Home | History | Annotate | Download | only in html 
      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 HTMLImport_h
     32 #define HTMLImport_h
     33 
     34 #include "wtf/Vector.h"
     35 
     36 namespace WebCore {
     37 
     38 class Frame;
     39 class Document;
     40 class Frame;
     41 class HTMLImportRoot;
     42 class HTMLImportsController;
     43 
     44 class HTMLImport {
     45 public:
     46     static bool unblock(HTMLImport*);
     47 
     48     virtual ~HTMLImport() { }
     49 
     50     Frame* frame();
     51     Document* master();
     52     HTMLImportsController* controller();
     53 
     54     bool isLoaded() const { return !isBlocked() && !isProcessing(); }
     55     bool isBlocked() const { return m_blocked; }
     56     void appendChild(HTMLImport*);
     57 
     58     virtual HTMLImportRoot* root() = 0;
     59     virtual HTMLImport* parent() const = 0;
     60     virtual Document* document() const = 0;
     61     virtual void wasDetachedFromDocument() = 0;
     62     virtual void didFinishParsing() = 0;
     63     virtual bool isProcessing() const = 0;
     64 
     65 protected:
     66     HTMLImport()
     67         : m_blocked(false)
     68     { }
     69 
     70 private:
     71     static void block(HTMLImport*);
     72 
     73     void blockAfter(HTMLImport* child);
     74     void block();
     75     void unblock();
     76     void didUnblock();
     77 
     78     bool arePredecessorsLoaded() const;
     79     bool areChilrenLoaded() const;
     80     bool hasChildren() const { return !m_children.isEmpty(); }
     81 
     82     Vector<HTMLImport*> m_children;
     83     bool m_blocked; // If any of decendants or predecessors is in processing, it is blocked.
     84 };
     85 
     86 class HTMLImportRoot : public HTMLImport {
     87 public:
     88     virtual void importWasDisposed() = 0;
     89     virtual HTMLImportsController* toController() = 0;
     90 };
     91 
     92 } // namespace WebCore
     93 
     94 #endif // HTMLImport_h
     95