Update Readability from upstream.
Fedor
parent
14c4ffa708
commit
4562043d2f
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@ -315,6 +315,7 @@
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}
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}
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getElems(this);
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elems._isLiveNodeList = true;
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return elems;
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}
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@ -503,17 +504,9 @@
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},
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setValue: function(newValue) {
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this._value = newValue;
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delete this._decodedValue;
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},
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setDecodedValue: function(newValue) {
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this._value = encodeHTML(newValue);
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this._decodedValue = newValue;
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},
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getDecodedValue: function() {
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if (typeof this._decodedValue === "undefined") {
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this._decodedValue = (this._value && decodeHTML(this._value)) || "";
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}
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return this._decodedValue;
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getEncodedValue: function() {
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return encodeHTML(this._value);
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},
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};
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@ -673,6 +666,14 @@
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this.setAttribute("src", str);
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},
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get srcset() {
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return this.getAttribute("srcset") || "";
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},
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set srcset(str) {
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this.setAttribute("srcset", str);
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},
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get nodeName() {
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return this.tagName;
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},
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@ -689,7 +690,7 @@
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for (var j = 0; j < child.attributes.length; j++) {
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var attr = child.attributes[j];
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// the attribute value will be HTML escaped.
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var val = attr.value;
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var val = attr.getEncodedValue();
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var quote = (val.indexOf('"') === -1 ? '"' : "'");
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arr.push(" " + attr.name + "=" + quote + val + quote);
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}
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@ -767,8 +768,9 @@
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getAttribute: function (name) {
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for (var i = this.attributes.length; --i >= 0;) {
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var attr = this.attributes[i];
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if (attr.name === name)
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return attr.getDecodedValue();
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if (attr.name === name) {
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return attr.value;
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}
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}
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return undefined;
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},
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@ -777,11 +779,11 @@
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for (var i = this.attributes.length; --i >= 0;) {
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var attr = this.attributes[i];
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if (attr.name === name) {
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attr.setDecodedValue(value);
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attr.setValue(value);
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return;
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}
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}
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this.attributes.push(new Attribute(name, encodeHTML(value)));
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this.attributes.push(new Attribute(name, value));
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},
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removeAttribute: function (name) {
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@ -945,7 +947,7 @@
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// Read the attribute value (and consume the matching quote)
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var value = this.readString(c);
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node.attributes.push(new Attribute(name, value));
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node.attributes.push(new Attribute(name, decodeHTML(value)));
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return;
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},
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@ -31,13 +31,16 @@
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var REGEXPS = {
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// NOTE: These two regular expressions are duplicated in
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// Readability.js. Please keep both copies in sync.
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unlikelyCandidates: /-ad-|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|foot|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i,
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okMaybeItsACandidate: /and|article|body|column|main|shadow/i,
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unlikelyCandidates: /-ad-|ai2html|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i,
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okMaybeItsACandidate: /and|article|body|column|content|main|shadow/i,
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};
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function isNodeVisible(node) {
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// Have to null-check node.style to deal with SVG and MathML nodes.
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return (!node.style || node.style.display != "none") && !node.hasAttribute("hidden");
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// Have to null-check node.style and node.className.indexOf to deal with SVG and MathML nodes.
