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Viewing file:     HandleIterator.js (4.69 KB)      -rw-r--r--

/**
 * @license
 * Copyright 2023 Google Inc.
 * SPDX-License-Identifier: Apache-2.0
 */
var __addDisposableResource = (this && this.__addDisposableResource) || function (env, value, async) {
    if (value !== null && value !== void 0) {
        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
        var dispose;
        if (async) {
            if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
            dispose = value[Symbol.asyncDispose];
        }
        if (dispose === void 0) {
            if (!Symbol.dispose) throw new TypeError("Symbol.dispose is not defined.");
            dispose = value[Symbol.dispose];
        }
        if (typeof dispose !== "function") throw new TypeError("Object not disposable.");
        env.stack.push({ value: value, dispose: dispose, async: async });
    }
    else if (async) {
        env.stack.push({ async: true });
    }
    return value;
};
var __disposeResources = (this && this.__disposeResources) || (function (SuppressedError) {
    return function (env) {
        function fail(e) {
            env.error = env.hasError ? new SuppressedError(e, env.error, "An error was suppressed during disposal.") : e;
            env.hasError = true;
        }
        function next() {
            while (env.stack.length) {
                var rec = env.stack.pop();
                try {
                    var result = rec.dispose && rec.dispose.call(rec.value);
                    if (rec.async) return Promise.resolve(result).then(next, function(e) { fail(e); return next(); });
                }
                catch (e) {
                    fail(e);
                }
            }
            if (env.hasError) throw env.error;
        }
        return next();
    };
})(typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
    var e = new Error(message);
    return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
});
import { DisposableStack, disposeSymbol } from '../util/disposable.js';
const DEFAULT_BATCH_SIZE = 20;
/**
 * This will transpose an iterator JSHandle into a fast, Puppeteer-side iterator
 * of JSHandles.
 *
 * @param size - The number of elements to transpose. This should be something
 * reasonable.
 */
async function* fastTransposeIteratorHandle(iterator, size) {
    const env_1 = { stack: [], error: void 0, hasError: false };
    try {
        const array = __addDisposableResource(env_1, await iterator.evaluateHandle(async (iterator, size) => {
            const results = [];
            while (results.length < size) {
                const result = await iterator.next();
                if (result.done) {
                    break;
                }
                results.push(result.value);
            }
            return results;
        }, size), false);
        const properties = (await array.getProperties());
        const handles = properties.values();
        const stack = __addDisposableResource(env_1, new DisposableStack(), false);
        stack.defer(() => {
            for (const handle_1 of handles) {
                const env_2 = { stack: [], error: void 0, hasError: false };
                try {
                    const handle = __addDisposableResource(env_2, handle_1, false);
                    handle[disposeSymbol]();
                }
                catch (e_2) {
                    env_2.error = e_2;
                    env_2.hasError = true;
                }
                finally {
                    __disposeResources(env_2);
                }
            }
        });
        yield* handles;
        return properties.size === 0;
    }
    catch (e_1) {
        env_1.error = e_1;
        env_1.hasError = true;
    }
    finally {
        __disposeResources(env_1);
    }
}
/**
 * This will transpose an iterator JSHandle in batches based on the default size
 * of {@link fastTransposeIteratorHandle}.
 */
async function* transposeIteratorHandle(iterator) {
    let size = DEFAULT_BATCH_SIZE;
    while (!(yield* fastTransposeIteratorHandle(iterator, size))) {
        size <<= 1;
    }
}
/**
 * @internal
 */
export async function* transposeIterableHandle(handle) {
    const env_3 = { stack: [], error: void 0, hasError: false };
    try {
        const generatorHandle = __addDisposableResource(env_3, await handle.evaluateHandle(iterable => {
            return (async function* () {
                yield* iterable;
            })();
        }), false);
        yield* transposeIteratorHandle(generatorHandle);
    }
    catch (e_3) {
        env_3.error = e_3;
        env_3.hasError = true;
    }
    finally {
        __disposeResources(env_3);
    }
}
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