Description Aleksander Madej 2009-08-24 05:19:06 EDT

The issue is SWT related (3.5.0 on Win XP).

Steps to reproduce:

The example application contains two StyledText controls created in the same way. It also generates sample text with specific character combination (letters between ‘a’ and ‘z’ and space ‘ ‘). The first StyledText displays whole generated text successfully. If application adds at least one character to the end of sample text and puts it to the second StyledText via setText() method, no text is displayed.
More over if a user types any character in the first StyledText the whole existing text disappears. But If backspace is pressed just after the added character then whole text will be shown again. 

My little investigation (maybe it could be helpful): 

Under debugger, one can see that the native method:

”int org.eclipse.swt.internal.win32.OS.ScriptShape(int, int, char[], int, int, SCRIPT_ANALYSIS, int, int, int, int[])”

returns error code: -2147024809 (probably E_INVALIDARG) for the problematic text.

The enclosing method:

”boolean org.eclipse.swt.graphics.TextLayout.shape(int, StyleItem, char[], int[], int, SCRIPT_PROPERTIES)”

ignores this error and reports success despite of the error and the fact that glyphCount[0] contains 0 for our long text.