| /* |
| * 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/events/EventDispatcher.h" |
| |
| #include "core/dom/ContainerNode.h" |
| #include "core/events/EventDispatchMediator.h" |
| #include "core/events/MouseEvent.h" |
| #include "core/events/ScopedEventQueue.h" |
| #include "core/events/WindowEventContext.h" |
| #include "core/frame/FrameView.h" |
| #include "core/inspector/InspectorInstrumentation.h" |
| #include "core/inspector/InspectorTraceEvents.h" |
| #include "platform/EventDispatchForbiddenScope.h" |
| #include "platform/TraceEvent.h" |
| #include "wtf/RefPtr.h" |
| |
| namespace blink { |
| |
| bool EventDispatcher::dispatchEvent(Node* node, PassRefPtrWillBeRawPtr<EventDispatchMediator> mediator) |
| { |
| TRACE_EVENT0("blink", "EventDispatcher::dispatchEvent"); |
| ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden()); |
| if (!mediator->event()) |
| return true; |
| EventDispatcher dispatcher(node, mediator->event()); |
| return mediator->dispatchEvent(&dispatcher); |
| } |
| |
| EventDispatcher::EventDispatcher(Node* node, PassRefPtrWillBeRawPtr<Event> event) |
| : m_node(node) |
| , m_event(event) |
| #if ENABLE(ASSERT) |
| , 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(); |
| m_event->ensureEventPath().resetWith(m_node.get()); |
| } |
| |
| void EventDispatcher::dispatchScopedEvent(Node* node, PassRefPtrWillBeRawPtr<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(EventPath::eventTargetRespectingTargetRules(node)); |
| ScopedEventQueue::instance()->enqueueEventDispatchMediator(mediator); |
| } |
| |
| void EventDispatcher::dispatchSimulatedClick(Node* node, Event* underlyingEvent, SimulatedClickMouseEventOptions mouseEventOptions) |
| { |
| // This persistent vector doesn't cause leaks, because added Nodes are removed |
| // before dispatchSimulatedClick() returns. This vector is here just to prevent |
| // the code from running into an infinite recursion of dispatchSimulatedClick(). |
| DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<WillBeHeapHashSet<RawPtrWillBeMember<Node> > >, nodesDispatchingSimulatedClicks, (adoptPtrWillBeNoop(new WillBeHeapHashSet<RawPtrWillBeMember<Node> >()))); |
| |
| if (isDisabledFormControl(node)) |
| return; |
| |
| if (nodesDispatchingSimulatedClicks->contains(node)) |
| return; |
| |
| nodesDispatchingSimulatedClicks->add(node); |
| |
| if (mouseEventOptions == SendMouseOverUpDownEvents) |
| EventDispatcher(node, SimulatedMouseEvent::create(EventTypeNames::mouseover, node->document().domWindow(), underlyingEvent)).dispatch(); |
| |
| if (mouseEventOptions != SendNoEvents) { |
| EventDispatcher(node, SimulatedMouseEvent::create(EventTypeNames::mousedown, node->document().domWindow(), underlyingEvent)).dispatch(); |
| node->setActive(true); |
| EventDispatcher(node, SimulatedMouseEvent::create(EventTypeNames::mouseup, node->document().domWindow(), underlyingEvent)).dispatch(); |
| } |
| // Some elements (e.g. the color picker) may set active state to true before |
| // calling this method and expect the state to be reset during the call. |
| node->setActive(false); |
| |
| // always send click |
| EventDispatcher(node, SimulatedMouseEvent::create(EventTypeNames::click, node->document().domWindow(), underlyingEvent)).dispatch(); |
| |
| nodesDispatchingSimulatedClicks->remove(node); |
| } |
| |
| bool EventDispatcher::dispatch() |
| { |
| TRACE_EVENT0("blink", "EventDispatcher::dispatch"); |
| |
| #if ENABLE(ASSERT) |
| ASSERT(!m_eventDispatched); |
| m_eventDispatched = true; |
| #endif |
| |
| m_event->setTarget(EventPath::eventTargetRespectingTargetRules(m_node.get())); |
| ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden()); |
| ASSERT(m_event->target()); |
| WindowEventContext windowEventContext(m_event.get(), m_node.get(), topNodeEventContext()); |
| TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "EventDispatch", "data", InspectorEventDispatchEvent::data(*m_event)); |
| // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing. |
| 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); |
| TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data()); |
| |
| 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 NodeEventContext& 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 NodeEventContext& 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(EventPath::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 NodeEventContext* EventDispatcher::topNodeEventContext() |
| { |
| return m_event->eventPath().isEmpty() ? 0 : &m_event->eventPath().last(); |
| } |
| |
| } |