/* * @(#)BasicTextUI.java	1.86 03/02/18 * * Copyright 2003 Sun Microsystems, Inc. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. */package javax.swing.plaf.basic;import java.util.*;import java.awt.*;import java.awt.event.*;import java.awt.font.*;import java.awt.datatransfer.*;import java.awt.dnd.*;import java.awt.im.InputContext;import java.beans.*;import java.io.*;import java.net.*;import javax.swing.*;import javax.swing.plaf.*;import javax.swing.text.*;import javax.swing.event.*;import javax.swing.border.Border;import javax.swing.plaf.UIResource;/** * <p> * Basis of a text components look-and-feel.  This provides the * basic editor view and controller services that may be useful * when creating a look-and-feel for an extension of * <code>JTextComponent</code>. * <p> * Most state is held in the associated <code>JTextComponent</code> * as bound properties, and the UI installs default values for the  * various properties.  This default will install something for * all of the properties.  Typically, a LAF implementation will * do more however.  At a minimum, a LAF would generally install * key bindings. * <p> * This class also provides some concurrency support if the  * <code>Document</code> associated with the JTextComponent is a subclass of * <code>AbstractDocument</code>.  Access to the View (or View hierarchy) is * serialized between any thread mutating the model and the Swing * event thread (which is expected to render, do model/view coordinate * translation, etc).  <em>Any access to the root view should first * acquire a read-lock on the AbstractDocument and release that lock * in a finally block.</em> * <p> * An important method to define is the {@link #getPropertyPrefix} method * which is used as the basis of the keys used to fetch defaults * from the UIManager.  The string should reflect the type of  * TextUI (eg. TextField, TextArea, etc) without the particular  * LAF part of the name (eg Metal, Motif, etc). * <p> * To build a view of the model, one of the following strategies  * can be employed. * <ol> * <li> * One strategy is to simply redefine the  * ViewFactory interface in the UI.  By default, this UI itself acts * as the factory for View implementations.  This is useful * for simple factories.  To do this reimplement the  * {@link #create} method. * <li> * A common strategy for creating more complex types of documents * is to have the EditorKit implementation return a factory.  Since * the EditorKit ties all of the pieces necessary to maintain a type * of document, the factory is typically an important part of that * and should be produced by the EditorKit implementation. * <li> * A less common way to create more complex types is to have * the UI implementation create a. * separate object for the factory.  To do this, the  * {@link #createViewFactory} method should be reimplemented to  * return some factory. * </ol> * <p> * <strong>Warning:</strong> * Serialized objects of this class will not be compatible with * future Swing releases. The current serialization support is * appropriate for short term storage or RMI between applications running * the same version of Swing.  As of 1.4, support for long term storage * of all JavaBeans<sup><font size="-2">TM</font></sup> * has been added to the <code>java.beans</code> package. * Please see {@link java.beans.XMLEncoder}. * * @author  Timothy Prinzing * @version 1.86 02/18/03 */public abstract class BasicTextUI extends TextUI implements ViewFactory {    /**     * Creates a new UI.     */    public BasicTextUI() {        painted = false;    }    /**     * Creates the object to use for a caret.  By default an     * instance of BasicCaret is created.  This method     * can be redefined to provide something else that implements     * the InputPosition interface or a subclass of JCaret.     *     * @return the caret object     */    protected Caret createCaret() {        return new BasicCaret();    }    /**     * Creates the object to use for adding highlights.  By default     * an instance of BasicHighlighter is created.  This method     * can be redefined to provide something else that implements     * the Highlighter interface or a subclass of DefaultHighlighter.     *     * @return the highlighter     */    protected Highlighter createHighlighter() {        return new BasicHighlighter();    }    /**     * Fetches the name of the keymap that will be installed/used      * by default for this UI. This is implemented to create a     * name based upon the classname.  The name is the the name     * of the class with the package prefix removed.     *     * @return the name     */    protected String getKeymapName() {	String nm = getClass().getName();	int index = nm.lastIndexOf('.');	if (index >= 0) {	    nm = nm.substring(index+1, nm.length());	}	return nm;    }    /**     * Creates the keymap to use for the text component, and installs     * any necessary bindings into it.  By default, the keymap is     * shared between all instances of this type of TextUI. The     * keymap has the name defined by the getKeymapName method.  If the     * keymap is not found, then DEFAULT_KEYMAP from JTextComponent is used.     * <p>     * The set of bindings used to create the keymap is fetched      * from the UIManager using a key formed by combining the     * {@link #getPropertyPrefix} method     * and the string <code>.keyBindings</code>.  The type is expected     * to be <code>JTextComponent.KeyBinding[]</code>.     *     * @return the keymap     * @see #getKeymapName     * @see javax.swing.text.JTextComponent     */    protected Keymap createKeymap() {	String nm = getKeymapName();	Keymap map = JTextComponent.getKeymap(nm);	if (map == null) {	    Keymap parent = JTextComponent.getKeymap(JTextComponent.DEFAULT_KEYMAP);	    map = JTextComponent.addKeymap(nm, parent);	    String prefix = getPropertyPrefix();	    Object o = UIManager.get(prefix + ".keyBindings");	    if ((o != null) && (o instanceof JTextComponent.KeyBinding[])) {		JTextComponent.KeyBinding[] bindings = (JTextComponent.KeyBinding[]) o;		JTextComponent.loadKeymap(map, bindings, getComponent().getActions());	    }	}	return map;    }    /**     * This method gets called when a bound property is changed     * on the associated JTextComponent.  This is a hook     * which UI implementations may change to reflect how the     * UI displays bound properties of JTextComponent subclasses.     * This is implemented to do nothing (i.e. the response to     * properties in JTextComponent itself are handled prior     * to calling this method).     *     * @param evt the property change event     */    protected void propertyChange(PropertyChangeEvent evt) {    }    /**     * Gets the name used as a key to look up properties through the     * UIManager.  This is used as a prefix to all the standard     * text properties.     *     * @return the name     */    protected abstract String getPropertyPrefix();    /**     * Initializes component properties, e.g. font, foreground,      * background, caret color, selection color, selected text color,     * disabled text color, and border color.  The font, foreground, and     * background properties are only set if their current value is either null     * or a UIResource, other properties are set if the current     * value is null.     *      * @see #uninstallDefaults     * @see #installUI     */    protected void installDefaults()     {	editor.addMouseListener(defaultDragRecognizer);	editor.addMouseMotionListener(defaultDragRecognizer);	        String prefix = getPropertyPrefix();        Font f = editor.getFont();        if ((f == null) || (f instanceof UIResource)) {            editor.setFont(UIManager.getFont(prefix + ".font"));        }        Color bg = editor.getBackground();        if ((bg == null) || (bg instanceof UIResource)) {            editor.setBackground(UIManager.getColor(prefix + ".background"));        }                Color fg = editor.getForeground();        if ((fg == null) || (fg instanceof UIResource)) {            editor.setForeground(UIManager.getColor(prefix + ".foreground"));        }        Color color = editor.getCaretColor();        if ((color == null) || (color instanceof UIResource)) {            editor.setCaretColor(UIManager.getColor(prefix + ".caretForeground"));        }        Color s = editor.getSelectionColor();        if ((s == null) || (s instanceof UIResource)) {            editor.setSelectionColor(UIManager.getColor(prefix + ".selectionBackground"));        }        Color sfg = editor.getSelectedTextColor();        if ((sfg == null) || (sfg instanceof UIResource)) {            editor.setSelectedTextColor(UIManager.getColor(prefix + ".selectionForeground"));        }        Color dfg = editor.getDisabledTextColor();        if ((dfg == null) || (dfg instanceof UIResource)) {            editor.setDisabledTextColor(UIManager.getColor(prefix + ".inactiveForeground"));        }        Border b = editor.getBorder();        if ((b == null) || (b instanceof UIResource)) {            editor.setBorder(UIManager.getBorder(prefix + ".border"));        }        Insets margin = editor.getMargin();        if (margin == null || margin instanceof UIResource) {            editor.setMargin(UIManager.getInsets(prefix + ".margin"));        }        Caret caret = editor.getCaret();        if (caret == null || caret instanceof UIResource) {            caret = createCaret();            editor.setCaret(caret);                    Object o = UIManager.get(prefix + ".caretBlinkRate");            if ((o != null) && (o instanceof Integer)) {                Integer rate = (Integer) o;                caret.setBlinkRate(rate.intValue());            }        }        Highlighter highlighter = editor.getHighlighter();        if (highlighter == null || highlighter instanceof UIResource) {            editor.setHighlighter(createHighlighter());        }	TransferHandler th = editor.getTransferHandler();	if (th == null || th instanceof UIResource) {	    editor.setTransferHandler(getTransferHandler());	}	DropTarget dropTarget = editor.getDropTarget();	if (dropTarget instanceof UIResource) {            if (defaultDropTargetListener == null) {                defaultDropTargetListener = new TextDropTargetListener();            }	    try {		dropTarget.addDropTargetListener(defaultDropTargetListener);	    } catch (TooManyListenersException tmle) {		// should not happen... swing drop target is multicast	    }	}    }    /**     * Sets the component properties that haven't been explicitly overridden to      * null.  A property is considered overridden if its current value     * is not a UIResource.     *      * @see #installDefaults     * @see #uninstallUI     */    protected void uninstallDefaults()     {	editor.removeMouseListener(defaultDragRecognizer);	editor.removeMouseMotionListener(defaultDragRecognizer);        if (editor.getCaretColor() instanceof UIResource) {            editor.setCaretColor(null);        }                                                                                                 if (editor.getSelectionColor() instanceof UIResource) {            editor.setSelectionColor(null);        }        if (editor.getDisabledTextColor() instanceof UIResource) {            editor.setDisabledTextColor(null);        }        if (editor.getSelectedTextColor() instanceof UIResource) {            editor.setSelectedTextColor(null);        }        if (editor.getBorder() instanceof UIResource) {            editor.setBorder(null);        }        if (editor.getMargin() instanceof UIResource) {            editor.setMargin(null);        }        if (editor.getCaret() instanceof UIResource) {            editor.setCaret(null);        }        if (editor.getHighlighter() instanceof UIResource) {            editor.setHighlighter(null);        }	if (editor.getTransferHandler() instanceof UIResource) {	    editor.setTransferHandler(null);	}    }    /**     * Installs listeners for the UI.     */    protected void installListeners() {    }    /**     * Uninstalls listeners for the UI.     */    protected void uninstallListeners() {    }    protected void installKeyboardActions() {	// backward compatibility support... keymaps for the UI	// are now installed in the more friendly input map.        editor.setKeymap(createKeymap());         InputMap km = getInputMap();	if (km != null) {	    SwingUtilities.replaceUIInputMap(editor, JComponent.WHEN_FOCUSED,					     km);	}		ActionMap map = getActionMap();	if (map != null) {	    SwingUtilities.replaceUIActionMap(editor, map);	}	updateFocusAcceleratorBinding(false);    }    /**     * Get the InputMap to use for the UI.       */    InputMap getInputMap() {	InputMap map = new InputMapUIResource();	InputMap shared = 	    (InputMap)UIManager.get(getPropertyPrefix() + ".focusInputMap");	if (shared != null) {	    map.setParent(shared);