|
|
@@ -26,1833 +26,1952 @@
|
|
|
* @param {Object} options The options object.
|
|
|
*/
|
|
|
function Readability(doc, options) {
|
|
|
- // In some older versions, people passed a URI as the first argument. Cope:
|
|
|
- if (options && options.documentElement) {
|
|
|
- doc = options;
|
|
|
- options = arguments[2];
|
|
|
- } else if (!doc || !doc.documentElement) {
|
|
|
- throw new Error("First argument to Readability constructor should be a document object.");
|
|
|
- }
|
|
|
- options = options || {};
|
|
|
-
|
|
|
- this._doc = doc;
|
|
|
- this._articleTitle = null;
|
|
|
- this._articleByline = null;
|
|
|
- this._articleDir = null;
|
|
|
- this._articleSiteName = null;
|
|
|
- this._attempts = [];
|
|
|
-
|
|
|
- // Configurable options
|
|
|
- this._debug = !!options.debug;
|
|
|
- this._maxElemsToParse = options.maxElemsToParse || this.DEFAULT_MAX_ELEMS_TO_PARSE;
|
|
|
- this._nbTopCandidates = options.nbTopCandidates || this.DEFAULT_N_TOP_CANDIDATES;
|
|
|
- this._charThreshold = options.charThreshold || this.DEFAULT_CHAR_THRESHOLD;
|
|
|
- this._classesToPreserve = this.CLASSES_TO_PRESERVE.concat(options.classesToPreserve || []);
|
|
|
- this._keepClasses = !!options.keepClasses;
|
|
|
-
|
|
|
- // Start with all flags set
|
|
|
- this._flags = this.FLAG_STRIP_UNLIKELYS |
|
|
|
- this.FLAG_WEIGHT_CLASSES |
|
|
|
- this.FLAG_CLEAN_CONDITIONALLY;
|
|
|
-
|
|
|
- var logEl;
|
|
|
-
|
|
|
- // Control whether log messages are sent to the console
|
|
|
- if (this._debug) {
|
|
|
- logEl = function(e) {
|
|
|
- var rv = e.nodeName + " ";
|
|
|
- if (e.nodeType == e.TEXT_NODE) {
|
|
|
- return rv + '("' + e.textContent + '")';
|
|
|
- }
|
|
|
- var classDesc = e.className && ("." + e.className.replace(/ /g, "."));
|
|
|
- var elDesc = "";
|
|
|
- if (e.id)
|
|
|
- elDesc = "(#" + e.id + classDesc + ")";
|
|
|
- else if (classDesc)
|
|
|
- elDesc = "(" + classDesc + ")";
|
|
|
- return rv + elDesc;
|
|
|
- };
|
|
|
- this.log = function () {
|
|
|
- if (typeof dump !== "undefined") {
|
|
|
- var msg = Array.prototype.map.call(arguments, function(x) {
|
|
|
- return (x && x.nodeName) ? logEl(x) : x;
|
|
|
- }).join(" ");
|
|
|
- dump("Reader: (Readability) " + msg + "\n");
|
|
|
- } else if (typeof console !== "undefined") {
|
|
|
- var args = ["Reader: (Readability) "].concat(arguments);
|
|
|
- console.log.apply(console, args);
|
|
|
- }
|
|
|
- };
|
|
|
- } else {
|
|
|
- this.log = function () {};
|
|
|
- }
|
|
|
+ // In some older versions, people passed a URI as the first argument. Cope:
|
|
|
+ if (options && options.documentElement) {
|
|
|
+ doc = options;
|
|
|
+ options = arguments[2];
|
|
|
+ } else if (!doc || !doc.documentElement) {
|
|
|
+ throw new Error("First argument to Readability constructor should be a document object.");
|
|
|
}
|
|
|
-
|
|
|
- Readability.prototype = {
|
|
|
- FLAG_STRIP_UNLIKELYS: 0x1,
|
|
|
- FLAG_WEIGHT_CLASSES: 0x2,
|
|
|
- FLAG_CLEAN_CONDITIONALLY: 0x4,
|
|
|
-
|
|
|
- // https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
|
|
|
- ELEMENT_NODE: 1,
|
|
|
- TEXT_NODE: 3,
|
|
|
-
|
|
|
- // Max number of nodes supported by this parser. Default: 0 (no limit)
|
|
|
- DEFAULT_MAX_ELEMS_TO_PARSE: 0,
|
|
|
-
|
|
|
- // The number of top candidates to consider when analysing how
|
|
|
- // tight the competition is among candidates.
