зеркало из https://github.com/mozilla/gecko-dev.git
424 строки
11 KiB
C++
424 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* representation of length values in computed style data */
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#include "nsStyleCoord.h"
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#include "mozilla/HashFunctions.h"
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#include "mozilla/PodOperations.h"
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using namespace mozilla;
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nsStyleCoord::nsStyleCoord(nsStyleUnit aUnit)
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: mUnit(aUnit)
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{
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NS_ASSERTION(aUnit < eStyleUnit_Percent, "not a valueless unit");
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if (aUnit >= eStyleUnit_Percent) {
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mUnit = eStyleUnit_Null;
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}
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mValue.mInt = 0;
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}
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nsStyleCoord::nsStyleCoord(int32_t aValue, nsStyleUnit aUnit)
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: mUnit(aUnit)
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{
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//if you want to pass in eStyleUnit_Coord, don't. instead, use the
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//constructor just above this one... MMP
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NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
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(aUnit == eStyleUnit_Integer), "not an int value");
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if ((aUnit == eStyleUnit_Enumerated) ||
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(aUnit == eStyleUnit_Integer)) {
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mValue.mInt = aValue;
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}
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else {
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mUnit = eStyleUnit_Null;
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mValue.mInt = 0;
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}
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}
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nsStyleCoord::nsStyleCoord(float aValue, nsStyleUnit aUnit)
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: mUnit(aUnit)
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{
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if (aUnit < eStyleUnit_Percent || aUnit >= eStyleUnit_Coord) {
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NS_NOTREACHED("not a float value");
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mUnit = eStyleUnit_Null;
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mValue.mInt = 0;
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} else {
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mValue.mFloat = aValue;
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}
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}
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bool nsStyleCoord::operator==(const nsStyleCoord& aOther) const
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{
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if (mUnit != aOther.mUnit) {
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return false;
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}
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switch (mUnit) {
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case eStyleUnit_Null:
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case eStyleUnit_Normal:
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case eStyleUnit_Auto:
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case eStyleUnit_None:
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return true;
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case eStyleUnit_Percent:
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case eStyleUnit_Factor:
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case eStyleUnit_Degree:
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case eStyleUnit_Grad:
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case eStyleUnit_Radian:
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case eStyleUnit_Turn:
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case eStyleUnit_FlexFraction:
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return mValue.mFloat == aOther.mValue.mFloat;
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case eStyleUnit_Coord:
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case eStyleUnit_Integer:
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case eStyleUnit_Enumerated:
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return mValue.mInt == aOther.mValue.mInt;
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case eStyleUnit_Calc:
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return *this->GetCalcValue() == *aOther.GetCalcValue();
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}
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MOZ_ASSERT(false, "unexpected unit");
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return false;
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}
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uint32_t nsStyleCoord::HashValue(uint32_t aHash = 0) const
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{
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aHash = mozilla::AddToHash(aHash, mUnit);
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switch (mUnit) {
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case eStyleUnit_Null:
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case eStyleUnit_Normal:
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case eStyleUnit_Auto:
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case eStyleUnit_None:
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return mozilla::AddToHash(aHash, true);
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case eStyleUnit_Percent:
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case eStyleUnit_Factor:
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case eStyleUnit_Degree:
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case eStyleUnit_Grad:
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case eStyleUnit_Radian:
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case eStyleUnit_Turn:
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case eStyleUnit_FlexFraction:
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return mozilla::AddToHash(aHash, mValue.mFloat);
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case eStyleUnit_Coord:
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case eStyleUnit_Integer:
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case eStyleUnit_Enumerated:
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return mozilla::AddToHash(aHash, mValue.mInt);
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case eStyleUnit_Calc:
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Calc* calcValue = GetCalcValue();
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aHash = mozilla::AddToHash(aHash, calcValue->mLength);
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if (HasPercent()) {
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return mozilla::AddToHash(aHash, calcValue->mPercent);
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}
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return aHash;
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}
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MOZ_ASSERT(false, "unexpected unit");
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return aHash;
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}
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void nsStyleCoord::Reset()
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{
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Reset(mUnit, mValue);
