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#685 strange windows scintilla window text problem
There is an odd problem with the scintilla edit control on windows. This comes up in scite,
and the latest purebasic. I use a screen reader, and whenever I
alt+tab to the application, it starts reading strange things. When I examine
the scintilla window with AutoIt window info (a
program that is part of the free autoit scripting language), it's
showing a bunch of strange text in the visible text tab which my
screen reader is reading which
I don't think should be there.
To reproduce this problem, open Scite, and open a few files. Run
autoit window info, go to the scite window and freeze it (control-alt-f). Go back to the
frozen autoit window info window and select visible text.
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I have no idea what AutoIt or the screen reader are doing. Doesn't look like a bug to me.
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I think I've found the problem. Sorry if this is duplicated, I sent it once but didn't get any notification of it.
Somewhere between 1.7.4 and 1.7.5, sending a WM_GETTEXT message to the Scintilla control is returning Garbage. This worked fine in 1.7.4, but when I tested with 1.7.5 and 1.7.6, it returns garbage.
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WM_GETTEXT is behaving the same as before but Scintilla is now often a wide character window so the caller is assuming the data is in UTF-16 format. Retrieving the data as UTF-16 is not trivial so it would be simplest to just fail the operation or return an empty string when IsWindowUnicode is true. WM_GETTEXT has been deprecated as a Scintilla API for 8 years now so it should be being used by any client code.
Diff:
Fix committed as [d25798].
Related
Commit: [d25798]