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return (!node.style || node.style.display != "none")
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&& !node.hasAttribute("hidden")
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//check for "fallback-image" so that wikimedia math images are displayed
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&& (!node.hasAttribute("aria-hidden") || node.getAttribute("aria-hidden") != "true" || (node.className && node.className.indexOf && node.className.indexOf("fallback-image") !== -1));
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}
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/**
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@ -43,6 +43,7 @@ function Readability(doc, options) {
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options = options || {};
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this._doc = doc;
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this._docJSDOMParser = this._doc.firstChild.__JSDOMParser__;
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this._articleTitle = null;
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this._articleByline = null;
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this._articleDir = null;
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@ -55,6 +56,7 @@ function Readability(doc, options) {
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this._nbTopCandidates = options.nbTopCandidates || this.DEFAULT_N_TOP_CANDIDATES;
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this._charThreshold = options.charThreshold || this.DEFAULT_CHAR_THRESHOLD;
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this._classesToPreserve = this.CLASSES_TO_PRESERVE.concat(options.classesToPreserve || []);
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this._keepClasses = !!options.keepClasses;
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// Start with all flags set
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this._flags = this.FLAG_STRIP_UNLIKELYS |
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@ -121,20 +123,23 @@ Readability.prototype = {
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REGEXPS: {
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// NOTE: These two regular expressions are duplicated in
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// Readability-readerable.js. Please keep both copies in sync.
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unlikelyCandidates: /-ad-|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|foot|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i,
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okMaybeItsACandidate: /and|article|body|column|main|shadow/i,
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unlikelyCandidates: /-ad-|ai2html|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i,
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okMaybeItsACandidate: /and|article|body|column|content|main|shadow/i,
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positive: /article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story/i,
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negative: /hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|foot|footer|footnote|masthead|media|meta|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget/i,
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negative: /hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|foot|footer|footnote|gdpr|masthead|media|meta|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget/i,
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extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
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byline: /byline|author|dateline|writtenby|p-author/i,
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replaceFonts: /<(\/?)font[^>]*>/gi,
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normalize: /\s{2,}/g,
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videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i,
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shareElements: /(\b|_)(share|sharedaddy)(\b|_)/i,
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nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
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prevLink: /(prev|earl|old|new|<|«)/i,
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whitespace: /^\s*$/,
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hasContent: /\S$/,
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srcsetUrl: /(\S+)(\s+[\d.]+[xw])?(\s*(?:,|$))/g,
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b64DataUrl: /^data:\s*([^\s;,]+)\s*;\s*base64\s*,/i
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},
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DIV_TO_P_ELEMS: [ "A", "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL", "SELECT" ],
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@ -159,6 +164,15 @@ Readability.prototype = {
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// These are the classes that readability sets itself.
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CLASSES_TO_PRESERVE: [ "page" ],
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// These are the list of HTML entities that need to be escaped.
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HTML_ESCAPE_MAP: {
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"lt": "<",
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"gt": ">",
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"amp": "&",
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"quot": '"',
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"apos": "'",
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},
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/**
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* Run any post-process modifications to article content as necessary.
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*
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@ -169,8 +183,10 @@ Readability.prototype = {
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// Readability cannot open relative uris so we convert them to absolute uris.
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this._fixRelativeUris(articleContent);
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// Remove classes.
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this._cleanClasses(articleContent);
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if (!this._keepClasses) {
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// Remove classes.
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this._cleanClasses(articleContent);
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}
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},
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/**
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@ -184,6 +200,10 @@ Readability.prototype = {
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* @return void
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*/
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_removeNodes: function(nodeList, filterFn) {
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// Avoid ever operating on live node lists.
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if (this._docJSDOMParser && nodeList._isLiveNodeList) {
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throw new Error("Do not pass live node lists to _removeNodes");
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}
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for (var i = nodeList.length - 1; i >= 0; i--) {
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var node = nodeList[i];
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var parentNode = node.parentNode;
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@ -203,6 +223,10 @@ Readability.prototype = {
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* @return void
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*/
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_replaceNodeTags: function(nodeList, newTagName) {
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// Avoid ever operating on live node lists.
