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comparison: layout/base/nsGenConList.h
layout/base/nsGenConList.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:cfeaa3d25cc3 |
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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 /* base class for nsCounterList and nsQuoteList */ | |
| 7 | |
| 8 #ifndef nsGenConList_h___ | |
| 9 #define nsGenConList_h___ | |
| 10 | |
| 11 #include "nsIFrame.h" | |
| 12 #include "nsStyleStruct.h" | |
| 13 #include "prclist.h" | |
| 14 #include "nsIDOMCharacterData.h" | |
| 15 #include "nsCSSPseudoElements.h" | |
| 16 | |
| 17 class nsGenConList; | |
| 18 | |
| 19 struct nsGenConNode : public PRCList { | |
| 20 // The wrapper frame for all of the pseudo-element's content. This | |
| 21 // frame generally has useful style data and has the | |
| 22 // NS_FRAME_GENERATED_CONTENT bit set (so we use it to track removal), | |
| 23 // but does not necessarily for |nsCounterChangeNode|s. | |
| 24 nsIFrame* mPseudoFrame; | |
| 25 | |
| 26 // Index within the list of things specified by the 'content' property, | |
| 27 // which is needed to do 'content: open-quote open-quote' correctly, | |
| 28 // and needed for similar cases for counters. | |
| 29 const int32_t mContentIndex; | |
| 30 | |
| 31 // null for 'content:no-open-quote', 'content:no-close-quote' and for | |
| 32 // counter nodes for increments and resets (rather than uses) | |
| 33 nsCOMPtr<nsIDOMCharacterData> mText; | |
| 34 | |
| 35 nsGenConNode(int32_t aContentIndex) | |
| 36 : mPseudoFrame(nullptr) | |
| 37 , mContentIndex(aContentIndex) | |
| 38 { | |
| 39 } | |
| 40 | |
| 41 /** | |
| 42 * Finish initializing the generated content node once we know the | |
| 43 * relevant text frame. This must be called just after | |
| 44 * the textframe has been initialized. This need not be called at all | |
| 45 * for nodes that don't generate text. This will generally set the | |
| 46 * mPseudoFrame, insert the node into aList, and set aTextFrame up | |
| 47 * with the correct text. | |
| 48 * @param aList the list the node belongs to | |
| 49 * @param aPseudoFrame the :before or :after frame | |
| 50 * @param aTextFrame the textframe where the node contents will render | |
| 51 * @return true iff this marked the list dirty | |
| 52 */ | |
| 53 virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame, | |
| 54 nsIFrame* aTextFrame) | |
| 55 { | |
| 56 mPseudoFrame = aPseudoFrame; | |
| 57 CheckFrameAssertions(); | |
| 58 return false; | |
| 59 } | |
| 60 | |
| 61 virtual ~nsGenConNode() {} // XXX Avoid, perhaps? | |
| 62 | |
| 63 protected: | |
| 64 void CheckFrameAssertions() { | |
| 65 NS_ASSERTION(mContentIndex < | |
| 66 int32_t(mPseudoFrame->StyleContent()->ContentCount()), | |
| 67 "index out of range"); | |
| 68 // We allow negative values of mContentIndex for 'counter-reset' and | |
| 69 // 'counter-increment'. | |
| 70 | |
| 71 NS_ASSERTION(mContentIndex < 0 || | |
| 72 mPseudoFrame->StyleContext()->GetPseudo() == | |
| 73 nsCSSPseudoElements::before || | |
| 74 mPseudoFrame->StyleContext()->GetPseudo() == | |
| 75 nsCSSPseudoElements::after, | |
| 76 "not :before/:after generated content and not counter change"); | |
| 77 NS_ASSERTION(mContentIndex < 0 || | |
| 78 mPseudoFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT, | |
| 79 "not generated content and not counter change"); | |
| 80 } | |
| 81 }; | |
| 82 | |
| 83 class nsGenConList { | |
| 84 protected: | |
| 85 nsGenConNode* mFirstNode; | |
| 86 uint32_t mSize; | |
| 87 public: | |
| 88 nsGenConList() : mFirstNode(nullptr), mSize(0) {} | |
| 89 ~nsGenConList() { Clear(); } | |
| 90 void Clear(); | |
| 91 static nsGenConNode* Next(nsGenConNode* aNode) { | |
| 92 return static_cast<nsGenConNode*>(PR_NEXT_LINK(aNode)); | |
| 93 } | |
| 94 static nsGenConNode* Prev(nsGenConNode* aNode) { | |
| 95 return static_cast<nsGenConNode*>(PR_PREV_LINK(aNode)); | |
| 96 } | |
| 97 void Insert(nsGenConNode* aNode); | |
| 98 // returns whether any nodes have been destroyed | |
| 99 bool DestroyNodesFor(nsIFrame* aFrame); //destroy all nodes with aFrame as parent | |
| 100 | |
| 101 // Return true if |aNode1| is after |aNode2|. | |
| 102 static bool NodeAfter(const nsGenConNode* aNode1, | |
| 103 const nsGenConNode* aNode2); | |
| 104 | |
| 105 void Remove(nsGenConNode* aNode) { PR_REMOVE_LINK(aNode); mSize--; } | |
| 106 bool IsLast(nsGenConNode* aNode) { return (Next(aNode) == mFirstNode); } | |
| 107 }; | |
| 108 | |
| 109 #endif /* nsGenConList_h___ */ |
