Mouse!

mouse.ts

@@ -0,0 +1,88 @@
+import { WindowMouseEvent } from "https://deno.land/x/dwm@0.3.3/mod.ts";
+import { gameWindow } from "./window.ts";
+
+export const M = {
+	NONE: -1,
+	LEFT: 0,
+	RIGHT: 1,
+	MIDDLE: 2,
+}
+
+const mouseButtonsDown = {
+	[M.LEFT]: false,
+	[M.RIGHT]: false,
+	[M.MIDDLE]: false,
+};
+const mouseEvents: Array<{
+	type: "click" | "down" | "up" | "move",
+	button: typeof M[keyof typeof M],
+	x: number,
+	y: number,
+	prevX?: number,
+	prevY?: number
+}> = [];
+
+let mouseX = 0;
+let mouseY = 0;
+
+const eventPixelCoords = (evt: WindowMouseEvent) => {
+	const {width, height} = gameWindow.size;
+	const pixX = Math.floor(128*evt.clientX/width);
+	const pixY = Math.floor(128*evt.clientY/height);
+	return {
+		x: pixX,
+		y: pixY,
+	}
+}
+
+// addEventListener("dblclick", (evt) => {
+// 	console.log("dblclick", evt.button, evt.clientX, evt.clientY);
+// });
+
+addEventListener("click", (evt) => {
+	mouseEvents.push({type: "click", button: evt.button, ...eventPixelCoords(evt)});
+});
+
+addEventListener("mousedown", (evt) => {
+	mouseButtonsDown[evt.button] = true;
+	mouseEvents.push({type: "down", button: evt.button, ...eventPixelCoords(evt)});
+});
+
+addEventListener("mouseup", (evt) => {
+	mouseButtonsDown[evt.button] = false;
+	mouseEvents.push({type: "up", button: evt.button, ...eventPixelCoords(evt)});
+});
+
+addEventListener("mousemove", (evt) => {
+	const coords = eventPixelCoords(evt);
+	mouseEvents.push({type: "move", button: evt.button, ...eventPixelCoords(evt), prevX: mouseX, prevY: mouseY});
+	mouseX = coords.x;
+	mouseY = coords.y;
+});
+
+export const mousePos = () => {
+	return {
+		x: mouseX,
+		y: mouseY,
+	}
+}
+
+export const getMouseX = () => {
+	return mouseX;
+}
+
+export const getMouseY = () => {
+	return mouseY;
+}
+
+export const refreshMouse = () => {
+	mouseEvents.length = 0;
+}
+
+export const mouseClick = (button: number = M.LEFT) => {
+	return mouseEvents.some(ev => ev.button === button && ev.type === "click");
+}
+
+export const mouseHeld = (button: number = M.LEFT) => {
+	return mouseButtonsDown[button];
+}