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if (this._docJSDOMParser && nodeList._isLiveNodeList) {
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throw new Error("Do not pass live node lists to _replaceNodeTags");
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}
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for (var i = nodeList.length - 1; i >= 0; i--) {
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var node = nodeList[i];
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this._setNodeTag(node, newTagName);
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@ -322,6 +346,7 @@ Readability.prototype = {
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if (baseURI == documentURI && uri.charAt(0) == "#") {
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return uri;
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}
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// Otherwise, resolve against base URI:
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try {
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return new URL(uri, baseURI).href;
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@ -335,22 +360,50 @@ Readability.prototype = {
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this._forEachNode(links, function(link) {
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var href = link.getAttribute("href");
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if (href) {
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// Replace links with javascript: URIs with text content, since
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// Remove links with javascript: URIs, since
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// they won't work after scripts have been removed from the page.
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if (href.indexOf("javascript:") === 0) {
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var text = this._doc.createTextNode(link.textContent);
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link.parentNode.replaceChild(text, link);
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// if the link only contains simple text content, it can be converted to a text node
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if (link.childNodes.length === 1 && link.childNodes[0].nodeType === this.TEXT_NODE) {
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var text = this._doc.createTextNode(link.textContent);
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link.parentNode.replaceChild(text, link);
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} else {
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// if the link has multiple children, they should all be preserved
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var container = this._doc.createElement("span");
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while (link.childNodes.length > 0) {
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container.appendChild(link.childNodes[0]);
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}
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link.parentNode.replaceChild(container, link);
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}
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} else {
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link.setAttribute("href", toAbsoluteURI(href));
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}
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}
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});
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var imgs = this._getAllNodesWithTag(articleContent, ["img"]);
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this._forEachNode(imgs, function(img) {
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var src = img.getAttribute("src");
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var medias = this._getAllNodesWithTag(articleContent, [
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"img", "picture", "figure", "video", "audio", "source"
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]);
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this._forEachNode(medias, function(media) {
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var src = media.getAttribute("src");
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var poster = media.getAttribute("poster");
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var srcset = media.getAttribute("srcset");
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if (src) {
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img.setAttribute("src", toAbsoluteURI(src));
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media.setAttribute("src", toAbsoluteURI(src));
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}
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if (poster) {
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media.setAttribute("poster", toAbsoluteURI(poster));
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}
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if (srcset) {
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var newSrcset = srcset.replace(this.REGEXPS.srcsetUrl, function(_, p1, p2, p3) {
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return toAbsoluteURI(p1) + (p2 || "") + p3;
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});
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media.setAttribute("srcset", newSrcset);
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}
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});
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},
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@ -444,13 +497,13 @@ Readability.prototype = {
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var doc = this._doc;
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// Remove all style tags in head
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this._removeNodes(doc.getElementsByTagName("style"));
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this._removeNodes(this._getAllNodesWithTag(doc, ["style"]));
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if (doc.body) {
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this._replaceBrs(doc.body);
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}
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this._replaceNodeTags(doc.getElementsByTagName("font"), "SPAN");
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this._replaceNodeTags(this._getAllNodesWithTag(doc, ["font"]), "SPAN");
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},
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/**
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@ -530,7 +583,7 @@ Readability.prototype = {
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_setNodeTag: function (node, tag) {
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this.log("_setNodeTag", node, tag);
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if (node.__JSDOMParser__) {
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if (this._docJSDOMParser) {
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node.localName = tag.toLowerCase();
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node.tagName = tag.toUpperCase();
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return node;
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@ -545,7 +598,16 @@ Readability.prototype = {
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replacement.readability = node.readability;
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for (var i = 0; i < node.attributes.length; i++) {
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replacement.setAttribute(node.attributes[i].name, node.attributes[i].value);
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try {
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replacement.setAttribute(node.attributes[i].name, node.attributes[i].value);
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} catch (ex) {
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/* it's possible for setAttribute() to throw if the attribute name
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* isn't a valid XML Name. Such attributes can however be parsed from
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* source in HTML docs, see https://github.com/whatwg/html/issues/4275,
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* so we can hit them here and then throw. We don't care about such
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* attributes so we ignore them.
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*/
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}
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}
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return replacement;
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},
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@ -565,6 +627,8 @@ Readability.prototype = {
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// visually linked to other content-ful elements (text, images, etc.).
