initial commit

src/lib/ui/Canvas.hx

@@ -0,0 +1,74 @@
+package lib.ui;
+
+import util.Vec.Vec2;
+import kernel.ui.TermBuffer.Pixel;
+
+abstract Canvas(Array<Array<Pixel>>) to Array<Array<Pixel>> {
+	inline public function new() {
+		this = [[]];
+	}
+
+	public inline function set(i:Vec2<Int>,pixel:Pixel) {
+		if (this[i.y] == null){
+			this[i.y] = [];
+		}
+
+		this[i.y][i.x] = pixel;
+	}
+
+	public inline function get(i:Vec2<Int>): Pixel {
+		return this[i.y][i.x];
+	}
+
+	public function keyValueIterator(): KeyValueIterator<Vec2<Int>,Pixel>{
+		return new CanvasKeyValueIterator(this);
+	}
+
+	public function combine(other: Canvas,offset: Vec2<Int>) {
+		for (key => value in other) {
+			if (value == null){
+				continue;
+			}
+
+			var y = offset.y + key.y;
+			var x = offset.x + key.x;
+			
+			if (this[y] == null){
+				this[y] = [];
+			}
+
+			this[y][x] = value;
+		}
+	}
+}
+
+class CanvasKeyValueIterator{
+	private final canvas:Array<Array<Pixel>>;
+	private var index:Vec2<Int> = {x: 0,y: 0};
+
+	@:allow(lib.ui.Canvas)
+	private function new(canvas: Array<Array<Pixel>>) {
+		this.canvas = canvas;
+	}
+
+	public function hasNext():Bool{
+		return index.y < canvas.length && index.x < canvas[index.y].length;
+	}
+
+	public function next():{key:Vec2<Int>, value:Pixel}{
+		var oldIndex: Vec2<Int> = this.index;
+
+		if (index.x >= canvas[index.y].length){
+			// Goto next line
+			index = {x:0,y: index.y + 1};
+		}else{
+			// Goto next pixel in line
+			index = {x:index.x + 1,y: index.y};
+		}
+
+		return {
+			key: oldIndex,
+			value: this.canvas[oldIndex.y][oldIndex.x]
+		};
+	}
+}

src/lib/ui/IElement.hx

@@ -0,0 +1,7 @@
+package lib.ui;
+
+import util.Vec.Vec2;
+
+interface IElement {
+    public function render(bounds: Vec2<Int>): Canvas;
+}

src/lib/ui/ReactiveUI.hx

@@ -0,0 +1,80 @@
+package lib.ui;
+
+import kernel.Log;
+import util.Color;
+import util.Vec.Vec2;
+import kernel.ui.WindowContext;
+
+class ReactiveUI {
+	private final context:WindowContext;
+	
+	public function new(context: WindowContext) {
+		this.context = context;
+	}
+
+	public function render(children: Array<IElement>) {
+		var size = context.getSize();
+
+		var screen = renderChildren(children,size);
+
+		writeToContext(screen);
+	}
+
+	private function writeToContext(screen: Canvas) {
+		var currentBg: Color = Black;
+		var currentFg: Color = White;
+
+		var currentLine = 0;
+
+		context.setBackgroundColor(currentBg);
+		context.setTextColor(currentFg);
+		context.setCursorPos(0,0);
+
+		for (key => pixel in screen) {
+
+			if (key.y != currentLine){
+				currentLine = key.y;
+				context.setCursorPos(key.x,key.y);
+			}
+
+			if (pixel == null){
+				context.write(' ');
+			}else{
+				if (pixel.bg != currentBg){
+					context.setBackgroundColor(pixel.bg);
+					currentBg = pixel.bg;
+				}
+
+				if (pixel.textColor != currentFg){
+					context.setTextColor(pixel.textColor);
+					currentFg = pixel.textColor;
+				}
+
+				context.write(pixel.char);
+			}
+		}
+	}
+
+	public static function renderChildren(children: Array<IElement>,bounds: Vec2<Int>): Canvas {
+		var rtn: Canvas = new Canvas();
+
+		var writePoint: Vec2<Int> = {x: 0,y: 0};
+
+		for (child in children) {
+			if (bounds.y - writePoint.y <= 0){
+				// No more space to render children
+				Log.debug("No more space");
+				break;
+			}
+
+			var childRender = child.render({
+				x: bounds.x,
+				y: bounds.y - writePoint.y
+			});
+
+			rtn.combine(childRender,writePoint);
+		}
+
+		return rtn;
+	}
+}

src/lib/ui/TextElement.hx

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+package lib.ui;
+
+import kernel.Log;
+import util.Color;
+import util.Vec.Vec2;
+import util.MathI;
+
+class TextElement implements IElement {
+    private final text:String;
+    private final bg:Color;
+    private final fg:Color;
+
+    public function new(text: String,?background: Color = Black,?textColor: Color = White) {
+        this.text = text;
+        this.bg = background;
+        this.fg = textColor;
+    }
+
+	public function render(bounds: Vec2<Int>):Canvas {
+		var rtn = new Canvas();
+
+        for (i in 0...MathI.min(Math.floor(text.length / bounds.x) + 1,bounds.y)){
+			var line = (text.substr(i * bounds.x,bounds.x));
+            for (char in 0...line.length) {
+                rtn.set({x: char,y: i},{textColor: fg,char: line.charAt(char),bg: bg});
+            }
+		}
+
+        return rtn;
+	}
+}

src/lib/ui/VSplitLayout.hx

@@ -0,0 +1,18 @@
+package lib.ui;
+
+import util.Vec.Vec2;
+import kernel.ui.TermBuffer.Pixel;
+
+class VSplitLayout implements IElement{
+    
+    public function new(childrenLeft: Array<IElement>,childrenRight: Array<IElement>) {
+        
+    }
+
+	public function render(bounds:Vec2<Int>):Canvas {
+		var boundsLeft: Vec2<Int> = { x: Math.ceil(bounds.x / 2), y: bounds.y};
+		var boundsRight: Vec2<Int> = { x: Math.floor(bounds.x / 2), y: bounds.y};
+		
+		return null;
+	}
+}