зеркало из https://github.com/mozilla/gecko-dev.git
116 строки
4.0 KiB
C++
116 строки
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Vladimir Vukicevic <vladimir@pobox.com>
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* rendering object for the HTML <canvas> element */
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#ifndef nsHTMLCanvasFrame_h___
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#define nsHTMLCanvasFrame_h___
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#include "nsSplittableFrame.h"
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#include "nsString.h"
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#include "nsAString.h"
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#include "nsIIOService.h"
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#include "Layers.h"
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#include "ImageLayers.h"
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class nsPresContext;
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class nsDisplayItem;
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nsIFrame* NS_NewHTMLCanvasFrame (nsIPresShell* aPresShell, nsStyleContext* aContext);
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class nsHTMLCanvasFrame : public nsSplittableFrame
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{
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public:
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typedef mozilla::layers::Layer Layer;
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typedef mozilla::layers::LayerManager LayerManager;
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NS_DECL_FRAMEARENA_HELPERS
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nsHTMLCanvasFrame(nsStyleContext* aContext) : nsSplittableFrame(aContext) {}
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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already_AddRefed<Layer> BuildLayer(nsDisplayListBuilder* aBuilder,
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LayerManager* aManager,
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nsDisplayItem* aItem);
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/* get the size of the canvas's image */
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nsIntSize GetCanvasSize();
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virtual nscoord GetMinWidth(nsIRenderingContext *aRenderingContext);
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virtual nscoord GetPrefWidth(nsIRenderingContext *aRenderingContext);
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virtual nsSize GetIntrinsicRatio();
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virtual nsSize ComputeSize(nsIRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder, nsSize aPadding,
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PRBool aShrinkWrap);
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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nsRect GetInnerArea() const;
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#ifdef ACCESSIBILITY
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virtual already_AddRefed<nsAccessible> CreateAccessible();
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#endif
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virtual nsIAtom* GetType() const;
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virtual PRBool IsFrameOfType(PRUint32 aFlags) const
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{
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return nsSplittableFrame::IsFrameOfType(aFlags & ~(nsIFrame::eReplaced));
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}
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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protected:
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virtual ~nsHTMLCanvasFrame();
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nscoord GetContinuationOffset(nscoord* aWidth = 0) const;
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nsMargin mBorderPadding;
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};
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#endif /* nsHTMLCanvasFrame_h___ */
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