internal bool ParseSize()
{
nsCSSValue width = new nsCSSValue(), height = new nsCSSValue();
if (!ParseVariant(ref width, VARIANT_AHKL, nsCSSProps.kPageSizeKTable)) {
return false;
}
if (width.IsLengthUnit()) {
ParseVariant(ref height, VARIANT_LENGTH, null);
}
if (!ExpectEndProperty()) {
return false;
}
if (width == height || height.GetUnit() == nsCSSUnit.Null) {
AppendValue(nsCSSProperty.Size, width);
} else {
var pair = new nsCSSValue();
pair.SetPairValue(width, height);
AppendValue(nsCSSProperty.Size, pair);
}
return true;
}
// Note that this does include VARIANT_CALC, which is numeric. This is
// because calc() parsing, as proposed, drops range restrictions inside
// the calc() expression and clamps the result of the calculation to the
// range.
// Note that callers passing VARIANT_CALC in aVariantMask will get
// full-range parsing inside the calc() expression, and the code that
// computes the calc will be required to clamp the resulting value to an
// appropriate range.
internal bool ParseNonNegativeVariant(ref nsCSSValue aValue,
int32_t aVariantMask,
int32_t[] aKeywordTable)
{
// The variant mask must only contain non-numeric variants or the ones
// that we specifically handle.
Debug.Assert((aVariantMask & ~(VARIANT_ALL_NONNUMERIC |
VARIANT_NUMBER |
VARIANT_LENGTH |
VARIANT_PERCENT |
VARIANT_INTEGER)) == 0,
"need to update code below to handle additional variants");
if (ParseVariant(ref aValue, aVariantMask, aKeywordTable)) {
if (nsCSSUnit.Number == aValue.GetUnit() ||
aValue.IsLengthUnit()){
if (aValue.GetFloatValue() < 0) {
UngetToken();
return false;
}
}
else if (aValue.GetUnit() == nsCSSUnit.Percent) {
if (aValue.GetPercentValue() < 0) {
UngetToken();
return false;
}
} else if (aValue.GetUnit() == nsCSSUnit.Integer) {
if (aValue.GetIntValue() < 0) {
UngetToken();
return false;
}
}
return true;
}
return false;
}
internal bool ParseShadowItem(ref nsCSSValue aValue, bool aIsBoxShadow)
{
// A shadow list item is an array, with entries in this sequence:
const int IndexX = 0;
const int IndexY = 1;
const int IndexRadius = 2;
const int IndexSpread = 3;
const int IndexColor = 4;
const int IndexInset = 5;
nsCSSValue[] val = new nsCSSValue[6];
if (aIsBoxShadow) {
// Optional inset keyword (ignore errors)
ParseVariant(ref val[IndexInset], VARIANT_KEYWORD,
nsCSSProps.kBoxShadowTypeKTable);
}
var xOrColor = new nsCSSValue();
bool haveColor = false;
if (!ParseVariant(ref xOrColor, VARIANT_COLOR | VARIANT_LENGTH | VARIANT_CALC,
null)) {
return false;
}
if (xOrColor.IsLengthUnit() || xOrColor.IsCalcUnit()) {
val[IndexX] = xOrColor;
} else {
// Must be a color (as string or color value)
Debug.Assert(xOrColor.GetUnit() == nsCSSUnit.Ident ||
xOrColor.GetUnit() == nsCSSUnit.Color ||
xOrColor.GetUnit() == nsCSSUnit.EnumColor,
"Must be a color value");
val[IndexColor] = xOrColor;
haveColor = true;
// X coordinate mandatory after color
if (!ParseVariant(ref val[IndexX], VARIANT_LENGTH | VARIANT_CALC,
null)) {
return false;
}
}
// Y coordinate; mandatory
if (!ParseVariant(ref val[IndexY], VARIANT_LENGTH | VARIANT_CALC,
null)) {
return false;
}
// Optional radius. Ignore errors except if they pass a negative
// value which we must reject. If we use ParseNonNegativeVariant
// we can't tell the difference between an unspecified radius
// and a negative radius.
if (ParseVariant(ref val[IndexRadius], VARIANT_LENGTH | VARIANT_CALC,
null) &&
val[IndexRadius].IsLengthUnit() &&
val[IndexRadius].GetFloatValue() < 0) {
return false;
}
if (aIsBoxShadow) {
// Optional spread
ParseVariant(ref val[IndexSpread], VARIANT_LENGTH | VARIANT_CALC, null);
}
if (!haveColor) {
// Optional color
ParseVariant(ref val[IndexColor], VARIANT_COLOR, null);
}
if (aIsBoxShadow && val[IndexInset].GetUnit() == nsCSSUnit.Null) {
// Optional inset keyword
ParseVariant(ref val[IndexInset], VARIANT_KEYWORD,
nsCSSProps.kBoxShadowTypeKTable);
}
aValue.SetArrayValue(val, nsCSSUnit.Array);
return true;
}
internal bool ParseBorderSpacing()
{
nsCSSValue xValue = new nsCSSValue(), yValue = new nsCSSValue();
if (!ParseNonNegativeVariant(ref xValue, VARIANT_HL | VARIANT_CALC, null)) {
return false;
}
// If we have one length, get the optional second length.
// set the second value equal to the first.
if (xValue.IsLengthUnit() || xValue.IsCalcUnit()) {
ParseNonNegativeVariant(ref yValue, VARIANT_LENGTH | VARIANT_CALC, null);
}
if (!ExpectEndProperty()) {
return false;
}
if (yValue == xValue || yValue.GetUnit() == nsCSSUnit.Null) {
AppendValue(nsCSSProperty.BorderSpacing, xValue);
} else {
var pair = new nsCSSValue();
pair.SetPairValue(xValue, yValue);
AppendValue(nsCSSProperty.BorderSpacing, pair);
}
return true;
}
