gui: split GUI into Terminal components

1 files changed, 46 insertions, 0 deletions

diff --git a/Scripts/Terminal/OutputArea.cs b/Scripts/Terminal/OutputArea.cs
new file mode 100644
index 0000000..6de4ac1
--- /dev/null
+++ b/Scripts/Terminal/OutputArea.cs
@@ -0,0 +1,46 @@
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using Godot;
+using Godot.Collections;
+using Texty.Scripts.Game;
+
+namespace Texty.Scripts.Terminal
+{
+    public class OutputArea : ScrollContainer
+    {
+        [Export(PropertyHint.File, "*.tscn")] public PackedScene OutputBlockScene;
+        public Array<string> TextBlocks => new Array<string>(BlockNodes.ToList().Select(block => block.Content));
+
+        private VBoxContainer LineContainer => GetNodeOrNull<VBoxContainer>($"%{nameof(LineContainer)}");
+
+        private IEnumerable<OutputBlock> BlockNodes =>
+            GD.Range(LineContainer?.GetChildCount() ?? 0)
+                .Select(index => LineContainer.GetChild(index))
+                .Cast<OutputBlock>();
+
+        public override void _Ready()
+        {
+            Debug.Assert(OutputBlockScene != null, "OutputBlockScene has not been configured!");
+            Debug.Assert(OutputBlockScene.CanInstance(), "OutputBlockScene can not be instanced!");
+            Clear();
+        }
+
+        public void Clear()
+        {
+            BlockNodes.ToList().ForEach(block =>
+            {
+                LineContainer.RemoveChild(block);
+                block.QueueFree();
+            });
+        }
+
+        public void Push(string text)
+        {
+            if (text.Empty()) return;
+            var block = OutputBlockScene.Instance<OutputBlock>();
+            block.Content = text;
+            LineContainer.AddChild(block);
+        }
+    }
+}
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