layout/base/nsQuoteList.h

   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 StyleContentType mType;
  18
  19   // Quote depth before this quote, which is always non-negative.
  20   int32_t mDepthBefore;
  21
  22   nsQuoteNode(StyleContentType aType, uint32_t aContentIndex)
  23       : nsGenConNode(aContentIndex), mType(aType), mDepthBefore(0) {
  24     NS_ASSERTION(aType == StyleContentType::OpenQuote ||
  25                      aType == StyleContentType::CloseQuote ||
  26                      aType == StyleContentType::NoOpenQuote ||
  27                      aType == StyleContentType::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'?
  36   bool IsOpenQuote() {
  37     return mType == StyleContentType::OpenQuote ||
  38            mType == StyleContentType::NoOpenQuote;
  39   }
  40
  41   // is this 'close-quote' or 'no-close-quote'?
  42   bool IsCloseQuote() { return !IsOpenQuote(); }
  43
  44   // is this 'open-quote' or 'close-quote'?
  45   bool IsRealQuote() {
  46     return mType == StyleContentType::OpenQuote ||
  47            mType == StyleContentType::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).
  53   int32_t Depth() { return IsOpenQuote() ? mDepthBefore : mDepthBefore - 1; }
  54
  55   // always non-negative
  56   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   nsString Text();
  63 };
  64
  65 class nsQuoteList : public nsGenConList {
  66  private:
  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
  76   nsQuoteNode* Next(nsQuoteNode* aNode) {
  77     return static_cast<nsQuoteNode*>(nsGenConList::Next(aNode));
  78   }
  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___ */