82 lines
2.7 KiB
Java
82 lines
2.7 KiB
Java
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package org.apache.poi.hssf.usermodel;
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import java.util.*;
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import java.awt.*;
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import java.io.*;
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/**
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* Allows the user to lookup the font metrics for a particular font without
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* actually having the font on the system. The font details are loaded
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* as a resource from the POI jar file (or classpath) and should be contained
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* in path "/font_metrics.properties". The font widths are for a 10 point
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* version of the font. Use a multiplier for other sizes.
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*
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* @author Glen Stampoultzis (glens at apache.org)
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*/
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class StaticFontMetrics
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{
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private static Properties fontMetricsProps;
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private static Map fontDetailsMap = new HashMap();
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/**
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* Retrieves the fake font details for a given font.
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* @param font the font to lookup.
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* @return the fake font.
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*/
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public static FontDetails getFontDetails(Font font)
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{
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if (fontMetricsProps == null)
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{
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InputStream metricsIn = null;
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try
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{
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fontMetricsProps = new Properties();
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if (System.getProperty("font.metrics.filename") != null)
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{
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String filename = System.getProperty("font.metrics.filename");
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File file = new File(filename);
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if (!file.exists())
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throw new FileNotFoundException("font_metrics.properties not found at path " + file.getAbsolutePath());
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metricsIn = new FileInputStream(file);
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}
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else
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{
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metricsIn = FontDetails.class.getResourceAsStream("/font_metrics.properties");
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if (metricsIn == null)
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throw new FileNotFoundException("font_metrics.properties not found in classpath");
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}
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fontMetricsProps.load(metricsIn);
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}
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catch ( IOException e )
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{
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throw new RuntimeException("Could not load font metrics: " + e.getMessage());
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}
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finally
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{
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if (metricsIn != null)
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{
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try
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{
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metricsIn.close();
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}
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catch ( IOException ignore ) { }
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}
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}
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}
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String fontName = font.getName();
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if (fontDetailsMap.get(fontName) == null)
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{
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FontDetails fontDetails = FontDetails.create(fontName, fontMetricsProps);
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fontDetailsMap.put( fontName, fontDetails );
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return fontDetails;
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}
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else
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{
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return (FontDetails) fontDetailsMap.get(fontName);
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}
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}
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}
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