| /* |
| * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 1999 Antti Koivisto (koivisto@kde.org) |
| * (C) 2001 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies) |
| * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) |
| * Copyright (C) 2011 Google Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| #include "core/dom/EventDispatcher.h" |
| |
| #include "core/dom/ContainerNode.h" |
| #include "core/dom/EventContext.h" |
| #include "core/dom/EventDispatchMediator.h" |
| #include "core/dom/EventRetargeter.h" |
| #include "core/dom/MouseEvent.h" |
| #include "core/dom/ScopedEventQueue.h" |
| #include "core/dom/WindowEventContext.h" |
| #include "core/inspector/InspectorInstrumentation.h" |
| #include "core/page/FrameView.h" |
| #include "wtf/RefPtr.h" |
| |
| namespace WebCore { |
| |
| static HashSet<Node*>* gNodesDispatchingSimulatedClicks = 0; |
| |
| bool EventDispatcher::dispatchEvent(Node* node, PassRefPtr<EventDispatchMediator> mediator) |
| { |
| ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden()); |
| if (!mediator->event()) |
| return true; |
| EventDispatcher dispatcher(node, mediator->event()); |
| return mediator->dispatchEvent(&dispatcher); |
| } |
| |
| EventDispatcher::EventDispatcher(Node* node, PassRefPtr<Event> event) |
| : m_node(node) |
| , m_event(event) |
| #ifndef NDEBUG |
| , m_eventDispatched(false) |
| #endif |
| { |
| ASSERT(node); |
| ASSERT(m_event.get()); |
| ASSERT(!m_event->type().isNull()); // JavaScript code can create an event with an empty name, but not null. |
| m_view = node->document().view(); |
| EventRetargeter::ensureEventPath(m_node.get(), m_event.get()); |
| } |
| |
| void EventDispatcher::dispatchScopedEvent(Node* node, PassRefPtr<EventDispatchMediator> mediator) |
| { |
| // We need to set the target here because it can go away by the time we actually fire the event. |
| mediator->event()->setTarget(EventRetargeter::eventTargetRespectingTargetRules(node)); |
| ScopedEventQueue::instance()->enqueueEventDispatchMediator(mediator); |
| } |
| |
| void EventDispatcher::dispatchSimulatedClick(Node* node, Event* underlyingEvent, SimulatedClickMouseEventOptions mouseEventOptions, SimulatedClickVisualOptions visualOptions) |
| { |
| if (isDisabledFormControl(node)) |
| return; |
| |
| if (!gNodesDispatchingSimulatedClicks) |
| gNodesDispatchingSimulatedClicks = new HashSet<Node*>; |
| else if (gNodesDispatchingSimulatedClicks->contains(node)) |
| return; |
| |
| gNodesDispatchingSimulatedClicks->add(node); |
| |
| if (mouseEventOptions == SendMouseOverUpDownEvents) |
| EventDispatcher(node, SimulatedMouseEvent::create(eventNames().mouseoverEvent, node->document().defaultView(), underlyingEvent)).dispatch(); |
| |
| if (mouseEventOptions != SendNoEvents) |
| EventDispatcher(node, SimulatedMouseEvent::create(eventNames().mousedownEvent, node->document().defaultView(), underlyingEvent)).dispatch(); |
| node->setActive(true, visualOptions == ShowPressedLook); |
| if (mouseEventOptions != SendNoEvents) |
| EventDispatcher(node, SimulatedMouseEvent::create(eventNames().mouseupEvent, node->document().defaultView(), underlyingEvent)).dispatch(); |
| node->setActive(false); |
| |
| // always send click |
| EventDispatcher(node, SimulatedMouseEvent::create(eventNames().clickEvent, node->document().defaultView(), underlyingEvent)).dispatch(); |
| |
| gNodesDispatchingSimulatedClicks->remove(node); |
| } |
| |
| bool EventDispatcher::dispatch() |
| { |
| #ifndef NDEBUG |
| ASSERT(!m_eventDispatched); |
| m_eventDispatched = true; |
| #endif |
| ChildNodesLazySnapshot::takeChildNodesLazySnapshot(); |
| |
| m_event->setTarget(EventRetargeter::eventTargetRespectingTargetRules(m_node.get())); |
| ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden()); |
| ASSERT(m_event->target()); |
| WindowEventContext windowEventContext(m_event.get(), m_node.get(), topEventContext()); |
| InspectorInstrumentationCookie cookie = InspectorInstrumentation::willDispatchEvent(&m_node->document(), *m_event, windowEventContext.window(), m_node.get(), m_event->eventPath()); |
| |
| void* preDispatchEventHandlerResult; |
| if (dispatchEventPreProcess(preDispatchEventHandlerResult) == ContinueDispatching) |
| if (dispatchEventAtCapturing(windowEventContext) == ContinueDispatching) |
| if (dispatchEventAtTarget() == ContinueDispatching) |
| dispatchEventAtBubbling(windowEventContext); |
