gecko-dev/layout/generic/nsContainerFrame.h

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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/
*
* 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.org 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):
*/
#ifndef nsContainerFrame_h___
#define nsContainerFrame_h___
#include "nsSplittableFrame.h"
#include "nsFrameList.h"
// Option flags for ReflowChild() and FinishReflowChild()
// member functions
#define NS_FRAME_NO_MOVE_VIEW 0x0001
#define NS_FRAME_NO_MOVE_FRAME (0x0002 | NS_FRAME_NO_MOVE_VIEW)
#define NS_FRAME_NO_SIZE_VIEW 0x0004
#define NS_FRAME_NO_MOVE_CHILD_VIEWS 0x0008
/**
* Implementation of a container frame.
*/
class nsContainerFrame : public nsSplittableFrame
{
public:
// nsIFrame overrides
NS_IMETHOD SetInitialChildList(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD FirstChild(nsIPresContext* aPresContext,
nsIAtom* aListName,
nsIFrame** aFirstChild) const;
NS_IMETHOD Destroy(nsIPresContext* aPresContext);
NS_IMETHOD Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame);
NS_IMETHOD ReplaceFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame,
nsIFrame* aNewFrame);
NS_IMETHOD ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild);
#ifdef DEBUG
NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
#endif
// nsContainerFrame methods
virtual void DeleteChildsNextInFlow(nsIPresContext* aPresContext,
nsIFrame* aChild);
static PRInt32 LengthOf(nsIFrame* aFrameList) {
nsFrameList tmp(aFrameList);
return tmp.GetLength();
}
// Positions the frame's view based on the frame's origin
static void PositionFrameView(nsIPresContext* aPresContext,
nsIFrame* aKidFrame,
nsIView* aView);
// Sets several view attributes:
// - if requested sizes the frame's view based on the current size and origin.
// Takes into account the combined area and (if overflow is visible) whether
// the frame has children that extend outside
// - opacity
// - visibility
// - content transparency
// - clip
//
// Flags:
// NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
// don't want to automatically sync the frame and view
// NS_FRAME_NO_SIZE_VIEW - don't size the view
static void SyncFrameViewAfterReflow(nsIPresContext* aPresContext,
nsIFrame* aFrame,
nsIView* aView,
const nsRect* aCombinedArea,
PRUint32 aFlags = 0);
/**
* Invokes the WillReflow() function, positions the frame and its view (if
* requested), and then calls Reflow(). If the reflow succeeds and the child
* frame is complete, deletes any next-in-flows using DeleteChildsNextInFlow()
*
* Flags:
* NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
* don't want to automatically sync the frame and view
* NS_FRAME_NO_MOVE_VIEW - don't move the frame. aX and aY are ignored in this
* case. Also implies NS_FRAME_NO_MOVE_VIEW
*/
nsresult ReflowChild(nsIFrame* aKidFrame,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nscoord aX,
nscoord aY,
PRUint32 aFlags,
nsReflowStatus& aStatus);
/**
* The second half of frame reflow. Does the following:
* - sets the frame's bounds
* - sizes and positions (if requested) the frame's view. If the frame's final
* position differs from the current position and the frame itself does not
* have a view, then any child frames with views are positioned so they stay
* in sync
* - sets the view's visibility, opacity, content transparency, and clip
* - invoked the DidReflow() function
*
* Flags:
* NS_FRAME_NO_MOVE_FRAME - don't move the frame. aX and aY are ignored in this
* case. Also implies NS_FRAME_NO_MOVE_VIEW
* NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
* don't want to automatically sync the frame and view
* NS_FRAME_NO_SIZE_VIEW - don't size the frame's view
* NS_FRAME_NO_MOVE_CHILD_VIEWS - don't move child views. This is for the case
* where the frame's new position differs from its current position and the
* frame itself doesn't have a view, so moving the frame would cause any child
* views to be out of sync
*/
static nsresult FinishReflowChild(nsIFrame* aKidFrame,
nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nscoord aX,
nscoord aY,
PRUint32 aFlags);
static void PositionChildViews(nsIPresContext* aPresContext,
nsIFrame* aFrame);
protected:
nsContainerFrame();
~nsContainerFrame();
nsresult GetFrameForPointUsing(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsIAtom* aList,
nsFramePaintLayer aWhichLayer,
PRBool aConsiderSelf,
nsIFrame** aFrame);
virtual void PaintChildren(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
virtual void PaintChild(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsIFrame* aFrame,
nsFramePaintLayer aWhichLayer);
/**
* Get the frames on the overflow list
*/
nsIFrame* GetOverflowFrames(nsIPresContext* aPresContext,
PRBool aRemoveProperty) const;
/**
* Set the overflow list
*/
nsresult SetOverflowFrames(nsIPresContext* aPresContext,
nsIFrame* aOverflowFrames);
/**
* Moves any frames on both the prev-in-flow's overflow list and the
* receiver's overflow to the receiver's child list.
*
* Resets the overlist pointers to nsnull, and updates the receiver's child
* count and content mapping.
*
* @return PR_TRUE if any frames were moved and PR_FALSE otherwise
*/
PRBool MoveOverflowToChildList(nsIPresContext* aPresContext);
/**
* Push aFromChild and its next siblings to the next-in-flow. Change
* the geometric parent of each frame that's pushed. If there is no
* next-in-flow the frames are placed on the overflow list (and the
* geometric parent is left unchanged).
*
* Updates the next-in-flow's child count. Does <b>not</b> update the
* pusher's child count.
*
* @param aFromChild the first child frame to push. It is disconnected from
* aPrevSibling
* @param aPrevSibling aFromChild's previous sibling. Must not be null.
* It's an error to push a parent's first child frame
*/
void PushChildren(nsIPresContext* aPresContext,
nsIFrame* aFromChild,
nsIFrame* aPrevSibling);
nsFrameList mFrames;
};
#endif /* nsContainerFrame_h___ */