Add an option to commit text when switch input method.

Close #13.

Author: wengxt

src/rimeengine.cpp

@@ -260,6 +260,12 @@ void RimeEngine::activate(const InputMethodEntry &, InputContextEvent &event) {
 void RimeEngine::deactivate(const InputMethodEntry &entry,
                             InputContextEvent &event) {
     event.inputContext()->statusArea().clearGroup(StatusGroup::InputMethod);
+    if (event.type() == EventType::InputContextSwitchInputMethod &&
+        *config_.commitWhenDeactivate) {
+        auto inputContext = event.inputContext();
+        auto state = inputContext->propertyFor(&factory_);
+        state->commitPreedit(inputContext);
+    }
     reset(entry, event);
 }
 void RimeEngine::keyEvent(const InputMethodEntry &entry, KeyEvent &event) {

src/rimeengine.h

@@ -31,6 +31,9 @@ FCITX_CONFIGURATION(
     Option<bool> showPreeditInApplication{this, "PreeditInApplication",
                                           _("Show preedit within application"),
                                           false};
+    Option<bool> commitWhenDeactivate{
+        this, "Commit when deactivate.",
+        _("Commit current text when deactivating."), true};
     Option<bool> autoloadPlugins{this, "AutoloadPlugins",
                                  _("Load available plugins automatically"),
                                  false};

src/rimestate.cpp

@@ -214,4 +214,17 @@ void RimeState::release() {
         session_ = 0;
     }
 }
+
+void RimeState::commitPreedit(InputContext *ic) {
+    if (auto api = engine_->api()) {
+        RIME_STRUCT(RimeContext, context);
+        if (!api->get_context(session_, &context)) {
+            return;
+        }
+        if (context.commit_text_preview) {
+            ic->commitString(context.commit_text_preview);
+        }
+    }
+}
+
 } // namespace fcitx

src/rimestate.h

@@ -23,6 +23,7 @@ class RimeState : public InputContextProperty {
     void updatePreedit(InputContext *ic, const RimeContext &context);
     void updateUI(InputContext *ic, bool keyRelease);
     void release();
+    void commitPreedit(InputContext *ic);
 
 private:
     RimeEngine *engine_;