|
|
|
- DEFAULT_N_TOP_CANDIDATES: 5,
|
|
|
-
|
|
|
- // Element tags to score by default.
|
|
|
- DEFAULT_TAGS_TO_SCORE: "section,h2,h3,h4,h5,h6,p,td,pre".toUpperCase().split(","),
|
|
|
-
|
|
|
- // The default number of chars an article must have in order to return a result
|
|
|
- DEFAULT_CHAR_THRESHOLD: 500,
|
|
|
-
|
|
|
- // All of the regular expressions in use within readability.
|
|
|
- // Defined up here so we don't instantiate them repeatedly in loops.
|
|
|
- REGEXPS: {
|
|
|
- // NOTE: These two regular expressions are duplicated in
|
|
|
- // Readability-readerable.js. Please keep both copies in sync.
|
|
|
- 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,
|
|
|
- okMaybeItsACandidate: /and|article|body|column|content|main|shadow/i,
|
|
|
-
|
|
|
- positive: /article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story/i,
|
|
|
- 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,
|
|
|
- extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
|
|
|
- byline: /byline|author|dateline|writtenby|p-author/i,
|
|
|
- replaceFonts: /<(\/?)font[^>]*>/gi,
|
|
|
- normalize: /\s{2,}/g,
|
|
|
- videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i,
|
|
|
- shareElements: /(\b|_)(share|sharedaddy)(\b|_)/i,
|
|
|
- nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
|
|
|
- prevLink: /(prev|earl|old|new|<|«)/i,
|
|
|
- whitespace: /^\s*$/,
|
|
|
- hasContent: /\S$/,
|
|
|
- },
|
|
|
-
|
|
|
- DIV_TO_P_ELEMS: [ "A", "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL", "SELECT" ],
|
|
|
-
|
|
|
- ALTER_TO_DIV_EXCEPTIONS: ["DIV", "ARTICLE", "SECTION", "P"],
|
|
|
-
|
|
|
- PRESENTATIONAL_ATTRIBUTES: [ "align", "background", "bgcolor", "border", "cellpadding", "cellspacing", "frame", "hspace", "rules", "style", "valign", "vspace" ],
|
|
|
-
|
|
|
- DEPRECATED_SIZE_ATTRIBUTE_ELEMS: [ "TABLE", "TH", "TD", "HR", "PRE" ],
|
|
|
-
|
|
|
- // The commented out elements qualify as phrasing content but tend to be
|
|
|
- // removed by readability when put into paragraphs, so we ignore them here.
|
|
|
- PHRASING_ELEMS: [
|
|
|
- // "CANVAS", "IFRAME", "SVG", "VIDEO",
|
|
|
- "ABBR", "AUDIO", "B", "BDO", "BR", "BUTTON", "CITE", "CODE", "DATA",
|
|
|
- "DATALIST", "DFN", "EM", "EMBED", "I", "IMG", "INPUT", "KBD", "LABEL",
|
|
|
- "MARK", "MATH", "METER", "NOSCRIPT", "OBJECT", "OUTPUT", "PROGRESS", "Q",
|
|
|
- "RUBY", "SAMP", "SCRIPT", "SELECT", "SMALL", "SPAN", "STRONG", "SUB",
|
|
|
- "SUP", "TEXTAREA", "TIME", "VAR", "WBR"
|
|
|
- ],
|
|
|
-
|
|
|
- // These are the classes that readability sets itself.
|
|
|
- CLASSES_TO_PRESERVE: [ "page" ],
|
|
|
-
|
|
|
- /**
|
|
|
- * Run any post-process modifications to article content as necessary.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _postProcessContent: function(articleContent) {
|
|
|
- // Readability cannot open relative uris so we convert them to absolute uris.
|
|
|
- this._fixRelativeUris(articleContent);
|
|
|
-
|
|
|
- if (!this._keepClasses) {
|
|
|
- // Remove classes.
|
|
|
- this._cleanClasses(articleContent);
|
|
|
- }
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Iterates over a NodeList, calls `filterFn` for each node and removes node
|
|
|
- * if function returned `true`.
|
|
|
- *
|
|
|
- * If function is not passed, removes all the nodes in node list.
