A thread-safe Media Query Parser

Source/core/css/parser/NewCSSTokenizer.h

 /*
  * Copyright (C) 2013 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
@@ skipping 10 matching lines @@
  * 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 URLRegistry_h
-#define URLRegistry_h
+#ifndef NewCSSTokenizer_h
+#define NewCSSTokenizer_h
 
+#include "core/css/parser/CSSToken.h"
+#include "core/html/parser/InputStreamPreprocessor.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
-class KURL;
-class SecurityOrigin;
-class URLRegistry;
+class CSSInputStream;
 
-class URLRegistrable {
+class NewCSSTokenizer {
+    WTF_MAKE_NONCOPYABLE(NewCSSTokenizer);
+    WTF_MAKE_FAST_ALLOCATED;
 public:
-    virtual ~URLRegistrable() { }
-    virtual URLRegistry& registry() const = 0;
+    NewCSSTokenizer();
+
+    CSSToken nextToken(CSSInputStream&);
+    static void tokenize(String, Vector<CSSToken>&);
+
+private:
+    UChar consume();
+    void reconsume(UChar);
+
+    CSSToken consumeStringTokenUntil(UChar);
+    CSSToken consumeNumericToken();
+    CSSToken consumeIdentLikeToken();
+    CSSToken consumeNumber();
+    CSSToken consumeURLToken();
+
+    void consumeUntilNotWhitespace();
+    void consumeThroughCommentEndOrUntilEOF();
+
+    bool consumeIfNext(UChar);
+    bool consumeIfNext(String);
+    String consumeName();
+    UChar consumeEscape();
+
+    bool nextCharIsNameChar();
+    bool nextTwoCharsAreValidEscape();
+    bool nextCharsAreNumber();
+    bool nextCharsAreIdentifier();
+    double convertToNumber(String);
+
+    CSSInputStream* m_input;
 };
 
-class URLRegistry {
-    WTF_MAKE_FAST_ALLOCATED;
-public:
-    virtual ~URLRegistry() { }
-    virtual void registerURL(SecurityOrigin*, const KURL&, URLRegistrable*) = 0;
-    virtual void unregisterURL(const KURL&) = 0;
-
-    // These are optional APIs
-    virtual URLRegistrable* lookup(const String&) { ASSERT_NOT_REACHED(); return 0; }
-    virtual bool contains(const String&) { ASSERT_NOT_REACHED(); return false; }
-};
 
 } // namespace WebCore
 
-#endif // URLRegistry_h
+#endif // NewCSSTokenizer_h