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Viewing file:     CustomQueryHandler.js (5.69 KB)      -rw-r--r--

"use strict";
/**
 * @license
 * Copyright 2023 Google Inc.
 * SPDX-License-Identifier: Apache-2.0
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.clearCustomQueryHandlers = exports.customQueryHandlerNames = exports.unregisterCustomQueryHandler = exports.registerCustomQueryHandler = exports.customQueryHandlers = exports.CustomQueryHandlerRegistry = void 0;
const assert_js_1 = require("../util/assert.js");
const Function_js_1 = require("../util/Function.js");
const QueryHandler_js_1 = require("./QueryHandler.js");
const ScriptInjector_js_1 = require("./ScriptInjector.js");
/**
 * The registry of {@link CustomQueryHandler | custom query handlers}.
 *
 * @example
 *
 * ```ts
 * Puppeteer.customQueryHandlers.register('lit', { … });
 * const aHandle = await page.$('lit/…');
 * ```
 *
 * @internal
 */
class CustomQueryHandlerRegistry {
    #handlers = new Map();
    get(name) {
        const handler = this.#handlers.get(name);
        return handler ? handler[1] : undefined;
    }
    /**
     * Registers a {@link CustomQueryHandler | custom query handler}.
     *
     * @remarks
     * After registration, the handler can be used everywhere where a selector is
     * expected by prepending the selection string with `<name>/`. The name is
     * only allowed to consist of lower- and upper case latin letters.
     *
     * @example
     *
     * ```ts
     * Puppeteer.customQueryHandlers.register('lit', { … });
     * const aHandle = await page.$('lit/…');
     * ```
     *
     * @param name - Name to register under.
     * @param queryHandler - {@link CustomQueryHandler | Custom query handler} to
     * register.
     */
    register(name, handler) {
        (0, assert_js_1.assert)(!this.#handlers.has(name), `Cannot register over existing handler: ${name}`);
        (0, assert_js_1.assert)(/^[a-zA-Z]+$/.test(name), `Custom query handler names may only contain [a-zA-Z]`);
        (0, assert_js_1.assert)(handler.queryAll || handler.queryOne, `At least one query method must be implemented.`);
        const Handler = class extends QueryHandler_js_1.QueryHandler {
            static querySelectorAll = (0, Function_js_1.interpolateFunction)((node, selector, PuppeteerUtil) => {
                return PuppeteerUtil.customQuerySelectors
                    .get(PLACEHOLDER('name'))
                    .querySelectorAll(node, selector);
            }, { name: JSON.stringify(name) });
            static querySelector = (0, Function_js_1.interpolateFunction)((node, selector, PuppeteerUtil) => {
                return PuppeteerUtil.customQuerySelectors
                    .get(PLACEHOLDER('name'))
                    .querySelector(node, selector);
            }, { name: JSON.stringify(name) });
        };
        const registerScript = (0, Function_js_1.interpolateFunction)((PuppeteerUtil) => {
            PuppeteerUtil.customQuerySelectors.register(PLACEHOLDER('name'), {
                queryAll: PLACEHOLDER('queryAll'),
                queryOne: PLACEHOLDER('queryOne'),
            });
        }, {
            name: JSON.stringify(name),
            queryAll: handler.queryAll
                ? (0, Function_js_1.stringifyFunction)(handler.queryAll)
                : String(undefined),
            queryOne: handler.queryOne
                ? (0, Function_js_1.stringifyFunction)(handler.queryOne)
                : String(undefined),
        }).toString();
        this.#handlers.set(name, [registerScript, Handler]);
        ScriptInjector_js_1.scriptInjector.append(registerScript);
    }
    /**
     * Unregisters the {@link CustomQueryHandler | custom query handler} for the
     * given name.
     *
     * @throws `Error` if there is no handler under the given name.
     */
    unregister(name) {
        const handler = this.#handlers.get(name);
        if (!handler) {
            throw new Error(`Cannot unregister unknown handler: ${name}`);
        }
        ScriptInjector_js_1.scriptInjector.pop(handler[0]);
        this.#handlers.delete(name);
    }
    /**
     * Gets the names of all {@link CustomQueryHandler | custom query handlers}.
     */
    names() {
        return [...this.#handlers.keys()];
    }
    /**
     * Unregisters all custom query handlers.
     */
    clear() {
        for (const [registerScript] of this.#handlers) {
            ScriptInjector_js_1.scriptInjector.pop(registerScript);
        }
        this.#handlers.clear();
    }
}
exports.CustomQueryHandlerRegistry = CustomQueryHandlerRegistry;
/**
 * @internal
 */
exports.customQueryHandlers = new CustomQueryHandlerRegistry();
/**
 * @deprecated Import {@link Puppeteer} and use the static method
 * {@link Puppeteer.registerCustomQueryHandler}
 *
 * @public
 */
function registerCustomQueryHandler(name, handler) {
    exports.customQueryHandlers.register(name, handler);
}
exports.registerCustomQueryHandler = registerCustomQueryHandler;
/**
 * @deprecated Import {@link Puppeteer} and use the static method
 * {@link Puppeteer.unregisterCustomQueryHandler}
 *
 * @public
 */
function unregisterCustomQueryHandler(name) {
    exports.customQueryHandlers.unregister(name);
}
exports.unregisterCustomQueryHandler = unregisterCustomQueryHandler;
/**
 * @deprecated Import {@link Puppeteer} and use the static method
 * {@link Puppeteer.customQueryHandlerNames}
 *
 * @public
 */
function customQueryHandlerNames() {
    return exports.customQueryHandlers.names();
}
exports.customQueryHandlerNames = customQueryHandlerNames;
/**
 * @deprecated Import {@link Puppeteer} and use the static method
 * {@link Puppeteer.clearCustomQueryHandlers}
 *
 * @public
 */
function clearCustomQueryHandlers() {
    exports.customQueryHandlers.clear();
}
exports.clearCustomQueryHandlers = clearCustomQueryHandlers;
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