Add QT_IM_MODULES env to allows specify multi IM key

Like as QT_QPA_PLATFORM, supports specifying multiple keys, and can
perform fallback operations to prioritize the use of a certain plug-in.
This is useful when using Wayland and XWayland applications at the same
time. For an example, we can set "QT_IM_MODULES=wayland;fcitx", and the
wayland application will use the wayland input context plugin, the
xwayland application will use fcitx, which can't be done without adding
a new environment variable, if we specify "QT_IM_MODULE=wayland", the
XWayland applications may not be able to use the input method.

Fixes: QTBUG-120202
Change-Id: Iac408af241963147747a2fe685f1e27bf9d9ee64
Reviewed-by: Liang Qi <liang.qi@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: David Edmundson <davidedmundson@kde.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/plugins/platforms/wasm/qwasmintegration.cpp b/src/plugins/platforms/wasm/qwasmintegration.cpp
index d2e7c8716c..01367bd56b 100644
--- a/src/plugins/platforms/wasm/qwasmintegration.cpp
+++ b/src/plugins/platforms/wasm/qwasmintegration.cpp
@@ -222,12 +222,12 @@ QPlatformOpenGLContext *QWasmIntegration::createPlatformOpenGLContext(QOpenGLCon
 
 void QWasmIntegration::initialize()
 {
-    if (qgetenv("QT_IM_MODULE").isEmpty() && touchPoints < 1)
+    auto icStrs = QPlatformInputContextFactory::requested();
+    if (icStrs.isEmpty() && touchPoints < 1)
         return;
 
-    QString icStr = QPlatformInputContextFactory::requested();
-    if (!icStr.isNull())
-        m_inputContext.reset(QPlatformInputContextFactory::create(icStr));
+    if (!icStrs.isEmpty())
+        m_inputContext.reset(QPlatformInputContextFactory::create(icStrs));
     else
         m_inputContext.reset(new QWasmInputContext());
 }