How to use ReadableStreamDefaultControllerShouldCallPull method in wpt

Best JavaScript code snippet using wpt

ReadableStream.js

Source:ReadableStream.js

...754    return hasOwnPropertyNoThrow(x, _controlledReadableStream);755  }756  function ReadableStreamDefaultControllerCallPullIfNeeded(controller) {757    const shouldPull =758          ReadableStreamDefaultControllerShouldCallPull(controller);759    if (shouldPull === false) {760      return undefined;761    }762    if (controller[_readableStreamDefaultControllerBits] & PULLING) {763      controller[_readableStreamDefaultControllerBits] |= PULL_AGAIN;764      return undefined;765    }766    controller[_readableStreamDefaultControllerBits] |= PULLING;767    const underlyingSource = controller[_underlyingSource];768    const pullPromise = PromiseCallOrNoop1(769        underlyingSource, 'pull', controller, 'underlyingSource.pull');770    thenPromise(771        pullPromise,772        () => {773          controller[_readableStreamDefaultControllerBits] &= ~PULLING;774          if (controller[_readableStreamDefaultControllerBits] & PULL_AGAIN) {775            controller[_readableStreamDefaultControllerBits] &= ~PULL_AGAIN;776            ReadableStreamDefaultControllerCallPullIfNeeded(controller);777          }778        },779        e => {780          if (ReadableStreamGetState(controller[_controlledReadableStream]) ===781              STATE_READABLE) {782            ReadableStreamDefaultControllerError(controller, e);783          }784        });785  }786  function ReadableStreamDefaultControllerShouldCallPull(controller) {787    const stream = controller[_controlledReadableStream];788    const state = ReadableStreamGetState(stream);789    if (state === STATE_CLOSED || state === STATE_ERRORED) {790      return false;791    }792    if (controller[_readableStreamDefaultControllerBits] & CLOSE_REQUESTED) {793      return false;794    }795    if (!(controller[_readableStreamDefaultControllerBits] & STARTED)) {796      return false;797    }798    if (IsReadableStreamLocked(stream) === true &&799        ReadableStreamGetNumReadRequests(stream) > 0) {800      return true;801    }802    const desiredSize =803          ReadableStreamDefaultControllerGetDesiredSize(controller);804    if (desiredSize > 0) {805      return true;806    }807    return false;808  }809  function ReadableStreamDefaultControllerClose(controller) {810    const stream = controller[_controlledReadableStream];811    controller[_readableStreamDefaultControllerBits] |= CLOSE_REQUESTED;812    if (controller[_queue].length === 0) {813      ReadableStreamClose(stream);814    }815  }816  function ReadableStreamDefaultControllerEnqueue(controller, chunk) {817    const stream = controller[_controlledReadableStream];818    if (IsReadableStreamLocked(stream) === true &&819        ReadableStreamGetNumReadRequests(stream) > 0) {820      ReadableStreamFulfillReadRequest(stream, chunk, false);821    } else {822      let chunkSize = 1;823      const strategySize = controller[_strategySize];824      if (strategySize !== undefined) {825        try {826          chunkSize = strategySize(chunk);827        } catch (chunkSizeE) {828          if (ReadableStreamGetState(stream) === STATE_READABLE) {829            ReadableStreamDefaultControllerError(controller, chunkSizeE);830          }831          throw chunkSizeE;832        }833      }834      try {835        EnqueueValueWithSize(controller, chunk, chunkSize);836      } catch (enqueueE) {837        if (ReadableStreamGetState(stream) === STATE_READABLE) {838          ReadableStreamDefaultControllerError(controller, enqueueE);839        }840        throw enqueueE;841      }842    }843    ReadableStreamDefaultControllerCallPullIfNeeded(controller);844  }845  function ReadableStreamDefaultControllerError(controller, e) {846    controller[_queue] = new binding.SimpleQueue();847    const stream = controller[_controlledReadableStream];848    ReadableStreamError(stream, e);849  }850  function ReadableStreamDefaultControllerGetDesiredSize(controller) {851    return controller[_strategyHWM] - controller[_queueTotalSize];852  }853  function ReadableStreamDefaultControllerHasBackpressure(controller) {854    return !ReadableStreamDefaultControllerShouldCallPull(controller);855  }856  function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller) {857    if (controller[_readableStreamDefaultControllerBits] & CLOSE_REQUESTED) {858      return false;859    }860    const state = ReadableStreamGetState(controller[_controlledReadableStream]);861    return state === STATE_READABLE;862  }863  //864  // Internal functions. Not part of the standard.865  //866  function ReadableStreamGetState(stream) {867    return (stream[_readableStreamBits] & STATE_MASK) >> STATE_BITS_OFFSET;868  }...

