450 lines
15 KiB
TypeScript
450 lines
15 KiB
TypeScript
import { z } from "zod";
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import { jsonValueSchema } from "./jsonValue.js";
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const recordSchema = z.record(z.string(), z.unknown());
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const objectNode = z.strictObject({
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id: z.string().min(1),
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kind: z.enum([
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"view_controller",
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"view",
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"control",
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"constraint",
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"layout_guide",
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"resource",
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"placeholder",
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"external_object",
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"other",
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]),
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class_name: z.string().nullable(),
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name: z.string().min(1),
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attributes: z.record(z.string(), jsonValueSchema),
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});
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const connection = z.strictObject({
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id: z.string().min(1),
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kind: z.enum(["outlet", "action", "segue", "other"]),
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source_id: z.string().min(1),
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destination_id: z.string().nullable(),
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label: z.string().nullable(),
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attributes: z.record(z.string(), jsonValueSchema),
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});
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type InterfaceBuilderObject = z.infer<typeof objectNode>;
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type InterfaceBuilderConnection = z.infer<typeof connection>;
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/** Parse ibtool dictionaries or compiled keyed archives into typed records. */
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export const parseInterfaceBuilderRecords = (
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value: unknown,
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): {
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readonly objects: readonly InterfaceBuilderObject[];
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readonly connections: readonly InterfaceBuilderConnection[];
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readonly hierarchy: readonly unknown[];
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readonly classes: Readonly<Record<string, unknown>>;
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readonly objectCount: number;
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readonly omittedObjects: number;
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readonly omittedConnections: number;
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} => {
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const root = record(value);
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const keyed = parseKeyedArchive(root);
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if (keyed !== null) return keyed;
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const objectsRaw = record(root["com.apple.ibtool.document.objects"]);
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const connectionsRaw = record(root["com.apple.ibtool.document.connections"]);
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const hierarchyRaw = root["com.apple.ibtool.document.hierarchy"];
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const classesRaw = record(root["com.apple.ibtool.document.classes"]);
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const objects: InterfaceBuilderObject[] = [];
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const connections: InterfaceBuilderConnection[] = [];
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let omittedConnections = 0;
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const objectEntries = Object.entries(objectsRaw);
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for (const [id, raw] of objectEntries.slice(0, 20_000)) {
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const attributes = record(raw);
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const className = firstString(
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attributes["customClass"],
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attributes["class"],
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attributes["isa"],
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);
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const label = firstString(
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attributes["label"],
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attributes["title"],
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attributes["name"],
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className,
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);
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objects.push(
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objectNode.parse({
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id,
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kind: classifyObject(className),
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class_name: className,
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name: label ?? id,
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attributes: jsonSafeRecord(attributes),
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}),
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);
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}
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for (const [sourceId, rawConnections] of Object.entries(connectionsRaw)) {
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if (!Array.isArray(rawConnections)) continue;
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for (const [index, raw] of rawConnections.entries()) {
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if (connections.length >= 40_000) {
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omittedConnections += rawConnections.length - index;
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break;
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}
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const item = record(raw);
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const type = firstString(item.type, item.connectionType) ?? "unknown";
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const destination = firstString(
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item["destination-id"],
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item.destinationId,
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);
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const label = firstString(item.label, item.selector, item.identifier);
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connections.push(
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connection.parse({
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id: `${sourceId}:connection:${index}`,
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kind: classifyConnection(type),
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source_id: sourceId,
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destination_id: destination,
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label,
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attributes: jsonSafeRecord(item),
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}),
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);
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}
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}
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return {
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objects,
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connections,
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hierarchy: Array.isArray(hierarchyRaw) ? hierarchyRaw.slice(0, 20_000) : [],
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classes: classesRaw,
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objectCount: objectEntries.length,
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omittedObjects: Math.max(0, objectEntries.length - 20_000),
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omittedConnections,
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};
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};
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/**
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* A UID decodes as a one-key `UID` (binary) or `CF$UID` (XML) dictionary with
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* an integer value. Any other dictionary is ordinary archive data.
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*/
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const archiveUid = (value: unknown): number | undefined => {
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if (typeof value !== "object" || value === null || Array.isArray(value))
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return undefined;
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if (Object.keys(value).length !== 1) return undefined;
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const item = record(value);
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const marker = Object.hasOwn(item, "UID") ? item.UID : item["CF$UID"];
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return typeof marker === "number" && Number.isInteger(marker)
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? marker
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: undefined;
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};
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const HIERARCHY_KEY =
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/(?:subviews|contentview|childviewcontrollers|children|views)$/iu;
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/**
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* Read an NSKeyedArchiver object table without expanding it into a tree.
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* Archived objects reference each other freely, including cycles such as a
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* view and its superview, so inlining every reference grows exponentially.
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* A reference instead resolves to the referenced string, or to a stub that
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* names the referenced object; the hierarchy walk visits each object once.
