fix(engine): schema doesn't match the one used by switcher

Closes #269

Author: lotem

src/rime/engine.h

@@ -31,11 +31,11 @@ class Engine : public Messenger {
   Context* context() const { return context_.get(); }
   CommitSink& sink() { return sink_; }
 
-  Context* active_context() const {
-    return active_context_ ? active_context_ : context_.get();
+  Engine* active_engine() {
+    return active_engine_ ? active_engine_ : this;
   }
-  void set_active_context(Context* context = nullptr) {
-    active_context_ = context;
+  void set_active_engine(Engine* engine = nullptr) {
+    active_engine_ = engine;
   }
 
   RIME_API static Engine* Create();
@@ -46,7 +46,7 @@ class Engine : public Messenger {
   the<Schema> schema_;
   the<Context> context_;
   CommitSink sink_;
-  Context* active_context_ = nullptr;
+  Engine* active_engine_ = nullptr;
 };
 
 }  // namespace rime

src/rime/service.cc

@@ -56,11 +56,11 @@ void Session::OnCommit(const string& commit_text) {
 }
 
 Context* Session::context() const {
-  return engine_ ? engine_->active_context() : NULL;
+  return engine_ ? engine_->active_engine()->context() : NULL;
 }
 
 Schema* Session::schema() const {
-  return engine_ ? engine_->schema() : NULL;
+  return engine_ ? engine_->active_engine()->schema() : NULL;
 }
 
 Service::Service() {

src/rime/switcher.cc

@@ -189,13 +189,13 @@ void Switcher::Activate() {
   LOG(INFO) << "switcher is activated.";
   context_->set_option("_fold_options", fold_options_);
   RefreshMenu();
-  engine_->set_active_context(context_.get());
+  engine_->set_active_engine(this);
   active_ = true;
 }
 
 void Switcher::Deactivate() {
   context_->Clear();
-  engine_->set_active_context();
+  engine_->set_active_engine();
   active_ = false;
 }
 

tools/rime_console.cc

@@ -53,7 +53,7 @@ class RimeConsole {
     const Segment &current(comp.back());
     if (!current.menu)
       return;
-    int page_size = engine_->schema()->page_size();
+    int page_size = engine_->active_engine()->schema()->page_size();
     int page_no = current.selected_index / page_size;
     the<Page> page(current.menu->CreatePage(page_size, page_no));
     if (!page)
@@ -81,7 +81,7 @@ class RimeConsole {
     for (const KeyEvent &key : keys) {
       engine_->ProcessKey(key);
     }
-    Context *ctx = engine_->active_context();
+    Context *ctx = engine_->active_engine()->context();
     if (interactive_) {
       PrintComposition(ctx);
     }