1/*
2 *  Copyright (C) 2010, 2011 Igalia S.L.
3 *
4 *  This library is free software; you can redistribute it and/or
5 *  modify it under the terms of the GNU Lesser General Public
6 *  License as published by the Free Software Foundation; either
7 *  version 2 of the License, or (at your option) any later version.
8 *
9 *  This library is distributed in the hope that it will be useful,
10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 *  Lesser General Public License for more details.
13 *
14 *  You should have received a copy of the GNU Lesser General Public
15 *  License along with this library; if not, write to the Free Software
16 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
17 */
18
19#include "config.h"
20#include "GObjectEventListener.h"
21
22#include "Event.h"
23#include "EventListener.h"
24#include "webkit/WebKitDOMEvent.h"
25#include "webkit/WebKitDOMEventPrivate.h"
26#include <glib-object.h>
27#include <glib.h>
28#include <wtf/HashMap.h>
29
30namespace WebCore {
31
32typedef void (*GObjectEventListenerCallback)(GObject*, WebKitDOMEvent*, void*);
33
34GObjectEventListener::GObjectEventListener(GObject* object, EventTarget* target, const char* domEventName, GCallback handler, bool capture, void* userData)
35    : EventListener(GObjectEventListenerType)
36    , m_object(object)
37    , m_coreTarget(target)
38    , m_domEventName(domEventName)
39    , m_handler(handler)
40    , m_capture(capture)
41    , m_userData(userData)
42{
43    ASSERT(m_coreTarget);
44    g_object_weak_ref(object, reinterpret_cast<GWeakNotify>(GObjectEventListener::gobjectDestroyedCallback), this);
45}
46
47GObjectEventListener::~GObjectEventListener()
48{
49    if (!m_coreTarget)
50        return;
51    g_object_weak_unref(m_object, reinterpret_cast<GWeakNotify>(GObjectEventListener::gobjectDestroyedCallback), this);
52}
53
54void GObjectEventListener::gobjectDestroyed()
55{
56    ASSERT(m_coreTarget);
57
58    // We must set m_coreTarget to null, because removeEventListener
59    // may call the destructor as a side effect and we must be in the
60    // proper state to prevent g_object_weak_unref.
61    EventTarget* target = m_coreTarget;
62    m_coreTarget = 0;
63    target->removeEventListener(m_domEventName.data(), this, m_capture);
64}
65
66void GObjectEventListener::handleEvent(ScriptExecutionContext*, Event* event)
67{
68    WebKitDOMEvent* gobjectEvent = WEBKIT_DOM_EVENT(WebKit::kit(event));
69    reinterpret_cast<GObjectEventListenerCallback>(m_handler)(m_object, gobjectEvent, m_userData);
70    g_object_unref(gobjectEvent);
71}
72
73bool GObjectEventListener::operator==(const EventListener& listener)
74{
75    if (const GObjectEventListener* gobjectEventListener = GObjectEventListener::cast(&listener))
76        return m_object == gobjectEventListener->m_object && m_handler == gobjectEventListener->m_handler;
77
78    return false;
79}
80
81}
82