gecko/layout/generic/nsHTMLCanvasFrame.h

125 lines
4.3 KiB
C
Raw Normal View History

/* -*- 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Vladimir Vukicevic <vladimir@pobox.com>
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* rendering object for the HTML <canvas> element */
#ifndef nsHTMLCanvasFrame_h___
#define nsHTMLCanvasFrame_h___
#include "nsContainerFrame.h"
#include "nsString.h"
#include "nsAString.h"
#include "nsIIOService.h"
#include "Layers.h"
#include "ImageLayers.h"
class nsPresContext;
class nsDisplayItem;
nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
class nsHTMLCanvasFrame : public nsContainerFrame
{
public:
typedef mozilla::layers::Layer Layer;
typedef mozilla::layers::LayerManager LayerManager;
NS_DECL_FRAMEARENA_HELPERS
nsHTMLCanvasFrame(nsStyleContext* aContext) : nsContainerFrame(aContext) {}
NS_IMETHOD Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow);
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
LayerManager* aManager,
nsDisplayItem* aItem);
/* get the size of the canvas's image */
nsIntSize GetCanvasSize();
virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
virtual nsSize GetIntrinsicRatio();
virtual nsSize ComputeSize(nsRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder, nsSize aPadding,
bool aShrinkWrap);
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
nsRect GetInnerArea() const;
#ifdef ACCESSIBILITY
virtual already_AddRefed<nsAccessible> CreateAccessible();
#endif
virtual nsIAtom* GetType() const;
virtual bool IsFrameOfType(PRUint32 aFlags) const
{
return nsSplittableFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));
}
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
// Inserted child content gets its frames parented by our child block
virtual nsIFrame* GetContentInsertionFrame() {
return GetFirstPrincipalChild()->GetContentInsertionFrame();
}
protected:
virtual ~nsHTMLCanvasFrame();
nscoord GetContinuationOffset(nscoord* aWidth = 0) const;
nsMargin mBorderPadding;
};
#endif /* nsHTMLCanvasFrame_h___ */