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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Neither the name of Google Inc. nor the names of its
     11  * contributors may be used to endorse or promote products derived from
     12  * this software without specific prior written permission.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     15  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     16  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     17  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     18  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     19  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     20  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #ifndef StyleSheetCandidate_h
     28 #define StyleSheetCandidate_h
     29 
     30 #include "platform/heap/Handle.h"
     31 #include "wtf/text/AtomicString.h"
     32 #include "wtf/text/WTFString.h"
     33 
     34 namespace blink {
     35 
     36 class Document;
     37 class Node;
     38 class StyleSheet;
     39 
     40 class StyleSheetCandidate {
     41     STACK_ALLOCATED();
     42 public:
     43     enum Type {
     44         HTMLLink,
     45         HTMLStyle,
     46         SVGStyle,
     47         Pi
     48     };
     49 
     50     StyleSheetCandidate(Node& node)
     51         : m_node(node)
     52         , m_type(typeOf(node))
     53     { }
     54 
     55     bool isXSL() const;
     56     bool isImport() const;
     57     bool isAlternate() const;
     58     bool isEnabledViaScript() const;
     59     bool isEnabledAndLoading() const;
     60     bool hasPreferrableName(const String& currentPreferrableName) const;
     61     bool canBeActivated(const String& currentPreferrableName) const;
     62 
     63     StyleSheet* sheet() const;
     64     AtomicString title() const;
     65     Document* importedDocument() const;
     66 
     67 private:
     68     bool isElement() const { return m_type != Pi; }
     69     bool isHTMLLink() const { return m_type == HTMLLink; }
     70     Node& node() const { return *m_node; }
     71 
     72     static Type typeOf(Node&);
     73 
     74     RawPtrWillBeMember<Node> m_node;
     75     Type m_type;
     76 };
     77 
     78 }
     79 
     80 #endif
     81 
     82