code_review: PR #1055

- since the author and time are already shown in the blame view, use the full message as tooltip is better.
- cache the commit message in `ViewModels.Blame` since the `Tooltip` of control may change.
- querying commit message synchronously (it's very fast) to avoid similar issues in commit details panel.

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

src/ViewModels/Blame.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System.Collections.Generic;
+using System.Threading.Tasks;
 
 using Avalonia.Threading;
 
@@ -57,12 +58,18 @@ namespace SourceGit.ViewModels
             }
         }
 
-        public Models.Commit GetCommitInfo(string commitSHA)
+        public string GetCommitMessage(string sha)
         {
-            return new Commands.QuerySingleCommit(_repo, commitSHA).Result();
+            if (_commitMessages.TryGetValue(sha, out var msg))
+                return msg;
+
+            msg = new Commands.QueryCommitFullMessage(_repo, sha).Result();
+            _commitMessages[sha] = msg;
+            return msg;
         }
 
         private readonly string _repo;
         private Models.BlameData _data = null;
+        private Dictionary<string, string> _commitMessages = new Dictionary<string, string>();
     }
 }

src/Views/Blame.axaml

@@ -2,7 +2,6 @@
                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-                    xmlns:m="using:SourceGit.Models"
                     xmlns:vm="using:SourceGit.ViewModels"
                     xmlns:v="using:SourceGit.Views"
                     mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
@@ -60,21 +59,7 @@
                          FontFamily="{DynamicResource Fonts.Monospace}"
                          FontSize="{Binding Source={x:Static vm:Preferences.Instance}, Path=EditorFontSize}"
                          TabWidth="{Binding Source={x:Static vm:Preferences.Instance}, Path=EditorTabWidth}"
-                         BlameData="{Binding Data}">
-        <v:BlameTextEditor.DataTemplates>
-          <DataTemplate DataType="m:Commit">
-            <StackPanel MinWidth="400" Orientation="Vertical">
-              <Grid ColumnDefinitions="Auto,*,Auto">
-                <v:Avatar Grid.Column="0" Width="16" Height="16" VerticalAlignment="Center" IsHitTestVisible="False" User="{Binding Author}"/>
-                <TextBlock Grid.Column="1" Classes="primary" Text="{Binding Author.Name}" Margin="8,0,0,0"/>
-                <TextBlock Grid.Column="2" Classes="primary" Text="{Binding CommitterTimeStr}" Foreground="{DynamicResource Brush.FG2}" Margin="8,0,0,0"/>
-              </Grid>
-
-              <TextBlock Classes="primary" Margin="0,8,0,0" Text="{Binding Subject}" TextWrapping="Wrap"/>
-            </StackPanel>
-          </DataTemplate>
-        </v:BlameTextEditor.DataTemplates>
-      </v:BlameTextEditor>
+                         BlameData="{Binding Data}"/>
 
       <!-- Not supported mask (for binary files) -->
       <StackPanel Orientation="Vertical"

src/Views/Blame.axaml.cs

@@ -1,13 +1,13 @@
 using System;
 using System.Collections.Generic;
 using System.Globalization;
-using System.Threading.Tasks;
+
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Media;
-using Avalonia.Threading;
+
 using AvaloniaEdit;
 using AvaloniaEdit.Document;
 using AvaloniaEdit.Editing;
@@ -162,8 +162,7 @@ namespace SourceGit.Views
                             break;
 
                         var info = _editor.BlameData.LineInfos[lineNumber - 1];
-                        var y = line.GetTextLineVisualYPosition(line.TextLines[0], VisualYPosition.TextTop)
-                                - view.VerticalOffset;
+                        var y = line.GetTextLineVisualYPosition(line.TextLines[0], VisualYPosition.TextTop) - view.VerticalOffset;
                         var shaLink = new FormattedText(
                             info.CommitSHA,
                             CultureInfo.CurrentCulture,
@@ -177,28 +176,11 @@ namespace SourceGit.Views
                         {
                             Cursor = Cursor.Parse("Hand");
 
-                            // check if the tooltip is already set
-                            var tooltip = ToolTip.GetTip(this);
-                            if (tooltip is Models.Commit existedCommit && existedCommit.SHA == info.CommitSHA)
-                                return;
-
                             if (DataContext is ViewModels.Blame blame)
                             {
-                                Task.Run(() =>
-                                {
-                                    var commit = blame.GetCommitInfo(info.CommitSHA);
-                                    if (commit == null)
-                                        return;
-
-                                    Dispatcher.UIThread.Invoke(() =>
-                                    {
-                                        if (IsEffectivelyVisible && IsPointerOver)
-                                        {
-                                            ToolTip.SetTip(this, commit);
-                                            ToolTip.SetIsOpen(this, true);
-                                        }
-                                    });
-                                });
+                                var msg = blame.GetCommitMessage(info.CommitSHA);
+                                ToolTip.SetTip(this, msg);
+                                ToolTip.SetIsOpen(this, true);
                             }
 
                             return;