|
|
|
- *
|
|
|
- * @param NodeList nodeList The nodes to operate on
|
|
|
- * @param Function filterFn the function to use as a filter
|
|
|
- * @return void
|
|
|
- */
|
|
|
- _removeNodes: function(nodeList, filterFn) {
|
|
|
- for (var i = nodeList.length - 1; i >= 0; i--) {
|
|
|
- var node = nodeList[i];
|
|
|
- var parentNode = node.parentNode;
|
|
|
- if (parentNode) {
|
|
|
- if (!filterFn || filterFn.call(this, node, i, nodeList)) {
|
|
|
- parentNode.removeChild(node);
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Iterates over a NodeList, and calls _setNodeTag for each node.
|
|
|
- *
|
|
|
- * @param NodeList nodeList The nodes to operate on
|
|
|
- * @param String newTagName the new tag name to use
|
|
|
- * @return void
|
|
|
- */
|
|
|
- _replaceNodeTags: function(nodeList, newTagName) {
|
|
|
- for (var i = nodeList.length - 1; i >= 0; i--) {
|
|
|
- var node = nodeList[i];
|
|
|
- this._setNodeTag(node, newTagName);
|
|
|
- }
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Iterate over a NodeList, which doesn't natively fully implement the Array
|
|
|
- * interface.
|
|
|
- *
|
|
|
- * For convenience, the current object context is applied to the provided
|
|
|
- * iterate function.
|
|
|
- *
|
|
|
- * @param NodeList nodeList The NodeList.
|
|
|
- * @param Function fn The iterate function.
|
|
|
- * @return void
|
|
|
- */
|
|
|
- _forEachNode: function(nodeList, fn) {
|
|
|
- Array.prototype.forEach.call(nodeList, fn, this);
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Iterate over a NodeList, return true if any of the provided iterate
|
|
|
- * function calls returns true, false otherwise.
|
|
|
- *
|
|
|
- * For convenience, the current object context is applied to the
|
|
|
- * provided iterate function.
|
|
|
- *
|
|
|
- * @param NodeList nodeList The NodeList.
|
|
|
- * @param Function fn The iterate function.
|
|
|
- * @return Boolean
|
|
|
- */
|
|
|
- _someNode: function(nodeList, fn) {
|
|
|
- return Array.prototype.some.call(nodeList, fn, this);
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Iterate over a NodeList, return true if all of the provided iterate
|
|
|
- * function calls return true, false otherwise.
|
|
|
- *
|
|
|
- * For convenience, the current object context is applied to the
|
|
|
- * provided iterate function.
|
|
|
- *
|
|
|
- * @param NodeList nodeList The NodeList.
|
|
|
- * @param Function fn The iterate function.
|
|
|
- * @return Boolean
|
|
|
- */
|
|
|
- _everyNode: function(nodeList, fn) {
|
|
|
- return Array.prototype.every.call(nodeList, fn, this);
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Concat all nodelists passed as arguments.
|
|
|
- *
|
|
|
- * @return ...NodeList
|
|
|
- * @return Array
|
|
|
- */
|
|
|
- _concatNodeLists: function() {
|
|
|
- var slice = Array.prototype.slice;
|
|
|
- var args = slice.call(arguments);
|
|
|
- var nodeLists = args.map(function(list) {
|
|
|
- return slice.call(list);
|
|
|
- });
|
|
|
- return Array.prototype.concat.apply([], nodeLists);
|
|
|
- },
|
|
|
-
|
|
|
- _getAllNodesWithTag: function(node, tagNames) {
|
|
|
- if (node.querySelectorAll) {
|
|
|
- return node.querySelectorAll(tagNames.join(","));
|
|
|
- }
|
|
|
- return [].concat.apply([], tagNames.map(function(tag) {
|
|
|
- var collection = node.getElementsByTagName(tag);
|
|
|
- return Array.isArray(collection) ? collection : Array.from(collection);
|
|
|
- }));
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Removes the class="" attribute from every element in the given
|
|
|
- * subtree, except those that match CLASSES_TO_PRESERVE and
|
|
|
- * the classesToPreserve array from the options object.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return void
|
|
|
- */
|
|
|
- _cleanClasses: function(node) {
|
|
|
- var classesToPreserve = this._classesToPreserve;
