What was done:
* Removed headers in src/gui/accessible/windows/apisupport: as of
v13.1.0, MinGW supports most of the definitions in these headers.
Including uiautomation.h should be enough.
* Removed the QWindowsUiaWrapper class: it's not meant to be extended
or itself instantiated, is an "ultra-thin" layer (it even preserves
the "all-caps" Win types of function args), and is in effect only a
MinGW-bound "kludge". Instead of this class, use the UI Automation
API directly, with the assumption that it's available and fully
functional, as specified in the MS docs. Any gaps between this
assumption and what is delivered by MinGW are bridged with specific
(and explicit) temporary "kludges".
* Implemented said specific "kludges" in qwindowsuiautomation. For
Windows builds, the header just includes uiautomation.h, and the
.cpp is empty. For MinGW, the header contains definitions still
missing from uiautomation.h, and the .cpp implements functions
of the UI Automation core library through imports from the
uiautomationcore DLL.
* Windows plugins (and tst_qaccessibility): use the UI Automation API
definitions directly, instead of the "ultra-thin" wrapper.
* Windows plugin builds: use uiautomationcore library, if found.
What's intended:
* Unburden Gui of the Windows UI Automation COM interfaces and other
definitions that are copied in the uia*.h headers.
* Make the Windows plugins independent of MinGW shortcomings.
* Remove the QWindowsUiaWrapper class that essentially only hides these
shortcomings and the "kludge" code needed to overcome them.
* As MinGW adds further support to the UI Automation API over time,
make it noticeable which workarounds are no longer needed. The
current approach of hiding "kludges" in a wrapper class will also
hide the fact that they're no longer needed, if/when that time comes.
Change-Id: I0070636817d5de81d0b106e9179e2d0442362e2a
Reviewed-by: Wladimir Leuschner <wladimir.leuschner@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
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