1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import {
BufferQueueItem,
CancelAlgorithm,
isDetachedBuffer,
isReadableByteStreamController,
PullAlgorithm,
resetQueue,
readableByteStreamControllerCallPullIfNeeded,
readableByteStreamControllerClearAlgorithms,
readableByteStreamControllerClose,
readableByteStreamControllerEnqueue,
readableByteStreamControllerError,
readableByteStreamControllerGetDesiredSize,
readableByteStreamControllerHandleQueueDrain,
readableStreamAddReadRequest,
readableStreamHasDefaultReader,
readableStreamGetNumReadRequests,
readableStreamCreateReadResult,
setFunctionName,
} from "./internals.ts";
import type { ReadableStreamImpl } from "./readable_stream.ts";
import * as sym from "./symbols.ts";
import { assert } from "../../util.ts";
import { customInspect } from "../console.ts";
export class ReadableByteStreamControllerImpl
implements ReadableByteStreamController {
[sym.autoAllocateChunkSize]: number | undefined;
[sym.byobRequest]: undefined;
[sym.cancelAlgorithm]: CancelAlgorithm;
[sym.closeRequested]: boolean;
[sym.controlledReadableByteStream]: ReadableStreamImpl<Uint8Array>;
[sym.pullAgain]: boolean;
[sym.pullAlgorithm]: PullAlgorithm;
[sym.pulling]: boolean;
[sym.queue]: BufferQueueItem[];
[sym.queueTotalSize]: number;
[sym.started]: boolean;
[sym.strategyHWM]: number;
private constructor() {
throw new TypeError(
"ReadableByteStreamController's constructor cannot be called."
);
}
get byobRequest(): undefined {
return undefined;
}
get desiredSize(): number | null {
if (!isReadableByteStreamController(this)) {
throw new TypeError("Invalid ReadableByteStreamController.");
}
return readableByteStreamControllerGetDesiredSize(this);
}
close(): void {
if (!isReadableByteStreamController(this)) {
throw new TypeError("Invalid ReadableByteStreamController.");
}
if (this[sym.closeRequested]) {
throw new TypeError("Closed already requested.");
}
if (this[sym.controlledReadableByteStream][sym.state] !== "readable") {
throw new TypeError(
"ReadableByteStreamController's stream is not in a readable state."
);
}
readableByteStreamControllerClose(this);
}
enqueue(chunk: ArrayBufferView): void {
if (!isReadableByteStreamController(this)) {
throw new TypeError("Invalid ReadableByteStreamController.");
}
if (this[sym.closeRequested]) {
throw new TypeError("Closed already requested.");
}
if (this[sym.controlledReadableByteStream][sym.state] !== "readable") {
throw new TypeError(
"ReadableByteStreamController's stream is not in a readable state."
);
}
if (!ArrayBuffer.isView(chunk)) {
throw new TypeError(
"You can only enqueue array buffer views when using a ReadableByteStreamController"
);
}
if (isDetachedBuffer(chunk.buffer)) {
throw new TypeError("Cannot enqueue a view onto a detached ArrayBuffer");
}
readableByteStreamControllerEnqueue(this, chunk);
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
error(error?: any): void {
if (!isReadableByteStreamController(this)) {
throw new TypeError("Invalid ReadableByteStreamController.");
}
readableByteStreamControllerError(this, error);
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
[sym.cancelSteps](reason: any): PromiseLike<void> {
// 3.11.5.1.1 If this.[[pendingPullIntos]] is not empty,
resetQueue(this);
const result = this[sym.cancelAlgorithm](reason);
readableByteStreamControllerClearAlgorithms(this);
return result;
}
[sym.pullSteps](): Promise<ReadableStreamReadResult<Uint8Array>> {
const stream = this[sym.controlledReadableByteStream];
assert(readableStreamHasDefaultReader(stream));
if (this[sym.queueTotalSize] > 0) {
assert(readableStreamGetNumReadRequests(stream) === 0);
const entry = this[sym.queue].shift();
assert(entry);
this[sym.queueTotalSize] -= entry.size;
readableByteStreamControllerHandleQueueDrain(this);
const view = new Uint8Array(entry.value, entry.offset, entry.size);
return Promise.resolve(
readableStreamCreateReadResult(
view,
false,
stream[sym.reader]![sym.forAuthorCode]
)
);
}
// 3.11.5.2.5 If autoAllocateChunkSize is not undefined,
const promise = readableStreamAddReadRequest(stream);
readableByteStreamControllerCallPullIfNeeded(this);
return promise;
}
[customInspect](): string {
return `${this.constructor.name} { byobRequest: ${String(
this.byobRequest
)}, desiredSize: ${String(this.desiredSize)} }`;
}
}
setFunctionName(
ReadableByteStreamControllerImpl,
"ReadableByteStreamController"
);
|
