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gecko-dev/layout/style/nsStyleCoord.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* representation of length values in computed style data */
#include "nsStyleCoord.h"
#include "nsString.h"
#include "nsCRT.h"
#include "prlog.h"
#include "nsMathUtils.h"
#include "nsStyleContext.h"
#include "mozilla/HashFunctions.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(int32_t 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_Enumerated) ||
(aUnit == eStyleUnit_Integer), "not an int value");
if ((aUnit == eStyleUnit_Enumerated) ||
(aUnit == eStyleUnit_Integer)) {
mValue.mInt = aValue;
}
else {
mUnit = eStyleUnit_Null;
mValue.mInt = 0;
}
}
nsStyleCoord::nsStyleCoord(float aValue, nsStyleUnit aUnit)
: mUnit(aUnit)
{
if (aUnit < eStyleUnit_Percent || aUnit >= eStyleUnit_Coord) {
NS_NOTREACHED("not a float value");
Reset();
} else {
mValue.mFloat = aValue;
}
}
bool nsStyleCoord::operator==(const nsStyleCoord& aOther) const
{
if (mUnit != aOther.mUnit) {
return false;
}
switch (mUnit) {
case eStyleUnit_Null:
case eStyleUnit_Normal:
case eStyleUnit_Auto:
case eStyleUnit_None:
return true;
case eStyleUnit_Percent:
case eStyleUnit_Factor:
case eStyleUnit_Degree:
case eStyleUnit_Grad:
case eStyleUnit_Radian:
case eStyleUnit_Turn:
return mValue.mFloat == aOther.mValue.mFloat;
case eStyleUnit_Coord:
case eStyleUnit_Integer:
case eStyleUnit_Enumerated:
return mValue.mInt == aOther.mValue.mInt;
case eStyleUnit_Calc:
return *this->GetCalcValue() == *aOther.GetCalcValue();
}
NS_ABORT_IF_FALSE(false, "unexpected unit");
return false;
}
uint32_t nsStyleCoord::HashValue(uint32_t aHash = 0) const
{
aHash = mozilla::AddToHash(aHash, mUnit);
switch (mUnit) {
case eStyleUnit_Null:
case eStyleUnit_Normal:
case eStyleUnit_Auto:
case eStyleUnit_None:
return mozilla::AddToHash(aHash, true);
case eStyleUnit_Percent:
case eStyleUnit_Factor:
case eStyleUnit_Degree:
case eStyleUnit_Grad:
case eStyleUnit_Radian:
case eStyleUnit_Turn:
return mozilla::AddToHash(aHash, mValue.mFloat);
case eStyleUnit_Coord:
case eStyleUnit_Integer:
case eStyleUnit_Enumerated:
return mozilla::AddToHash(aHash, mValue.mInt);
case eStyleUnit_Calc:
Calc* calcValue = GetCalcValue();
aHash = mozilla::AddToHash(aHash, calcValue->mLength);
if (HasPercent()) {
return mozilla::AddToHash(aHash, calcValue->mPercent);
}
return aHash;
}
NS_ABORT_IF_FALSE(false, "unexpected unit");
return aHash;
}
void nsStyleCoord::Reset()
{
mUnit = eStyleUnit_Null;
mValue.mInt = 0;
}
void nsStyleCoord::SetCoordValue(nscoord aValue)
{
mUnit = eStyleUnit_Coord;
mValue.mInt = aValue;
}
void nsStyleCoord::SetIntValue(int32_t aValue, nsStyleUnit aUnit)
{
NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
(aUnit == eStyleUnit_Integer), "not an int value");
if ((aUnit == eStyleUnit_Enumerated) ||
(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::SetAngleValue(float aValue, nsStyleUnit aUnit)
{
if (aUnit == eStyleUnit_Degree ||
aUnit == eStyleUnit_Grad ||
aUnit == eStyleUnit_Radian ||
