gecko/layout/generic/nsContainerFrame.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.org 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 ***** */
/* base class #1 for rendering objects that have child lists */
#ifndef nsContainerFrame_h___
#define nsContainerFrame_h___
#include "nsSplittableFrame.h"
#include "nsFrameList.h"
#include "nsLayoutUtils.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_VISIBILITY 0x0008
/**
* Implementation of a container frame.
*/
class nsContainerFrame : public nsSplittableFrame
{
public:
// nsIFrame overrides
NS_IMETHOD Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow);
NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame);
virtual nsIFrame* GetFirstChild(nsIAtom* aListName) const;
virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
virtual void Destroy();
virtual void ChildIsDirty(nsIFrame* aChild);
virtual PRBool IsLeaf() const;
virtual PRBool PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset);
virtual PRBool PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset);
#ifdef DEBUG
NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
#endif
// nsContainerFrame methods
virtual void DeleteNextInFlowChild(nsPresContext* aPresContext,
nsIFrame* aNextInFlow);
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(nsIFrame* aKidFrame);
// Set the view's size and position after its frame has been reflowed.
//
// 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(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsIView* aView,
const nsRect* aCombinedArea,
PRUint32 aFlags = 0);
// Sets the view's attributes from the frame style.
// - opacity
// - visibility
// - content transparency
// - clip
// Call this when one of these styles changes or when the view has just
// been created.
// @param aStyleContext can be null, in which case the frame's style context is used
static void SyncFrameViewProperties(nsPresContext* aPresContext,
nsIFrame* aFrame,
nsStyleContext* aStyleContext,
nsIView* aView,
PRUint32 aFlags = 0);
// Returns PR_TRUE if the frame requires a view
static PRBool FrameNeedsView(nsIFrame* aFrame);
// Used by both nsInlineFrame and nsFirstLetterFrame.
void DoInlineIntrinsicWidth(nsIRenderingContext *aRenderingContext,
InlineIntrinsicWidthData *aData,
nsLayoutUtils::IntrinsicWidthType aType);
/**
* This is the CSS block concept of computing 'auto' widths, which most
* classes derived from nsContainerFrame want.
*/
virtual nsSize ComputeAutoSize(nsIRenderingContext *aRenderingContext,
nsSize aCBSize, nscoord aAvailableWidth,
nsSize aMargin, nsSize aBorder,
nsSize aPadding, PRBool aShrinkWrap);
/**
* 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 DeleteNextInFlowChild()
*
* 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,
nsPresContext* 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
*/
static nsresult FinishReflowChild(nsIFrame* aKidFrame,
nsPresContext* aPresContext,
const nsHTMLReflowState* aReflowState,
nsHTMLReflowMetrics& aDesiredSize,
nscoord aX,
nscoord aY,
PRUint32 aFlags);
static void PositionChildViews(nsIFrame* aFrame);
/**
* Builds display lists for the children. The background
* of each child is placed in the Content() list (suitable for inline
* children and other elements that behave like inlines,
* but not for in-flow block children of blocks). DOES NOT
* paint the background/borders/outline of this frame. This should
* probably be avoided and eventually removed. It's currently here
* to emulate what nsContainerFrame::Paint did.
*/
NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists);
protected:
nsContainerFrame(nsStyleContext* aContext) : nsSplittableFrame(aContext) {}
~nsContainerFrame();
/**
* Builds a display list for non-block children that behave like
* inlines. This puts the background of each child into the
* Content() list (suitable for inline children but not for
* in-flow block children of blocks).
* @param aForcePseudoStack forces each child into a pseudo-stacking-context
* so its background and all other display items (except for positioned
* display items) go into the Content() list.
*/
nsresult BuildDisplayListForNonBlockChildren(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists,
PRUint32 aFlags = 0);
/**
* Get the frames on the overflow list
*/
nsIFrame* GetOverflowFrames(nsPresContext* aPresContext,
PRBool aRemoveProperty) const;
/**
* Set the overflow list
*/
nsresult SetOverflowFrames(nsPresContext* 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(nsPresContext* 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(nsPresContext* aPresContext,
nsIFrame* aFromChild,
nsIFrame* aPrevSibling);
/**
* A helper for frames corresponding to generated content, which is used to
* remove the generated content from the tree when the :before or :after
* frame is destroyed.
*/
static void CleanupGeneratedContentIn(nsIContent* aRealContent,
nsIFrame* aRoot);
nsFrameList mFrames;
};
#endif /* nsContainerFrame_h___ */