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;
}
}
