feature: Expand Entire File button in diff area

src/Commands/Diff.cs

@@ -8,6 +8,9 @@ public partial class Diff : Command
     {
         [GeneratedRegex(@"^@@ \-(\d+),?\d* \+(\d+),?\d* @@")]
         private static partial Regex REG_INDICATOR();
+        // NOTE: Git documentation doesn't explicitly tell the max value for "unified" property.
+        // We're assuming that a Diff File couldn't be more than 4000 for each change.
+        public  const int MaxDiffUnified = 4000;
         private const string PREFIX_LFS_NEW = "+version https://git-lfs.github.com/spec/";
         private const string PREFIX_LFS_DEL = "-version https://git-lfs.github.com/spec/";
         private const string PREFIX_LFS_MODIFY = " version https://git-lfs.github.com/spec/";

src/Converters/IntConverters.cs

@@ -8,9 +8,6 @@ public static class IntConverters
         public static readonly FuncValueConverter<int, bool> IsGreaterThanZero =
             new FuncValueConverter<int, bool>(v => v > 0);
 
-        public static readonly FuncValueConverter<int, bool> IsGreaterThanFour =
-            new FuncValueConverter<int, bool>(v => v > 4);
-
         public static readonly FuncValueConverter<int, bool> IsZero =
             new FuncValueConverter<int, bool>(v => v == 0);
 

src/Resources/Icons.axaml

@@ -61,6 +61,7 @@
   <StreamGeometry x:Key="Icons.LFS">M40 9 15 23 15 31 9 28 9 20 34 5 24 0 0 14 0 34 25 48 25 28 49 14zM26 29 26 48 49 34 49 15z</StreamGeometry>
   <StreamGeometry x:Key="Icons.Lines.Incr">M408 232C408 210 426 192 448 192h416a40 40 0 110 80H448a40 40 0 01-40-40zM408 512c0-22 18-40 40-40h416a40 40 0 110 80H448A40 40 0 01408 512zM448 752A40 40 0 00448 832h416a40 40 0 100-80H448zM32 480l132 0 0-128 64 0 0 128 132 0 0 64-132 0 0 128-64 0 0-128-132 0Z</StreamGeometry>
   <StreamGeometry x:Key="Icons.Lines.Decr">M408 232C408 210 426 192 448 192h416a40 40 0 110 80H448a40 40 0 01-40-40zM408 512c0-22 18-40 40-40h416a40 40 0 110 80H448A40 40 0 01408 512zM448 752A40 40 0 00448 832h416a40 40 0 100-80H448zM32 480l328 0 0 64-328 0Z</StreamGeometry>
+  <StreamGeometry x:Key="Icons.Lines.Expand">m-1567.5 40c0-22 18-40 40-40h416a40 40 0 1 1 0 80h-416a40 40 0 0 1-40-40zm0 280c0-22 18-40 40-40h416a40 40 0 1 1 0 80h-416a40 40 0 0 1-40-40zm40 240a40 40 0 0 0 0 80h416a40 40 0 1 0 0-80zm-245.79-550.23c-6.4625 0-12.925 3.3537-16.279 10.061l-58.443 116.89c-7.4789 14.958 3.3978 32.557 20.121 32.557h14.505v301.45h-14.505c-16.723 0-27.6 17.599-20.121 32.557l58.443 116.89c6.7071 13.414 25.85 13.414 32.557 0l58.442-116.89c7.4789-14.958-3.3978-32.557-20.121-32.557h-14.504v-301.45h14.504c16.723-2e-5 27.6-17.599 20.121-32.557l-58.442-116.89c-3.3535-6.7072-9.8161-10.061-16.279-10.061z</StreamGeometry>
   <StreamGeometry x:Key="Icons.Link">M 968 418 l -95 94 c -59 59 -146 71 -218 37 L 874 331 a 64 64 0 0 0 0 -90 L 783 150 a 64 64 0 0 0 -90 0 L 475 368 c -34 -71 -22 -159 37 -218 l 94 -94 c 75 -75 196 -75 271 0 l 90 90 c 75 75 75 196 0 271 z M 332 693 a 64 64 0 0 1 0 -90 l 271 -271 c 25 -25 65 -25 90 0 s 25 65 0 90 L 422 693 a 64 64 0 0 1 -90 0 z M 151 783 l 90 90 a 64 64 0 0 0 90 0 l 218 -218 c 34 71 22 159 -37 218 l -86 94 a 192 192 0 0 1 -271 0 l -98 -98 a 192 192 0 0 1 0 -271 l 94 -86 c 59 -59 146 -71 218 -37 L 151 693 a 64 64 0 0 0 0 90 z</StreamGeometry>
   <StreamGeometry x:Key="Icons.List">M0 33h1024v160H0zM0 432h1024v160H0zM0 831h1024v160H0z</StreamGeometry>
   <StreamGeometry x:Key="Icons.Loading">M512 0C233 0 7 223 0 500C6 258 190 64 416 64c230 0 416 200 416 448c0 53 43 96 96 96s96-43 96-96c0-283-229-512-512-512zm0 1023c279 0 505-223 512-500c-6 242-190 436-416 436c-230 0-416-200-416-448c0-53-43-96-96-96s-96 43-96 96c0 283 229 512 512 512z</StreamGeometry>

