code_review: PR #1177

- use `Command.ReadToEnd` instead of `Command.Exec` to avoid git trims line endings.
- use `StringBuilder.Append('\n')` instead of `StringBuilder.AppendLine()` to restore original line endings (we split the original diff output by `\n` not `\r')
- there's no need to show file content (the `StreamReader.ReadLine()` will trim line endings)

Signed-off-by: leo <longshuang@msn.cn>

src/Commands/Diff.cs

@@ -35,7 +35,26 @@ namespace SourceGit.Commands
 
         public Models.DiffResult Result()
         {
-            Exec();
+            var rs = ReadToEnd();
+            if (!rs.IsSuccess)
+            {
+                _result.TextDiff = null;
+                return _result;
+            }
+
+            var start = 0;
+            var end = rs.StdOut.IndexOf('\n', start);
+            while (end > 0)
+            {
+                var line = rs.StdOut.Substring(start, end - start);
+                ParseLine(line);
+
+                start = end + 1;
+                end = rs.StdOut.IndexOf('\n', start);
+            }
+
+            if (start < rs.StdOut.Length)
+                ParseLine(rs.StdOut.Substring(start));
 
             if (_result.IsBinary || _result.IsLFS)
             {
@@ -54,8 +73,11 @@ namespace SourceGit.Commands
             return _result;
         }
 
-        protected override void OnReadline(string line)
+        private void ParseLine(string line)
         {
+            if (_result.IsBinary)
+                return;
+
             if (line.StartsWith("old mode ", StringComparison.Ordinal))
             {
                 _result.OldMode = line.Substring(9);
@@ -80,9 +102,6 @@ namespace SourceGit.Commands
                 return;
             }
 
-            if (_result.IsBinary)
-                return;
-
             if (_result.IsLFS)
             {
                 var ch = line[0];

src/ViewModels/DiffContext.cs

@@ -207,50 +207,7 @@ namespace SourceGit.ViewModels
                 }
                 else
                 {
-                    // Check if old and new hashes differ but no text changes found
+                    rs = new Models.NoOrEOLChange();
-                    if (!string.IsNullOrEmpty(latest.OldHash) &&
-                        !string.IsNullOrEmpty(latest.NewHash) && 
-                        latest.OldHash != latest.NewHash)
-                    {
-                        // If hashes differ but no text diff found, it's likely an EOL change
-                        // Create a text diff to show the file content
-                        var textDiff = new Models.TextDiff()
-                        {
-                            Repo = _repo,
-                            Option = _option,
-                            File = _option.Path
-                        };
-                        // Query the file content to show
-                        var fileContent = Commands.QueryFileContent.Run(_repo, "HEAD", _option.Path);
-                        using var reader = new StreamReader(fileContent);
-                        var line = string.Empty;
-                        int lineNumber = 1;
-                        
-                        while ((line = reader.ReadLine()) != null)
-                        {
-                            textDiff.Lines.Add(new Models.TextDiffLine(
-                                Models.TextDiffLineType.Normal, 
-                                line, 
-                                lineNumber, 
-                                lineNumber));
-                            
-                            lineNumber++;
-                        }
-                        
-                        if (textDiff.Lines.Count > 0)
-                        {
-                            textDiff.MaxLineNumber = lineNumber - 1;
-                            rs = textDiff;
-                        }
-                        else
-                        {
-                            rs = new Models.NoOrEOLChange();
-                        }
-                    }
-                    else
-                    {
-                        rs = new Models.NoOrEOLChange();
-                    }
                 }
 
                 Dispatcher.UIThread.Post(() =>

src/Views/TextDiffView.axaml.cs

@@ -1253,11 +1253,12 @@ namespace SourceGit.Views
                     {
                         builder.Append(line.Content.Substring(0, 1000));
                         builder.Append($"...({line.Content.Length - 1000} character trimmed)");
-                        builder.AppendLine();
+                        builder.Append('\n');
                     }
                     else
                     {
-                        builder.AppendLine(line.Content);
+                        builder.Append(line.Content);
+                        builder.Append('\n');
                     }
                 }
 
@@ -1492,11 +1493,12 @@ namespace SourceGit.Views
                     {
                         builder.Append(line.Content.Substring(0, 1000));
                         builder.Append($"...({line.Content.Length - 1000} characters trimmed)");
-                        builder.AppendLine();
+                        builder.Append('\n');
                     }
                     else
                     {
-                        builder.AppendLine(line.Content);
+                        builder.Append(line.Content);
+                        builder.Append('\n');
                     }
                 }