The existing tests were not properly testing the return value for the case
where all the text fits in the page rect, so this patch adds a couple of
simple tests for this case.
The parent window for the richedit control on creation is the one that
receives notify messages, even after the parent has been changed using
SetParent.
The test that succeeded from this change was as a result of allowing the
end of the character format change be specified using NULL as the rest
of the text. Before, the end paragraph run at the end of the text was
not being set for this case, when all the text was supposed to have its
character format changed.
Wine was not doing bounds checks for EM_GETTEXTRANGE, which was causing
a crash in Bug 17822. The added tests would cause a crash without the
added bounds checks in the richedit code.
The bounds checks I put in HandleMessage, since ME_GetTextRange is also
called for ME_GETSELTEXT which should not have bounds checks, since it
uses the selection range.
When the ME_GETTEXTRANGE message returns 0, no text is copied, not even
the NULL terminating charter. This differs from EM_GETSELTEXT which
will copy the NULL terminating character when no text is selected. This
behaviour is consistent with native richedit controls.
The width for EM_SETTARGETDEVICE is used by some applications to set the
wrapping width to a certain distance in twips. This can be used even
though the target device is ignored.
Using the WS_VSCROLL style causes the ES_AUTOVSCROLL option to be set,
and using the WS_HSCROLL style causes the ES_AUTOHSCROLL flag to be
set (except with richedit v1.0).
The contents of the text can be zoomed in with EM_SETZOOM, or with the
mouse wheel. EM_SETZOOM is implemented, but these tests show bugs in
the implementation, and zooming using the mouse wheel isn't
implemented at all yet.
This fixes inconsistencies shown in the tests I added for the
WM_GETDLGCODE. The tests covered different cases handled by the
current implementation in order to show that the native implementation
is simpler for all these cases.