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this._markDataTables(articleContent);
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this._fixLazyImages(articleContent);
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// Clean out junk from the article content
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this._cleanConditionally(articleContent, "form");
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this._cleanConditionally(articleContent, "fieldset");
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@ -575,10 +639,15 @@ Readability.prototype = {
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this._clean(articleContent, "link");
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this._clean(articleContent, "aside");
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// Clean out elements have "share" in their id/class combinations from final top candidates,
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// Clean out elements with little content that have "share" in their id/class combinations from final top candidates,
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// which means we don't remove the top candidates even they have "share".
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this._forEachNode(articleContent.children, function(topCandidate) {
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this._cleanMatchedNodes(topCandidate, /share/);
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var shareElementThreshold = this.DEFAULT_CHAR_THRESHOLD;
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this._forEachNode(articleContent.children, function (topCandidate) {
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this._cleanMatchedNodes(topCandidate, function (node, matchString) {
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return this.REGEXPS.shareElements.test(matchString) && node.textContent.length < shareElementThreshold;
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});
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});
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// If there is only one h2 and its text content substantially equals article title,
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@ -614,7 +683,7 @@ Readability.prototype = {
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this._cleanConditionally(articleContent, "div");
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// Remove extra paragraphs
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this._removeNodes(articleContent.getElementsByTagName("p"), function (paragraph) {
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this._removeNodes(this._getAllNodesWithTag(articleContent, ["p"]), function (paragraph) {
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var imgCount = paragraph.getElementsByTagName("img").length;
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var embedCount = paragraph.getElementsByTagName("embed").length;
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var objectCount = paragraph.getElementsByTagName("object").length;
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@ -729,9 +798,10 @@ Readability.prototype = {
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if (node.getAttribute !== undefined) {
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var rel = node.getAttribute("rel");
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var itemprop = node.getAttribute("itemprop");
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}
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if ((rel === "author" || this.REGEXPS.byline.test(matchString)) && this._isValidByline(node.textContent)) {
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if ((rel === "author" || (itemprop && itemprop.indexOf("author") !== -1) || this.REGEXPS.byline.test(matchString)) && this._isValidByline(node.textContent)) {
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this._articleByline = node.textContent.trim();
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return true;
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}
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@ -800,12 +870,19 @@ Readability.prototype = {
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if (stripUnlikelyCandidates) {
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if (this.REGEXPS.unlikelyCandidates.test(matchString) &&
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!this.REGEXPS.okMaybeItsACandidate.test(matchString) &&
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!this._hasAncestorTag(node, "table") &&
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node.tagName !== "BODY" &&
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node.tagName !== "A") {
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this.log("Removing unlikely candidate - " + matchString);
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node = this._removeAndGetNext(node);
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continue;
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}
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if (node.getAttribute("role") == "complementary") {
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this.log("Removing complementary content - " + matchString);
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node = this._removeAndGetNext(node);
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continue;
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}
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}
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// Remove DIV, SECTION, and HEADER nodes without any content(e.g. text, image, video, or iframe).
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@ -1199,6 +1276,26 @@ Readability.prototype = {
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return false;
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},
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/**
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* Converts some of the common HTML entities in string to their corresponding characters.
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*
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* @param str {string} - a string to unescape.
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* @return string without HTML entity.
