content/base/src/mozAutoDocUpdate.h@6474c204b198 (annotated)
content/base/src/mozAutoDocUpdate.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | #ifndef mozAutoDocUpdate_h_ |
| michael@0 | 6 | #define mozAutoDocUpdate_h_ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "nsContentUtils.h" // For AddScriptBlocker() and RemoveScriptBlocker(). |
| michael@0 | 9 | #include "nsIDocument.h" |
| michael@0 | 10 | #include "nsIDocumentObserver.h" |
| michael@0 | 11 | |
| michael@0 | 12 | /** |
| michael@0 | 13 | * Helper class to automatically handle batching of document updates. This |
| michael@0 | 14 | * class will call BeginUpdate on construction and EndUpdate on destruction on |
| michael@0 | 15 | * the given document with the given update type. The document could be null, |
| michael@0 | 16 | * in which case no updates will be called. The constructor also takes a |
| michael@0 | 17 | * boolean that can be set to false to prevent notifications. |
| michael@0 | 18 | */ |
| michael@0 | 19 | class MOZ_STACK_CLASS mozAutoDocUpdate |
| michael@0 | 20 | { |
| michael@0 | 21 | public: |
| michael@0 | 22 | mozAutoDocUpdate(nsIDocument* aDocument, nsUpdateType aUpdateType, |
| michael@0 | 23 | bool aNotify) : |
| michael@0 | 24 | mDocument(aNotify ? aDocument : nullptr), |
| michael@0 | 25 | mUpdateType(aUpdateType) |
| michael@0 | 26 | { |
| michael@0 | 27 | if (mDocument) { |
| michael@0 | 28 | mDocument->BeginUpdate(mUpdateType); |
| michael@0 | 29 | } |
| michael@0 | 30 | else { |
| michael@0 | 31 | nsContentUtils::AddScriptBlocker(); |
| michael@0 | 32 | } |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | ~mozAutoDocUpdate() |
| michael@0 | 36 | { |
| michael@0 | 37 | if (mDocument) { |
| michael@0 | 38 | mDocument->EndUpdate(mUpdateType); |
| michael@0 | 39 | } |
| michael@0 | 40 | else { |
| michael@0 | 41 | nsContentUtils::RemoveScriptBlocker(); |
| michael@0 | 42 | } |
| michael@0 | 43 | } |
| michael@0 | 44 | |
| michael@0 | 45 | private: |
| michael@0 | 46 | nsCOMPtr<nsIDocument> mDocument; |
| michael@0 | 47 | nsUpdateType mUpdateType; |
| michael@0 | 48 | }; |
| michael@0 | 49 | |
| michael@0 | 50 | #define MOZ_AUTO_DOC_UPDATE_PASTE2(tok,line) tok##line |
| michael@0 | 51 | #define MOZ_AUTO_DOC_UPDATE_PASTE(tok,line) \ |
| michael@0 | 52 | MOZ_AUTO_DOC_UPDATE_PASTE2(tok,line) |
| michael@0 | 53 | #define MOZ_AUTO_DOC_UPDATE(doc,type,notify) \ |
| michael@0 | 54 | mozAutoDocUpdate MOZ_AUTO_DOC_UPDATE_PASTE(_autoDocUpdater_, __LINE__) \ |
| michael@0 | 55 | (doc,type,notify) |
| michael@0 | 56 | |
| michael@0 | 57 | |
| michael@0 | 58 | /** |
| michael@0 | 59 | * Creates an update batch only under certain conditions. |
| michael@0 | 60 | * Use this rather than mozAutoDocUpdate when you expect inner updates |
| michael@0 | 61 | * to notify but you don't always want to spec cycles creating a batch. |
| michael@0 | 62 | * This is needed to avoid having this batch always create a blocker, |
| michael@0 | 63 | * but then have inner mozAutoDocUpdate call the last EndUpdate before. |
| michael@0 | 64 | * we remove that blocker. See bug 423269. |
| michael@0 | 65 | */ |
| michael@0 | 66 | class MOZ_STACK_CLASS mozAutoDocConditionalContentUpdateBatch |
| michael@0 | 67 | { |
| michael@0 | 68 | public: |
| michael@0 | 69 | mozAutoDocConditionalContentUpdateBatch(nsIDocument* aDocument, |
| michael@0 | 70 | bool aNotify) : |
| michael@0 | 71 | mDocument(aNotify ? aDocument : nullptr) |
| michael@0 | 72 | { |
| michael@0 | 73 | if (mDocument) { |
| michael@0 | 74 | mDocument->BeginUpdate(UPDATE_CONTENT_MODEL); |
| michael@0 | 75 | } |
| michael@0 | 76 | } |
| michael@0 | 77 | |
| michael@0 | 78 | ~mozAutoDocConditionalContentUpdateBatch() |
| michael@0 | 79 | { |
| michael@0 | 80 | if (mDocument) { |
| michael@0 | 81 | mDocument->EndUpdate(UPDATE_CONTENT_MODEL); |
| michael@0 | 82 | } |
| michael@0 | 83 | } |
| michael@0 | 84 | |
| michael@0 | 85 | private: |
| michael@0 | 86 | nsCOMPtr<nsIDocument> mDocument; |
| michael@0 | 87 | }; |
| michael@0 | 88 | |
| michael@0 | 89 | #endif |
