[ABANDONED] [WebMIDI] Support the legacy MIDIAccess port API.

Source/bindings/modules/v8/custom/V8MIDIAccessCustom.cpp

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "bindings/modules/v8/V8MIDIAccess.h"
+
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/modules/v8/V8MIDIInputMap.h"
+#include "bindings/modules/v8/V8MIDIOutputMap.h"
+#include "modules/webmidi/MIDIInputMap.h"
+#include "modules/webmidi/MIDIOutputMap.h"
+
+// This implementation is needed to keep the old inputs / outputs APIs. Delete
+// it after the new APIs are widely accepted.
+
+namespace blink {
+
+namespace {
+
+#define DEFINE_BOUND_FUNCTION(name) \
+void name(const v8::FunctionCallbackInfo<v8::Value>& info) \
+{ \
+    v8::Isolate* isolate = info.GetIsolate(); \
+    v8::Local<v8::Object> mapWrapper = info.Data().As<v8::Object>(); \
+    v8::Local<v8::Value> functionObject = mapWrapper->Get(v8String(isolate, #name)); \
+    if (functionObject.IsEmpty() || !functionObject->IsFunction()) { \
+        V8ThrowException::throwTypeError("Cannot call the function", isolate); \
+        return; \
+    } \
+    v8::Local<v8::Function> function = functionObject.As<v8::Function>(); \
+    Vector<v8::Local<v8::Value> > args; \
+    for (int i = 0; i < info.Length(); ++i) \
+        args.append(info[i]); \
+    info.GetReturnValue().Set(function->Call(mapWrapper, info.Length(), info.Length() > 0 ? &args[0] : 0)); \
+}
+
+DEFINE_BOUND_FUNCTION(keys)
+DEFINE_BOUND_FUNCTION(entries)
+DEFINE_BOUND_FUNCTION(values)
+DEFINE_BOUND_FUNCTION(get)
+DEFINE_BOUND_FUNCTION(has)
+
+void size(v8::Local<v8::String>, const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    v8::Isolate* isolate = info.GetIsolate();
+    v8::Local<v8::Object> mapWrapper = info.Data().As<v8::Object>();
+    info.GetReturnValue().Set(mapWrapper->Get(v8String(isolate, "size")));
+}
+
+void installMapMethods(v8::Isolate* isolate, v8::Handle<v8::Object> wrapper, v8::Handle<v8::Object> mapWrapper)
+{
+    wrapper->SetAccessor(v8String(isolate, "size"), size, 0, mapWrapper);
+    wrapper->Set(v8String(isolate, "keys"), v8::Function::New(isolate, keys, mapWrapper));
+    wrapper->Set(v8String(isolate, "entries"), v8::Function::New(isolate, entries, mapWrapper));
+    wrapper->Set(v8String(isolate, "values"), v8::Function::New(isolate, values, mapWrapper));
+    wrapper->Set(v8String(isolate, "get"), v8::Function::New(isolate, get, mapWrapper));
+    wrapper->Set(v8String(isolate, "has"), v8::Function::New(isolate, has, mapWrapper));
+    wrapper->Set(v8::Symbol::GetIterator(isolate), v8::Function::New(isolate, values, mapWrapper));
+}
+
+void inputsArray(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    MIDIAccess* impl = V8MIDIAccess::toNative(info.Data().As<v8::Object>());
+    v8SetReturnValue(info, v8Array(impl->inputsAsVector(), info.Holder(), info.GetIsolate()));
+}
+
+void outputsArray(const v8::FunctionCallbackInfo<v8::Value>& info)
+{
+    MIDIAccess* impl = V8MIDIAccess::toNative(info.Data().As<v8::Object>());
+    v8SetReturnValue(info, v8Array(impl->outputsAsVector(), info.Holder(), info.GetIsolate()));
+}
+
+} // namespace
+
+void V8MIDIAccess::inputsAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    v8::Handle<v8::Object> holder = info.Holder();
+    MIDIAccess* impl = V8MIDIAccess::toNative(holder);
+    RawPtr<MIDIInputMap> cppValue(impl->inputs());
+    v8::Handle<v8::Value> wrapper = toV8(cppValue.get(), holder, info.GetIsolate());
+    if (!wrapper.IsEmpty() && wrapper->IsObject()) {
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "inputs"), wrapper);
+        v8::Local<v8::Function> function = v8::Function::New(info.GetIsolate(), inputsArray, holder);
+        installMapMethods(info.GetIsolate(), function, wrapper.As<v8::Object>());
+        v8SetReturnValue(info, function);
+    }
+}
+
+void V8MIDIAccess::outputsAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
+{
+    v8::Handle<v8::Object> holder = info.Holder();
+    MIDIAccess* impl = V8MIDIAccess::toNative(holder);
+    RawPtr<MIDIOutputMap> cppValue(impl->outputs());
+    v8::Handle<v8::Value> wrapper = toV8(cppValue.get(), holder, info.GetIsolate());
+    if (!wrapper.IsEmpty() && wrapper->IsObject()) {
+        V8HiddenValue::setHiddenValue(info.GetIsolate(), holder, v8AtomicString(info.GetIsolate(), "outputs"), wrapper);
+        v8::Local<v8::Function> function = v8::Function::New(info.GetIsolate(), outputsArray, holder);
+        installMapMethods(info.GetIsolate(), function, wrapper.As<v8::Object>());
+        v8SetReturnValue(info, function);
+    }
+}
+
+} // namespace blink