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 "WebKitDOMEvent.h"
24#include "WebKitDOMEventPrivate.h"
25#include "WebKitDOMEventTarget.h"
26#include <wtf/HashMap.h>
27
28namespace WebCore {
29
30GObjectEventListener::GObjectEventListener(GObject* target, EventTarget* coreTarget, const char* domEventName, GClosure* handler, bool capture)
31    : EventListener(GObjectEventListenerType)
32    , m_target(target)
33    , m_coreTarget(coreTarget)
34    , m_domEventName(domEventName)
35    , m_handler(handler)
36    , m_capture(capture)
37{
38    ASSERT(m_coreTarget);
39    if (G_CLOSURE_NEEDS_MARSHAL(m_handler.get()))
40        g_closure_set_marshal(m_handler.get(), g_cclosure_marshal_generic);
41    g_object_weak_ref(m_target, reinterpret_cast<GWeakNotify>(GObjectEventListener::gobjectDestroyedCallback), this);
42}
43
44GObjectEventListener::~GObjectEventListener()
45{
46    if (!m_coreTarget)
47        return;
48    g_object_weak_unref(m_target, reinterpret_cast<GWeakNotify>(GObjectEventListener::gobjectDestroyedCallback), this);
49}
50
51void GObjectEventListener::gobjectDestroyed()
52{
53    ASSERT(m_coreTarget);
54
55    // We must set m_coreTarget to null, because removeEventListener
56    // may call the destructor as a side effect and we must be in the
57    // proper state to prevent g_object_weak_unref.
58    EventTarget* target = m_coreTarget;
59    m_coreTarget = 0;
60    target->removeEventListener(m_domEventName.data(), this, m_capture);
61    m_handler = 0;
62}
63
64void GObjectEventListener::handleEvent(ScriptExecutionContext*, Event* event)
65{
66    GValue parameters[2] = { G_VALUE_INIT, G_VALUE_INIT };
67    g_value_init(&parameters[0], WEBKIT_DOM_TYPE_EVENT_TARGET);
68    g_value_set_object(&parameters[0], m_target);
69
70    GRefPtr<WebKitDOMEvent> domEvent = adoptGRef(WebKit::kit(event));
71    g_value_init(&parameters[1], WEBKIT_DOM_TYPE_EVENT);
72    g_value_set_object(&parameters[1], domEvent.get());
73
74    g_closure_invoke(m_handler.get(), 0, 2, parameters, NULL);
75    g_value_unset(parameters + 0);
76    g_value_unset(parameters + 1);
77}
78
79bool GObjectEventListener::operator==(const EventListener& listener)
80{
81    if (const GObjectEventListener* gobjectEventListener = GObjectEventListener::cast(&listener))
82        return m_target == gobjectEventListener->m_target
83            && reinterpret_cast<GCClosure*>(m_handler.get())->callback == reinterpret_cast<GCClosure*>(gobjectEventListener->m_handler.get())->callback;
84
85    return false;
86}
87
88}
89