bookmarks: Extract PerformBookmarkDrop() function out of bookmark_utils.h

chrome/browser/ui/views/bookmarks/bookmark_drag_drop.cc

-// 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.
-
-#include "chrome/browser/ui/views/bookmarks/bookmark_drag_drop.h"
-
-#include "base/message_loop.h"
-#include "base/prefs/pref_service.h"
-#include "chrome/browser/bookmarks/bookmark_model.h"
-#include "chrome/browser/bookmarks/bookmark_node_data.h"
-#include "chrome/browser/ui/bookmarks/bookmark_drag_drop.h"
-#include "chrome/common/pref_names.h"
-#include "components/user_prefs/user_prefs.h"
-#include "ui/base/dragdrop/drag_drop_types.h"
-#include "ui/base/dragdrop/os_exchange_data.h"
-#include "ui/base/events/event.h"
-#include "ui/views/drag_utils.h"
-#include "ui/views/widget/widget.h"
-
-namespace chrome {
-
-void DragBookmarks(Profile* profile,
-                   const std::vector<const BookmarkNode*>& nodes,
-                   gfx::NativeView view) {
-  DCHECK(!nodes.empty());
-
-  // Set up our OLE machinery
-  ui::OSExchangeData data;
-  BookmarkNodeData drag_data(nodes);
-  drag_data.Write(profile, &data);
-
-  // Allow nested message loop so we get DnD events as we drag this around.
-  bool was_nested = MessageLoop::current()->IsNested();
-  MessageLoop::current()->SetNestableTasksAllowed(true);
-
-  int operation = ui::DragDropTypes::DRAG_COPY |
-                  ui::DragDropTypes::DRAG_MOVE |
-                  ui::DragDropTypes::DRAG_LINK;
-  views::Widget* widget = views::Widget::GetWidgetForNativeView(view);
-  // TODO(varunjain): Properly determine and send DRAG_EVENT_SOURCE below.
-  if (widget) {
-    widget->RunShellDrag(NULL, data, gfx::Point(), operation,
-        ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
-  } else {
-    // We hit this case when we're using WebContentsViewWin or
-    // WebContentsViewAura, instead of WebContentsViewViews.
-    views::RunShellDrag(view, data, gfx::Point(), operation,
-        ui::DragDropTypes::DRAG_EVENT_SOURCE_MOUSE);
-  }
-
-  MessageLoop::current()->SetNestableTasksAllowed(was_nested);
-}
-
-int GetBookmarkDragOperation(content::BrowserContext* browser_context,
-                             const BookmarkNode* node) {
-  PrefService* prefs = components::UserPrefs::Get(browser_context);
-
-  int move = ui::DragDropTypes::DRAG_MOVE;
-  if (!prefs->GetBoolean(prefs::kEditBookmarksEnabled))
-    move = ui::DragDropTypes::DRAG_NONE;
-  if (node->is_url())
-    return ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK | move;
-  return ui::DragDropTypes::DRAG_COPY | move;
-}
-
-int GetPreferredBookmarkDropOperation(int source_operations, int operations) {
-  int common_ops = (source_operations & operations);
-  if (!common_ops)
-    return ui::DragDropTypes::DRAG_NONE;
-  if (ui::DragDropTypes::DRAG_COPY & common_ops)
-    return ui::DragDropTypes::DRAG_COPY;
-  if (ui::DragDropTypes::DRAG_LINK & common_ops)
-    return ui::DragDropTypes::DRAG_LINK;
-  if (ui::DragDropTypes::DRAG_MOVE & common_ops)
-    return ui::DragDropTypes::DRAG_MOVE;
-  return ui::DragDropTypes::DRAG_NONE;
-}
-
-int GetBookmarkDropOperation(Profile* profile,
-                             const ui::DropTargetEvent& event,
-                             const BookmarkNodeData& data,
-                             const BookmarkNode* parent,
-                             int index) {
-  if (data.IsFromProfile(profile) && data.size() > 1)
-    // Currently only accept one dragged node at a time.
-    return ui::DragDropTypes::DRAG_NONE;
-
-  if (!IsValidBookmarkDropLocation(profile, data, parent, index))
-    return ui::DragDropTypes::DRAG_NONE;
-
-  if (data.GetFirstNode(profile))
-    // User is dragging from this profile: move.
-    return ui::DragDropTypes::DRAG_MOVE;
-
-  // User is dragging from another app, copy.
-  return GetPreferredBookmarkDropOperation(event.source_operations(),
-      ui::DragDropTypes::DRAG_COPY | ui::DragDropTypes::DRAG_LINK);
-}
-
-bool IsValidBookmarkDropLocation(Profile* profile,
-                                 const BookmarkNodeData& data,
-                                 const BookmarkNode* drop_parent,
-                                 int index) {
-  if (!drop_parent->is_folder()) {
-    NOTREACHED();
-    return false;
-  }
-
-  if (!data.is_valid())
-    return false;
-
-  if (data.IsFromProfile(profile)) {
-    std::vector<const BookmarkNode*> nodes = data.GetNodes(profile);
-    for (size_t i = 0; i < nodes.size(); ++i) {
-      // Don't allow the drop if the user is attempting to drop on one of the
-      // nodes being dragged.
-      const BookmarkNode* node = nodes[i];
-      int node_index = (drop_parent == node->parent()) ?
-          drop_parent->GetIndexOf(nodes[i]) : -1;
-      if (node_index != -1 && (index == node_index || index == node_index + 1))
-        return false;
-
-      // drop_parent can't accept a child that is an ancestor.
-      if (drop_parent->HasAncestor(node))
-        return false;
-    }
-    return true;
-  }
-  // From the same profile, always accept.
-  return true;
-}
-
-}  // namespace chrome