protected CSSValue parseFirstPosition(final LexicalUnit value) {
if (value == null) {
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_IDENT) {
if ("left".equalsIgnoreCase(value.getStringValue())) {
return LEFT;
} else if ("center".equalsIgnoreCase(value.getStringValue())) {
return CENTER;
} else if ("right".equalsIgnoreCase(value.getStringValue())) {
return RIGHT;
} else if ("top".equalsIgnoreCase(value.getStringValue())) {
return TOP;
} else if ("bottom".equalsIgnoreCase(value.getStringValue())) {
return BOTTOM;
}
// ignore this rule.
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_PERCENTAGE) {
return CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, value.getFloatValue());
}
if (CSSValueFactory.isLengthValue(value)) {
return CSSValueFactory.createLengthValue(value);
}
// contains errors, we ignore this rule.
return null;
}
private float calculateInternal(
final LexicalUnit lu, final Styles parentStyles, final Styles styles) {
final DisplayDevice device = DisplayDevice.getCurrent();
float baseFontSize = DEFAULT_FONT_SIZE_POINTS * device.getVerticalPPI() / 72;
if (parentStyles != null) {
baseFontSize = parentStyles.getFontSize();
}
if (lu == null) {
return baseFontSize;
} else if (isLength(lu)) {
return getFloatLength(lu, baseFontSize, device.getVerticalPPI());
} else if (isPercentage(lu)) {
return baseFontSize * lu.getFloatValue() / 100;
} else if (lu.getLexicalUnitType() == LexicalUnit.SAC_IDENT) {
final String s = lu.getStringValue();
if (s.equals(CSS.XX_SMALL)) {
return baseFontSize * FONT_FACTOR_XX_SMALL;
} else if (s.equals(CSS.X_SMALL)) {
return baseFontSize * FONT_FACTOR_X_SMALL;
} else if (s.equals(CSS.SMALL)) {
return baseFontSize * FONT_FACTOR_SMALL;
} else if (s.equals(CSS.MEDIUM)) {
return baseFontSize * FONT_FACTOR_MEDIUM;
} else if (s.equals(CSS.LARGE)) {
return baseFontSize * FONT_FACTOR_LARGE;
} else if (s.equals(CSS.X_LARGE)) {
return baseFontSize * FONT_FACTOR_X_LARGE;
} else if (s.equals(CSS.XX_LARGE)) {
return baseFontSize * FONT_FACTOR_XX_LARGE;
} else if (s.equals(CSS.SMALLER)) {
return baseFontSize / FONT_SIZE_FACTOR;
} else if (s.equals(CSS.LARGER)) {
return baseFontSize * FONT_SIZE_FACTOR;
} else {
return baseFontSize;
}
} else {
return baseFontSize;
}
}
private CSSValue parseSingleSpacingValue(final LexicalUnit value) {
if (value == null) {
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_IDENT) {
if (value.getStringValue().equalsIgnoreCase("normal")) {
return SpacingLimitReadHandler.NORMAL;
}
return null;
}
if (value.getLexicalUnitType() == LexicalUnit.SAC_PERCENTAGE) {
return CSSNumericValue.createValue(CSSNumericType.PERCENTAGE, value.getFloatValue());
}
return CSSValueFactory.createLengthValue(value);
}
void write(LexicalUnit lu) {
short type = lu.getLexicalUnitType();
switch (type) {
case LexicalUnit.SAC_URI:
write("url(");
write(lu.getStringValue());
write(")");
break;
case LexicalUnit.SAC_STRING_VALUE:
write('"');
write(lu.getStringValue());
write('"');
break;
case LexicalUnit.SAC_IDENT:
write(lu.getStringValue());
break;
case LexicalUnit.SAC_REAL:
write(lu.getFloatValue());
break;
case LexicalUnit.SAC_PIXEL:
write(lu.getFloatValue());
write("px");
break;
case LexicalUnit.SAC_MILLIMETER:
write(lu.getFloatValue());
write("mm");
break;
case LexicalUnit.SAC_CENTIMETER:
write(lu.getFloatValue());
write("cm");
break;
case LexicalUnit.SAC_PERCENTAGE:
write(lu.getFloatValue());
write("%");
break;
case LexicalUnit.SAC_POINT:
write(lu.getFloatValue());
write("pt");
break;
case LexicalUnit.SAC_EM:
write(lu.getFloatValue());
write("em");
break;
case LexicalUnit.SAC_INTEGER:
write(lu.getIntegerValue());
break;
case LexicalUnit.SAC_FUNCTION:
write(lu.getFunctionName());
write("(");
write(lu.getParameters(), "");
write(")");
break;
case LexicalUnit.SAC_RGBCOLOR:
// Use hexadecimal notation instead
writeHex(lu.getParameters());
break;
case LexicalUnit.SAC_OPERATOR_COMMA:
write(",");
break;
case LexicalUnit.SAC_INHERIT:
write("inherit");
break;
default:
throw new UnsupportedOperationException("Lexical unit type " + type + " is not handled");
}
}