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, 5 insertions, 2 deletions

diff --git a/src/client/qwaylanddisplay_p.h b/src/client/qwaylanddisplay_p.h
index b58099ee8..8be911188 100644
--- a/src/client/qwaylanddisplay_p.h
+++ b/src/client/qwaylanddisplay_p.h
@@ -83,6 +83,7 @@ class QPlatformPlaceholderScreen;
 namespace QtWayland {
     class qt_surface_extension;
     class zwp_text_input_manager_v2;
+    class zwp_text_input_manager_v4;
     class qt_text_input_method_manager_v1;
 }
 
@@ -171,7 +172,8 @@ public:
     QWaylandPointerGestures *pointerGestures() const { return mPointerGestures.data(); }
     QWaylandTouchExtension *touchExtension() const { return mTouchExtension.data(); }
     QtWayland::qt_text_input_method_manager_v1 *textInputMethodManager() const { return mTextInputMethodManager.data(); }
-    QtWayland::zwp_text_input_manager_v2 *textInputManager() const { return mTextInputManager.data(); }
+    QtWayland::zwp_text_input_manager_v2 *textInputManagerv2() const { return mTextInputManagerv2.data(); }
+    QtWayland::zwp_text_input_manager_v4 *textInputManagerv4() const { return mTextInputManagerv4.data(); }
     QWaylandHardwareIntegration *hardwareIntegration() const { return mHardwareIntegration.data(); }
     QWaylandXdgOutputManagerV1 *xdgOutputManager() const { return mXdgOutputManager.data(); }
 
@@ -280,7 +282,8 @@ private:
     QScopedPointer<QWaylandPrimarySelectionDeviceManagerV1> mPrimarySelectionManager;
 #endif
     QScopedPointer<QtWayland::qt_text_input_method_manager_v1> mTextInputMethodManager;
-    QScopedPointer<QtWayland::zwp_text_input_manager_v2> mTextInputManager;
+    QScopedPointer<QtWayland::zwp_text_input_manager_v2> mTextInputManagerv2;
+    QScopedPointer<QtWayland::zwp_text_input_manager_v4> mTextInputManagerv4;
     QScopedPointer<QWaylandHardwareIntegration> mHardwareIntegration;
     QScopedPointer<QWaylandXdgOutputManagerV1> mXdgOutputManager;
     int mFd = -1;