layout/forms/nsMeterFrame.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsMeterFrame_h___
   7 #define nsMeterFrame_h___
   8
   9 #include "nsContainerFrame.h"
  10 #include "nsIAnonymousContentCreator.h"
  11 #include "nsCOMPtr.h"
  12
  13 class nsMeterFrame : public nsContainerFrame,
  14                      public nsIAnonymousContentCreator
  15
  16 {
  17 public:
  18   NS_DECL_QUERYFRAME_TARGET(nsMeterFrame)
  19   NS_DECL_QUERYFRAME
  20   NS_DECL_FRAMEARENA_HELPERS
  21
  22   nsMeterFrame(nsStyleContext* aContext);
  23   virtual ~nsMeterFrame();
  24
  25   virtual void DestroyFrom(nsIFrame* aDestructRoot);
  26
  27   NS_IMETHOD Reflow(nsPresContext*           aCX,
  28                     nsHTMLReflowMetrics&     aDesiredSize,
  29                     const nsHTMLReflowState& aReflowState,
  30                     nsReflowStatus&          aStatus);
  31
  32 #ifdef DEBUG
  33   NS_IMETHOD GetFrameName(nsAString& aResult) const {
  34     return MakeFrameName(NS_LITERAL_STRING("Meter"), aResult);
  35   }
  36 #endif
  37
  38   virtual bool IsLeaf() const { return true; }
  39
  40   // nsIAnonymousContentCreator
  41   virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements);
  42   virtual void AppendAnonymousContentTo(nsBaseContentList& aElements,
  43                                         PRUint32 aFilter);
  44
  45   NS_IMETHOD AttributeChanged(PRInt32  aNameSpaceID,
  46                               nsIAtom* aAttribute,
  47                               PRInt32  aModType);
  48
  49   virtual nsSize ComputeAutoSize(nsRenderingContext *aRenderingContext,
  50                                  nsSize aCBSize, nscoord aAvailableWidth,
  51                                  nsSize aMargin, nsSize aBorder,
  52                                  nsSize aPadding, bool aShrinkWrap);
  53
  54   virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
  55   virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
  56
  57   virtual bool IsFrameOfType(PRUint32 aFlags) const
  58   {
  59     return nsContainerFrame::IsFrameOfType(aFlags &
  60       ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));
  61   }
  62
  63   /**
  64    * Returns whether the frame and its child should use the native style.
  65    */
  66   bool ShouldUseNativeStyle() const;
  67
  68 protected:
  69   // Helper function which reflow the anonymous div frame.
  70   void ReflowBarFrame(nsIFrame*                aBarFrame,
  71                       nsPresContext*           aPresContext,
  72                       const nsHTMLReflowState& aReflowState,
  73                       nsReflowStatus&          aStatus);
  74   /**
  75    * The div used to show the meter bar.
  76    * @see nsMeterFrame::CreateAnonymousContent
  77    */
  78   nsCOMPtr<nsIContent> mBarDiv;
  79 };
  80
  81 #endif