|
|
|
- var className = (node.getAttribute("class") || "")
|
|
|
- .split(/\s+/)
|
|
|
- .filter(function(cls) {
|
|
|
- return classesToPreserve.indexOf(cls) != -1;
|
|
|
- })
|
|
|
- .join(" ");
|
|
|
-
|
|
|
- if (className) {
|
|
|
- node.setAttribute("class", className);
|
|
|
- } else {
|
|
|
- node.removeAttribute("class");
|
|
|
+ options = options || {};
|
|
|
+
|
|
|
+ this._doc = doc;
|
|
|
+ this._docJSDOMParser = this._doc.firstChild.__JSDOMParser__;
|
|
|
+ this._articleTitle = null;
|
|
|
+ this._articleByline = null;
|
|
|
+ this._articleDir = null;
|
|
|
+ this._articleSiteName = null;
|
|
|
+ this._attempts = [];
|
|
|
+
|
|
|
+ // Configurable options
|
|
|
+ this._debug = !!options.debug;
|
|
|
+ this._maxElemsToParse = options.maxElemsToParse || this.DEFAULT_MAX_ELEMS_TO_PARSE;
|
|
|
+ this._nbTopCandidates = options.nbTopCandidates || this.DEFAULT_N_TOP_CANDIDATES;
|
|
|
+ this._charThreshold = options.charThreshold || this.DEFAULT_CHAR_THRESHOLD;
|
|
|
+ this._classesToPreserve = this.CLASSES_TO_PRESERVE.concat(options.classesToPreserve || []);
|
|
|
+ this._keepClasses = !!options.keepClasses;
|
|
|
+
|
|
|
+ // Start with all flags set
|
|
|
+ this._flags = this.FLAG_STRIP_UNLIKELYS |
|
|
|
+ this.FLAG_WEIGHT_CLASSES |
|
|
|
+ this.FLAG_CLEAN_CONDITIONALLY;
|
|
|
+
|
|
|
+ var logEl;
|
|
|
+
|
|
|
+ // Control whether log messages are sent to the console
|
|
|
+ if (this._debug) {
|
|
|
+ logEl = function(e) {
|
|
|
+ var rv = e.nodeName + " ";
|
|
|
+ if (e.nodeType == e.TEXT_NODE) {
|
|
|
+ return rv + '("' + e.textContent + '")';
|
|
|
}
|
|
|
-
|
|
|
- for (node = node.firstElementChild; node; node = node.nextElementSibling) {
|
|
|
- this._cleanClasses(node);
|
|
|
+ var classDesc = e.className && ("." + e.className.replace(/ /g, "."));
|
|
|
+ var elDesc = "";
|
|
|
+ if (e.id)
|
|
|
+ elDesc = "(#" + e.id + classDesc + ")";
|
|
|
+ else if (classDesc)
|
|
|
+ elDesc = "(" + classDesc + ")";
|
|
|
+ return rv + elDesc;
|
|
|
+ };
|
|
|
+ this.log = function () {
|
|
|
+ if (typeof dump !== "undefined") {
|
|
|
+ var msg = Array.prototype.map.call(arguments, function(x) {
|
|
|
+ return (x && x.nodeName) ? logEl(x) : x;
|
|
|
+ }).join(" ");
|
|
|
+ dump("Reader: (Readability) " + msg + "\n");
|
|
|
+ } else if (typeof console !== "undefined") {
|
|
|
+ var args = ["Reader: (Readability) "].concat(arguments);
|
|
|
+ console.log.apply(console, args);
|
|
|
}
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Converts each <a> and <img> uri in the given element to an absolute URI,
|
|
|
- * ignoring #ref URIs.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return void
|
|
|
- */
|
|
|
- _fixRelativeUris: function(articleContent) {
|
|
|
- var baseURI = this._doc.baseURI;
|
|
|
- var documentURI = this._doc.documentURI;
|
|
|
- function toAbsoluteURI(uri) {
|
|
|
- // Leave hash links alone if the base URI matches the document URI:
|
|
|
- if (baseURI == documentURI && uri.charAt(0) == "#") {
|
|
|
- return uri;
|
|
|
- }
|
|
|
- // Otherwise, resolve against base URI:
|
|
|
- try {
|
|
|
- return new URL(uri, baseURI).href;
|
|
|
- } catch (ex) {
|
|
|
- // Something went wrong, just return the original:
|
|
|
+ };
|
|
|
+ } else {
|
|
|
+ this.log = function () {};
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+Readability.prototype = {
|
|
|
+ FLAG_STRIP_UNLIKELYS: 0x1,
|
|
|
+ FLAG_WEIGHT_CLASSES: 0x2,
|
|
|
+ FLAG_CLEAN_CONDITIONALLY: 0x4,
|
|
|
+
|
|
|
+ // https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
|
|
|
+ ELEMENT_NODE: 1,
|
|
|
+ TEXT_NODE: 3,
|
|
|
+
|
|
|
+ // Max number of nodes supported by this parser. Default: 0 (no limit)
|
|
|
+ DEFAULT_MAX_ELEMS_TO_PARSE: 0,
|
|
|
+
|
|
|
+ // The number of top candidates to consider when analysing how
|
|
|
+ // tight the competition is among candidates.
