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361 lines
8.7 KiB
Java
361 lines
8.7 KiB
Java
/* AbstractDocument.java --
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.swing.text;
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import javax.swing.event.*;
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import javax.swing.undo.*;
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import java.util.*;
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import javax.swing.tree.*;
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public abstract class AbstractDocument implements Document
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{
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Vector doc_list = new Vector();
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Vector undo_list = new Vector();
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// these still need to be implemented by a derived class:
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public abstract Element getParagraphElement(int pos);
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public abstract Element getDefaultRootElement();
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// some inner classes sun says I should have:
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abstract class AbstractElement implements Element, TreeNode
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{
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int count, offset;
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AttributeSet attr;
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Vector elts = new Vector();
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String name;
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Element parent;
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Vector kids = new Vector();
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TreeNode tree_parent;
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public AbstractElement(Element p, AttributeSet s)
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{ parent = p; attr = s; }
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public Enumeration children() { return kids.elements(); }
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public boolean getAllowsChildren() { return true; }
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public TreeNode getChildAt(int index) { return (TreeNode) kids.elementAt(index); }
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public int getChildCount() { return kids.size(); }
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public int getIndex(TreeNode node) { return kids.indexOf(node); }
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public TreeNode getParent() { return tree_parent; }
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public AttributeSet getAttributes() { return attr; }
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public Document getDocument() { return AbstractDocument.this; }
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public Element getElement(int index) { return (Element)elts.elementAt(index); }
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public String getName() { return name; }
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public Element getParentElement() { return parent; }
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public abstract boolean isLeaf();
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public abstract int getEndOffset();
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public abstract int getElementCount();
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public abstract int getElementIndex(int offset);
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public abstract int getStartOffset();
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}
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interface AttributeContext
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{
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}
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class BranchElement extends AbstractElement
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{
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public BranchElement(Element e, AttributeSet a, int s, int end)
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{ super(e, a); }
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public boolean isLeaf() { return false; }
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public int getEndOffset() { return 0; }
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public int getElementCount() { return 0; }
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public int getElementIndex(int offset) { return 0; }
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public int getStartOffset() { return 0; }
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}
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public interface Content
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{
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public Position createPosition(int offset) throws BadLocationException;
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public int length();
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public UndoableEdit insertString(int where, String str) throws BadLocationException;
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public UndoableEdit remove(int where, int nitems) throws BadLocationException;
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public String getString(int where, int len) throws BadLocationException;
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public void getChars(int where, int len, Segment txt) throws BadLocationException;
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}
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class DefaultDocumentEvent implements DocumentEvent
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{
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int len, off;
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public Document getDocument() { return AbstractDocument.this; }
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public int getLength() { return len; }
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public int getOffset() { return off; }
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public DocumentEvent.EventType getType() { return null; }
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public DocumentEvent.ElementChange getChange(Element elem) { return null; }
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}
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static class ElementEdit
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{
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}
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class LeafElement extends AbstractElement
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{
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LeafElement(Element e, AttributeSet a, int s, int end)
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{ super(e, a); }
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public boolean isLeaf() { return true; }
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public int getEndOffset() { return 0; }
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public int getElementCount() { return 0; }
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public int getElementIndex(int offset) { return 0; }
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public int getStartOffset() { return 0; }
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}
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Content content;
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AbstractDocument(Content doc)
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{
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content = doc;
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}
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/********************************************************
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*
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* the meat:
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*
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***********/
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public void addDocumentListener(DocumentListener listener)
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{
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doc_list.addElement(listener);
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}
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public void addUndoableEditListener(UndoableEditListener listener)
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{
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undo_list.addElement(listener);
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}
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protected Element createBranchElement(Element parent, AttributeSet a)
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{
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return new BranchElement(parent, a, 0, 0);
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}
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protected Element createLeafElement(Element parent, AttributeSet a, int p0, int p1)
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{
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return new LeafElement(parent, a, p0, p1-p0);
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}
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public Position createPosition(int offs)
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{
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final int a = offs;
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return new Position()
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{
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public int getOffset()
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{
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return a;
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}
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};
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}
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protected void fireChangedUpdate(DocumentEvent e)
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{
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}
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protected void fireInsertUpdate(DocumentEvent e)
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{
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}
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protected void fireRemoveUpdate(DocumentEvent e)
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{
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}
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protected void fireUndoableEditUpdate(UndoableEditEvent e)
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{
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}
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int getAsynchronousLoadPriority()
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{
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return 0;
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}
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protected AttributeContext getAttributeContext()
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{
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return null;
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}
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Element getBidiRootElement()
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{
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return null;
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}
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protected Content getContent()
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{
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return content;
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}
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protected Thread getCurrentWriter()
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{
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return null;
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}
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Dictionary getDocumentProperties()
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{
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return null;
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}
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public Position getEndPosition()
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{
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return null;
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}
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public int getLength()
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{
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return content.length();
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}
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EventListener[] getListeners(Class listenerType)
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{
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return null;
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}
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public Object getProperty(Object key)
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{
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return null;
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}
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public Element[] getRootElements()
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{
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return null;
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}
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public Position getStartPosition()
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{
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return null;
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}
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public String getText(int offset, int length)
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{
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try {
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return content.getString(offset, length);
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} catch (Exception e) {
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System.out.println("Hmmm, fail to getText: " + offset + " -> " + length);
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return null;
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}
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}
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public void getText(int offset, int length, Segment txt)
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{
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String a = getText(offset, length);
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if (a == null)
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{
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txt.offset = 0;
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txt.count = 0;
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txt.array = new char[0];
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return;
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}
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txt.offset = offset;
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txt.count = length;
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char chars[] = new char[ a.length() ];
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a.getChars(0, a.length(), chars, 0);
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txt.array = chars;
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}
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public void insertString(int offs, String str, AttributeSet a)
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{
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try {
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content.insertString(offs, str);
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} catch (Exception e) {
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System.err.println("FAILED TO INSERT-STRING: " + e + ", at:"+offs);
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}
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}
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protected void insertUpdate(DefaultDocumentEvent chng, AttributeSet attr)
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{
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}
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protected void postRemoveUpdate(DefaultDocumentEvent chng)
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{
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}
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public void putProperty(Object key, Object value)
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{
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}
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void readLock()
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{
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}
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void readUnlock()
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{
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}
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public void remove(int offs, int len)
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{
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}
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public void removeDocumentListener(DocumentListener listener)
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{
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}
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public void removeUndoableEditListener(UndoableEditListener listener)
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{
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}
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protected void removeUpdate(DefaultDocumentEvent chng)
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{
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}
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public void render(Runnable r)
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{
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}
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void setAsynchronousLoadPriority(int p)
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{
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}
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void setDocumentProperties(Dictionary x)
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{
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}
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protected void writeLock()
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{
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}
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protected void writeUnlock()
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{
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}
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}
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