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This is a backport of OpenJFX 8 to run on Java 7.
The newest version!
/*
* Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.javafx.css;
import javafx.scene.text.Font;
/**
* Represents a size specified in a particular unit, such as 14px or 0.2em.
*/
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);
}
};
abstract double points(double value, double multiplier, Font font);
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;
}
}