|
|
|
+ DEFAULT_N_TOP_CANDIDATES: 5,
|
|
|
+
|
|
|
+ // Element tags to score by default.
|
|
|
+ DEFAULT_TAGS_TO_SCORE: "section,h2,h3,h4,h5,h6,p,td,pre".toUpperCase().split(","),
|
|
|
+
|
|
|
+ // The default number of chars an article must have in order to return a result
|
|
|
+ DEFAULT_CHAR_THRESHOLD: 500,
|
|
|
+
|
|
|
+ // All of the regular expressions in use within readability.
|
|
|
+ // Defined up here so we don't instantiate them repeatedly in loops.
|
|
|
+ REGEXPS: {
|
|
|
+ // NOTE: These two regular expressions are duplicated in
|
|
|
+ // Readability-readerable.js. Please keep both copies in sync.
|
|
|
+ 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,
|
|
|
+ okMaybeItsACandidate: /and|article|body|column|content|main|shadow/i,
|
|
|
+
|
|
|
+ positive: /article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story/i,
|
|
|
+ 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,
|
|
|
+ extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
|
|
|
+ byline: /byline|author|dateline|writtenby|p-author/i,
|
|
|
+ replaceFonts: /<(\/?)font[^>]*>/gi,
|
|
|
+ normalize: /\s{2,}/g,
|
|
|
+ videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i,
|
|
|
+ shareElements: /(\b|_)(share|sharedaddy)(\b|_)/i,
|
|
|
+ nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
|
|
|
+ prevLink: /(prev|earl|old|new|<|«)/i,
|
|
|
+ whitespace: /^\s*$/,
|
|
|
+ hasContent: /\S$/,
|
|
|
+ },
|
|
|
+
|
|
|
+ DIV_TO_P_ELEMS: [ "A", "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL", "SELECT" ],
|
|
|
+
|
|
|
+ ALTER_TO_DIV_EXCEPTIONS: ["DIV", "ARTICLE", "SECTION", "P"],
|
|
|
+
|
|
|
+ PRESENTATIONAL_ATTRIBUTES: [ "align", "background", "bgcolor", "border", "cellpadding", "cellspacing", "frame", "hspace", "rules", "style", "valign", "vspace" ],
|
|
|
+
|
|
|
+ DEPRECATED_SIZE_ATTRIBUTE_ELEMS: [ "TABLE", "TH", "TD", "HR", "PRE" ],
|
|
|
+
|
|
|
+ // The commented out elements qualify as phrasing content but tend to be
|
|
|
+ // removed by readability when put into paragraphs, so we ignore them here.
|
|
|
+ PHRASING_ELEMS: [
|
|
|
+ // "CANVAS", "IFRAME", "SVG", "VIDEO",
|
|
|
+ "ABBR", "AUDIO", "B", "BDO", "BR", "BUTTON", "CITE", "CODE", "DATA",
|
|
|
+ "DATALIST", "DFN", "EM", "EMBED", "I", "IMG", "INPUT", "KBD", "LABEL",
|
|
|
+ "MARK", "MATH", "METER", "NOSCRIPT", "OBJECT", "OUTPUT", "PROGRESS", "Q",
|
|
|
+ "RUBY", "SAMP", "SCRIPT", "SELECT", "SMALL", "SPAN", "STRONG", "SUB",
|
|
|
+ "SUP", "TEXTAREA", "TIME", "VAR", "WBR"
|
|
|
+ ],
|
|
|
+
|
|
|
+ // These are the classes that readability sets itself.
