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comparison: dom/events/AsyncEventDispatcher.h
dom/events/AsyncEventDispatcher.h
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef mozilla_AsyncEventDispatcher_h_ | |
| 7 #define mozilla_AsyncEventDispatcher_h_ | |
| 8 | |
| 9 #include "mozilla/Attributes.h" | |
| 10 #include "nsCOMPtr.h" | |
| 11 #include "nsIDocument.h" | |
| 12 #include "nsIDOMEvent.h" | |
| 13 #include "nsINode.h" | |
| 14 #include "nsString.h" | |
| 15 #include "nsThreadUtils.h" | |
| 16 | |
| 17 namespace mozilla { | |
| 18 | |
| 19 /** | |
| 20 * Use nsAsyncDOMEvent to fire a DOM event that requires safe a stable DOM. | |
| 21 * For example, you may need to fire an event from within layout, but | |
| 22 * want to ensure that the event handler doesn't mutate the DOM at | |
| 23 * the wrong time, in order to avoid resulting instability. | |
| 24 */ | |
| 25 | |
| 26 class AsyncEventDispatcher : public nsRunnable | |
| 27 { | |
| 28 public: | |
| 29 AsyncEventDispatcher(nsINode* aEventNode, const nsAString& aEventType, | |
| 30 bool aBubbles, bool aDispatchChromeOnly) | |
| 31 : mEventNode(aEventNode) | |
| 32 , mEventType(aEventType) | |
| 33 , mBubbles(aBubbles) | |
| 34 , mDispatchChromeOnly(aDispatchChromeOnly) | |
| 35 { | |
| 36 } | |
| 37 | |
| 38 AsyncEventDispatcher(nsINode* aEventNode, nsIDOMEvent* aEvent) | |
| 39 : mEventNode(aEventNode) | |
| 40 , mEvent(aEvent) | |
| 41 , mDispatchChromeOnly(false) | |
| 42 { | |
| 43 } | |
| 44 | |
| 45 AsyncEventDispatcher(nsINode* aEventNode, WidgetEvent& aEvent); | |
| 46 | |
| 47 NS_IMETHOD Run() MOZ_OVERRIDE; | |
| 48 nsresult PostDOMEvent(); | |
| 49 void RunDOMEventWhenSafe(); | |
| 50 | |
| 51 nsCOMPtr<nsINode> mEventNode; | |
| 52 nsCOMPtr<nsIDOMEvent> mEvent; | |
| 53 nsString mEventType; | |
| 54 bool mBubbles; | |
| 55 bool mDispatchChromeOnly; | |
| 56 }; | |
| 57 | |
| 58 class LoadBlockingAsyncEventDispatcher MOZ_FINAL : public AsyncEventDispatcher | |
| 59 { | |
| 60 public: | |
| 61 LoadBlockingAsyncEventDispatcher(nsINode* aEventNode, | |
| 62 const nsAString& aEventType, | |
| 63 bool aBubbles, bool aDispatchChromeOnly) | |
| 64 : AsyncEventDispatcher(aEventNode, aEventType, | |
| 65 aBubbles, aDispatchChromeOnly) | |
| 66 , mBlockedDoc(aEventNode->OwnerDoc()) | |
| 67 { | |
| 68 if (mBlockedDoc) { | |
| 69 mBlockedDoc->BlockOnload(); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 LoadBlockingAsyncEventDispatcher(nsINode* aEventNode, nsIDOMEvent* aEvent) | |
| 74 : AsyncEventDispatcher(aEventNode, aEvent) | |
| 75 , mBlockedDoc(aEventNode->OwnerDoc()) | |
| 76 { | |
| 77 if (mBlockedDoc) { | |
| 78 mBlockedDoc->BlockOnload(); | |
| 79 } | |
| 80 } | |
| 81 | |
| 82 ~LoadBlockingAsyncEventDispatcher(); | |
| 83 | |
| 84 private: | |
| 85 nsCOMPtr<nsIDocument> mBlockedDoc; | |
| 86 }; | |
| 87 | |
| 88 } // namespace mozilla | |
| 89 | |
| 90 #endif // mozilla_AsyncEventDispatcher_h_ |
