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| 1 /* | |
| 2 * Copyright (C) 2013 Google, Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * * Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * * Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "core/dom/WheelController.h" | |
| 28 | |
| 29 #include "core/dom/Document.h" | |
| 30 #include "core/events/WheelEvent.h" | |
| 31 #include "core/frame/LocalFrame.h" | |
| 32 #include "core/page/Page.h" | |
| 33 #include "core/page/scrolling/ScrollingCoordinator.h" | |
| 34 | |
| 35 namespace WebCore { | |
| 36 | |
| 37 WheelController::WheelController(Document& document) | |
| 38 : DOMWindowLifecycleObserver(document.domWindow()) | |
| 39 , m_wheelEventHandlerCount(0) | |
| 40 { | |
| 41 } | |
| 42 | |
| 43 WheelController::~WheelController() | |
| 44 { | |
| 45 } | |
| 46 | |
| 47 const char* WheelController::supplementName() | |
| 48 { | |
| 49 return "WheelController"; | |
| 50 } | |
| 51 | |
| 52 WheelController* WheelController::from(Document& document) | |
| 53 { | |
| 54 WheelController* controller = static_cast<WheelController*>(DocumentSuppleme
nt::from(document, supplementName())); | |
| 55 if (!controller) { | |
| 56 controller = new WheelController(document); | |
| 57 DocumentSupplement::provideTo(document, supplementName(), adoptPtrWillBe
Noop(controller)); | |
| 58 } | |
| 59 return controller; | |
| 60 } | |
| 61 | |
| 62 static void wheelEventHandlerCountChanged(Document& document) | |
| 63 { | |
| 64 Page* page = document.page(); | |
| 65 if (!page) | |
| 66 return; | |
| 67 | |
| 68 ScrollingCoordinator* scrollingCoordinator = page->scrollingCoordinator(); | |
| 69 if (!scrollingCoordinator) | |
| 70 return; | |
| 71 | |
| 72 scrollingCoordinator->updateHaveWheelEventHandlers(); | |
| 73 } | |
| 74 | |
| 75 void WheelController::didAddWheelEventHandler(Document& document) | |
| 76 { | |
| 77 ++m_wheelEventHandlerCount; | |
| 78 Page* page = document.page(); | |
| 79 LocalFrame* mainFrame = page ? page->mainFrame() : 0; | |
| 80 if (mainFrame) | |
| 81 mainFrame->notifyChromeClientWheelEventHandlerCountChanged(); | |
| 82 | |
| 83 wheelEventHandlerCountChanged(document); | |
| 84 } | |
| 85 | |
| 86 void WheelController::didRemoveWheelEventHandler(Document& document) | |
| 87 { | |
| 88 ASSERT(m_wheelEventHandlerCount > 0); | |
| 89 --m_wheelEventHandlerCount; | |
| 90 Page* page = document.page(); | |
| 91 LocalFrame* mainFrame = page ? page->mainFrame() : 0; | |
| 92 if (mainFrame) | |
| 93 mainFrame->notifyChromeClientWheelEventHandlerCountChanged(); | |
| 94 | |
| 95 wheelEventHandlerCountChanged(document); | |
| 96 } | |
| 97 | |
| 98 void WheelController::didAddEventListener(DOMWindow* window, const AtomicString&
eventType) | |
| 99 { | |
| 100 if (eventType != EventTypeNames::wheel && eventType != EventTypeNames::mouse
wheel) | |
| 101 return; | |
| 102 | |
| 103 Document* document = window->document(); | |
| 104 ASSERT(document); | |
| 105 didAddWheelEventHandler(*document); | |
| 106 } | |
| 107 | |
| 108 void WheelController::didRemoveEventListener(DOMWindow* window, const AtomicStri
ng& eventType) | |
| 109 { | |
| 110 if (eventType != EventTypeNames::wheel && eventType != EventTypeNames::mouse
wheel) | |
| 111 return; | |
| 112 | |
| 113 Document* document = window->document(); | |
| 114 ASSERT(document); | |
| 115 didRemoveWheelEventHandler(*document); | |
| 116 } | |
| 117 | |
| 118 } // namespace WebCore | |
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Chromium Code Reviews
Issue 225823007:
Migrate wheel events to EventHandlerRegistry (Closed)
Base URL: svn://svn.chromium.org/blink/trunk