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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  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef LinkResource_h
     32 #define LinkResource_h
     33 
     34 #include "core/fetch/FetchRequest.h"
     35 #include "platform/heap/Handle.h"
     36 #include "platform/weborigin/KURL.h"
     37 #include "wtf/text/WTFString.h"
     38 
     39 namespace WebCore {
     40 
     41 class HTMLLinkElement;
     42 
     43 class LinkResource : public NoBaseWillBeGarbageCollectedFinalized<LinkResource>  {
     44     WTF_MAKE_NONCOPYABLE(LinkResource); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
     45 public:
     46     enum Type {
     47         Style,
     48         Import,
     49         Manifest
     50     };
     51 
     52     explicit LinkResource(HTMLLinkElement*);
     53     virtual ~LinkResource();
     54 
     55     bool shouldLoadResource() const;
     56     LocalFrame* loadingFrame() const;
     57 
     58     virtual Type type() const = 0;
     59     virtual void process() = 0;
     60     virtual void ownerRemoved() { }
     61     virtual void ownerInserted() { }
     62     virtual bool hasLoaded() const = 0;
     63 
     64     virtual void trace(Visitor*);
     65 
     66 protected:
     67     RawPtrWillBeMember<HTMLLinkElement> m_owner;
     68 };
     69 
     70 class LinkRequestBuilder {
     71     STACK_ALLOCATED();
     72 public:
     73     explicit LinkRequestBuilder(HTMLLinkElement* owner);
     74 
     75     bool isValid() const { return !m_url.isEmpty() && m_url.isValid(); }
     76     const KURL& url() const { return m_url; }
     77     const AtomicString& charset() const { return m_charset; }
     78     FetchRequest build(bool blocking) const;
     79 
     80 private:
     81     RawPtrWillBeMember<HTMLLinkElement> m_owner;
     82     KURL m_url;
     83     AtomicString m_charset;
     84 };
     85 
     86 } // namespace WebCore
     87 
     88 #endif // LinkResource_h
     89