SubtitleEdit/libse/MergeShortLinesUtils.cs

104 lines
3.4 KiB
C#
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using System;
namespace Nikse.SubtitleEdit.Core
{
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public static class MergeShortLinesUtils
{
public static Subtitle MergeShortLinesInSubtitle(Subtitle subtitle, double maxMillisecondsBetweenLines, int maxCharacters, bool onlyContinuousLines)
{
string language = LanguageAutoDetect.AutoDetectGoogleLanguage(subtitle);
var mergedSubtitle = new Subtitle();
bool lastMerged = false;
Paragraph p = null;
for (int i = 1; i < subtitle.Paragraphs.Count; i++)
{
if (!lastMerged)
{
p = new Paragraph(subtitle.GetParagraphOrDefault(i - 1));
mergedSubtitle.Paragraphs.Add(p);
}
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var next = subtitle.GetParagraphOrDefault(i);
if (next != null)
{
if (Utilities.QualifiesForMerge(p, next, maxMillisecondsBetweenLines, maxCharacters, onlyContinuousLines))
{
if (GetStartTag(p.Text) == GetStartTag(next.Text) &&
GetEndTag(p.Text) == GetEndTag(next.Text))
{
string s1 = p.Text.Trim();
s1 = s1.Substring(0, s1.Length - GetEndTag(s1).Length);
string s2 = next.Text.Trim();
s2 = s2.Substring(GetStartTag(s2).Length);
p.Text = Utilities.AutoBreakLine(s1 + Environment.NewLine + s2, language);
}
else
{
p.Text = Utilities.AutoBreakLine(p.Text + Environment.NewLine + next.Text, language);
}
p.EndTime = next.EndTime;
lastMerged = true;
}
else
{
lastMerged = false;
}
}
else
{
lastMerged = false;
}
}
if (!lastMerged)
{
mergedSubtitle.Paragraphs.Add(new Paragraph(subtitle.GetParagraphOrDefault(subtitle.Paragraphs.Count - 1)));
}
return mergedSubtitle;
}
public static string GetEndTag(string text)
{
if (string.IsNullOrEmpty(text))
{
return string.Empty;
}
text = text.Trim();
if (!text.EndsWith('>'))
{
return string.Empty;
}
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var endTag = string.Empty;
int start = text.LastIndexOf("</", StringComparison.Ordinal);
if (start > 0 && start >= text.Length - 8)
{
endTag = text.Substring(start);
}
return endTag;
}
public static string GetStartTag(string text)
{
if (string.IsNullOrEmpty(text))
{
return string.Empty;
}
text = text.Trim();
if (!text.StartsWith('<'))
{
return string.Empty;
}
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var startTag = string.Empty;
int end = text.IndexOf('>');
if (end > 0 && end < 25)
{
startTag = text.Substring(0, end + 1);
}
return startTag;
}
}
}