/* * Copyright (c) 1997, 1999, 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 javax.swing.text; import java.io.*; import javax.swing.Action; import javax.swing.JEditorPane; /** * Establishes the set of things needed by a text component * to be a reasonably functioning editor for some type * of text content. The EditorKit acts as a factory for some * kind of policy. For example, an implementation * of html and rtf can be provided that is replaceable * with other implementations. *
* A kit can safely store editing state as an instance
* of the kit will be dedicated to a text component.
* New kits will normally be created by cloning a
* prototype kit. The kit will have it's
* setComponent
method called to establish
* it's relationship with a JTextComponent.
*
* @author Timothy Prinzing
*/
public abstract class EditorKit implements Cloneable, Serializable {
/**
* Construct an EditorKit.
*/
public EditorKit() {
}
/**
* Creates a copy of the editor kit. This is implemented
* to use Object.clone. If the kit cannot be cloned,
* null is returned.
*
* @return the copy
*/
public Object clone() {
Object o;
try {
o = super.clone();
} catch (CloneNotSupportedException cnse) {
o = null;
}
return o;
}
/**
* Called when the kit is being installed into the
* a JEditorPane.
*
* @param c the JEditorPane
*/
public void install(JEditorPane c) {
}
/**
* Called when the kit is being removed from the
* JEditorPane. This is used to unregister any
* listeners that were attached.
*
* @param c the JEditorPane
*/
public void deinstall(JEditorPane c) {
}
/**
* Gets the MIME type of the data that this
* kit represents support for.
*
* @return the type
*/
public abstract String getContentType();
/**
* Fetches a factory that is suitable for producing
* views of any models that are produced by this
* kit.
*
* @return the factory
*/
public abstract ViewFactory getViewFactory();
/**
* Fetches the set of commands that can be used
* on a text component that is using a model and
* view produced by this kit.
*
* @return the set of actions
*/
public abstract Action[] getActions();
/**
* Fetches a caret that can navigate through views
* produced by the associated ViewFactory.
*
* @return the caret
*/
public abstract Caret createCaret();
/**
* Creates an uninitialized text storage model
* that is appropriate for this type of editor.
*
* @return the model
*/
public abstract Document createDefaultDocument();
/**
* Inserts content from the given stream which is expected
* to be in a format appropriate for this kind of content
* handler.
*
* @param in The stream to read from
* @param doc The destination for the insertion.
* @param pos The location in the document to place the
* content >= 0.
* @exception IOException on any I/O error
* @exception BadLocationException if pos represents an invalid
* location within the document.
*/
public abstract void read(InputStream in, Document doc, int pos)
throws IOException, BadLocationException;
/**
* Writes content from a document to the given stream
* in a format appropriate for this kind of content handler.
*
* @param out The stream to write to
* @param doc The source for the write.
* @param pos The location in the document to fetch the
* content from >= 0.
* @param len The amount to write out >= 0.
* @exception IOException on any I/O error
* @exception BadLocationException if pos represents an invalid
* location within the document.
*/
public abstract void write(OutputStream out, Document doc, int pos, int len)
throws IOException, BadLocationException;
/**
* Inserts content from the given stream which is expected
* to be in a format appropriate for this kind of content
* handler.
*
* Since actual text editing is unicode based, this would * generally be the preferred way to read in the data. * Some types of content are stored in an 8-bit form however, * and will favor the InputStream. * * @param in The stream to read from * @param doc The destination for the insertion. * @param pos The location in the document to place the * content >= 0. * @exception IOException on any I/O error * @exception BadLocationException if pos represents an invalid * location within the document. */ public abstract void read(Reader in, Document doc, int pos) throws IOException, BadLocationException; /** * Writes content from a document to the given stream * in a format appropriate for this kind of content handler. *
* Since actual text editing is unicode based, this would * generally be the preferred way to write the data. * Some types of content are stored in an 8-bit form however, * and will favor the OutputStream. * * @param out The stream to write to * @param doc The source for the write. * @param pos The location in the document to fetch the * content >= 0. * @param len The amount to write out >= 0. * @exception IOException on any I/O error * @exception BadLocationException if pos represents an invalid * location within the document. */ public abstract void write(Writer out, Document doc, int pos, int len) throws IOException, BadLocationException; }