private static void CompileBoxArea(StylePropertyReader reader, out Length top, out Length right, out Length bottom, out Length left)
{
top = 0f;
right = 0f;
bottom = 0f;
left = 0f;
var valueCount = reader.valueCount;
switch (valueCount)
{
// apply to all four sides
case 0:
break;
case 1:
{
top = right = bottom = left = reader.ReadLength(0);
break;
}
// vertical | horizontal
case 2:
{
top = bottom = reader.ReadLength(0);
left = right = reader.ReadLength(1);
break;
}
// top | horizontal | bottom
case 3:
{
top = reader.ReadLength(0);
left = right = reader.ReadLength(1);
bottom = reader.ReadLength(2);
break;
}
// top | right | bottom | left
default:
{
top = reader.ReadLength(0);
right = reader.ReadLength(1);
bottom = reader.ReadLength(2);
left = reader.ReadLength(3);
break;
}
}
}
private static bool CompileFlexShorthand(StylePropertyReader reader, out float grow, out float shrink, out Length basis)
{
grow = 0f;
shrink = 1f;
basis = Length.Auto();
bool valid = false;
var valueCount = reader.valueCount;
if (valueCount == 1 && reader.IsValueType(0, StyleValueType.Keyword))
{
// Handle none | auto
if (reader.IsKeyword(0, StyleValueKeyword.None))
{
valid = true;
grow = 0f;
shrink = 0f;
basis = Length.Auto();
}
else if (reader.IsKeyword(0, StyleValueKeyword.Auto))
{
valid = true;
grow = 1f;
shrink = 1f;
basis = Length.Auto();
}
}
else if (valueCount <= 3)
{
// Handle [ <'flex-grow'> <'flex-shrink'>? || <'flex-basis'> ]
valid = true;
grow = 0f;
shrink = 1f;
basis = Length.Percent(0);
bool growFound = false;
bool basisFound = false;
for (int i = 0; i < valueCount && valid; i++)
{
var valueType = reader.GetValueType(i);
if (valueType == StyleValueType.Dimension || valueType == StyleValueType.Keyword)
{
// Basis
if (basisFound)
{
valid = false;
break;
}
basisFound = true;
if (valueType == StyleValueType.Keyword)
{
if (reader.IsKeyword(i, StyleValueKeyword.Auto))
{
basis = Length.Auto();
}
}
else if (valueType == StyleValueType.Dimension)
{
basis = reader.ReadLength(i);
}
if (growFound && i != valueCount - 1)
{
// If grow is already processed basis must be the last value
valid = false;
}
}
else if (valueType == StyleValueType.Float)
{
var value = reader.ReadFloat(i);
if (!growFound)
{
growFound = true;
grow = value;
}
else
{
shrink = value;
}
}
else
{
valid = false;
}
}
}
return(valid);
}
