tutanota/libs/tensorflow-platform-stub.js
das f69466a713 Add tensorflow.js library
Reviewed by jhm, abp, das.

The library is added to support training a spam classification model on
client. A custom rollupTensorFlow was created to only use the needed
methods on the final file, which also has multiple stubs which remove
code which is unwanted such as Requests.

Co-authored-by: jhm <17314077+jomapp@users.noreply.github.com>
Co-authored-by: abp <abp@tutao.de>
2025-10-14 12:32:04 +02:00

85 lines
2.6 KiB
JavaScript
Vendored

// This env import is causing a circular dependency, which we are OK with
import {env} from "@tensorflow/tfjs-core";
// We always set the platform to be PlatformBrowser
// We use a timeout to make sure the env is already initialized before setting the platform
setTimeout(() => env().setPlatform('browser', new PlatformStub()))
/**
* @license
* Copyright 2023 Google LLC.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* =============================================================================
*/
export function isTypedArrayBrowser(a) {
return a instanceof Float32Array || a instanceof Int32Array ||
a instanceof Uint8Array || a instanceof Uint8ClampedArray;
}
export class PlatformStub {
constructor() {
}
fetch(path, init) {
throw new Error("fetch is not supported in this build.");
}
now() {
return performance.now();
}
encode(text, encoding) {
if (encoding !== 'utf-8' && encoding !== 'utf8') {
throw new Error(`Browser's encoder only supports utf-8, but got ${encoding}`);
}
if (this.textEncoder == null) {
this.textEncoder = new TextEncoder();
}
return this.textEncoder.encode(text);
}
decode(bytes, encoding) {
return new TextDecoder(encoding).decode(bytes);
}
setTimeoutCustom(functionRef, delay) {
if (typeof window === 'undefined' ||
!env().getBool('USE_SETTIMEOUTCUSTOM')) {
setTimeout(functionRef, delay);
return;
}
this.functionRefs.push(functionRef);
setTimeout(() => {
window.postMessage({name: this.messageName, index: this.functionRefs.length - 1}, location.origin);
}, delay);
if (!this.hasEventListener) {
this.hasEventListener = true;
window.addEventListener('message', (event) => {
if (event.source === window && event.data.name === this.messageName) {
event.stopPropagation();
const functionRef = this.functionRefs[event.data.index];
functionRef();
this.handledMessageCount++;
if (this.handledMessageCount === this.functionRefs.length) {
this.functionRefs = [];
this.handledMessageCount = 0;
}
}
}, true);
}
}
isTypedArray(a) {
return isTypedArrayBrowser(a)
}
}