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}
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void nsStyleCoord::SetCoordValue(nscoord aValue)
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{
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Reset();
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mUnit = eStyleUnit_Coord;
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mValue.mInt = aValue;
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}
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void nsStyleCoord::SetIntValue(int32_t aValue, nsStyleUnit aUnit)
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{
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NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
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(aUnit == eStyleUnit_Integer), "not an int value");
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Reset();
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if ((aUnit == eStyleUnit_Enumerated) ||
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(aUnit == eStyleUnit_Integer)) {
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mUnit = aUnit;
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mValue.mInt = aValue;
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}
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}
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void nsStyleCoord::SetPercentValue(float aValue)
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{
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Reset();
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mUnit = eStyleUnit_Percent;
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mValue.mFloat = aValue;
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}
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void nsStyleCoord::SetFactorValue(float aValue)
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{
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Reset();
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mUnit = eStyleUnit_Factor;
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mValue.mFloat = aValue;
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}
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void nsStyleCoord::SetAngleValue(float aValue, nsStyleUnit aUnit)
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{
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Reset();
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if (aUnit == eStyleUnit_Degree ||
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aUnit == eStyleUnit_Grad ||
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aUnit == eStyleUnit_Radian ||
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aUnit == eStyleUnit_Turn) {
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mUnit = aUnit;
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mValue.mFloat = aValue;
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} else {
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NS_NOTREACHED("not an angle value");
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}
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}
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void nsStyleCoord::SetFlexFractionValue(float aValue)
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{
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Reset();
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mUnit = eStyleUnit_FlexFraction;
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mValue.mFloat = aValue;
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}
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void nsStyleCoord::SetCalcValue(Calc* aValue)
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{
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Reset();
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mUnit = eStyleUnit_Calc;
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mValue.mPointer = aValue;
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aValue->AddRef();
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}
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void nsStyleCoord::SetNormalValue()
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{
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Reset();
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mUnit = eStyleUnit_Normal;
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mValue.mInt = 0;
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}
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void nsStyleCoord::SetAutoValue()
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{
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Reset();
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mUnit = eStyleUnit_Auto;
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mValue.mInt = 0;
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}
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void nsStyleCoord::SetNoneValue()
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{
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Reset();
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mUnit = eStyleUnit_None;
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mValue.mInt = 0;
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}
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// accessors that are not inlined
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double
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nsStyleCoord::GetAngleValueInDegrees() const
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{
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return GetAngleValueInRadians() * (180.0 / M_PI);
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}
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double
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nsStyleCoord::GetAngleValueInRadians() const
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{
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double angle = mValue.mFloat;
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switch (GetUnit()) {
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case eStyleUnit_Radian: return angle;
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case eStyleUnit_Turn: return angle * 2 * M_PI;
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case eStyleUnit_Degree: return angle * M_PI / 180.0;
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case eStyleUnit_Grad: return angle * M_PI / 200.0;
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default:
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NS_NOTREACHED("unrecognized angular unit");
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return 0.0;
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}
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}
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nsStyleSides::nsStyleSides()
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{
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NS_FOR_CSS_SIDES(i) {
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mUnits[i] = eStyleUnit_Null;
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}
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mozilla::PodArrayZero(mValues);
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}
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nsStyleSides::nsStyleSides(const nsStyleSides& aOther)
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{
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NS_FOR_CSS_SIDES(i) {
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mUnits[i] = eStyleUnit_Null;
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}
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*this = aOther;
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}
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nsStyleSides::~nsStyleSides()
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{
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Reset();
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}
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nsStyleSides&
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nsStyleSides::operator=(const nsStyleSides& aCopy)
