internal bool ParseHSLColor(ref nscolor aColor,
char aStop)
{
float h = 0, s = 0, l = 0;
// Get the hue
if (!GetToken(true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorHueEOF"); };
return false;
}
if (mToken.mType != nsCSSTokenType.Number) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEExpectedNumber", mToken); };
UngetToken();
return false;
}
h = mToken.mNumber;
h /= 360.0f;
// hue values are wraparound
h = h - (float)Math.Floor(h);
if (!ExpectSymbol(',', true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEExpectedComma", mToken); };
return false;
}
// Get the saturation
if (!GetToken(true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorSaturationEOF"); };
return false;
}
if (mToken.mType != nsCSSTokenType.Percentage) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEExpectedPercent", mToken); };
UngetToken();
return false;
}
s = mToken.mNumber;
if (s < 0.0f) s = 0.0f;
if (s > 1.0f) s = 1.0f;
if (!ExpectSymbol(',', true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEExpectedComma", mToken); };
return false;
}
// Get the lightness
if (!GetToken(true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorLightnessEOF"); };
return false;
}
if (mToken.mType != nsCSSTokenType.Percentage) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEExpectedPercent", mToken); };
UngetToken();
return false;
}
l = mToken.mNumber;
if (l < 0.0f) l = 0.0f;
if (l > 1.0f) l = 1.0f;
if (ExpectSymbol(aStop, true)) {
aColor = nscolor.HSL2RGB(h, s, l);
return true;
}
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorComponentBadTerm", mToken, aStop); };
return false;
}
// The types to pass to ParseColorComponent. These correspond to the
// various datatypes that can go within rgb().
internal bool ParseColor(ref nsCSSValue aValue)
{
if (!GetToken(true)) {
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorEOF"); };
return false;
}
nsCSSToken tk = mToken;
var rgba = new nscolor();
switch (tk.mType) {
case nsCSSTokenType.ID:
case nsCSSTokenType.Hash:
// #xxyyzz
if (nscolor.HexToRGB(tk.mIdentStr, ref rgba)) {
aValue.SetColorValue(rgba);
return true;
}
break;
case nsCSSTokenType.Ident:
if (nscolor.ColorNameToRGB(tk.mIdentStr, ref rgba)) {
aValue.SetStringValue(tk.mIdentStr, nsCSSUnit.Ident);
return true;
}
else {
nsCSSKeyword keyword = nsCSSKeywords.LookupKeyword(tk.mIdentStr);
if (nsCSSKeyword.UNKNOWN < keyword) { // known keyword
int32_t value = 0;
if (nsCSSProps.FindKeyword(keyword, nsCSSProps.kColorKTable, ref value)) {
aValue.SetIntValue(value, nsCSSUnit.EnumColor);
return true;
}
}
}
break;
case nsCSSTokenType.Function:
if (mToken.mIdentStr.LowerCaseEqualsLiteral("rgb")) {
// rgb ( component , component , component )
uint8_t r = 0, g = 0, b = 0;
int32_t type = COLOR_TYPE_UNKNOWN;
if (ParseColorComponent(ref r, ref type, ',') &&
ParseColorComponent(ref g, ref type, ',') &&
ParseColorComponent(ref b, ref type, ')')) {
aValue.SetColorValue(nscolor.RGB(r,g,b));
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdentStr.LowerCaseEqualsLiteral("-moz-rgba") ||
mToken.mIdentStr.LowerCaseEqualsLiteral("rgba")) {
// rgba ( component , component , component , opacity )
uint8_t r = 0, g = 0, b = 0, a = 0;
int32_t type = COLOR_TYPE_UNKNOWN;
if (ParseColorComponent(ref r, ref type, ',') &&
ParseColorComponent(ref g, ref type, ',') &&
ParseColorComponent(ref b, ref type, ',') &&
ParseColorOpacity(ref a)) {
aValue.SetColorValue(nscolor.RGBA(r, g, b, a));
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdentStr.LowerCaseEqualsLiteral("hsl")) {
// hsl ( hue , saturation , lightness )
// "hue" is a number, "saturation" and "lightness" are percentages.
if (ParseHSLColor(ref rgba, ')')) {
aValue.SetColorValue(rgba);
return true;
}
SkipUntil(')');
return false;
}
else if (mToken.mIdentStr.LowerCaseEqualsLiteral("-moz-hsla") ||
mToken.mIdentStr.LowerCaseEqualsLiteral("hsla")) {
// hsla ( hue , saturation , lightness , opacity )
// "hue" is a number, "saturation" and "lightness" are percentages,
// "opacity" is a number.
uint8_t a = 0;
if (ParseHSLColor(ref rgba, ',') &&
ParseColorOpacity(ref a)) {
aValue.SetColorValue(nscolor.RGBA(rgba.R, rgba.G,
rgba.B, a));
return true;
}
SkipUntil(')');
return false;
}
break;
default:
break;
}
// try 'xxyyzz' without '#' prefix for compatibility with IE and Nav4x (bug 23236 and 45804)
// TODO support hashless colors
// It's not a color
{ if (!mSuppressErrors) mReporter.ReportUnexpected("PEColorNotColor", mToken); };
UngetToken();
return false;
}