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64906b0b20
r=troy The problem was the space mgr was computing mCount to be > 2* mSize, which this code couldn't handle correctly. So now if the space mgr computes mCount to be more than twice the size of the current count, we immediately bump up the size to that count.� If more are needed later, the next call will give us twice this number anyway.
127 lines
4.2 KiB
C++
127 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsBlockBandData_h___
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#define nsBlockBandData_h___
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#include "nsISpaceManager.h"
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class nsIPresContext;
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// Number of builtin nsBandTrapezoid's
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#define NS_BLOCK_BAND_DATA_TRAPS 6
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/**
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* Class used to manage processing of the space-manager band data.
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* Provides HTML/CSS specific behavior to the raw data.
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*/
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class nsBlockBandData : public nsBandData {
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public:
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nsBlockBandData();
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~nsBlockBandData();
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// Initialize. This must be called before any of the other methods.
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nsresult Init(nsISpaceManager* aSpaceManager, const nsSize& aSpace);
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// Get some available space. Note that aY is relative to the current
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// space manager translation.
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nsresult GetAvailableSpace(nscoord aY, nsRect& aResult);
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// Clear any current floaters, returning a new Y coordinate
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nscoord ClearFloaters(nscoord aY, PRUint8 aBreakType);
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// Get the raw trapezoid count for this band.
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PRInt32 GetTrapezoidCount() const {
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return mCount;
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}
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const nsBandTrapezoid* GetTrapezoid(PRInt32 aIndex) const {
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return &mTrapezoids[aIndex];
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}
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// Get the number of floaters that are impacting the current
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// band. Note that this value is relative to the current translation
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// in the space manager which means that some floaters may be hidden
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// by the translation and therefore won't be in the count.
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PRInt32 GetFloaterCount() const {
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return mLeftFloaters + mRightFloaters;
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}
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PRInt32 GetLeftFloaterCount() const {
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return mLeftFloaters;
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}
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PRInt32 GetRightFloaterCount() const {
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return mRightFloaters;
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}
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// Return the impact on the max-element-size for this band by
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// computing the maximum width and maximum height of all the
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// floaters.
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void GetMaxElementSize(nsIPresContext* aPresContext,
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nscoord* aWidthResult, nscoord* aHeightResult) const;
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// Utility method to save away the max-element-size associated with
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// a floating frame.
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static void StoreMaxElementSize(nsIPresContext* aPresContext,
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nsIFrame* aFrame,
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const nsSize& aMaxElementSize);
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// Utility method to recover a stored max-element-size value
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// associated with a floating frame.
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static void RecoverMaxElementSize(nsIPresContext* aPresContext,
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nsIFrame* aFrame,
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nsSize* aResult);
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protected:
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/** utility method to calculate the band data at aY.
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* nsBlockBandData methods should never call
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* mSpaceManager->GetBandData directly.
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* They should always call this method instead so data members
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* mTrapezoid, mCount, and mSize all get managed properly.
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*/
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nsresult GetBandData(nscoord aY);
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// The spacemanager we are getting space from
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nsISpaceManager* mSpaceManager;
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nscoord mSpaceManagerX, mSpaceManagerY;
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// Limit to the available space (set by Init)
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nsSize mSpace;
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// Trapezoids used during band processing
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nsBandTrapezoid mData[NS_BLOCK_BAND_DATA_TRAPS];
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// Bounding rect of available space between any left and right floaters
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nsRect mAvailSpace;
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// Number of left/right floaters in the current band. Note that this
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// number may be less than the total number of floaters present in
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// the band, if our translation in the space manager "hides" some
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// floaters.
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PRInt32 mLeftFloaters, mRightFloaters;
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void ComputeAvailSpaceRect();
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PRBool ShouldClearFrame(nsIFrame* aFrame, PRUint8 aBreakType);
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};
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#endif /* nsBlockBandData_h___ */
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