Hides watched videos from your YouTube subscriptions page.
目前為
// ==UserScript==
// @name YouTube: Hide Watched Videos
// @version 0.1
// @description Hides watched videos from your YouTube subscriptions page.
// @author Chocospleen
// @grant GM_addStyle
// @include http://*.youtube.com/*
// @include http://youtube.com/*
// @include https://*.youtube.com/*
// @include https://youtube.com/*
// @namespace https://greasyfork.org/users/59385
// ==/UserScript==
(function (undefined) {
GM_addStyle("\
.GR-WATCHED {\
display: none;\
}\
.GR-BUTTON {\
cursor: pointer;\
position: fixed;\
right: 80px;\
top: 10px;\
}\
.GR-BUTTON-LABEL {\
pointer-events: none;\
}\
.GR-BUTTON-CHECKBOX {\
pointer-events: none;\
margin-right: 10px;\
vertical-align: -3px;\
}\
");
// ===========================================================
var findWatchedElements = function () {
return document.getElementsByClassName('watched');
};
// ===========================================================
var findParentByClass = function(el, cls) {
while ((el = el.parentElement) && !el.classList.contains(cls));
return el;
};
// ===========================================================
var findButtonTarget = function () {
return document.getElementById('browse-items-primary');
};
// ===========================================================
var isButtonAlreadyThere = function () {
var button = document.getElementsByClassName('GR-BUTTON');
return button && button.length;
};
// ===========================================================
var addClassToWatchedRows = function () {
var items = findWatchedElements() || [];
for (var i = 0, l = items.length; i < l; i++) {
var item = items[i];
// "Subscription" section needs us to hide the "feed-item-container",
// but in the "Trending" section, that class will hide everything.
// So there, we need to hide the "expanded-shelf-content-item-wrapper"
var row;
if (window.location.href.indexOf('/feed/subscriptions') > 0) {
row = findParentByClass(item, 'feed-item-container');
} else {
row = findParentByClass(item, 'expanded-shelf-content-item-wrapper');
}
var gridItem = findParentByClass(item, 'yt-shelf-grid-item');
// If we're in grid view, we will hide the "grid" item,
// otherwise we'll hide the item row
var itemToHide = gridItem ? gridItem : row;
if (localStorage.GRWATCHED === 'true') {
itemToHide.classList.add('GR-WATCHED');
} else {
itemToHide.classList.remove('GR-WATCHED');
}
}
};
// ===========================================================
var addCheckboxButton = function () {
if (isButtonAlreadyThere()) return;
// Find button target
var target = findButtonTarget();
if (!target) return;
// Add label
var label = document.createElement('label');
label.className = 'GR-BUTTON-LABEL';
// Add checkbox
var checkbox = document.createElement('input');
checkbox.checked = localStorage.GRWATCHED === 'true' ? 'checked' : null;
checkbox.className = 'GR-BUTTON-CHECKBOX';
checkbox.type = 'checkbox';
label.appendChild(checkbox);
// Add label text
var textnode = document.createTextNode("Hide Watched");
label.appendChild(textnode);
// Create <button>
var button = document.createElement('button');
button.className = 'yt-uix-button yt-uix-button-size-default yt-uix-button-default yt-uix-button-has-icon yt-uix-button-reverse inq-no-click GR-BUTTON';
button.appendChild(label);
button.addEventListener('click', function (event) {
var value = localStorage.GRWATCHED === 'true' ? 'false' : 'true';
localStorage.GRWATCHED = value;
console.log(localStorage.GRWATCHED, Boolean(localStorage.GRWATCHED), value);
checkbox.checked = value === 'true';
addClassToWatchedRows();
});
target.appendChild(button);
};
var run = function () {
addClassToWatchedRows();
addCheckboxButton();
};
// ===========================================================
// Hijack all XHR calls
var send = XMLHttpRequest.prototype.send;
XMLHttpRequest.prototype.send = function (data) {
this.addEventListener("readystatechange", function () {
if (
// Anytime more videos are fetched -- re-run script
this.responseURL.indexOf('browse_ajax?action_continuation') > 0
) {
setTimeout(function () {
run();
}, 0);
}
}, false);
send.call(this, data);
};
// ===========================================================
var observeDOM = (function(){
var MutationObserver = window.MutationObserver || window.WebKitMutationObserver,
eventListenerSupported = window.addEventListener;
return function(obj, callback){
if( MutationObserver ){
// define a new observer
var obs = new MutationObserver(function(mutations, observer){
if( mutations[0].addedNodes.length || mutations[0].removedNodes.length )
callback();
});
// have the observer observe foo for changes in children
obs.observe( obj, { childList:true, subtree:true });
}
else if( eventListenerSupported ){
obj.addEventListener('DOMNodeInserted', callback, false);
obj.addEventListener('DOMNodeRemoved', callback, false);
}
};
})();
// YouTube does weird things during navigation. This seems to be the only reliable way to
// check when user moves from one page to another.
observeDOM(document.body, function () {
run();
});
// ===========================================================
run();
}());