content/base/src/nsStubDocumentObserver.h@6474c204b198 (annotated)
content/base/src/nsStubDocumentObserver.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 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /* |
| michael@0 | 7 | * nsStubDocumentObserver is an implementation of the nsIDocumentObserver |
| michael@0 | 8 | * interface (except for the methods on nsISupports) that is intended to be |
| michael@0 | 9 | * used as a base class within the content/layout library. All methods do |
| michael@0 | 10 | * nothing. |
| michael@0 | 11 | */ |
| michael@0 | 12 | |
| michael@0 | 13 | #ifndef nsStubDocumentObserver_h_ |
| michael@0 | 14 | #define nsStubDocumentObserver_h_ |
| michael@0 | 15 | |
| michael@0 | 16 | #include "nsIDocumentObserver.h" |
| michael@0 | 17 | |
| michael@0 | 18 | /** |
| michael@0 | 19 | * There are two advantages to inheriting from nsStubDocumentObserver |
| michael@0 | 20 | * rather than directly from nsIDocumentObserver: |
| michael@0 | 21 | * 1. smaller compiled code size (since there's no need for the code |
| michael@0 | 22 | * for the empty virtual function implementations for every |
| michael@0 | 23 | * nsIDocumentObserver implementation) |
| michael@0 | 24 | * 2. the performance of document's loop over observers benefits from |
| michael@0 | 25 | * the fact that more of the functions called are the same (which |
| michael@0 | 26 | * can reduce instruction cache misses and perhaps improve branch |
| michael@0 | 27 | * prediction) |
| michael@0 | 28 | */ |
| michael@0 | 29 | class nsStubDocumentObserver : public nsIDocumentObserver { |
| michael@0 | 30 | public: |
| michael@0 | 31 | NS_DECL_NSIDOCUMENTOBSERVER |
| michael@0 | 32 | }; |
| michael@0 | 33 | |
| michael@0 | 34 | #endif /* !defined(nsStubDocumentObserver_h_) */ |
