Migrating MediaSession messages to mojo

third_party/WebKit/Source/modules/mediasession/MediaSession.cpp

 // Copyright 2015 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/mediasession/MediaSession.h"
 
 #include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "modules/mediasession/MediaMetadata.h"
-#include "modules/mediasession/MediaSessionError.h"
+#include "modules/mediasession/MediaArtwork.h"
+#include "public/platform/WebIconSizesParser.h"
+#include "public/platform/InterfaceProvider.h"
 #include <memory>
 
 namespace blink {
 
-MediaSession::MediaSession(std::unique_ptr<WebMediaSession> webMediaSession)
-    : m_webMediaSession(std::move(webMediaSession))
-{
-    DCHECK(m_webMediaSession);
+namespace {
+
+mojom::blink::MediaMetadataIconPtr ToMojoMediaMetadataIcon(
+    const MediaArtwork* icon) {
+    DCHECK(icon);
+    mojom::blink::MediaMetadataIconPtr mojo_icon
+            = mojom::blink::MediaMetadataIcon::New();
+    mojo_icon->src = KURL(ParsedURLString, icon->src());
+    mojo_icon->type = icon->type();
+    WebVector<WebSize> web_sizes = WebIconSizesParser::parseIconSizes(icon->sizes());
+    mojo_icon->sizes.resize(web_sizes.size());
+    memcpy(mojo_icon->sizes.data(), web_sizes.data(), web_sizes.size() * sizeof(WebSize));
+    return mojo_icon;
 }
 
-MediaSession* MediaSession::create(ExecutionContext* context, ExceptionState& exceptionState)
-{
-    Document* document = toDocument(context);
-    LocalFrame* frame = document->frame();
-    FrameLoaderClient* client = frame->loader().client();
-    std::unique_ptr<WebMediaSession> webMediaSession = client->createWebMediaSession();
-    if (!webMediaSession) {
-        exceptionState.throwDOMException(NotSupportedError, "Missing platform implementation.");
-        return nullptr;
+mojom::blink::MediaMetadataPtr ToMojoMediaMetadata(
+    const MediaMetadata* metadata) {
+    mojom::blink::MediaMetadataPtr mojo_metadata;
+    if (!metadata)
+        return mojo_metadata;
+    mojo_metadata = mojom::blink::MediaMetadata::New();
+    mojo_metadata->title = metadata->title();
+    mojo_metadata->artist = metadata->artist();
+    mojo_metadata->album = metadata->album();
+    for (const auto& icon : metadata->artwork()) {
+        // TODO(zqzhang): do sanitization

[mlamouri (slow - plz ping), 2016/09/29 10:26:40]

It would be better if you could do this in this CL.

[Zhiqiang Zhang (Slow), 2016/10/03 20:21:00]

Done.

+        mojo_metadata->artwork.append(ToMojoMediaMetadataIcon(icon.get()));
     }
-    return new MediaSession(std::move(webMediaSession));
+    return mojo_metadata;
 }
 
-ScriptPromise MediaSession::activate(ScriptState* scriptState)
+}  // anonymous namespace
+
+MediaSession::MediaSession()
 {
-    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
-    ScriptPromise promise = resolver->promise();
-
-    m_webMediaSession->activate(new CallbackPromiseAdapter<void, MediaSessionError>(resolver));
-    return promise;
 }
 
-ScriptPromise MediaSession::deactivate(ScriptState* scriptState)
+MediaSession* MediaSession::create()
 {
-    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
-    ScriptPromise promise = resolver->promise();
-
-    m_webMediaSession->deactivate(new CallbackPromiseAdapter<void, void>(resolver));
-    return promise;
+    return new MediaSession();
 }
 
-void MediaSession::setMetadata(MediaMetadata* metadata)
+void MediaSession::setMetadata(ScriptState* scriptState, MediaMetadata* metadata)
 {
-    m_metadata = metadata;
-    if (metadata) {
-        WebMediaMetadata webMetadata = (WebMediaMetadata) *metadata;
-        m_webMediaSession->setMetadata(&webMetadata);
-    } else {
-        m_webMediaSession->setMetadata(nullptr);
-    }
+    if (getService(scriptState))
+        getService(scriptState)->SetMetadata(ToMojoMediaMetadata(metadata));
 }
 
-MediaMetadata* MediaSession::metadata() const
+MediaMetadata* MediaSession::metadata(ScriptState*) const
 {
     return m_metadata;
 }
 
+mojom::blink::MediaSessionService* MediaSession::getService(ScriptState* scriptState)
+{
+    if (!m_service) {
+        InterfaceProvider* interfaceProvider = nullptr;
+        if (scriptState->getExecutionContext()->isDocument()) {
+            Document* document = toDocument(scriptState->getExecutionContext());
+            if (document->frame())
+                interfaceProvider = document->frame()->interfaceProvider();
+        } else {
+            // Can only getService from a frame!!!

[mlamouri (slow - plz ping), 2016/09/29 10:26:40]

I think a DCHECK would be better.

[Zhiqiang Zhang (Slow), 2016/09/30 19:56:15]

Done.

+        }
+
+        if (interfaceProvider)
+            interfaceProvider->getInterface(mojo::GetProxy(&m_service));
+    }
+    return m_service.get();
+}
+
 DEFINE_TRACE(MediaSession)
 {
     visitor->trace(m_metadata);
 }
 
 } // namespace blink