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Add TheShovel/LZ-String extension (#787)
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@TheShovel
TheShovel authored Jul 30, 2023
1 parent 03db098 commit ab7141b
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296 changes: 296 additions & 0 deletions extensions/TheShovel/LZ-String.js
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(function(Scratch) {
'use strict';

/* eslint-disable */
// Code from https://github.com/pieroxy/lz-string/
// MIT License

// Copyright (c) 2013 pieroxy

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
var LZString = function() {
var r = String.fromCharCode,
o = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
n = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-$",
e = {};

function t(r, o) {
if (!e[r]) {
e[r] = {};
for (var n = 0; n < r.length; n++) e[r][r.charAt(n)] = n
}
return e[r][o]
}
var i = {
compressToBase64: function(r) {
if (null == r) return "";
var n = i._compress(r, 6, function(r) {
return o.charAt(r)
});
switch (n.length % 4) {
default:
case 0:
return n;
case 1:
return n + "===";
case 2:
return n + "==";
case 3:
return n + "="
}
},
decompressFromBase64: function(r) {
return null == r ? "" : "" == r ? null : i._decompress(r.length, 32, function(n) {
return t(o, r.charAt(n))
})
},
compressToUTF16: function(o) {
return null == o ? "" : i._compress(o, 15, function(o) {
return r(o + 32)
}) + " "
},
decompressFromUTF16: function(r) {
return null == r ? "" : "" == r ? null : i._decompress(r.length, 16384, function(o) {
return r.charCodeAt(o) - 32
})
},
compressToUint8Array: function(r) {
for (var o = i.compress(r), n = new Uint8Array(2 * o.length), e = 0, t = o.length; e < t; e++) {
var s = o.charCodeAt(e);
n[2 * e] = s >>> 8, n[2 * e + 1] = s % 256
}
return n
},
decompressFromUint8Array: function(o) {
if (null == o) return i.decompress(o);
for (var n = new Array(o.length / 2), e = 0, t = n.length; e < t; e++) n[e] = 256 * o[2 * e] + o[2 * e + 1];
var s = [];
return n.forEach(function(o) {
s.push(r(o))
}), i.decompress(s.join(""))
},
compressToEncodedURIComponent: function(r) {
return null == r ? "" : i._compress(r, 6, function(r) {
return n.charAt(r)
})
},
decompressFromEncodedURIComponent: function(r) {
return null == r ? "" : "" == r ? null : (r = r.replace(/ /g, "+"), i._decompress(r.length, 32, function(o) {
return t(n, r.charAt(o))
}))
},
compress: function(o) {
return i._compress(o, 16, function(o) {
return r(o)
})
},
_compress: function(r, o, n) {
if (null == r) return "";
var e, t, i, s = {},
u = {},
a = "",
p = "",
c = "",
l = 2,
f = 3,
h = 2,
d = [],
m = 0,
v = 0;
for (i = 0; i < r.length; i += 1)
if (a = r.charAt(i), Object.prototype.hasOwnProperty.call(s, a) || (s[a] = f++, u[a] = !0), p = c + a, Object.prototype.hasOwnProperty.call(s, p)) c = p;
else {
if (Object.prototype.hasOwnProperty.call(u, c)) {
if (c.charCodeAt(0) < 256) {
for (e = 0; e < h; e++) m <<= 1, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++;
for (t = c.charCodeAt(0), e = 0; e < 8; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1
} else {
for (t = 1, e = 0; e < h; e++) m = m << 1 | t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t = 0;
for (t = c.charCodeAt(0), e = 0; e < 16; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1
}
0 == --l && (l = Math.pow(2, h), h++), delete u[c]
} else
for (t = s[c], e = 0; e < h; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1;
0 == --l && (l = Math.pow(2, h), h++), s[p] = f++, c = String(a)
} if ("" !== c) {
if (Object.prototype.hasOwnProperty.call(u, c)) {
if (c.charCodeAt(0) < 256) {
for (e = 0; e < h; e++) m <<= 1, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++;
for (t = c.charCodeAt(0), e = 0; e < 8; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1
} else {
for (t = 1, e = 0; e < h; e++) m = m << 1 | t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t = 0;
for (t = c.charCodeAt(0), e = 0; e < 16; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1
}
0 == --l && (l = Math.pow(2, h), h++), delete u[c]
} else
for (t = s[c], e = 0; e < h; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1;
0 == --l && (l = Math.pow(2, h), h++)
}
for (t = 2, e = 0; e < h; e++) m = m << 1 | 1 & t, v == o - 1 ? (v = 0, d.push(n(m)), m = 0) : v++, t >>= 1;
for (;;) {
if (m <<= 1, v == o - 1) {
d.push(n(m));
break
}
v++
}
return d.join("")
},
decompress: function(r) {
return null == r ? "" : "" == r ? null : i._decompress(r.length, 32768, function(o) {
return r.charCodeAt(o)
})
},
_decompress: function(o, n, e) {
var t, i, s, u, a, p, c, l = [],
f = 4,
h = 4,
d = 3,
m = "",
v = [],
g = {
val: e(0),
position: n,
index: 1
};
for (t = 0; t < 3; t += 1) l[t] = t;
for (s = 0, a = Math.pow(2, 2), p = 1; p != a;) u = g.val & g.position, g.position >>= 1, 0 == g.position && (g.position = n, g.val = e(g.index++)), s |= (u > 0 ? 1 : 0) * p, p <<= 1;
switch (s) {
case 0:
for (s = 0, a = Math.pow(2, 8), p = 1; p != a;) u = g.val & g.position, g.position >>= 1, 0 == g.position && (g.position = n, g.val = e(g.index++)), s |= (u > 0 ? 1 : 0) * p, p <<= 1;
c = r(s);
break;
case 1:
for (s = 0, a = Math.pow(2, 16), p = 1; p != a;) u = g.val & g.position, g.position >>= 1, 0 == g.position && (g.position = n, g.val = e(g.index++)), s |= (u > 0 ? 1 : 0) * p, p <<= 1;
c = r(s);
break;
case 2:
return ""
}
for (l[3] = c, i = c, v.push(c);;) {
if (g.index > o) return "";
for (s = 0, a = Math.pow(2, d), p = 1; p != a;) u = g.val & g.position, g.position >>= 1, 0 == g.position && (g.position = n, g.val = e(g.index++)), s |= (u > 0 ? 1 : 0) * p, p <<= 1;
switch (c = s) {
case 0:
for (s = 0, a = Math.pow(2, 8), p = 1; p != a;) u = g.val & g.position, g.position >>= 1, 0 == g.position && (g.position = n, g.val = e(g.index++)), s |= (u > 0 ? 1 : 0) * p, p <<= 1;
l[h++] = r(s), c = h - 1, f--;
break;
case 1:
for (s = 0, a = Math.pow(2, 16), p = 1; p != a;) u = g.val & g.position, g.position >>= 1, 0 == g.position && (g.position = n, g.val = e(g.index++)), s |= (u > 0 ? 1 : 0) * p, p <<= 1;
l[h++] = r(s), c = h - 1, f--;
break;
case 2:
return v.join("")
}
// @ts-ignore
if (0 == f && (f = Math.pow(2, d), d++), l[c]) m = l[c];
else {
if (c !== h) return null;
m = i + i.charAt(0)
}
v.push(m), l[h++] = i + m.charAt(0), i = m, 0 == --f && (f = Math.pow(2, d), d++)
}
}
};
return i
}();
// @ts-ignore
"function" == typeof define && define.amd ? define(function() {
return LZString
// @ts-ignore
}) : "undefined" != typeof module && null != module ? module.exports = LZString : "undefined" != typeof angular && null != angular && angular.module("LZString", []).factory("LZString", function() {
return LZString
});
/* eslint-enable */

