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package org.openide.text;

import java.beans.PropertyChangeListener;

import java.io.IOException;

import java.util.ArrayList;

import javax.swing.text.*;

import org.netbeans.junit.*;

import org.openide.awt.UndoRedo;

import org.openide.util.Exceptions;

/**

 * Bug 21237 - Redo should be possible after save.

 *

 * @author  Ernie Rael

 */

public class UndoRedoAfterSaveTest extends NbTestCase implements CloneableEditorSupport.Env {

    static {

        System.setProperty("org.openide.windows.DummyWindowManager.VISIBLE", "false");

    }

    /** the support to work with */

    private CES support;

    // Env variables

    private String content = "Hello";

    private boolean valid = true;

    private boolean modified = false;

    /** if not null contains message why this document cannot be modified */

    private String cannotBeModified;

    private java.util.Date date = new java.util.Date ();

    private java.util.List<PropertyChangeListener> propL = new ArrayList<PropertyChangeListener>();

    private java.beans.VetoableChangeListener vetoL;

    /** Creates new TextTest */

    public UndoRedoAfterSaveTest (String s) {

        super(s);

    }

    protected javax.swing.text.EditorKit createEditorKit() {

        return new NbLikeEditorKit();

    }

    UndoRedo.Manager ur() {

        return support.getUndoRedo();

    }

    @Override

    protected void setUp () {

        support = new CES (this, org.openide.util.Lookup.EMPTY);

    }

    public void testRedoAfterSave() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        d.insertString(d.getLength(), "a", null);

        d.insertString(d.getLength(), "b", null);

        assertEquals("insert: data", "ab", d.getText(0, d.getLength()));

        assertTrue("insert: modified", support.isModified());

        assertTrue("insert: can undo", ur().canUndo());

        assertFalse("insert: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo: data", "a", d.getText(0, d.getLength()));

        assertTrue("undo: modified", support.isModified());

        assertTrue("undo: can undo", ur().canUndo());

        assertTrue("undo: can redo", ur().canRedo());

        support.saveDocument ();

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertTrue("save: can redo", ur().canRedo());

        ur().redo();

        assertEquals("redo: data", "ab", d.getText(0, d.getLength()));

        assertTrue("redo: modified", support.isModified());

        assertTrue("redo: can undo", ur().canUndo());

        assertFalse("redo: no redo", ur().canRedo());

    }

    public void testUndoAfterSaveSimple() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        d.insertString(d.getLength(), "a", null);

        support.saveDocument ();

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertFalse("save: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo1, before savePoint: data", "", d.getText(0, d.getLength()));

        assertTrue("undo1, before savePoint: modified", support.isModified());

        assertFalse("undo1, before savePoint: can undo", ur().canUndo());

        assertTrue("undo1, before savePoint: can redo", ur().canRedo());

    }

    public void testUndoAfterSaveExplore() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        d.insertString(d.getLength(), "a", null);

        support.saveDocument ();

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertFalse("save: no redo", ur().canRedo());

        d.insertString(d.getLength(), "b", null);

        assertEquals("insert, after savePoint: data", "ab", d.getText(0, d.getLength()));

        assertTrue("insert, after savePoint: modified", support.isModified());

        assertTrue("insert, after savePoint: can undo", ur().canUndo());

        assertFalse("insert, after savePoint: no redo", ur().canRedo());

        support.saveDocument ();

        assertFalse("save2: not modified", support.isModified());

        assertTrue("save2: can undo", ur().canUndo());

        assertFalse("save2: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo1, before savePoint2: data", "a", d.getText(0, d.getLength()));

        assertTrue("undo1, before savePoint2: modified", support.isModified());

        assertTrue("undo1, before savePoint2: can undo", ur().canUndo());

        assertTrue("undo1, before savePoint2: can redo", ur().canRedo());

        ur().undo();

        assertEquals("undo2, before savePoint2: data", "", d.getText(0, d.getLength()));

        assertTrue("undo2, before savePoint2: modified", support.isModified());

        assertFalse("undo2, before savePoint2: can undo", ur().canUndo());

        assertTrue("undo2, before savePoint2: can redo", ur().canRedo());

        ur().redo();

        assertEquals("redo1, before savePoint2: data", "a", d.getText(0, d.getLength()));

        assertTrue("redo1, before savePoint2: modified", support.isModified());

        assertTrue("redo1, before savePoint2: can undo", ur().canUndo());

        assertTrue("redo1, before savePoint2: can redo", ur().canRedo());

    }

    public void testUndoAfterSave() throws Exception {

        content = "";

