Bug 562271

Summary:	Windows: Pasting Non-Empty text onto SWT.MULTI-Text widget causes 2 events (first one with "")
Product:	[Eclipse Project] Platform	Reporter:	Ingo Mohr <tellastory73>
Component:	SWT	Assignee:	Platform-SWT-Inbox <platform-swt-inbox>
Status:	NEW ---	QA Contact:
Severity:	normal
Priority:	P3
Version:	4.15
Target Milestone:	---
Hardware:	PC
OS:	Windows 10
Whiteboard:

Description Ingo Mohr

2020-04-17 14:32:46 EDT

Hi folks! :)

This just took me 2h of debugging in our own client code base, and what I found in the end seems to be a bug in SWT.

Scenario
--------
* Have a Text widget with style: SWT.BORDER | SWT.MULTI
* Enter some text A
* Copy some other text B to clipboard
* Select A and hit Paste (CTRL + V)

Expected
--------
* 1 Event: Text widget has value B

Actual
------
* 2 Events:
** 1: Text widget has value ""
** 2: Text widget has value B

Main Problem (for us) this effect causes is performing UNDO:
* Undoing the change clears the value.
* You have to undo twice to get back to the old value.


Note:
For single line Text widgets - i.e. a Text with style SWT.BORDER (without SWT.MULTI), the scenario works as expected.

Thanks in advance for looking at it. :)

Cheers
Ingo