Aegisub/aegisub/src/subtitle_format_transtation.cpp
Thomas Goyne 4ec507f814 Clean up SubtitleFormat
Document all of the SubtitleFormat methods.

Add default implementations of CanReadFile and CanWriteFile that check
against the appropriate wildcard list.

Clean up and simplify a lot of very odd code.

Throw typed exceptions in all subtitle readers rather than strings.

Originally committed to SVN as r5617.
2011-09-28 19:44:53 +00:00

137 lines
4.6 KiB
C++

// Copyright (c) 2007, 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.
//
// 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 A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
//
// $Id$
/// @file subtitle_format_transtation.cpp
/// @brief Reading/writing Transtation-compatible subtitles
/// @ingroup subtitle_io
///
#include "config.h"
#ifndef AGI_PRE
#include <stdio.h>
#endif
#include "subtitle_format_transtation.h"
#include "ass_dialogue.h"
#include "ass_file.h"
#include "ass_style.h"
#include "ass_time.h"
#include "text_file_writer.h"
TranStationSubtitleFormat::TranStationSubtitleFormat()
: SubtitleFormat("TranStation")
{
}
wxArrayString TranStationSubtitleFormat::GetWriteWildcards() const {
wxArrayString formats;
formats.Add("transtation.txt");
return formats;
}
void TranStationSubtitleFormat::WriteFile(wxString const& filename, wxString const& encoding) {
FPSRational fps_rat = AskForFPS(true);
if (fps_rat.num <= 0 || fps_rat.den <= 0) return;
TextFileWriter file(filename, encoding);
// Convert to TranStation
CreateCopy();
SortLines();
StripComments();
RecombineOverlaps();
MergeIdentical();
AssDialogue *prev = 0;
for (std::list<AssEntry*>::iterator it = Line->begin(); it != Line->end(); ++it) {
AssDialogue *cur = dynamic_cast<AssDialogue*>(*it);
if (prev && cur) {
file.WriteLineToFile(ConvertLine(prev, &fps_rat, cur->Start.GetMS()));
file.WriteLineToFile("");
}
if (cur)
prev = cur;
}
// flush last line
if (prev)
file.WriteLineToFile(ConvertLine(prev, &fps_rat, -1));
// Every file must end with this line
file.WriteLineToFile("SUB[");
ClearCopy();
}
wxString TranStationSubtitleFormat::ConvertLine(AssDialogue *current, FPSRational *fps_rat, int nextl_start) {
int valign = 0;
const char *halign = " "; // default is centered
const char *type = "N"; // no special style
if (AssStyle *style = GetAssFile()->GetStyle(current->Style)) {
if (style->alignment >= 4) valign = 4;
if (style->alignment >= 7) valign = 9;
if (style->alignment == 1 || style->alignment == 4 || style->alignment == 7) halign = "L";
if (style->alignment == 3 || style->alignment == 6 || style->alignment == 9) halign = "R";
if (style->italic) type = "I";
}
// Hack: If an italics-tag (\i1) appears anywhere in the line,
// make it all italics
if (current->Text.Find("\\i1") != wxNOT_FOUND) type = "I";
// Write header
AssTime start = current->Start;
AssTime end = current->End;
// Subtract one frame if the end time of the current line is equal to the
// start of next one, since the end timestamp is inclusive and the lines
// would overlap if left as is.
if (nextl_start > 0 && end.GetMS() == nextl_start)
end.SetMS(end.GetMS() - ((1000*fps_rat->den)/fps_rat->num));
FractionalTime ft(":", fps_rat->num, fps_rat->den, fps_rat->smpte_dropframe);
wxString header = wxString::Format("SUB[%i%s%s ", valign, halign, type) + ft.FromAssTime(start) + ">" + ft.FromAssTime(end) + "]\r\n";
// Process text
wxString lineEnd = "\r\n";
current->StripTags();
current->Text.Replace("\\h", " ", true);
current->Text.Replace("\\n", lineEnd, true);
current->Text.Replace("\\N", lineEnd, true);
while (current->Text.Replace(lineEnd + lineEnd, lineEnd, true));
return header + current->Text;
}