Adds menu for adding + managing node templates

web/extensions/core/nodeTemplates.js

+import { app } from "/scripts/app.js";
+import { ComfyDialog, $el } from "/scripts/ui.js";
+
+// Adds the ability to save and add multiple nodes as a template
+// To save:
+// Select multiple nodes (ctrl + drag to select a region or ctrl+click individual nodes)
+// Right click the canvas
+// Save Node Template -> give it a name
+//
+// To add:
+// Right click the canvas
+// Node templates -> click the one to add
+//
+// To delete/rename:
+// Right click the canvas
+// Node templates -> Manage
+
+const id = "Comfy.NodeTemplates";
+
+class ManageTemplates extends ComfyDialog {
+	constructor() {
+		super();
+		this.element.classList.add("comfy-manage-templates");
+		this.templates = this.load();
+	}
+
+	createButtons() {
+		const btns = super.createButtons();
+		btns[0].textContent = "Cancel";
+		btns.unshift(
+			$el("button", {
+				type: "button",
+				textContent: "Save",
+				onclick: () => this.save(),
+			})
+		);
+		return btns;
+	}
+
+	load() {
+		const templates = localStorage.getItem(id);
+		if (templates) {
+			return JSON.parse(templates);
+		} else {
+			return [];
+		}
+	}
+
+	save() {
+		// Find all visible inputs and save them as our new list
+		const inputs = this.element.querySelectorAll("input");
+		const updated = [];
+
+		for (let i = 0; i < inputs.length; i++) {
+			const input = inputs[i];
+			if (input.parentElement.style.display !== "none") {
+				const t = this.templates[i];
+				t.name = input.value.trim() || input.getAttribute("data-name");
+				updated.push(t);
+			}
+		}
+
+		this.templates = updated;
+		this.store();
+		this.close();
+	}
+
+	store() {
+		localStorage.setItem(id, JSON.stringify(this.templates));
+	}
+
+	show() {
+		// Show list of template names + delete button
+		super.show(
+			$el(
+				"div",
+				{
+					style: {
+						display: "grid",
+						gridTemplateColumns: "1fr auto",
+						gap: "5px",
+					},
+				},
+				this.templates.flatMap((t) => {
+					let nameInput;
+					return [
+						$el(
+							"label",
+							{
+								textContent: "Name: ",
+							},
+							[
+								$el("input", {
+									value: t.name,
+									dataset: { name: t.name },
+									$: (el) => (nameInput = el),
+								}),
+							]
+						),
+						$el("button", {
+							textContent: "Delete",
+							style: {
+								fontSize: "12px",
+								color: "red",
+								fontWeight: "normal",
+							},
+							onclick: (e) => {
+								nameInput.value = "";
+								e.target.style.display = "none";
+								e.target.previousElementSibling.style.display = "none";
+							},
+						}),
+					];
+				})
+			)
+		);
+	}
+}
+
+app.registerExtension({
+	name: id,
+	setup() {
+		const manage = new ManageTemplates();
+
+		const clipboardAction = (cb) => {
+			// We use the clipboard functions but dont want to overwrite the current user clipboard
+			// Restore it after we've run our callback
+			const old = localStorage.getItem("litegrapheditor_clipboard");
+			cb();
+			localStorage.setItem("litegrapheditor_clipboard", old);
+		};
+
+		const orig = LGraphCanvas.prototype.getCanvasMenuOptions;
+		LGraphCanvas.prototype.getCanvasMenuOptions = function () {
+			const options = orig.apply(this, arguments);
+
+			options.push(null);
+			options.push({
+				content: `Save Selected as Template`,
+				disabled: !Object.keys(app.canvas.selected_nodes || {}).length,
+				callback: () => {
+					const name = prompt("Enter name");
+					if (!name || !name.trim()) return;
+
+					clipboardAction(() => {
+						app.canvas.copyToClipboard();
+						manage.templates.push({
+							name,
+							data: localStorage.getItem("litegrapheditor_clipboard"),
+						});
+						manage.store();
+					});
+				},
+			});
+
+			// Map each template to a menu item
+			const subItems = manage.templates.map((t) => ({
+				content: t.name,
+				callback: () => {
+					clipboardAction(() => {
+						localStorage.setItem("litegrapheditor_clipboard", t.data);
+						app.canvas.pasteFromClipboard();
+					});
+				},
+			}));
+
+			if (subItems.length) {
+				subItems.push(null, {
+					content: "Manage",
+					callback: () => manage.show(),
+				});
+
+				options.push({
+					content: "Node Templates",
+					submenu: {
+						options: subItems,
+					},
+				});
+			}
+
+			return options;
+		};
+	},
+});