69 lines
1.8 KiB
JavaScript
69 lines
1.8 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { Actor } = require("resource://devtools/shared/protocol.js");
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const {
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arrayBufferSpec,
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} = require("resource://devtools/shared/specs/array-buffer.js");
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/**
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* Creates an actor for the specified ArrayBuffer.
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*
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* @param {DevToolsServerConnection} conn
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* The server connection.
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* @param buffer ArrayBuffer
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* The buffer.
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*/
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class ArrayBufferActor extends Actor {
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constructor(conn, buffer) {
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super(conn, arrayBufferSpec);
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this.buffer = buffer;
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this.bufferLength = buffer.byteLength;
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// Align with ObjectActor interface
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// (this is used from eval-with-debugger)
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this.rawObj = this.buffer;
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}
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form() {
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return {
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actor: this.actorID,
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length: this.bufferLength,
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// The `typeName` is read in the source spec when reading "sourcedata"
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// which can either be an ArrayBuffer actor or a LongString actor.
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typeName: this.typeName,
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};
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}
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slice(start, count) {
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const slice = new Uint8Array(this.buffer, start, count);
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const parts = [];
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let offset = 0;
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const PortionSize = 0x6000; // keep it divisible by 3 for btoa() and join()
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while (offset + PortionSize < count) {
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parts.push(
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btoa(
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String.fromCharCode.apply(
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null,
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slice.subarray(offset, offset + PortionSize)
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)
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)
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);
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offset += PortionSize;
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}
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parts.push(
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btoa(String.fromCharCode.apply(null, slice.subarray(offset, count)))
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);
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return {
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from: this.actorID,
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encoded: parts.join(""),
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};
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}
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}
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module.exports = {
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ArrayBufferActor,
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};
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