зеркало из https://github.com/mozilla/gecko-dev.git
128 строки
4.7 KiB
C++
128 строки
4.7 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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#ifndef nsViewportFrame_h___
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#define nsViewportFrame_h___
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#include "nsContainerFrame.h"
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#include "nsLayoutAtoms.h"
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#include "nsPresContext.h"
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#include "nsReflowPath.h"
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#include "nsIPresShell.h"
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#include "nsAbsoluteContainingBlock.h"
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class nsFixedContainingBlock : public nsAbsoluteContainingBlock {
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public:
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nsFixedContainingBlock() { } // useful for debugging
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virtual ~nsFixedContainingBlock() { } // useful for debugging
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virtual nsIAtom* GetChildListName() const { return nsLayoutAtoms::fixedList; }
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};
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/**
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* ViewportFrame is the parent of a single child - the doc root frame or a scroll frame
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* containing the doc root frame. ViewportFrame stores this child in its primary child
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* list. It stores fixed positioned items in a secondary child list and its mFixedContainer
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* delegate handles them.
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*/
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class ViewportFrame : public nsContainerFrame {
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public:
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ViewportFrame() { } // useful for debugging
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virtual ~ViewportFrame() { } // useful for debugging
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NS_IMETHOD Destroy(nsPresContext* aPresContext);
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NS_IMETHOD SetInitialChildList(nsPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList);
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NS_IMETHOD GetFrameForPoint(nsPresContext* 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 AppendFrames(nsPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD RemoveFrame(nsPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame);
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virtual nsIAtom* GetAdditionalChildListName(PRInt32 aIndex) const;
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virtual nsIFrame* GetFirstChild(nsIAtom* aListName) const;
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NS_IMETHOD Reflow(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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virtual PRBool CanPaintBackground() { return PR_FALSE; }
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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::viewportFrame
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*/
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virtual nsIAtom* GetType() const;
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virtual PRBool IsContainingBlock() const;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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protected:
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nsPoint AdjustReflowStateForScrollbars(nsHTMLReflowState* aReflowState) const;
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protected:
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nsFixedContainingBlock mFixedContainer;
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};
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#endif // nsViewportFrame_h___
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