Add configurable log overview marker bar

AGENTS.md

@@ -0,0 +1,14 @@
+# Repository instructions
+
+Before inspecting or changing this repository, read [.github\CLAUDE.md](CLAUDE.md), [CONTEXT.md](CONTEXT.md) and
+[.github\copilot-instructions.md](copilot-instructions.md) in full. All three files apply to every coding agent, including Codex.
+They are the authoritative repository instructions; this file is an entry point,
+not a replacement or summary. Follow their links whenever the stated conditions apply.
+
+If either file is missing, unreadable, or truncated, resolve that before changing files.
+After context compaction, reload either document if its complete instructions are no
+longer available. Re-read a document when it changes during the task.
+
+Before editing C#, read the applicable `.editorconfig` and neighboring handwritten
+code. Before declaring work complete, perform the evidence-based standards review
+required by CLAUDE.md.

src/CsvColumnizer/CsvColumnizer.cs

@@ -17,7 +17,7 @@ namespace CsvColumnizer;
 /// The IPreProcessColumnizer is implemented to read field names from the very first line of the file. Then
 /// the line is dropped. So it's not seen by LogExpert. The field names will be used as column names.
 /// </summary>
-public class CsvColumnizer : ILogLineMemoryColumnizer, IInitColumnizerMemory, IColumnizerConfiguratorMemory, IPreProcessColumnizerMemory, IColumnizerPriorityMemory
+public class CsvColumnizer : ILogLineMemoryColumnizer, IInitColumnizerMemory, IColumnizerConfiguratorMemory, IPreProcessColumnizerMemory, IColumnizerPriorityMemory, ICloneable
 {
     #region Fields
 
@@ -220,6 +220,35 @@ public void DeSelected (ILogLineMemoryColumnizerCallback callback)
         // nothing to do
     }
 
+    public object Clone ()
+    {
+        CsvColumnizerConfig config = new()
+        {
+            CommentChar = _config.CommentChar,
+            DelimiterChar = _config.DelimiterChar,
+            EscapeChar = _config.EscapeChar,
+            HasFieldNames = _config.HasFieldNames,
+            MinColumns = _config.MinColumns,
+            QuoteChar = _config.QuoteChar,
+            VersionBuild = _config.VersionBuild
+        };
+        config.ConfigureReaderConfiguration();
+
+        CsvColumnizer clone = new()
+        {
+            _config = config,
+            _isValidCsv = _isValidCsv,
+            _firstLine = _firstLine == null ? null : new CsvLogLine(_firstLine.FullLine.ToString(), _firstLine.LineNumber)
+        };
+
+        foreach (var column in _columnList)
+        {
+            clone._columnList.Add(new CsvColumn(column.Name));
+        }
+
+        return clone;
+    }
+
     public void Configure (ILogLineMemoryColumnizerCallback callback, string configDir)
     {
         var configPath = configDir + "\\" + CONFIGFILENAME;

src/Log4jXmlColumnizer/Log4jXmlColumnizer.cs

@@ -11,7 +11,7 @@
 [assembly: SupportedOSPlatform("windows")]
 namespace Log4jXmlColumnizer;
 
-public class Log4jXmlColumnizer : ILogLineMemoryXmlColumnizer, IColumnizerConfiguratorMemory, IColumnizerPriorityMemory
+public class Log4jXmlColumnizer : ILogLineMemoryXmlColumnizer, IColumnizerConfiguratorMemory, IColumnizerPriorityMemory, ICloneable
 {
     #region Fields
 
@@ -278,6 +278,24 @@ public void LoadConfig (string configDir)
         }
     }
 
+    public object Clone ()
+    {
+        Log4jXmlColumnizer clone = new()
+        {
+            _config = new Log4jXmlColumnizerConfig(GetAllColumnNames())
+            {
+                LocalTimestamps = _config.LocalTimestamps,
+                ColumnList = [.. _config.ColumnList.Select(entry => new Log4jColumnEntry(entry.ColumnName, entry.ColumnIndex, entry.MaxLen)
+                {
+                    Visible = entry.Visible
+                })]
+            },
+            _timeOffset = _timeOffset
+        };
+
+        return clone;
+    }
+
     public Priority GetPriority (string fileName, IEnumerable<ILogLineMemory> samples)
     {
         ArgumentNullException.ThrowIfNull(fileName);

src/LogExpert.Core/Classes/Bookmark/BookmarkDataProvider.cs

@@ -85,6 +85,14 @@ public int GetBookmarkIndexForLine (int lineNum)
         }
     }
 
