Fix resizing of Live views with reduced size. (#1840)

Author: belucha

src/Spectre.Console/Live/LiveDisplayRenderer.cs

@@ -4,7 +4,6 @@ internal sealed class LiveDisplayRenderer : IRenderHook
 {
     private readonly IAnsiConsole _console;
     private readonly LiveDisplayContext _context;
-
     public LiveDisplayRenderer(IAnsiConsole console, LiveDisplayContext context)
     {
         _console = console;
@@ -45,7 +44,7 @@ public IEnumerable<IRenderable> Process(RenderOptions options, IEnumerable<IRend
     {
         lock (_context.Lock)
         {
-            yield return _context.Live.PositionCursor();
+            yield return _context.Live.PositionCursor(options);
 
             foreach (var renderable in renderables)
             {

src/Spectre.Console/Live/LiveRenderable.cs

@@ -39,7 +39,7 @@ public void SetRenderable(IRenderable? renderable)
         }
     }
 
-    public IRenderable PositionCursor()
+    public IRenderable PositionCursor(RenderOptions options)
     {
         lock (_lock)
         {
@@ -48,6 +48,14 @@ public IRenderable PositionCursor()
                 return new ControlCode(string.Empty);
             }
 
+            // Check if the size have been reduced
+            if (_shape.Value.Height > options.ConsoleSize.Height || _shape.Value.Width > options.ConsoleSize.Width)
+            {
+                // Important reset shape, so the size can shrink
+                _shape = null;
+                return new ControlCode(ED(2) + ED(3) + CUP(1, 1));
+            }
+
             var linesToMoveUp = _shape.Value.Height - 1;
             return new ControlCode("\r" + CUU(linesToMoveUp));
         }

src/Spectre.Console/Live/Progress/Renderers/DefaultProgressRenderer.cs

@@ -118,7 +118,7 @@ public override IEnumerable<IRenderable> Process(RenderOptions options, IEnumera
     {
         lock (_lock)
         {
-            yield return _live.PositionCursor();
+            yield return _live.PositionCursor(options);
 
             foreach (var renderable in renderables)
             {

src/Spectre.Console/Prompts/List/ListPromptRenderHook.cs

@@ -42,7 +42,7 @@ public IEnumerable<IRenderable> Process(RenderOptions options, IEnumerable<IRend
                 _dirty = false;
             }
 
-            yield return _live.PositionCursor();
+            yield return _live.PositionCursor(options);
 
             foreach (var renderable in renderables)
             {