default-controller.ts

Source:default-controller.ts

...136  }137  return true;138}139function ReadableStreamDefaultControllerCallPullIfNeeded(controller: ReadableStreamDefaultController<any>): void {140  const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);141  if (!shouldPull) {142    return;143  }144  if (controller._pulling) {145    controller._pullAgain = true;146    return;147  }148  assert(!controller._pullAgain);149  controller._pulling = true;150  const pullPromise = controller._pullAlgorithm();151  uponPromise(152    pullPromise,153    () => {154      controller._pulling = false;155      if (controller._pullAgain) {156        controller._pullAgain = false;157        ReadableStreamDefaultControllerCallPullIfNeeded(controller);158      }159    },160    e => {161      ReadableStreamDefaultControllerError(controller, e);162    }163  );164}165function ReadableStreamDefaultControllerShouldCallPull(controller: ReadableStreamDefaultController<any>): boolean {166  const stream = controller._controlledReadableStream;167  if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {168    return false;169  }170  if (!controller._started) {171    return false;172  }173  if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {174    return true;175  }176  const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);177  assert(desiredSize !== null);178  if (desiredSize! > 0) {179    return true;180  }181  return false;182}183function ReadableStreamDefaultControllerClearAlgorithms(controller: ReadableStreamDefaultController<any>) {184  controller._pullAlgorithm = undefined!;185  controller._cancelAlgorithm = undefined!;186  controller._strategySizeAlgorithm = undefined!;187}188// A client of ReadableStreamDefaultController may use these functions directly to bypass state check.189export function ReadableStreamDefaultControllerClose(controller: ReadableStreamDefaultController<any>) {190  if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {191    return;192  }193  const stream = controller._controlledReadableStream;194  controller._closeRequested = true;195  if (controller._queue.length === 0) {196    ReadableStreamDefaultControllerClearAlgorithms(controller);197    ReadableStreamClose(stream);198  }199}200export function ReadableStreamDefaultControllerEnqueue<R>(controller: ReadableStreamDefaultController<R>, chunk: R): void {201  if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {202    return;203  }204  const stream = controller._controlledReadableStream;205  if (IsReadableStreamLocked(stream) && ReadableStreamGetNumReadRequests(stream) > 0) {206    ReadableStreamFulfillReadRequest(stream, chunk, false);207  } else {208    let chunkSize;209    try {210      chunkSize = controller._strategySizeAlgorithm(chunk);211    } catch (chunkSizeE) {212      ReadableStreamDefaultControllerError(controller, chunkSizeE);213      throw chunkSizeE;214    }215    try {216      EnqueueValueWithSize(controller, chunk, chunkSize);217    } catch (enqueueE) {218      ReadableStreamDefaultControllerError(controller, enqueueE);219      throw enqueueE;220    }221  }222  ReadableStreamDefaultControllerCallPullIfNeeded(controller);223}224export function ReadableStreamDefaultControllerError(controller: ReadableStreamDefaultController<any>, e: any) {225  const stream = controller._controlledReadableStream;226  if (stream._state !== 'readable') {227    return;228  }229  ResetQueue(controller);230  ReadableStreamDefaultControllerClearAlgorithms(controller);231  ReadableStreamError(stream, e);232}233export function ReadableStreamDefaultControllerGetDesiredSize(controller: ReadableStreamDefaultController<any>): number | null {234  const stream = controller._controlledReadableStream;235  const state = stream._state;236  if (state === 'errored') {237    return null;238  }239  if (state === 'closed') {240    return 0;241  }242  return controller._strategyHWM - controller._queueTotalSize;243}244// This is used in the implementation of TransformStream.245export function ReadableStreamDefaultControllerHasBackpressure(controller: ReadableStreamDefaultController<any>): boolean {246  if (ReadableStreamDefaultControllerShouldCallPull(controller)) {247    return false;248  }249  return true;250}251export function ReadableStreamDefaultControllerCanCloseOrEnqueue(controller: ReadableStreamDefaultController<any>): boolean {252  const state = controller._controlledReadableStream._state;253  if (!controller._closeRequested && state === 'readable') {254    return true;255  }256  return false;257}258export function SetUpReadableStreamDefaultController<R>(stream: ReadableStream<R>,259                                                        controller: ReadableStreamDefaultController<R>,260                                                        startAlgorithm: () => void | PromiseLike<void>,...

readable_stream_controller.ts

Source:readable_stream_controller.ts

...127}128export function ReadableStreamDefaultControllerCallPullIfNeeded<T>(129  controller: ReadableStreamDefaultController<T>130) {131  const shouldPull = ReadableStreamDefaultControllerShouldCallPull(controller);132  if (!shouldPull) {133    return;134  }135  if (controller.pulling) {136    controller.pullAgain = true;137    return;138  }139  Assert(!controller.pullAgain);140  controller.pulling = true;141  controller142    .pullAlgorithm()143    .then(() => {144      controller.pulling = false;145      if (controller.pullAgain) {146        controller.pullAgain = false;147        ReadableStreamDefaultControllerCallPullIfNeeded(controller);148      }149    })150    .catch(r => {151      ReadableStreamDefaultControllerError(controller, r);152    });153}154export function ReadableStreamDefaultControllerShouldCallPull<T>(155  controller: ReadableStreamDefaultController<T>156) {157  const stream = controller.controlledReadableStream;158  if (!ReadableStreamDefaultControllerCanCloseOrEnqueue(controller)) {159    return false;160  }161  if (!controller.started) {162    return false;163  }164  if (165    IsReadableStreamLocked(stream) &&166    ReadableStreamGetNumReadRequests(stream) > 0167  ) {168    return true;169  }170  const desiredSize = ReadableStreamDefaultControllerGetDesiredSize(controller);171  Assert(desiredSize !== null);172  return desiredSize > 0;173}174export function ReadableStreamDefaultControllerClearAlgorithms<T>(175  controller: ReadableStreamDefaultController<T>176) {177  controller.pullAlgorithm = void 0;178  controller.cancelAlgorithm = void 0;179  controller.strategySizeAlgorithm = void 0;180}181export function ReadableStreamDefaultControllerClose<T>(controller) {182  const stream = controller.controlledReadableStream;183  Assert(ReadableStreamDefaultControllerCanCloseOrEnqueue(controller));184  controller.closeRequested = true;185  if (controller.queue.length === 0) {186    ReadableStreamDefaultControllerClearAlgorithms(controller);187    ReadableStreamClose(stream);188  }189}190export function ReadableStreamDefaultControllerEnqueue<T>(controller, chunk) {191  if (IsReadableStreamDefaultController(controller)) {192    const stream = controller.controlledReadableStream;193    Assert(ReadableStreamDefaultControllerCanCloseOrEnqueue(controller));194    if (195      IsReadableStreamLocked(stream) &&196      ReadableStreamGetNumReadRequests(stream) > 0197    ) {198      ReadableStreamFulfillReadRequest(stream, chunk, false);199    } else {200      let result: number;201      try {202        result = controller.strategySizeAlgorithm(chunk);203      } catch (e) {204        ReadableStreamDefaultControllerError(controller, e);205        return e;206      }207      const chunkSize = result;208      try {209        EnqueueValueWithSize(controller, chunk, chunkSize);210      } catch (e) {211        ReadableStreamDefaultControllerError(controller, e);212        return e;213      }214      ReadableStreamDefaultControllerCallPullIfNeeded(controller);215    }216  }217}218export function ReadableStreamDefaultControllerError<T>(controller, e) {219  if (IsReadableStreamDefaultController(controller)) {220    const stream = controller.controlledReadableStream;221    if (stream.state !== "readable") {222      return;223    }224    ResetQueue(controller);225    ReadableStreamDefaultControllerClearAlgorithms(controller);226    ReadableStreamError(stream, e);227  }228}229export function ReadableStreamDefaultControllerGetDesiredSize<T>(230  controller: ReadableStreamDefaultController<T>231): number | null {232  const stream = controller.controlledReadableStream;233  const state = stream.state;234  if (state === "errored") {235    return null;236  }237  if (state === "closed") {238    return 0;239  }240  return controller.strategyHWM - controller.queueTotalSize;241}242export function ReadableStreamDefaultControllerHasBackpressure<T>(243  controller: ReadableStreamDefaultController<T>244): boolean {245  return !ReadableStreamDefaultControllerShouldCallPull(controller);246}247export function ReadableStreamDefaultControllerCanCloseOrEnqueue<T>(248  controller: ReadableStreamDefaultController<T>249): boolean {250  const state = controller.controlledReadableStream.state;251  return !controller.closeRequested && state === "readable";252}253export function SetUpReadableStreamDefaultController<T>(params: {254  stream: ReadableStream;255  controller: ReadableStreamDefaultController<T>;256  startAlgorithm: StartAlgorithm;257  pullAlgorithm: PullAlgorithm;258  cancelAlgorithm: CancelAlgorithm;259  highWaterMark: number;...

