[ServiceWorker] Implement Headers class.

Source/modules/serviceworkers/Headers.h

Index: Source/modules/serviceworkers/Headers.h
diff --git a/Source/modules/serviceworkers/HeaderMap.h b/Source/modules/serviceworkers/Headers.h
similarity index 17%
copy from Source/modules/serviceworkers/HeaderMap.h
copy to Source/modules/serviceworkers/Headers.h
index 3e5b47f567df5b2a6a43bbedb306ed5034928d16..a8fe1873e0656ff735ea2d083a5fd4a800fcd29f 100644
--- a/Source/modules/serviceworkers/HeaderMap.h
+++ b/Source/modules/serviceworkers/Headers.h
@@ -2,46 +2,64 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef HeaderMap_h
-#define HeaderMap_h
+#ifndef Headers_h
+#define Headers_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "modules/serviceworkers/FetchHeaderList.h"
 #include "wtf/Forward.h"
-#include "wtf/HashMap.h"
+#include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
-#include "wtf/text/StringHash.h"
 
 namespace WebCore {
 
-class HeaderMapForEachCallback;
+class Dictionary;
+class ExceptionState;
+class HeadersForEachCallback;
 class ScriptValue;
 
-class HeaderMap FINAL : public ScriptWrappable, public RefCounted<HeaderMap> {
+// http://fetch.spec.whatwg.org/#headers-class
+class Headers FINAL : public ScriptWrappable, public RefCounted<Headers> {
 public:
-    static PassRefPtr<HeaderMap> create();
-    static PassRefPtr<HeaderMap> create(const HashMap<String, String>& headers);
+    enum Guard { ImmutableGuard, RequestGuard, RequestNoCORSGuard, ResponseGuard, NoneGuard };
 
-    // HeaderMap.idl implementation.
+    static PassRefPtr<Headers> create();
+    static PassRefPtr<Headers> create(ExceptionState&);
+    static PassRefPtr<Headers> create(const Headers*, ExceptionState&);
+    static PassRefPtr<Headers> create(const Dictionary&, ExceptionState&);
+
+    ~Headers();
+
+    // Shares the FetchHeaderList. Called when creating a Request or Response.
+    static PassRefPtr<Headers> create(FetchHeaderList*);
+
+    // Headers.idl implementation.
+    void append(const String& name, const String& value, ExceptionState&);
+    void remove(const String& key, ExceptionState&);
+    String get(const String& key, ExceptionState&);
+    Vector<String> getAll(const String& key, ExceptionState&);
+    bool has(const String& key, ExceptionState&);
+    void set(const String& key, const String& value, ExceptionState&);
     unsigned long size() const;
-    void clear();
-    bool remove(const String& key);
-    String get(const String& key);
-    bool has(const String& key);
-    void set(const String& key, const String& value);
-    void forEach(PassOwnPtr<HeaderMapForEachCallback>, ScriptValue&);
-    void forEach(PassOwnPtr<HeaderMapForEachCallback>);
+    void forEach(PassOwnPtr<HeadersForEachCallback>, ScriptValue&);
+    void forEach(PassOwnPtr<HeadersForEachCallback>);
 
-    const HashMap<String, String>& headerMap() const { return m_headers; }
+    void setGuard(Guard guard) { m_guard = guard; }
+    Guard guard() const { return m_guard; }
 
 private:
-    HeaderMap();
-    explicit HeaderMap(const HashMap<String, String>& headers);
-    void forEachInternal(PassOwnPtr<HeaderMapForEachCallback>, ScriptValue* thisArg);
+    Headers();
+    // Shares the FetchHeaderList. Called when creating a Request or Response.
+    Headers(FetchHeaderList*);
+    void forEachInternal(PassOwnPtr<HeadersForEachCallback>, ScriptValue*);
+
+    void fillWith(const Headers*, ExceptionState&);
+    void fillWith(const Dictionary&, ExceptionState&);
 
-    // FIXME: this doesn't preserve ordering while ES6 Map type requires it.
-    HashMap<String, String> m_headers;
+    RefPtr<FetchHeaderList> m_headerList;
+    Guard m_guard;
 };
 
 } // namespace WebCore
 
-#endif // HeaderMap_h
+#endif // Headers_h