/** * Make a page more readable by disabling all page styling and applying a * bare minimum of our own. Go to the first thing that looks like the start * of the actual content so no time is wasted scrolling past initial * navigation etc. * * @title Readable++ */ (function read() { /* Create a new IFRAME to get a "clean" Window object, so we can use its * console. Sometimes sites (e.g. Twitter) override console.log and even * the entire console object. "delete console.log" or "delete console" * does not always work, and messing with the prototype seemed more * brittle than this. */ var console = (function () { var iframe = document.getElementById('xxxJanConsole'); if (!iframe) { iframe = document.createElementNS('http://www.w3.org/1999/xhtml', 'iframe'); iframe.id = 'xxxJanConsole'; iframe.style.display = 'none'; (document.body || document.documentElement).appendChild(iframe); } return iframe && iframe.contentWindow && iframe.contentWindow.console || { log: function () {} }; })(); /* The style sheet for more readable content. */ var css = (function () { /*@charset "utf-8"; @namespace svg "http://www.w3.org/2000/svg"; -jancss-comment { content: "General styles -------------------------------------------"; } * { line-height: 1.5; } html { background: rgb(245, 245, 225); color: rgb(0, 0, 30); } body { max-width: 48em; margin: 0 auto; padding: 1em; font-family: "Calibri", sans-serif; font-size: 1.05rem; } p { line-height: 1.7; } :link { color: #00e; } :visited { color: #528; } :link:focus, :visited:focus, :link:hover, :visited:hover { color: #e30; } :link:active, :visited:active { color: #e00; } center, [align] { text-align: left; } b:not(.jancss-probably-structure), u, blink { font-weight: inherit; font-style: inherit; text-decoration: inherit } b.jancss-probably-structure { font-size: larger; } .jancss-probably-layout { font: inherit; } -jancss-comment { content: "Headers --------------------------------------------------"; } h1:not(.jancss-probably-layout), h2:not(.jancss-probably-layout), h3:not(.jancss-probably-layout) { font-family: "Cambria", serif; } h1, h1.jancss-probably-layout { border-bottom: 1px solid #888; font-size: 200%; font-weight: 100; } h2, h2.jancss-probably-layout * { border-bottom: 1px solid #bbb; font-size: 150%; font-weight: 100; } h3, h3.jancss-probably-layout { border-bottom: 1px dotted #bbb; font-size: 117%; font-weight: 100; } h1.jancss-probably-layout *, h2.jancss-probably-layout *, h3.jancss-probably-layout * { font-size: 1rem; } -jancss-comment { content: "Links in headers (probably permalinks) -------------------"; } h1 a[href]:not(:hover), h2 a[href]:not(:hover), h3 a[href]:not(:hover) { text-decoration: none; } h1 a[href]::after, h2 a[href]::after, h3 a[href]::after { font-size: 75%; content: " #"; } -jancss-comment { content: "Pre-formatted text and source code -----------------------"; } pre { padding: 1ex; border: 1px dotted; } code, pre, .syntaxhighlighter, .dp-highlighter { font-family: "Consolas", monospace; font-size: small; background: #ffe; } .dp-highlighter + pre[name="code"] { display: none; } -jancss-comment { content: "Forms ----------------------------------------------------"; } textarea { width: 100%; height: 32ex; } -jancss-comment { content: "Tables ---------------------------------------------------"; } table.jancss-probably-for-data th, table.jancss-probably-for-data td { vertical-align: top; text-align: left; padding: 0.5ex; } table.jancss-probably-for-data caption { font-weight: bold; border-bottom: 1px dotted; } table.jancss-probably-for-layout td { display: inline-block; } table.jancss-probably-for-data tr:nth-child(odd) td:not(.jancss-active-col) { background: #ffe; } table.jancss-probably-for-data tr:hover td:not(.code), table.jancss-probably-for-data .jancss-active-col { background: #ffc; } table.jancss-probably-for-data th, table.jancss-probably-for-data tr td:not(.code):hover { background: #ff9; } table.jancss-probably-for-data th code, table.jancss-probably-for-data td code { background: inherit; } -jancss-comment { content: "Make images use the full page width ----------------------"; } img, input[type="image"], object, embed, video, audio, iframe, canvas, :not(svg|*) > svg|* { max-width: 100%; } figure { margin: 0; } iframe { width: 100%; } iframe[class*="twitter"] { min-height: 15em; } -jancss-comment { content: "Dim images and media until :hover ------------------------"; } body:not(:hover) img, body:not(:hover) input[type="image"], body:not(:hover) object, body:not(:hover) embed, body:not(:hover) video, body:not(:hover) audio, body:not(:hover) iframe, body:not(:hover) canvas, body:not(:hover) :not(svg|*) > svg|* { opacity: 0.25; } -jancss-comment { content: "Limit icon dimensions --------------------------------"; } a[href*="facebook.com"] svg, a[href*="instagram.com"] svg, a[href*="twitter.com"] svg, a[href*=".pinterest."] svg, svg[id*="icon"], svg[class*="icon"], svg[class*="inline"], svg[data-icon], svg[role="img"], [class*="icon"] svg, [class*="Icon"] svg, img[class*="icon"][src*=".svg"], img[class*="Icon"][src*=".svg"], span > svg, button svg, [class*="button"] svg, [role*="button"] svg, [class*="controls"] svg, .svg-icon, .inline-icon, .wp-smiley, .smiley, .emoticon, :not(html).emoji { max-width: 1.4em; max-height: 1.4em; } -jancss-comment { content: "Make everything scrollable -------------------------------"; } [style*="position: fixed"], [style*="position:fixed"] { position: static !important; } -jancss-comment { content: "Make side notes and pull quotes less conspicuous ---------"; } aside:not(:hover), [data-expander-id], [id^="footnote_plugin_tooltip_text_"]:not(:hover), blockquote[class*="quote"]:not(:hover), q[class*="pull"]:not(:hover), blockquote[class*="pull"]:not(:hover), .quote-box:not(:hover), .su-pullquote:not(:hover), .pullquote:not(:hover), .pullQuote:not(:hover), .pull-quote:not(:hover) { opacity: 0.25; } -jancss-comment { content: "Decrease common forum and metadata font size -------------"; } .postprofile, .signature { font-size: smaller; border-top: 1px dotted; opacity: 0.5; } -jancss-comment { content: "Hide common social media elements ------------------------"; } iframe[src*=".facebook.com/"], iframe[src*=".twitter.com/widgets/"], iframe[src*="//plusone.google.com/_/+1/"], iframe[src*="//www.reddit.com/static/button/"], iframe[src*="//s7.addthis.com/"], iframe[src*="//www.stumbleupon.com/badge/embed/"], iframe[src*="//widgets.bufferapp.com/"] { width: 12em; height: 4ex; border: 1px dotted; } .twtr-widget.twtr-scroll { max-height: 30ex; overflow: auto; } .article__share { display: none; } #social_btns { display: none; } .taboola { display: none; } .social-media > .share { display: none; } :-moz-any( div, ul, li ):-moz-any( :-moz-any( [id*="social"], [id*="Social"] ):-moz-any( [id*="media"], [id*="Media"] ):-moz-any( [id*="share"], [id*="Share"], [id*="sharing"], [id*="Sharing"] ), :-moz-any( [id*="social"], [id*="Social"] [id*="share"], [id*="Share"], [id*="sharing"], [id*="Sharing"] ):-moz-any( [id*="toolbar"], [id*="Toolbar"], [id*="buttons"], [id*="Buttons"], ), :-moz-any( [class*="social"], [class*="Social"] ):-moz-any( [class*="media"], [class*="Media"] ):-moz-any( [class*="share"], [class*="Share"], [class*="sharing"], [class*="Sharing"] ), :-moz-any( [class*="social"], [class*="Social"] [class*="share"], [class*="Share"], [class*="sharing"], [class*="Sharing"] ):-moz-any( [class*="toolbar"], [class*="Toolbar"], [class*="buttons"], [class*="Buttons"], ) ) { display: none; } :matches( div, ul, li ):matches( :matches( [id*="social"], [id*="Social"] ):matches( [id*="media"], [id*="Media"] ):matches( [id*="share"], [id*="Share"], [id*="sharing"], [id*="Sharing"] ), :matches( [id*="social"], [id*="Social"] [id*="share"], [id*="Share"], [id*="sharing"], [id*="Sharing"] ):matches( [id*="toolbar"], [id*="Toolbar"], [id*="buttons"], [id*="Buttons"], ), :matches( [class*="social"], [class*="Social"] ):matches( [class*="media"], [class*="Media"] ):matches( [class*="share"], [class*="Share"], [class*="sharing"], [class*="Sharing"] ), :matches( [class*="social"], [class*="Social"] [class*="share"], [class*="Share"], [class*="sharing"], [class*="Sharing"] ):matches( [class*="toolbar"], [class*="Toolbar"], [class*="buttons"], [class*="Buttons"], ) ) { display: none; } -jancss-comment { content: "Hide ad elements that slipped through my ad blocker ------"; } iframe[id^="google_ads_"] { display: none; } -jancss-comment { content: "Hide empty list items ------------------------------------"; } li:empty, li.jancss-emptyish { display: none; } -jancss-comment { content: "Make common navigation elements more compact -------------"; } :-moz-any( nav, body [class*="avigat"], body [id*="avigat"], body [class*="-nav-"], body [class*="nav-"], body [class$="-nav"], body [id*="-nav-"], body [id*="nav-"], body [id$="-nav"], body [role="navigation"] ) ul { display: inline; margin: 0; padding: 0; } :-webkit-any( nav, body [class*="avigat"], body [id*="avigat"], body [class*="-nav-"], body [class*="nav-"], body [class$="-nav"], body [id*="-nav-"], body [id*="nav-"], body [id$="-nav"], body [role="navigation"] ) ul { display: inline; margin: 0; padding: 0; } :any( nav, body [class*="avigat"], body [id*="avigat"], body [class*="-nav-"], body [class*="nav-"], body [class$="-nav"], body [id*="-nav-"], body [id*="nav-"], body [id$="-nav"], body [role="navigation"] ) ul { display: inline; margin: 0; padding: 0; } :-moz-any( nav, body [class*="avigat"], body [id*="avigat"], body [class*="-nav-"], body [class*="nav-"], body [class$="-nav"], body [id*="-nav-"], body [id*="nav-"], body [id$="-nav"], body [role="navigation"] ) li { display: inline; margin: 0; padding: 0 .5em; border-right: 1px dotted; } :-webkit-any( nav, body [class*="avigat"], body [id*="avigat"], body [class*="-nav-"], body [class*="nav-"], body [class$="-nav"], body [id*="-nav-"], body [id*="nav-"], body [id$="-nav"], body [role="navigation"] ) li { display: inline; margin: 0; padding: 0 .5em; border-right: 1px dotted; } :any( nav, body [class*="avigat"], body [id*="avigat"], body [class*="-nav-"], body [class*="nav-"], body [class$="-nav"], body [id*="-nav-"], body [id*="nav-"], body [id$="-nav"], body [role="navigation"] ) li { display: inline; margin: 0; padding: 0 .5em; border-right: 1px dotted; } -jancss-comment { content: "Hide old cufón text replacement --------------------------"; } .cufon-canvas canvas { display: none; } -jancss-comment { content: "Make notes on decorrespondent.nl less conspicuous --------"; } .contentitem-sidenote:not(:hover) > :not(.contentitem-sidenote-snippet), .contentitem-infocard-toggle-container + .contentitem-infocard-contents:not(:hover) { opacity: 0.25; } .contentitem-sidenote:hover > :not(.contentitem-sidenote-snippet), .contentitem-infocard-toggle-container + .contentitem-infocard-contents:hover { background: #ffc; } -jancss-comment { content: "Hide the source text on Google Translate-d pages ---------"; } .google-src-text { display: none; } -jancss-comment { content: "Hide big ScrollMagic spacers, e.g. on Co.Design ----------"; } .scrollmagic-pin-spacer { display: none; } -jancss-comment { content: "Always hide our IFRAME used to restore console.log -------"; } #xxxJanConsole { display: none; } */; }).toString() .replace(/^function\s*\(\s*\)\s*\{\s*\/\*/, '') .replace(/\*\/\s*\;?\s*\}\s*$/, ''); /* The attributes to disable. */ var attrs = [ 'style', 'background', 'bgcolor', 'color', 'text', 'link', 'vlink', 'alink', 'hlink', 'table@width', 'colgroup@width', 'col@width', 'tr@width', 'td@width', 'th@width', 'table@height', 'tr@height', 'td@height', 'th@height', 'img@width', 'img@height', 'border', 'frameborder', 'align', 'face', 'font@size', 'basefont@size' ]; /* Elements to remove completely. */ var elementsToRemoveSelectors = [ '.bt-popin' /* Used on standaard.be. */ ]; /* The selectors to try for the header elements, whose text content will be compared to the page title. The last match wins. */ var headerSelectors = [ '[class*="head"]:not(:empty)', '[class*="Head"]:not(:empty)', '[id*="head"]:not(:empty)', '[id*="Head"]:not(:empty)', '[role="heading"]', '[class*="title"]:not(:empty)', '[class*="Title"]:not(:empty)', 'h1:not(:empty), h2:not(:empty), h3:not(:empty)', 'h1:not(:empty)[itemprop~="name"], h2:not(:empty)[itemprop~="name"], h3:not(:empty)[itemprop~="name"]', 'h1:not(:empty)[itemprop~="headline"], h2:not(:empty)[itemprop~="headline"], h3:not(:empty)[itemprop~="headline"]' ]; var ancestorsForHeadersToIgnoreSelectors = [ 'aside', '.related-posts', '.article-slider', '.article-drawer' ]; /* The selectors to try (in this order) for the first content element to scroll to when no suitable header was found. */ var contentSelectors = [ /* The most semantically rich elements should be used correctly so we * can ass-u-me them to be the main content element, right? */ 'main h1:not(:empty)', 'main header', 'main h2:not(:empty)', 'main', 'body [itemprop="blogPost"] h1:not(:empty)', 'body [itemprop="blogPost"] header', 'body [itemprop="blogPost"] h2:not(:empty)', 'body [itemprop="blogPost"]', 'body [role="main"] h1:not(:empty)', 'body [role="main"] header', 'body [role="main"] h2:not(:empty)', 'body [role="main"]', 'body [role="document"] h1:not(:empty)', 'body [role="document"] header', 'body [role="document"] h2:not(:empty)', 'body [role="document"]', 'body [role="article"] h1:not(:empty)', 'body [role="article"] header', 'body [role="article"] h2:not(:empty)', 'body [role="article"]', 'body #main h1:not(:empty)', 'body #main header', 'body #main h2:not(:empty)', 'body #main', /* <article> is also "semantically rich", but there are several sites * that have a list of related articles, each in its own <article>. A * "real" article would not have any <article> siblings. */ ':not(li) > article:only-of-type', /* Common IDs and classes for the main content element (e.g. weblog * post IDs, newspaper articles, …) */ 'body #article', 'body :not(#spotlight) > .article', 'body .articleContent', 'body #article_top', 'body #article_body', 'body #article_main', 'body .post-body:not(.field-item)', ':not(input):not(textarea).post', ':not(input):not(textarea).blogpost', ':not(input):not(textarea).blogPost', 'body [id^="post0"]', 'body [id^="post1"]', 'body [id^="post2"]', 'body [id^="post3"]', 'body [id^="post4"]', 'body [id^="post5"]', 'body [id^="post6"]', 'body [id^="post7"]', 'body [id^="post8"]', 'body [id^="post9"]', 'body [id^="post-0"]', 'body [id^="post-1"]', 'body [id^="post-2"]', 'body [id^="post-3"]', 'body [id^="post-4"]', 'body [id^="post-5"]', 'body [id^="post-6"]', 'body [id^="post-7"]', 'body [id^="post-8"]', 'body [id^="post-9"]', 'body #entry', 'body .entry', 'body #content', 'body .content', 'body [id^="content"]', 'body [class^="content"]', 'body #main', 'body .main', /* Consider the first header (in DOM order) to be the most important * one and ass-u-me it is the start of the main content. */ 'h1:not(:empty)', 'body #header', 'header', 'body .header', 'h2:not(:empty)', /* When all else fails, just look for bigger text, which would * probably be used instead of the appropriate header elements. */ 'big' ]; /* Structure elements incorrectly used for layout purposes ("make it big and bold"). */ var structureElementsForLayoutSelectors = [ '//*[contains(" h1 h2 h3 h4 h5 h6 h7 ", concat(" ", local-name(), " ")) and string-length(normalize-space()) > 120]' ]; /* Layout elements incorrectly used for structure purposes ("bold means header"). */ var layoutElementsForStructureSelectors = [ /* Because there is no support for the Selectors Level 4 "subject of * a selector" syntax yet (or any definite syntax, for that matter), * I simply ass-u-me in the code below that the subject is a "B" * element. Either the result of the selector, or the previous * element sibling. */ 'b:first-child + :empty', ':empty + b + :empty', ':empty + b:last-child', 'div > b:only-child, p > b:only-child' ]; /* URI pattern for syntax highlighting style sheets. */ var syntaxHighlightHrefRegex = /\b((syntax|pygments)(hi(ghlight(er)?|lite(r)?))?|sh(Core|Theme[^.]*)|geshi|codecolorer)[./]/i; /* Keep track of which elements have had their event handlers * disabled/re-enabled. */ var elementsWithToggledEventHandlers = {}; var eventHandlerAttributesToToggle = [ 'oncontextmenu', 'onshow', 'oninput', 'onkeydown', 'onkeyup', 'onkeypress', 'onmousedown', 'onmouseup', 'onmouseenter', 'onmouseleave', 'onmouseover', 'onmouseout', 'onmousemove', 'onresize', 'onscroll', 'onwheel', 'onselect', 'onselectstart', 'onselectionchange' ]; /* All main content elements (the one in the main document and those * nested in any IFRAMEs etc.) */ var contentElements = []; /* The main function. */ (function execute(document) { function addClass(element, classNames) { /* HTMLElement.classList does not work on iOS 4's Safari, so this is a fallback. */ classNames.split(/\s+/).forEach(function (className) { element.className = ((' ' + element.className + ' ').replace(' ' + className.trim() + ' ', '') + ' ' + className).trim(); }); } function removeClass(element, classNames) { classNames.split(/\s+/).forEach(function (className) { element.className = (' ' + element.className + ' ').replace(' ' + className.trim() + ' ', '').trim(); }); } function toArray(arrayLike) { return Array.prototype.slice.call(arrayLike); } var all = toArray(document.getElementsByTagName('*')), ourStyleSheet = document.getElementById('jancss'), allStyleSheets = toArray(document.styleSheets), prettyPrintStyleSheet, matches; /* Special hack for The Guardian (and possibly others), which re-enables the CSS because it detects a change in font size. */ window.TextResizeDetector && TextResizeDetector.stopDetector && TextResizeDetector.stopDetector(); /* Clear all scheduled callbacks. Naively ass-u-me that any call to * setTimeout/setInterval returns the next ID from a monotonically * increasing function that is used for both timeout and interval * IDs. Therefore, to clear all timeouts and intervals, it suffices * to get a new timeout ID and then clear everything up to that ID. * * Though the HTML5 specification says nothing about the return value * of setTimeout/setInterval, this appears to work in Firefox 22, * Chrome 27, Opera 12 and Safari 5. */ var maxTimeoutId = setTimeout(function () { for (var i = 1; i < maxTimeoutId; i++) { clearTimeout(i); clearInterval(i); } }, 4); /* 4 ms is the minimum timeout as per HTML5. */ /* Now clear all the requested animation frame callbacks. Again, this * naively assumes the ID will increment one by one. MDN explicitly * advises against assumptions such as this one: https://developer.mozilla.org/en-US/docs/Web/API/window.requestAnimationFrame#Return_value */ var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame || function () { }; var cancelAnimationFrame = window.cancelAnimationFrame || window.mozCancelAnimationFrame || window.webkitCancelAnimationFrame || window.msCancelAnimationFrame || function () { }; var maxAnimationFrameRequestId = requestAnimationFrame(function () { for (i = 1; i < maxAnimationFrameRequestId * 2; i++) { cancelAnimationFrame(i); } /* Log requests to the original requestAnimationFrame. */ window.requestAnimationFrame = function (callback) { var callbackSource = callback.toSource && callback.toSource(); if (callbackSource && callbackSource.indexOf('Readable++ requestAnimationFrame interceptor') === -1) { console.log('Readable++: intercepted call to requestAnimationFrame at ' + new Date()); console.log('Readable++: callback for requestAnimationFrame: ' + callbackSource); } }; }); /* While in Readable++ mode, disable some elements' event handlers. * This prevents hijacking events like "scroll" and "resize", which * can be abused to annoy me with visual effects and whatnot, and * "contextmenu" and "selectstart", which are clearly defined as * universal and inalienable human rights. Look it up at your local * Wikipedia office. */ [window, document, document.documentElement, document.body].forEach(function (elem) { /* In non-HTML documents, elements like document.body can be * null. */ if (!elem) { return; } /* Because the window for IFRAMEs is the same as the outer * document's window, we need to keep track of wether we * have toggled the event handlers. Otherwise, they might * get disabled and re-enabled immediately after. */ if (elementsWithToggledEventHandlers[elem]) { return; } elementsWithToggledEventHandlers[elem] = true; /* Toggle selected event handlers that have been set using * "elem.oneventx = function () { … };" */ eventHandlerAttributesToToggle.forEach(function (attrib) { if (elem['jancss-' + attrib]) { elem[attrib] = elem['jancss-' + attrib]; delete elem['jancss-' + attrib]; } else if (elem[attrib]) { elem['jancss-' + attrib] = elem[attrib]; elem[attrib] = function () { }; } }); /* Toggle all event handlers that have been set using jQuery. */ if (typeof jQuery === 'function') { /* Since jQuery 1.7. */ if (typeof jQuery.hasData === 'function' && jQuery.hasData(elem)) { /* Spotted in the wild: "jQuery._data is undefined". */ if (typeof jQuery._data !== 'function') { return; } var data = jQuery._data(elem); if (data.jancssEvents) { data.events = data.jancssEvents; delete data.jancssEvents; jQuery._data(elem, data); return; } else if (data.events) { data.jancssEvents = data.events; delete data.events; jQuery._data(elem, data); return; } } /* Before jQuery 1.7 and after jQuery 1.2.3 */ if (jQuery.fn.data) { var $elem = jQuery(elem); var eventsData = $elem.data('events'); var jancssEventsData = $elem.data('jancssEvents'); if (jancssEventsData) { $elem.data('events', jancssEventsData); $elem.removeData('jancssEvents'); } else if (eventsData) { $elem.data('jancssEvents', eventsData); $elem.removeData('events'); } } } }); /* The code above does not work for event listeners added using * addEventListener. Some sites listen for the "resize" event and * then reposition elements by setting their style directly. To * counteract this, simply delete all "style" attributes that get set * while our style sheet is enabled. That'll show 'em! */ if (typeof MutationObserver === 'function' && !document.jancssHasMutationObserver) { document.jancssHasMutationObserver = true; var observer = new MutationObserver(function (mutations) { if (ourStyleSheet.disabled) { return; } mutations.forEach(function(mutation) { if (!mutation.target.hasAttribute('style') || mutation.target.id === 'xxxJanConsole' || mutation.target.xxxJanReadableAllowStyle) { return; } console.log('Readable++: removing "style" attribute set while in Readable++ mode on element ', mutation.target); mutation.target.removeAttribute(mutation.attributeName); }); }); observer.observe(document, { attributes: true, attributeFilter: ['style'], subtree: true }); } /* Load bLazy.js "retina" images. This is more specific than the * generic lazy-loading attributes below, and needs special handling * because it specifies multiple sources in one attribute. */ toArray(document.querySelectorAll('img.b-lazy[data-src*="|"]')).forEach(function (img) { var attribute = 'data-src'; var sources = img.getAttribute(attribute).split('|'); img.src = sources.pop(); img.removeAttribute(attribute); }); /* Load Riloadr "<noscript>" images. This is more specific than the * generic lazy-loading attributes below, and needs special handling * because it would reset the images to blank when scrolling after * Readable++ has been applied. */ toArray(document.querySelectorAll('img[data-src] + noscript')).forEach(function (noscript) { var img = noscript.previousElementSibling; var placeholder = img.previousElementSibling; if (placeholder && placeholder.tagName.toLowerCase() === 'svg') { placeholder.parentNode.removeChild(placeholder); } img.outerHTML = noscript.textContent; noscript.parentNode.removeChild(noscript); }); /* Load images that are supposed to be loaded lazily. */ [ 'data-original', 'data-lazyload', 'data-lazy-src', 'data-full-src', 'data-src' ].forEach(function (attribute) { toArray(document.querySelectorAll('img[' + attribute + ']')).forEach(function (img) { img.src = img.getAttribute(attribute); img.removeAttribute(attribute); }); }); /* Show controls on AUDIO and VIDEO elements. */ [].forEach.call(document.querySelectorAll('audio, video'), function (element) { element.controls = true; }); /* Hide empty list items that are not ":empty" as per CSS. So, * "empty" as in "containing text-less placeholders typically used * for social sharing by showing an icon or logo or whatnot" * (e.g. <li><a href="#"><span class="icon-fb"></span></a></li>). */ toArray(document.querySelectorAll('li :empty:not(img):not(input)')).forEach(function (elem) { while (elem.tagName && elem.tagName.toLowerCase() !