layout/xul/nsStackFrame.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 /**
   8
   9   Eric D Vaughan
  10   A frame that can have multiple children. Only one child may be displayed at
  11 one time. So the can be flipped though like a Stack of cards.
  12
  13 **/
  14
  15 #ifndef nsStackFrame_h___
  16 #define nsStackFrame_h___
  17
  18 #include "mozilla/Attributes.h"
  19 #include "nsBoxFrame.h"
  20
  21 namespace mozilla {
  22 class PresShell;
  23 }  // namespace mozilla
  24
  25 class nsStackFrame final : public nsBoxFrame {
  26  public:
  27   NS_DECL_FRAMEARENA_HELPERS(nsStackFrame)
  28
  29   friend nsIFrame* NS_NewStackFrame(mozilla::PresShell* aPresShell,
  30                                     ComputedStyle* aStyle);
  31
  32 #ifdef DEBUG_FRAME_DUMP
  33   virtual nsresult GetFrameName(nsAString& aResult) const override {
  34     return MakeFrameName(u"Stack"_ns, aResult);
  35   }
  36 #endif
  37
  38   virtual void BuildDisplayListForChildren(
  39       nsDisplayListBuilder* aBuilder, const nsDisplayListSet& aLists) override;
  40
  41  protected:
  42   explicit nsStackFrame(ComputedStyle* aStyle, nsPresContext* aPresContext);
  43 };  // class nsStackFrame
  44
  45 #endif