Aegisub/aegisub/src/subtitle_format_ass.cpp

// Copyright (c) 2006, Rodrigo Braz Monteiro
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// Aegisub Project http://www.aegisub.org/

/// @file subtitle_format_ass.cpp
/// @brief Reading/writing of SSA-lineage subtitles
/// @ingroup subtitle_io
///

#include "config.h"

#include "subtitle_format_ass.h"

#include "ass_file.h"
#include "ass_parser.h"
#include "compat.h"
#include "text_file_reader.h"
#include "text_file_writer.h"
#include "version.h"

DEFINE_SIMPLE_EXCEPTION(AssParseError, SubtitleFormatParseError, "subtitle_io/parse/ass")

AssSubtitleFormat::AssSubtitleFormat()
: SubtitleFormat("Advanced Substation Alpha")
{
}

wxArrayString AssSubtitleFormat::GetReadWildcards() const {
	wxArrayString formats;
	formats.Add("ass");
	formats.Add("ssa");
	return formats;
}

wxArrayString AssSubtitleFormat::GetWriteWildcards() const {
	wxArrayString formats;
	formats.Add("ass");
	formats.Add("ssa");
	return formats;
}

void AssSubtitleFormat::ReadFile(AssFile *target, wxString const& filename, wxString const& encoding) const {
	target->Clear();

	TextFileReader file(filename, encoding);
	int version = filename.Right(4).Lower() != ".ssa";
	AssParser parser(target, version);

	while (file.HasMoreLines()) {
		wxString line = file.ReadLineFromFile();
		try {
			parser.AddLine(line);
		}
		catch (const char *err) {
			target->Clear();
			throw AssParseError("Error processing line: " + STD_STR(line) + ": " + err, 0);
		}
	}
}

void AssSubtitleFormat::WriteFile(const AssFile *src, wxString const& filename, wxString const& encoding) const {
	TextFileWriter file(filename, encoding);

	file.WriteLineToFile(wxString("Script generated by Aegisub ") + GetAegisubLongVersionString());
	file.WriteLineToFile("http://www.aegisub.org/");

	bool ssa = filename.Right(4).Lower() == ".ssa";

	wxString group = src->Line.front().group;
	for (auto const& line : src->Line) {
		// Add a blank line between each group
		if (line.group != group) {
			file.WriteLineToFile("");
			group = line.group;
		}

		file.WriteLineToFile(ssa ? line.GetSSAText() : line.GetEntryData(), true);
	}
}