/*

 * Copyright 1997-1998 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package javax.swing.text;

import java.awt.Font;

import java.awt.Color;

/**

 * Interface for a generic styled document.

 *

 * @author  Timothy Prinzing

 */

public interface StyledDocument extends Document {

    /**

     * Adds a new style into the logical style hierarchy.  Style attributes

     * resolve from bottom up so an attribute specified in a child

     * will override an attribute specified in the parent.

     *

     * @param nm   the name of the style (must be unique within the

     *   collection of named styles).  The name may be null if the style

     *   is unnamed, but the caller is responsible

     *   for managing the reference returned as an unnamed style can't

     *   be fetched by name.  An unnamed style may be useful for things

     *   like character attribute overrides such as found in a style

     *   run.

     * @param parent the parent style.  This may be null if unspecified

     *   attributes need not be resolved in some other style.

     * @return the style

     */

    public Style addStyle(String nm, Style parent);

    /**

     * Removes a named style previously added to the document.

     *

     * @param nm  the name of the style to remove

     */

    public void removeStyle(String nm);

    /**

     * Fetches a named style previously added.

     *

     * @param nm  the name of the style

     * @return the style

     */

    public Style getStyle(String nm);

    /**

     * Changes the content element attributes used for the given range of

     * existing content in the document.  All of the attributes

     * defined in the given Attributes argument are applied to the

     * given range.  This method can be used to completely remove

     * all content level attributes for the given range by

     * giving an Attributes argument that has no attributes defined

     * and setting replace to true.

     *

     * @param offset the start of the change >= 0

     * @param length the length of the change >= 0

     * @param s    the non-null attributes to change to.  Any attributes

     *  defined will be applied to the text for the given range.

     * @param replace indicates whether or not the previous

     *  attributes should be cleared before the new attributes

     *  as set.  If true, the operation will replace the

     *  previous attributes entirely.  If false, the new

     *  attributes will be merged with the previous attributes.

     */

    public void setCharacterAttributes(int offset, int length, AttributeSet s, boolean replace);

    /**

     * Sets paragraph attributes.

     *

     * @param offset the start of the change >= 0

     * @param length the length of the change >= 0

     * @param s    the non-null attributes to change to.  Any attributes

     *  defined will be applied to the text for the given range.

     * @param replace indicates whether or not the previous

     *  attributes should be cleared before the new attributes

     *  are set.  If true, the operation will replace the

     *  previous attributes entirely.  If false, the new

     *  attributes will be merged with the previous attributes.

     */

    public void setParagraphAttributes(int offset, int length, AttributeSet s, boolean replace);

    /**

     * Sets the logical style to use for the paragraph at the

     * given position.  If attributes aren't explicitly set

     * for character and paragraph attributes they will resolve

     * through the logical style assigned to the paragraph, which

     * in turn may resolve through some hierarchy completely

     * independent of the element hierarchy in the document.

     *

     * @param pos the starting position >= 0

     * @param s the style to set

     */

    public void setLogicalStyle(int pos, Style s);

    /**

     * Gets a logical style for a given position in a paragraph.

     *

     * @param p the position >= 0

     * @return the style

     */

    public Style getLogicalStyle(int p);

    /**

     * Gets the element that represents the paragraph that

     * encloses the given offset within the document.

     *

     * @param pos the offset >= 0

     * @return the element

     */

    public Element getParagraphElement(int pos);

    /**

     * Gets the element that represents the character that

     * is at the given offset within the document.

     *

     * @param pos the offset >= 0

     * @return the element

     */

    public Element getCharacterElement(int pos);

    /**

     * Takes a set of attributes and turn it into a foreground color

     * specification.  This might be used to specify things

     * like brighter, more hue, etc.

     *

     * @param attr the set of attributes

     * @return the color

     */

    public Color getForeground(AttributeSet attr);

    /**

     * Takes a set of attributes and turn it into a background color

     * specification.  This might be used to specify things

     * like brighter, more hue, etc.

     *

     * @param attr the set of attributes

     * @return the color

     */

    public Color getBackground(AttributeSet attr);

    /**

     * Takes a set of attributes and turn it into a font

     * specification.  This can be used to turn things like

     * family, style, size, etc into a font that is available

     * on the system the document is currently being used on.

     *

     * @param attr the set of attributes

     * @return the font

     */

    public Font getFont(AttributeSet attr);

}