gecko-dev/layout/style/nsStyleCoord.cpp

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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.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
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* 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
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* the provisions above, a recipient may use your version of this file under
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*
* ***** END LICENSE BLOCK ***** */
/* representation of length values in computed style data */
#include "nsStyleCoord.h"
#include "nsString.h"
#include "nsCRT.h"
nsStyleCoord::nsStyleCoord(nsStyleUnit aUnit)
: mUnit(aUnit)
{
NS_ASSERTION(aUnit < eStyleUnit_Percent, "not a valueless unit");
if (aUnit >= eStyleUnit_Percent) {
mUnit = eStyleUnit_Null;
}
mValue.mInt = 0;
}
nsStyleCoord::nsStyleCoord(nscoord aValue)
: mUnit(eStyleUnit_Coord)
{
mValue.mInt = aValue;
}
nsStyleCoord::nsStyleCoord(PRInt32 aValue, nsStyleUnit aUnit)
: mUnit(aUnit)
{
//if you want to pass in eStyleUnit_Coord, don't. instead, use the
//constructor just above this one... MMP
NS_ASSERTION((aUnit == eStyleUnit_Proportional) ||
(aUnit == eStyleUnit_Enumerated) ||
(aUnit == eStyleUnit_Integer), "not an int value");
if ((aUnit == eStyleUnit_Proportional) ||
(aUnit == eStyleUnit_Enumerated) ||
(aUnit == eStyleUnit_Integer)) {
mValue.mInt = aValue;
}
else {
mUnit = eStyleUnit_Null;
mValue.mInt = 0;
}
}
nsStyleCoord::nsStyleCoord(float aValue, nsStyleUnit aUnit)
: mUnit(aUnit)
{
NS_ASSERTION((aUnit == eStyleUnit_Percent) ||
(aUnit == eStyleUnit_Factor), "not a float value");
if ((aUnit == eStyleUnit_Percent) ||
(aUnit == eStyleUnit_Factor)) {
mValue.mFloat = aValue;
}
else {
mUnit = eStyleUnit_Null;
mValue.mInt = 0;
}
}
nsStyleCoord::nsStyleCoord(const nsStyleCoord& aCopy)
: mUnit(aCopy.mUnit)
{
if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
mValue.mFloat = aCopy.mValue.mFloat;
}
else {
mValue.mInt = aCopy.mValue.mInt;
}
}
nsStyleCoord& nsStyleCoord::operator=(const nsStyleCoord& aCopy)
{
mUnit = aCopy.mUnit;
if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
mValue.mFloat = aCopy.mValue.mFloat;
}
else {
mValue.mInt = aCopy.mValue.mInt;
}
return *this;
}
PRBool nsStyleCoord::operator==(const nsStyleCoord& aOther) const
{
if (mUnit == aOther.mUnit) {
if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
return PRBool(mValue.mFloat == aOther.mValue.mFloat);
}
else {
return PRBool(mValue.mInt == aOther.mValue.mInt);
}
}
return PR_FALSE;
}
void nsStyleCoord::Reset(void)
{
mUnit = eStyleUnit_Null;
mValue.mInt = 0;
}
void nsStyleCoord::SetCoordValue(nscoord aValue)
{
mUnit = eStyleUnit_Coord;
mValue.mInt = aValue;
}
void nsStyleCoord::SetIntValue(PRInt32 aValue, nsStyleUnit aUnit)
{
NS_ASSERTION((aUnit == eStyleUnit_Proportional) ||
(aUnit == eStyleUnit_Enumerated) ||
(aUnit == eStyleUnit_Chars) ||
(aUnit == eStyleUnit_Integer), "not an int value");
if ((aUnit == eStyleUnit_Proportional) ||
(aUnit == eStyleUnit_Enumerated) ||
(aUnit == eStyleUnit_Chars) ||
(aUnit == eStyleUnit_Integer)) {
mUnit = aUnit;
mValue.mInt = aValue;
}
else {
Reset();
}
}
void nsStyleCoord::SetPercentValue(float aValue)
