| /* |
| * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_AUTOSCROLL_CONTROLLER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_AUTOSCROLL_CONTROLLER_H_ |
| |
| #include "base/gtest_prod_util.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/geometry/float_point.h" |
| #include "third_party/blink/renderer/platform/geometry/float_size.h" |
| #include "third_party/blink/renderer/platform/geometry/int_point.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/time.h" |
| |
| namespace blink { |
| |
| class LocalFrame; |
| class Node; |
| class Page; |
| class LayoutBox; |
| class LayoutObject; |
| |
| enum AutoscrollType { |
| kNoAutoscroll, |
| kAutoscrollForDragAndDrop, |
| kAutoscrollForSelection, |
| kAutoscrollForMiddleClick, |
| }; |
| |
| enum MiddleClickMode { |
| // Middle button was just pressed but was neither released nor moved out of |
| // the deadzone yet. |
| kMiddleClickInitial, |
| // Mouse was moved out of the deadzone while still holding middle mouse |
| // button. In this mode, we'll stop autoscrolling when it's released. |
| kMiddleClickHolding, |
| // Middle button was released while still in the deadzone. In this mode, |
| // we'll stop autoscrolling when any button is clicked. |
| kMiddleClickToggled, |
| }; |
| |
| // AutscrollController handels autoscroll and middle click autoscroll for |
| // EventHandler. |
| class CORE_EXPORT AutoscrollController final |
| : public GarbageCollected<AutoscrollController> { |
| public: |
| static AutoscrollController* Create(Page&); |
| void Trace(blink::Visitor*); |
| |
| // Selection and drag-and-drop autoscroll. |
| void Animate(); |
| bool SelectionAutoscrollInProgress() const; |
| bool AutoscrollInProgressFor(const LayoutBox*) const; |
| bool AutoscrollInProgress() const; |
| void StartAutoscrollForSelection(LayoutObject*); |
| void StopAutoscroll(); |
| void StopAutoscrollIfNeeded(LayoutObject*); |
| void UpdateAutoscrollLayoutObject(); |
| void UpdateDragAndDrop(Node* target_node, |
| const IntPoint& event_position, |
| TimeTicks event_time); |
| |
| // Middle-click autoscroll. |
| void StartMiddleClickAutoscroll(LocalFrame*, |
| const FloatPoint& position, |
| const FloatPoint& position_global); |
| void HandleMouseMoveForMiddleClickAutoscroll( |
| LocalFrame*, |
| const FloatPoint& position_global, |
| bool is_middle_button); |
| void HandleMouseReleaseForMiddleClickAutoscroll(LocalFrame*, |
| bool is_middle_button); |
| void StopMiddleClickAutoscroll(LocalFrame*); |
| bool MiddleClickAutoscrollInProgress() const; |
| |
| private: |
| explicit AutoscrollController(Page&); |
| |
| // For test. |
| bool IsAutoscrolling() const; |
| |
| Member<Page> page_; |
| AutoscrollType autoscroll_type_ = kNoAutoscroll; |
| |
| // Selection and drag-and-drop autoscroll. |
| void ScheduleMainThreadAnimation(); |
| LayoutBox* autoscroll_layout_object_ = nullptr; |
| LayoutBox* pressed_layout_object_ = nullptr; |
| IntPoint drag_and_drop_autoscroll_reference_position_; |
| TimeTicks drag_and_drop_autoscroll_start_time_; |
| |
| // Middle-click autoscroll. |
| FloatPoint middle_click_autoscroll_start_pos_global_; |
| FloatSize last_velocity_; |
| MiddleClickMode middle_click_mode_ = kMiddleClickInitial; |
| |
| FRIEND_TEST_ALL_PREFIXES(AutoscrollControllerTest, |
| CrashWhenLayoutStopAnimationBeforeScheduleAnimation); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_PAGE_AUTOSCROLL_CONTROLLER_H_ |