FontAwesomeOffline.java

/**
     * This is a wrapper class that registers the font awesome .ttf included in the package.
     * ControlsFX loads this font dynamically at run time from a CDN. Thus, it works only if Internet
     * connection is available
     * .
     * This class registers an included version of the font. The {@link #init()} method should be called
     * during the initialization procedure of the application such that the font is available early.
     *
     * @author albrecht
     */
    private static class FontAwesomeOffline {

        private static final String fontLocation = "assets/fonts/fontawesome-webfont.ttf";
        private static GlyphFont font;

        private FontAwesomeOffline() {
            // prevent instances
        }

        public static void init() {
            InputStream input = FontAwesomeOffline.class.getClassLoader().getResourceAsStream(fontLocation);
            if (input != null) {
                font = new FontAwesome(input);
                GlyphFontRegistry.register(font);
                LOG.info("Using {} from local assets.", font.getName());
                // Note: if we would close the input stream, icons would not be displayed anymore!
            } else {
                LOG.error("Could not initialize font awesome: " + fontLocation);
            }
        }

        public static GlyphFont getGlyphFont() {
            return font;
        }

    }