webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 109 insertions, 0 deletions

diff --git a/Source/WebCore/Modules/encryptedmedia/NavigatorEME.cpp b/Source/WebCore/Modules/encryptedmedia/NavigatorEME.cpp
new file mode 100644
index 000000000..edc9a0c7b
--- /dev/null
+++ b/Source/WebCore/Modules/encryptedmedia/NavigatorEME.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2016 Metrological Group B.V.
+ * Copyright (C) 2016 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above
+ *    copyright notice, this list of conditions and the following
+ *    disclaimer in the documentation and/or other materials provided
+ *    with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "NavigatorEME.h"
+
+#if ENABLE(ENCRYPTED_MEDIA)
+
+#include "CDM.h"
+#include "Document.h"
+#include "JSMediaKeySystemAccess.h"
+
+namespace WebCore {
+
+static void tryNextSupportedConfiguration(RefPtr<CDM>&& implementation, Vector<MediaKeySystemConfiguration>&& supportedConfigurations, RefPtr<DeferredPromise>&&);
+
+void NavigatorEME::requestMediaKeySystemAccess(Navigator&, Document& document, const String& keySystem, Vector<MediaKeySystemConfiguration>&& supportedConfigurations, Ref<DeferredPromise>&& promise)
+{
+    // https://w3c.github.io/encrypted-media/#dom-navigator-requestmediakeysystemaccess
+    // W3C Editor's Draft 09 November 2016
+
+    // When this method is invoked, the user agent must run the following steps:
+    // 1. If keySystem is the empty string, return a promise rejected with a newly created TypeError.
+    // 2. If supportedConfigurations is empty, return a promise rejected with a newly created TypeError.
+    if (keySystem.isEmpty() || supportedConfigurations.isEmpty()) {
+        promise->reject(TypeError);
+        return;
+    }
+
+    document.postTask([keySystem, supportedConfigurations = WTFMove(supportedConfigurations), promise = WTFMove(promise), &document] (ScriptExecutionContext&) mutable {
+        // 3. Let document be the calling context's Document.
+        // 4. Let origin be the origin of document.
+        // 5. Let promise be a new promise.
+        // 6. Run the following steps in parallel:
+        // 6.1. If keySystem is not one of the Key Systems supported by the user agent, reject promise with a NotSupportedError.
+        //      String comparison is case-sensitive.
+        if (!CDM::supportsKeySystem(keySystem)) {
+            promise->reject(NOT_SUPPORTED_ERR);
+            return;
+        }
+
+        // 6.2. Let implementation be the implementation of keySystem.
+        RefPtr<CDM> implementation = CDM::create(document, keySystem);
+        tryNextSupportedConfiguration(WTFMove(implementation), WTFMove(supportedConfigurations), WTFMove(promise));
+    });
+}
+
+static void tryNextSupportedConfiguration(RefPtr<CDM>&& implementation, Vector<MediaKeySystemConfiguration>&& supportedConfigurations, RefPtr<DeferredPromise>&& promise)
+{
+    // 6.3. For each value in supportedConfigurations:
+    if (!supportedConfigurations.isEmpty()) {
+        // 6.3.1. Let candidate configuration be the value.
+        // 6.3.2. Let supported configuration be the result of executing the Get Supported Configuration
+        //        algorithm on implementation, candidate configuration, and origin.
+        MediaKeySystemConfiguration candidateCofiguration = WTFMove(supportedConfigurations.first());
+        supportedConfigurations.remove(0);
+
+        CDM::SupportedConfigurationCallback callback = [implementation = implementation, supportedConfigurations = WTFMove(supportedConfigurations), promise] (std::optional<MediaKeySystemConfiguration> supportedConfiguration) mutable {
+            // 6.3.3. If supported configuration is not NotSupported, run the following steps:
+            if (supportedConfiguration) {
+                // 6.3.3.1. Let access be a new MediaKeySystemAccess object, and initialize it as follows:
+                // 6.3.3.1.1. Set the keySystem attribute to keySystem.
+                // 6.3.3.1.2. Let the configuration value be supported configuration.
+                // 6.3.3.1.3. Let the cdm implementation value be implementation.
+                auto access = MediaKeySystemAccess::create(implementation->keySystem(), WTFMove(supportedConfiguration.value()), implementation.releaseNonNull());
+                // 6.3.3.2. Resolve promise with access and abort the parallel steps of this algorithm.
+                promise->resolveWithNewlyCreated<IDLInterface<MediaKeySystemAccess>>(WTFMove(access));
+                return;
+            }
+
+            tryNextSupportedConfiguration(WTFMove(implementation), WTFMove(supportedConfigurations), WTFMove(promise));
+        };
+        implementation->getSupportedConfiguration(WTFMove(candidateCofiguration), WTFMove(callback));
+        return;
+    }
+
+
+    // 6.4. Reject promise with a NotSupportedError.
+    promise->reject(NOT_SUPPORTED_ERR);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(ENCRYPTED_MEDIA)