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*/
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_unescapeHtmlEntities: function(str) {
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if (!str) {
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return str;
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}
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var htmlEscapeMap = this.HTML_ESCAPE_MAP;
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return str.replace(/&(quot|amp|apos|lt|gt);/g, function(_, tag) {
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return htmlEscapeMap[tag];
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}).replace(/&#(?:x([0-9a-z]{1,4})|([0-9]{1,4}));/gi, function(_, hex, numStr) {
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var num = parseInt(hex || numStr, hex ? 16 : 10);
|
||||
return String.fromCharCode(num);
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Attempts to get excerpt and byline metadata for the article.
|
||||
*
|
||||
|
|
@ -1220,6 +1317,9 @@ Readability.prototype = {
|
|||
var elementName = element.getAttribute("name");
|
||||
var elementProperty = element.getAttribute("property");
|
||||
var content = element.getAttribute("content");
|
||||
if (!content) {
|
||||
return;
|
||||
}
|
||||
var matches = null;
|
||||
var name = null;
|
||||
|
||||
|
|
@ -1276,21 +1376,123 @@ Readability.prototype = {
|
|||
// get site name
|
||||
metadata.siteName = values["og:site_name"];
|
||||
|
||||
// in many sites the meta value is escaped with HTML entities,
|
||||
// so here we need to unescape it
|
||||
metadata.title = this._unescapeHtmlEntities(metadata.title);
|
||||
metadata.byline = this._unescapeHtmlEntities(metadata.byline);
|
||||
metadata.excerpt = this._unescapeHtmlEntities(metadata.excerpt);
|
||||
metadata.siteName = this._unescapeHtmlEntities(metadata.siteName);
|
||||
|
||||
return metadata;
|
||||
},
|
||||
|
||||
/**
|
||||
* Check if node is image, or if node contains exactly only one image
|
||||
* whether as a direct child or as its descendants.
|
||||
*
|
||||
* @param Element
|
||||
**/
|
||||
_isSingleImage: function(node) {
|
||||
if (node.tagName === "IMG") {
|
||||
return true;
|
||||
}
|
||||
|
||||
if (node.children.length !== 1 || node.textContent.trim() !== "") {
|
||||
return false;
|
||||
}
|
||||
|
||||
return this._isSingleImage(node.children[0]);
|
||||
},
|
||||
|
||||
/**
|
||||
* Find all <noscript> that are located after <img> nodes, and which contain only one
|
||||
* <img> element. Replace the first image with the image from inside the <noscript> tag,
|
||||
* and remove the <noscript> tag. This improves the quality of the images we use on
|
||||
* some sites (e.g. Medium).
|
||||
*
|
||||
* @param Element
|
||||
**/
|
||||
_unwrapNoscriptImages: function(doc) {
|
||||
// Find img without source or attributes that might contains image, and remove it.
|
||||
// This is done to prevent a placeholder img is replaced by img from noscript in next step.
|
||||
var imgs = Array.from(doc.getElementsByTagName("img"));
|
||||
this._forEachNode(imgs, function(img) {
|
||||
for (var i = 0; i < img.attributes.length; i++) {
|
||||
var attr = img.attributes[i];
|
||||
switch (attr.name) {
|
||||
case "src":
|
||||
case "srcset":
|
||||
case "data-src":
|
||||
case "data-srcset":
|
||||
return;
|
||||
}
|
||||
|
||||
if (/\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
img.parentNode.removeChild(img);
|
||||
});
|
||||
|
||||
// Next find noscript and try to extract its image
|
||||
var noscripts = Array.from(doc.getElementsByTagName("noscript"));
|
||||
this._forEachNode(noscripts, function(noscript) {
|
||||
// Parse content of noscript and make sure it only contains image
|
||||
var tmp = doc.createElement("div");
|
||||
tmp.innerHTML = noscript.innerHTML;
|
||||
if (!this._isSingleImage(tmp)) {
|
||||
return;
|
||||
}
|
||||
|
||||
// If noscript has previous sibling and it only contains image,
|
||||
// replace it with noscript content. However we also keep old
|
||||
// attributes that might contains image.
