Home | History | Annotate | Download | only in parser 
      1 /*
      2  * Copyright (C) 2008, 2009 Apple 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
      6  * are met:
      7  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef SourceProvider_h
     30 #define SourceProvider_h
     31 
     32 #include "UString.h"
     33 #include <wtf/RefCounted.h>
     34 
     35 namespace JSC {
     36 
     37     enum SourceBOMPresence { SourceHasNoBOMs, SourceCouldHaveBOMs };
     38 
     39     class SourceProvider : public RefCounted<SourceProvider> {
     40     public:
     41         SourceProvider(const UString& url, SourceBOMPresence hasBOMs = SourceCouldHaveBOMs)
     42             : m_url(url)
     43             , m_hasBOMs(hasBOMs)
     44         {
     45         }
     46         virtual ~SourceProvider() { }
     47 
     48         virtual UString getRange(int start, int end) const = 0;
     49         virtual const UChar* data() const = 0;
     50         virtual int length() const = 0;
     51 
     52         const UString& url() { return m_url; }
     53         intptr_t asID() { return reinterpret_cast<intptr_t>(this); }
     54 
     55         SourceBOMPresence hasBOMs() const { return m_hasBOMs; }
     56 
     57     private:
     58         UString m_url;
     59         SourceBOMPresence m_hasBOMs;
     60     };
     61 
     62     class UStringSourceProvider : public SourceProvider {
     63     public:
     64         static PassRefPtr<UStringSourceProvider> create(const UString& source, const UString& url)
     65         {
     66             return adoptRef(new UStringSourceProvider(source, url));
     67         }
     68 
     69         UString getRange(int start, int end) const { return m_source.substr(start, end - start); }
     70         const UChar* data() const { return m_source.data(); }
     71         int length() const { return m_source.size(); }
     72 
     73     private:
     74         UStringSourceProvider(const UString& source, const UString& url)
     75             : SourceProvider(url)
     76             , m_source(source)
     77         {
     78         }
     79 
     80         UString m_source;
     81     };
     82 
     83 } // namespace JSC
     84 
     85 #endif // SourceProvider_h
     86