class lzcompress {
getInfo() {
return {
id: 'shovellzcompress',
name: 'LZ Compress',
docsURI: 'https://pieroxy.net/blog/pages/lz-string/index.html',
blocks: [{
opcode: 'compress',
blockType: Scratch.BlockType.REPORTER,
text: 'compress [TEXT] to [TYPE]',
arguments: {
TEXT: {
type: Scratch.ArgumentType.STRING,
defaultValue: 'Hello world!'
},
TYPE: {
type: Scratch.ArgumentType.STRING,
menu: 'COMPRESSIONTYPES'
}
}
},
{
opcode: 'decompress',
blockType: Scratch.BlockType.REPORTER,
text: 'decompress [TEXT] from [TYPE]',
arguments: {
TEXT: {
type: Scratch.ArgumentType.STRING,
defaultValue: '҅〶惶@✰Ӏ葀'
},
TYPE: {
type: Scratch.ArgumentType.STRING,
menu: 'COMPRESSIONTYPES'
}
}
}
],
menus: {
COMPRESSIONTYPES: {
acceptReporters: true,
items: ['Raw', 'Base64', 'EncodedURIComponent', 'Uint8Array', 'UTF16']
}
}
};
}
compress(args) {
if (args.TYPE == 'Raw') {
return LZString.compress(args.TEXT);
} else if (args.TYPE == 'Base64') {
return LZString.compressToBase64(args.TEXT);
} else if (args.TYPE == 'EncodedURIComponent') {
return LZString.compressToEncodedURIComponent(args.TEXT);
} else if (args.TYPE == 'Uint8Array') {
return LZString.compressToUint8Array(args.TEXT);
} else if (args.TYPE == 'UTF16') {
return LZString.compressToUTF16(args.TEXT);
} return '';
}

decompress(args) {
if (args.TYPE == 'Raw') {
return LZString.decompress(args.TEXT) || '';
} else if (args.TYPE == 'Base64') {
return LZString.decompressFromBase64(args.TEXT) || '';
} else if (args.TYPE == 'EncodedURIComponent') {
return LZString.decompressFromEncodedURIComponent(args.TEXT) || '';
} else if (args.TYPE == 'Uint8Array') {
return LZString.decompressFromUint8Array(args.TEXT) || '';
} else if (args.TYPE == 'UTF16') {
return LZString.decompressFromUTF16(args.TEXT) || '';
} return '';
}
}
Scratch.extensions.register(new lzcompress());
})(Scratch);
6 changes: 6 additions & 0 deletions website/index.ejs
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<p>Create and edit .zip format files, including .sb3 files. Created by <a href="https://scratch.mit.edu/users/CST1229/">CST1229</a>.</p>
</div>
<div class="extension">
<%- banner('TheShovel/LZ-String') %>
<h3>LZ Compress</h3>
<p>Compress and decompress text using <a href="https://github.com/pieroxy/lz-string">lz-string</a>.</p>
</div>
<div class="extension">
<%- banner('0832/rxFS2') %>
<h3>rxFS</h3>
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