Implement missing C callbacks

ports/libsimpleservo/api/src/lib.rs

@@ -559,6 +559,12 @@ impl ServoGlue {
                 EmbedderMsg::Shutdown => {
                     self.callbacks.host_callbacks.on_shutdown_complete();
                 },
+                EmbedderMsg::ShowIME(..) => {
+                    self.callbacks.host_callbacks.on_ime_state_changed(true);
+                },
+                EmbedderMsg::HideIME => {
+                    self.callbacks.host_callbacks.on_ime_state_changed(false);
+                },
                 EmbedderMsg::Status(..) |
                 EmbedderMsg::SelectFiles(..) |
                 EmbedderMsg::MoveTo(..) |
@@ -568,8 +574,6 @@ impl ServoGlue {
                 EmbedderMsg::NewFavicon(..) |
                 EmbedderMsg::HeadParsed |
                 EmbedderMsg::SetFullscreenState(..) |
-                EmbedderMsg::ShowIME(..) |
-                EmbedderMsg::HideIME |
                 EmbedderMsg::Panic(..) |
                 EmbedderMsg::ReportProfile(..) => {},
             }

support/hololens/ServoApp/ServoControl/Servo.cpp

@@ -4,26 +4,37 @@
 namespace winrt::servo {
 
 void on_load_started() { sServo->Delegate().OnServoLoadStarted(); }
+
 void on_load_ended() { sServo->Delegate().OnServoLoadEnded(); }
+
 void on_history_changed(bool back, bool forward) {
   sServo->Delegate().OnServoHistoryChanged(back, forward);
 }
+
 void on_shutdown_complete() { sServo->Delegate().OnServoShutdownComplete(); }
+
 void on_alert(const char *message) {
   sServo->Delegate().OnServoAlert(char2hstring(message));
 }
+
 void on_title_changed(const char *title) {
   sServo->Delegate().OnServoTitleChanged(char2hstring(title));
 }
+
 void on_url_changed(const char *url) {
   sServo->Delegate().OnServoURLChanged(char2hstring(url));
 }
+
 void flush() { sServo->Delegate().Flush(); }
+
 void make_current() { sServo->Delegate().MakeCurrent(); }
+
 void wakeup() { sServo->Delegate().WakeUp(); }
+
 bool on_allow_navigation(const char *url) {
   return sServo->Delegate().OnServoAllowNavigation(char2hstring(url));
 };
+
 void on_animating_changed(bool aAnimating) {
   sServo->Delegate().OnServoAnimatingChanged(aAnimating);
 }
@@ -32,6 +43,19 @@ void on_panic(const char *backtrace) {
   throw hresult_error(E_FAIL, char2hstring(backtrace));
 }
 
+void on_ime_state_changed(bool aShow) {
+  sServo->Delegate().OnServoIMEStateChanged(aShow);
+}
+
+void set_clipboard_contents(const char* content) {
+  // FIXME
+}
+
+const char* get_clipboard_contents() {
+  // FIXME
+  return nullptr;
+}
+
 Servo::Servo(hstring url, GLsizei width, GLsizei height,
              ServoDelegate &aDelegate)
     : mWindowHeight(height), mWindowWidth(width), mDelegate(aDelegate) {
@@ -59,6 +83,9 @@ Servo::Servo(hstring url, GLsizei width, GLsizei height,
   c.on_animating_changed = &on_animating_changed;
   c.on_shutdown_complete = &on_shutdown_complete;
   c.on_allow_navigation = &on_allow_navigation;
+  c.on_ime_state_changed = &on_ime_state_changed;
+  c.get_clipboard_contents = &get_clipboard_contents;
+  c.set_clipboard_contents = &set_clipboard_contents;
 
   capi::register_panic_handler(&on_panic);
 

support/hololens/ServoApp/ServoControl/Servo.h

@@ -33,6 +33,7 @@ class ServoDelegate {
   virtual void OnServoURLChanged(hstring) = 0;
   virtual bool OnServoAllowNavigation(hstring) = 0;
   virtual void OnServoAnimatingChanged(bool) = 0;
+  virtual void OnServoIMEStateChanged(bool) = 0;
   virtual void Flush() = 0;
   virtual void MakeCurrent() = 0;
 

support/hololens/ServoApp/ServoControl/ServoControl.cpp

@@ -254,6 +254,10 @@ void ServoControl::OnServoAnimatingChanged(bool animating) {
   WakeConditionVariable(&mGLCondVar);
 }
 
+void ServoControl::OnServoIMEStateChanged(bool aShow) {
+  // FIXME: https://docs.microsoft.com/en-us/windows/win32/winauto/uiauto-implementingtextandtextrange
+}
+
 template <typename Callable> void ServoControl::RunOnUIThread(Callable cb) {
   Dispatcher().RunAsync(CoreDispatcherPriority::High, cb);
 }

support/hololens/ServoApp/ServoControl/ServoControl.h

@@ -56,6 +56,7 @@ struct ServoControl : ServoControlT<ServoControl>, public servo::ServoDelegate {
   virtual void MakeCurrent();
   virtual bool OnServoAllowNavigation(winrt::hstring);
   virtual void OnServoAnimatingChanged(bool);
+  virtual void OnServoIMEStateChanged(bool);
 
 private:
   winrt::event<Windows::Foundation::EventHandler<hstring>> mOnURLChangedEvent;