整理した

src/client/app/desktop/views/directives/index.ts

@@ -0,0 +1,6 @@
+import Vue from 'vue';
+
+import userPreview from './user-preview';
+
+Vue.directive('userPreview', userPreview);
+Vue.directive('user-preview', userPreview);

src/client/app/desktop/views/directives/user-preview.ts

@@ -0,0 +1,72 @@
+/**
+ * マウスオーバーするとユーザーがプレビューされる要素を設定します
+ */
+
+import MkUserPreview from '../components/user-preview.vue';
+
+export default {
+	bind(el, binding, vn) {
+		const self = el._userPreviewDirective_ = {} as any;
+
+		self.user = binding.value;
+		self.tag = null;
+		self.showTimer = null;
+		self.hideTimer = null;
+
+		self.close = () => {
+			if (self.tag) {
+				self.tag.close();
+				self.tag = null;
+			}
+		};
+
+		const show = () => {
+			if (self.tag) return;
+
+			self.tag = new MkUserPreview({
+				parent: vn.context,
+				propsData: {
+					user: self.user
+				}
+			}).$mount();
+
+			const preview = self.tag.$el;
+			const rect = el.getBoundingClientRect();
+			const x = rect.left + el.offsetWidth + window.pageXOffset;
+			const y = rect.top + window.pageYOffset;
+
+			preview.style.top = y + 'px';
+			preview.style.left = x + 'px';
+
+			preview.addEventListener('mouseover', () => {
+				clearTimeout(self.hideTimer);
+			});
+
+			preview.addEventListener('mouseleave', () => {
+				clearTimeout(self.showTimer);
+				self.hideTimer = setTimeout(self.close, 500);
+			});
+
+			document.body.appendChild(preview);
+		};
+
+		el.addEventListener('mouseover', () => {
+			clearTimeout(self.showTimer);
+			clearTimeout(self.hideTimer);
+			self.showTimer = setTimeout(show, 500);
+		});
+
+		el.addEventListener('mouseleave', () => {
+			clearTimeout(self.showTimer);
+			clearTimeout(self.hideTimer);
+			self.hideTimer = setTimeout(self.close, 500);
+		});
+	},
+
+	unbind(el, binding, vn) {
+		const self = el._userPreviewDirective_;
+		clearTimeout(self.showTimer);
+		clearTimeout(self.hideTimer);
+		self.close();
+	}
+};