|
|
|
+ CLASSES_TO_PRESERVE: [ "page" ],
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Run any post-process modifications to article content as necessary.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _postProcessContent: function(articleContent) {
|
|
|
+ // Readability cannot open relative uris so we convert them to absolute uris.
|
|
|
+ this._fixRelativeUris(articleContent);
|
|
|
+
|
|
|
+ if (!this._keepClasses) {
|
|
|
+ // Remove classes.
|
|
|
+ this._cleanClasses(articleContent);
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Iterates over a NodeList, calls `filterFn` for each node and removes node
|
|
|
+ * if function returned `true`.
|
|
|
+ *
|
|
|
+ * If function is not passed, removes all the nodes in node list.
|
|
|
+ *
|
|
|
+ * @param NodeList nodeList The nodes to operate on
|
|
|
+ * @param Function filterFn the function to use as a filter
|
|
|
+ * @return void
|
|
|
+ */
|
|
|
+ _removeNodes: function(nodeList, filterFn) {
|
|
|
+ // Avoid ever operating on live node lists.
|
|
|
+ if (this._docJSDOMParser && nodeList._isLiveNodeList) {
|
|
|
+ throw new Error("Do not pass live node lists to _removeNodes");
|
|
|
+ }
|
|
|
+ for (var i = nodeList.length - 1; i >= 0; i--) {
|
|
|
+ var node = nodeList[i];
|
|
|
+ var parentNode = node.parentNode;
|
|
|
+ if (parentNode) {
|
|
|
+ if (!filterFn || filterFn.call(this, node, i, nodeList)) {
|
|
|
+ parentNode.removeChild(node);
|
|
|
}
|
|
|
+ }
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Iterates over a NodeList, and calls _setNodeTag for each node.
|
|
|
+ *
|
|
|
+ * @param NodeList nodeList The nodes to operate on
|
|
|
+ * @param String newTagName the new tag name to use
|
|
|
+ * @return void
|
|
|
+ */
|
|
|
+ _replaceNodeTags: function(nodeList, newTagName) {
|
|
|
+ // Avoid ever operating on live node lists.
|
|
|
+ if (this._docJSDOMParser && nodeList._isLiveNodeList) {
|
|
|
+ throw new Error("Do not pass live node lists to _replaceNodeTags");
|
|
|
+ }
|
|
|
+ for (var i = nodeList.length - 1; i >= 0; i--) {
|
|
|
+ var node = nodeList[i];
|
|
|
+ this._setNodeTag(node, newTagName);
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Iterate over a NodeList, which doesn't natively fully implement the Array
|
|
|
+ * interface.
|
|
|
+ *
|
|
|
+ * For convenience, the current object context is applied to the provided
|
|
|
+ * iterate function.
|
|
|
+ *
|
|
|
+ * @param NodeList nodeList The NodeList.
|
|
|
+ * @param Function fn The iterate function.
|
|
|
+ * @return void
|
|
|
+ */
|
|
|
+ _forEachNode: function(nodeList, fn) {
|
|
|
+ Array.prototype.forEach.call(nodeList, fn, this);
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Iterate over a NodeList, return true if any of the provided iterate
|
|
|
+ * function calls returns true, false otherwise.
|
|
|
+ *
|
|
|
+ * For convenience, the current object context is applied to the
|
|
|
+ * provided iterate function.
|
|
|
+ *
|
|
|
+ * @param NodeList nodeList The NodeList.
|
|
|
+ * @param Function fn The iterate function.
|
|
|
+ * @return Boolean
|
|
|
+ */
|
|
|
+ _someNode: function(nodeList, fn) {
|
|
|
+ return Array.prototype.some.call(nodeList, fn, this);
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Iterate over a NodeList, return true if all of the provided iterate
|
|
|
+ * function calls return true, false otherwise.
|
|
|
+ *
|
|
|
+ * For convenience, the current object context is applied to the
|
|
|
+ * provided iterate function.
|
|
|
+ *
|
|
|
+ * @param NodeList nodeList The NodeList.
|
|
|
+ * @param Function fn The iterate function.
|
|
|
+ * @return Boolean
|
|
|
+ */
|
|
|
+ _everyNode: function(nodeList, fn) {
|
|
|
+ return Array.prototype.every.call(nodeList, fn, this);
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Concat all nodelists passed as arguments.
