зеркало из https://github.com/mozilla/gecko-dev.git
362 строки
10 KiB
C++
362 строки
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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/* representation of length values in computed style data */
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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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#include "nsCRT.h"
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#include "nsStyleConsts.h"
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class nsString;
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enum nsStyleUnit {
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eStyleUnit_Null = 0, // (no value) value is not specified
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eStyleUnit_Normal = 1, // (no value)
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eStyleUnit_Auto = 2, // (no value)
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eStyleUnit_None = 3, // (no value)
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eStyleUnit_Percent = 10, // (float) 1.0 == 100%
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eStyleUnit_Factor = 11, // (float) a multiplier
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eStyleUnit_Coord = 20, // (nscoord) value is twips
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eStyleUnit_Integer = 30, // (int) value is simple integer
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eStyleUnit_Enumerated = 32 // (int) value has enumerated meaning
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};
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typedef union {
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PRInt32 mInt; // nscoord is a PRInt32 for now
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float mFloat;
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} nsStyleUnion;
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/**
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* Class that hold a single size specification used by the style
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* system. The size specification consists of two parts -- a number
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* and a unit. The number is an integer, a floating point value, an
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* nscoord, or undefined, and the unit is an nsStyleUnit. Checking
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* the unit is a must before asking for the value in any particular
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* form.
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*/
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class nsStyleCoord {
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public:
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nsStyleCoord(nsStyleUnit aUnit = eStyleUnit_Null);
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nsStyleCoord(nscoord aValue);
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nsStyleCoord(PRInt32 aValue, nsStyleUnit aUnit);
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nsStyleCoord(float aValue, nsStyleUnit aUnit);
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inline nsStyleCoord(const nsStyleCoord& aCopy);
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inline nsStyleCoord(const nsStyleUnion& aValue, nsStyleUnit aUnit);
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nsStyleCoord& operator=(const nsStyleCoord& aCopy);
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PRBool operator==(const nsStyleCoord& aOther) const;
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PRBool operator!=(const nsStyleCoord& aOther) const;
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nsStyleUnit GetUnit(void) const {
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NS_ASSERTION(mUnit != eStyleUnit_Null, "reading uninitialized value");
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return mUnit;
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}
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nscoord GetCoordValue(void) const;
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PRInt32 GetIntValue(void) const;
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float GetPercentValue(void) const;
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float GetFactorValue(void) const;
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void GetUnionValue(nsStyleUnion& aValue) const;
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void Reset(void); // sets to null
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void SetCoordValue(nscoord aValue);
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void SetIntValue(PRInt32 aValue, nsStyleUnit aUnit);
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void SetPercentValue(float aValue);
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void SetFactorValue(float aValue);
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void SetNormalValue(void);
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void SetAutoValue(void);
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void SetNoneValue(void);
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public:
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nsStyleUnit mUnit;
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nsStyleUnion mValue;
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};
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/**
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* Class that represents a set of top/right/bottom/left nsStyleCoords.
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* This is commonly used to hold the widths of the borders, margins,
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* or paddings of a box.
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*/
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class nsStyleSides {
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public:
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nsStyleSides(void);
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// nsStyleSides& operator=(const nsStyleSides& aCopy); // use compiler's version
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PRBool operator==(const nsStyleSides& aOther) const;
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PRBool operator!=(const nsStyleSides& aOther) const;
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// aSide is always one of NS_SIDE_* defined in nsStyleConsts.h
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inline nsStyleUnit GetUnit(PRUint8 aSide) const;
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inline nsStyleUnit GetLeftUnit(void) const;
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inline nsStyleUnit GetTopUnit(void) const;
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inline nsStyleUnit GetRightUnit(void) const;
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inline nsStyleUnit GetBottomUnit(void) const;
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inline nsStyleCoord Get(PRUint8 aSide) const;
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inline nsStyleCoord GetLeft() const;
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inline nsStyleCoord GetTop() const;
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inline nsStyleCoord GetRight() const;
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inline nsStyleCoord GetBottom() const;
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void Reset(void);
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inline void Set(PRUint8 aSide, const nsStyleCoord& aCoord);
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inline void SetLeft(const nsStyleCoord& aCoord);
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inline void SetTop(const nsStyleCoord& aCoord);
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inline void SetRight(const nsStyleCoord& aCoord);
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inline void SetBottom(const nsStyleCoord& aCoord);
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protected:
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PRUint8 mUnits[4];
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nsStyleUnion mValues[4];
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};
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/**
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* Class that represents a set of top-left/top-right/bottom-left/bottom-right
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* nsStyleCoord pairs. This is used to hold the dimensions of the
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* corners of a box (for, e.g., border-radius and outline-radius).