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*/
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const keyedArchiveTable = (objectTable: readonly unknown[]) => {
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const classNameOf = (value: unknown): string | null => {
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const classReference = record(value).$class;
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const uid = archiveUid(classReference);
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return firstString(
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record(uid === undefined ? classReference : objectTable[uid]).$classname,
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);
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};
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/** The string an archived string object holds, if it is one. */
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const archivedString = (target: unknown): string | undefined => {
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if (typeof target === "string") return target;
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const text = record(target)["NS.string"];
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return typeof text === "string" &&
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/^NS(?:Mutable)?String$/u.test(classNameOf(target) ?? "")
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? text
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: undefined;
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};
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const text = (value: unknown): string | null => {
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const uid = archiveUid(value);
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return firstString(
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uid === undefined ? value : archivedString(objectTable[uid]),
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);
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};
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const authoredId = (item: Record<string, unknown>): string | null =>
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firstString(text(item.objectID), text(item["object-id"]));
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const reference = (uid: number): unknown => {
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// UID 0 is the archived nil.
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const target = uid === 0 ? null : objectTable[uid];
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if (target === undefined || target === null) return null;
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if (typeof target !== "object") return target;
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const string = archivedString(target);
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if (string !== undefined) return string;
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const objectId = authoredId(record(target));
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return {
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archiveUID: uid,
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...(objectId === null ? {} : { objectID: objectId }),
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className: classNameOf(target),
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};
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};
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/** Resolve one object's own fields, leaving references to other objects as stubs. */
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const resolve = (value: unknown): unknown => {
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const uid = archiveUid(value);
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if (uid !== undefined) return reference(uid);
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if (Array.isArray(value)) return value.map(resolve);
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if (typeof value !== "object" || value === null) return value;
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const output: Record<string, unknown> = {};
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for (const [key, child] of Object.entries(value)) {
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if (key === "$class") output.className = classNameOf(value);
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else output[key] = resolve(child);
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}
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return output;
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};
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const hierarchy = (start: unknown): unknown[] => {
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const visited = new Set<number>();
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const node = (
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item: Record<string, unknown>,
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uid: number | undefined,
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depth: number,
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): unknown[] => {
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const objectId = firstString(
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authoredId(item),
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text(item.id),
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uid === undefined ? null : String(uid),
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);
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const children = Object.entries(item)
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.filter(([key]) => HIERARCHY_KEY.test(key))
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.flatMap(([, child]) => visit(child, depth + 1));
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return objectId === null ? children : [{ objectID: objectId, children }];
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};
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const visit = (value: unknown, depth: number): unknown[] => {
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if (depth > 32) return [];
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const uid = archiveUid(value);
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if (uid !== undefined) {
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if (visited.has(uid)) return [];
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visited.add(uid);
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const target = objectTable[uid];
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if (Array.isArray(target)) return visit(target, depth + 1);
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return typeof target === "object" && target !== null
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? node(record(target), uid, depth)
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: [];
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}
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if (Array.isArray(value))
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return value.flatMap((item) => visit(item, depth + 1));
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if (typeof value !== "object" || value === null) return [];
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return node(record(value), undefined, depth);
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};
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return visit(start, 0);
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};
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return { resolve, hierarchy };
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};
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/** Project class and connection objects from an NSKeyedArchiver object table. */
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const parseKeyedArchive = (
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root: Record<string, unknown>,
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): ReturnType<typeof parseInterfaceBuilderRecords> | null => {
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if (root.$archiver !== "NSKeyedArchiver" || !Array.isArray(root.$objects))
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return null;
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const objectTable: readonly unknown[] = root.$objects;
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const { resolve, hierarchy: toHierarchy } = keyedArchiveTable(objectTable);
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const objects: InterfaceBuilderObject[] = [];
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const connections: InterfaceBuilderConnection[] = [];
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let objectCount = 0;
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let omittedConnections = 0;
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for (const [index, raw] of objectTable.entries()) {
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if (index === 0) continue;
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const resolved = record(resolve(raw));
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const className = firstString(resolved.className);
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if (className === null) continue;
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objectCount += 1;
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const fields = Object.fromEntries(
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Object.entries(resolved).filter(([key]) => key !== "className"),
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);
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const authoredId = firstString(fields.objectID, fields["object-id"]);
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const objectId =
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authoredId ??
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(typeof fields.archiveUID === "number"
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? String(fields.archiveUID)
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: String(index));
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const kind = classifyObject(className);
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if (objects.length < 20_000)
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objects.push(
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objectNode.parse({
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id: objectId,
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kind,
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class_name: className,
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name:
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firstString(
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fields.label,
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fields.title,
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fields.identifier,
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fields.accessibilityLabel,
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className,
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) ?? `object ${String(index)}`,
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attributes: jsonSafeRecord(fields),
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}),
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);
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if (
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/(?:Outlet|Connection|Segue|ActionConnection|ControlConnector)/iu.test(
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className,
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)
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) {
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const controlAction = /ControlConnector/iu.test(className);
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// AppKit connectors (NSNibOutletConnector, NSNibControlConnector)
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// archive NSSource as the outlet owner or sending control and
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// NSDestination as the outlet value or action target, so they are read
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// in that order without the inversion the unprefixed fields use.
