/*

 * Copyright (c) 2003, 2008, 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

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 */

package sun.font;

import java.awt.Font;

import java.awt.FontFormatException;

import java.io.File;

import java.util.Locale;

import java.util.TreeMap;

import javax.swing.plaf.FontUIResource;

/**

 * Interface between Java Fonts (java.awt.Font) and the underlying

 * font files/native font resources and the Java and native font scalers.

 */

public interface FontManager {

    // These constants are used in findFont().

    public static final int NO_FALLBACK = 0;

    public static final int PHYSICAL_FALLBACK = 1;

    public static final int LOGICAL_FALLBACK = 2;

    /**

     * Register a new font. Please, note that {@code null} is not a valid

     * argument, and it's caller's responsibility to ensure that, but to keep

     * compatibility, if {@code null} is passed as an argument, {@code false}

     * is returned, and no {@link NullPointerException}

     * is thrown.

     *

     * As additional note, an implementation should ensure that this font

     * cannot override existing installed fonts.

     *

     * @param font

     * @return {@code true} is the font is successfully registered,

     * {@code false} otherwise.

     */

    public boolean registerFont(Font font);

    public void deRegisterBadFont(Font2D font2D);

    /**

     * The client supplies a name and a style.

     * The name could be a family name, or a full name.

     * A font may exist with the specified style, or it may

     * exist only in some other style. For non-native fonts the scaler

     * may be able to emulate the required style.

     */

    public Font2D findFont2D(String name, int style, int fallback);

    /**

     * Creates a Font2D for the specified font file, that is expected

     * to be in the specified font format (according to the constants

     * in java.awt.Font). The parameter {@code isCopy} is set to true

     * when the specified font file is actually a copy of the font data

     * and needs to be deleted afterwards. This method is called

     * for the Font.createFont() methods.

     *

     * @param fontFile the file holding the font data

     * @param fontFormat the expected font format

     * @param isCopy {@code true} if the file is a copy and needs to be

     *        deleted, {@code false} otherwise

     *

     * @return the created Font2D instance

     */

    public Font2D createFont2D(File fontFile, int fontFormat,

                               boolean isCopy, CreatedFontTracker tracker)

        throws FontFormatException;

    /**

     * If usingPerAppContextComposites is true, we are in "applet"

     * (eg browser) enviroment and at least one context has selected

     * an alternate composite font behaviour.

     */

    public boolean usingPerAppContextComposites();

    /**

     * Creates a derived composite font from the specified font (handle).

     *

     * @param family the font family of the derived font

     * @param style the font style of the derived font

     * @param handle the original font (handle)

     *

     * @return the handle for the derived font

     */

    public Font2DHandle getNewComposite(String family, int style,

                                        Font2DHandle handle);

    /**

     * Indicates a preference for locale-specific fonts in the mapping of

     * logical fonts to physical fonts. Calling this method indicates that font

     * rendering should primarily use fonts specific to the primary writing

     * system (the one indicated by the default encoding and the initial

     * default locale). For example, if the primary writing system is

     * Japanese, then characters should be rendered using a Japanese font

     * if possible, and other fonts should only be used for characters for

     * which the Japanese font doesn't have glyphs.

     * <p>

     * The actual change in font rendering behavior resulting from a call

     * to this method is implementation dependent; it may have no effect at

     * all, or the requested behavior may already match the default behavior.

     * The behavior may differ between font rendering in lightweight

     * and peered components.  Since calling this method requests a

     * different font, clients should expect different metrics, and may need

     * to recalculate window sizes and layout. Therefore this method should

     * be called before user interface initialisation.

     *

     * @see #preferProportionalFonts()

     * @since 1.5

     */

    public void preferLocaleFonts();

    /**

     * preferLocaleFonts() and preferProportionalFonts() are called to inform

     * that the application could be using an alternate set of composite

     * fonts, and so the implementation should try to create a CompositeFonts

     * with this directive in mind.

     *

     * @see #preferLocaleFonts()

     */

    public void preferProportionalFonts();

}