check if the tabstrip is visible before starting an animation.
+@property(nonatomic, assign) id<FullScreenControllerDelegate>
+    fullscreenDelegate;
+
+// Designated initializer.
+- (instancetype)initWithTabModel:(TabModel*)tabModel
+                           style:(TabStrip::Style)style
+    NS_DESIGNATED_INITIALIZER;
+
+- (instancetype)init NS_UNAVAILABLE;
+
+// Called when a tab is tapped.  |sender| should be a TabView.
+- (IBAction)tabTapped:(id)sender;
+
+// Records metrics for the given action.
+- (IBAction)recordUserMetrics:(id)sender;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TABS_TAB_STRIP_CONTROLLER_H_