зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
2.9 KiB
C
100 строки
2.9 KiB
C
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/* -*- 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsStyleCoord_h___
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#define nsStyleCoord_h___
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#include "nscore.h"
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#include "nsCoord.h"
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class nsString;
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enum nsStyleUnit {
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eStyleUnit_Twips = 0, // (nscoord) value is twips
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eStyleUnit_Percent = 1, // (float) 1.0 == 100%
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eStyleUnit_Auto = 2, // (no value)
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eStyleUnit_Inherit = 3, // (no value) value should be inherited
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eStyleUnit_Proportional = 4, // (int) value has proportional meaning
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eStyleUnit_Enumerated = 5, // (int) value has enumerated meaning
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};
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class nsStyleCoord {
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public:
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nsStyleCoord(void); // sets to 0 twips
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nsStyleCoord(nscoord aValue);
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nsStyleCoord(PRInt32 aValue, nsStyleUnit aUnit);
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nsStyleCoord(float aValue);
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nsStyleCoord(const nsStyleCoord& aCopy);
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~nsStyleCoord(void);
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nsStyleCoord& operator=(const nsStyleCoord& aCopy);
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PRBool operator==(const nsStyleCoord& aOther) const;
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nsStyleUnit GetUnit(void) const { return mUnit; }
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nscoord GetCoordValue(void) const;
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PRInt32 GetIntValue(void) const;
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float GetFloatValue(void) const;
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void Set(nscoord aValue);
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void Set(PRInt32 aValue, nsStyleUnit aUnit);
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void Set(float aValue);
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void SetAuto(void);
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void SetInherit(void);
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void AppendToString(nsString& aBuffer) const;
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void ToString(nsString& aBuffer) const;
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protected:
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nsStyleUnit mUnit;
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union {
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PRInt32 mInt; // nscoord is a PRInt32 for now
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float mFloat;
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} mValue;
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};
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inline PRInt32 nsStyleCoord::GetCoordValue(void) const
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{
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NS_ASSERTION((mUnit == eStyleUnit_Twips), "not a coord value");
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if (mUnit == eStyleUnit_Twips) {
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return mValue.mInt;
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}
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return 0;
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}
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inline PRInt32 nsStyleCoord::GetIntValue(void) const
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{
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NS_ASSERTION((mUnit == eStyleUnit_Proportional) ||
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(mUnit == eStyleUnit_Enumerated), "not an int value");
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if ((mUnit == eStyleUnit_Proportional) ||
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(mUnit == eStyleUnit_Enumerated)) {
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return mValue.mInt;
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}
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return 0;
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}
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inline float nsStyleCoord::GetFloatValue(void) const
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{
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NS_ASSERTION(mUnit == eStyleUnit_Percent, "not a float value");
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if (mUnit == eStyleUnit_Percent) {
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return mValue.mFloat;
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}
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return 0.0f;
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}
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#endif /* nsStyleCoord_h___ */
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