зеркало из https://github.com/mozilla/pjs.git
284 строки
12 KiB
C++
284 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* base class #1 for rendering objects that have child lists */
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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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#include "nsLayoutUtils.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_VISIBILITY 0x0008
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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 Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD SetInitialChildList(nsIAtom* aListName,
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nsIFrame* aChildList);
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NS_IMETHOD AppendFrames(nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD RemoveFrame(nsIAtom* aListName,
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nsIFrame* aOldFrame);
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virtual nsIFrame* GetFirstChild(nsIAtom* aListName) const;
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virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
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virtual void Destroy();
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virtual void ChildIsDirty(nsIFrame* aChild);
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virtual PRBool IsLeaf() const;
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virtual PRBool PeekOffsetNoAmount(PRBool aForward, PRInt32* aOffset);
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virtual PRBool PeekOffsetCharacter(PRBool aForward, PRInt32* aOffset);
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#ifdef DEBUG
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NS_IMETHOD List(FILE* out, PRInt32 aIndent) const;
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#endif
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// nsContainerFrame methods
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virtual void DeleteNextInFlowChild(nsPresContext* aPresContext,
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nsIFrame* aNextInFlow);
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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(nsIFrame* aKidFrame);
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// Set the view's size and position after its frame has been reflowed.
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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(nsPresContext* 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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// Sets view attributes from the frame style that depend on the view's size
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// (clip, transparency). This needs to be called if you change the size of
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// a view and the view's frame could have clipping set on it.
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// @param aStyleContext can be null, in which case the frame's style context is used
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static void SyncFrameViewAfterSizeChange(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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nsStyleContext* aStyleContext,
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nsIView* aView,
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PRUint32 aFlags = 0);
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// Sets the view's attributes from the frame style.
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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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// Call this when one of these styles changes or when the view has just
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// been created.
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// @param aStyleContext can be null, in which case the frame's style context is used
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static void SyncFrameViewProperties(nsPresContext* aPresContext,
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nsIFrame* aFrame,
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nsStyleContext* aStyleContext,
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nsIView* aView,
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PRUint32 aFlags = 0);
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// Returns PR_TRUE if the frame requires a view
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static PRBool FrameNeedsView(nsIFrame* aFrame);
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// Used by both nsInlineFrame and nsFirstLetterFrame.
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void DoInlineIntrinsicWidth(nsIRenderingContext *aRenderingContext,
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InlineIntrinsicWidthData *aData,
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nsLayoutUtils::IntrinsicWidthType aType);
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/**
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* This is the CSS block concept of computing 'auto' widths, which most
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* classes derived from nsContainerFrame want.
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*/
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virtual nsSize ComputeAutoSize(nsIRenderingContext *aRenderingContext,
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nsSize aCBSize, nscoord aAvailableWidth,
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nsSize aMargin, nsSize aBorder,
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nsSize aPadding, PRBool aShrinkWrap);
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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 DeleteNextInFlowChild()
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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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nsPresContext* 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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*/
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static nsresult FinishReflowChild(nsIFrame* aKidFrame,
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nsPresContext* aPresContext,
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const nsHTMLReflowState* aReflowState,
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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(nsIFrame* aFrame);
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/**
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* Builds display lists for the children. The background
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* of each child is placed in the Content() list (suitable for inline
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* children and other elements that behave like inlines,
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* but not for in-flow block children of blocks). DOES NOT
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* paint the background/borders/outline of this frame. This should
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* probably be avoided and eventually removed. It's currently here
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* to emulate what nsContainerFrame::Paint did.
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*/
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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protected:
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nsContainerFrame(nsStyleContext* aContext) : nsSplittableFrame(aContext) {}
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~nsContainerFrame();
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/**
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* Builds a display list for non-block children that behave like
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* inlines. This puts the background of each child into the
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* Content() list (suitable for inline children but not for
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* in-flow block children of blocks).
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* @param aForcePseudoStack forces each child into a pseudo-stacking-context
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* so its background and all other display items (except for positioned
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* display items) go into the Content() list.
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*/
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nsresult BuildDisplayListForNonBlockChildren(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists,
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PRUint32 aFlags = 0);
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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(nsPresContext* 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(nsPresContext* 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(nsPresContext* 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(nsPresContext* aPresContext,
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nsIFrame* aFromChild,
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nsIFrame* aPrevSibling);
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/**
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* A helper for frames corresponding to generated content, which is used to
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* remove the generated content from the tree when the :before or :after
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* frame is destroyed.
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*/
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static void CleanupGeneratedContentIn(nsIContent* aRealContent,
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nsIFrame* aRoot);
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nsFrameList mFrames;
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};
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#endif /* nsContainerFrame_h___ */
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