1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Esben Mose Hansen.
19 : *
20 : * Contributor(s):
21 : * Esben Mose Hansen <esben@oek.dk> (original author)
22 : * L. David Baron <dbaron@dbaron.org>
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : /* base class for nsCounterList and nsQuoteList */
39 :
40 : #ifndef nsGenConList_h___
41 : #define nsGenConList_h___
42 :
43 : #include "nsIFrame.h"
44 : #include "nsStyleStruct.h"
45 : #include "prclist.h"
46 : #include "nsIDOMCharacterData.h"
47 : #include "nsCSSPseudoElements.h"
48 :
49 : class nsGenConList;
50 :
51 : struct nsGenConNode : public PRCList {
52 : // The wrapper frame for all of the pseudo-element's content. This
53 : // frame generally has useful style data and has the
54 : // NS_FRAME_GENERATED_CONTENT bit set (so we use it to track removal),
55 : // but does not necessarily for |nsCounterChangeNode|s.
56 : nsIFrame* mPseudoFrame;
57 :
58 : // Index within the list of things specified by the 'content' property,
59 : // which is needed to do 'content: open-quote open-quote' correctly,
60 : // and needed for similar cases for counters.
61 : const PRInt32 mContentIndex;
62 :
63 : // null for 'content:no-open-quote', 'content:no-close-quote' and for
64 : // counter nodes for increments and resets (rather than uses)
65 : nsCOMPtr<nsIDOMCharacterData> mText;
66 :
67 0 : nsGenConNode(PRInt32 aContentIndex)
68 : : mPseudoFrame(nsnull)
69 0 : , mContentIndex(aContentIndex)
70 : {
71 0 : }
72 :
73 : /**
74 : * Finish initializing the generated content node once we know the
75 : * relevant text frame. This must be called just after
76 : * the textframe has been initialized. This need not be called at all
77 : * for nodes that don't generate text. This will generally set the
78 : * mPseudoFrame, insert the node into aList, and set aTextFrame up
79 : * with the correct text.
80 : * @param aList the list the node belongs to
81 : * @param aPseudoFrame the :before or :after frame
82 : * @param aTextFrame the textframe where the node contents will render
83 : * @return true iff this marked the list dirty
84 : */
85 0 : virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame,
86 : nsIFrame* aTextFrame)
87 : {
88 0 : mPseudoFrame = aPseudoFrame;
89 0 : CheckFrameAssertions();
90 0 : return false;
91 : }
92 :
93 0 : virtual ~nsGenConNode() {} // XXX Avoid, perhaps?
94 :
95 : protected:
96 0 : void CheckFrameAssertions() {
97 0 : NS_ASSERTION(mContentIndex <
98 : PRInt32(mPseudoFrame->GetStyleContent()->ContentCount()),
99 : "index out of range");
100 : // We allow negative values of mContentIndex for 'counter-reset' and
101 : // 'counter-increment'.
102 :
103 0 : NS_ASSERTION(mContentIndex < 0 ||
104 : mPseudoFrame->GetStyleContext()->GetPseudo() ==
105 : nsCSSPseudoElements::before ||
106 : mPseudoFrame->GetStyleContext()->GetPseudo() ==
107 : nsCSSPseudoElements::after,
108 : "not :before/:after generated content and not counter change");
109 0 : NS_ASSERTION(mContentIndex < 0 ||
110 : mPseudoFrame->GetStateBits() & NS_FRAME_GENERATED_CONTENT,
111 : "not generated content and not counter change");
112 0 : }
113 : };
114 :
115 : class nsGenConList {
116 : protected:
117 : nsGenConNode* mFirstNode;
118 : PRUint32 mSize;
119 : public:
120 0 : nsGenConList() : mFirstNode(nsnull), mSize(0) {}
121 0 : ~nsGenConList() { Clear(); }
122 : void Clear();
123 0 : static nsGenConNode* Next(nsGenConNode* aNode) {
124 0 : return static_cast<nsGenConNode*>(PR_NEXT_LINK(aNode));
125 : }
126 0 : static nsGenConNode* Prev(nsGenConNode* aNode) {
127 0 : return static_cast<nsGenConNode*>(PR_PREV_LINK(aNode));
128 : }
129 : void Insert(nsGenConNode* aNode);
130 : // returns whether any nodes have been destroyed
131 : bool DestroyNodesFor(nsIFrame* aFrame); //destroy all nodes with aFrame as parent
132 :
133 : // Return true if |aNode1| is after |aNode2|.
134 : static bool NodeAfter(const nsGenConNode* aNode1,
135 : const nsGenConNode* aNode2);
136 :
137 0 : void Remove(nsGenConNode* aNode) { PR_REMOVE_LINK(aNode); mSize--; }
138 0 : bool IsLast(nsGenConNode* aNode) { return (Next(aNode) == mFirstNode); }
139 : };
140 :
141 : #endif /* nsGenConList_h___ */
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