Import Dart bindings as of Blink r188698. This merely copies the files over and does not attach any…

sky/engine/bindings-dart/core/dart/DartScriptPromiseResolver.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/core/dart/DartScriptPromiseResolver.h"
+
+#include "bindings/common/ScriptPromiseResolverIncludes.h"
+
+namespace blink {
+
+DartScriptPromiseResolver::DartScriptPromiseResolver(DartScriptState* scriptState, ScriptPromiseResolver* owner)
+    : AbstractScriptPromiseResolver()
+    , m_state(Pending)
+    , m_scriptState(scriptState)
+    , m_owner(owner)
+    , m_mode(Default)
+    , m_timer(this, &DartScriptPromiseResolver::onTimerFired)
+    , m_completer()
+#if ENABLE(ASSERT)
+    , m_isPromiseCalled(false)
+#endif
+{
+    Dart_Handle asyncLib = Dart_LookupLibrary(Dart_NewStringFromCString("dart:async"));
+    Dart_Handle completerClass = Dart_GetType(asyncLib, Dart_NewStringFromCString("Completer"), 0, 0);
+    Dart_Handle completer = Dart_New(completerClass, Dart_NewStringFromCString(""), 0, 0);
+    m_completer = Dart_NewPersistentHandle(completer);
+
+    if (executionContext()->activeDOMObjectsAreStopped())
+        m_state = ResolvedOrRejected;
+}
+
+#define DEFINE_RESOLUTION_METHODS(type) \
+void DartScriptPromiseResolver::resolve(type value) { resolveInternal(value); } \
+void DartScriptPromiseResolver::reject(type error) { rejectInternal(error); }
+PROMISE_RESOLUTION_TYPES_LIST(DEFINE_RESOLUTION_METHODS);
+#undef DEFINE_RESOLUTION_METHODS
+
+void DartScriptPromiseResolver::suspend()
+{
+    m_timer.stop();
+}
+
+void DartScriptPromiseResolver::resume()
+{
+    if (m_state == Resolving || m_state == Rejecting)
+        m_timer.startOneShot(0, FROM_HERE);
+}
+
+void DartScriptPromiseResolver::stop()
+{
+    m_timer.stop();
+    clear();
+}
+
+void DartScriptPromiseResolver::keepAliveWhilePending()
+{
+    if (m_state == ResolvedOrRejected || m_mode == KeepAliveWhilePending)
+        return;
+
+    // Keep |this| while the promise is Pending.
+    // deref() will be called in clear().
+    m_mode = KeepAliveWhilePending;
+    m_owner->ref();
+}
+
+void DartScriptPromiseResolver::onTimerFired(Timer<DartScriptPromiseResolver>*)
+{
+    ASSERT(m_state == Resolving || m_state == Rejecting);
+    DartIsolateScope scope(m_scriptState->isolate());
+    DartApiScope apiScope;
+    // FIXMEDART: Remove this.
+    V8ScriptState::Scope v8Scope(m_scriptState->v8ScriptState());
+    resolveOrRejectImmediately();
+}
+
+void DartScriptPromiseResolver::resolveOrRejectImmediately()
+{
+    ASSERT(!executionContext()->activeDOMObjectsAreStopped());
+    ASSERT(!executionContext()->activeDOMObjectsAreSuspended());
+    {
+        if (m_state == Resolving) {
+            Dart_Handle value = Dart_HandleFromPersistent(m_value);
+            Dart_Invoke(m_completer, Dart_NewStringFromCString("complete"), 1, &value);
+        } else {
+            ASSERT(m_state == Rejecting);
+            Dart_Handle error = Dart_HandleFromPersistent(m_value);
+            Dart_Invoke(m_completer, Dart_NewStringFromCString("completeError"), 1, &error);
+        }
+    }
+    clear();
+}
+
+void DartScriptPromiseResolver::clear()
+{
+    if (m_state == ResolvedOrRejected)
+        return;
+    ResolutionState state = m_state;
+    m_state = ResolvedOrRejected;
+    Dart_DeletePersistentHandle(m_completer);
+    Dart_DeletePersistentHandle(m_value);
+
+    if (m_mode == KeepAliveWhilePending) {
+        // |ref| was called in |keepAliveWhilePending|.
+        m_owner->deref();
+    }
+    // |this| may be deleted here, but it is safe to check |state| because
+    // it doesn't depend on |this|. When |this| is deleted, |state| can't be
+    // |Resolving| nor |Rejecting| and hence |this->deref()| can't be executed.
+    if (state == Resolving || state == Rejecting) {
+        // |ref| was called in |resolveOrReject|.
+        m_owner->deref();
+    }
+}
+
+} // namespace blink