1/*
2 * Copyright (C) 2006 Zack Rusin <zack@kde.org>
3 * Copyright (C) 2014-2017 Igalia S.L.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "EventHandler.h"
29
30#include "FocusController.h"
31#include "Frame.h"
32#include "FrameView.h"
33#include "KeyboardEvent.h"
34#include "MouseEventWithHitTestResults.h"
35#include "NotImplemented.h"
36#include "Page.h"
37#include "PlatformKeyboardEvent.h"
38#include "PlatformWheelEvent.h"
39#include "RenderWidget.h"
40
41#if ENABLE(DRAG_SUPPORT)
42#include "DataTransfer.h"
43#endif
44
45#if PLATFORM(GTK)
46#include "Scrollbar.h"
47#endif
48
49namespace WebCore {
50
51// GTK+ must scroll horizontally if the mouse pointer is on top of the
52// horizontal scrollbar while scrolling with the wheel; we need to
53// add the deltas and ticks here so that this behavior is consistent
54// for styled scrollbars.
55bool EventHandler::shouldSwapScrollDirection(const HitTestResult& result, const PlatformWheelEvent& event) const
56{
57#if PLATFORM(GTK)
58 FrameView* view = m_frame.view();
59 Scrollbar* scrollbar = view ? view->scrollbarAtPoint(event.position()) : nullptr;
60 if (!scrollbar)
61 scrollbar = result.scrollbar();
62 if (!scrollbar)
63 return false;
64
65 // The directions are already swapped when shift key is pressed, but when scrolling
66 // over scrollbars we always want to follow the scrollbar direction.
67 return scrollbar->orientation() == HorizontalScrollbar ? !event.shiftKey() : event.shiftKey();
68#else
69 UNUSED_PARAM(result);
70 UNUSED_PARAM(event);
71 notImplemented();
72 return false;
73#endif
74}
75
76}
77