Web MIDI API: update open() and close() implementation

Source/modules/webmidi/MIDIPort.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 81 matching lines @@
     case TypeInput:
         return "input";
     case TypeOutput:
         return "output";
     }
     return emptyString();
 }
 
 ScriptPromise MIDIPort::open(ScriptState* scriptState)
 {
-    // TODO(toyoshim): Implement the latest open() algorithm.
-    switch (m_state) {
-    case PortState::MIDIPortStateDisconnected:
-        return reject(scriptState, InvalidStateError, "The port has been disconnected.");
-    case PortState::MIDIPortStateConnected:
-        // TODO(toyoshim): Add blink API to perform a real open operation.
-        setStates(m_state, ConnectionStateOpen);
-        return accept(scriptState);
-    case PortState::MIDIPortStateOpened:
-        // TODO(toyoshim): Remove PortState::MIDIPortStateOpened.
-        ASSERT_NOT_REACHED();
+    if (m_connection == ConnectionStateClosed) {
+        switch (m_state) {
+        case PortState::MIDIPortStateDisconnected:
+            setStates(m_state, ConnectionStatePending);
+            break;
+        case PortState::MIDIPortStateConnected:
+            // TODO(toyoshim): Add blink API to perform a real open and close
+            // operation.
+            setStates(m_state, ConnectionStateOpen);
+            break;
+        case PortState::MIDIPortStateOpened:
+            // TODO(toyoshim): Remove PortState::MIDIPortStateOpened.
+            ASSERT_NOT_REACHED();
+            break;
+        }
     }
-    return reject(scriptState, InvalidStateError, "The port is in unknown state.");
+    return accept(scriptState);
 }
 
 ScriptPromise MIDIPort::close(ScriptState* scriptState)
 {
-    // TODO(toyoshim): Implement the latest close() algorithm.
-    switch (m_state) {
-    case PortState::MIDIPortStateDisconnected:
-        return reject(scriptState, InvalidStateError, "The port has been disconnected.");
-    case PortState::MIDIPortStateConnected:
+    if (m_connection != ConnectionStateClosed) {
+        // TODO(toyoshim): Do clear() operation on MIDIOutput.
         // TODO(toyoshim): Add blink API to perform a real close operation.
         setStates(m_state, ConnectionStateClosed);
-        return accept(scriptState);
-    case PortState::MIDIPortStateOpened:
-        // TODO(toyoshim): Remove PortState::MIDIPortStateOpened.
-        ASSERT_NOT_REACHED();
     }
-    return reject(scriptState, InvalidStateError, "The port is in unknown state.");
+    return accept(scriptState);
 }
 
 void MIDIPort::setState(PortState state)
 {
     setStates(state, m_connection);
 }
 
 ExecutionContext* MIDIPort::executionContext() const
 {
     return m_access->executionContext();
@@ skipping 15 matching lines @@
     return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(ec, message));
 }
 
 void MIDIPort::setStates(PortState state, ConnectionState connection)
 {
     if (m_state == state && m_connection == connection)
         return;
     m_state = state;
     m_connection = connection;
     dispatchEvent(MIDIConnectionEvent::create(this));
+    m_access->dispatchEvent(MIDIConnectionEvent::create(this));
 }
 
 } // namespace blink