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Diffstat (limited to 'gnu/javax/swing/text/html/css/FontSize.java')
-rw-r--r-- | gnu/javax/swing/text/html/css/FontSize.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/gnu/javax/swing/text/html/css/FontSize.java b/gnu/javax/swing/text/html/css/FontSize.java new file mode 100644 index 000000000..19e1d701a --- /dev/null +++ b/gnu/javax/swing/text/html/css/FontSize.java @@ -0,0 +1,156 @@ +/* FontSize.java -- Converts CSS font size values into real values + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.javax.swing.text.html.css; + +/** + * Converts CSS font-size values into real (point) values. + * + * @author Roman Kennke (kennke@aicas.com) + */ +public class FontSize +{ + + /** + * The CSS value. + */ + private String value; + + /** + * The default size for 'medium' absolute size. The other absolute sizes + * are calculated from this. + */ + public static final int DEFAULT_FONT_SIZE = 12; + + /** + * The scaling factors relative to the medium size. Medium is at index 2. + */ + private static final double[] SCALE = {0.8, 0.9, 1.0, 1.2, 1.4, 1.6, 1.8 }; + + /** + * Creates a new FontSize for the specified value. + * + * @param val the value to convert + */ + public FontSize(String val) + { + value = val; + } + + /** + * Returns the converted real value in point. + * + * @return the converted real value in point + */ + public int getValue() + { + int intVal; + if (value.contains("pt")) + intVal = mapPoints(); + else if (value.contains("px")) + intVal = mapPixels(); + else + intVal = mapAbsolute(); + // FIXME: Allow relative font values, ('larger' and 'smaller'). This + // requires knowledge about the parent element's font size. + return intVal; + } + + /** + * Maps point values ('XXXpt'). + * + * @return the real font size + */ + private int mapPoints() + { + int end = value.indexOf("pt"); + String number = value.substring(0, end); + int intVal = Integer.parseInt(number); + return intVal; + } + + /** + * Maps pixel values ('XXXpx'). + * + * @return the real font size + */ + private int mapPixels() + { + int end = value.indexOf("pt"); + String number = value.substring(0, end); + int intVal = Integer.parseInt(number); + return intVal; + } + + /** + * Maps absolute font-size values. + * + * @return the real value + */ + private int mapAbsolute() + { + int index; + if (value.equals("xx-small") || value.equals("x-small")) + index = 0; + else if (value.equals("small")) + index = 1; + else if (value.equals("medium")) + index = 2; + else if (value.equals("large")) + index = 3; + else if (value.equals("x-large")) + index = 4; + else if (value.equals("xx-large")) + index = 5; + else + index = 2; + double scale = SCALE[index]; + // FIXME: Scale the real medium size of the document, rather than the + // constant here. + int intVal = (int) (scale * DEFAULT_FONT_SIZE); + return intVal; + } + + /** + * Returns the string representation. + */ + public String toString() + { + return value; + } +} |