diff -r 000000000000 -r 4f2f89ce4247 WebKit/chromium/public/WebString.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebKit/chromium/public/WebString.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2009 Google 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * 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
+ * OWNER 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.
+ */
+
+#ifndef WebString_h
+#define WebString_h
+
+#include "WebCommon.h"
+
+#if WEBKIT_IMPLEMENTATION
+namespace WebCore {
+class String;
+class AtomicString;
+}
+#else
+#include <base/nullable_string16.h>
+#include <base/string16.h>
+#endif
+
+namespace WebKit {
+
+class WebCString;
+class WebStringPrivate;
+
+// A UTF-16 string container.  It is inexpensive to copy a WebString
+// object.
+//
+// WARNING: It is not safe to pass a WebString across threads!!!
+//
+class WebString {
+public:
+    ~WebString() { reset(); }
+
+    WebString() : m_private(0) { }
+
+    WebString(const WebUChar* data, size_t len) : m_private(0)
+    {
+        assign(data, len);
+    }
+
+    WebString(const WebString& s) : m_private(0) { assign(s); }
+
+    WebString& operator=(const WebString& s)
+    {
+        assign(s);
+        return *this;
+    }
+
+    WEBKIT_API void reset();
+    WEBKIT_API void assign(const WebString&);
+    WEBKIT_API void assign(const WebUChar* data, size_t len);
+
+    WEBKIT_API bool equals(const WebString& s) const;
+
+    WEBKIT_API size_t length() const;
+    WEBKIT_API const WebUChar* data() const;
+
+    bool isEmpty() const { return !length(); }
+    bool isNull() const { return !m_private; }
+
+    WEBKIT_API WebCString utf8() const;
+
+    WEBKIT_API static WebString fromUTF8(const char* data, size_t length);
+    WEBKIT_API static WebString fromUTF8(const char* data);
+
+    template <int N> WebString(const char (&data)[N])
+        : m_private(0)
+    {
+        assign(fromUTF8(data, N - 1));
+    }
+
+    template <int N> WebString& operator=(const char (&data)[N])
+    {
+        assign(fromUTF8(data, N - 1));
+        return *this;
+    }
+
+#if WEBKIT_IMPLEMENTATION
+    WebString(const WebCore::String&);
+    WebString& operator=(const WebCore::String&);
+    operator WebCore::String() const;
+
+    WebString(const WebCore::AtomicString&);
+    WebString& operator=(const WebCore::AtomicString&);
+    operator WebCore::AtomicString() const;
+#else
+
+    WebString(const string16& s) : m_private(0)
+    {
+        assign(s.data(), s.length());
+    }
+
+    WebString& operator=(const string16& s)
+    {
+        assign(s.data(), s.length());
+        return *this;
+    }
+
+    operator string16() const
+    {
+        size_t len = length();
+        return len ? string16(data(), len) : string16();
+    }
+
+    WebString(const NullableString16& s) : m_private(0)
+    {
+        if (s.is_null())
+            reset();
+        else
+            assign(s.string().data(), s.string().length());
+    }
+
+    WebString& operator=(const NullableString16& s)
+    {
+        if (s.is_null())
+            reset();
+        else
+            assign(s.string().data(), s.string().length());
+        return *this;
+    }
+
+    operator NullableString16() const
+    {
+        if (!m_private)
+            return NullableString16(string16(), true);
+        size_t len = length();
+        return NullableString16(len ? string16(data(), len) : string16(), false);
+    }
+
+    template <class UTF8String>
+    static WebString fromUTF8(const UTF8String& s)
+    {
+        return fromUTF8(s.data(), s.length());
+    }
+#endif
+
+private:
+    void assign(WebStringPrivate*);
+    WebStringPrivate* m_private;
+};
+
+inline bool operator==(const WebString& a, const WebString& b)
+{
+    return a.equals(b);
+}
+
+inline bool operator!=(const WebString& a, const WebString& b)
+{
+    return !(a == b);
+}
+
+} // namespace WebKit
+
+#endif