src/Resources/Locales/de_DE.axaml

@@ -209,6 +209,7 @@
   <x:String x:Key="Text.Diff.UseMerger" xml:space="preserve">Öffne in Merge Tool</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Decr" xml:space="preserve">Weniger Zeilen anzeigen</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Incr" xml:space="preserve">Mehr Zeilen anzeigen</x:String>
+  <x:String x:Key="Text.Diff.VisualLines.Expand" xml:space="preserve">Gesamte Datei anzeigen</x:String>
   <x:String x:Key="Text.Diff.Welcome" xml:space="preserve">WÄHLE EINE DATEI AUS UM ÄNDERUNGEN ANZUZEIGEN</x:String>
   <x:String x:Key="Text.Diff.ShowHiddenSymbols" xml:space="preserve">Zeige versteckte Symbole</x:String>
   <x:String x:Key="Text.Diff.SwapCommits" xml:space="preserve">Seiten wechseln</x:String>

src/Resources/Locales/en_US.axaml

@@ -208,6 +208,7 @@
   <x:String x:Key="Text.Diff.UseMerger" xml:space="preserve">Open in Merge Tool</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Decr" xml:space="preserve">Decrease Number of Visible Lines</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Incr" xml:space="preserve">Increase Number of Visible Lines</x:String>
+  <x:String x:Key="Text.Diff.VisualLines.Expand" xml:space="preserve">Visualize the Entire File</x:String>
   <x:String x:Key="Text.Diff.Welcome" xml:space="preserve">SELECT FILE TO VIEW CHANGES</x:String>
   <x:String x:Key="Text.Diff.ShowHiddenSymbols" xml:space="preserve">Show hidden symbols</x:String>
   <x:String x:Key="Text.Diff.SwapCommits" xml:space="preserve">Swap</x:String>

src/Resources/Locales/pt_BR.axaml

@@ -205,6 +205,7 @@
   <x:String x:Key="Text.Diff.UseMerger" xml:space="preserve">Abrir na Ferramenta de Mesclagem</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Decr" xml:space="preserve">Diminuir Número de Linhas Visíveis</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Incr" xml:space="preserve">Aumentar Número de Linhas Visíveis</x:String>
+  <x:String x:Key="Text.Diff.VisualLines.Expand" xml:space="preserve">Visualizar Todo o Arquivo</x:String>
   <x:String x:Key="Text.Diff.Welcome" xml:space="preserve">SELECIONE O ARQUIVO PARA VISUALIZAR AS MUDANÇAS</x:String>
   <x:String x:Key="Text.Diff.ShowHiddenSymbols" xml:space="preserve">Mostrar símbolos ocultos</x:String>
   <x:String x:Key="Text.Diff.SwapCommits" xml:space="preserve">Trocar</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -211,6 +211,7 @@
   <x:String x:Key="Text.Diff.UseMerger" xml:space="preserve">使用外部合并工具查看</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Decr" xml:space="preserve">减少可见的行数</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Incr" xml:space="preserve">增加可见的行数</x:String>
+  <x:String x:Key="Text.Diff.VisualLines.Expand" xml:space="preserve">可视化整个文件</x:String>
   <x:String x:Key="Text.Diff.Welcome" xml:space="preserve">请选择需要对比的文件</x:String>
   <x:String x:Key="Text.Diff.ShowHiddenSymbols" xml:space="preserve">显示隐藏符号</x:String>
   <x:String x:Key="Text.Diff.SwapCommits" xml:space="preserve">交换比对双方</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -211,6 +211,7 @@
   <x:String x:Key="Text.Diff.UseMerger" xml:space="preserve">使用外部合併工具檢視</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Decr" xml:space="preserve">減少可見的行數</x:String>
   <x:String x:Key="Text.Diff.VisualLines.Incr" xml:space="preserve">增加可見的行數</x:String>
+  <x:String x:Key="Text.Diff.VisualLines.Expand" xml:space="preserve">可視化整個文件</x:String>
   <x:String x:Key="Text.Diff.Welcome" xml:space="preserve">請選擇需要對比的檔案</x:String>
   <x:String x:Key="Text.Diff.ShowHiddenSymbols" xml:space="preserve">顯示隱藏符號</x:String>
   <x:String x:Key="Text.Diff.SwapCommits" xml:space="preserve">交換比對雙方</x:String>

src/ViewModels/DiffContext.cs

@@ -7,6 +7,7 @@
 using Avalonia.Threading;
 
