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 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);
}