layout/base/nsGenConList.h@b8a032363ba2 (annotated)
layout/base/nsGenConList.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| 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 | /* base class for nsCounterList and nsQuoteList */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef nsGenConList_h___ |
| michael@0 | 9 | #define nsGenConList_h___ |
| michael@0 | 10 | |
| michael@0 | 11 | #include "nsIFrame.h" |
| michael@0 | 12 | #include "nsStyleStruct.h" |
| michael@0 | 13 | #include "prclist.h" |
| michael@0 | 14 | #include "nsIDOMCharacterData.h" |
| michael@0 | 15 | #include "nsCSSPseudoElements.h" |
| michael@0 | 16 | |
| michael@0 | 17 | class nsGenConList; |
| michael@0 | 18 | |
| michael@0 | 19 | struct nsGenConNode : public PRCList { |
| michael@0 | 20 | // The wrapper frame for all of the pseudo-element's content. This |
| michael@0 | 21 | // frame generally has useful style data and has the |
| michael@0 | 22 | // NS_FRAME_GENERATED_CONTENT bit set (so we use it to track removal), |
| michael@0 | 23 | // but does not necessarily for |nsCounterChangeNode|s. |
| michael@0 | 24 | nsIFrame* mPseudoFrame; |
| michael@0 | 25 | |
| michael@0 | 26 | // Index within the list of things specified by the 'content' property, |
| michael@0 | 27 | // which is needed to do 'content: open-quote open-quote' correctly, |
| michael@0 | 28 | // and needed for similar cases for counters. |
| michael@0 | 29 | const int32_t mContentIndex; |
| michael@0 | 30 | |
| michael@0 | 31 | // null for 'content:no-open-quote', 'content:no-close-quote' and for |
| michael@0 | 32 | // counter nodes for increments and resets (rather than uses) |
| michael@0 | 33 | nsCOMPtr<nsIDOMCharacterData> mText; |
| michael@0 | 34 | |
| michael@0 | 35 | nsGenConNode(int32_t aContentIndex) |
| michael@0 | 36 | : mPseudoFrame(nullptr) |
| michael@0 | 37 | , mContentIndex(aContentIndex) |
| michael@0 | 38 | { |
| michael@0 | 39 | } |
| michael@0 | 40 | |
| michael@0 | 41 | /** |
| michael@0 | 42 | * Finish initializing the generated content node once we know the |
| michael@0 | 43 | * relevant text frame. This must be called just after |
| michael@0 | 44 | * the textframe has been initialized. This need not be called at all |
| michael@0 | 45 | * for nodes that don't generate text. This will generally set the |
| michael@0 | 46 | * mPseudoFrame, insert the node into aList, and set aTextFrame up |
| michael@0 | 47 | * with the correct text. |
| michael@0 | 48 | * @param aList the list the node belongs to |
| michael@0 | 49 | * @param aPseudoFrame the :before or :after frame |
| michael@0 | 50 | * @param aTextFrame the textframe where the node contents will render |
| michael@0 | 51 | * @return true iff this marked the list dirty |
| michael@0 | 52 | */ |
| michael@0 | 53 | virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame, |
| michael@0 | 54 | nsIFrame* aTextFrame) |
| michael@0 | 55 | { |
| michael@0 | 56 | mPseudoFrame = aPseudoFrame; |
| michael@0 | 57 | CheckFrameAssertions(); |
| michael@0 | 58 | return false; |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | virtual ~nsGenConNode() {} // XXX Avoid, perhaps? |
| michael@0 | 62 | |
| michael@0 | 63 | protected: |
| michael@0 | 64 | void CheckFrameAssertions() { |
| michael@0 | 65 | NS_ASSERTION(mContentIndex < |
| michael@0 | 66 | int32_t(mPseudoFrame->StyleContent()->ContentCount()), |
| michael@0 | 67 | "index out of range"); |
| michael@0 | 68 | // We allow negative values of mContentIndex for 'counter-reset' and |
| michael@0 | 69 | // 'counter-increment'. |
| michael@0 | 70 | |
| michael@0 | 71 | NS_ASSERTION(mContentIndex < 0 || |
| michael@0 | 72 | mPseudoFrame->StyleContext()->GetPseudo() == |
| michael@0 | 73 | nsCSSPseudoElements::before || |
| michael@0 | 74 | mPseudoFrame->StyleContext()->GetPseudo() == |
| michael@0 | 75 | nsCSSPseudoElements::after, |
| michael@0 | 76 | "not :before/:after generated content and not counter change"); |
| michael@0 | 77 | NS_ASSERTION(mContentIndex < 0 || |
| michael@0 | 78 | mPseudoFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT, |
| michael@0 | 79 | "not generated content and not counter change"); |
| michael@0 | 80 | } |
| michael@0 | 81 | }; |
| michael@0 | 82 | |
| michael@0 | 83 | class nsGenConList { |
| michael@0 | 84 | protected: |
| michael@0 | 85 | nsGenConNode* mFirstNode; |
| michael@0 | 86 | uint32_t mSize; |
| michael@0 | 87 | public: |
| michael@0 | 88 | nsGenConList() : mFirstNode(nullptr), mSize(0) {} |
| michael@0 | 89 | ~nsGenConList() { Clear(); } |
| michael@0 | 90 | void Clear(); |
| michael@0 | 91 | static nsGenConNode* Next(nsGenConNode* aNode) { |
| michael@0 | 92 | return static_cast<nsGenConNode*>(PR_NEXT_LINK(aNode)); |
| michael@0 | 93 | } |
| michael@0 | 94 | static nsGenConNode* Prev(nsGenConNode* aNode) { |
| michael@0 | 95 | return static_cast<nsGenConNode*>(PR_PREV_LINK(aNode)); |
| michael@0 | 96 | } |
| michael@0 | 97 | void Insert(nsGenConNode* aNode); |
| michael@0 | 98 | // returns whether any nodes have been destroyed |
| michael@0 | 99 | bool DestroyNodesFor(nsIFrame* aFrame); //destroy all nodes with aFrame as parent |
| michael@0 | 100 | |
| michael@0 | 101 | // Return true if |aNode1| is after |aNode2|. |
| michael@0 | 102 | static bool NodeAfter(const nsGenConNode* aNode1, |
| michael@0 | 103 | const nsGenConNode* aNode2); |
| michael@0 | 104 | |
| michael@0 | 105 | void Remove(nsGenConNode* aNode) { PR_REMOVE_LINK(aNode); mSize--; } |
| michael@0 | 106 | bool IsLast(nsGenConNode* aNode) { return (Next(aNode) == mFirstNode); } |
| michael@0 | 107 | }; |
| michael@0 | 108 | |
| michael@0 | 109 | #endif /* nsGenConList_h___ */ |