 using CommunityToolkit.Mvvm.ComponentModel;
+using SourceGit.Commands;
 
 namespace SourceGit.ViewModels
 {
@@ -40,6 +41,45 @@ public object Content
             get => _content;
             private set => SetProperty(ref _content, value);
         }
+
+        public bool IsIncUnifiedEnabled
+        {
+            get
+            {
+                return _isIncUnifiedEnabled;
+            }
+            private set
+            {
+                SetProperty(ref _isIncUnifiedEnabled, value && !_expandEntireFile);
+            }
+        }
+
+        public bool IsDecUnifiedEnabled
+        {
+            get
+            {
+                return _isDecUnifiedEnabled;
+            }
+            private set
+            {
+                SetProperty(ref _isDecUnifiedEnabled, value && _unifiedLines > 4 && !_expandEntireFile );
+            }
+        }
+
+        public bool ExpandEntireFile
+        {
+            get
+            {
+                return _expandEntireFile;
+            }
+            set
+            {
+                _expandEntireFile = value;
+                IsIncUnifiedEnabled = !_expandEntireFile;
+                IsDecUnifiedEnabled = !_expandEntireFile;
+                LoadDiffContent();
+            }
+        }
 
         public int UnifiedLines
         {
@@ -70,12 +110,14 @@ public DiffContext(string repo, Models.DiffOption option, DiffContext previous =
         public void IncrUnified()
         {
             UnifiedLines = _unifiedLines + 1;
+            IsDecUnifiedEnabled = UnifiedLines >= 4;
             LoadDiffContent();
         }
 
         public void DecrUnified()
         {
             UnifiedLines = Math.Max(4, _unifiedLines - 1);
+            IsDecUnifiedEnabled = UnifiedLines >= 4;
             LoadDiffContent();
         }
 
@@ -96,9 +138,10 @@ private void LoadDiffContent()
                 return;
             }
 
+            var unified = _expandEntireFile ? Diff.MaxDiffUnified : _unifiedLines;
             Task.Run(() =>
             {
-                var latest = new Commands.Diff(_repo, _option, _unifiedLines).Result();
+                var latest = new Commands.Diff(_repo, _option, unified).Result();
                 var rs = null as object;
 
                 if (latest.TextDiff != null)
@@ -230,11 +273,14 @@ private Models.RevisionSubmodule QuerySubmoduleRevision(string repo, string sha)
             ".ico", ".bmp", ".jpg", ".png", ".jpeg", ".webp"
         };
 
+        private bool _isIncUnifiedEnabled = true;
+        private bool _isDecUnifiedEnabled = false;
         private readonly string _repo;
         private readonly Models.DiffOption _option = null;
         private string _title;
         private string _fileModeChange = string.Empty;
         private int _unifiedLines = 4;
+        private bool _expandEntireFile = false;
         private bool _isLoading = true;
         private bool _isTextDiff = false;
         private object _content = null;

src/Views/DiffView.axaml

@@ -38,7 +38,8 @@
                     Width="32" 
                     Command="{Binding IncrUnified}" 
                     IsVisible="{Binding IsTextDiff}"
-                    ToolTip.Tip="{DynamicResource Text.Diff.VisualLines.Incr}">
+                    ToolTip.Tip="{DynamicResource Text.Diff.VisualLines.Incr}"
+                    IsEnabled="{Binding IsIncUnifiedEnabled}">
               <Path Width="12" Height="12" Stretch="Uniform" Margin="0,6,0,0" Data="{StaticResource Icons.Lines.Incr}"/>
             </Button>
 
@@ -47,10 +48,20 @@
                     Command="{Binding DecrUnified}" 
                     IsVisible="{Binding IsTextDiff}" 
                     ToolTip.Tip="{DynamicResource Text.Diff.VisualLines.Decr}" 
-                    IsEnabled="{Binding UnifiedLines, Converter={x:Static c:IntConverters.IsGreaterThanFour}}">
+                    IsEnabled="{Binding IsDecUnifiedEnabled}">
               <Path Width="12" Height="12" Stretch="Uniform" Margin="0,6,0,0" Data="{StaticResource Icons.Lines.Decr}"/>
             </Button>
 
+            <ToggleButton Classes="line_path"
+                          Width="32" Height="18"
+                          Background="Transparent"
+                          Padding="9,6"
+                          IsChecked="{Binding ExpandEntireFile}"
+                          IsVisible="{Binding IsTextDiff}"
+                          ToolTip.Tip="{DynamicResource Text.Diff.VisualLines.Expand}">
+              <Path Width="13" Height="13" Data="{StaticResource Icons.Lines.Expand}" Margin="0,3,0,0"/>
+            </ToggleButton>
+
             <ToggleButton Classes="line_path"
                           Width="32" Height="18"
                           Background="Transparent"