custom_nodes/ComfyUI-Custom-Scripts/web/js/showText.js

import { app } from "../../../scripts/app.js";
import { ComfyWidgets } from "../../../scripts/widgets.js";

// Displays input text on a node

// TODO: This should need to be so complicated. Refactor at some point.

app.registerExtension({
	name: "pysssss.ShowText",
	async beforeRegisterNodeDef(nodeType, nodeData, app) {
		if (nodeData.name === "ShowText|pysssss") {
			function populate(text) {
				if (this.widgets) {
					// On older frontend versions there is a hidden converted-widget
					const isConvertedWidget = +!!this.inputs?.[0].widget;
					for (let i = isConvertedWidget; i < this.widgets.length; i++) {
						this.widgets[i].onRemove?.();
					}
					this.widgets.length = isConvertedWidget;
				}

				const v = [...text];
				if (!v[0]) {
					v.shift();
				}
				for (let list of v) {
					// Force list to be an array, not sure why sometimes it is/isn't
					if (!(list instanceof Array)) list = [list];
					for (const l of list) {
						const w = ComfyWidgets["STRING"](this, "text_" + this.widgets?.length ?? 0, ["STRING", { multiline: true }], app).widget;
						w.inputEl.readOnly = true;
						w.inputEl.style.opacity = 0.6;
						w.value = l;
					}
				}

				requestAnimationFrame(() => {
					const sz = this.computeSize();
					if (sz[0] < this.size[0]) {
						sz[0] = this.size[0];
					}
					if (sz[1] < this.size[1]) {
						sz[1] = this.size[1];
					}
					this.onResize?.(sz);
					app.graph.setDirtyCanvas(true, false);
				});
			}

			// When the node is executed we will be sent the input text, display this in the widget
			const onExecuted = nodeType.prototype.onExecuted;
			nodeType.prototype.onExecuted = function (message) {
				onExecuted?.apply(this, arguments);
				populate.call(this, message.text);
			};

			const VALUES = Symbol();
			const configure = nodeType.prototype.configure;
			nodeType.prototype.configure = function () {
				// Store unmodified widget values as they get removed on configure by new frontend
				this[VALUES] = arguments[0]?.widgets_values;
				return configure?.apply(this, arguments);
			};

			const onConfigure = nodeType.prototype.onConfigure;
			nodeType.prototype.onConfigure = function () {
				onConfigure?.apply(this, arguments);
				const widgets_values = this[VALUES];
				if (widgets_values?.length) {
					// In newer frontend there seems to be a delay in creating the initial widget
					requestAnimationFrame(() => {
						populate.call(this, widgets_values.slice(+(widgets_values.length > 1 && this.inputs?.[0].widget)));
					});
				}
			};
		}
	},
});