|
||||
var prevElement = noscript.previousElementSibling;
|
||||
if (prevElement && this._isSingleImage(prevElement)) {
|
||||
var prevImg = prevElement;
|
||||
if (prevImg.tagName !== "IMG") {
|
||||
prevImg = prevElement.getElementsByTagName("img")[0];
|
||||
}
|
||||
|
||||
var newImg = tmp.getElementsByTagName("img")[0];
|
||||
for (var i = 0; i < prevImg.attributes.length; i++) {
|
||||
var attr = prevImg.attributes[i];
|
||||
if (attr.value === "") {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (attr.name === "src" || attr.name === "srcset" || /\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
|
||||
if (newImg.getAttribute(attr.name) === attr.value) {
|
||||
continue;
|
||||
}
|
||||
|
||||
var attrName = attr.name;
|
||||
if (newImg.hasAttribute(attrName)) {
|
||||
attrName = "data-old-" + attrName;
|
||||
}
|
||||
|
||||
newImg.setAttribute(attrName, attr.value);
|
||||
}
|
||||
}
|
||||
|
||||
noscript.parentNode.replaceChild(tmp.firstElementChild, prevElement);
|
||||
}
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Removes script tags from the document.
|
||||
*
|
||||
* @param Element
|
||||
**/
|
||||
_removeScripts: function(doc) {
|
||||
this._removeNodes(doc.getElementsByTagName("script"), function(scriptNode) {
|
||||
this._removeNodes(this._getAllNodesWithTag(doc, ["script"]), function(scriptNode) {
|
||||
scriptNode.nodeValue = "";
|
||||
scriptNode.removeAttribute("src");
|
||||
return true;
|
||||
});
|
||||
this._removeNodes(doc.getElementsByTagName("noscript"));
|
||||
this._removeNodes(this._getAllNodesWithTag(doc, ["noscript"]));
|
||||
},
|
||||
|
||||
/**
|
||||
|
|
@ -1473,20 +1675,20 @@ Readability.prototype = {
|
|||
_clean: function(e, tag) {
|
||||
var isEmbed = ["object", "embed", "iframe"].indexOf(tag) !== -1;
|
||||
|
||||
this._removeNodes(e.getElementsByTagName(tag), function(element) {
|
||||
this._removeNodes(this._getAllNodesWithTag(e, [tag]), function(element) {
|
||||
// Allow youtube and vimeo videos through as people usually want to see those.
|
||||
if (isEmbed) {
|
||||
var attributeValues = [].map.call(element.attributes, function(attr) {
|
||||
return attr.value;
|
||||
}).join("|");
|
||||
|
||||
// First, check the elements attributes to see if any of them contain youtube or vimeo
|
||||
if (this.REGEXPS.videos.test(attributeValues))
|
||||
return false;
|
||||
for (var i = 0; i < element.attributes.length; i++) {
|
||||
if (this.REGEXPS.videos.test(element.attributes[i].value)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
// Then check the elements inside this element for the same.
|
||||
if (this.REGEXPS.videos.test(element.innerHTML))
|
||||
// For embed with <object> tag, check inner HTML as well.
|
||||
if (element.tagName === "object" && this.REGEXPS.videos.test(element.innerHTML)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
|
|
@ -1604,6 +1806,76 @@ Readability.prototype = {
|
|||
}
|
||||
},
|
||||
|
||||
/* convert images and figures that have properties like data-src into images that can be loaded without JS */
|
||||
_fixLazyImages: function (root) {
|
||||
this._forEachNode(this._getAllNodesWithTag(root, ["img", "picture", "figure"]), function (elem) {
|
||||
// In some sites (e.g. Kotaku), they put 1px square image as base64 data uri in the src attribute.
|
||||
// So, here we check if the data uri is too short, just might as well remove it.
|
||||
if (elem.src && this.REGEXPS.b64DataUrl.test(elem.src)) {
|
||||
// Make sure it's not SVG, because SVG can have a meaningful image in under 133 bytes.
|
||||
var parts = this.REGEXPS.b64DataUrl.exec(elem.src);
|
||||
if (parts[1] === "image/svg+xml") {
|
||||
return;
|
||||
}
|
||||
|
||||
// Make sure this element has other attributes which contains image.