Using AI Code Generation

1const { ReadableStream, CountQueuingStrategy } = require('stream/web');2const assert = require('assert');3const rs = new ReadableStream({4  start(controller) {5    controller.enqueue('a');6    controller.enqueue('b');7    controller.close();8  }9}, new CountQueuingStrategy({ highWaterMark: 2 }));10const reader = rs.getReader();11const read = () => reader.read()12  .then(({ value, done }) => {13    if (done) return;14    console.log(value);15    return read();16  });17read().then(() => console.log('done'));

Using AI Code Generation

1import { ReadableStream, CountQueuingStrategy } from 'streams';2const rs = new ReadableStream({3  start(controller) {4    controller.enqueue('a');5    controller.enqueue('b');6    controller.enqueue('c');7  },8  pull(controller) {9    controller.enqueue('d');10    controller.close();11  }12}, new CountQueuingStrategy({ highWaterMark: 3 }));13const reader = rs.getReader();14const read = () => reader.read().then(result => {15  if (result.done) {16    console.log('done');17    return;18  }19  console.log('value: ' + result.value);20  return read();21});22read();

Using AI Code Generation

1import { ReadableStream, CountQueuingStrategy } from 'streams';2const rs = new ReadableStream({3  start(controller) {4    controller.enqueue('a');5    controller.enqueue('b');6    controller.close();7  }8}, new CountQueuingStrategy({ highWaterMark: 5 }));9const reader = rs.getReader();10const read = () => {11  return reader.read().then(({ value, done }) => {12    if (done) {13      return undefined;14    }15    console.log(value);16    return read();17  });18};19read().then(() => console.log('done reading'));

Using AI Code Generation

1import { ReadableStream, CountQueuingStrategy } from 'streams';2const rs = new ReadableStream({3  start(controller) {4    controller.enqueue('a');5    controller.enqueue('b');6  },7  pull(controller) {8    controller.enqueue('c');9  },10}, new CountQueuingStrategy({ highWaterMark: 5 }));11const reader = rs.getReader();12const result = reader.read().then(({ value, done }) => {13  console.log(value);14  console.log(done);15  return reader.read();16}).then(({ value, done }) => {17  console.log(value);18  console.log(done);19  return reader.read();20}).then(({ value, done }) => {21  console.log(value);22  console.log(done);23  return reader.read();24}).then(({ value, done }) => {25  console.log(value);26  console.log(done);27});28result.then(() => console.log('result done!'));29import { ReadableStream, CountQueuingStrategy } from 'streams';30const rs = new ReadableStream({31  start(controller) {32    controller.enqueue('a');33    controller.enqueue('b');34  },35  pull(controller) {36    controller.enqueue('c');

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue("a");4    controller.close();5  }6});7rs.getReader().read().then(({ value, done }) => {8});9rs.getReader().read().then(({ value, done }) => {10});11var rs = new ReadableStream({12  start(controller) {13    controller.enqueue("a");14    controller.close();15  }16});17rs.getReader().read().then(({ value, done }) => {18});19rs.getReader().read().then(({ value, done }) => {20});21var rs = new ReadableStream({22  start(controller) {23    controller.enqueue("a");24    controller.close();25  }26});27rs.getReader().read().then(({ value, done }) => {28});29rs.getReader().read().then(({ value, done }) => {30});31var rs = new ReadableStream({32  start(controller) {33    controller.enqueue("a");34    controller.close();35  }36});37rs.getReader().read().then(({ value, done }) => {38});39rs.getReader().read().then(({ value, done }) => {40});41var rs = new ReadableStream({42  start(controller) {43    controller.enqueue("a");44    controller.close();45  }46});47rs.getReader().read().then(({ value, done }) => {

Using AI Code Generation

1'use strict';2const assert = require('assert');3const ReadableStream = require('stream/web').ReadableStream;4const rs = new ReadableStream({5  pull(controller) {6    controller.enqueue('a');7    controller.enqueue('b');8    controller.close();9  }10});11const reader = rs.getReader();12(async () => {13  assert.deepStrictEqual(14    await reader.read(), { value: 'a', done: false });15  assert.deepStrictEqual(16    await reader.read(), { value: 'b', done: false });17  assert.deepStrictEqual(18    await reader.read(), { value: undefined, done: true });19})();20'use strict';21const assert = require('assert');22const { ReadableStream, ReadableStreamDefaultController } = require('stream/web');23const rs = new ReadableStream({24  pull(controller) {25    controller.enqueue('a');26    controller.enqueue('b');27    controller.close();28  }29});30const reader = rs.getReader();31(async () => {32  assert.deepStrictEqual(33    await reader.read(), { value: 'a', done: false });34  assert.deepStrictEqual(35    await reader.read(), { value: 'b', done: false });36  assert.deepStrictEqual(37    await reader.read(), { value: undefined, done: true });38})();39'use strict';40require('../common');41const assert = require('assert');42const { ReadableStream, ReadableStreamDefaultController } =43  require('stream/web');44{45  const rs = new ReadableStream({46    pull(controller) {47      controller.enqueue('a');48      controller.enqueue('b');49      controller.close();50    }51  });52  const reader = rs.getReader();53  (async () => {54    assert.deepStrictEqual(55      await reader.read(), { value: 'a', done: false });56    assert.deepStrictEqual(57      await reader.read(), { value: 'b', done: false });58    assert.deepStrictEqual(59      await reader.read(), { value: undefined, done: true });60  })();61}62'use strict';63require('../common');64const assert = require('assert');65const { ReadableStream, ReadableStreamDefaultController } =