aUnit == eStyleUnit_Turn) {
mUnit = aUnit;
mValue.mFloat = aValue;
} else {
NS_NOTREACHED("not an angle value");
Reset();
}
}
void nsStyleCoord::SetCalcValue(Calc* aValue)
{
mUnit = eStyleUnit_Calc;
mValue.mPointer = aValue;
}
void nsStyleCoord::SetNormalValue()
{
mUnit = eStyleUnit_Normal;
mValue.mInt = 0;
}
void nsStyleCoord::SetAutoValue()
{
mUnit = eStyleUnit_Auto;
mValue.mInt = 0;
}
void nsStyleCoord::SetNoneValue()
{
mUnit = eStyleUnit_None;
mValue.mInt = 0;
}
// accessors that are not inlined
double
nsStyleCoord::GetAngleValueInRadians() const
{
double angle = mValue.mFloat;
switch (GetUnit()) {
case eStyleUnit_Radian: return angle;
case eStyleUnit_Turn: return angle * 2 * M_PI;
case eStyleUnit_Degree: return angle * M_PI / 180.0;
case eStyleUnit_Grad: return angle * M_PI / 200.0;
default:
NS_NOTREACHED("unrecognized angular unit");
return 0.0;
}
}
nsStyleSides::nsStyleSides()
{
memset(this, 0x00, sizeof(nsStyleSides));
}
bool nsStyleSides::operator==(const nsStyleSides& aOther) const
{
NS_FOR_CSS_SIDES(i) {
if (nsStyleCoord(mValues[i], (nsStyleUnit)mUnits[i]) !=
nsStyleCoord(aOther.mValues[i], (nsStyleUnit)aOther.mUnits[i])) {
return false;
}
}
return true;
}
void nsStyleSides::Reset()
{
memset(this, 0x00, sizeof(nsStyleSides));
}
nsStyleCorners::nsStyleCorners()
{
memset(this, 0x00, sizeof(nsStyleCorners));
}
bool
nsStyleCorners::operator==(const nsStyleCorners& aOther) const
{
NS_FOR_CSS_HALF_CORNERS(i) {
if (nsStyleCoord(mValues[i], (nsStyleUnit)mUnits[i]) !=
nsStyleCoord(aOther.mValues[i], (nsStyleUnit)aOther.mUnits[i])) {
return false;
}
}
return true;
}
void nsStyleCorners::Reset()
{
memset(this, 0x00, sizeof(nsStyleCorners));
}
// Validation of NS_SIDE_IS_VERTICAL and NS_HALF_CORNER_IS_X.
#define CASE(side, result) \
MOZ_STATIC_ASSERT(NS_SIDE_IS_VERTICAL(side) == result, \
"NS_SIDE_IS_VERTICAL is wrong")
CASE(NS_SIDE_TOP, false);
CASE(NS_SIDE_RIGHT, true);
CASE(NS_SIDE_BOTTOM, false);
CASE(NS_SIDE_LEFT, true);
#undef CASE
#define CASE(corner, result) \
MOZ_STATIC_ASSERT(NS_HALF_CORNER_IS_X(corner) == result, \
"NS_HALF_CORNER_IS_X is wrong")
CASE(NS_CORNER_TOP_LEFT_X, true);
CASE(NS_CORNER_TOP_LEFT_Y, false);
CASE(NS_CORNER_TOP_RIGHT_X, true);
CASE(NS_CORNER_TOP_RIGHT_Y, false);
CASE(NS_CORNER_BOTTOM_RIGHT_X, true);
CASE(NS_CORNER_BOTTOM_RIGHT_Y, false);
CASE(NS_CORNER_BOTTOM_LEFT_X, true);
CASE(NS_CORNER_BOTTOM_LEFT_Y, false);
#undef CASE
// Validation of NS_HALF_TO_FULL_CORNER.
#define CASE(corner, result) \
MOZ_STATIC_ASSERT(NS_HALF_TO_FULL_CORNER(corner) == result, \
"NS_HALF_TO_FULL_CORNER is wrong")
CASE(NS_CORNER_TOP_LEFT_X, NS_CORNER_TOP_LEFT);
CASE(NS_CORNER_TOP_LEFT_Y, NS_CORNER_TOP_LEFT);
CASE(NS_CORNER_TOP_RIGHT_X, NS_CORNER_TOP_RIGHT);
CASE(NS_CORNER_TOP_RIGHT_Y, NS_CORNER_TOP_RIGHT);
CASE(NS_CORNER_BOTTOM_RIGHT_X, NS_CORNER_BOTTOM_RIGHT);
CASE(NS_CORNER_BOTTOM_RIGHT_Y, NS_CORNER_BOTTOM_RIGHT);
CASE(NS_CORNER_BOTTOM_LEFT_X, NS_CORNER_BOTTOM_LEFT);
CASE(NS_CORNER_BOTTOM_LEFT_Y, NS_CORNER_BOTTOM_LEFT);
#undef CASE
// Validation of NS_FULL_TO_HALF_CORNER.
