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