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

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * 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
 * Crocodile Clips Ltd..
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Alex Fritze <alex.fritze@crocodile-clips.com> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * decision by deleting the provisions above and replace them with the notice
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 * ***** END LICENSE BLOCK ***** */

#ifndef NSSVGFOREIGNOBJECTFRAME_H__
#define NSSVGFOREIGNOBJECTFRAME_H__

#include "nsContainerFrame.h"
#include "nsISVGChildFrame.h"
#include "nsIDOMSVGMatrix.h"
#include "nsRegion.h"
#include "nsIPresShell.h"

typedef nsContainerFrame nsSVGForeignObjectFrameBase;

class nsSVGForeignObjectFrame : public nsSVGForeignObjectFrameBase,
                                public nsISVGChildFrame
{
  friend nsIFrame*
  NS_NewSVGForeignObjectFrame(nsIPresShell* aPresShell, nsIContent* aContent, nsStyleContext* aContext);
protected:
  nsSVGForeignObjectFrame(nsStyleContext* aContext);
  
  // nsISupports interface:
  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
private:
  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
  NS_IMETHOD_(nsrefcnt) Release() { return 1; }

public:
  // nsIFrame:  
  NS_IMETHOD  Init(nsIContent* aContent,
                   nsIFrame*   aParent,
                   nsIFrame*   aPrevInFlow);
  virtual void Destroy();
  NS_IMETHOD  AttributeChanged(PRInt32         aNameSpaceID,
                               nsIAtom*        aAttribute,
                               PRInt32         aModType);

  virtual nsIFrame* GetContentInsertionFrame() {
    return GetFirstChild(nsnull)->GetContentInsertionFrame();
  }

  NS_IMETHOD Reflow(nsPresContext*           aPresContext,
                    nsHTMLReflowMetrics&     aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus&          aStatus);

  /**
   * Foreign objects are always transformed.
   */
  virtual PRBool IsTransformed() const
  {
    return PR_TRUE;
  }

  /**
   * Foreign objects can return a transform matrix.
   */
  virtual gfxMatrix GetTransformMatrix(nsIFrame **aOutAncestor);

  /**
   * Get the "type" of the frame
   *
   * @see nsGkAtoms::svgForeignObjectFrame
   */
  virtual nsIAtom* GetType() const;

  virtual PRBool IsFrameOfType(PRUint32 aFlags) const
  {
    return nsSVGForeignObjectFrameBase::IsFrameOfType(aFlags &
      ~(nsIFrame::eSVG | nsIFrame::eSVGForeignObject));
  }

  virtual void InvalidateInternal(const nsRect& aDamageRect,
                                  nscoord aX, nscoord aY, nsIFrame* aForChild,
                                  PRBool aImmediate);

#ifdef DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const
  {
    return MakeFrameName(NS_LITERAL_STRING("SVGForeignObject"), aResult);
  }
#endif

  // nsISVGChildFrame interface:
  NS_IMETHOD PaintSVG(nsSVGRenderState *aContext, nsIntRect *aDirtyRect);
  NS_IMETHOD_(nsIFrame*) GetFrameForPoint(const nsPoint &aPoint);
  NS_IMETHOD_(nsRect) GetCoveredRegion();
  NS_IMETHOD UpdateCoveredRegion();
  NS_IMETHOD InitialUpdate();
  virtual void NotifySVGChanged(PRUint32 aFlags);
  NS_IMETHOD NotifyRedrawSuspended();
  NS_IMETHOD NotifyRedrawUnsuspended();
  NS_IMETHOD SetMatrixPropagation(PRBool aPropagate);
  virtual PRBool GetMatrixPropagation();
  NS_IMETHOD SetOverrideCTM(nsIDOMSVGMatrix *aCTM);
  virtual already_AddRefed<nsIDOMSVGMatrix> GetOverrideCTM();
  NS_IMETHOD GetBBox(nsIDOMSVGRect **_retval);
  NS_IMETHOD_(PRBool) IsDisplayContainer() { return PR_TRUE; }
  NS_IMETHOD_(PRBool) HasValidCoveredRect() { return PR_FALSE; }

  // foreignobject public methods
  /**
   * @param aPt a point in the app unit coordinate system of the SVG outer frame
   * Transforms the point to a point in this frame's app unit coordinate system
   */
  nsPoint TransformPointFromOuter(nsPoint aPt);

  already_AddRefed<nsIDOMSVGMatrix> GetCanvasTM();

  // This method allows our nsSVGOuterSVGFrame to reflow us as necessary.
  void MaybeReflowFromOuterSVGFrame();

protected:
  // implementation helpers:
  void DoReflow();
  void RequestReflow(nsIPresShell::IntrinsicDirty aType);
  void UpdateGraphic();
  already_AddRefed<nsIDOMSVGMatrix> GetTMIncludingOffset();
  nsresult TransformPointFromOuterPx(const nsPoint &aIn, nsPoint* aOut);
  void FlushDirtyRegion();

  // If width or height is less than or equal to zero we must disable rendering
  PRBool IsDisabled() const { return mRect.width <= 0 || mRect.height <= 0; }

  nsCOMPtr<nsIDOMSVGMatrix> mCanvasTM;
  nsCOMPtr<nsIDOMSVGMatrix> mOverrideCTM;
  nsRegion                  mDirtyRegion;

  PRPackedBool mPropagateTransform;
  PRPackedBool mInReflow;
};

#endif