Work on WebVTT

src/libse/Common/WebVttHelper.cs

@@ -5,6 +5,7 @@ using System.Globalization;
 using System.Linq;
 using System.Text;
 using System.Text.RegularExpressions;
+using Nikse.SubtitleEdit.Core.SubtitleFormats;
 
 namespace Nikse.SubtitleEdit.Core.Common
 {
@@ -454,5 +455,58 @@ namespace Nikse.SubtitleEdit.Core.Common
 
             return text;
         }
+
+        public static List<string> GetParagraphStyles(Paragraph paragraph)
+        {
+            var list = new List<string>();
+            if (paragraph == null || string.IsNullOrEmpty(paragraph.Text))
+            {
+                return list;
+            }
+
+            var regex = new Regex(@"<c\.[\.a-zA-Z\d#_-]+>");
+            foreach (Match match in regex.Matches(paragraph.Text))
+            {
+                var styles = match.Value.Remove(0, 3).Trim('>', ' ').Split('.');
+                foreach (var styleName in styles)
+                {
+                    if (!string.IsNullOrEmpty(styleName) && !list.Contains(styleName))
+                    {
+                        list.Add("." + styleName);
+                    }
+                }
+            }
+
+            return list;
+        }
+
+        public static string SetParagraphStyles(Paragraph p, List<WebVttStyle> styles)
+        {
+            if (string.IsNullOrEmpty(p.Text) || 
+                !p.Text.Contains("<c.", StringComparison.Ordinal))
+            {
+                return p.Text;
+            }
+
+            var text = p.Text;
+            var regex = new Regex(@"<c\.[\.a-zA-Z\d#_-]+>");
+            var match = regex.Match(text);
+            while (match.Success)
+            {
+                text = text.Remove(match.Index, match.Value.Length);
+                match = regex.Match(text);
+            }
+
+            text = text.Replace("</c>", string.Empty);
+
+            if (styles.Count == 0)
+            {
+                return text;
+            }
+
+            var prefix = "<c" + string.Join("", styles.Select(s=>s.Name)) +">";
+
+            return prefix + text + "</c>";
+        }
     }
 }

src/ui/Forms/Main.cs

@@ -33003,6 +33003,11 @@ namespace Nikse.SubtitleEdit.Forms
                 toolStripButtonAssAttachments.Visible = true;
             }
 
+            if (formatType == typeof(AdvancedSubStationAlpha) || formatType == typeof(SubStationAlpha))
+            {
+                TryLoadIcon(toolStripButtonAssStyleManager, "AssaStyle");
+            }
+
             toolStripButtonXProperties.Visible = formatType == typeof(ItunesTimedText);
             if (toolStripButtonXProperties.Visible)
             {
@@ -35223,8 +35228,20 @@ namespace Nikse.SubtitleEdit.Forms
             var styles = WebVttHelper.GetStyles(_subtitle.Header);
             using (var form = new WebVttStylePicker(styles, _subtitle.GetParagraphOrDefault(idx)))
             {
-                form.ShowDialog(this);
-            }
+                if (form.ShowDialog(this) != DialogResult.OK)
+                {
+                    return;
+                }
+
+                foreach (int index in SubtitleListview1.SelectedIndices)
+                {
+                    var p = _subtitle.Paragraphs[index];
+                    p.Text = WebVttHelper.SetParagraphStyles(p, form.ImportExportStyles);
+                    SubtitleListview1.SetText(index, p.Text);
+                }
+            }
+
+            RefreshSelectedParagraph();
         }
     }
 }

src/ui/Forms/VTT/WebVttStylePicker.cs

@@ -8,20 +8,20 @@ namespace Nikse.SubtitleEdit.Forms.VTT
 {
     public sealed partial class WebVttStylePicker : Form
     {
-        private readonly List<WebVttStyle> _styles;
         public List<WebVttStyle> ImportExportStyles { get; set; }
 
-        public WebVttStylePicker(List<WebVttStyle> styles, Paragraph getParagraphOrDefault)
+        public WebVttStylePicker(List<WebVttStyle> styles, Paragraph paragraph)
         {
             InitializeComponent();
             UiUtil.FixFonts(this);
 
             ImportExportStyles = new List<WebVttStyle>();
-            _styles = styles;
             listViewExportStyles.Columns[0].Width = listViewExportStyles.Width - 20;
-            foreach (var style in _styles)
+
+            var paragraphStyles = WebVttHelper.GetParagraphStyles(paragraph);
+            foreach (var style in styles)
             {
-                listViewExportStyles.Items.Add(new ListViewItem(style.Name) { Checked = true, Tag = style });
+                listViewExportStyles.Items.Add(new ListViewItem(style.Name) { Checked = paragraphStyles.Contains(style.Name), Tag = style });
             }
 
             Text = LanguageSettings.Current.SubStationAlphaStyles.Export;
@@ -41,6 +41,8 @@ namespace Nikse.SubtitleEdit.Forms.VTT
                     ImportExportStyles.Add((WebVttStyle)item.Tag);
                 }
             }
+
+            DialogResult = ImportExportStyles.Count == 0 ? DialogResult.Cancel : DialogResult.OK;
         }
 
         private void WebVttImportExport_KeyDown(object sender, KeyEventArgs e)

src/ui/Logic/FindReplaceDialogHelper.cs

@@ -99,10 +99,7 @@ namespace Nikse.SubtitleEdit.Logic
                 {
                     _regEx = new Regex(FindText, RegexOptions.None, TimeSpan.FromSeconds(5));
                 }
-                else
-                {
 
-                }
                 match = _regEx.Match(text, startIndex);
             }
             catch (RegexMatchTimeoutException exception)