#define CASE(corner, vert, result) \
MOZ_STATIC_ASSERT(NS_FULL_TO_HALF_CORNER(corner, vert) == result, \
"NS_FULL_TO_HALF_CORNER is wrong")
CASE(NS_CORNER_TOP_LEFT, false, NS_CORNER_TOP_LEFT_X);
CASE(NS_CORNER_TOP_LEFT, true, NS_CORNER_TOP_LEFT_Y);
CASE(NS_CORNER_TOP_RIGHT, false, NS_CORNER_TOP_RIGHT_X);
CASE(NS_CORNER_TOP_RIGHT, true, NS_CORNER_TOP_RIGHT_Y);
CASE(NS_CORNER_BOTTOM_RIGHT, false, NS_CORNER_BOTTOM_RIGHT_X);
CASE(NS_CORNER_BOTTOM_RIGHT, true, NS_CORNER_BOTTOM_RIGHT_Y);
CASE(NS_CORNER_BOTTOM_LEFT, false, NS_CORNER_BOTTOM_LEFT_X);
CASE(NS_CORNER_BOTTOM_LEFT, true, NS_CORNER_BOTTOM_LEFT_Y);
#undef CASE
// Validation of NS_SIDE_TO_{FULL,HALF}_CORNER.
#define CASE(side, second, result) \
MOZ_STATIC_ASSERT(NS_SIDE_TO_FULL_CORNER(side, second) == result, \
"NS_SIDE_TO_FULL_CORNER is wrong")
CASE(NS_SIDE_TOP, false, NS_CORNER_TOP_LEFT);
CASE(NS_SIDE_TOP, true, NS_CORNER_TOP_RIGHT);
CASE(NS_SIDE_RIGHT, false, NS_CORNER_TOP_RIGHT);
CASE(NS_SIDE_RIGHT, true, NS_CORNER_BOTTOM_RIGHT);
CASE(NS_SIDE_BOTTOM, false, NS_CORNER_BOTTOM_RIGHT);
CASE(NS_SIDE_BOTTOM, true, NS_CORNER_BOTTOM_LEFT);
CASE(NS_SIDE_LEFT, false, NS_CORNER_BOTTOM_LEFT);
CASE(NS_SIDE_LEFT, true, NS_CORNER_TOP_LEFT);
#undef CASE
#define CASE(side, second, parallel, result) \
MOZ_STATIC_ASSERT(NS_SIDE_TO_HALF_CORNER(side, second, parallel) == result, \
"NS_SIDE_TO_HALF_CORNER is wrong")
CASE(NS_SIDE_TOP, false, true, NS_CORNER_TOP_LEFT_X);
CASE(NS_SIDE_TOP, false, false, NS_CORNER_TOP_LEFT_Y);
CASE(NS_SIDE_TOP, true, true, NS_CORNER_TOP_RIGHT_X);
CASE(NS_SIDE_TOP, true, false, NS_CORNER_TOP_RIGHT_Y);
CASE(NS_SIDE_RIGHT, false, false, NS_CORNER_TOP_RIGHT_X);
CASE(NS_SIDE_RIGHT, false, true, NS_CORNER_TOP_RIGHT_Y);
CASE(NS_SIDE_RIGHT, true, false, NS_CORNER_BOTTOM_RIGHT_X);
CASE(NS_SIDE_RIGHT, true, true, NS_CORNER_BOTTOM_RIGHT_Y);
CASE(NS_SIDE_BOTTOM, false, true, NS_CORNER_BOTTOM_RIGHT_X);
CASE(NS_SIDE_BOTTOM, false, false, NS_CORNER_BOTTOM_RIGHT_Y);
CASE(NS_SIDE_BOTTOM, true, true, NS_CORNER_BOTTOM_LEFT_X);
CASE(NS_SIDE_BOTTOM, true, false, NS_CORNER_BOTTOM_LEFT_Y);
CASE(NS_SIDE_LEFT, false, false, NS_CORNER_BOTTOM_LEFT_X);
CASE(NS_SIDE_LEFT, false, true, NS_CORNER_BOTTOM_LEFT_Y);
CASE(NS_SIDE_LEFT, true, false, NS_CORNER_TOP_LEFT_X);
CASE(NS_SIDE_LEFT, true, true, NS_CORNER_TOP_LEFT_Y);
#undef CASE
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