The input method is disabled only if it's really needed

When QPlatformInputContext object does not support input method and
the focus object/focus object wrapper do not support input method,
it's really needed to disable it.

qt5/platforminputcontext/qfcitxplatforminputcontext.cpp

@@ -247,6 +247,10 @@ bool QFcitxPlatformInputContext::objectAcceptsInputMethod() const {
     return enabled;
 }
 
+bool QFcitxPlatformInputContext::shouldDisableInputMethod() const {
+    return !inputMethodAccepted() && !objectAcceptsInputMethod();
+}
+
 void QFcitxPlatformInputContext::cleanUp() {
     icMap_.clear();
 
@@ -330,7 +334,7 @@ void QFcitxPlatformInputContext::update(Qt::InputMethodQueries queries) {
     }
 
     if (queries & Qt::ImEnabled) {
-        if (!inputMethodAccepted() && !objectAcceptsInputMethod()) {
+        if (shouldDisableInputMethod()) {
             addCapability(data, FcitxCapabilityFlag_Disable);
         } else {
             removeCapability(data, FcitxCapabilityFlag_Disable);
@@ -569,7 +573,7 @@ void QFcitxPlatformInputContext::createInputContextFinished(
     }
     flag |= FcitxCapabilityFlag_ClientSideInputPanel;
 
-    if (!inputMethodAccepted() || !objectAcceptsInputMethod()) {
+    if (shouldDisableInputMethod()) {
         flag |= FcitxCapabilityFlag_Disable;
     }
 
@@ -939,7 +943,7 @@ bool QFcitxPlatformInputContext::filterEvent(const QEvent *event) {
         //hanteng 2022/10/18
         if (keycode == 248)
             break;
-        if (!inputMethodAccepted() && !objectAcceptsInputMethod())
+        if (shouldDisableInputMethod())
             break;
 
         QObject *input = qGuiApp->focusObject();

qt5/platforminputcontext/qfcitxplatforminputcontext.h

@@ -185,6 +185,7 @@ private:
 
     void updateCursorRect();
     bool objectAcceptsInputMethod() const;
+    bool shouldDisableInputMethod() const;
 
     FcitxQtWatcher *watcher_;
     QString preedit_;