png-exif-reader-script

/work4aiで使用するpngからExif情報を抜き出してページに書き込むscript

code:script.js

scrapbox.PageMenu.addMenu({

title: 'input image',

image: 'https://scrapbox.io/files/6327da4ef4f7ba001d8a17e0.png',

onClick: () => {

let ifelm = document.createElement("input");

ifelm.type = "file";

ifelm.onchange = function (input) {

let reader = new FileReader();

reader.onload = function () {

let result = new Uint8Array(reader.result);

let index = readbinary(result);

let txt = "";

let body = "";

for (let i = 1; i < index.length; i++) {

txt = txt + "code:" + indexi.split("\x00").join("\n ") + "\n";

}

body = encodeURI(txt)

// 新しいタブで入力

window.open(/${scrapbox.Project.name}/${scrapbox.Page.title}?body=${body})

}

reader.readAsArrayBuffer(input.target.files0);

}

ifelm.click();

}

})

// 画像のバイナリを取得

function readbinary(result) {

let k = "";

for (let i = 0; i < result.length; i++) {

k = k + readhex(resulti.toString(16));

}

let arr = k.split("tEXt");

let index = arr.map(e => {

let k = e.split("IDAT")0;

return k.slice(0, -8);

})

return index;

}

// 16進数を文字列に

function readhex(s) {

var result = "";

var tester = "";

for (var i = 0; i < s.length / 2; ++i) {

result += String.fromCharCode("0x" + s.slice(i * 2, (i + 1) * 2));

}

return result;

}