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package javafx.css;

import javafx.scene.text.Font;

Represents a size specified in a particular unit, such as 14px or 0.2em.
Since:9
/** * Represents a size specified in a particular unit, such as 14px or 0.2em. * * @since 9 */
public enum SizeUnits { PERCENT(false) { @Override public String toString() { return "%"; } @Override public double points(double value, double multiplier, Font font_not_used) { return (value/100.0) * multiplier; } @Override public double pixels(double value, double multiplier, Font font_not_used) { return (value/100.0) * multiplier; } }, IN(true) { @Override public String toString() { return "in"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return value * POINTS_PER_INCH; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return value * DOTS_PER_INCH; } }, CM(true) { @Override public String toString() { return "cm"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return (value / CM_PER_INCH) * POINTS_PER_INCH; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return (value / CM_PER_INCH) * DOTS_PER_INCH; } }, MM(true) { @Override public String toString() { return "mm"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return (value / MM_PER_INCH) * POINTS_PER_INCH; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return (value / MM_PER_INCH) * DOTS_PER_INCH; } }, EM(false) { @Override public String toString() { return "em"; } @Override public double points(double value, double multiplier_not_used, Font font) { return round(value * pointSize(font)); } @Override public double pixels(double value, double multiplier_not_used, Font font) { return round(value * pixelSize(font)); } }, EX(false) { @Override public String toString() { return "ex"; } // In the absence of font metrics, one ex is taken to be half an em @Override public double points(double value, double multiplier_not_used, Font font) { return round(value / 2.0 * pointSize(font)); } // In the absence of font metrics, one ex is taken to be half an em @Override public double pixels(double value, double multiplier_not_used, Font font) { return round(value / 2.0 * pixelSize(font)); } }, PT(true) { @Override public String toString() { return "pt"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return value; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return value * (DOTS_PER_INCH / POINTS_PER_INCH); } }, PC(true) { @Override public String toString() { return "pc"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return value * POINTS_PER_PICA; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return (value * POINTS_PER_PICA) * (DOTS_PER_INCH / POINTS_PER_INCH); } }, PX(true) { @Override public String toString() { return "px"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return value * (POINTS_PER_INCH / DOTS_PER_INCH); } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return value; } }, DEG(true) { @Override public String toString() { return "deg"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return round(value); } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return round(value); } }, GRAD(true) { @Override public String toString() { return "grad"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { // convert to degrees - 360deg = 400grad return round(value*9/10); } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { // convert to degrees - 360deg = 400grad return round(value*9/10); } }, RAD(true) { @Override public String toString() { return "rad"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { // convert to degrees - 360deg = 2pi rad return round(value*180/Math.PI); } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { // convert to degrees - 360deg = 2pi rad return round(value*180/Math.PI); } }, TURN(true) { @Override public String toString() { return "turn"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { // convert to degrees - 360deg = 1 turn return round(value*360); } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return round(value*360); } }, S(true) { @Override public String toString() { return "s"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return value; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return value; } }, MS(true) { @Override public String toString() { return "ms"; } @Override public double points(double value, double multiplier_not_used, Font font_not_used) { return value; } @Override public double pixels(double value, double multiplier_not_used, Font font_not_used) { return value; } }; public abstract double points(double value, double multiplier, Font font); public abstract double pixels(double value, double multiplier, Font font); private SizeUnits(boolean absolute) { this.absolute = absolute; } private final boolean absolute; public boolean isAbsolute() { return absolute; } // RT-14711: The spec says 1px is equal to 0.75pt // 72 / 0.75 = 96 static final private double DOTS_PER_INCH = 96.0; static final private double POINTS_PER_INCH = 72.0; static final private double CM_PER_INCH = 2.54; static final private double MM_PER_INCH = CM_PER_INCH * 10; static final private double POINTS_PER_PICA = 12.0; /* Get the font size in points */ private static double pointSize(Font font) { return pixelSize(font) * (POINTS_PER_INCH/DOTS_PER_INCH); } /* Get the font size in pixels to points */ private static double pixelSize(Font font) { return (font != null) ? font.getSize() : Font.getDefault().getSize(); } /* round to nearest 10th */ private static double round(double d) { if (d == 0) return d; final double r = (d < 0) ? -0.05 : 0.05; return ((long)((d + r) * 10)) / 10.0; } }