зеркало из https://github.com/mozilla/gecko-dev.git
153 строки
5.1 KiB
C++
153 строки
5.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* 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 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 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 NPL, 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 NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
#ifndef nsHTMLReflowCommand_h___
|
|
#define nsHTMLReflowCommand_h___
|
|
#include "nsReflowType.h"
|
|
#include "nsVoidArray.h"
|
|
#include <stdio.h>
|
|
|
|
class nsIAtom;
|
|
class nsIFrame;
|
|
class nsIPresContext;
|
|
class nsIRenderingContext;
|
|
struct nsHTMLReflowMetrics;
|
|
struct nsSize;
|
|
|
|
// Reflow command flags
|
|
#define NS_RC_CREATED_DURING_DOCUMENT_LOAD 0x0001
|
|
|
|
|
|
/**
|
|
* A reflow command is an object that is generated in response to a content
|
|
* model change notification. The reflow command is given to a presentation
|
|
* shell where it is queued and then dispatched by invoking the reflow
|
|
* commands's Dispatch() member function.
|
|
*
|
|
* Reflow command processing follows a path from the root frame down to the
|
|
* target frame (the frame for which the reflow command is destined). Reflow
|
|
* commands are processed by invoking the frame's Reflow() member function.
|
|
*
|
|
* The typical flow of control for a given reflow command starts with a content
|
|
* change notification. The content notifications are sent to document observers.
|
|
* The presentation shell forwards the notifications to the style set. The style
|
|
* system responds to the notifications by creating new frame (or destroying
|
|
* existing frames) as appropriate, and then generating a reflow command.
|
|
*
|
|
* @see nsIDocumentObserver
|
|
* @see nsIStyleSet
|
|
* @see nsIFrameReflow#Reflow()
|
|
* @see nsIPresShell#AppendReflowCommand()
|
|
* @see nsIPresShell#ProcessReflowCommands()
|
|
*/
|
|
class nsHTMLReflowCommand {
|
|
public:
|
|
/**
|
|
* Construct an HTML reflow command of type aReflowType and with target
|
|
* frame aTargetFrame. You can also specify an optional child frame, e.g.
|
|
* to indicate the inserted child frame
|
|
*/
|
|
nsHTMLReflowCommand(nsIFrame* aTargetFrame,
|
|
nsReflowType aReflowType,
|
|
nsIFrame* aChildFrame = nsnull,
|
|
nsIAtom* aAttribute = nsnull);
|
|
|
|
~nsHTMLReflowCommand();
|
|
|
|
/**
|
|
* Get the target of the reflow command.
|
|
*/
|
|
nsresult GetTarget(nsIFrame*& aTargetFrame) const;
|
|
|
|
/**
|
|
* Change the target of the reflow command.
|
|
*/
|
|
nsresult SetTarget(nsIFrame* aTargetFrame);
|
|
|
|
/**
|
|
* Get the type of reflow command.
|
|
*/
|
|
nsresult GetType(nsReflowType& aReflowType) const;
|
|
|
|
/**
|
|
* Can return nsnull. If nsnull is not returned, the caller must NS_RELEASE aAttribute
|
|
*/
|
|
nsresult GetAttribute(nsIAtom *& aAttribute) const;
|
|
|
|
/**
|
|
* Get the child frame associated with the reflow command.
|
|
*/
|
|
nsresult GetChildFrame(nsIFrame*& aChildFrame) const;
|
|
|
|
/**
|
|
* Returns the name of the child list to which the child frame belongs.
|
|
* Only used for reflow command types FrameAppended, FrameInserted, and
|
|
* FrameRemoved
|
|
*
|
|
* Returns nsnull if the child frame is associated with the unnamed
|
|
* principal child list
|
|
*/
|
|
nsresult GetChildListName(nsIAtom*& aListName) const;
|
|
|
|
/**
|
|
* Sets the name of the child list to which the child frame belongs.
|
|
* Only used for reflow command types FrameAppended, FrameInserted, and
|
|
* FrameRemoved
|
|
*/
|
|
nsresult SetChildListName(nsIAtom* aListName);
|
|
|
|
/**
|
|
* Dump out the reflow-command to out
|
|
*/
|
|
nsresult List(FILE* out) const;
|
|
|
|
/**
|
|
* Get/set reflow command flags
|
|
*/
|
|
nsresult GetFlags(PRInt32* aFlags);
|
|
nsresult SetFlags(PRInt32 aFlags);
|
|
|
|
private:
|
|
nsReflowType mType;
|
|
nsIFrame* mTargetFrame;
|
|
nsIFrame* mChildFrame;
|
|
nsIAtom* mAttribute;
|
|
nsIAtom* mListName;
|
|
PRInt32 mFlags;
|
|
};
|
|
|
|
#endif /* nsHTMLReflowCommand_h___ */
|