gecko/layout/svg/base/src/nsSVGContainerFrame.h

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is IBM Corporation.
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 * Contributor(s):
 *
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#ifndef NS_SVGCONTAINERFRAME_H
#define NS_SVGCONTAINERFRAME_H

#include "gfxMatrix.h"
#include "gfxRect.h"
#include "nsContainerFrame.h"
#include "nsFrame.h"
#include "nsIFrame.h"
#include "nsISVGChildFrame.h"
#include "nsQueryFrame.h"
#include "nsRect.h"

class nsFrameList;
class nsIContent;
class nsIPresShell;
class nsRenderingContext;
class nsStyleContext;

struct nsPoint;

typedef nsContainerFrame nsSVGContainerFrameBase;

/**
 * Base class for SVG container frames. Frame sub-classes that do not
 * display their contents directly (such as the frames for <marker> or
 * <pattern>) just inherit this class. Frame sub-classes that do or can
 * display their contents directly (such as the frames for inner-<svg> or
 * <g>) inherit our nsDisplayContainerFrame sub-class.
 */
class nsSVGContainerFrame : public nsSVGContainerFrameBase
{
  friend nsIFrame* NS_NewSVGContainerFrame(nsIPresShell* aPresShell,
                                           nsStyleContext* aContext);
protected:
  nsSVGContainerFrame(nsStyleContext* aContext) :
    nsSVGContainerFrameBase(aContext) {}

public:
  NS_DECL_QUERYFRAME_TARGET(nsSVGContainerFrame)
  NS_DECL_QUERYFRAME
  NS_DECL_FRAMEARENA_HELPERS

  // Returns the transform to our gfxContext (to device pixels, not CSS px)
  virtual gfxMatrix GetCanvasTM() { return gfxMatrix(); }

  // nsIFrame:
  NS_IMETHOD AppendFrames(ChildListID     aListID,
                          nsFrameList&    aFrameList);
  NS_IMETHOD InsertFrames(ChildListID     aListID,
                          nsIFrame*       aPrevFrame,
                          nsFrameList&    aFrameList);
  NS_IMETHOD RemoveFrame(ChildListID     aListID,
                         nsIFrame*       aOldFrame);

  virtual bool IsFrameOfType(PRUint32 aFlags) const
  {
    return nsSVGContainerFrameBase::IsFrameOfType(
            aFlags & ~(nsIFrame::eSVG | nsIFrame::eSVGContainer));
  }
};

/**
 * Frame class or base-class for SVG containers that can or do display their
 * contents directly.
 */
class nsSVGDisplayContainerFrame : public nsSVGContainerFrame,
                                   public nsISVGChildFrame
{
protected:
  nsSVGDisplayContainerFrame(nsStyleContext* aContext) :
    nsSVGContainerFrame(aContext) {}

public:
  NS_DECL_QUERYFRAME_TARGET(nsSVGDisplayContainerFrame)
  NS_DECL_QUERYFRAME
  NS_DECL_FRAMEARENA_HELPERS

  // nsIFrame:
  NS_IMETHOD InsertFrames(ChildListID     aListID,
                          nsIFrame*       aPrevFrame,
                          nsFrameList&    aFrameList);
  NS_IMETHOD RemoveFrame(ChildListID     aListID,
                         nsIFrame*       aOldFrame);
  NS_IMETHOD Init(nsIContent*      aContent,
                  nsIFrame*        aParent,
                  nsIFrame*        aPrevInFlow);

  // nsISVGChildFrame interface:
  NS_IMETHOD PaintSVG(nsRenderingContext* aContext,
                      const nsIntRect *aDirtyRect);
  NS_IMETHOD_(nsIFrame*) GetFrameForPoint(const nsPoint &aPoint);
  NS_IMETHOD_(nsRect) GetCoveredRegion();
  virtual void UpdateBounds();
  virtual void NotifySVGChanged(PRUint32 aFlags);
  virtual SVGBBox GetBBoxContribution(const gfxMatrix &aToBBoxUserspace,
                                      PRUint32 aFlags);
  NS_IMETHOD_(bool) IsDisplayContainer() { return true; }
  NS_IMETHOD_(bool) HasValidCoveredRect() { return false; }
};

#endif