Refactoring bookmark viewcontrollers

ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.mm

-// 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.
-
-#import "ios/chrome/browser/ui/bookmarks/bookmark_home_view_controller.h"
-
-#include "components/bookmarks/browser/base_bookmark_model_observer.h"
-#include "components/bookmarks/browser/bookmark_model.h"
-#include "ios/chrome/browser/bookmarks/bookmark_model_factory.h"
-#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#import "ios/chrome/browser/ui/bookmarks/bookmark_collection_view.h"
-#import "ios/chrome/browser/ui/url_loader.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-using bookmarks::BookmarkNode;
-
-@interface BookmarkHomeViewController ()
-
-// Redefined to be readwrite.
-@property(nonatomic, strong, readwrite) NSMutableArray* editIndexPaths;
-
-// Returns the parent, if all the bookmarks are siblings.
-// Otherwise returns the mobile_node.
-+ (const BookmarkNode*)
-defaultMoveFolderFromBookmarks:(const std::set<const BookmarkNode*>&)bookmarks
-                         model:(bookmarks::BookmarkModel*)model;
-@end
-
-@implementation BookmarkHomeViewController
-@synthesize delegate = _delegate;
-@synthesize editIndexPaths = _editIndexPaths;
-@synthesize editing = _editing;
-@synthesize bookmarks = _bookmarks;
-@synthesize loader = _loader;
-@synthesize browserState = _browserState;
-
-- (instancetype)initWithLoader:(id<UrlLoader>)loader
-                  browserState:(ios::ChromeBrowserState*)browserState {
-  DCHECK(browserState);
-  self = [super initWithNibName:nil bundle:nil];
-  if (self) {
-    _browserState = browserState->GetOriginalChromeBrowserState();
-    _loader = loader;
-
-    _bookmarks = ios::BookmarkModelFactory::GetForBrowserState(_browserState);
-    _editIndexPaths = [[NSMutableArray alloc] init];
-
-    [self resetEditNodes];
-  }
-  return self;
-}
-
-- (void)loadView {
-  CGRect frame = [[UIScreen mainScreen] bounds];
-  self.view = [[UIView alloc] initWithFrame:frame];
-}
-
-- (void)resetEditNodes {
-  _editNodes = std::set<const BookmarkNode*>();
-  _editNodesOrdered = std::vector<const BookmarkNode*>();
-  [self.editIndexPaths removeAllObjects];
-}
-
-- (void)insertEditNode:(const BookmarkNode*)node
-           atIndexPath:(NSIndexPath*)indexPath {
-  if (_editNodes.find(node) != _editNodes.end())
-    return;
-  _editNodes.insert(node);
-  _editNodesOrdered.push_back(node);
-  if (indexPath) {
-    [self.editIndexPaths addObject:indexPath];
-  } else {
-    // We insert null if we don't have the cell to keep the index valid.
-    [self.editIndexPaths addObject:[NSNull null]];
-  }
-}
-
-- (void)removeEditNode:(const BookmarkNode*)node
-           atIndexPath:(NSIndexPath*)indexPath {
-  if (_editNodes.find(node) == _editNodes.end())
-    return;
-
-  _editNodes.erase(node);
-  std::vector<const BookmarkNode*>::iterator it =
-      std::find(_editNodesOrdered.begin(), _editNodesOrdered.end(), node);
-  DCHECK(it != _editNodesOrdered.end());
-  _editNodesOrdered.erase(it);
-  if (indexPath) {
-    [self.editIndexPaths removeObject:indexPath];
-  } else {
-    // If we don't have the cell, we remove it by using its index.
-    const NSUInteger index = std::distance(_editNodesOrdered.begin(), it);
-    if (index < self.editIndexPaths.count) {
-      [self.editIndexPaths removeObjectAtIndex:index];
-    }
-  }
-}
-
-- (void)setEditing:(BOOL)editing animated:(BOOL)animated {
-  if (_editing == editing)
-    return;
-
-  _editing = editing;
-
-  // Only reset the editing state when leaving edit mode. This allows subclasses
-  // to add nodes for editing before entering edit mode.
-  if (!editing)
-    [self resetEditNodes];
-}
-
-- (void)dismissModals:(BOOL)animated {
-  // Do nothing in base class.
-}
-
-+ (const BookmarkNode*)
-defaultMoveFolderFromBookmarks:(const std::set<const BookmarkNode*>&)bookmarks
-                         model:(bookmarks::BookmarkModel*)model {
-  if (bookmarks.size() == 0)
-    return model->mobile_node();
-  const BookmarkNode* firstParent = (*(bookmarks.begin()))->parent();
-  for (const BookmarkNode* node : bookmarks) {
-    if (node->parent() != firstParent)
-      return model->mobile_node();
-  }
-
-  return firstParent;
-}
-
-@end
-
-@implementation BookmarkHomeViewController (PrivateAPIExposedForTesting)
-
-- (const std::set<const BookmarkNode*>&)editNodes {
-  return _editNodes;
-}
-
-- (void)setEditNodes:(const std::set<const BookmarkNode*>&)editNodes {
-  _editNodes = editNodes;
-}
-
-@end