+    public int[] GetBookmarkLineNumbers ()
+    {
+        lock (_bookmarkListLock)
+        {
+            return [.. BookmarkList.Keys];
+        }
+    }
+
     public Entities.Bookmark GetBookmarkForLine (int lineNum)
     {
         lock (_bookmarkListLock)
@@ -148,19 +156,22 @@ public bool ConvertToManualBookmark (int lineNum)
 
     public void ShiftBookmarks (int offset)
     {
-        SortedList<int, Entities.Bookmark> newBookmarkList = [];
-
-        foreach (var bookmark in BookmarkList.Values)
+        lock (_bookmarkListLock)
         {
-            var line = bookmark.LineNum - offset;
-            if (line >= 0)
+            SortedList<int, Entities.Bookmark> newBookmarkList = [];
+
+            foreach (var bookmark in BookmarkList.Values)
             {
-                bookmark.LineNum = line;
-                newBookmarkList.Add(line, bookmark);
+                var line = bookmark.LineNum - offset;
+                if (line >= 0)
+                {
+                    bookmark.LineNum = line;
+                    newBookmarkList.Add(line, bookmark);
+                }
             }
-        }
 
-        BookmarkList = newBookmarkList;
+            BookmarkList = newBookmarkList;
+        }
     }
 
     public int FindPrevBookmarkIndex (int lineNum)

src/LogExpert.Core/Classes/Marker/MarkerBucket.cs

@@ -0,0 +1,54 @@
+namespace LogExpert.Core.Classes.Marker;
+
+/// <summary>A populated vertical pixel, including its logical range and navigation target.</summary>
+public readonly record struct MarkerBucket (int Pixel, int FirstLine, int LastLine, int Count, int TargetLine, int ColorArgb)
+{
+    /// <summary>Aggregates a line-ordered index without sampling; duplicate lines count only once.</summary>
+    public static IReadOnlyList<MarkerBucket> Aggregate (IEnumerable<MarkerLine> matches, int lineCount, int height)
+    {
+        ArgumentNullException.ThrowIfNull(matches);
+        if (lineCount <= 0 || height <= 0)
+        {
+            return [];
+        }
+
+        var buckets = new MarkerBucket[height];
+        var priorities = new int[height];
+        Array.Fill(priorities, int.MaxValue);
+        var previousLine = -1;
+        foreach (var match in matches)
+        {
+            var line = match.LineNumber;
+            if (line < 0 || line >= lineCount)
+            {
+                continue;
+            }
+
+            var pixel = lineCount == 1 ? 0 : (int)((long)line * (height - 1) / (lineCount - 1));
+            var bucket = buckets[pixel];
+            var first = height == 1 ? 0 : (int)(((long)pixel * (lineCount - 1) + height - 2) / (height - 1));
+            var last = height == 1 || pixel == height - 1 || lineCount == 1 ? lineCount - 1
+                : (int)(((long)(pixel + 1) * (lineCount - 1) + height - 2) / (height - 1)) - 1;
+            var target = bucket.Count == 0 ? line : bucket.TargetLine;
+            var distance = Math.Abs(2L * line - first - last);
+            var targetDistance = Math.Abs(2L * target - first - last);
+            if (distance < targetDistance || (distance == targetDistance && line < target))
+            {
+                target = line;
+            }
+
+            var color = bucket.ColorArgb;
+            if (match.Priority < priorities[pixel])
+            {
+                priorities[pixel] = match.Priority;
+                color = match.ColorArgb;
+            }
+
+            buckets[pixel] = new MarkerBucket(pixel, first, last,
+                bucket.Count + (line == previousLine ? 0 : 1), target, color);
+            previousLine = line;
+        }
+
+        return buckets.Where(bucket => bucket.Count > 0).ToArray();
+    }
+}

