1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4  * License, v. 2.0. If a copy of the MPL was not distributed with this
5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7 /* implementation of quotes for the CSS 'content' property */
8 
9 #ifndef nsQuoteList_h___
10 #define nsQuoteList_h___
11 
12 #include "mozilla/Attributes.h"
13 #include "nsGenConList.h"
14 
15 struct nsQuoteNode : public nsGenConNode {
16   // open-quote, close-quote, no-open-quote, or no-close-quote
17   const nsStyleContentType mType;
18 
19   // Quote depth before this quote, which is always non-negative.
20   int32_t mDepthBefore;
21 
nsQuoteNodensQuoteNode22   nsQuoteNode(nsStyleContentType& aType, uint32_t aContentIndex)
23       : nsGenConNode(aContentIndex), mType(aType), mDepthBefore(0) {
24     NS_ASSERTION(aType == eStyleContentType_OpenQuote ||
25                      aType == eStyleContentType_CloseQuote ||
26                      aType == eStyleContentType_NoOpenQuote ||
27                      aType == eStyleContentType_NoCloseQuote,
28                  "incorrect type");
29     NS_ASSERTION(aContentIndex <= INT32_MAX, "out of range");
30   }
31 
32   virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame,
33                              nsIFrame* aTextFrame) override;
34 
35   // is this 'open-quote' or 'no-open-quote'?
IsOpenQuotensQuoteNode36   bool IsOpenQuote() {
37     return mType == eStyleContentType_OpenQuote ||
38            mType == eStyleContentType_NoOpenQuote;
39   }
40 
41   // is this 'close-quote' or 'no-close-quote'?
IsCloseQuotensQuoteNode42   bool IsCloseQuote() { return !IsOpenQuote(); }
43 
44   // is this 'open-quote' or 'close-quote'?
IsRealQuotensQuoteNode45   bool IsRealQuote() {
46     return mType == eStyleContentType_OpenQuote ||
47            mType == eStyleContentType_CloseQuote;
48   }
49 
50   // Depth of the quote for *this* node.  Either non-negative or -1.
51   // -1 means this is a closing quote that tried to decrement the
52   // counter below zero (which means no quote should be rendered).
DepthnsQuoteNode53   int32_t Depth() { return IsOpenQuote() ? mDepthBefore : mDepthBefore - 1; }
54 
55   // always non-negative
DepthAfternsQuoteNode56   int32_t DepthAfter() {
57     return IsOpenQuote() ? mDepthBefore + 1
58                          : (mDepthBefore == 0 ? 0 : mDepthBefore - 1);
59   }
60 
61   // The text that should be displayed for this quote.
62   const nsString* Text();
63 };
64 
65 class nsQuoteList : public nsGenConList {
66  private:
FirstNode()67   nsQuoteNode* FirstNode() {
68     return static_cast<nsQuoteNode*>(mList.getFirst());
69   }
70 
71  public:
72   // assign the correct |mDepthBefore| value to a node that has been inserted
73   // Should be called immediately after calling |Insert|.
74   void Calc(nsQuoteNode* aNode);
75 
Next(nsQuoteNode * aNode)76   nsQuoteNode* Next(nsQuoteNode* aNode) {
77     return static_cast<nsQuoteNode*>(nsGenConList::Next(aNode));
78   }
Prev(nsQuoteNode * aNode)79   nsQuoteNode* Prev(nsQuoteNode* aNode) {
80     return static_cast<nsQuoteNode*>(nsGenConList::Prev(aNode));
81   }
82 
83   void RecalcAll();
84 #ifdef DEBUG
85   void PrintChain();
86 #endif
87 };
88 
89 #endif /* nsQuoteList_h___ */
90