remove updateTouchEventTargetRectsIfNeeded

sky/engine/core/frame/EventHandlerRegistry.cpp

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-#include "core/frame/EventHandlerRegistry.h"
-
-#include "core/events/ThreadLocalEventNames.h"
-#include "core/frame/LocalDOMWindow.h"
-#include "core/frame/LocalFrame.h"
-#include "core/page/Chrome.h"
-#include "core/page/ChromeClient.h"
-#include "core/page/Page.h"
-#include "core/page/scrolling/ScrollingCoordinator.h"
-
-namespace blink {
-
-EventHandlerRegistry::EventHandlerRegistry(FrameHost& frameHost)
-    : m_frameHost(frameHost)
-{
-}
-
-EventHandlerRegistry::~EventHandlerRegistry()
-{
-    checkConsistency();
-}
-
-bool EventHandlerRegistry::eventTypeToClass(const AtomicString& eventType, EventHandlerClass* result)
-{
-    if (eventType == EventTypeNames::scroll) {
-        *result = ScrollEvent;
-    } else if (eventType == EventTypeNames::wheel || eventType == EventTypeNames::mousewheel) {
-        *result = WheelEvent;
-    } else if (isTouchEventType(eventType)) {
-        *result = TouchEvent;
-#if ENABLE(ASSERT)
-    } else if (eventType == EventTypeNames::load || eventType == EventTypeNames::mousemove || eventType == EventTypeNames::touchstart) {
-        *result = EventsForTesting;
-#endif
-    } else {
-        return false;
-    }
-    return true;
-}
-
-const EventTargetSet* EventHandlerRegistry::eventHandlerTargets(EventHandlerClass handlerClass) const
-{
-    checkConsistency();
-    return &m_targets[handlerClass];
-}
-
-bool EventHandlerRegistry::hasEventHandlers(EventHandlerClass handlerClass) const
-{
-    checkConsistency();
-    return m_targets[handlerClass].size();
-}
-
-bool EventHandlerRegistry::updateEventHandlerTargets(ChangeOperation op, EventHandlerClass handlerClass, EventTarget* target)
-{
-    EventTargetSet* targets = &m_targets[handlerClass];
-    if (op == Add) {
-        if (!targets->add(target).isNewEntry) {
-            // Just incremented refcount, no real change.
-            return false;
-        }
-    } else {
-        ASSERT(op == Remove || op == RemoveAll);
-        ASSERT(op == RemoveAll || targets->contains(target));
-
-        if (op == RemoveAll) {
-            if (!targets->contains(target))
-                return false;
-            targets->removeAll(target);
-        } else {
-            if (!targets->remove(target)) {
-                // Just decremented refcount, no real update.
-                return false;
-            }
-        }
-    }
-    return true;
-}
-
-void EventHandlerRegistry::updateEventHandlerInternal(ChangeOperation op, EventHandlerClass handlerClass, EventTarget* target)
-{
-    bool hadHandlers = m_targets[handlerClass].size();
-    bool targetSetChanged = updateEventHandlerTargets(op, handlerClass, target);
-    bool hasHandlers = m_targets[handlerClass].size();
-
-    if (hadHandlers != hasHandlers)
-        notifyHasHandlersChanged(handlerClass, hasHandlers);
-
-    if (targetSetChanged)
-        notifyDidAddOrRemoveEventHandlerTarget(handlerClass);
-}
-
-void EventHandlerRegistry::updateEventHandlerOfType(ChangeOperation op, const AtomicString& eventType, EventTarget* target)
-{
-    EventHandlerClass handlerClass;
-    if (!eventTypeToClass(eventType, &handlerClass))
-        return;
-    updateEventHandlerInternal(op, handlerClass, target);
-}
-
-void EventHandlerRegistry::didAddEventHandler(EventTarget& target, const AtomicString& eventType)
-{
-    updateEventHandlerOfType(Add, eventType, &target);
-}
-
-void EventHandlerRegistry::didRemoveEventHandler(EventTarget& target, const AtomicString& eventType)
-{
-    updateEventHandlerOfType(Remove, eventType, &target);
-}
-
-void EventHandlerRegistry::didAddEventHandler(EventTarget& target, EventHandlerClass handlerClass)
-{
-    updateEventHandlerInternal(Add, handlerClass, &target);
-}
-
-void EventHandlerRegistry::didRemoveEventHandler(EventTarget& target, EventHandlerClass handlerClass)
-{
-    updateEventHandlerInternal(Remove, handlerClass, &target);
-}
-
-void EventHandlerRegistry::didMoveIntoFrameHost(EventTarget& target)
-{
-    if (!target.hasEventListeners())
-        return;
-
-    Vector<AtomicString> eventTypes = target.eventTypes();
-    for (size_t i = 0; i < eventTypes.size(); ++i) {
-        EventHandlerClass handlerClass;
-        if (!eventTypeToClass(eventTypes[i], &handlerClass))
-            continue;
