1 files changed, 107 insertions, 0 deletions
diff --git a/Source/WebCore/page/PerformanceObserver.cpp b/Source/WebCore/page/PerformanceObserver.cpp
new file mode 100644
index 000000000..8d4bfa91a
--- /dev/null
+++ b/Source/WebCore/page/PerformanceObserver.cpp
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+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "PerformanceObserver.h"
+
+#if ENABLE(WEB_TIMING)
+
+#include "DOMWindow.h"
+#include "Document.h"
+#include "ExceptionCode.h"
+#include "Performance.h"
+#include "PerformanceObserverEntryList.h"
+#include "WorkerGlobalScope.h"
+
+namespace WebCore {
+
+PerformanceObserver::PerformanceObserver(ScriptExecutionContext& scriptExecutionContext, Ref<PerformanceObserverCallback>&& callback)
+    : m_callback(WTFMove(callback))
+{
+    if (is<Document>(scriptExecutionContext)) {
+        auto& document = downcast<Document>(scriptExecutionContext);
+        if (DOMWindow* window = document.domWindow())
+            m_performance = window->performance();
+    } else if (is<WorkerGlobalScope>(scriptExecutionContext)) {
+        auto& workerGlobalScope = downcast<WorkerGlobalScope>(scriptExecutionContext);
+        m_performance = &workerGlobalScope.performance();
+    } else
+        ASSERT_NOT_REACHED();
+}
+
+ExceptionOr<void> PerformanceObserver::observe(Init&& init)
+{
+    if (!m_performance)
+        return Exception { TypeError };
+
+    if (init.entryTypes.isEmpty())
+        return Exception { TypeError, ASCIILiteral("entryTypes cannot be an empty list") };
+
+    OptionSet<PerformanceEntry::Type> filter;
+    for (const String& entryType : init.entryTypes) {
+        if (auto type = PerformanceEntry::parseEntryTypeString(entryType))
+            filter |= *type;
+    }
+
+    if (filter.isEmpty())
+        return Exception { TypeError, ASCIILiteral("entryTypes contained only unsupported types") };
+
+    m_typeFilter = filter;
+
+    if (!m_registered) {
+        m_performance->registerPerformanceObserver(*this);
+        m_registered = true;
+    }
+
+    return { };
+}
+
+void PerformanceObserver::disconnect()
+{
+    if (m_performance)
+        m_performance->unregisterPerformanceObserver(*this);
+
+    m_registered = false;
+    m_entriesToDeliver.clear();
+}
+
+void PerformanceObserver::queueEntry(PerformanceEntry& entry)
+{
+    m_entriesToDeliver.append(&entry);
+}
+
+void PerformanceObserver::deliver()
+{
+    if (m_entriesToDeliver.isEmpty())
+        return;
+
+    Vector<RefPtr<PerformanceEntry>> entries = WTFMove(m_entriesToDeliver);
+    auto list = PerformanceObserverEntryList::create(WTFMove(entries));
+    m_callback->handleEvent(list.ptr(), this);
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WEB_TIMING)