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      1 /*
      2  * Copyright (C) 2010 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 #include "config.h"
     32 
     33 #if ENABLE(BLOB)
     34 
     35 #include "FileReaderSync.h"
     36 
     37 #include "ArrayBuffer.h"
     38 #include "Blob.h"
     39 #include "BlobURL.h"
     40 #include "FileException.h"
     41 #include "FileReaderLoader.h"
     42 #include <wtf/PassRefPtr.h>
     43 
     44 namespace WebCore {
     45 
     46 FileReaderSync::FileReaderSync()
     47 {
     48 }
     49 
     50 PassRefPtr<ArrayBuffer> FileReaderSync::readAsArrayBuffer(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionCode& ec)
     51 {
     52     if (!blob)
     53         return 0;
     54 
     55     FileReaderLoader loader(FileReaderLoader::ReadAsArrayBuffer, 0);
     56     startLoading(scriptExecutionContext, loader, blob, ec);
     57 
     58     return loader.arrayBufferResult();
     59 }
     60 
     61 String FileReaderSync::readAsBinaryString(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionCode& ec)
     62 {
     63     if (!blob)
     64         return String();
     65 
     66     FileReaderLoader loader(FileReaderLoader::ReadAsBinaryString, 0);
     67     startLoading(scriptExecutionContext, loader, blob, ec);
     68     return loader.stringResult();
     69 }
     70 
     71 String FileReaderSync::readAsText(ScriptExecutionContext* scriptExecutionContext, Blob* blob, const String& encoding, ExceptionCode& ec)
     72 {
     73     if (!blob)
     74         return String();
     75 
     76     FileReaderLoader loader(FileReaderLoader::ReadAsText, 0);
     77     loader.setEncoding(encoding);
     78     startLoading(scriptExecutionContext, loader, blob, ec);
     79     return loader.stringResult();
     80 }
     81 
     82 String FileReaderSync::readAsDataURL(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionCode& ec)
     83 {
     84     if (!blob)
     85         return String();
     86 
     87     FileReaderLoader loader(FileReaderLoader::ReadAsDataURL, 0);
     88     loader.setDataType(blob->type());
     89     startLoading(scriptExecutionContext, loader, blob, ec);
     90     return loader.stringResult();
     91 }
     92 
     93 void FileReaderSync::startLoading(ScriptExecutionContext* scriptExecutionContext, FileReaderLoader& loader, Blob* blob, ExceptionCode& ec)
     94 {
     95     loader.start(scriptExecutionContext, blob);
     96     ec = FileException::ErrorCodeToExceptionCode(loader.errorCode());
     97 }
     98 
     99 } // namespace WebCore
    100 
    101 #endif // ENABLE(BLOB)
    102