1 /*

     2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:

    15 *

    16 */

    17 

    18 package com.nokia.s60tools.hticonnection.ui.views.main;

    19 

    20 import org.eclipse.jface.text.BadLocationException;

    21 import org.eclipse.jface.text.DocumentEvent;

    22 import org.eclipse.jface.text.IDocument;

    23 import org.eclipse.jface.text.IDocumentListener;

    24 import org.eclipse.jface.text.TextViewer;

    25 import org.eclipse.swt.SWT;

    26 import org.eclipse.swt.graphics.Font;

    27 import org.eclipse.swt.graphics.FontData;

    28 import org.eclipse.swt.graphics.Point;

    29 import org.eclipse.swt.widgets.Composite;

    30 

    31 /**

    32  * Viewer for showing text output.

    33  */

    34 public class MainTextViewer extends TextViewer implements IDocumentListener {

    35 	

    36 	/**

    37 	 * View font

    38 	 */

    39 	private String FONT = "Arial"; //$NON-NLS-1$

    40 	/**

    41 	 * View font size

    42 	 */

    43 	private final int FONT_SIZE = 10;

    44 	/**

    45 	 * Scroll lock state.

    46 	 */

    47 	private boolean scrollLock = false;

    48 	

    49 	/**

    50 	 * Constructor.

    51 	 * @param parent Parent composite.

    52 	 * @param styles Style options.

    53 	 */

    54 	public MainTextViewer(Composite parent, int styles){

    55 		super(parent, styles);		

    56 		setEditable(false);

    57 

    58 		IDocument document = LogDocument.getInstance();

    59 		document.addDocumentListener(this);

    60 		

    61 		// Creating input for viewer.

    62 		setInput(document);

    63 	}

    64 	

    65 	/**

    66 	 * Initializing settings for viewer.

    67 	 */

    68 	public void initializeSettings(){

    69 		// Setting correct font.

    70 		Font font = new Font(getControl().getDisplay(),

    71 				new FontData(FONT, FONT_SIZE, SWT.NORMAL));

    72 		getTextWidget().setFont(font);

    73 		

    74 		// Setting view to the end of document.

    75 		setTopIndex(getBottomIndex());

    76 	}

    77 	

    78 	/**

    79 	 * Sets scroll lock on or off.

    80 	 * @param scrollLockState True if setting scroll lock on. False if setting it off.

    81 	 */

    82 	public void setScrollLock(boolean scrollLockState){

    83 		scrollLock = scrollLockState;

    84 	}

    85 	

    86 	/**

    87 	 * Clears text from console.

    88 	 */

    89 	public void clearScreen(){

    90 		// Clearing screen and.

    91 		getDocument().set(""); //$NON-NLS-1$

    92 	}

    93 

    94 	/**

    95 	 * Selects all text from console.

    96 	 */

    97 	public void selectAllText() {

    98 		IDocument document = getDocument();

    99 		setSelectedRange(0, document.getLength());

   100 	}

   101 

   102 	/* (non-Javadoc)

   103 	 * @see org.eclipse.jface.text.IDocumentListener#documentAboutToBeChanged(org.eclipse.jface.text.DocumentEvent)

   104 	 */

   105 	public void documentAboutToBeChanged(DocumentEvent event) {

   106 		// Not needed.

   107 	}

   108 

   109 	/* (non-Javadoc)

   110 	 * @see org.eclipse.jface.text.IDocumentListener#documentChanged(org.eclipse.jface.text.DocumentEvent)

   111 	 */

   112 	public void documentChanged(DocumentEvent event) {

   113 		if(!scrollLock){

   114 			// Scrolling text down to correct location.

   115 			setTopIndex(getDocument().getNumberOfLines());

   116 		}

   117 	}

   118 

   119 	/**

   120 	 * Returns currently selected text.

   121 	 * @return Currently selected text or null if getting selection failed.

   122 	 */

   123 	public String getSelectedText() {

   124 		IDocument document = getDocument();

   125 		Point range = getSelectedRange();

   126 		try {

   127 			// Getting text.

   128 			return document.get(range.x, range.y);

   129 		} catch (BadLocationException e) {

   130 			// Returning null to mean empty string if get fails.

   131 			e.printStackTrace();

   132 		}

   133 		return null;

   134 	}

   135 }