001/* =================================================== 002 * JFreeSVG : an SVG library for the Java(tm) platform 003 * =================================================== 004 * 005 * (C)opyright 2013-2021, by Object Refinery Limited. All rights reserved. 006 * 007 * Project Info: http://www.jfree.org/jfreesvg/index.html 008 * 009 * This program is free software: you can redistribute it and/or modify 010 * it under the terms of the GNU General Public License as published by 011 * the Free Software Foundation, either version 3 of the License, or 012 * (at your option) any later version. 013 * 014 * This program is distributed in the hope that it will be useful, 015 * but WITHOUT ANY WARRANTY; without even the implied warranty of 016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 017 * GNU General Public License for more details. 018 * 019 * You should have received a copy of the GNU General Public License 020 * along with this program. If not, see <http://www.gnu.org/licenses/>. 021 * 022 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 023 * Other names may be trademarks of their respective owners.] 024 * 025 * If you do not wish to be bound by the terms of the GPL, an alternative 026 * commercial license can be purchased. For details, please see visit the 027 * JFreeSVG home page: 028 * 029 * http://www.jfree.org/jfreesvg 030 * 031 */ 032 033package org.jfree.svg; 034 035import java.awt.Font; 036import java.util.HashMap; 037import java.util.Map; 038import java.util.function.Function; 039import org.jfree.svg.util.Args; 040 041/** 042 * The standard function used in JFreeSVG to create font references for the 043 * SVG output. This implementation will substitute SVG generic font names 044 * for the Java logical fonts. Methods are provided for adding more font 045 * substitutions if you require them. This function will also surround the 046 * font name with single-quotes, which addresses issue #27. 047 * 048 * @since 5.0 049 */ 050public class StandardFontFunction implements Function<String, String> { 051 052 /** A map of substitute font family names. */ 053 private final Map<String, String> alternates; 054 055 /** 056 * Creates a new instance with mappings for the Java logical fonts. 057 */ 058 public StandardFontFunction() { 059 this.alternates = new HashMap<>(); 060 this.alternates.put(Font.DIALOG, "sans-serif"); 061 this.alternates.put(Font.DIALOG_INPUT, "monospace"); 062 this.alternates.put(Font.SANS_SERIF, "sans-serif"); 063 this.alternates.put(Font.SERIF, "serif"); 064 this.alternates.put(Font.MONOSPACED, "monospace"); 065 } 066 067 /** 068 * Returns the (substitute) SVG font family name for the specified Java font 069 * family name, or {@code null} if there is no substitute. 070 * 071 * @param family the Java font family name ({@code null} not permitted). 072 * 073 * @return The substitute SVG font family name, or {@code null}. 074 */ 075 public String get(String family) { 076 Args.nullNotPermitted(family, "family"); 077 return this.alternates.get(family); 078 } 079 080 /** 081 * Adds a substitute font family name (to be used in the SVG output) for 082 * the given Java font family name. If the specified alternate is 083 * {@code null} it has the effect of clearing any existing substitution. 084 * 085 * @param family the Java font family name ({@code null} not permitted). 086 * @param substitute the font family name to substitute in the SVG 087 * output ({@code null} permitted). 088 */ 089 public void put(String family, String substitute) { 090 Args.nullNotPermitted(family, "family"); 091 this.alternates.put(family, substitute); 092 } 093 094 /** 095 * Returns the SVG font reference for the supplied (Java) font family 096 * name. This implementation provides substitute names for the Java 097 * logical fonts. Other Java font family names are not changed, but all 098 * font family names are surrounded in single quotes for the SVG output. 099 * 100 * @param family the font family name ({@code null} not permitted). 101 * 102 * @return The SVG font reference (never {@code null}). 103 */ 104 @Override 105 public String apply(String family) { 106 Args.nullNotPermitted(family, "family"); 107 String alternate = this.alternates.get(family); 108 if (alternate == null) { 109 alternate = "\"" + family + "\""; 110 } 111 return alternate; 112 } 113 114}