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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 Communicator client 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 ***** */
#ifndef nsBlockBandData_h___
#define nsBlockBandData_h___
#include "nsSpaceManager.h"
class nsPresContext;
// Number of builtin nsBandTrapezoid's
#define NS_BLOCK_BAND_DATA_TRAPS 6
/**
* Class used to manage processing of the space-manager band data.
* Provides HTML/CSS specific behavior to the raw data.
*/
class nsBlockBandData : public nsBandData {
public:
nsBlockBandData();
~nsBlockBandData();
// Initialize. This must be called before any of the other methods.
nsresult Init(nsSpaceManager* aSpaceManager, const nsSize& aSpace);
// Get some available space. Note that aY is relative to the current
// space manager translation.
nsresult GetAvailableSpace(nscoord aY, PRBool aRelaxHeightConstraint,
nsRect& aResult);
// Get the raw trapezoid count for this band.
PRInt32 GetTrapezoidCount() const {
return mCount;
}
const nsBandTrapezoid* GetTrapezoid(PRInt32 aIndex) const {
return &mTrapezoids[aIndex];
}
// Get the number of floats that are impacting the current
// band. Note that this value is relative to the current translation
// in the space manager which means that some floats may be hidden
// by the translation and therefore won't be in the count.
PRInt32 GetFloatCount() const {
return mLeftFloats + mRightFloats;
}
PRInt32 GetLeftFloatCount() const {
return mLeftFloats;
}
PRInt32 GetRightFloatCount() const {
return mRightFloats;
}
#ifdef DEBUG
void List();
#endif
protected:
/** utility method to calculate the band data at aY.
* nsBlockBandData methods should never call
* mSpaceManager->GetBandData directly.
* They should always call this method instead so data members
* mTrapezoid, mCount, and mSize all get managed properly.
*/
nsresult GetBandData(nscoord aY, PRBool aRelaxHeightConstraint);
// The spacemanager we are getting space from
nsSpaceManager* mSpaceManager;
nscoord mSpaceManagerX, mSpaceManagerY;
// Limit to the available space (set by Init)
nsSize mSpace;
// Trapezoids used during band processing
nsBandTrapezoid mData[NS_BLOCK_BAND_DATA_TRAPS];
// Bounding rect of available space between any left and right floats
nsRect mAvailSpace;
// Number of left/right floats in the current band. Note that this
// number may be less than the total number of floats present in
// the band, if our translation in the space manager "hides" some
// floats.
PRInt32 mLeftFloats, mRightFloats;
void ComputeAvailSpaceRect();
};
#endif /* nsBlockBandData_h___ */
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