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const source = firstObjectReference(
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controlAction ? fields.destination : fields.source,
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archivedObjectReference(fields.NSSource),
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controlAction ? fields.to : fields.from,
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controlAction ? fields.target : fields.owner,
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);
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if (source === null) continue;
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const kind = controlAction ? "action" : classifyConnection(className);
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const parsedConnection = connection.parse({
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id: `archive:${objectId}`,
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kind,
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source_id: source,
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destination_id: firstObjectReference(
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controlAction ? fields.source : fields.destination,
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archivedObjectReference(fields.NSDestination),
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controlAction ? fields.from : fields.to,
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controlAction ? fields.owner : fields.target,
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),
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label: firstString(
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fields.label,
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fields.NSLabel,
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fields.selector,
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fields.identifier,
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fields.action,
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),
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attributes: jsonSafeRecord(fields),
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});
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if (connections.length < 40_000) connections.push(parsedConnection);
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else omittedConnections += 1;
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}
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}
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const top = record(root.$top);
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const hierarchy = toHierarchy(top.root ?? top.UITopLevelObjectsKey);
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const classes = Object.fromEntries(
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objectTable.flatMap((raw) => {
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const item = record(raw);
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const name = firstString(item.$classname);
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return name === null
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? []
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: [
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[
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name,
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{
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superclasses: Array.isArray(item.$classes) ? item.$classes : [],
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},
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],
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];
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}),
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);
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return {
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objects,
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connections,
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hierarchy,
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classes,
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objectCount,
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omittedObjects: Math.max(0, objectCount - 20_000),
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omittedConnections,
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};
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};
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/** Coerce unknown values to a string-keyed record; non-objects become `{}`. */
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export const record = (value: unknown): Record<string, unknown> =>
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recordSchema.safeParse(value).data ?? {};
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/** First non-empty string among the candidates, otherwise null. */
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export const firstString = (...values: unknown[]): string | null => {
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for (const value of values)
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if (typeof value === "string" && value.length > 0) return value;
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return null;
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};
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/**
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* The node identity of a resolved archive reference: its authored object ID,
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* otherwise its archive UID, which is how the referenced object's node is keyed.
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*/
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const archivedObjectReference = (value: unknown): string | null => {
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const item = record(value);
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if (typeof item.archiveUID !== "number") return null;
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return (
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firstString(item.objectID, item["object-id"]) ?? String(item.archiveUID)
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);
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};
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const firstObjectReference = (...values: unknown[]): string | null => {
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for (const value of values) {
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const direct = firstString(value);
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if (direct !== null) return direct;
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const item = record(value);
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const objectId = firstString(
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item.objectID,
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item["object-id"],
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item.id,
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item.identifier,
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typeof item.archiveUID === "number" ? String(item.archiveUID) : null,
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);
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if (objectId !== null) return objectId;
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}
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return null;
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};
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const classifyObject = (
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className: string | null,
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): InterfaceBuilderObject["kind"] => {
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const value = className?.toLowerCase() ?? "";
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if (value.includes("constraint")) return "constraint";
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if (value.includes("layoutguide")) return "layout_guide";
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if (value.includes("placeholder") || value.includes("firstresponder"))
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return "placeholder";
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if (
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value.includes("image") ||
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value.includes("color") ||
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value.includes("font")
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)
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return "resource";
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if (value.includes("external")) return "external_object";
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if (value.includes("viewcontroller") || value.includes("windowcontroller"))
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return "view_controller";
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if (
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value.includes("button") ||
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value.includes("control") ||
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value.includes("textfield") ||
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value.includes("slider") ||
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value.includes("menuitem")
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)
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return "control";
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if (
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value.includes("view") ||
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value.includes("window") ||
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value.includes("cell")
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)
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return "view";
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return "other";
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};
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const classifyConnection = (
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type: string,
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): InterfaceBuilderConnection["kind"] => {
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const value = type.toLowerCase();
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if (value.includes("outlet")) return "outlet";
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if (value.includes("action")) return "action";
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if (value.includes("segue")) return "segue";
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return "other";
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};
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const jsonSafeRecord = (value: Record<string, unknown>) =>
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Object.fromEntries(
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Object.entries(value).flatMap(([key, item]) => {
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try {
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const serialized = JSON.stringify(item);
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if (serialized === undefined) return [];
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const parsed = jsonValueSchema.safeParse(JSON.parse(serialized));
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return parsed.success ? [[key, parsed.data]] : [];
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} catch (cause: unknown) {
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// Unserializable entries are omitted from the record.
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void cause;
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return [];
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}
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}),
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);
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