ComfyUI/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;
		};
	},
});