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