Support text-input-unstable-v4-wip

This feature can be enabled by -feature-wayland-text-input-v4-wip.
It is disabled by default.

TextInputManagerV4 is available in a compositor.
zwp_text_input_v4 is available for QT_WAYLAND_TEXT_INPUT_PROTOCOL in
a client
It supports Hangul(Korean) with a qtvirtualkeyboard patchset
(refs/changes/02/357902/3)
It includes some workarounds for ibus because each ibus module has its own
policy for focus-in/focus-out.
enter/leave will synchronize with enable/disable and they will happen
whenever focus-in/focus-out happen.
Cursor/anchor positions are byte offsets.
Surrounding text will be trimmed when it is over 4000 byte.

For debugging,
uses "qt.waylandcompositor.textinput" in a compositor side
uses "qt.qpa.wayland.textinput" in a client side

Tested on qtvirtualkeyboard and ibus

TODO :
 * QTBUG-97248 - event:preedit_commit_mode is not implemented yet. Current
    preedit_commit_mode is 'commit'.
 * request:set_text_change_cause is not implemented.

Task-number: QTBUG-94327
Change-Id: I72644893f40f30c4b03cd6a7d05483d12bde1070
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/compositor/compositor_api/qwaylandinputmethodcontrol_p.h b/src/compositor/compositor_api/qwaylandinputmethodcontrol_p.h
index e25ac48c5..4ca46d135 100644
--- a/src/compositor/compositor_api/qwaylandinputmethodcontrol_p.h
+++ b/src/compositor/compositor_api/qwaylandinputmethodcontrol_p.h
@@ -52,6 +52,9 @@ class QWaylandCompositor;
 class QWaylandSeat;
 class QWaylandSurface;
 class QWaylandTextInput;
+#if QT_WAYLAND_TEXT_INPUT_V4_WIP
+class QWaylandTextInputV4;
+#endif // QT_WAYLAND_TEXT_INPUT_V4_WIP
 class QWaylandQtTextInputMethod;
 
 class Q_WAYLAND_COMPOSITOR_EXPORT QWaylandInputMethodControlPrivate : public QObjectPrivate
@@ -62,6 +65,9 @@ public:
     explicit QWaylandInputMethodControlPrivate(QWaylandSurface *surface);
 
     QWaylandTextInput *textInput() const;
+#if QT_WAYLAND_TEXT_INPUT_V4_WIP
+    QWaylandTextInputV4 *textInputV4() const;
+#endif // QT_WAYLAND_TEXT_INPUT_V4_WIP
     QWaylandQtTextInputMethod *textInputMethod() const;
 
     QWaylandCompositor *compositor = nullptr;