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Automatically removes email signature for free users of ProtonMail
目前为
// ==UserScript==
// @name ProtonMail Signature Remover
// @description Automatically removes email signature for free users of ProtonMail
// @version 2.0.0
// @author guihkx
// @match https://mail.protonmail.com/*
// @run-at document-idle
// @license MIT; https://opensource.org/licenses/MIT
// @namespace https://github.com/guihkx
// @icon https://mail.protonmail.com/assets/coast-228x228.png
// @homepageURL https://github.com/guihkx/user-scripts
// @supportURL https://github.com/guihkx/user-scripts/issues
// ==/UserScript==
/**
* Changelog:
*
* @version 2.0.1
* - Fixed signature not being removed in the HTML composer ("rich text editor").
* - Added logging for when a signature is found and removed.
*
* @version 2.0.0
* - Huge code rewrite
* - Remove support for old.protonmail.com (Sorry!)
* - Now removes the signature from both HTML and text-based emails (previously it could only do HTML-based ones)
* - Updated script icon
*
* @version 1.0.0:
* - First release
*/
;(() => {
let composerContainer
const id = setInterval(() => {
composerContainer = document.querySelector('div.composer-container')
if (composerContainer === null) {
return
}
clearInterval(id)
log('Ready.')
const composerContainerMonitor = new MutationObserver(observeComposerContainer)
composerContainerMonitor.observe(composerContainer, {
childList: true
})
}, 500)
function observeComposerContainer (mutations) {
for (const mutation of mutations) {
for (const addedNode of mutation.addedNodes) {
if (addedNode.nodeType !== 1) {
continue
}
// Determine if this is a text-only email.
const textareaEmailBody = addedNode.querySelector('textarea[data-testid="squire-textarea"]')
if (textareaEmailBody !== null) {
log('A text-only email composer has been rendered.')
// Although at this point the text-only email composer has been rendered,
// the textarea that contains the email body will still be empty.
// As I couldn't figure out a proper way to determine when the textarea has been filled,
// this ugly, hacky approach keeps monitoring the textarea until its value is not empty anymore.
removeTextSignature(textareaEmailBody)
return
}
// This is a HTML-based email.
const composerFrame = addedNode.querySelector('iframe.squireIframe')
if (composerFrame === null) {
continue
}
log('A HTML email composer has been rendered.')
// In my tests, this frame's readyState will be set to 'uninitialized' on Firefox.
// In Chromium-based browsers, it's immediately set to 'complete'.
if (composerFrame.contentDocument.readyState === 'complete') {
setupHTMLComposerObserver(composerFrame)
return
}
log('composerFrame\'s readyState is not \'complete\' yet. Listening to DOMContentLoaded.')
composerFrame.contentWindow.addEventListener('DOMContentLoaded', () => {
setupHTMLComposerObserver(composerFrame)
})
return
}
}
}
function removeTextSignature (textareaEmailBody) {
const textSignature = /\n\n^Sent with ProtonMail Secure Email\.$/m
// Monitors the textarea containing the text-based email body.
// Runs at every 100ms and stops once the textarea's value is not empty.
const id = setInterval(() => {
if (textareaEmailBody.value === '') {
return
}
if (!textSignature.test(textareaEmailBody.value)) {
clearInterval(id)
return
}
clearInterval(id)
textareaEmailBody.value = textareaEmailBody.value.replace(textSignature, '')
log('Signature successfully removed from text-only email.')
// Move the text cursor back to the beginning of the textarea.
textareaEmailBody.setSelectionRange(0, 0)
}, 100)
}
function setupHTMLComposerObserver (composerFrame) {
const htmlComposerMonitor = new MutationObserver(observeHTMLComposerBody)
htmlComposerMonitor.observe(composerFrame.contentDocument.body, {
childList: true
})
}
function observeHTMLComposerBody (mutations, observer) {
for (const mutation of mutations) {
for (const addedNode of mutation.addedNodes) {
if (addedNode.nodeType !== 1) {
continue
}
if (addedNode.id !== 'squire') {
continue
}
// We found our frame, no need to keep observing.
observer.disconnect()
const emailBodyMonitor = new MutationObserver(removeHTMLSignature)
emailBodyMonitor.observe(addedNode, {
childList: true
})
return
}
}
}
function removeHTMLSignature (mutations, observer) {
for (const mutation of mutations) {
for (const addedNode of mutation.addedNodes) {
if (addedNode.nodeType !== 1) {
continue
}
const signatureNode = addedNode.querySelector('div.protonmail_signature_block')
if (!signatureNode) {
continue
}
observer.disconnect()
// The signature block consists of 3 main nodes:
//
// <div><br></div>
// <div><br></div>
// <div class="protonmail_signature_block">
// <div class="protonmail_signature_block-user protonmail_signature_block-empty"></div>
// <div class="protonmail_signature_block-proton">Sent with <a href="https://protonmail.com/" target="_blank">ProtonMail</a> Secure Email.</div>
// </div>
//
// The following loop removes the first two blank lines preceding the ProtonMail signature node itself.
for (let i = 0; i < 2; i++) {
const prevSiblingNode = signatureNode.previousElementSibling
if (prevSiblingNode === null || prevSiblingNode.tagName !== 'DIV') {
break
}
const blankLine = prevSiblingNode.firstElementChild
if (blankLine === null || blankLine.tagName !== 'BR') {
break
}
prevSiblingNode.remove()
}
// Finally, remove the signature node itself.
signatureNode.remove()
log('Signature successfully removed from HTML email.')
return
}
}
}
function log () {
console.log('[ProtonMail Signature Remover]', ...arguments)
}
})()