/**
* Converts a length from a CSS length or percentage to 'pt'.
*
* @param spec the CSS length specification
* @param whole the value that corresponds to 100%. It is used only when spec is a percentage.
* @return the length in 'pt'
*/
public double ptLength(TermLengthOrPercent spec, double whole) {
float nval = spec.getValue();
if (spec.isPercentage()) return (whole * nval) / 100;
else {
TermLength.Unit unit = spec.getUnit();
double ret = 0;
if (unit == TermLength.Unit.pt) {
ret = nval;
} else if (unit == TermLength.Unit.in) {
ret = nval * 72;
} else if (unit == TermLength.Unit.cm) {
ret = (nval * 72) / 2.54;
} else if (unit == TermLength.Unit.mm) {
ret = (nval * 72) / 25.4;
} else if (unit == TermLength.Unit.pc) {
ret = nval * 12;
} else if (unit == TermLength.Unit.px) {
ret = (nval * 72) / dpi;
} else if (unit == TermLength.Unit.em) {
ret = (em * nval * 72) / dpi; // em is in pixels
} else if (unit == TermLength.Unit.rem) {
ret = (rem * nval * 72) / dpi;
} else if (unit == TermLength.Unit.ex) {
ret = (ex * nval * 72) / dpi;
} else if (unit == TermLength.Unit.ch) {
ret = (ch * nval * 72) / dpi;
} else if (unit == TermLength.Unit.vw) {
return (viewport.getVisibleRect().getWidth() * nval * 72) / (100.0 * dpi);
} else if (unit == TermLength.Unit.vh) {
return (viewport.getVisibleRect().getHeight() * nval * 72) / (100.0 * dpi);
} else if (unit == TermLength.Unit.vmin) {
return (Math.min(
viewport.getVisibleRect().getWidth(), viewport.getVisibleRect().getHeight())
* nval
* 72)
/ (100.0 * dpi);
} else if (unit == TermLength.Unit.vmax) {
return (Math.max(
viewport.getVisibleRect().getWidth(), viewport.getVisibleRect().getHeight())
* nval
* 72)
/ (100.0 * dpi);
}
return ret;
}
}
