[PIVOT-814] TextArea#getText throws IndexOutOfBoundsException when called from TextChanged method under setText

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.0
• Fix Version/s: 2.0.1
• Component/s: wtk
• Assignee: Noel Grandin
• Reporter: Bill van Melle
• Created: 02/Nov/11 02:04
• Updated: 02/Nov/11 11:35
• Resolved: 02/Nov/11 11:35

Description

Within the textChanged listener on my TextArea, I (naturally) call getText. This works fine if textChanged was called as a result of typing into the TextArea. But if it was fired because of a call to setText elsewhere in my program, getText throws IndexOutOfBoundsException. The stack looks like this:

ArrayList<T>.verifyIndexBounds(int, int, int) line: 577
ArrayList<T>.get(int) line: 346
TextArea.getParagraphAt(int) line: 853
TextArea.getText(int, int) line: 632
TextArea.getText() line: 606
<mycode>$2.textChanged(TextArea) line: 122
TextArea$TextAreaContentListenerList.textChanged(TextArea) line: 518
TextArea$ParagraphSequence.remove(int, int) line: 421
TextArea.setText(Reader) line: 722
TextArea.setText(String) line: 667

My workaround is to check for getCharacterCount() being positive before calling getText.

Here's a test case:

<Window title="Empty text area bug" maximized="true"
xmlns:bxml="http://pivot.apache.org/bxml"
xmlns="org.apache.pivot.wtk">
<BoxPane orientation="vertical" styles="

{fill:true}

">
<PushButton buttonData="Set text">
<buttonPressListeners>
function buttonPressed(button)

{ textArea.setText("This is some text"); }

</buttonPressListeners>
</PushButton>
<TextArea bxml:id="textArea">
<textAreaContentListeners>
function textChanged(textArea)

{ importPackage(org.apache.pivot.wtk); Alert.alert(MessageType.INFO, "Text is " + textArea.getText(), textArea.getWindow()); }

</textAreaContentListeners>
</TextArea>
</BoxPane>
</Window>