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 namespace mozilla {
  16
  17 class ContainStyleScope;
  18
  19 }  // namespace mozilla
  20
  21 struct nsQuoteNode : public nsGenConNode {
  22   // open-quote, close-quote, no-open-quote, or no-close-quote
  23   const StyleContentType mType;
  24
  25   // Quote depth before this quote, which is always non-negative.
  26   int32_t mDepthBefore;
  27
  28   nsQuoteNode(StyleContentType aType, uint32_t aContentIndex)
  29       : nsGenConNode(aContentIndex), mType(aType), mDepthBefore(0) {
  30     NS_ASSERTION(aType == StyleContentType::OpenQuote ||
  31                      aType == StyleContentType::CloseQuote ||
  32                      aType == StyleContentType::NoOpenQuote ||
  33                      aType == StyleContentType::NoCloseQuote,
  34                  "incorrect type");
  35     NS_ASSERTION(aContentIndex <= INT32_MAX, "out of range");
  36   }
  37
  38   virtual bool InitTextFrame(nsGenConList* aList, nsIFrame* aPseudoFrame,
  39                              nsIFrame* aTextFrame) override;
  40
  41   // is this 'open-quote' or 'no-open-quote'?
  42   bool IsOpenQuote() {
  43     return mType == StyleContentType::OpenQuote ||
  44            mType == StyleContentType::NoOpenQuote;
  45   }
  46
  47   // is this 'close-quote' or 'no-close-quote'?
  48   bool IsCloseQuote() { return !IsOpenQuote(); }
  49
  50   // is this 'open-quote' or 'close-quote'?
  51   bool IsRealQuote() {
  52     return mType == StyleContentType::OpenQuote ||
  53            mType == StyleContentType::CloseQuote;
  54   }
  55
  56   // Depth of the quote for *this* node.  Either non-negative or -1.
  57   // -1 means this is a closing quote that tried to decrement the
  58   // counter below zero (which means no quote should be rendered).
  59   int32_t Depth() { return IsOpenQuote() ? mDepthBefore : mDepthBefore - 1; }
  60
  61   // always non-negative
  62   int32_t DepthAfter() {
  63     return IsOpenQuote() ? mDepthBefore + 1
  64                          : (mDepthBefore == 0 ? 0 : mDepthBefore - 1);
  65   }
  66
  67   // The text that should be displayed for this quote.
  68   nsString Text();
  69 };
  70
  71 class nsQuoteList : public nsGenConList {
  72  private:
  73   nsQuoteNode* FirstNode() {
  74     return static_cast<nsQuoteNode*>(mList.getFirst());
  75   }
  76
  77  public:
  78   explicit nsQuoteList(mozilla::ContainStyleScope* aScope) : mScope(aScope) {}
  79
  80   // assign the correct |mDepthBefore| value to a node that has been inserted
  81   // Should be called immediately after calling |Insert|.
  82   void Calc(nsQuoteNode* aNode);
  83
  84   nsQuoteNode* Next(nsQuoteNode* aNode) {
  85     return static_cast<nsQuoteNode*>(nsGenConList::Next(aNode));
  86   }
  87   nsQuoteNode* Prev(nsQuoteNode* aNode) {
  88     return static_cast<nsQuoteNode*>(nsGenConList::Prev(aNode));
  89   }
  90
  91   void RecalcAll();
  92 #ifdef DEBUG
  93   void PrintChain();
  94 #endif
  95
  96  private:
  97   mozilla::ContainStyleScope* mScope;
  98 };
  99
 100 #endif /* nsQuoteList_h___ */