RW - use net472 and caching for much faster work.

RightWords/Data/Test-1.restext

@@ -0,0 +1,68 @@
+= SkipPattern works =
+
+zz words with digits: 8zz zz zz8zz zz zz8 zz
+zz "zz:\zz\zz zz" zz "zz:/zz/zz zz" zz
+zz "Z:\zz\zz zz" zz "Z:/zz/zz zz" zz
+zz ".\zz\zz zz" zz "./zz/zz zz" zz
+zz "\zz\zz zz" zz "/zz/zz zz" zz
+zz zz:\zz\zz zz zz:/zz/zz zz
+zz Z:\zz\zz zz Z:/zz/zz zz
+zz .\zz\zz zz ./zz/zz zz
+zz \zz\zz zz /zz/zz zz
+
+= SkipPattern does not work =
+
+_zz_zz_
+
+= Misc =
+
+12345 головомошка favorit
+!"£$% голmove favorit
+ежик ёжик
+
+	_rightRigth_ _rigthRight_ _правильноПравилно_ _правилноПравильно_
+	IRightRigth IRigthRight ПравильноПравилно ПравилноПравильно
+	rightRigth rigthRight правильноПравилно правилноПравильно
+
+= With ampersand =
+
+Ampe&rsand
+
+= Long line =
+
+										головомошка favorit 1										головомошка favorit 2						головомошка favorit 3						головомошка favorit 4						головомошка favorit 5
+
+= Уже в словарях =
+
+nightroman
+Кузьмин
+
+* plugin ~ pin
+* plugin   plugins     Plugin   Plugins
+
+* плагин ~ камин
+* ед.число мн.число    заглавные
+И плагин   плагины     Плагин   Плагины
+Р плагина  плагинов    Плагина  Плагинов
+Д плагину  плагинам    Плагину  Плагинам
+В плагин   плагины     Плагин   Плагины
+Т плагином плагинами   Плагином Плагинами
+П плагине  плагинах    Плагине  Плагинах
+
+опциональная
+
++ exabyte petabyte terabyte Exabytes Petabytes Terabytes
+
++ Artifact Artifacts | Artifacted (fact | act)
++ artifact artifacts | artifacted (fact | act)
+
++ Catalog Catalogs Catalogged
++ catalog catalogs catalogged
+
++ Discoverability Discoverabilities
++ discoverability discoverabilities
+
+- dialog dialogs | dialogged
+
+- Color Colors Colored? | Colorred?
+- color colors colored? | colorred?

RightWords/Data/Test-2.lng

@@ -0,0 +1,10 @@
+
+"M&an"
+"Ma&n"
+"Man&"
+"&Man"
+
+"M&anz"
+"Ma&nz"
+"Man&z"
+"Manz&"

RightWords/Highlighter.cs

@@ -14,29 +14,103 @@ public class Highlighter : ModuleDrawer
 	{
 		readonly MultiSpell Spell = MultiSpell.Get();
 		readonly HashSet<string> CommonWords = Actor.GetCommonWords();
+
+		/// <summary>
+		/// Last checked line data cache.
+		/// </summary>
+		LineData[] LastData = Array.Empty<LineData>();
+
+		/// <summary>
+		/// Line text and color spans.
+		/// </summary>
+		class LineData
+		{
+			public string Text;
+			public ValueTuple<int, int>[] Spans;
+		}
+
+		/// <summary>
+		/// Finds the cached data by the line hint index and text.
+		/// </summary>
+		LineData FindLineData(int index, string text)
+		{
+			// if the frame is not changed (arrows without scrolling or typing in the same line)
+			// then many not changed lines are in the same positions, check the hint index first
+			if (index < LastData.Length)
+			{
+				if (LastData[index]?.Text == text)
+					return LastData[index];
+			}
+
+			// on scrolling or typing many lines shift positions, find from the hint index
+			for (int i = 1; ; ++i)
+			{
+				int j = index - i;
+				int k = index + i;
+				bool ok1 = j >= 0 && j < LastData.Length;
+				bool ok2 = k >= 0 && k < LastData.Length;
+				if (!ok1 && !ok2)
+					break;
+				if (ok1 && LastData[j]?.Text == text)
+					return LastData[j];
+				if (ok2 && LastData[k]?.Text == text)
+					return LastData[k];
+			}
+
+			return null;
+		}
+
 		public override void Invoke(IEditor editor, ModuleDrawerEventArgs e)
 		{
-			var sets = Settings.Default.GetData();
+			var settings = Settings.Default.GetData();
 