== 'li') { elem = elem.parentNode; } if (elem.textContent.trim() === '' && !elem.querySelector('img, input')) { addClass(elem, 'jancss-emptyish'); } }); /* Remove known-bad elements. */ toArray(document.querySelectorAll(elementsToRemoveSelectors.join(', '))).forEach(function (element) { element.parentNode.removeChild(element); }); /* The first time this bookmarklet is called, add our style sheet and * check for layout elements. */ if (!ourStyleSheet) { (ourStyleSheet = document.createElementNS('http://www.w3.org/1999/xhtml', 'style')).id = 'jancss'; ourStyleSheet.innerHTML = css; (document.head || document.body || document.documentElement).appendChild(ourStyleSheet); ourStyleSheet.disabled = true; /* Highlight matching data table columns on :hover. I do not * know how to do this in pure CSS without COLGROUPs. */ function columnMouseHandler(e) { if (!/^t[dh]$/i.test('' + e.target.tagName)) { return; } var targetCell = e.target, nthChild = targetCell.cellIndex + 1, table = targetCell.parentNode; while (table && table.tagName.toLowerCase() !== 'table') { table = table.parentNode; } var activeColumnClassName = 'jancss-active-col'; toArray(table.querySelectorAll('td:nth-child(' + nthChild + ')')).forEach(function (cell) { if (e.type === 'mouseenter') { addClass(cell, activeColumnClassName); } else { removeClass(cell, activeColumnClassName); } }); } /* Check which tables are used for data instead of layout. */ toArray(document.querySelectorAll('table')).forEach(function (table) { var isTableForData = true; /* Are there any nested tables? */ if (table.querySelector('table')) { var isWikipediaInfobox = (' ' + table.className + ' ').match(/infobox/); if (!isWikipediaInfobox) { console.log('Readable++: TABLE contains other TABLEs, so probably for layout: ', table); isTableForData = false; } } /* Are we in quirks mode and does this table takes up most of the page height? */ else if (document.compatMode === 'BackCompat' && document.documentElement.scrollHeight > window.innerHeight && table.scrollHeight > 3/4 * document.documentElement.scrollHeight) { console.log('Readable++: TABLE seems pretty high in this document in quirks mode, so probably for layout: ', table); isTableForData = false; } /* If the table has several rows, look whether they are consistent in their number of cells. */ else if (table.rows.length > 3) { var numCellsPerRow = []; toArray(table.rows).forEach(function (row) { if (numCellsPerRow.indexOf(row.cells.length) === -1) { numCellsPerRow.push(row.cells.length); } }); /* Are we in quirks mode and does this table have at least three rows with a different number of cells? */ if (document.compatMode === 'BackCompat' && numCellsPerRow.length >= 3) { console.log('Readable++: TABLE has a lot of differing cell counts in this document in quirks mode, so probably for layout: ', table); isTableForData = false; } /* Does this table only have rows with just a single column? */ else if (numCellsPerRow.length === 1 && numCellsPerRow[0] === 1) { console.log('Readable++: TABLE has only rows of one cell each, so probably for layout: ', table); isTableForData = false; } } if (isTableForData) { addClass(table, 'jancss-probably-for-data'); table.addEventListener('mouseenter', columnMouseHandler, true); table.addEventListener('mouseleave', columnMouseHandler, true); } else { addClass(table, 'jancss-probably-for-layout'); } }); /* (Re-)add some syntax highlighters' CSS if necessary. Those styles are often defined in the main CSS, so the HREF test in toggleStyles() does not match. */ if (document.querySelector('.prettyprint')) { prettyPrintStyleSheet = document.createElementNS('http://www.w3.org/1999/xhtml', 'style'); prettyPrintStyleSheet.textContent = '@import url(https://janmoesen.github.io/bookmarklets/css/prettify.css)'; document.head.appendChild(prettyPrintStyleSheet); } else if (document.querySelector('.syntaxhighlighter')) { prettyPrintStyleSheet = document.createElementNS('http://www.w3.org/1999/xhtml', 'style'); prettyPrintStyleSheet.textContent = '@import url(https://janmoesen.github.io/bookmarklets/css/syntaxhighlighter.css)'; document.head.appendChild(prettyPrintStyleSheet); } else if (document.querySelector('.highlight .c, .highlight .k, .highlight .m, .highlight .s, .highlight .w')) { prettyPrintStyleSheet = document.createElementNS('http://www.w3.org/1999/xhtml', 