JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.awt;

import sun.font.FcFontConfiguration;
import sun.font.FontConfigManager;
import sun.font.SunFontManager;

/**
 * A {@link sun.font.FontManager} that uses fontconfig to find system fonts.
 */
public class FcFontManager extends SunFontManager {

    private FontConfigManager fcManager = null;

    public synchronized FontConfigManager getFontConfigManager() {

        if (fcManager == null) {
            fcManager = new FontConfigManager();
        }

        return fcManager;
    }

    @Override
    protected FontConfiguration createFontConfiguration() {
        FcFontConfiguration fcFontConfig = new FcFontConfiguration(this);
        if (fcFontConfig.init()) {
            return fcFontConfig;
        } else {
            throw new InternalError("failed to initialize fontconfig");
        }
    }

    @Override
    public FontConfiguration createFontConfiguration(boolean preferLocaleFonts,
                                                     boolean preferPropFonts) {
        FcFontConfiguration fcFontConfig =
            new FcFontConfiguration(this, preferLocaleFonts, preferPropFonts);
        if (fcFontConfig.init()) {
            return fcFontConfig;
        } else {
            throw new InternalError("failed to initialize fontconfig");
        }
    }

    @Override
    protected String[] getDefaultPlatformFont() {
        final String[] info = new String[2];
        getFontConfigManager().initFontConfigFonts(false);
        FontConfigManager.FcCompFont[] fontConfigFonts =
            getFontConfigManager().getFontConfigFonts();
        if (fontConfigFonts != null) {
            for (int i=0; i<fontConfigFonts.length; i++) {
                if ("sans".equals(fontConfigFonts[i].fcFamily) &&
                    0 == fontConfigFonts[i].style) {
                    info[0] = fontConfigFonts[i].firstFont.fullName;
                    info[1] = fontConfigFonts[i].firstFont.fontFile;
                    break;
                }
            }
        }
        /* Absolute last ditch attempt in the face of fontconfig problems.
         * If we didn't match, pick the first, or just make something
         * up so we don't NPE.
         */
        if (info[0] == null) {
            if (fontConfigFonts != null && fontConfigFonts.length > 0 &&
                fontConfigFonts[0].firstFont.fontFile != null) {
                info[0] = fontConfigFonts[0].firstFont.fullName;

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