зеркало из https://github.com/mozilla/gecko-dev.git
206 строки
8.5 KiB
C++
206 строки
8.5 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: NPL 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 Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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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 Communicator client code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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 NPL, 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 NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsGfxScrollFrame_h___
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#define nsGfxScrollFrame_h___
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#include "nsHTMLContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsBoxFrame.h"
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#include "nsIScrollableFrame.h"
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class nsISupportsArray;
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class nsGfxScrollFrameInner;
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/**
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* The scroll frame creates and manages the scrolling view
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*
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* It only supports having a single child frame that typically is an area
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* frame, but doesn't have to be. The child frame must have a view, though
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*
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* Scroll frames don't support incremental changes, i.e. you can't replace
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* or remove the scrolled frame
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*/
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class nsGfxScrollFrame : public nsBoxFrame,
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public nsIScrollableFrame,
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public nsIAnonymousContentCreator {
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public:
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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,
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nsIFrame* aParent,
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nsStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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virtual ~nsGfxScrollFrame();
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// Called to set the child frames. We typically have three: the scroll area,
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// the vertical scrollbar, and the horizontal scrollbar.
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NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList);
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NS_IMETHOD Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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// Because there can be only one child frame, these two function return
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// NS_ERROR_FAILURE
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NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD ReplaceFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame,
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nsIFrame* aNewFrame);
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NS_IMETHOD Destroy(nsIPresContext* aPresContext);
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// This function returns NS_ERROR_NOT_IMPLEMENTED
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NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame);
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NS_IMETHOD Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
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const nsPoint& aPoint,
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nsIContent ** aNewContent,
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PRInt32& aContentOffset,
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PRInt32& aContentOffsetEnd,
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PRBool& aBeginFrameContent);
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// nsIAnonymousContentCreator
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NS_IMETHOD CreateAnonymousContent(nsIPresContext* aPresContext,
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nsISupportsArray& aAnonymousItems);
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NS_IMETHOD CreateFrameFor(nsIPresContext* aPresContext,
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nsIContent * aContent,
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nsIFrame** aFrame) { if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }
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// nsIBox methods
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NS_DECL_ISUPPORTS
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NS_IMETHOD GetPrefSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
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NS_IMETHOD GetMinSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
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NS_IMETHOD GetMaxSize(nsBoxLayoutState& aBoxLayoutState, nsSize& aSize);
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NS_IMETHOD GetAscent(nsBoxLayoutState& aBoxLayoutState, nscoord& aAscent);
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NS_IMETHOD DoLayout(nsBoxLayoutState& aBoxLayoutState);
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NS_IMETHOD GetPadding(nsMargin& aPadding);
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// nsIScrollableFrame
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NS_IMETHOD SetScrolledFrame(nsIPresContext* aPresContext, nsIFrame *aScrolledFrame);
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NS_IMETHOD GetScrolledFrame(nsIPresContext* aPresContext, nsIFrame *&aScrolledFrame) const;
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NS_IMETHOD GetScrollbarVisibility(nsIPresContext* aPresContext,
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PRBool *aVerticalVisible,
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PRBool *aHorizontalVisible) const;
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NS_IMETHOD GetScrollableView(nsIPresContext* aContext, nsIScrollableView** aResult);
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NS_IMETHOD GetScrollPosition(nsIPresContext* aContext, nscoord &aX, nscoord& aY) const;
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NS_IMETHOD ScrollTo(nsIPresContext* aContext, nscoord aX, nscoord aY, PRUint32 aFlags);
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NS_IMETHOD SetScrollbarVisibility(nsIPresContext* aPresContext,
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PRBool aVerticalVisible,
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PRBool aHorizontalVisible);
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NS_IMETHOD GetScrollbarBox(PRBool aVertical, nsIBox** aResult);
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NS_IMETHOD CurPosAttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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PRInt32 aModType);
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NS_IMETHOD GetScrollPreference(nsIPresContext* aPresContext, nsScrollPref* aScrollPreference) const;
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virtual nsMargin GetActualScrollbarSizes() const;
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virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::scrollFrame
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*/
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virtual nsIAtom* GetType() const;
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#ifdef NS_DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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virtual nsresult GetContentOf(nsIContent** aContent);
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static nsGfxScrollFrame* GetScrollFrameForPort(nsIFrame* aPort);
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struct ScrollbarStyles {
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// one of NS_STYLE_OVERFLOW_SCROLL, NS_STYLE_OVERFLOW_HIDDEN,
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// NS_STYLE_OVERFLOW_VISIBLE, NS_STYLE_OVERFLOW_AUTO
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PRInt32 mHorizontal;
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PRInt32 mVertical;
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ScrollbarStyles(PRInt32 h, PRInt32 v) : mHorizontal(h), mVertical(v) {}
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};
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virtual ScrollbarStyles GetScrollbarStyles() const;
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protected:
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nsGfxScrollFrame(nsIPresShell* aShell, nsIDocument* aDocument, PRBool aIsRoot);
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virtual PRIntn GetSkipSides() const;
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// If a child frame was added or removed, reload our child frame list
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// We need this if a scrollbar frame is recreated
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void ReloadChildFrames(nsIPresContext* aPresContext);
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private:
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friend class nsGfxScrollFrameInner;
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nsGfxScrollFrameInner* mInner;
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nsIPresContext* mPresContext; // weak reference
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};
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#endif /* nsGfxScrollFrame_h___ */
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