|
||||
// If it doesn't, then this src is important and shouldn't be removed.
|
||||
var srcCouldBeRemoved = false;
|
||||
for (var i = 0; i < elem.attributes.length; i++) {
|
||||
var attr = elem.attributes[i];
|
||||
if (attr.name === "src") {
|
||||
continue;
|
||||
}
|
||||
|
||||
if (/\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
|
||||
srcCouldBeRemoved = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Here we assume if image is less than 100 bytes (or 133B after encoded to base64)
|
||||
// it will be too small, therefore it might be placeholder image.
|
||||
if (srcCouldBeRemoved) {
|
||||
var b64starts = elem.src.search(/base64\s*/i) + 7;
|
||||
var b64length = elem.src.length - b64starts;
|
||||
if (b64length < 133) {
|
||||
elem.removeAttribute("src");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// also check for "null" to work around https://github.com/jsdom/jsdom/issues/2580
|
||||
if ((elem.src || (elem.srcset && elem.srcset != "null")) && elem.className.toLowerCase().indexOf("lazy") === -1) {
|
||||
return;
|
||||
}
|
||||
|
||||
for (var j = 0; j < elem.attributes.length; j++) {
|
||||
attr = elem.attributes[j];
|
||||
if (attr.name === "src" || attr.name === "srcset") {
|
||||
continue;
|
||||
}
|
||||
var copyTo = null;
|
||||
if (/\.(jpg|jpeg|png|webp)\s+\d/.test(attr.value)) {
|
||||
copyTo = "srcset";
|
||||
} else if (/^\s*\S+\.(jpg|jpeg|png|webp)\S*\s*$/.test(attr.value)) {
|
||||
copyTo = "src";
|
||||
}
|
||||
if (copyTo) {
|
||||
//if this is an img or picture, set the attribute directly
|
||||
if (elem.tagName === "IMG" || elem.tagName === "PICTURE") {
|
||||
elem.setAttribute(copyTo, attr.value);
|
||||
} else if (elem.tagName === "FIGURE" && !this._getAllNodesWithTag(elem, ["img", "picture"]).length) {
|
||||
//if the item is a <figure> that does not contain an image or picture, create one and place it inside the figure
|
||||
//see the nytimes-3 testcase for an example
|
||||
var img = this._doc.createElement("img");
|
||||
img.setAttribute(copyTo, attr.value);
|
||||
elem.appendChild(img);
|
||||
}
|
||||
}
|
||||
}
|
||||
});
|
||||
},
|
||||
|
||||
/**
|
||||
* Clean an element of all tags of type "tag" if they look fishy.
|
||||
* "Fishy" is an algorithm based on content length, classnames, link density, number of images & embeds, etc.
|
||||
|
|
@ -1621,12 +1893,17 @@ Readability.prototype = {
|
|||
// without effecting the traversal.
|
||||
//
|
||||
// TODO: Consider taking into account original contentScore here.
|
||||
this._removeNodes(e.getElementsByTagName(tag), function(node) {
|
||||
// First check if we're in a data table, in which case don't remove us.
|
||||
this._removeNodes(this._getAllNodesWithTag(e, [tag]), function(node) {
|
||||
// First check if this node IS data table, in which case don't remove it.
|
||||
var isDataTable = function(t) {
|
||||
return t._readabilityDataTable;
|
||||
};
|
||||
|
||||
if (tag === "table" && isDataTable(node)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Next check if we're inside a data table, in which case don't remove it as well.
