puppeteer-core
Version:
A high-level API to control headless Chrome over the DevTools Protocol
145 lines • 5.38 kB
JavaScript
;
/**
* @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, inner;
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 (async) inner = dispose;
}
if (typeof dispose !== "function") throw new TypeError("Object not disposable.");
if (inner) dispose = function() { try { inner.call(this); } catch (e) { return Promise.reject(e); } };
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;
}
var r, s = 0;
function next() {
while (r = env.stack.pop()) {
try {
if (!r.async && s === 1) return s = 0, env.stack.push(r), Promise.resolve().then(next);
if (r.dispose) {
var result = r.dispose.call(r.value);
if (r.async) return s |= 2, Promise.resolve(result).then(next, function(e) { fail(e); return next(); });
}
else s |= 1;
}
catch (e) {
fail(e);
}
}
if (s === 1) return env.hasError ? Promise.reject(env.error) : Promise.resolve();
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;
});
Object.defineProperty(exports, "__esModule", { value: true });
exports.transposeIterableHandle = transposeIterableHandle;
const disposable_js_1 = require("../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 disposable_js_1.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[disposable_js_1.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
*/
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);
}
}
//# sourceMappingURL=HandleIterator.js.map