1 files changed, 57 insertions, 0 deletions
diff --git a/client/lib/mouse.js b/client/lib/mouse.js
new file mode 100644
index 0000000..b4fa961
--- /dev/null
+++ b/client/lib/mouse.js
@@ -0,0 +1,57 @@
+/*
+
+mouse.register({
+  down: (x, y) => {
+  },
+  move: (x, y, dx, dy) => {
+  },
+  up: (x, y) => {
+  },
+})
+
+*/
+
+
+let fns = {
+  down: [],
+  move: [],
+  up: [],
+}
+
+export default {
+  register: (callbacks) => {
+    callbacks.down && fns.down.push(callbacks.down)
+    callbacks.move && fns.move.push(callbacks.move)
+    callbacks.up && fns.up.push(callbacks.up)
+  }
+}
+
+let x, y, dragging = false
+
+function down(e){
+  x = e.pageX
+  y = e.pageY
+  dragging = true
+  fns.down.map(f => f(x, y))
+}
+function move(e){
+  if (!dragging) return
+  let dx = e.pageX - x
+  let dy = e.pageY - y
+  x = e.pageX
+  y = e.pageY
+  dragging = true
+  fns.move.map(f => f(x, y, dx, dy))
+}
+function up(e){
+  dragging = false
+  fns.up.map(f => f(x, y))
+}
+
+function touch(f){ return (e) => f(e.touches[0]) }
+document.body.addEventListener("mousedown", down)
+document.body.addEventListener("mousemove", move)
+document.body.addEventListener("mouseup", up)
+document.body.addEventListener("touchstart", touch(down))
+document.body.addEventListener("touchmove", touch(move))
+document.body.addEventListener("touchup", touch(up))