|
||||
if (this._hasAncestorTag(node, "table", -1, isDataTable)) {
|
||||
return false;
|
||||
}
|
||||
|
|
@ -1650,10 +1927,22 @@ Readability.prototype = {
|
|||
var input = node.getElementsByTagName("input").length;
|
||||
|
||||
var embedCount = 0;
|
||||
var embeds = node.getElementsByTagName("embed");
|
||||
for (var ei = 0, il = embeds.length; ei < il; ei += 1) {
|
||||
if (!this.REGEXPS.videos.test(embeds[ei].src))
|
||||
embedCount += 1;
|
||||
var embeds = this._getAllNodesWithTag(node, ["object", "embed", "iframe"]);
|
||||
|
||||
for (var i = 0; i < embeds.length; i++) {
|
||||
// If this embed has attribute that matches video regex, don't delete it.
|
||||
for (var j = 0; j < embeds[i].attributes.length; j++) {
|
||||
if (this.REGEXPS.videos.test(embeds[i].attributes[j].value)) {
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
// For embed with <object> tag, check inner HTML as well.
|
||||
if (embeds[i].tagName === "object" && this.REGEXPS.videos.test(embeds[i].innerHTML)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
embedCount++;
|
||||
}
|
||||
|
||||
var linkDensity = this._getLinkDensity(node);
|
||||
|
|
@ -1674,17 +1963,17 @@ Readability.prototype = {
|
|||
},
|
||||
|
||||
/**
|
||||
* Clean out elements whose id/class combinations match specific string.
|
||||
* Clean out elements that match the specified conditions
|
||||
*
|
||||
* @param Element
|
||||
* @param RegExp match id/class combination.
|
||||
* @param Function determines whether a node should be removed
|
||||
* @return void
|
||||
**/
|
||||
_cleanMatchedNodes: function(e, regex) {
|
||||
_cleanMatchedNodes: function(e, filter) {
|
||||
var endOfSearchMarkerNode = this._getNextNode(e, true);
|
||||
var next = this._getNextNode(e);
|
||||
while (next && next != endOfSearchMarkerNode) {
|
||||
if (regex.test(next.className + " " + next.id)) {
|
||||
if (filter.call(this, next, next.className + " " + next.id)) {
|
||||
next = this._removeAndGetNext(next);
|
||||
} else {
|
||||
next = this._getNextNode(next);
|
||||
|
|
@ -1699,11 +1988,9 @@ Readability.prototype = {
|
|||
* @return void
|
||||
**/
|
||||
_cleanHeaders: function(e) {
|
||||
for (var headerIndex = 1; headerIndex < 3; headerIndex += 1) {
|
||||
this._removeNodes(e.getElementsByTagName("h" + headerIndex), function (header) {
|
||||
return this._getClassWeight(header) < 0;
|
||||
});
|
||||
}
|
||||
this._removeNodes(this._getAllNodesWithTag(e, ["h1", "h2"]), function (header) {
|
||||
return this._getClassWeight(header) < 0;
|
||||
});
|
||||
},
|
||||
|
||||
_flagIsActive: function(flag) {
|
||||
|
|
@ -1715,7 +2002,11 @@ Readability.prototype = {
|
|||
},
|
||||
|
||||
_isProbablyVisible: function(node) {
|
||||
return (!node.style || node.style.display != "none") && !node.hasAttribute("hidden");
|
||||
// Have to null-check node.style and node.className.indexOf to deal with SVG and MathML nodes.
|
||||
return (!node.style || node.style.display != "none")
|
||||
&& !node.hasAttribute("hidden")
|
||||
//check for "fallback-image" so that wikimedia math images are displayed
|
||||
&& (!node.hasAttribute("aria-hidden") || node.getAttribute("aria-hidden") != "true" || (node.className && node.className.indexOf && node.className.indexOf("fallback-image") !== -1));
|
||||
},
|
||||
|
||||
/**
|
||||
|
|
@ -1739,6 +2030,9 @@ Readability.prototype = {
|
|||
}
|
||||
}
|
||||
|
||||
// Unwrap image from noscript
|
||||
this._unwrapNoscriptImages(this._doc);
|
||||
|
||||
// Remove script tags from the document.
|
||||
this._removeScripts(this._doc);
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue