Function getTextNodeAtPosition

src/webpage/markdown.ts:1429–1519

(
	root: Node,
	index: number,
	txtLengthFunc = MarkDown.gatherBoxText.bind(MarkDown),
)

					}
				} else {
					console.error(context);
				}
				return;
			}
			for (const node of children as Node[]) {
				if (selection.containsNode(node, false)) {
					if (node instanceof HTMLElement) {
						build += txtLengthFunc(node);
					} else {
						build += node.textContent;
					}
				} else if (selection.containsNode(node, true)) {
					if (node instanceof HTMLElement) {
						crawlForText(node);
					} else {
						build += node.textContent;
					}
				} else {
					//console.error(node, "This shouldn't happen");
				}
			}
		}
		crawlForText(context);
		if (baseString === "\n") {
			//build += baseString;
		}
		text = build;
		len += build.length;
		if (computedLength !== undefined) {
			len = computedLength;
		}
		len = Math.min(len, txtLengthFunc(context).length);
		len += offset;

		return function restore(_backspace = false) {
			if (!selection) return;
			const pos = getTextNodeAtPosition(context, len, txtLengthFunc);
			if (
				pos.node instanceof Text &&
				pos.node.textContent === "\n" &&
				pos.node.nextSibling &&
				isFirefox
			) {
				if (pos.node.nextSibling instanceof Text && pos.node.nextSibling.textContent === "\n") {
					pos.position = 1;
				} else {
					pos.node = pos.node.nextSibling;
					pos.position = 0;
				}
			}
			selection.removeAllRanges();
			const range = new Range();
			range.setStart(pos.node, pos.position);
			selection.addRange(range);
		};
	} catch {
		return undefined;
	}