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RemovePttSignatures.user.js
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RemovePttSignatures.user.js
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// ==UserScript==
// @name RemovePttSignatures
// @namespace Yr
// @version 1.1
// @description Remove annoying signatures in ptt
// @author Yr
// @match https://www.ptt.cc/bbs/*/*.html
// @icon https://www.google.com/s2/favicons?sz=64&domain=ptt.cc
// @grant none
// ==/UserScript==
let intervalId
let removeNodes = []
let isVerbose = false // dev debug flag
function FindSpecificElement (node, notMatchCallback = _ => { }) {
// find '--' element
while (node) {
node = node.previousSibling;
if (node && node.textContent.trim().includes('--')) {
break
}
notMatchCallback(node)
}
return node
}
function toggle () {
for (const node of removeNodes) {
if (node.style) {
if (node.style.display != 'none') {
node.style.display = 'none'
}
else {
node.style.display = ''
// special deal lazy loaded images
for (const child of node.childNodes) {
if (child.style && child.style.width == '0px') {
child.style.width = ''
}
}
}
}
}
}
function log (msg) {
if (isVerbose) {
console.log(msg)
}
}
function Run () {
log('checking ...')
let identifer = [...document.querySelectorAll('span.f2')][0]
// find end '--' element
identifer = FindSpecificElement(identifer)
log(`end = `);
log(identifer);
// find start '--' element
identifer = FindSpecificElement(identifer, e => removeNodes.push(e))
log(`start = `);
log(identifer);
// identifer is null if two '--' exists (a.k.a. signature exists)
if (identifer) {
// console.log(removeNodes)
toggle()
identifer.textContent += '\n<Signatures removed by userscript>\n'
}
clearInterval(intervalId)
log('Done, Clear interval.')
if (identifer) {
const mainDiv = document.querySelector('#main-content')
mainDiv.insertAdjacentHTML('beforebegin', `<div><button id="yrShowSignatures" style="position: fixed; z-index: 1; right: 5px;"> Show/Hide Signatures </button></div>`);
const btn = document.querySelector('#yrShowSignatures')
btn.addEventListener('click', toggle)
}
}
intervalId = setInterval(Run, 1000 * 0.5)