Upstream Chrome on iOS source code [8/11].

ios/chrome/browser/ui/side_swipe/side_swipe_controller.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_SIDE_SWIPE_SIDE_SWIPE_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_SIDE_SWIPE_SIDE_SWIPE_CONTROLLER_H_
+
+#import <UIKit/UIKit.h>
+
+#include "ios/chrome/browser/infobars/infobar_container_ios.h"
+#import "ios/chrome/browser/tabs/tab_model.h"
+#import "ios/chrome/browser/tabs/tab_snapshotting_delegate.h"
+#import "ios/chrome/browser/ui/tabs/tab_strip_controller.h"
+#import "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
+#import "ios/web/web_state/ui/crw_swipe_recognizer_provider.h"
+
+@class CardSideSwipeView;
+@class SideSwipeGestureRecognizer;
+
+namespace ios_internal {
+// Notification sent when the user starts a side swipe (on tablet).
+extern NSString* const kSideSwipeWillStartNotification;
+// Notification sent when the user finishes a side swipe (on tablet).
+extern NSString* const kSideSwipeDidStopNotification;
+}  // namespace ios_internal
+
+// A protocol for the Side Swipe controller sources.
+@protocol SideSwipeContentProvider
+// Returns whether this source can provide content for a back/forward side swipe
+// gesture.
+- (BOOL)canGoBack;
+- (BOOL)canGoForward;
+
+// Called on completion of a back/forward gesture.
+- (void)goBack:(web::WebState*)webState;
+- (void)goForward:(web::WebState*)webState;
+
+// The icon to display in the side panel.
+- (UIImage*)paneIcon;
+
+// Whether the icon is oriented and should be reflected on forward pane.
+- (BOOL)rotateForwardIcon;
+@end
+
+@protocol SideSwipeControllerDelegate
+@required
+// Called when the horizontal stack view is done and should be removed.
+- (void)sideSwipeViewDismissAnimationDidEnd:(UIView*)sideSwipeView;
+// Returns the main content view.
+- (UIView*)contentView;
+// Returns the toolbar controller.
+- (WebToolbarController*)toolbarController;
+// Returns the tabstrip controller.
+- (TabStripController*)tabStripController;
+// Makes |tab| the currently visible tab, displaying its view.  Calls
+// -selectedTabChanged on the toolbar only if |newSelection| is YES.
+- (void)displayTab:(Tab*)tab isNewSelection:(BOOL)newSelection;
+// Check the invariant of "toolbar in front of infobar container which
+// is in front of content area." This DCHECK happens if addSubview and/or
+// insertSubview messed up the view ordering earlier.
+- (BOOL)verifyToolbarViewPlacementInView:(UIView*)views;
+// Controls the visibility of views such as the findbar, infobar and voice
+// search bar.
+- (void)updateAccessoryViewsForSideSwipeWithVisibility:(BOOL)visible;
+// Returns the height of the header view for the tab model's current tab.
+- (CGFloat)headerHeight;
+// Returns |YES| if side swipe should be blocked from initiating, such as when
+// voice search is up, or if the tools menu is enabled.
+- (BOOL)preventSideSwipe;
+@end
+
+// Controls how an edge gesture is processed, either as tab change or a page
+// change.  For tab changes two full screen CardSideSwipeView views are dragged
+// across the screen. For page changes the SideSwipeControllerDelegate
+// |contentView| is moved across the screen and a SideSwipeNavigationView is
+// shown in the remaining space.
+@interface SideSwipeController
+    : NSObject<CRWSwipeRecognizerProvider, UIGestureRecognizerDelegate>
+
+@property(nonatomic, assign) BOOL inSwipe;
+@property(nonatomic, assign) id<SideSwipeControllerDelegate> swipeDelegate;
+@property(nonatomic, assign) id<TabSnapshottingDelegate> snapshotDelegate;
+
+// Initializer.
+- (id)initWithTabModel:(TabModel*)model
+          browserState:(ios::ChromeBrowserState*)browserState;
+
+// Set up swipe gesture recognizers.
+- (void)addHorizontalGesturesToView:(UIView*)view;
+
+// Returns set of UIGestureRecognizer objects.
+- (NSSet*)swipeRecognizers;
+
+// Enable or disable the side swipe gesture recognizer.
+- (void)setEnabled:(BOOL)enabled;
+
+// Returns |NO| if the device should not rotate.
+- (BOOL)shouldAutorotate;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_SIDE_SWIPE_SIDE_SWIPE_CONTROLLER_H_