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comparison: content/xul/templates/src/nsTemplateMap.h
content/xul/templates/src/nsTemplateMap.h
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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 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 nsTemplateMap_h__ | |
| 7 #define nsTemplateMap_h__ | |
| 8 | |
| 9 #include "pldhash.h" | |
| 10 #include "nsXULElement.h" | |
| 11 | |
| 12 class nsTemplateMap { | |
| 13 protected: | |
| 14 struct Entry { | |
| 15 PLDHashEntryHdr mHdr; | |
| 16 nsIContent* mContent; | |
| 17 nsIContent* mTemplate; | |
| 18 }; | |
| 19 | |
| 20 PLDHashTable mTable; | |
| 21 | |
| 22 void | |
| 23 Init() { PL_DHashTableInit(&mTable, PL_DHashGetStubOps(), nullptr, sizeof(Entry), PL_DHASH_MIN_SIZE); } | |
| 24 | |
| 25 void | |
| 26 Finish() { PL_DHashTableFinish(&mTable); } | |
| 27 | |
| 28 public: | |
| 29 nsTemplateMap() { Init(); } | |
| 30 | |
| 31 ~nsTemplateMap() { Finish(); } | |
| 32 | |
| 33 void | |
| 34 Put(nsIContent* aContent, nsIContent* aTemplate) { | |
| 35 NS_ASSERTION(PL_DHASH_ENTRY_IS_FREE(PL_DHashTableOperate(&mTable, aContent, PL_DHASH_LOOKUP)), | |
| 36 "aContent already in map"); | |
| 37 | |
| 38 Entry* entry = | |
| 39 reinterpret_cast<Entry*>(PL_DHashTableOperate(&mTable, aContent, PL_DHASH_ADD)); | |
| 40 | |
| 41 if (entry) { | |
| 42 entry->mContent = aContent; | |
| 43 entry->mTemplate = aTemplate; | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 void | |
| 48 Remove(nsIContent* aContent) { | |
| 49 PL_DHashTableOperate(&mTable, aContent, PL_DHASH_REMOVE); | |
| 50 | |
| 51 for (nsIContent* child = aContent->GetFirstChild(); | |
| 52 child; | |
| 53 child = child->GetNextSibling()) { | |
| 54 Remove(child); | |
| 55 } | |
| 56 } | |
| 57 | |
| 58 | |
| 59 void | |
| 60 GetTemplateFor(nsIContent* aContent, nsIContent** aResult) { | |
| 61 Entry* entry = | |
| 62 reinterpret_cast<Entry*>(PL_DHashTableOperate(&mTable, aContent, PL_DHASH_LOOKUP)); | |
| 63 | |
| 64 if (PL_DHASH_ENTRY_IS_BUSY(&entry->mHdr)) | |
| 65 NS_IF_ADDREF(*aResult = entry->mTemplate); | |
| 66 else | |
| 67 *aResult = nullptr; | |
| 68 } | |
| 69 | |
| 70 void | |
| 71 Clear() { Finish(); Init(); } | |
| 72 }; | |
| 73 | |
| 74 #endif // nsTemplateMap_h__ | |
| 75 |