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*/
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class nsStyleCorners {
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public:
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nsStyleCorners(void);
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// use compiler's version
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//nsStyleCorners& operator=(const nsStyleCorners& aCopy);
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PRBool operator==(const nsStyleCorners& aOther) const;
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PRBool operator!=(const nsStyleCorners& aOther) const;
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// aCorner is always one of NS_CORNER_* defined in nsStyleConsts.h
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inline nsStyleUnit GetUnit(PRUint8 aHalfCorner) const;
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inline nsStyleCoord Get(PRUint8 aHalfCorner) const;
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void Reset(void);
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inline void Set(PRUint8 aHalfCorner, const nsStyleCoord& aCoord);
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protected:
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PRUint8 mUnits[8];
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nsStyleUnion mValues[8];
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};
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// -------------------------
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// nsStyleCoord inlines
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//
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inline nsStyleCoord::nsStyleCoord(const nsStyleCoord& aCopy)
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: mUnit(aCopy.mUnit)
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{
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if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
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mValue.mFloat = aCopy.mValue.mFloat;
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}
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else {
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mValue.mInt = aCopy.mValue.mInt;
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}
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}
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inline nsStyleCoord::nsStyleCoord(const nsStyleUnion& aValue, nsStyleUnit aUnit)
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: mUnit(aUnit)
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{
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#if PR_BYTES_PER_INT == PR_BYTES_PER_FLOAT
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mValue.mInt = aValue.mInt;
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#else
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memcpy(&mValue, &aValue, sizeof(nsStyleUnion));
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#endif
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}
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inline PRBool nsStyleCoord::operator!=(const nsStyleCoord& aOther) const
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{
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return !((*this) == aOther);
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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_Coord), "not a coord value");
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if (mUnit == eStyleUnit_Coord) {
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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_Enumerated) ||
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(mUnit == eStyleUnit_Integer), "not an int value");
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if ((mUnit == eStyleUnit_Enumerated) ||
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(mUnit == eStyleUnit_Integer)) {
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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::GetPercentValue(void) const
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{
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NS_ASSERTION(mUnit == eStyleUnit_Percent, "not a percent 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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inline float nsStyleCoord::GetFactorValue(void) const
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{
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NS_ASSERTION(mUnit == eStyleUnit_Factor, "not a factor value");
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if (mUnit == eStyleUnit_Factor) {
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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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inline void nsStyleCoord::GetUnionValue(nsStyleUnion& aValue) const
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{
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memcpy(&aValue, &mValue, sizeof(nsStyleUnion));
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}
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// -------------------------
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// nsStyleSides inlines
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//
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inline PRBool nsStyleSides::operator!=(const nsStyleSides& aOther) const
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{
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return !((*this) == aOther);
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}
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inline nsStyleUnit nsStyleSides::GetUnit(PRUint8 aSide) const
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{
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return (nsStyleUnit)mUnits[aSide];
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}
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inline nsStyleUnit nsStyleSides::GetLeftUnit(void) const
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{
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return GetUnit(NS_SIDE_LEFT);
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}
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inline nsStyleUnit nsStyleSides::GetTopUnit(void) const
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{
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return GetUnit(NS_SIDE_TOP);
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}
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inline nsStyleUnit nsStyleSides::GetRightUnit(void) const
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{
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return GetUnit(NS_SIDE_RIGHT);
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}
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inline nsStyleUnit nsStyleSides::GetBottomUnit(void) const
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{
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return GetUnit(NS_SIDE_BOTTOM);
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}
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inline nsStyleCoord nsStyleSides::Get(PRUint8 aSide) const
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{
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return nsStyleCoord(mValues[aSide], nsStyleUnit(mUnits[aSide]));
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}
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inline nsStyleCoord nsStyleSides::GetLeft() const
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{
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return Get(NS_SIDE_LEFT);
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}
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inline nsStyleCoord nsStyleSides::GetTop() const
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{
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return Get(NS_SIDE_TOP);
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}
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inline nsStyleCoord nsStyleSides::GetRight() const
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{
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return Get(NS_SIDE_RIGHT);
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}
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inline nsStyleCoord nsStyleSides::GetBottom() const
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{
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return Get(NS_SIDE_BOTTOM);
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}
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inline void nsStyleSides::Set(PRUint8 aSide, const nsStyleCoord& aCoord)
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{
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mUnits[aSide] = aCoord.GetUnit();
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aCoord.GetUnionValue(mValues[aSide]);
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}
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inline void nsStyleSides::SetLeft(const nsStyleCoord& aCoord)
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{
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Set(NS_SIDE_LEFT, aCoord);
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}
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inline void nsStyleSides::SetTop(const nsStyleCoord& aCoord)
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{
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Set(NS_SIDE_TOP, aCoord);
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}
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inline void nsStyleSides::SetRight(const nsStyleCoord& aCoord)
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{
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Set(NS_SIDE_RIGHT, aCoord);
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}
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inline void nsStyleSides::SetBottom(const nsStyleCoord& aCoord)
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{
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Set(NS_SIDE_BOTTOM, aCoord);
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}
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// -------------------------
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// nsStyleCorners inlines
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//
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inline PRBool nsStyleCorners::operator!=(const nsStyleCorners& aOther) const
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{
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return !((*this) == aOther);
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}
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inline nsStyleUnit nsStyleCorners::GetUnit(PRUint8 aCorner) const
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{
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return (nsStyleUnit)mUnits[aCorner];
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}
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inline nsStyleCoord nsStyleCorners::Get(PRUint8 aCorner) const
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{
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return nsStyleCoord(mValues[aCorner], nsStyleUnit(mUnits[aCorner]));
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}
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inline void nsStyleCorners::Set(PRUint8 aCorner, const nsStyleCoord& aCoord)
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{
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mUnits[aCorner] = aCoord.GetUnit();
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aCoord.GetUnionValue(mValues[aCorner]);
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}
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#endif /* nsStyleCoord_h___ */
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