2 * Copyright (C) 2007 EDIT
3 * European Distributed Institute of Taxonomy
4 * http://www.e-taxonomy.eu
6 * The contents of this file are subject to the Mozilla Public License Version 1.1
7 * See LICENSE.TXT at the top of this package for the full license terms.
10 package eu
.etaxonomy
.taxeditor
.editor
.name
.container
;
12 import java
.util
.ArrayList
;
13 import java
.util
.Collection
;
14 import java
.util
.Scanner
;
16 import org
.eclipse
.swt
.custom
.StyledText
;
17 import org
.eclipse
.swt
.events
.KeyListener
;
18 import org
.eclipse
.swt
.events
.VerifyEvent
;
19 import org
.eclipse
.swt
.events
.VerifyListener
;
22 * Checks text entered into a StyledText widget for line breaks, sends
23 * split text to abstract method handleSplitText().
25 * VerifyListener interface methods break up the text into lines. Each line is sent individually
26 * to the handleSplitText() method when the KeyListener interface method keyReleased() is called.
27 * This is because if the StyledText widget is disposed before the key is released, an SWT
30 * The listener should be set on the StyledText widget as follows:
32 * StyledText styledText = new SourceViewer().getTextWidget();
33 * LineBreakListener lineBreakListener = new LineBreakListener() {
34 * public void handleSplitText(String text) {
35 * ... some operation ...
39 * styledText.addVerifyListener(lineBreakListener);
40 * styledText.addKeyListener(lineBreakListener);
47 public abstract class LineBreakListener
implements VerifyListener
{
49 private static String LINE_BREAK
= System
.getProperty("line.separator");
55 * Checks for 3 conditions of name viewer text:
56 * 1) no line breaks in text
57 * 2) line break at the end of the text
58 * 3) line break in the middle of the text
59 * @see org.eclipse.swt.events.VerifyListener#verifyText(org.eclipse.swt.events.VerifyEvent)
61 public void verifyText(VerifyEvent e
) {
63 String verifyText
= e
.text
;
65 StyledText styledText
= (StyledText
) e
.widget
;
66 String widgetText
= styledText
.getText();
67 int cursorPosition
= styledText
.getCaretOffset();
69 // If no line break in verifyText, Parse text normally
70 if (!verifyText
.contains(LINE_BREAK
)) {
74 // Don't add verifyText without further processing
77 // If user has entered return at the end of the line,
78 // make a new, empty synonym
79 if (widgetText
.length() == cursorPosition
&&
80 verifyText
.equals(LINE_BREAK
)) {
85 // Concatenate old and new texts
86 String textForSplitting
= widgetText
.substring(0, cursorPosition
)
88 + widgetText
.substring(cursorPosition
);
90 // Split on line breaks
91 Scanner scanner
= new Scanner( textForSplitting
);
92 scanner
.useDelimiter(LINE_BREAK
);
94 // Put first string into name viewer
95 styledText
.setText(scanner
.next());
97 // Start new synonyms with the rest
98 while (scanner
.hasNext()) {
99 handleSplitText(scanner
.next());
104 * <p>handleSplitText</p>
106 * @param text a {@link java.lang.String} object.
108 abstract public void handleSplitText(String text
);