Implement MediaMetadata artwork in Blink

third_party/WebKit/Source/modules/mediasession/MediaMetadata.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/MediaMetadata.h"
 
+#include "core/dom/ExecutionContext.h"
+#include "modules/mediasession/MediaArtwork.h"
 #include "modules/mediasession/MediaMetadataInit.h"
-#include "wtf/text/WTFString.h"
 
 namespace blink {
 
 // static
-MediaMetadata* MediaMetadata::create(const MediaMetadataInit& metadata)
+MediaMetadata* MediaMetadata::create(ExecutionContext* context, const MediaMetadataInit& metadata)
 {
-    return new MediaMetadata(metadata);
+    return new MediaMetadata(context, metadata);
 }
 
-MediaMetadata::MediaMetadata(const MediaMetadataInit& metadata)
+MediaMetadata::MediaMetadata(ExecutionContext* context, const MediaMetadataInit& metadata)
 {
     m_data.title = metadata.title();
     m_data.artist = metadata.artist();
     m_data.album = metadata.album();
+    if (metadata.hasArtworks()) {
+        WebVector<WebMediaArtwork> webArtworks(metadata.artworks().size());
+        for (size_t i = 0; i < metadata.artworks().size(); ++i) {
+            const MediaArtworkInit& metaArtwork = metadata.artworks()[i];
+            MediaArtwork* artwork = MediaArtwork::create(context, metaArtwork);
+            m_artworks.append(artwork);

[mlamouri (slow - plz ping), 2016/06/02 16:10:06]

Why do you need `m_artworks` compared to m_data.artworks?

[Zhiqiang Zhang (Slow), 2016/06/03 16:07:31]

Done. Now I don't save a copy of WebMediaMetadata in MediaMetadata.

The conversion only happens when it's needed (setMetadata()).

+            webArtworks[i] = *artwork->data();
+            m_data.artworks.swap(webArtworks);
+        }
+    }
 }
 
 String MediaMetadata::title() const
 {
     return m_data.title;
 }
 
 String MediaMetadata::artist() const
 {
     return m_data.artist;
 }
 
 String MediaMetadata::album() const
 {
     return m_data.album;
 }
 
+HeapVector<Member<MediaArtwork>> MediaMetadata::artworks() const
+{
+    return m_artworks;
+}
+
 } // namespace blink