parser/html/nsHtml5OwningUTF16Buffer.h

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #ifndef nsHtml5OwningUTF16Buffer_h
   6 #define nsHtml5OwningUTF16Buffer_h
   7
   8 #include "nsHtml5UTF16Buffer.h"
   9 #include "mozilla/Span.h"
  10
  11 class nsHtml5OwningUTF16Buffer : public nsHtml5UTF16Buffer {
  12  public:
  13   NS_INLINE_DECL_THREADSAFE_REFCOUNTING(nsHtml5OwningUTF16Buffer)
  14
  15  private:
  16   /**
  17    * Passes a buffer and its length to the superclass constructor.
  18    */
  19   explicit nsHtml5OwningUTF16Buffer(char16_t* aBuffer);
  20
  21  public:
  22   /**
  23    * Constructor for a parser key placeholder. (No actual buffer.)
  24    * @param aKey a parser key
  25    */
  26   explicit nsHtml5OwningUTF16Buffer(void* aKey);
  27
  28  protected:
  29   /**
  30    * Takes care of releasing the owned buffer.
  31    */
  32   ~nsHtml5OwningUTF16Buffer();
  33
  34  public:
  35   /**
  36    * The next buffer in a queue.
  37    */
  38   RefPtr<nsHtml5OwningUTF16Buffer> next;
  39
  40   /**
  41    * A parser key.
  42    */
  43   void* key;
  44
  45   static already_AddRefed<nsHtml5OwningUTF16Buffer> FalliblyCreate(
  46       int32_t aLength);
  47
  48   /**
  49    * Swap start, end and buffer fields with another object.
  50    */
  51   void Swap(nsHtml5OwningUTF16Buffer* aOther);
  52
  53   /**
  54    * Return a span from `end` to `aBufferSize`.
  55    */
  56   mozilla::Span<char16_t> TailAsSpan(int32_t aBufferSize);
  57
  58   /**
  59    * Add the argument to `end`.
  60    */
  61   void AdvanceEnd(int32_t aNumberOfCodeUnits);
  62 };
  63
  64 #endif  // nsHtml5OwningUTF16Buffer_h