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gecko-dev/layout/generic/nsGfxScrollFrame.h

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/* -*- 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 Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* 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 ***** */
#ifndef nsGfxScrollFrame_h___
#define nsGfxScrollFrame_h___
#include "nsHTMLContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsBoxFrame.h"
#include "nsIScrollableFrame.h"
#include "nsIScrollPositionListener.h"
class nsISupportsArray;
class nsIScrollableView;
class nsIPresContext;
class nsIPresShell;
class nsIContent;
class nsIAtom;
class nsIDocument;
class nsIScrollFrameInternal;
class nsGfxScrollFrameInner : public nsIScrollPositionListener {
public:
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr);
NS_IMETHOD_(nsrefcnt) AddRef(void);
NS_IMETHOD_(nsrefcnt) Release(void);
nsGfxScrollFrameInner(nsBoxFrame* aOuter);
typedef nsIScrollableFrame::ScrollbarStyles ScrollbarStyles;
ScrollbarStyles GetScrollbarStylesFromFrame() const;
nsIScrollableFrame::nsScrollPref GetScrollPreference() const;
// If a child frame was added or removed on the scrollframe,
// reload our child frame list.
// We need this if a scrollbar frame is recreated.
void ReloadChildFrames();
void CreateAnonymousContent(nsISupportsArray& aAnonymousChildren);
// nsIScrollPositionListener
NS_IMETHOD ScrollPositionWillChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY);
NS_IMETHOD ScrollPositionDidChange(nsIScrollableView* aScrollable, nscoord aX, nscoord aY);
// This gets called when the 'curpos' attribute on one of the scrollbars changes
nsresult CurPosAttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aModType);
PRBool SetAttribute(nsIBox* aBox, nsIAtom* aAtom, nscoord aSize, PRBool aReflow=PR_TRUE);
PRInt32 GetIntegerAttribute(nsIBox* aFrame, nsIAtom* atom, PRInt32 defaultValue);
nsresult Layout(nsBoxLayoutState& aState);
nsresult LayoutBox(nsBoxLayoutState& aState, nsIBox* aBox, const nsRect& aRect);
// Like ScrollPositionDidChange, but initiated by this frame rather than from the
// scrolling view
void InternalScrollPositionDidChange(nscoord aX, nscoord aY);
PRBool AddRemoveScrollbar (PRBool& aHasScrollbar,
nscoord& aXY,
nscoord& aSize,
nscoord aSbSize,
PRBool aOnRightOrBottom,
PRBool aAdd);
PRBool AddRemoveScrollbar(nsBoxLayoutState& aState,
nsRect& aScrollAreaSize,
PRBool aOnTop,
PRBool aHorizontal,
PRBool aAdd);
PRBool AddHorizontalScrollbar (nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnBottom);
PRBool AddVerticalScrollbar (nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnRight);
void RemoveHorizontalScrollbar(nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnBottom);
void RemoveVerticalScrollbar (nsBoxLayoutState& aState, nsRect& aScrollAreaSize, PRBool aOnRight);
nsIScrollableView* GetScrollableView() const;
void ScrollbarChanged(nsIPresContext* aPresContext, nscoord aX, nscoord aY, PRUint32 aFlags);
void SetScrollbarVisibility(nsIBox* aScrollbar, PRBool aVisible);
NS_IMETHOD GetScrolledSize(nsIPresContext* aPresContext,
nscoord *aWidth,
nscoord *aHeight) const;
void AdjustReflowStateForPrintPreview(nsBoxLayoutState& aState, PRBool& aSetBack);
void AdjustReflowStateBack(nsBoxLayoutState& aState, PRBool aSetBack);
nsIBox* mHScrollbarBox;
nsIBox* mVScrollbarBox;
nsIBox* mScrollAreaBox;
nsIBox* mScrollCornerBox;
nscoord mOnePixel;
nsBoxFrame* mOuter;
nscoord mMaxElementWidth;
// The last dir value we saw in AddHorizontalScrollbar. Use PRInt16
// so we can fit all the possible values of a PRUint8 and have a -1
// value that indicates "not set")
PRInt16 mLastDir;
PRPackedBool mNeverHasVerticalScrollbar;
PRPackedBool mNeverHasHorizontalScrollbar;
PRPackedBool mHasVerticalScrollbar;
PRPackedBool mHasHorizontalScrollbar;
PRPackedBool mFirstPass;
PRPackedBool mIsRoot;
PRPackedBool mNeverReflowed;
PRPackedBool mViewInitiatedScroll;
PRPackedBool mFrameInitiatedScroll;
};
/**
* 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 nsHTMLScrollFrame : public nsBoxFrame,
public nsIScrollableFrame,
public nsIAnonymousContentCreator {
public:
friend nsresult NS_NewHTMLScrollFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame,
PRBool aIsRoot);
// Called to set the child frames. We typically have three: the scroll area,
// the vertical scrollbar, and the horizontal scrollbar.
NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// Because there can be only one child frame, these two function return
// NS_ERROR_FAILURE
NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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);
NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
// 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; }
// nsIBox methods
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);
NS_IMETHOD GetPadding(nsMargin& aPadding);
// nsIScrollableFrame
NS_IMETHOD GetScrolledFrame(nsIPresContext* aPresContext, nsIFrame *&aScrolledFrame) const;
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);
NS_IMETHOD SetScrollbarVisibility(nsIPresContext* aPresContext,
PRBool aVerticalVisible,
PRBool aHorizontalVisible);
NS_IMETHOD GetScrollbarBox(PRBool aVertical, nsIBox** aResult);
NS_IMETHOD CurPosAttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aModType);
NS_IMETHOD GetScrollPreference(nsIPresContext* aPresContext, nsScrollPref* aScrollPreference) const;
virtual nsMargin GetActualScrollbarSizes() const;
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const;
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::scrollFrame
*/
virtual nsIAtom* GetType() const;
#ifdef NS_DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual nsresult GetContentOf(nsIContent** aContent);
protected:
nsHTMLScrollFrame(nsIPresShell* aShell, PRBool aIsRoot);
virtual PRIntn GetSkipSides() const;
private:
friend class nsGfxScrollFrameInner;
nsGfxScrollFrameInner mInner;
};
/**
* 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 nsXULScrollFrame : public nsBoxFrame,
public nsIScrollableFrame,
public nsIAnonymousContentCreator {
public:
friend nsresult NS_NewXULScrollFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame,
PRBool aIsRoot);
// Called to set the child frames. We typically have three: the scroll area,
// the vertical scrollbar, and the horizontal scrollbar.
NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// Because there can be only one child frame, these two function return
// NS_ERROR_FAILURE
NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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);
NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame);
NS_IMETHOD GetContentAndOffsetsFromPoint(nsIPresContext* aCX,
const nsPoint& aPoint,
nsIContent ** aNewContent,
PRInt32& aContentOffset,
PRInt32& aContentOffsetEnd,
PRBool& aBeginFrameContent);
// 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; }
// nsIBox methods
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);
NS_IMETHOD GetPadding(nsMargin& aPadding);
// nsIScrollableFrame
NS_IMETHOD GetScrolledFrame(nsIPresContext* aPresContext, nsIFrame *&aScrolledFrame) const;
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);
NS_IMETHOD SetScrollbarVisibility(nsIPresContext* aPresContext,
PRBool aVerticalVisible,
PRBool aHorizontalVisible);
NS_IMETHOD GetScrollbarBox(PRBool aVertical, nsIBox** aResult);
NS_IMETHOD CurPosAttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aModType);
NS_IMETHOD GetScrollPreference(nsIPresContext* aPresContext, nsScrollPref* aScrollPreference) const;
virtual nsMargin GetActualScrollbarSizes() const;
virtual nsMargin GetDesiredScrollbarSizes(nsBoxLayoutState* aState);
virtual nsGfxScrollFrameInner::ScrollbarStyles GetScrollbarStyles() const;
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::scrollFrame
*/
virtual nsIAtom* GetType() const;
#ifdef NS_DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif
virtual nsresult GetContentOf(nsIContent** aContent);
protected:
nsXULScrollFrame(nsIPresShell* aShell, PRBool aIsRoot);
virtual PRIntn GetSkipSides() const;
private:
friend class nsGfxScrollFrameInner;
nsGfxScrollFrameInner mInner;
};
#endif /* nsGfxScrollFrame_h___ */
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