        StyledDocument d = support.openDocument();

        d.insertString(d.getLength(), "a", null);

        support.saveDocument ();

        assertFalse("save: not modified", support.isModified());

        assertTrue("save: can undo", ur().canUndo());

        assertFalse("save: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo1, before savePoint: data", "", d.getText(0, d.getLength()));

        assertTrue("undo1, before savePoint: modified", support.isModified());

        assertFalse("undo1, before savePoint: can undo", ur().canUndo());

        assertTrue("undo1, before savePoint: can redo", ur().canRedo());

        ur().redo(); // back to the save point

        d.insertString(d.getLength(), "b", null);

        assertEquals("insert, after savePoint: data", "ab", d.getText(0, d.getLength()));

        assertTrue("insert, after savePoint: modified", support.isModified());

        assertTrue("insert, after savePoint: can undo", ur().canUndo());

        assertFalse("insert, after savePoint: no redo", ur().canRedo());

        ur().undo();

        assertEquals("undo, at savePoint: data", "a", d.getText(0, d.getLength()));

        assertFalse("undo, at savePoint: not modified", support.isModified());

        assertTrue("undo, at savePoint: can undo", ur().canUndo());

        assertTrue("undo, at savePoint: can redo", ur().canRedo());

        ur().undo();

        assertEquals("undo2, before savePoint: data", "", d.getText(0, d.getLength()));

        assertTrue("undo2, before savePoint: modified", support.isModified());

        assertFalse("undo2, before savePoint: can undo", ur().canUndo());

        assertTrue("undo2, before savePoint: can redo", ur().canRedo());

        ur().redo();

        assertEquals("redo, at savePoint: data", "a", d.getText(0, d.getLength()));

        assertFalse("redo, at savePoint: not modified", support.isModified());

        assertTrue("redo, at savePoint: can undo", ur().canUndo());

        assertTrue("redo, at savePoint: can redo", ur().canRedo());

    }

    //

    // Implementation of the CloneableEditorSupport.Env

    //

    @Override

    public synchronized void addPropertyChangeListener(java.beans.PropertyChangeListener l) {

        propL.add (l);

    }    

    @Override

    public synchronized void removePropertyChangeListener(java.beans.PropertyChangeListener l) {

        propL.remove (l);

    }

    @Override

    public synchronized void addVetoableChangeListener(java.beans.VetoableChangeListener l) {

        assertNull ("This is the first veto listener", vetoL);

        vetoL = l;

    }

    @Override

    public void removeVetoableChangeListener(java.beans.VetoableChangeListener l) {

        assertEquals ("Removing the right veto one", vetoL, l);

        vetoL = null;

    }

    @Override

    public org.openide.windows.CloneableOpenSupport findCloneableOpenSupport() {

        return support;

    }

    @Override

    public String getMimeType() {

        return "text/plain";

    }

    @Override

    public java.util.Date getTime() {

        return date;

    }

    @Override

    public java.io.InputStream inputStream() throws java.io.IOException {

        return new java.io.ByteArrayInputStream (content.getBytes ());

    }

    @Override

    public java.io.OutputStream outputStream() throws java.io.IOException {

        class ContentStream extends java.io.ByteArrayOutputStream {

            @Override

            public void close () throws java.io.IOException {

                super.close ();

                content = new String (toByteArray ());

            }

        }

        return new ContentStream ();

    }

    @Override

    public boolean isValid() {

        return valid;

    }

    @Override

    public boolean isModified() {

        return modified;

    }

    @Override

    public void markModified() throws java.io.IOException {

        if (cannotBeModified != null) {

            IOException e = new IOException ();

            Exceptions.attachLocalizedMessage(e, cannotBeModified);

            throw e;

        }

        modified = true;

    }

    @Override

    public void unmarkModified() {

        modified = false;

    }

    /** Implementation of the CES */

    private final class CES extends CloneableEditorSupport {

        public boolean plain;

        public CES (Env env, org.openide.util.Lookup l) {

            super (env, l);

        }

        @Override

        protected String messageName() {

            return "Name";

        }

        @Override

        protected String messageOpened() {

            return "Opened";

        }

        @Override

        protected String messageOpening() {

            return "Opening";

        }

        @Override

        protected String messageSave() {

            return "Save";

        }

        @Override

        protected String messageToolTip() {

            return "ToolTip";

        }        

        @Override

        protected javax.swing.text.EditorKit createEditorKit() {

            if (plain) {

                return super.createEditorKit ();

            } else {

                return UndoRedoAfterSaveTest.this.createEditorKit ();

            }

        }

    } // end of CES

}