Aegisub/src/text_file_writer.cpp

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// Copyright (c) 2013, Thomas Goyne <plorkyeran@aegisub.org>
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//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
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//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
// Aegisub Project http://www.aegisub.org/
/// @file text_file_writer.cpp
/// @brief Write plain text files line by line
/// @ingroup utility
///
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#include "text_file_writer.h"
#include "options.h"
#include <libaegisub/io.h>
#include <libaegisub/charset_conv.h>
#include <libaegisub/make_unique.h>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/filesystem.hpp>
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#ifdef _WIN32
#define NEWLINE "\r\n"
#else
#define NEWLINE "\n"
#endif
TextFileWriter::TextFileWriter(agi::fs::path const& filename, std::string encoding)
: file(new agi::io::Save(filename, true))
, newline(NEWLINE)
{
if (encoding.empty())
encoding = OPT_GET("App/Save Charset")->GetString();
if (boost::iequals(encoding, "utf-8")) {
conv = agi::make_unique<agi::charset::IconvWrapper>("utf-8", encoding.c_str(), true);
newline = conv->Convert(newline);
}
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try {
// Write the BOM
WriteLineToFile("\xEF\xBB\xBF", false);
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}
catch (agi::charset::ConversionFailure&) {
// If the BOM could not be converted to the target encoding it isn't needed
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}
}
TextFileWriter::~TextFileWriter() {
// Explicit empty destructor required with a unique_ptr to an incomplete class
}
void TextFileWriter::WriteLineToFile(std::string const& line, bool addLineBreak) {
if (conv) {
auto converted = conv->Convert(line);
file->Get().write(converted.data(), converted.size());
}
else
file->Get().write(line.data(), line.size());
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if (addLineBreak)
file->Get().write(newline.data(), newline.size());
}