-        for (unsigned count = target.getEventListeners(eventTypes[i]).size(); count > 0; --count)
-            didAddEventHandler(target, handlerClass);
-    }
-}
-
-void EventHandlerRegistry::didMoveOutOfFrameHost(EventTarget& target)
-{
-    didRemoveAllEventHandlers(target);
-}
-
-void EventHandlerRegistry::didMoveBetweenFrameHosts(EventTarget& target, FrameHost* oldFrameHost, FrameHost* newFrameHost)
-{
-    ASSERT(newFrameHost != oldFrameHost);
-    for (size_t i = 0; i < EventHandlerClassCount; ++i) {
-        EventHandlerClass handlerClass = static_cast<EventHandlerClass>(i);
-        const EventTargetSet* targets = &oldFrameHost->eventHandlerRegistry().m_targets[handlerClass];
-        for (unsigned count = targets->count(&target); count > 0; --count)
-            newFrameHost->eventHandlerRegistry().didAddEventHandler(target, handlerClass);
-        oldFrameHost->eventHandlerRegistry().didRemoveAllEventHandlers(target);
-    }
-}
-
-void EventHandlerRegistry::didRemoveAllEventHandlers(EventTarget& target)
-{
-    for (size_t i = 0; i < EventHandlerClassCount; ++i) {
-        EventHandlerClass handlerClass = static_cast<EventHandlerClass>(i);
-        updateEventHandlerInternal(RemoveAll, handlerClass, &target);
-    }
-}
-
-void EventHandlerRegistry::notifyHasHandlersChanged(EventHandlerClass handlerClass, bool hasActiveHandlers)
-{
-    switch (handlerClass) {
-    // FIXME(sky): Remove these enums from the EventHandlerClass entirely.
-    case ScrollEvent:
-    case WheelEvent:
-        break;
-    case TouchEvent:
-        m_frameHost.chrome().client().needTouchEvents(hasActiveHandlers);
-        break;
-#if ENABLE(ASSERT)
-    case EventsForTesting:
-        break;
-#endif
-    default:
-        ASSERT_NOT_REACHED();
-        break;
-    }
-}
-
-void EventHandlerRegistry::notifyDidAddOrRemoveEventHandlerTarget(EventHandlerClass handlerClass)
-{
-    ScrollingCoordinator* scrollingCoordinator = m_frameHost.page().scrollingCoordinator();
-    if (scrollingCoordinator && handlerClass == TouchEvent)
-        scrollingCoordinator->touchEventTargetRectsDidChange();
-}
-
-void EventHandlerRegistry::documentDetached(Document& document)
-{
-    // Remove all event targets under the detached document.
-    for (size_t handlerClassIndex = 0; handlerClassIndex < EventHandlerClassCount; ++handlerClassIndex) {
-        EventHandlerClass handlerClass = static_cast<EventHandlerClass>(handlerClassIndex);
-        Vector<EventTarget*> targetsToRemove;
-        const EventTargetSet* targets = &m_targets[handlerClass];
-        for (EventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
-            if (Node* node = iter->key->toNode()) {
-                if (node->document() == &document) {
-                    targetsToRemove.append(iter->key);
-                    break;
-                }
-            } else if (iter->key->toDOMWindow()) {
-                // DOMWindows may outlive their documents, so we shouldn't remove their handlers
-                // here.
-            } else {
-                ASSERT_NOT_REACHED();
-            }
-        }
-        for (size_t i = 0; i < targetsToRemove.size(); ++i)
-            updateEventHandlerInternal(RemoveAll, handlerClass, targetsToRemove[i]);
-    }
-}
-
-void EventHandlerRegistry::checkConsistency() const
-{
-#if ENABLE(ASSERT)
-    for (size_t i = 0; i < EventHandlerClassCount; ++i) {
-        EventHandlerClass handlerClass = static_cast<EventHandlerClass>(i);
-        const EventTargetSet* targets = &m_targets[handlerClass];
-        for (EventTargetSet::const_iterator iter = targets->begin(); iter != targets->end(); ++iter) {
-            if (Node* node = iter->key->toNode()) {
-                // See the comment for |documentDetached| if either of these assertions fails.
-                ASSERT(node->document().frameHost());
-                ASSERT(node->document().frameHost() == &m_frameHost);
-            } else if (LocalDOMWindow* window = iter->key->toDOMWindow()) {
-                // If any of these assertions fail, LocalDOMWindow failed to unregister its handlers
-                // properly.
-                ASSERT(window->frame());
-                ASSERT(window->frame()->host());
-                ASSERT(window->frame()->host() == &m_frameHost);
-            }
-        }
-    }
-#endif // ENABLE(ASSERT)
-}
-
-} // namespace blink