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{
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if (this != &aCopy) {
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NS_FOR_CSS_SIDES(i) {
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nsStyleCoord::SetValue(mUnits[i], mValues[i],
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aCopy.mUnits[i], aCopy.mValues[i]);
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}
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}
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return *this;
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}
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bool nsStyleSides::operator==(const nsStyleSides& aOther) const
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{
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NS_FOR_CSS_SIDES(i) {
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if (nsStyleCoord(mValues[i], (nsStyleUnit)mUnits[i]) !=
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nsStyleCoord(aOther.mValues[i], (nsStyleUnit)aOther.mUnits[i])) {
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return false;
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}
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}
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return true;
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}
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void nsStyleSides::Reset()
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{
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NS_FOR_CSS_SIDES(i) {
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nsStyleCoord::Reset(mUnits[i], mValues[i]);
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}
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}
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nsStyleCorners::nsStyleCorners()
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{
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NS_FOR_CSS_HALF_CORNERS(i) {
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mUnits[i] = eStyleUnit_Null;
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}
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mozilla::PodArrayZero(mValues);
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}
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nsStyleCorners::nsStyleCorners(const nsStyleCorners& aOther)
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{
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NS_FOR_CSS_HALF_CORNERS(i) {
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mUnits[i] = eStyleUnit_Null;
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}
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*this = aOther;
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}
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nsStyleCorners::~nsStyleCorners()
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{
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Reset();
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}
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nsStyleCorners&
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nsStyleCorners::operator=(const nsStyleCorners& aCopy)
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{
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if (this != &aCopy) {
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NS_FOR_CSS_HALF_CORNERS(i) {
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nsStyleCoord::SetValue(mUnits[i], mValues[i],
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aCopy.mUnits[i], aCopy.mValues[i]);
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}
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}
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return *this;
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}
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bool
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nsStyleCorners::operator==(const nsStyleCorners& aOther) const
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{
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NS_FOR_CSS_HALF_CORNERS(i) {
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if (nsStyleCoord(mValues[i], (nsStyleUnit)mUnits[i]) !=
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nsStyleCoord(aOther.mValues[i], (nsStyleUnit)aOther.mUnits[i])) {
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return false;
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}
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}
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return true;
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}
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void nsStyleCorners::Reset()
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{
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NS_FOR_CSS_HALF_CORNERS(i) {
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nsStyleCoord::Reset(mUnits[i], mValues[i]);
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}
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}
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// Validation of NS_SIDE_IS_VERTICAL and NS_HALF_CORNER_IS_X.
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#define CASE(side, result) \
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static_assert(NS_SIDE_IS_VERTICAL(side) == result, \
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"NS_SIDE_IS_VERTICAL is wrong")
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CASE(eSideTop, false);
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CASE(eSideRight, true);
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CASE(eSideBottom, false);
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CASE(eSideLeft, true);
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#undef CASE
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#define CASE(corner, result) \
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static_assert(NS_HALF_CORNER_IS_X(corner) == result, \
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"NS_HALF_CORNER_IS_X is wrong")
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CASE(NS_CORNER_TOP_LEFT_X, true);
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CASE(NS_CORNER_TOP_LEFT_Y, false);
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CASE(NS_CORNER_TOP_RIGHT_X, true);
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CASE(NS_CORNER_TOP_RIGHT_Y, false);
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CASE(NS_CORNER_BOTTOM_RIGHT_X, true);
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CASE(NS_CORNER_BOTTOM_RIGHT_Y, false);
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CASE(NS_CORNER_BOTTOM_LEFT_X, true);
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CASE(NS_CORNER_BOTTOM_LEFT_Y, false);
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#undef CASE
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// Validation of NS_HALF_TO_FULL_CORNER.
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#define CASE(corner, result) \
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static_assert(NS_HALF_TO_FULL_CORNER(corner) == result, \
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"NS_HALF_TO_FULL_CORNER is wrong")
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CASE(NS_CORNER_TOP_LEFT_X, NS_CORNER_TOP_LEFT);
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CASE(NS_CORNER_TOP_LEFT_Y, NS_CORNER_TOP_LEFT);
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CASE(NS_CORNER_TOP_RIGHT_X, NS_CORNER_TOP_RIGHT);
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CASE(NS_CORNER_TOP_RIGHT_Y, NS_CORNER_TOP_RIGHT);
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CASE(NS_CORNER_BOTTOM_RIGHT_X, NS_CORNER_BOTTOM_RIGHT);
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CASE(NS_CORNER_BOTTOM_RIGHT_Y, NS_CORNER_BOTTOM_RIGHT);
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CASE(NS_CORNER_BOTTOM_LEFT_X, NS_CORNER_BOTTOM_LEFT);
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CASE(NS_CORNER_BOTTOM_LEFT_Y, NS_CORNER_BOTTOM_LEFT);
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#undef CASE
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// Validation of NS_FULL_TO_HALF_CORNER.
