| // Copyright (c) 2017 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 CONTENT_BROWSER_RENDERER_HOST_CURSOR_MANAGER_H_ |
| #define CONTENT_BROWSER_RENDERER_HOST_CURSOR_MANAGER_H_ |
| |
| #include <map> |
| |
| #include "content/common/content_export.h" |
| #include "content/common/cursors/webcursor.h" |
| |
| namespace content { |
| |
| class RenderWidgetHostViewBase; |
| |
| // CursorManager coordinates mouse cursors for multiple RenderWidgetHostViews |
| // on a single page. It is owned by the top-level RenderWidgetHostView and |
| // calls back to its DisplayCursor method when the cursor needs to change, |
| // either because the mouse moved over a different view or because a cursor |
| // update was received for the current view. |
| class CONTENT_EXPORT CursorManager { |
| public: |
| class TooltipObserver { |
| public: |
| virtual ~TooltipObserver() {} |
| |
| virtual void OnSetTooltipTextForView( |
| const RenderWidgetHostViewBase* view, |
| const base::string16& tooltip_text) = 0; |
| }; |
| |
| CursorManager(RenderWidgetHostViewBase* root); |
| ~CursorManager(); |
| |
| // Called for any RenderWidgetHostView that received an UpdateCursor message |
| // from its renderer process. |
| void UpdateCursor(RenderWidgetHostViewBase*, const WebCursor&); |
| |
| // Called when the mouse moves over a different RenderWidgetHostView. |
| void UpdateViewUnderCursor(RenderWidgetHostViewBase*); |
| |
| // Accepts TooltipText updates from views, but only updates what's displayed |
| // if the requesting view is currently under the mouse cursor. |
| void SetTooltipTextForView(const RenderWidgetHostViewBase* view, |
| const base::string16& tooltip_text); |
| |
| // Notification of a RenderWidgetHostView being destroyed, so that its |
| // cursor map entry can be removed if it has one. If it is the current |
| // view_under_cursor_, then the root_view_'s cursor will be displayed. |
| void ViewBeingDestroyed(RenderWidgetHostViewBase*); |
| |
| // Accessor for browser tests, enabling verification of the cursor_map_. |
| // Returns false if the provided View is not in the map, and outputs |
| // the cursor otherwise. |
| bool GetCursorForTesting(RenderWidgetHostViewBase*, WebCursor&); |
| |
| void SetTooltipObserverForTesting(TooltipObserver* observer); |
| |
| private: |
| // Stores the last received cursor from each RenderWidgetHostView. |
| std::map<RenderWidgetHostViewBase*, WebCursor> cursor_map_; |
| |
| // The view currently underneath the cursor, which corresponds to the cursor |
| // currently displayed. |
| RenderWidgetHostViewBase* view_under_cursor_; |
| |
| // The root view is the target for DisplayCursor calls whenever the active |
| // cursor needs to change. |
| RenderWidgetHostViewBase* root_view_; |
| |
| TooltipObserver* tooltip_observer_for_testing_; |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_RENDERER_HOST_CURSOR_MANAGER_H_ |