The Tor Browser / file comparison
comparison: content/base/src/mozAutoDocUpdate.h
content/base/src/mozAutoDocUpdate.h
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
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| -1:000000000000 | 0:1fbb7f671416 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef mozAutoDocUpdate_h_ | |
| 6 #define mozAutoDocUpdate_h_ | |
| 7 | |
| 8 #include "nsContentUtils.h" // For AddScriptBlocker() and RemoveScriptBlocker(). | |
| 9 #include "nsIDocument.h" | |
| 10 #include "nsIDocumentObserver.h" | |
| 11 | |
| 12 /** | |
| 13 * Helper class to automatically handle batching of document updates. This | |
| 14 * class will call BeginUpdate on construction and EndUpdate on destruction on | |
| 15 * the given document with the given update type. The document could be null, | |
| 16 * in which case no updates will be called. The constructor also takes a | |
| 17 * boolean that can be set to false to prevent notifications. | |
| 18 */ | |
| 19 class MOZ_STACK_CLASS mozAutoDocUpdate | |
| 20 { | |
| 21 public: | |
| 22 mozAutoDocUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType, | |
| 23 bool aNotify) : | |
| 24 mDocument(aNotify ? aDocument : nullptr), | |
| 25 mUpdateType(aUpdateType) | |
| 26 { | |
| 27 if (mDocument) { | |
| 28 mDocument->BeginUpdate(mUpdateType); | |
| 29 } | |
| 30 else { | |
| 31 nsContentUtils::AddScriptBlocker(); | |
| 32 } | |
| 33 } | |
| 34 | |
| 35 ~mozAutoDocUpdate() | |
| 36 { | |
| 37 if (mDocument) { | |
| 38 mDocument->EndUpdate(mUpdateType); | |
| 39 } | |
| 40 else { | |
| 41 nsContentUtils::RemoveScriptBlocker(); | |
| 42 } | |
| 43 } | |
| 44 | |
| 45 private: | |
| 46 nsCOMPtr<nsIDocument> mDocument; | |
| 47 nsUpdateType mUpdateType; | |
| 48 }; | |
| 49 | |
| 50 #define MOZ_AUTO_DOC_UPDATE_PASTE2(tok,line) tok##line | |
| 51 #define MOZ_AUTO_DOC_UPDATE_PASTE(tok,line) \ | |
| 52 MOZ_AUTO_DOC_UPDATE_PASTE2(tok,line) | |
| 53 #define MOZ_AUTO_DOC_UPDATE(doc,type,notify) \ | |
| 54 mozAutoDocUpdate MOZ_AUTO_DOC_UPDATE_PASTE(_autoDocUpdater_, __LINE__) \ | |
| 55 (doc,type,notify) | |
| 56 | |
| 57 | |
| 58 /** | |
| 59 * Creates an update batch only under certain conditions. | |
| 60 * Use this rather than mozAutoDocUpdate when you expect inner updates | |
| 61 * to notify but you don't always want to spec cycles creating a batch. | |
| 62 * This is needed to avoid having this batch always create a blocker, | |
| 63 * but then have inner mozAutoDocUpdate call the last EndUpdate before. | |
| 64 * we remove that blocker. See bug 423269. | |
| 65 */ | |
| 66 class MOZ_STACK_CLASS mozAutoDocConditionalContentUpdateBatch | |
| 67 { | |
| 68 public: | |
| 69 mozAutoDocConditionalContentUpdateBatch(nsIDocument* aDocument, | |
| 70 bool aNotify) : | |
| 71 mDocument(aNotify ? aDocument : nullptr) | |
| 72 { | |
| 73 if (mDocument) { | |
| 74 mDocument->BeginUpdate(UPDATE_CONTENT_MODEL); | |
| 75 } | |
| 76 } | |
| 77 | |
| 78 ~mozAutoDocConditionalContentUpdateBatch() | |
| 79 { | |
| 80 if (mDocument) { | |
| 81 mDocument->EndUpdate(UPDATE_CONTENT_MODEL); | |
| 82 } | |
| 83 } | |
| 84 | |
| 85 private: | |
| 86 nsCOMPtr<nsIDocument> mDocument; | |
| 87 }; | |
| 88 | |
| 89 #endif |