'style'); prettyPrintStyleSheet.textContent = '@import url(https://janmoesen.github.io/bookmarklets/css/pygments.css)'; document.head.appendChild(prettyPrintStyleSheet); } else if (document.querySelector('code[class*="language-"] .token.punctuation')) { prettyPrintStyleSheet = document.createElementNS('http://www.w3.org/1999/xhtml', 'style'); prettyPrintStyleSheet.textContent = '@import url(https://janmoesen.github.io/bookmarklets/css/prism.css)'; document.head.appendChild(prettyPrintStyleSheet); } /* Add some classes to structure elements that have been used for layout. */ structureElementsForLayoutSelectors.forEach(function (selector) { var xPathResult = document.evaluate(selector, document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null); for (var i = 0; i < xPathResult.snapshotLength; i++) { var elem = xPathResult.snapshotItem(i); addClass(elem, 'jancss-probably-layout'); } }); /* Add some classes to layout elements that have been used for structure. */ layoutElementsForStructureSelectors.forEach(function (selector) { toArray(document.querySelectorAll(selector)).forEach(function (elem) { if (elem.tagName.toLowerCase() !== 'b') { elem = elem.previousElementSibling; } addClass(elem, 'jancss-probably-structure'); }); }); } /* Toggle between our readable and the page's original style sheet(s). */ function toggleStyles() { ourStyleSheet.disabled = !ourStyleSheet.disabled; if (prettyPrintStyleSheet) { prettyPrintStyleSheet.disabled = ourStyleSheet.disabled; } allStyleSheets.forEach(function (styleSheet, i) { if (styleSheet.ownerNode !== ourStyleSheet && !syntaxHighlightHrefRegex.test(styleSheet.href)) { /* Remember whether this style sheet was originally disabled or not. We can't store on the CSSStyleSheet object, so use our DOM node. */ if (ourStyleSheet['jancss-originally-disabled-' + i] === undefined) { ourStyleSheet['jancss-originally-disabled-' + i] = styleSheet.disabled; } if (ourStyleSheet.disabled) { /* Restore this style sheet's original state. */ styleSheet.disabled = ourStyleSheet['jancss-originally-disabled-' + i]; } else { /* Disable this style sheet when ours is enabled. */ styleSheet.disabled = true; try { /* … unless it is a pretty-print style sheet. */ if (styleSheet.cssRules[0] && styleSheet.cssRules[0].type === styleSheet.cssRules[0].IMPORT_RULE && styleSheet.cssRules[0].href) { styleSheet.disabled = !styleSheet.cssRules[0].href.match(/^https:\/\/janmoesen\.github\.io\//); } } catch (e) { } } } }); /* Process all attributes for all elements. */ all.forEach(function (elem, i) { attrs.forEach(function (attr, j) { /* Parse the attribute definition. Attributes can be restricted to certain elements, e.g. "table@width". */ if (!(matches = attr.match(/([^@]+)@([^@]+)/)) || (elem.tagName && elem.tagName.toLowerCase() == matches[1])) { attr = matches ? matches[2] : attr; var names = { enabled: attr, disabled: 'jancss-' + attr }; if (elem.hasAttribute(names.enabled)) { elem.setAttribute(names.disabled, elem.getAttribute(names.enabled)); elem.removeAttribute(names.enabled); } else if (elem.hasAttribute(names.disabled)) { elem.setAttribute(names.enabled, elem.getAttribute(names.disabled)); elem.removeAttribute(names.disabled); } } }); }); /* Restore the inline styles for certain code highlighters. */ var disabledStyleAttr = 'jancss-style'; toArray(document.querySelectorAll('.wp_syntax [' + disabledStyleAttr + ']')).forEach(function (elem) { elem.setAttribute('style', elem.getAttribute(disabledStyleAttr)); elem.removeAttribute(disabledStyleAttr); }); } /* Find the first thing that looks like the start of the actual content so we can scroll to it after applying our CSS. */ function findContentElement() { /* When there seems to be a link to an in-page anchor (e.g. foo.html#mainContent), try to get the linked element. */ if (location.hash) { var inPageAnchor, inPageAnchorSelectors = [ 'a[name="' + location.hash.substring(1) + '"]', location.hash.replace(/\./g, '\\.') ]; for (var i = 0; i < inPageAnchorSelectors.length; i++) { try { if ((inPageAnchor = document.querySelector(inPageAnchorSelectors[i]))) { console.log('Readable++: found in-page anchor based on location.hash: ', inPageAnchor); return inPageAnchor; } } catch (e) { } } } /* Check for headers whose text appears in the page title. */ var headerInPageTitle; var charactersToIgnore = /[^A-Za-z\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B4\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D5F-\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16F1-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FD5\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA7AD\uA7B0-\uA7B7\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA8FD\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB65\uAB70-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]+/g; function