src/LogExpert.Core/Classes/Marker/MarkerCriteria.cs

@@ -0,0 +1,118 @@
+using System.Drawing;
+
+using ColumnizerLib;
+
+using LogExpert.Core.Classes.Highlight;
+using LogExpert.Core.Entities;
+
+namespace LogExpert.Core.Classes.Marker;
+
+/// <summary>Snapshot of the matching and visual portions of marker criteria. Never invokes triggers.</summary>
+public sealed class MarkerCriteria
+{
+    private readonly HighlightEntry[] _entries;
+    private HighlightEntry? _search;
+
+    public bool IsEmpty => _search == null && !_entries.Any(IsVisual);
+
+    private MarkerCriteria (HighlightEntry[] entries)
+    {
+        _entries = entries;
+    }
+
+    public static MarkerCriteria ForHighlights (IEnumerable<HighlightEntry> entries)
+    {
+        ArgumentNullException.ThrowIfNull(entries);
+        return new MarkerCriteria(entries.Select(entry => (HighlightEntry)entry.Clone()).ToArray());
+    }
+
+    public static MarkerCriteria ForSearch (SearchParams search, int colorArgb)
+    {
+        ArgumentNullException.ThrowIfNull(search);
+        return new MarkerCriteria([])
+        {
+            _search = string.IsNullOrEmpty(search.SearchText) ? null : new HighlightEntry
+            {
+                SearchText = search.SearchText,
+                IsRegex = search.IsRegex,
+                IsCaseSensitive = search.IsCaseSensitive,
+                BackgroundColor = Color.FromArgb(colorArgb)
+            }
+        };
+    }
+
+    public MarkerLine? Match (int lineNumber, ILogLineMemory line,
+        Func<int, ILogLineMemory, IReadOnlyList<ITextValueMemory>>? getColumns = null,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(line);
+        cancellationToken.ThrowIfCancellationRequested();
+        if (_search != null)
+        {
+            var matched = _search.IsRegex
+                ? _search.Regex.IsMatch(line.FullLine.Span)
+                : line.FullLine.Span.Contains(_search.SearchText,
+                    _search.IsCaseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase);
+            return matched ? new MarkerLine(lineNumber, _search.BackgroundColor.ToArgb()) : null;
+        }
+
+        IReadOnlyList<ITextValueMemory>? columns = null;
+        for (var priority = 0; priority < _entries.Length; priority++)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+            var entry = _entries[priority];
+            var background = (!entry.IsWordMatch || !entry.NoBackground) && entry.BackgroundColor.A > 0;
+            if (!IsVisual(entry))
+            {
+                continue;
+            }
+
+            bool matched;
+            if (entry.IsWordMatch)
+            {
+                columns ??= getColumns?.Invoke(lineNumber, line)
+                    ?? [new Column { FullValue = line.FullLine }];
+                matched = columns.Any(column => HasVisibleWordMatch(entry, column));
+            }
+            else
+            {
+                matched = HighlightEvaluator.IsMatch(entry, line);
+                if (!matched)
+                {
+                    columns ??= getColumns?.Invoke(lineNumber, line)
+                        ?? [new Column { FullValue = line.FullLine }];
+                    matched = columns.Any(column => HighlightEvaluator.IsMatch(entry, column));
+                }
+            }
+
+            if (matched)
+            {
+                var color = background ? entry.BackgroundColor
+                    : entry.ForegroundColor.A > 0 ? entry.ForegroundColor : Color.Gray;
+                return new MarkerLine(lineNumber, color.ToArgb(), priority);
+            }
+        }
+
+        return null;
+    }
+
+    private static bool IsVisual (HighlightEntry entry)
+    {
+        return !entry.IsSearchHit && (((!entry.IsWordMatch || !entry.NoBackground) && entry.BackgroundColor.A > 0)
+            || entry.ForegroundColor.A > 0 || entry.IsBold);
+    }
+
+    private static bool HasVisibleWordMatch (HighlightEntry entry, ITextValueMemory column)
+    {
+        // Word highlighting uses Regex even for literal text, against each displayed column.
+        foreach (var match in entry.Regex.EnumerateMatches(column.Text.Span))
+        {
+            if (match.Length > 0)
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}