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#define CASE(corner, vert, result) \
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static_assert(NS_FULL_TO_HALF_CORNER(corner, vert) == result, \
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"NS_FULL_TO_HALF_CORNER is wrong")
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CASE(NS_CORNER_TOP_LEFT, false, NS_CORNER_TOP_LEFT_X);
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CASE(NS_CORNER_TOP_LEFT, true, NS_CORNER_TOP_LEFT_Y);
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CASE(NS_CORNER_TOP_RIGHT, false, NS_CORNER_TOP_RIGHT_X);
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CASE(NS_CORNER_TOP_RIGHT, true, NS_CORNER_TOP_RIGHT_Y);
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CASE(NS_CORNER_BOTTOM_RIGHT, false, NS_CORNER_BOTTOM_RIGHT_X);
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CASE(NS_CORNER_BOTTOM_RIGHT, true, NS_CORNER_BOTTOM_RIGHT_Y);
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CASE(NS_CORNER_BOTTOM_LEFT, false, NS_CORNER_BOTTOM_LEFT_X);
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CASE(NS_CORNER_BOTTOM_LEFT, true, NS_CORNER_BOTTOM_LEFT_Y);
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#undef CASE
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// Validation of NS_SIDE_TO_{FULL,HALF}_CORNER.
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#define CASE(side, second, result) \
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static_assert(NS_SIDE_TO_FULL_CORNER(side, second) == result, \
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"NS_SIDE_TO_FULL_CORNER is wrong")
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CASE(eSideTop, false, NS_CORNER_TOP_LEFT);
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CASE(eSideTop, true, NS_CORNER_TOP_RIGHT);
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CASE(eSideRight, false, NS_CORNER_TOP_RIGHT);
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CASE(eSideRight, true, NS_CORNER_BOTTOM_RIGHT);
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CASE(eSideBottom, false, NS_CORNER_BOTTOM_RIGHT);
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CASE(eSideBottom, true, NS_CORNER_BOTTOM_LEFT);
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CASE(eSideLeft, false, NS_CORNER_BOTTOM_LEFT);
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CASE(eSideLeft, true, NS_CORNER_TOP_LEFT);
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#undef CASE
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#define CASE(side, second, parallel, result) \
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static_assert(NS_SIDE_TO_HALF_CORNER(side, second, parallel) == result, \
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"NS_SIDE_TO_HALF_CORNER is wrong")
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CASE(eSideTop, false, true, NS_CORNER_TOP_LEFT_X);
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CASE(eSideTop, false, false, NS_CORNER_TOP_LEFT_Y);
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CASE(eSideTop, true, true, NS_CORNER_TOP_RIGHT_X);
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CASE(eSideTop, true, false, NS_CORNER_TOP_RIGHT_Y);
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CASE(eSideRight, false, false, NS_CORNER_TOP_RIGHT_X);
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CASE(eSideRight, false, true, NS_CORNER_TOP_RIGHT_Y);
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CASE(eSideRight, true, false, NS_CORNER_BOTTOM_RIGHT_X);
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CASE(eSideRight, true, true, NS_CORNER_BOTTOM_RIGHT_Y);
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CASE(eSideBottom, false, true, NS_CORNER_BOTTOM_RIGHT_X);
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CASE(eSideBottom, false, false, NS_CORNER_BOTTOM_RIGHT_Y);
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CASE(eSideBottom, true, true, NS_CORNER_BOTTOM_LEFT_X);
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CASE(eSideBottom, true, false, NS_CORNER_BOTTOM_LEFT_Y);
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CASE(eSideLeft, false, false, NS_CORNER_BOTTOM_LEFT_X);
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CASE(eSideLeft, false, true, NS_CORNER_BOTTOM_LEFT_Y);
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CASE(eSideLeft, true, false, NS_CORNER_TOP_LEFT_X);
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CASE(eSideLeft, true, true, NS_CORNER_TOP_LEFT_Y);
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#undef CASE
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