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256 lines
12 KiB
C++
256 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 1.0 (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"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the 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 Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#ifndef nsScrollFrame_h___
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#define nsScrollFrame_h___
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#include "nsHTMLContainerFrame.h"
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#include "nsIAnonymousContentCreator.h"
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#include "nsIDocumentObserver.h"
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class nsISupportsArray;
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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 nsHTMLContainerFrame,
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nsIAnonymousContentCreator,
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nsIDocumentObserver {
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public:
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friend nsresult NS_NewGfxScrollFrame(nsIFrame** aNewFrame);
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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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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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// Called to set the one and only child frame. Returns NS_ERROR_INVALID_ARG
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// if the child frame is NULL, and NS_ERROR_UNEXPECTED if the child list
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// contains more than one frame
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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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// 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 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 DidReflow(nsIPresContext& aPresContext,
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nsDidReflowStatus aStatus);
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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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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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// added for anonymous content support
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NS_IMETHOD CreateAnonymousContent(nsISupportsArray& aAnonymousItems);
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
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NS_IMETHOD_(nsrefcnt) AddRef(void) { return NS_OK; }
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NS_IMETHOD_(nsrefcnt) Release(void) { return NS_OK; }
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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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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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// nsIDocumentObserver
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NS_IMETHOD BeginUpdate(nsIDocument *aDocument) { return NS_OK; }
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NS_IMETHOD EndUpdate(nsIDocument *aDocument) { return NS_OK; }
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NS_IMETHOD BeginLoad(nsIDocument *aDocument) { return NS_OK; }
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NS_IMETHOD EndLoad(nsIDocument *aDocument) { return NS_OK; }
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NS_IMETHOD BeginReflow(nsIDocument *aDocument,
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nsIPresShell* aShell) { return NS_OK; }
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NS_IMETHOD EndReflow(nsIDocument *aDocument,
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nsIPresShell* aShell) { return NS_OK; }
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NS_IMETHOD ContentChanged(nsIDocument* aDoc,
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nsIContent* aContent,
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nsISupports* aSubContent) { return NS_OK; }
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NS_IMETHOD ContentStatesChanged(nsIDocument* aDocument,
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nsIContent* aContent1,
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nsIContent* aContent2) { return NS_OK; }
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NS_IMETHOD AttributeChanged(nsIDocument *aDocument,
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nsIContent* aContent,
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nsIAtom* aAttribute,
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PRInt32 aHint);
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NS_IMETHOD ContentAppended(nsIDocument *aDocument,
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nsIContent* aContainer,
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PRInt32 aNewIndexInContainer) { return NS_OK; }
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NS_IMETHOD ContentInserted(nsIDocument *aDocument,
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nsIContent* aContainer,
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nsIContent* aChild,
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PRInt32 aIndexInContainer) { return NS_OK; }
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NS_IMETHOD ContentReplaced(nsIDocument *aDocument,
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nsIContent* aContainer,
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nsIContent* aOldChild,
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nsIContent* aNewChild,
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PRInt32 aIndexInContainer);
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NS_IMETHOD ContentRemoved(nsIDocument *aDocument,
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nsIContent* aContainer,
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nsIContent* aChild,
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PRInt32 aIndexInContainer);
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NS_IMETHOD StyleSheetAdded(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet) { return NS_OK; }
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NS_IMETHOD StyleSheetRemoved(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet) { return NS_OK; }
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NS_IMETHOD StyleSheetDisabledStateChanged(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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PRBool aDisabled) { return NS_OK; }
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NS_IMETHOD StyleRuleChanged(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule,
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PRInt32 aHint) { return NS_OK; }
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NS_IMETHOD StyleRuleAdded(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule) { return NS_OK; }
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NS_IMETHOD StyleRuleRemoved(nsIDocument *aDocument,
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nsIStyleSheet* aStyleSheet,
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nsIStyleRule* aStyleRule) { return NS_OK; }
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NS_IMETHOD DocumentWillBeDestroyed(nsIDocument *aDocument) { return NS_OK; }
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protected:
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nsGfxScrollFrame();
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virtual PRIntn GetSkipSides() const;
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virtual void ScrollbarChanged(nscoord aX, nscoord aY);
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private:
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void SetAttribute(nsIFrame* aFrame, nsIAtom* aAtom, nscoord aSize);
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nsresult CalculateChildTotalSize(nsIFrame* aKidFrame,
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nsHTMLReflowMetrics& aKidReflowMetrics);
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nsresult GetFrameSize( nsIFrame* aFrame,
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nsSize& aSize);
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nsresult SetFrameSize( nsIFrame* aFrame,
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nsSize aSize);
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nsresult CalculateScrollAreaSize(nsIPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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const nsSize& aSbSize,
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nsSize& aScrollAreaSize);
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void SetScrollbarVisibility(nsIFrame* aScrollbar, PRBool aVisible);
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void DetermineReflowNeed(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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PRBool& aHscrollbarNeedsReflow,
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PRBool& aVscrollbarNeedsReflow,
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PRBool& aScrollAreaNeedsReflow,
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nsIFrame*& aIncrementalChild);
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void ReflowScrollbars( nsIPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus,
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PRBool& aHscrollbarNeedsReflow,
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PRBool& aVscrollbarNeedsReflow,
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PRBool& aScrollBarResized,
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nsIFrame*& aIncrementalChild);
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void ReflowScrollbar( nsIPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus,
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PRBool& aScrollBarResized,
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nsIFrame* aScrollBarFrame,
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nsIFrame*& aIncrementalChild);
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nsresult ReflowFrame( 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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nsIFrame* aFrame,
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const nsSize& aAvailable,
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const nsSize& aComputed,
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PRBool& aResized,
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nsIFrame*& aIncrementalChild);
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void ReflowScrollArea( 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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PRBool& aHscrollbarNeedsReflow,
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PRBool& aVscrollbarNeedsReflow,
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PRBool& aScrollAreaNeedsReflow,
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nsIFrame*& aIncrementalChild);
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void LayoutChildren(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState);
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void GetScrollbarDimensions(nsIPresContext& aPresContext,
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nsSize& aSbSize);
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void AddRemoveScrollbar (PRBool& aHasScrollbar, nscoord& aSize, nscoord aSbSize, PRBool aAdd);
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void AddHorizontalScrollbar (const nsSize& aSbSize, nsSize& aScrollAreaSize);
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void AddVerticalScrollbar (const nsSize& aSbSize, nsSize& aScrollAreaSize);
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void RemoveHorizontalScrollbar(const nsSize& aSbSize, nsSize& aScrollAreaSize);
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void RemoveVerticalScrollbar (const nsSize& aSbSize, nsSize& aScrollAreaSize);
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nsIScrollableView* GetScrollableView();
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void GetScrolledContentSize(nsSize& aSize);
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nsIFrame* mHScrollbarFrame;
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nsIFrame* mVScrollbarFrame;
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nsIFrame* mScrollAreaFrame;
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PRBool mHasVerticalScrollbar;
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PRBool mHasHorizontalScrollbar;
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nscoord mOnePixel;
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};
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#endif /* nsScrollFrame_h___ */
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