normalizeText(str) { return str .replace(/\xAD/g, '') .replace(charactersToIgnore, ' ') .trim(); } var metaTitleElement = document.querySelector('meta[property="og:title"], meta[property="twitter:title"], meta[name="title"]'); var normalizedMetaTitle = metaTitleElement && normalizeText(metaTitleElement.content); var normalizedPageTitle = normalizeText(document.title); headerSelectors.forEach(function (selector) { toArray(document.querySelectorAll(selector)).forEach(function (element) { var normalizedText = normalizeText(element.textContent); /* Make sure the element has text. */ if (!normalizedText.length) { return; } /* Make sure the element is visible. */ var boundingRect = element.getBoundingClientRect(); if (!boundingRect.width || !boundingRect.height) { return; } /* Make sure the element is "above the fold" (or near it). Some sites use * bigger headings for a footer section than for the actual content, but in * general, the real header should be visible within the first screenful. */ if (boundingRect.top + window.scrollY > window.innerHeight * 1.5) { return; } /* Make sure the title can contain the element's text. */ if ( normalizedPageTitle.length < normalizedText.length && (!metaTitleElement || normalizedMetaTitle.length < normalizedText.length) ) { return; } /* See if the element's text appears in the page title. */ var substringIndex = normalizedPageTitle.indexOf(normalizedText); if (substringIndex === -1 && metaTitleElement) { substringIndex = normalizedMetaTitle.indexOf(normalizedText); } if (substringIndex === -1) { return; } /* Make sure the element is not contained in an ASIDE or a sidebar (e.g. in a list of articles). */ if (typeof element.closest === 'function' && element.closest(ancestorsForHeadersToIgnoreSelectors.join(', '))) { return; } headerInPageTitle = element; }); }); if (headerInPageTitle) { console.log('Readable++: found suitable header element whose text appears in the page title: ', headerInPageTitle); return headerInPageTitle; } /* Fall back to common content element selectors. */ for (var i = 0; i < contentSelectors.length; i++) { try { var element = document.querySelector(contentSelectors[i]); /* Make sure the element was either an anchor or something "visible". */ if (element && (element.tagName.toLowerCase() === 'a' || element.offsetWidth || element.offsetHeight)) { console.log('Readable++: found matching selector for content element: ' + contentSelectors[i] + '\nElement: ', element); return element; } } catch (e) { console.log('Readable++: bad selector for content element: ' + contentSelectors[i] + '\nException: ' + e); } } } /* Check if there is an element that we should scroll into view so we can immediately start reading. */ var contentElement, shouldScrollContentIntoView = false; var selection = document.getSelection && document.getSelection(); if (selection && selection.anchorNode && (selection + '').length) { /* If the user has created a selection, scroll the element containing that selection into view. (I often triple-click a paragraph to select it before reading.) */ shouldScrollContentIntoView = true; contentElement = selection.anchorNode; while (contentElement.nodeType !== contentElement.ELEMENT_NODE && contentElement.parentNode) { contentElement = contentElement.parentNode; } console.log('Readable++: found selected element to scroll into view: ', contentElement); } else if (ourStyleSheet.disabled && (contentElement = findContentElement())) { /* When switching from the original style sheet to ours, scroll to the start of the content, unless the user had scrolled already. */ var tmpElement = contentElement, contentTop = 0; do { contentTop += tmpElement.offsetTop; } while ((tmpElement = tmpElement.offsetParent)); shouldScrollContentIntoView = !window.scrollY || Math.abs(window.scrollY - contentTop) < 20; } /* Finally, toggle the style sheets. */ toggleStyles(); /* Scroll to the start of the content if we found it and have not scrolled yet. */ shouldScrollContentIntoView && contentElements.push(contentElement); /* Recurse for frames and iframes. */ try { toArray(document.querySelectorAll('frame, iframe, object[type^="text/html"], object[type^="application/xhtml+xml"]')).forEach(function (elem) { execute(elem.contentDocument); }); } catch (e) { /* Catch exceptions for out-of-domain access, but do not do anything with them. */ } })(document); /* When there are IFRAMEs etc. with their own main content element, * scrolling them into view as soon as they are found would override the * main document’s scroll position. By scrolling the nested elements into * view *first*, and the main document’s main content element *last*, * things behave more as expected. */ var contentElement; while ((contentElement = contentElements.pop())) { contentElement.scrollIntoView({ behavior: 'smooth', block: 'start', inline: 'start' }); }; })();