gecko-dev/layout/generic/nsGfxScrollFrame.h

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C
Исходник Обычный вид История

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
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*
* 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.
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*
* The Original Code is Mozilla Communicator client code.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
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*/
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#ifndef nsGfxScrollFrame_h___
#define nsGfxScrollFrame_h___
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#include "nsHTMLContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
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#include "nsBoxFrame.h"
#include "nsIScrollableFrame.h"
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class nsISupportsArray;
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class nsGfxScrollFrameInner;
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/**
* The scroll frame creates and manages the scrolling view
*
* It only supports having a single child frame that typically is an area
* frame, but doesn't have to be. The child frame must have a view, though
*
* Scroll frames don't support incremental changes, i.e. you can't replace
* or remove the scrolled frame
*/
class nsGfxScrollFrame : public nsBoxFrame,
public nsIScrollableFrame,
public nsIAnonymousContentCreator {
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public:
friend nsresult NS_NewGfxScrollFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame,
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nsIDocument* aDocument, PRBool aIsRoot);
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NS_IMETHOD Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
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virtual ~nsGfxScrollFrame();
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// Called to set the one and only child frame. Returns NS_ERROR_INVALID_ARG
// if the child frame is NULL, and NS_ERROR_UNEXPECTED if the child list
// contains more than one frame
NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
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nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
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// Because there can be only one child frame, these two function return
// NS_ERROR_FAILURE
NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame);
NS_IMETHOD Destroy(nsIPresContext* aPresContext);
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// This function returns NS_ERROR_NOT_IMPLEMENTED
NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags = 0);
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NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
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// nsIAnonymousContentCreator
NS_IMETHOD CreateAnonymousContent(nsIPresContext* aPresContext,
nsISupportsArray& aAnonymousItems);
NS_IMETHOD CreateFrameFor(nsIPresContext* aPresContext,
nsIContent * aContent,
nsIFrame** aFrame) { if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }
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// nsIBox methods
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NS_DECL_ISUPPORTS
NS_IMETHOD GetPrefSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
NS_IMETHOD GetMinSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
NS_IMETHOD GetMaxSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
NS_IMETHOD GetAscent(nsBoxLayoutState& aBoxLayoutState, nscoord& aAscent);
NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
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NS_IMETHOD GetPadding(nsMargin& aPadding);
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// nsIScrollableFrame
NS_IMETHOD SetScrolledFrame(nsIPresContext* aPresContext, nsIFrame *aScrolledFrame);
NS_IMETHOD GetScrolledFrame(nsIPresContext* aPresContext, nsIFrame *&aScrolledFrame) const;
NS_IMETHOD GetScrollbarVisibility(nsIPresContext* aPresContext,
PRBool *aVerticalVisible,
PRBool *aHorizontalVisible) const;
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NS_IMETHOD GetScrollableView(nsIPresContext* aContext, nsIScrollableView** aResult);
NS_IMETHOD GetScrollPosition(nsIPresContext* aContext, nscoord &aX, nscoord& aY) const;
NS_IMETHOD ScrollTo(nsIPresContext* aContext, nscoord aX, nscoord aY, PRUint32 aFlags);
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NS_IMETHOD SetScrollbarVisibility(nsIPresContext* aPresContext,
PRBool aVerticalVisible,
PRBool aHorizontalVisible);
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NS_IMETHOD GetScrollbarBox(PRBool aVertical, nsIBox** aResult);
NS_IMETHOD GetClipSize(nsIPresContext* aPresContext,
nscoord *aWidth,
nscoord *aHeight) const;
NS_IMETHOD GetScrollPreference(nsIPresContext* aPresContext, nsScrollPref* aScrollPreference) const;
NS_IMETHOD GetScrollbarSizes(nsIPresContext* aPresContext,
nscoord *aVbarWidth,
nscoord *aHbarHeight) const;
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/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::scrollFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
#ifdef NS_DEBUG
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NS_IMETHOD GetFrameName(nsString& aResult) const;
#endif
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virtual nsresult GetContentOf(nsIContent** aContent);
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protected:
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nsGfxScrollFrame(nsIPresShell* aShell, nsIDocument* aDocument, PRBool aIsRoot);
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virtual PRIntn GetSkipSides() const;
private:
friend class nsGfxScrollFrameInner;
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nsGfxScrollFrameInner* mInner;
nsIPresContext* mPresContext; // weak reference
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};
#endif /* nsScrollFrame_h___ */