+			int topLineIndex = e.Lines[0].Index;
+			var newData = new LineData[e.Lines.Count];
+
+			int newDataIndex = -1;
+			var lineSpans = new List<ValueTuple<int, int>>();
 			foreach (var line in e.Lines)
 			{
+				++newDataIndex;
 				var text = line.Text;
 				if (text.Length == 0)
 					continue;
 
-				if (sets.MaximumLineLength > 0 && text.Length > sets.MaximumLineLength)
+				// rare case: too long line, color the whole line
+				if (settings.MaximumLineLength > 0 && text.Length > settings.MaximumLineLength)
 				{
 					e.Colors.Add(new EditorColor(
 						line.Index,
 						0,
 						text.Length,
-						sets.HighlightingForegroundColor,
-						sets.HighlightingBackgroundColor));
+						settings.HighlightingForegroundColor,
+						settings.HighlightingBackgroundColor));
 					continue;
 				}
 
+				// try get the cached line data
+				var data = FindLineData(line.Index - topLineIndex, text);
+				if (data != null)
+				{
+					// keep it as new and add colors
+					newData[newDataIndex] = data;
+					if (data.Spans != null)
+					{
+						foreach (var item in data.Spans)
+							e.Colors.Add(new EditorColor(
+								line.Index,
+								item.Item1,
+								item.Item2,
+								settings.HighlightingForegroundColor,
+								settings.HighlightingBackgroundColor));
+					}
+					continue;
+				}
+
+				// parse and check words, collect color spans
+				lineSpans.Clear();
 				MatchCollection skip = null;
-				for (var match = sets.WordRegex2.Match(text); match.Success; match = match.NextMatch())
+				for (var match = settings.WordRegex2.Match(text); match.Success; match = match.NextMatch())
 				{
 					// the target word
 					var word = Actor.MatchToWord(match);
@@ -50,18 +124,34 @@ public override void Invoke(IEditor editor, ModuleDrawerEventArgs e)
 						continue;
 
 					// expensive skip pattern
-					if (Actor.HasMatch(skip ?? (skip = Actor.GetMatches(sets.SkipRegex2, text)), match))
+					if (Actor.HasMatch(skip ?? (skip = Actor.GetMatches(settings.SkipRegex2, text)), match))
 						continue;
 
-					// add color
-					e.Colors.Add(new EditorColor(
-						line.Index,
-						match.Index,
-						match.Index + match.Length,
-						sets.HighlightingForegroundColor,
-						sets.HighlightingBackgroundColor));
+					// add the span
+					lineSpans.Add((match.Index, match.Index + match.Length));
+				}
+
+				// cache the data and add colors if any
+				if (lineSpans.Count == 0)
+				{
+					newData[newDataIndex] = new LineData { Text = text };
+				}
+				else
+				{
+					newData[newDataIndex] = new LineData { Text = text, Spans = lineSpans.ToArray() };
+
+					foreach (var span in lineSpans)
+						e.Colors.Add(new EditorColor(
+							line.Index,
+							span.Item1,
+							span.Item2,
+							settings.HighlightingForegroundColor,
+							settings.HighlightingBackgroundColor));
 				}
 			}
+
+			// update cache
+			LastData = newData;
 		}
 	}
 }

RightWords/History.txt

@@ -1,5 +1,10 @@
 https://www.nuget.org/packages/FarNet.RightWords
 
+= 2.5.0 =
+
+Requires net472.
+Use caching for much faster processing.
+
 = 2.4.0 =
 
 Requires FarNet 5.6.0.

RightWords/LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2011-2021 Roman Kuzmin
+Copyright (c) 2011-2022 Roman Kuzmin
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

RightWords/RightWords.csproj

@@ -4,7 +4,7 @@
     <MyOutDir>$(FarHome)\FarNet\Modules\$(AssemblyName)</MyOutDir>
   </PropertyGroup>
   <PropertyGroup>
-    <TargetFramework>net45</TargetFramework>
+    <TargetFramework>net472</TargetFramework>
     <RunPostBuildEvent>1</RunPostBuildEvent>
     <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>

RightWords/TheTool.cs

@@ -10,8 +10,6 @@ public class TheTool : ModuleTool
 	{
 		public override void Invoke(object sender, ModuleToolEventArgs e)
 		{
-			if (e == null) return;
-
 			var menu = Far.Api.CreateMenu();
 			menu.Title = Settings.ModuleName;
 			menu.HelpTopic = Far.Api.GetHelpTopic("main-menu");