chromium/third_party/blink/renderer/core/page/autoscroll_controller.cc

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights
 * reserved.
 * Copyright (C) 2006 Alexey Proskuryakov ([email protected])
 * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
 *
 * 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.
 */

#include "third_party/blink/renderer/core/page/autoscroll_controller.h"

#include "third_party/blink/renderer/core/dom/node_computed_style.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/local_frame_client.h"
#include "third_party/blink/renderer/core/frame/local_frame_view.h"
#include "third_party/blink/renderer/core/frame/visual_viewport.h"
#include "third_party/blink/renderer/core/html/html_frame_owner_element.h"
#include "third_party/blink/renderer/core/input/event_handler.h"
#include "third_party/blink/renderer/core/input/scroll_manager.h"
#include "third_party/blink/renderer/core/layout/hit_test_result.h"
#include "third_party/blink/renderer/core/layout/layout_box.h"
#include "third_party/blink/renderer/core/page/chrome_client.h"
#include "third_party/blink/renderer/core/page/page.h"
#include "third_party/blink/renderer/core/scroll/scroll_types.h"
#include "third_party/blink/renderer/platform/cursors.h"
#include "ui/base/cursor/cursor.h"

namespace blink {

// Delay time in second for start autoscroll if pointer is in border edge of
// scrollable element.
constexpr base::TimeDelta kAutoscrollDelay = …;

static const int kNoMiddleClickAutoscrollRadius = …;

static const ui::Cursor& MiddleClickAutoscrollCursor(
    const gfx::Vector2dF& velocity,
    bool scroll_vert,
    bool scroll_horiz) { … }

AutoscrollController::AutoscrollController(Page& page) : … { … }

void AutoscrollController::Trace(Visitor* visitor) const { … }

bool AutoscrollController::SelectionAutoscrollInProgress() const { … }

bool AutoscrollController::AutoscrollInProgress() const { … }

bool AutoscrollController::AutoscrollInProgressFor(
    const LayoutBox* layout_object) const { … }

void AutoscrollController::StartAutoscrollForSelection(
    LayoutObject* layout_object) { … }

void AutoscrollController::StopAutoscroll() { … }

void AutoscrollController::StopAutoscrollIfNeeded(LayoutObject* layout_object) { … }

void AutoscrollController::UpdateDragAndDrop(Node* drop_target_node,
                                             const gfx::PointF& event_position,
                                             base::TimeTicks event_time) { … }

bool CanScrollDirection(LayoutBox* layout_box,
                        Page* page,
                        ScrollOrientation orientation) { … }

void AutoscrollController::HandleMouseMoveForMiddleClickAutoscroll(
    LocalFrame* frame,
    const gfx::PointF& position_global,
    bool is_middle_button) { … }

void AutoscrollController::HandleMouseReleaseForMiddleClickAutoscroll(
    LocalFrame* frame,
    bool is_middle_button) { … }

void AutoscrollController::StopMiddleClickAutoscroll(LocalFrame* frame) { … }

bool AutoscrollController::MiddleClickAutoscrollInProgress() const { … }

void AutoscrollController::StartMiddleClickAutoscroll(
    LocalFrame* frame,
    LayoutBox* scrollable,
    const gfx::PointF& position,
    const gfx::PointF& position_global) { … }

void AutoscrollController::Animate() { … }

void AutoscrollController::ScheduleMainThreadAnimation() { … }

void AutoscrollController::UpdateCachedAutoscrollForSelectionState(
    bool autoscroll_selection) { … }

bool AutoscrollController::IsAutoscrolling() const { … }

}  // namespace blink