[1097] | 1 | package org.expeditee.gio.swing;
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| 2 |
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| 3 | import java.awt.GraphicsEnvironment;
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| 4 | import java.io.File;
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| 5 | import java.util.HashMap;
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| 6 | import java.util.HashSet;
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| 7 |
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| 8 | import org.expeditee.core.Font;
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| 9 | import org.expeditee.gio.FontManager;
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| 10 |
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| 11 | /**
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| 12 | * The font manager for a Swing system.
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| 13 | *
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| 14 | * @author cts16
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| 15 | */
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| 16 | public class SwingFontManager extends FontManager {
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| 17 |
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[1125] | 18 | private static final String DEFAULT_SWING_FONT = DEFAULT_FONT_FAMILY + "-Plain-" + DEFAULT_FONT_SIZE;
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| 19 |
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[1097] | 20 | /** Singleton instance. */
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| 21 | private static SwingFontManager _instance = null;
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| 22 |
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| 23 | /** Singleton instantiator. */
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| 24 | public static SwingFontManager getInstance()
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| 25 | {
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| 26 | if (_instance == null) _instance = new SwingFontManager();
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| 27 |
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| 28 | return _instance;
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| 29 | }
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| 30 |
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| 31 | /** Mapping from handles to internal fonts. */
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| 32 | private HashMap<Font, java.awt.Font> _fontMap;
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| 33 | /** The font family names registered with the manager. */
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| 34 | private HashSet<String> _fontNames;
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| 35 |
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| 36 | /** Private constructor for singleton instance. */
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| 37 | private SwingFontManager()
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| 38 | {
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| 39 | // Initialise the font map
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| 40 | _fontMap = new HashMap<Font, java.awt.Font>();
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| 41 |
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| 42 | // Initialise the set of family names
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| 43 | _fontNames = new HashSet<String>();
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| 44 |
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| 45 | // Initialise default font to Swing default
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[1125] | 46 | setDefaultFont(register(java.awt.Font.decode(DEFAULT_SWING_FONT)));
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[1097] | 47 |
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| 48 | // Add Swing standard fonts to registered fonts
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| 49 | registerSwingStandardFonts();// TODO: Reinstate. cts16
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| 50 | }
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| 51 |
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| 52 | @Override
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| 53 | public Font registerFontFile(File fontFile)
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| 54 | {
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| 55 | if (fontFile == null) return null;
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| 56 |
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| 57 | java.awt.Font swingFont = null;
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| 58 | boolean registerOkay = true;
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| 59 |
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| 60 | // Create the internal font from the given file
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| 61 | try {
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| 62 | swingFont = java.awt.Font.createFont(java.awt.Font.TRUETYPE_FONT, fontFile);
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| 63 | if (swingFont == null) registerOkay = false;
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| 64 | } catch (Exception e) {
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| 65 | registerOkay = false;
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| 66 | }
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| 67 |
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| 68 | // Register the new font with the Swing system
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| 69 | if (registerOkay) {
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| 70 | registerOkay = GraphicsEnvironment.getLocalGraphicsEnvironment().registerFont(swingFont);
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| 71 | }
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| 72 |
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| 73 | // Register the new font with ourselves
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| 74 | if (registerOkay) {
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| 75 | return register(swingFont).clone();
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| 76 | }
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| 77 |
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| 78 | // If we made it here the registration failed
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| 79 | return null;
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| 80 | }
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| 81 |
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| 82 | @Override
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| 83 | public String[] getRegisteredFontFamilies() {
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| 84 |
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| 85 | return _fontNames.toArray(new String[_fontNames.size()]);
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| 86 | }
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| 87 |
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| 88 | @Override
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| 89 | public boolean isFontFamilyRegistered(String fontFamily)
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| 90 | {
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| 91 | return _fontNames.contains(fontFamily);
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| 92 | }
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| 93 |
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| 94 | @Override
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| 95 | public Font getActualFont(Font font)
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| 96 | {
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| 97 | return extractFontForInternalFont(register(font));
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| 98 | }
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| 99 |
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| 100 | /** Gets a string for the font style in the form expected by java.awt.Font.decode(String). */
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| 101 | private String getStringForStyle(Font.Style style)
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| 102 | {
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| 103 | if (style == Font.Style.BOLD_ITALIC) return "BOLDITALIC";
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| 104 | else if (style == Font.Style.BOLD) return "BOLD";
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| 105 | else if (style == Font.Style.ITALIC) return "ITALIC";
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| 106 | else return "PLAIN";
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| 107 | }
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| 108 |
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| 109 | /** Registers the given handle with the manager and returns the internal font. */
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| 110 | private java.awt.Font register(Font font)
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| 111 | {
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| 112 | if (register(null, font) == null) return null;
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| 113 |
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| 114 | return _fontMap.get(font);
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| 115 | }
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| 116 |
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| 117 | /** Registers the given font with the manager and returns the generated handle. */
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| 118 | private Font register(java.awt.Font swingFont)
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| 119 | {
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| 120 | return register(swingFont, null);
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| 121 | }
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| 122 |
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| 123 | /** Registers a handle/font pair. */
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| 124 | private Font register(java.awt.Font swingFont, Font font)
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| 125 | {
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| 126 | if (swingFont == null && font == null) return null;
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| 127 |
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| 128 | if (_fontMap.containsKey(font)) return font;
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| 129 |
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| 130 | if (font == null) {
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| 131 | font = extractFontForInternalFont(swingFont);
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| 132 | } else if (swingFont == null) {
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| 133 | swingFont = java.awt.Font.decode(font.getFamilyName() + "-" + getStringForStyle(font.getStyle()) + "-" + font.getSize());
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| 134 | }
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| 135 |
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| 136 | if (swingFont == null || font == null) return null;
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| 137 |
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| 138 | _fontMap.put(font, swingFont);
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| 139 | _fontNames.add(swingFont.getFamily());
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| 140 |
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| 141 | return font;
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| 142 | }
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| 143 |
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| 144 | /** Creates a handle to match the given Swing font. */
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| 145 | private Font extractFontForInternalFont(java.awt.Font swingFont)
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| 146 | {
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| 147 | if (swingFont == null) return null;
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| 148 |
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| 149 | Font font = new Font(swingFont.getFamily());
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| 150 | font.setStyle(Font.Style.PLAIN);
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| 151 | if (swingFont.isBold()) font.toggleBold();
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| 152 | if (swingFont.isItalic()) font.toggleItalic();
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| 153 | font.setSize(swingFont.getSize());
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| 154 | Number spacing = (Number) swingFont.getAttributes().get(java.awt.font.TextAttribute.TRACKING);
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| 155 | if (spacing != null) font.setSpacing(spacing.floatValue());
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| 156 |
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| 157 | return font;
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| 158 | }
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| 159 |
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| 160 | /** Gets the internal Swing font object for use by other Swing managers. */
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| 161 | public java.awt.Font getInternalFont(Font font)
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| 162 | {
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| 163 | return register(font);
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| 164 | }
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| 165 |
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| 166 | /** Registers any standard fonts available on the system with the manager. */
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| 167 | private void registerSwingStandardFonts()
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| 168 | {
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| 169 | String[] standardFontNames = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
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| 170 |
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| 171 | for (String name : standardFontNames) {
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| 172 | register(new Font(name));
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| 173 | }
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| 174 | }
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| 175 | }
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