third_party/WebKit/Source/core/fileapi/FileReaderSync.cpp

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#include "core/fileapi/FileReaderSync.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/DOMArrayBuffer.h"
#include "core/fileapi/Blob.h"
#include "core/fileapi/FileError.h"
#include "core/fileapi/FileReaderLoader.h"

namespace blink {

FileReaderSync::FileReaderSync()
{
}

DOMArrayBuffer* FileReaderSync::readAsArrayBuffer(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
{
    ASSERT(blob);

    std::unique_ptr<FileReaderLoader> loader = FileReaderLoader::create(FileReaderLoader::ReadAsArrayBuffer, nullptr);
    startLoading(executionContext, *loader, *blob, exceptionState);

    return loader->arrayBufferResult();
}

String FileReaderSync::readAsBinaryString(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
{
    ASSERT(blob);

    std::unique_ptr<FileReaderLoader> loader = FileReaderLoader::create(FileReaderLoader::ReadAsBinaryString, nullptr);
    startLoading(executionContext, *loader, *blob, exceptionState);
    return loader->stringResult();
}

String FileReaderSync::readAsText(ExecutionContext* executionContext, Blob* blob, const String& encoding, ExceptionState& exceptionState)
{
    ASSERT(blob);

    std::unique_ptr<FileReaderLoader> loader = FileReaderLoader::create(FileReaderLoader::ReadAsText, nullptr);
    loader->setEncoding(encoding);
    startLoading(executionContext, *loader, *blob, exceptionState);
    return loader->stringResult();
}

String FileReaderSync::readAsDataURL(ExecutionContext* executionContext, Blob* blob, ExceptionState& exceptionState)
{
    ASSERT(blob);

    std::unique_ptr<FileReaderLoader> loader = FileReaderLoader::create(FileReaderLoader::ReadAsDataURL, nullptr);
    loader->setDataType(blob->type());
    startLoading(executionContext, *loader, *blob, exceptionState);
    return loader->stringResult();
}

void FileReaderSync::startLoading(ExecutionContext* executionContext, FileReaderLoader& loader, const Blob& blob, ExceptionState& exceptionState)
{
    loader.start(executionContext, blob.blobDataHandle());
    if (loader.errorCode())
        FileError::throwDOMException(exceptionState, loader.errorCode());
}

} // namespace blink