Aegisub/core/subtitle_format_srt.cpp
2006-03-01 03:17:31 +00:00

229 lines
6.2 KiB
C++

// 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.
//
// 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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include "subtitle_format_srt.h"
#include "text_file_reader.h"
#include "text_file_writer.h"
#include "ass_dialogue.h"
#include "ass_file.h"
/////////////
// Can read?
bool SRTSubtitleFormat::CanReadFile(wxString filename) {
return (filename.Right(4).Lower() == _T(".srt"));
}
/////////////
// Read file
void SRTSubtitleFormat::ReadFile(wxString filename,wxString encoding) {
using namespace std;
// Reader
TextFileReader file(filename,encoding);
// Default
LoadDefault();
// Parse file
int linen = 1;
int fileLine = 0;
int mode = 0;
long templ;
AssDialogue *line = NULL;
while (file.HasMoreLines()) {
// Reads line
wxString curLine = file.ReadLineFromFile();
fileLine++;
switch (mode) {
case 0:
// Checks if there is anything to read
if (curLine.IsEmpty()) continue;
// Check if it's a line number
if (!curLine.IsNumber()) {
Clear();
throw wxString::Format(_T("Parse error on entry %i at line %i (expecting line number). Possible malformed file."),linen,fileLine);
}
// Read line number
curLine.ToLong(&templ);
if (templ != linen) {
linen = templ;
}
line = new AssDialogue();
mode = 1;
break;
case 1:
// Read timestamps
if (curLine.substr(13,3) != _T("-->")) {
Clear();
throw wxString::Format(_T("Parse error on entry %i at line %i (expecting timestamps). Possible malformed file."),linen,fileLine);
}
line->Start.ParseSRT(curLine.substr(0,12));
line->End.ParseSRT(curLine.substr(17,12));
mode = 2;
break;
case 2:
// Checks if it's done
if (curLine.IsEmpty()) {
mode = 0;
linen++;
line->group = _T("[Events]");
line->Style = _T("Default");
line->Comment = false;
line->UpdateData();
line->ParseSRTTags();
line->StartMS = line->Start.GetMS();
Line->push_back(line);
break;
}
// Append text
if (line->Text != _T("")) line->Text += _T("\\N");
line->Text += curLine;
break;
}
}
}
//////////////
// Can write?
bool SRTSubtitleFormat::CanWriteFile(wxString filename) {
return (filename.Right(4).Lower() == _T(".srt"));
}
//////////////
// Write file
void SRTSubtitleFormat::WriteFile(wxString _filename,wxString encoding) {
// Open file
TextFileWriter file(_filename,encoding);
// Convert to SRT
CreateCopy();
ConvertToSRT();
// Write lines
int i=1;
using std::list;
for (list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur++) {
AssDialogue *current = AssEntry::GetAsDialogue(*cur);
if (current) {
// Get line
if (current->Comment) throw _T("Unexpected line type (comment)");
// Write line
file.WriteLineToFile(wxString::Format(_T("%i"),i));
file.WriteLineToFile(current->Start.GetSRTFormated() + _T(" --> ") + current->End.GetSRTFormated());
file.WriteLineToFile(current->Text);
file.WriteLineToFile(_T(""));
i++;
}
else throw _T("Unexpected line type");
}
ClearCopy();
}
///////////////////////
// Convert line to SRT
void SRTSubtitleFormat::DialogueToSRT(AssDialogue *current,std::list<AssEntry*>::iterator prev) {
using std::list;
AssDialogue *previous;
if (prev != Line->end()) previous = AssEntry::GetAsDialogue(*prev);
else previous = NULL;
// Strip ASS tags
current->ConvertTagsToSRT();
// Join equal lines
if (previous != NULL) {
if (previous->Text == current->Text) {
if (abs(current->Start.GetMS() - previous->End.GetMS()) < 20) {
current->Start = (current->Start < previous->Start ? current->Start : previous->Start);
current->End = (current->End > previous->End ? current->End : previous->End);
delete *prev;
Line->erase(prev);
}
}
}
// Fix line breaks
current->Text.Replace(_T("\\n"),_T("\r\n"),true);
current->Text.Replace(_T("\\N"),_T("\r\n"),true);
current->Text.Replace(_T("\r\n\r\n"),_T("\r\n"),true);
}
//////////////////////////////
// Converts whole file to SRT
void SRTSubtitleFormat::ConvertToSRT () {
using std::list;
list<AssEntry*>::iterator next;
list<AssEntry*>::iterator prev = Line->end();
// Sort lines
Line->sort(LessByPointedToValue<AssEntry>());
// Process lines
bool notfirst = false;
for (list<AssEntry*>::iterator cur=Line->begin();cur!=Line->end();cur=next) {
next = cur;
next++;
// Dialogue line (not comment)
AssDialogue *current = AssEntry::GetAsDialogue(*cur);
if (current && !current->Comment) {
DialogueToSRT(current,prev);
notfirst = true;
prev = cur;
}
// Other line, delete it
else {
delete *cur;
Line->erase(cur);
}
}
}