mirror of
https://github.com/squidfunk/mkdocs-material.git
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100 lines
2.9 KiB
TypeScript
100 lines
2.9 KiB
TypeScript
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/*
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* Copyright (c) 2016-2019 Martin Donath <martin.donath@squidfunk.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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import {
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compress,
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compressToUTF16,
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decompress,
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decompressFromUTF16
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} from "lz-string"
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import { PackerMessage, PackerMessageType } from "../_"
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/* ----------------------------------------------------------------------------
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* Data
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* ------------------------------------------------------------------------- */
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/**
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* Determine methods for packing and unpacking
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*
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* While all Webkit-based browsers can store invalid UTF-16 strings in local
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* storage, other browsers may only store valid UTF-16 strings.
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*
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* @see https://bit.ly/2Q1ArhU - LZ-String documentation
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*/
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const isWebkit = navigator.userAgent.includes("AppleWebKit")
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/* ------------------------------------------------------------------------- */
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/**
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* Method for packing
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*/
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const pack = isWebkit
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? compress
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: compressToUTF16
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/**
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* Method for unpacking
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*/
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const unpack = isWebkit
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? decompress
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: decompressFromUTF16
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/* ----------------------------------------------------------------------------
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* Functions
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* ------------------------------------------------------------------------- */
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/**
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* Message handler
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*
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* @param message - Source message
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*
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* @return Target message
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*/
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export function handler(message: PackerMessage): PackerMessage {
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switch (message.type) {
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/* Pack an unpacked string */
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case PackerMessageType.STRING:
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return {
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type: PackerMessageType.BINARY,
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data: pack(message.data)
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}
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/* Unpack a packed string */
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case PackerMessageType.BINARY:
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return {
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type: PackerMessageType.STRING,
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data: unpack(message.data)
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}
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}
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}
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/* ----------------------------------------------------------------------------
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* Worker
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* ------------------------------------------------------------------------- */
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self.addEventListener("message", ev => {
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self.postMessage(handler(ev.data))
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})
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