Using AI Code Generation

1'use strict';2const assert = require('assert');3const { ReadableStream, isReadableStream, ReadableStreamDefaultController,4  ReadableByteStreamController } = require('stream/web');5const { ReadableStreamDefaultReader } = require('stream/web');6const { ReadableStreamBYOBReader } = require('stream/web');7const { ReadableStreamDefaultControllerClose, ReadableStreamDefaultControllerEnqueue,8  ReadableStreamDefaultControllerCanCloseOrEnqueue, ReadableStreamDefaultControllerError } = require('stream/web');9const { ReadableByteStreamControllerClose, ReadableByteStreamControllerEnqueue,10  ReadableByteStreamControllerHasBackpressure, ReadableByteStreamControllerCanCloseOrEnqueue } = require('stream/web');11const { ByteLengthQueuingStrategy, CountQueuingStrategy } = require('stream/web');12const { WritableStream, WritableStreamDefaultWriter } = require('stream/web');13const { TransformStream, TransformStreamDefaultController,14  TransformStreamDefaultControllerFlush, TransformStreamDefaultControllerTransform } = require('stream/web');15const { WritableStreamDefaultControllerErrorIfNeeded } = require('stream/web');16const { WritableStreamDefaultControllerAbort, WritableStreamDefaultControllerCloseWithErrorPropagation,17  WritableStreamDefaultControllerHasBackpressure, WritableStreamDefaultControllerCanCloseOrEnqueue } = require('stream/web');18const { WritableStreamDefaultWriterCloseWithErrorPropagation, WritableStreamDefaultWriterRelease,19  WritableStreamDefaultWriterWrite } = require('stream/web');20const { ByteLengthQueuingStrategyCallPull, ByteLengthQueuingStrategySize } = require('stream/web');21const { CountQueuingStrategyCallPull, CountQueuingStrategySize } = require('stream/web');22const { TransformStreamDefaultControllerClearAlgorithms, TransformStreamDefaultControllerEnqueue,23  TransformStreamDefaultControllerError, TransformStreamDefaultControllerGetDesiredSize } = require('stream/web');24const {25} = require('stream/web');26const {27} = require('stream/web');28const {

Using AI Code Generation

1var rs = new ReadableStream({2  start(controller) {3    controller.enqueue('a');4    controller.enqueue('b');5  }6});7rs.getReader().read().then(result => {8  assert_equals(result.value, 'a', 'read() should fulfill with the first chunk');9  assert_false(result.done, 'read() should fulfill with done=false');10  return rs.getReader().read();11}).then(result => {12  assert_equals(result.value, 'b', 'read() should fulfill with the second chunk');13  assert_false(result.done, 'read() should fulfill with done=false');14  return rs.getReader().read();15}).then(result => {16  assert_equals(result.value, undefined, 'read() should fulfill with undefined');17  assert_true(result.done, 'read() should fulfill with done=true');18}).catch(e => {19  assert_unreached(e);20});21var byobRequest;22var rs = new ReadableStream({23  start(c) {24    byobRequest = c.byobRequest;25  }26});27var view = new Uint8Array([1, 2, 3, 4]).subarray(1, 3);28byobRequest.respondWithNewView(view);29rs.getReader({ mode: 'byob' }).read(view).then(result => {30  assert_equals(result.value.byteLength, 2, 'read() should fulfill with a view of the right length');31  assert_array_equals(new Uint8Array(result.value), new Uint8Array([2, 3]),32                      'read() should fulfill with a view of the right content');33  assert_false(result.done, 'read() should fulfill with done=false');34}).catch(e => {35  assert_unreached(e);36});37var byobRequest;38var rs = new ReadableStream({39  start(c) {40    byobRequest = c.byobRequest;41  }42});43var view = new Uint8Array([1, 2, 3, 4]).subarray(

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