✨ Custom directive for long-press events (#586)

src/directives/LongPress.js

@@ -0,0 +1,51 @@
+/**
+ * A Vue directive to call event when element is long-pressed
+ * Used to open context menus on touch-enabled devices
+ * Inspired by: FeliciousX/vue-directive-long-press
+ * Dashy: Licensed under MIT - (C) Alicia Sykes 2022
+ */
+
+const LONG_PRESS_DEFAULT_DELAY = 750;
+const longPressEvent = new CustomEvent('long-press');
+
+export default {
+  bind(element, binding, vnode) {
+    const el = element;
+    el.dataset.longPressTimeout = null;
+
+    const swallowClick = (e) => {
+      el.removeEventListener('click', swallowClick);
+      if (!el.dataset.elapsed) return true;
+      e.preventDefault();
+      e.stopPropagation();
+      return false;
+    };
+
+    const complete = () => {
+      if (vnode.componentInstance) vnode.componentInstance.$emit('long-press');
+      else el.dispatchEvent(longPressEvent);
+      el.dataset.elapsed = true;
+    };
+
+    const onPointerUp = () => {
+      clearTimeout(parseInt(el.dataset.longPressTimeout, 10));
+      document.removeEventListener('pointerup', onPointerUp);
+    };
+
+    const onPointerDown = () => {
+      document.addEventListener('pointerup', onPointerUp);
+      el.addEventListener('click', swallowClick);
+      const timeoutDuration = binding.value || LONG_PRESS_DEFAULT_DELAY;
+      const timeout = setTimeout(complete, timeoutDuration);
+      el.dataset.elapsed = false;
+      el.dataset.longPressTimeout = timeout;
+    };
+
+    el.$longPressHandler = onPointerDown;
+    el.addEventListener('pointerdown', onPointerDown);
+  },
+  unbind(el) {
+    clearTimeout(parseInt(el.dataset.longPressTimeout, 10));
+    el.removeEventListener('pointerdown', el.$longPressHandler);
+  },
+};