1 files changed, 69 insertions, 0 deletions
diff --git a/Source/WebKit2/WebProcess/InjectedBundle/DOM/InjectedBundleCSSStyleDeclarationHandle.cpp b/Source/WebKit2/WebProcess/InjectedBundle/DOM/InjectedBundleCSSStyleDeclarationHandle.cpp
new file mode 100644
index 000000000..ac11d11a7
--- /dev/null
+++ b/Source/WebKit2/WebProcess/InjectedBundle/DOM/InjectedBundleCSSStyleDeclarationHandle.cpp
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2014 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 "InjectedBundleCSSStyleDeclarationHandle.h"
+
+#include <WebCore/CSSStyleDeclaration.h>
+#include <wtf/HashMap.h>
+#include <wtf/NeverDestroyed.h>
+
+using namespace WebCore;
+
+namespace WebKit {
+
+typedef HashMap<CSSStyleDeclaration*, InjectedBundleCSSStyleDeclarationHandle*> DOMHandleCache;
+
+static DOMHandleCache& domHandleCache()
+{
+    static NeverDestroyed<DOMHandleCache> cache;
+    return cache;
+}
+
+PassRefPtr<InjectedBundleCSSStyleDeclarationHandle> InjectedBundleCSSStyleDeclarationHandle::getOrCreate(CSSStyleDeclaration* styleDeclaration)
+{
+    if (!styleDeclaration)
+        return nullptr;
+
+    DOMHandleCache::AddResult result = domHandleCache().add(styleDeclaration, nullptr);
+    if (!result.isNewEntry)
+        return PassRefPtr<InjectedBundleCSSStyleDeclarationHandle>(result.iterator->value);
+
+    RefPtr<InjectedBundleCSSStyleDeclarationHandle> styleDeclarationHandle = adoptRef(new InjectedBundleCSSStyleDeclarationHandle(*styleDeclaration));
+    result.iterator->value = styleDeclarationHandle.get();
+    return styleDeclarationHandle.release();
+}
+
+InjectedBundleCSSStyleDeclarationHandle::InjectedBundleCSSStyleDeclarationHandle(CSSStyleDeclaration& styleDeclaration)
+    : m_styleDeclaration(styleDeclaration)
+{
+}
+
+InjectedBundleCSSStyleDeclarationHandle::~InjectedBundleCSSStyleDeclarationHandle()
+{
+    domHandleCache().remove(m_styleDeclaration.ptr());
+}
+
+} // namespace WebKit