mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-25 13:51:41 +00:00
119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
/* -*- 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 for rendering objects that can be split across lines,
|
|
* columns, or pages
|
|
*/
|
|
|
|
#ifndef nsSplittableFrame_h___
|
|
#define nsSplittableFrame_h___
|
|
|
|
#include "nsFrame.h"
|
|
|
|
// Derived class that allows splitting
|
|
class nsSplittableFrame : public nsFrame
|
|
{
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
NS_IMETHOD Init(nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIFrame* aPrevInFlow);
|
|
|
|
virtual nsSplittableType GetSplittableType() const;
|
|
|
|
virtual void Destroy();
|
|
|
|
/*
|
|
* Frame continuations can be either fluid or not:
|
|
* Fluid continuations ("in-flows") are the result of line breaking,
|
|
* column breaking, or page breaking.
|
|
* Other (non-fluid) continuations can be the result of BiDi frame splitting.
|
|
* A "flow" is a chain of fluid continuations.
|
|
*/
|
|
|
|
// Get the previous/next continuation, regardless of its type (fluid or non-fluid).
|
|
virtual nsIFrame* GetPrevContinuation() const;
|
|
virtual nsIFrame* GetNextContinuation() const;
|
|
|
|
// Set a previous/next non-fluid continuation.
|
|
NS_IMETHOD SetPrevContinuation(nsIFrame*);
|
|
NS_IMETHOD SetNextContinuation(nsIFrame*);
|
|
|
|
// Get the first/last continuation for this frame.
|
|
virtual nsIFrame* GetFirstContinuation() const;
|
|
virtual nsIFrame* GetLastContinuation() const;
|
|
|
|
#ifdef DEBUG
|
|
// Can aFrame2 be reached from aFrame1 by following prev/next continuations?
|
|
static PRBool IsInPrevContinuationChain(nsIFrame* aFrame1, nsIFrame* aFrame2);
|
|
static PRBool IsInNextContinuationChain(nsIFrame* aFrame1, nsIFrame* aFrame2);
|
|
#endif
|
|
|
|
// Get the previous/next continuation, only if it is fluid (an "in-flow").
|
|
nsIFrame* GetPrevInFlow() const;
|
|
nsIFrame* GetNextInFlow() const;
|
|
|
|
virtual nsIFrame* GetPrevInFlowVirtual() const { return GetPrevInFlow(); }
|
|
virtual nsIFrame* GetNextInFlowVirtual() const { return GetNextInFlow(); }
|
|
|
|
// Set a previous/next fluid continuation.
|
|
NS_IMETHOD SetPrevInFlow(nsIFrame*);
|
|
NS_IMETHOD SetNextInFlow(nsIFrame*);
|
|
|
|
// Get the first/last frame in the current flow.
|
|
virtual nsIFrame* GetFirstInFlow() const;
|
|
virtual nsIFrame* GetLastInFlow() const;
|
|
|
|
// Remove the frame from the flow. Connects the frame's prev-in-flow
|
|
// and its next-in-flow. This should only be called in frame Destroy() methods.
|
|
static void RemoveFromFlow(nsIFrame* aFrame);
|
|
|
|
protected:
|
|
nsSplittableFrame(nsStyleContext* aContext) : nsFrame(aContext) {}
|
|
|
|
#ifdef DEBUG
|
|
virtual void DumpBaseRegressionData(nsPresContext* aPresContext, FILE* out, PRInt32 aIndent);
|
|
#endif
|
|
|
|
nsIFrame* mPrevContinuation;
|
|
nsIFrame* mNextContinuation;
|
|
};
|
|
|
|
#endif /* nsSplittableFrame_h___ */
|