File: EventContext.cpp

package info (click to toggle)
webkit2gtk 2.48.5-1
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 429,764 kB
  • sloc: cpp: 3,697,587; javascript: 194,444; ansic: 169,997; python: 46,499; asm: 19,295; ruby: 18,528; perl: 16,602; xml: 4,650; yacc: 2,360; sh: 2,098; java: 1,993; lex: 1,327; pascal: 366; makefile: 298
file content (119 lines) | stat: -rw-r--r-- 4,074 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
/*
 * Copyright (C) 2010 Google Inc. All Rights Reserved.
 * Copyright (C) 2017 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 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 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 "config.h"
#include "EventContext.h"

#include "Document.h"
#include "EventNames.h"
#include "FocusEvent.h"
#include "HTMLFieldSetElement.h"
#include "HTMLFormElement.h"
#include "LocalDOMWindow.h"
#include "MouseEvent.h"
#include "TouchEvent.h"
#include <wtf/TZoneMallocInlines.h>

namespace WebCore {

WTF_MAKE_TZONE_ALLOCATED_IMPL(EventContext);

void EventContext::handleLocalEvents(Event& event, EventInvokePhase phase) const
{
    event.setTarget(m_target.copyRef());
    event.setCurrentTarget(m_currentTarget.copyRef(), m_currentTargetIsInShadowTree);

    if (m_relatedTargetIsSet) {
        ASSERT(!m_relatedTarget || isMouseOrFocusEventContext() || isWindowContext());
        event.setRelatedTarget(m_relatedTarget.copyRef());
    }

#if ENABLE(TOUCH_EVENTS)
    if (m_type == Type::Touch) {

#if ASSERT_ENABLED
        auto checkReachability = [&](const Ref<TouchList>& touchList) {
            size_t length = touchList->length();
            for (size_t i = 0; i < length; ++i)
                ASSERT(!isUnreachableNode(downcast<Node>(touchList->item(i)->target())));
        };
        checkReachability(*m_touches);
        checkReachability(*m_targetTouches);
        checkReachability(*m_changedTouches);
#endif

        auto& touchEvent = downcast<TouchEvent>(event);
        touchEvent.setTouches(m_touches.get());
        touchEvent.setTargetTouches(m_targetTouches.get());
        touchEvent.setChangedTouches(m_changedTouches.get());
    }
#endif

    if (!m_node || UNLIKELY(m_type == Type::Window)) {
        protectedCurrentTarget()->fireEventListeners(event, phase);
        return;
    }

    if (UNLIKELY(m_contextNodeIsFormElement)) {
        ASSERT(is<HTMLFormElement>(*m_node));
        auto& eventNames = WebCore::eventNames();
        if ((event.type() == eventNames.submitEvent || event.type() == eventNames.resetEvent)
            && event.eventPhase() != Event::CAPTURING_PHASE && event.target() != m_node && is<Node>(event.target())) {
            event.stopPropagation();
            return;
        }
    }

    if (!m_node->hasEventTargetData())
        return;

    protectedNode()->fireEventListeners(event, phase);
}

#if ENABLE(TOUCH_EVENTS)

void EventContext::initializeTouchLists()
{
    m_touches = TouchList::create();
    m_targetTouches = TouchList::create();
    m_changedTouches = TouchList::create();
}

#endif // ENABLE(TOUCH_EVENTS)

#if ASSERT_ENABLED

bool EventContext::isUnreachableNode(EventTarget* target) const
{
    // FIXME: Checks also for SVG elements.
    auto* node = dynamicDowncast<Node>(target);
    return node && !node->isSVGElement() && m_node && m_node->isClosedShadowHidden(*node);
}

#endif

}