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(¶meters[0], WEBKIT_DOM_TYPE_EVENT_TARGET); 68 g_value_set_object(¶meters[0], m_target); 69 70 GRefPtr<WebKitDOMEvent> domEvent = adoptGRef(WebKit::kit(event)); 71 g_value_init(¶meters[1], WEBKIT_DOM_TYPE_EVENT); 72 g_value_set_object(¶meters[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