зеркало из https://github.com/mozilla/gecko-dev.git
221 строка
9.1 KiB
C++
221 строка
9.1 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
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsContainerFrame_h___
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#define nsContainerFrame_h___
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#include "nsSplittableFrame.h"
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#include "nsFrameList.h"
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// Option flags for ReflowChild() and FinishReflowChild()
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// member functions
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#define NS_FRAME_NO_MOVE_VIEW 0x0001
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#define NS_FRAME_NO_MOVE_FRAME (0x0002 | NS_FRAME_NO_MOVE_VIEW)
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#define NS_FRAME_NO_SIZE_VIEW 0x0004
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#define NS_FRAME_NO_MOVE_CHILD_VIEWS 0x0008
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#define NS_FRAME_NO_VISIBILITY 0x0010
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/**
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* Implementation of a container frame.
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*/
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class nsContainerFrame : public nsSplittableFrame
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{
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public:
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// nsIFrame overrides
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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 FirstChild(nsIPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame** aFirstChild) const;
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NS_IMETHOD Destroy(nsIPresContext* aPresContext);
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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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NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext,
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const nsPoint& aPoint,
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nsFramePaintLayer aWhichLayer,
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nsIFrame** aFrame);
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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 ReflowDirtyChild(nsIPresShell* aPresShell, nsIFrame* aChild);
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#ifdef DEBUG
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NS_IMETHOD List(nsIPresContext* aPresContext, FILE* out, PRInt32 aIndent) const;
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NS_IMETHOD SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
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#endif
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// nsContainerFrame methods
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virtual void DeleteChildsNextInFlow(nsIPresContext* aPresContext,
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nsIFrame* aChild);
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static PRInt32 LengthOf(nsIFrame* aFrameList) {
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nsFrameList tmp(aFrameList);
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return tmp.GetLength();
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}
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// Positions the frame's view based on the frame's origin
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static void PositionFrameView(nsIPresContext* aPresContext,
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nsIFrame* aKidFrame,
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nsIView* aView);
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// Sets several view attributes:
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// - if requested sizes the frame's view based on the current size and origin.
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// Takes into account the combined area and (if overflow is visible) whether
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// the frame has children that extend outside
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// - opacity
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// - visibility
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// - content transparency
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// - clip
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//
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// Flags:
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// NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
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// don't want to automatically sync the frame and view
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// NS_FRAME_NO_SIZE_VIEW - don't size the view
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static void SyncFrameViewAfterReflow(nsIPresContext* aPresContext,
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nsIFrame* aFrame,
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nsIView* aView,
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const nsRect* aCombinedArea,
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PRUint32 aFlags = 0);
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/**
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* Invokes the WillReflow() function, positions the frame and its view (if
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* requested), and then calls Reflow(). If the reflow succeeds and the child
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* frame is complete, deletes any next-in-flows using DeleteChildsNextInFlow()
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*
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* Flags:
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* NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
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* don't want to automatically sync the frame and view
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* NS_FRAME_NO_MOVE_VIEW - don't move the frame. aX and aY are ignored in this
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* case. Also implies NS_FRAME_NO_MOVE_VIEW
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*/
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nsresult ReflowChild(nsIFrame* aKidFrame,
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nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nscoord aX,
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nscoord aY,
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PRUint32 aFlags,
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nsReflowStatus& aStatus);
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/**
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* The second half of frame reflow. Does the following:
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* - sets the frame's bounds
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* - sizes and positions (if requested) the frame's view. If the frame's final
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* position differs from the current position and the frame itself does not
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* have a view, then any child frames with views are positioned so they stay
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* in sync
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* - sets the view's visibility, opacity, content transparency, and clip
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* - invoked the DidReflow() function
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*
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* Flags:
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* NS_FRAME_NO_MOVE_FRAME - don't move the frame. aX and aY are ignored in this
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* case. Also implies NS_FRAME_NO_MOVE_VIEW
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* NS_FRAME_NO_MOVE_VIEW - don't position the frame's view. Set this if you
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* don't want to automatically sync the frame and view
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* NS_FRAME_NO_SIZE_VIEW - don't size the frame's view
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* NS_FRAME_NO_MOVE_CHILD_VIEWS - don't move child views. This is for the case
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* where the frame's new position differs from its current position and the
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* frame itself doesn't have a view, so moving the frame would cause any child
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* views to be out of sync
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*/
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static nsresult FinishReflowChild(nsIFrame* aKidFrame,
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nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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nscoord aX,
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nscoord aY,
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PRUint32 aFlags);
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static void PositionChildViews(nsIPresContext* aPresContext,
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nsIFrame* aFrame);
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protected:
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nsContainerFrame();
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~nsContainerFrame();
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nsresult GetFrameForPointUsing(nsIPresContext* aPresContext,
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const nsPoint& aPoint,
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nsIAtom* aList,
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nsFramePaintLayer aWhichLayer,
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PRBool aConsiderSelf,
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nsIFrame** aFrame);
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virtual void PaintChildren(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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virtual void PaintChild(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsIFrame* aFrame,
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nsFramePaintLayer aWhichLayer);
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/**
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* Get the frames on the overflow list
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*/
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nsIFrame* GetOverflowFrames(nsIPresContext* aPresContext,
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PRBool aRemoveProperty) const;
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/**
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* Set the overflow list
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*/
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nsresult SetOverflowFrames(nsIPresContext* aPresContext,
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nsIFrame* aOverflowFrames);
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/**
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* Moves any frames on both the prev-in-flow's overflow list and the
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* receiver's overflow to the receiver's child list.
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*
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* Resets the overlist pointers to nsnull, and updates the receiver's child
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* count and content mapping.
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*
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* @return PR_TRUE if any frames were moved and PR_FALSE otherwise
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*/
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PRBool MoveOverflowToChildList(nsIPresContext* aPresContext);
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/**
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* Push aFromChild and its next siblings to the next-in-flow. Change
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* the geometric parent of each frame that's pushed. If there is no
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* next-in-flow the frames are placed on the overflow list (and the
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* geometric parent is left unchanged).
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*
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* Updates the next-in-flow's child count. Does <b>not</b> update the
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* pusher's child count.
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*
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* @param aFromChild the first child frame to push. It is disconnected from
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* aPrevSibling
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* @param aPrevSibling aFromChild's previous sibling. Must not be null.
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* It's an error to push a parent's first child frame
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*/
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void PushChildren(nsIPresContext* aPresContext,
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nsIFrame* aFromChild,
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nsIFrame* aPrevSibling);
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nsFrameList mFrames;
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};
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#endif /* nsContainerFrame_h___ */
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