Introduce MIDIInputMap and MIDIOutputMap.

Source/modules/webmidi/MIDIAccess.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 19 matching lines @@
 
 #include "config.h"
 #include "modules/webmidi/MIDIAccess.h"
 
 #include "core/dom/Document.h"
 #include "core/loader/DocumentLoadTiming.h"
 #include "core/loader/DocumentLoader.h"
 #include "modules/webmidi/MIDIAccessInitializer.h"
 #include "modules/webmidi/MIDIConnectionEvent.h"
 #include "modules/webmidi/MIDIController.h"
+#include "modules/webmidi/MIDIInput.h"
+#include "modules/webmidi/MIDIInputMap.h"
 #include "modules/webmidi/MIDIOptions.h"
+#include "modules/webmidi/MIDIOutput.h"
+#include "modules/webmidi/MIDIOutputMap.h"
 #include "modules/webmidi/MIDIPort.h"
 #include "platform/AsyncMethodRunner.h"
 #include <v8.h>
 
 namespace blink {
 
 MIDIAccess::MIDIAccess(PassOwnPtr<MIDIAccessor> accessor, bool sysexEnabled, const Vector<MIDIAccessInitializer::PortDescriptor>& ports, ExecutionContext* executionContext)
     : ActiveDOMObject(executionContext)
     , m_accessor(accessor)
     , m_sysexEnabled(sysexEnabled)
 {
     ScriptWrappable::init(this);
     m_accessor->setClient(this);
     for (size_t i = 0; i < ports.size(); ++i) {
         const MIDIAccessInitializer::PortDescriptor& port = ports[i];
         if (port.type == MIDIPort::MIDIPortTypeInput) {
             m_inputs.append(MIDIInput::create(this, port.id, port.manufacturer, port.name, port.version));
         } else {
             m_outputs.append(MIDIOutput::create(this, m_outputs.size(), port.id, port.manufacturer, port.name, port.version));
         }
     }
 }
 
 MIDIAccess::~MIDIAccess()
 {
 }
 
+MIDIInputMap* MIDIAccess::inputs() const
+{
+    HeapHashMap<String, Member<MIDIInput> > inputs;
+    for (size_t i = 0; i < m_inputs.size(); ++i) {
+        MIDIInput* input = m_inputs[i];
+        inputs.add(input->id(), input);
+    }
+    if (inputs.size() != m_inputs.size()) {
+        // There is id duplication that violates the spec.
+        inputs.clear();
+    }
+    return new MIDIInputMap(inputs);
+}
+
+MIDIOutputMap* MIDIAccess::outputs() const
+{
+    HeapHashMap<String, Member<MIDIOutput> > outputs;
+    for (size_t i = 0; i < m_outputs.size(); ++i) {
+        MIDIOutput* output = m_outputs[i];
+        outputs.add(output->id(), output);
+    }
+    if (outputs.size() != m_outputs.size()) {
+        // There is id duplication that violates the spec.
+        outputs.clear();
+    }
+    return new MIDIOutputMap(outputs);
+}
+
 void MIDIAccess::didAddInputPort(const String& id, const String& manufacturer, const String& name, const String& version)
 {
     ASSERT(isMainThread());
     m_inputs.append(MIDIInput::create(this, id, manufacturer, name, version));
 }
 
 void MIDIAccess::didAddOutputPort(const String& id, const String& manufacturer, const String& name, const String& version)
 {
     ASSERT(isMainThread());
     unsigned portIndex = m_outputs.size();
@@ skipping 45 matching lines @@
 }
 
 void MIDIAccess::trace(Visitor* visitor)
 {
     visitor->trace(m_inputs);
     visitor->trace(m_outputs);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink