Source/core/fileapi/FileError.cpp

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#include "config.h"
#include "core/fileapi/FileError.h"

#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"

namespace blink {

const char FileError::abortErrorMessage[] = "An ongoing operation was aborted, typically with a call to abort().";
const char FileError::encodingErrorMessage[] = "A URI supplied to the API was malformed, or the resulting Data URL has exceeded the URL length limitations for Data URLs.";
const char FileError::invalidStateErrorMessage[] = "An operation that depends on state cached in an interface object was made but the state had changed since it was read from disk.";
const char FileError::noModificationAllowedErrorMessage[] = "An attempt was made to write to a file or directory which could not be modified due to the state of the underlying filesystem.";
const char FileError::notFoundErrorMessage[] = "A requested file or directory could not be found at the time an operation was processed.";
const char FileError::notReadableErrorMessage[] = "The requested file could not be read, typically due to permission problems that have occurred after a reference to a file was acquired.";
const char FileError::pathExistsErrorMessage[] = "An attempt was made to create a file or directory where an element already exists.";
const char FileError::quotaExceededErrorMessage[] = "The operation failed because it would cause the application to exceed its storage quota.";
const char FileError::securityErrorMessage[] = "It was determined that certain files are unsafe for access within a Web application, or that too many calls are being made on file resources.";
const char FileError::syntaxErrorMessage[] = "An invalid or unsupported argument was given, like an invalid line ending specifier.";
const char FileError::typeMismatchErrorMessage[] = "The path supplied exists, but was not an entry of requested type.";

namespace {

ExceptionCode errorCodeToExceptionCode(FileError::ErrorCode code)
{
    switch (code) {
    case FileError::OK:
        return 0;
    case FileError::NOT_FOUND_ERR:
        return NotFoundError;
    case FileError::SECURITY_ERR:
        return SecurityError;
    case FileError::ABORT_ERR:
        return AbortError;
    case FileError::NOT_READABLE_ERR:
        return NotReadableError;
    case FileError::ENCODING_ERR:
        return EncodingError;
    case FileError::NO_MODIFICATION_ALLOWED_ERR:
        return NoModificationAllowedError;
    case FileError::INVALID_STATE_ERR:
        return InvalidStateError;
    case FileError::SYNTAX_ERR:
        return SyntaxError;
    case FileError::INVALID_MODIFICATION_ERR:
        return InvalidModificationError;
    case FileError::QUOTA_EXCEEDED_ERR:
        return QuotaExceededError;
    case FileError::TYPE_MISMATCH_ERR:
        return TypeMismatchError;
    case FileError::PATH_EXISTS_ERR:
        return PathExistsError;
    default:
        ASSERT_NOT_REACHED();
        return code;
    }
}

const char* errorCodeToMessage(FileError::ErrorCode code)
{
    // Note that some of these do not set message. If message is 0 then the default message is used.
    switch (code) {
    case FileError::OK:
        return 0;
    case FileError::SECURITY_ERR:
        return FileError::securityErrorMessage;
    case FileError::NOT_FOUND_ERR:
        return FileError::notFoundErrorMessage;
    case FileError::ABORT_ERR:
        return FileError::abortErrorMessage;
    case FileError::NOT_READABLE_ERR:
        return FileError::notReadableErrorMessage;
    case FileError::ENCODING_ERR:
        return FileError::encodingErrorMessage;
    case FileError::NO_MODIFICATION_ALLOWED_ERR:
        return FileError::noModificationAllowedErrorMessage;
    case FileError::INVALID_STATE_ERR:
        return FileError::invalidStateErrorMessage;
    case FileError::SYNTAX_ERR:
        return FileError::syntaxErrorMessage;
    case FileError::INVALID_MODIFICATION_ERR:
        return 0;
    case FileError::QUOTA_EXCEEDED_ERR:
        return FileError::quotaExceededErrorMessage;
    case FileError::TYPE_MISMATCH_ERR:
        return 0;
    case FileError::PATH_EXISTS_ERR:
        return FileError::pathExistsErrorMessage;
    default:
        ASSERT_NOT_REACHED();
        return 0;
    }
}

} // namespace

void FileError::throwDOMException(ExceptionState& exceptionState, ErrorCode code)
{
    if (code == FileError::OK)
        return;

    // SecurityError is special-cased, as we want to route those exceptions through ExceptionState::throwSecurityError.
    if (code == FileError::SECURITY_ERR) {
        exceptionState.throwSecurityError(FileError::securityErrorMessage);
        return;
    }

    exceptionState.throwDOMException(errorCodeToExceptionCode(code), errorCodeToMessage(code));
}

FileError::FileError(ErrorCode code)
    : DOMError(DOMException::getErrorName(errorCodeToExceptionCode(code)), errorCodeToMessage(code))
    , m_code(code)
{
    ScriptWrappable::init(this);
}

} // namespace blink