| dispatchEventPostProcess(preDispatchEventHandlerResult); |
| |
| // Ensure that after event dispatch, the event's target object is the |
| // outermost shadow DOM boundary. |
| m_event->setTarget(windowEventContext.target()); |
| m_event->setCurrentTarget(0); |
| InspectorInstrumentation::didDispatchEvent(cookie); |
| |
| return !m_event->defaultPrevented(); |
| } |
| |
| inline EventDispatchContinuation EventDispatcher::dispatchEventPreProcess(void*& preDispatchEventHandlerResult) |
| { |
| // Give the target node a chance to do some work before DOM event handlers get a crack. |
| preDispatchEventHandlerResult = m_node->preDispatchEventHandler(m_event.get()); |
| return (m_event->eventPath().isEmpty() || m_event->propagationStopped()) ? DoneDispatching : ContinueDispatching; |
| } |
| |
| inline EventDispatchContinuation EventDispatcher::dispatchEventAtCapturing(WindowEventContext& windowEventContext) |
| { |
| // Trigger capturing event handlers, starting at the top and working our way down. |
| m_event->setEventPhase(Event::CAPTURING_PHASE); |
| |
| if (windowEventContext.handleLocalEvents(m_event.get()) && m_event->propagationStopped()) |
| return DoneDispatching; |
| |
| for (size_t i = m_event->eventPath().size() - 1; i > 0; --i) { |
| const EventContext& eventContext = *m_event->eventPath()[i]; |
| if (eventContext.currentTargetSameAsTarget()) |
| continue; |
| eventContext.handleLocalEvents(m_event.get()); |
| if (m_event->propagationStopped()) |
| return DoneDispatching; |
| } |
| |
| return ContinueDispatching; |
| } |
| |
| inline EventDispatchContinuation EventDispatcher::dispatchEventAtTarget() |
| { |
| m_event->setEventPhase(Event::AT_TARGET); |
| m_event->eventPath()[0]->handleLocalEvents(m_event.get()); |
| return m_event->propagationStopped() ? DoneDispatching : ContinueDispatching; |
| } |
| |
| inline void EventDispatcher::dispatchEventAtBubbling(WindowEventContext& windowContext) |
| { |
| // Trigger bubbling event handlers, starting at the bottom and working our way up. |
| size_t size = m_event->eventPath().size(); |
| for (size_t i = 1; i < size; ++i) { |
| const EventContext& eventContext = *m_event->eventPath()[i]; |
| if (eventContext.currentTargetSameAsTarget()) |
| m_event->setEventPhase(Event::AT_TARGET); |
| else if (m_event->bubbles() && !m_event->cancelBubble()) |
| m_event->setEventPhase(Event::BUBBLING_PHASE); |
| else |
| continue; |
| eventContext.handleLocalEvents(m_event.get()); |
| if (m_event->propagationStopped()) |
| return; |
| } |
| if (m_event->bubbles() && !m_event->cancelBubble()) { |
| m_event->setEventPhase(Event::BUBBLING_PHASE); |
| windowContext.handleLocalEvents(m_event.get()); |
| } |
| } |
| |
| inline void EventDispatcher::dispatchEventPostProcess(void* preDispatchEventHandlerResult) |
| { |
| m_event->setTarget(EventRetargeter::eventTargetRespectingTargetRules(m_node.get())); |
| m_event->setCurrentTarget(0); |
| m_event->setEventPhase(0); |
| |
| // Pass the data from the preDispatchEventHandler to the postDispatchEventHandler. |
| m_node->postDispatchEventHandler(m_event.get(), preDispatchEventHandlerResult); |
| |
| // Call default event handlers. While the DOM does have a concept of preventing |
| // default handling, the detail of which handlers are called is an internal |
| // implementation detail and not part of the DOM. |
| if (!m_event->defaultPrevented() && !m_event->defaultHandled()) { |
| // Non-bubbling events call only one default event handler, the one for the target. |
| m_node->willCallDefaultEventHandler(*m_event); |
| m_node->defaultEventHandler(m_event.get()); |
| ASSERT(!m_event->defaultPrevented()); |
| if (m_event->defaultHandled()) |
| return; |
| // For bubbling events, call default event handlers on the same targets in the |
| // same order as the bubbling phase. |
| if (m_event->bubbles()) { |
| size_t size = m_event->eventPath().size(); |
| for (size_t i = 1; i < size; ++i) { |
| m_event->eventPath()[i]->node()->willCallDefaultEventHandler(*m_event); |
| m_event->eventPath()[i]->node()->defaultEventHandler(m_event.get()); |
| ASSERT(!m_event->defaultPrevented()); |
| if (m_event->defaultHandled()) |
| return; |
| } |
| } |
| } |
| } |
| |
| const EventContext* EventDispatcher::topEventContext() |
| { |
| return m_event->eventPath().isEmpty() ? 0 : m_event->eventPath().last().get(); |
| } |
| |
| } |