{
mUnit = eStyleUnit_Percent;
mValue.mFloat = aValue;
}
void nsStyleCoord::SetFactorValue(float aValue)
{
mUnit = eStyleUnit_Factor;
mValue.mFloat = aValue;
}
void nsStyleCoord::SetNormalValue(void)
{
mUnit = eStyleUnit_Normal;
mValue.mInt = 0;
}
void nsStyleCoord::SetAutoValue(void)
{
mUnit = eStyleUnit_Auto;
mValue.mInt = 0;
}
void nsStyleCoord::SetUnionValue(const nsStyleUnion& aValue, nsStyleUnit aUnit)
{
mUnit = aUnit;
#if PR_BYTES_PER_INT == PR_BYTES_PER_FLOAT
mValue.mInt = aValue.mInt;
#else
memcpy(&mValue, &aValue, sizeof(nsStyleUnion));
#endif
}
void nsStyleCoord::AppendToString(nsString& aBuffer) const
{
if ((eStyleUnit_Percent <= mUnit) && (mUnit < eStyleUnit_Coord)) {
aBuffer.AppendFloat(mValue.mFloat);
}
else if ((eStyleUnit_Coord == mUnit) ||
(eStyleUnit_Proportional == mUnit) ||
(eStyleUnit_Enumerated == mUnit) ||
(eStyleUnit_Integer == mUnit)) {
aBuffer.AppendInt(mValue.mInt, 10);
aBuffer.AppendLiteral("[0x");
aBuffer.AppendInt(mValue.mInt, 16);
aBuffer.Append(PRUnichar(']'));
}
switch (mUnit) {
case eStyleUnit_Null: aBuffer.AppendLiteral("Null"); break;
case eStyleUnit_Coord: aBuffer.AppendLiteral("tw"); break;
case eStyleUnit_Percent: aBuffer.AppendLiteral("%"); break;
case eStyleUnit_Factor: aBuffer.AppendLiteral("f"); break;
case eStyleUnit_Normal: aBuffer.AppendLiteral("Normal"); break;
case eStyleUnit_Auto: aBuffer.AppendLiteral("Auto"); break;
case eStyleUnit_Proportional: aBuffer.AppendLiteral("*"); break;
case eStyleUnit_Enumerated: aBuffer.AppendLiteral("enum"); break;
case eStyleUnit_Integer: aBuffer.AppendLiteral("int"); break;
case eStyleUnit_Chars: aBuffer.AppendLiteral("chars"); break;
}
aBuffer.Append(PRUnichar(' '));
}
void nsStyleCoord::ToString(nsString& aBuffer) const
{
aBuffer.Truncate();
AppendToString(aBuffer);
}
nsStyleSides::nsStyleSides(void)
{
memset(this, 0x00, sizeof(nsStyleSides));
}
#define COMPARE_SIDE(side) \
if ((eStyleUnit_Percent <= mUnits[side]) && \
(mUnits[side] < eStyleUnit_Coord)) { \
if (mValues[side].mFloat != aOther.mValues[side].mFloat) \
return PR_FALSE; \
} \
else { \
if (mValues[side].mInt != aOther.mValues[side].mInt) \
return PR_FALSE; \
}
PRBool nsStyleSides::operator==(const nsStyleSides& aOther) const
{
if ((mUnits[NS_SIDE_LEFT] == aOther.mUnits[NS_SIDE_LEFT]) &&
(mUnits[NS_SIDE_TOP] == aOther.mUnits[NS_SIDE_TOP]) &&
(mUnits[NS_SIDE_RIGHT] == aOther.mUnits[NS_SIDE_RIGHT]) &&
(mUnits[NS_SIDE_BOTTOM] == aOther.mUnits[NS_SIDE_BOTTOM])) {
COMPARE_SIDE(NS_SIDE_LEFT);
COMPARE_SIDE(NS_SIDE_TOP);
COMPARE_SIDE(NS_SIDE_RIGHT);
COMPARE_SIDE(NS_SIDE_BOTTOM);
return PR_TRUE;
}
return PR_FALSE;
}
void nsStyleSides::Reset(void)
{
memset(this, 0x00, sizeof(nsStyleSides));
}
void nsStyleSides::AppendToString(nsString& aBuffer) const
{
nsStyleCoord temp;
GetLeft(temp);
aBuffer.AppendLiteral("left: ");
temp.AppendToString(aBuffer);
GetTop(temp);
aBuffer.AppendLiteral("top: ");
temp.AppendToString(aBuffer);
GetRight(temp);
aBuffer.AppendLiteral("right: ");
temp.AppendToString(aBuffer);
GetBottom(temp);
aBuffer.AppendLiteral("bottom: ");
temp.AppendToString(aBuffer);
}
void nsStyleSides::ToString(nsString& aBuffer) const
{
aBuffer.Truncate();
AppendToString(aBuffer);
}