Added Web Share (navigator.share) experimental web API (stub).

third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp

+// Copyright 2016 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 "modules/webshare/NavigatorShare.h"
+
+#include "core/dom/DOMException.h"
+#include "core/dom/Document.h"
+#include "core/dom/ExceptionCode.h"
+#include "core/frame/LocalFrame.h"
+#include "core/frame/Navigator.h"
+#include "platform/mojo/MojoHelper.h"
+#include "public/platform/Platform.h"
+#include "public/platform/ServiceRegistry.h"
+
+namespace blink {
+
+class NavigatorShare::ShareClientImpl : public GarbageCollectedFinalized<ShareClientImpl> {
+public:
+    ShareClientImpl(NavigatorShare*, ScriptPromiseResolver*);
+
+    void callback(const String& error);
+
+    DEFINE_INLINE_TRACE()
+    {
+        visitor->trace(m_navigator);
+        visitor->trace(m_resolver);
+    }
+
+private:
+    WeakMember<NavigatorShare> m_navigator;
+    Member<ScriptPromiseResolver> m_resolver;
+};
+
+NavigatorShare::ShareClientImpl::ShareClientImpl(NavigatorShare* navigator_share, ScriptPromiseResolver* resolver)
+    : m_navigator(navigator_share)
+    , m_resolver(resolver)
+{
+}
+
+void NavigatorShare::ShareClientImpl::callback(const String& error)
+{
+    if (m_navigator)
+        m_navigator->m_clients.remove(this);
+
+    if (error.isNull()) {
+        m_resolver->resolve();
+    } else {
+        // TODO(mgiuca): Work out which error type to use.
+        m_resolver->reject(DOMException::create(AbortError, error));
+    }
+}
+
+NavigatorShare::~NavigatorShare() = default;
+
+NavigatorShare& NavigatorShare::from(Navigator& navigator)
+{
+    NavigatorShare* supplement = static_cast<NavigatorShare*>(Supplement<Navigator>::from(navigator, supplementName()));
+    if (!supplement) {
+        supplement = new NavigatorShare();
+        provideTo(navigator, supplementName(), supplement);
+    }
+    return *supplement;
+}
+
+DEFINE_TRACE(NavigatorShare)
+{
+    visitor->trace(m_clients);
+    Supplement<Navigator>::trace(visitor);
+}
+
+NavigatorShare::NavigatorShare()
+{
+}
+
+const char* NavigatorShare::supplementName()
+{
+    return "NavigatorShare";
+}
+
+ScriptPromise NavigatorShare::share(ScriptState* scriptState, const String& title, const String& text)
+{
+    if (!m_service) {
+        Document* doc = toDocument(scriptState->getExecutionContext());
+        DCHECK(doc);
+        LocalFrame* frame = doc->frame();
+        DCHECK(frame);
+        frame->serviceRegistry()->connectToRemoteService(mojo::GetProxy(&m_service));
+        DCHECK(m_service);
+    }
+
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+    ShareClientImpl* client = new ShareClientImpl(this, resolver);
+    m_clients.add(client);
+    ScriptPromise promise = resolver->promise();
+
+    m_service->Share(title, text, convertToBaseCallback(WTF::bind(&ShareClientImpl::callback, wrapPersistent(client))));
+
+    return promise;
+}
+
+ScriptPromise NavigatorShare::share(ScriptState* scriptState, Navigator& navigator, const String& title, const String& text)
+{
+    return from(navigator).share(scriptState, title, text);
+}
+
+} // namespace blink