Refactoring bookmark viewcontrollers

ios/chrome/browser/ui/bookmarks/bookmark_home_handset_view_controller.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_HOME_HANDSET_VIEW_CONTROLLER_H_
 #define IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_HOME_HANDSET_VIEW_CONTROLLER_H_
 
-#import "ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h"
+#import <UIKit/UIKit.h>
+
+#include <set>
+#include <vector>
+
+@class BookmarkHomeHandsetViewController;
+@class BookmarkCollectionView;
+class GURL;
+@protocol UrlLoader;
+
+namespace bookmarks {
+class BookmarkModel;
+class BookmarkNode;
+}  // namespace bookmarks
+
+namespace ios {
+class ChromeBrowserState;
+}  // namespace ios
+
+@protocol BookmarkHomeHandsetViewControllerDelegate
+// The view controller wants to be dismissed.
+// If |url| != GURL(), then the user has selected |url| for navigation.
+- (void)bookmarkHomeHandsetViewControllerWantsDismissal:
+            (BookmarkHomeHandsetViewController*)controller
+                                        navigationToUrl:(const GURL&)url;
+@end
 
 // Navigate/edit the bookmark hierarchy on a handset.
-@interface BookmarkHomeHandsetViewController : BookmarkHomeViewController
+@interface BookmarkHomeHandsetViewController : UIViewController {
+ @protected
+  // The following 2 ivars both represent the set of nodes being edited.
+  // The set is for fast lookup.
+  // The vector maintains the order that edit nodes were added.
+  // Use the relevant instance methods to modify these two ivars in tandem.
+  // DO NOT modify these two ivars directly.
+  std::set<const bookmarks::BookmarkNode*> _editNodes;
+  std::vector<const bookmarks::BookmarkNode*> _editNodesOrdered;
+}
 // Designated initializer.
 - (instancetype)initWithLoader:(id<UrlLoader>)loader
                   browserState:(ios::ChromeBrowserState*)browserState;
+
+#pragma mark - Properties Relevant To Presenters
+
+@property(nonatomic, weak) id<BookmarkHomeHandsetViewControllerDelegate>
+    delegate;
+
+#pragma mark - Properties
+// Whether the view controller is in editing mode.
+@property(nonatomic, assign, readonly) BOOL editing;
+// The set of selected index paths for edition.
+@property(nonatomic, strong, readonly) NSMutableArray* editIndexPaths;
+@property(nonatomic, assign, readonly) bookmarks::BookmarkModel* bookmarks;
+@property(nonatomic, weak, readonly) id<UrlLoader> loader;
+@property(nonatomic, assign, readonly) ios::ChromeBrowserState* browserState;
+
+#pragma mark - Relevant Methods
+// Replaces |_editNodes| and |_editNodesOrdered| with new container objects.
+- (void)resetEditNodes;
+// Adds |node| and |indexPath| if it isn't already present.
+- (void)insertEditNode:(const bookmarks::BookmarkNode*)node
+           atIndexPath:(NSIndexPath*)indexPath;
+// Removes |node| and |indexPath| if it's present.
+- (void)removeEditNode:(const bookmarks::BookmarkNode*)node
+           atIndexPath:(NSIndexPath*)indexPath;
+
+// This method updates the property, and resets the edit nodes.
+- (void)setEditing:(BOOL)editing animated:(BOOL)animated;
+
+// Dismisses any modal interaction elements. The base implementation does
+// nothing.
+- (void)dismissModals:(BOOL)animated;
+
 @end
 
 @interface BookmarkHomeHandsetViewController (ExposedForTesting)
 // Creates the default view to show all bookmarks, if it doesn't already exist.
 - (void)ensureAllViewExists;
+- (const std::set<const bookmarks::BookmarkNode*>&)editNodes;
+- (void)setEditNodes:(const std::set<const bookmarks::BookmarkNode*>&)editNodes;
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_BOOKMARKS_BOOKMARK_HOME_HANDSET_VIEW_CONTROLLER_H_