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popup.js
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popup.js
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function assert(...express){
const l = express.length;
const msg = (typeof express[l-1] === 'string')? express[l-1]: 'Assert Error';
for(let b of express){
if(!b){
throw new Error(msg);
}
}
}
function randBin(){
return Math.random() >= 0.5;
}
const values = "富强民主文明和谐自由平等公正法治爱国敬业诚信友善";
function str2utf8(str){
// return in hex
const notEncoded = /[A-Za-z0-9\-\_\.\!\~\*\'\(\)]/g;
const str1 = str.replace(notEncoded, c=>c.codePointAt(0).toString(16));
let str2 = encodeURIComponent(str1);
const concated = str2.replace(/%/g, '').toUpperCase();
return concated;
}
function utf82str(utfs){
assert(typeof utfs === 'string', 'utfs Error');
const l = utfs.length;
assert((l & 1) === 0);
const splited = [];
for(let i = 0; i < l; i++){
if((i & 1) === 0){
splited.push('%');
}
splited.push(utfs[i]);
}
return decodeURIComponent(splited.join(''));
}
function hex2duo(hexs){
// duodecimal in array of number
// '0'.. '9' -> 0.. 9
// 'A'.. 'F' -> 10, c - 10 a2fFlag = 10
// or 11, c - 6 a2fFlag = 11
assert(typeof hexs === 'string')
const duo = [];
for(let c of hexs){
const n = Number.parseInt(c, 16);
if(n < 10){
duo.push(n);
}else{
if(randBin()){
duo.push(10);
duo.push(n - 10);
}else{
duo.push(11);
duo.push(n - 6);
}
}
}
return duo;
}
function duo2hex(duo){
assert(duo instanceof Array);
const hex = [];
const l = duo.length;
let i = 0;
while(i < l){
if(duo[i] < 10){
hex.push(duo[i]);
}else{
if(duo[i] === 10){
i++;
hex.push(duo[i] + 10);
}else{
i++;
hex.push(duo[i] + 6);
}
}
i++;
}
return hex.map(v=>v.toString(16).toUpperCase()).join('');
}
function duo2values(duo){
return duo.map(d=>values[2*d]+values[2*d+1]).join('');
}
function valuesDecode(encoded){
const duo = [];
for(let c of encoded){
const i = values.indexOf(c);
if(i === -1){
continue;
}else if(i & 1){
continue;
}else{
// i is even
duo.push(i >> 1);
}
}
const hexs = duo2hex(duo);
assert((hexs.length & 1) === 0);
let str;
try{
str = utf82str(hexs);
}catch(e){
throw e;
}
return str;
}
function valuesEncode(str){
return duo2values(hex2duo(str2utf8(str)));
}
document.addEventListener("DOMContentLoaded", () => {
document.getElementsByTagName("body")[0].style.width = "400px";
chrome.tabs.executeScript({
code: "window.getSelection().toString();"
}, (selection) => {
document.getElementById("enc-output").innerHTML = valuesEncode(selection[0]);
document.getElementById("dec-output").innerHTML = valuesDecode(selection[0]);
});
}, false);