|
|
|
+ *
|
|
|
+ * @return ...NodeList
|
|
|
+ * @return Array
|
|
|
+ */
|
|
|
+ _concatNodeLists: function() {
|
|
|
+ var slice = Array.prototype.slice;
|
|
|
+ var args = slice.call(arguments);
|
|
|
+ var nodeLists = args.map(function(list) {
|
|
|
+ return slice.call(list);
|
|
|
+ });
|
|
|
+ return Array.prototype.concat.apply([], nodeLists);
|
|
|
+ },
|
|
|
+
|
|
|
+ _getAllNodesWithTag: function(node, tagNames) {
|
|
|
+ if (node.querySelectorAll) {
|
|
|
+ return node.querySelectorAll(tagNames.join(","));
|
|
|
+ }
|
|
|
+ return [].concat.apply([], tagNames.map(function(tag) {
|
|
|
+ var collection = node.getElementsByTagName(tag);
|
|
|
+ return Array.isArray(collection) ? collection : Array.from(collection);
|
|
|
+ }));
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Removes the class="" attribute from every element in the given
|
|
|
+ * subtree, except those that match CLASSES_TO_PRESERVE and
|
|
|
+ * the classesToPreserve array from the options object.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ */
|
|
|
+ _cleanClasses: function(node) {
|
|
|
+ var classesToPreserve = this._classesToPreserve;
|
|
|
+ var className = (node.getAttribute("class") || "")
|
|
|
+ .split(/\s+/)
|
|
|
+ .filter(function(cls) {
|
|
|
+ return classesToPreserve.indexOf(cls) != -1;
|
|
|
+ })
|
|
|
+ .join(" ");
|
|
|
+
|
|
|
+ if (className) {
|
|
|
+ node.setAttribute("class", className);
|
|
|
+ } else {
|
|
|
+ node.removeAttribute("class");
|
|
|
+ }
|
|
|
+
|
|
|
+ for (node = node.firstElementChild; node; node = node.nextElementSibling) {
|
|
|
+ this._cleanClasses(node);
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Converts each <a> and <img> uri in the given element to an absolute URI,
|
|
|
+ * ignoring #ref URIs.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ */
|
|
|
+ _fixRelativeUris: function(articleContent) {
|
|
|
+ var baseURI = this._doc.baseURI;
|
|
|
+ var documentURI = this._doc.documentURI;
|
|
|
+ function toAbsoluteURI(uri) {
|
|
|
+ // Leave hash links alone if the base URI matches the document URI:
|
|
|
+ if (baseURI == documentURI && uri.charAt(0) == "#") {
|
|
|
return uri;
|
|
|
}
|
|
|
-
|
|
|
- var links = this._getAllNodesWithTag(articleContent, ["a"]);
|
|
|
- this._forEachNode(links, function(link) {
|
|
|
- var href = link.getAttribute("href");
|
|
|
- if (href) {
|
|
|
- // Replace links with javascript: URIs with text content, since
|
|
|
- // they won't work after scripts have been removed from the page.
|
|
|
- if (href.indexOf("javascript:") === 0) {
|
|
|
+ // Otherwise, resolve against base URI:
|
|
|
+ try {
|
|
|
+ return new URL(uri, baseURI).href;
|
|
|
+ } catch (ex) {
|
|
|
+ // Something went wrong, just return the original:
|
|
|
+ }
|
|
|
+ return uri;
|
|
|
+ }
|
|
|
+
|
|
|
+ var links = this._getAllNodesWithTag(articleContent, ["a"]);
|
|
|
+ this._forEachNode(links, function(link) {
|
|
|
+ var href = link.getAttribute("href");
|
|
|
+ if (href) {
|
|
|
+ // Remove links with javascript: URIs, since
|
|
|
+ // they won't work after scripts have been removed from the page.
|
|
|
+ if (href.indexOf("javascript:") === 0) {
|
|
|
+ // if the link only contains simple text content, it can be converted to a text node
|
|
|
+ if (link.childNodes.length === 1 && link.childNodes[0].nodeType === this.TEXT_NODE) {
|
|
|
var text = this._doc.createTextNode(link.textContent);
|
|
|
link.parentNode.replaceChild(text, link);
|
|
|
} else {
|
|
|
- link.setAttribute("href", toAbsoluteURI(href));
|
|
|
- }
|
|
|
- }
|
|
|
- });
|
|
|
-
|
|
|
- var imgs = this._getAllNodesWithTag(articleContent, ["img"]);
|
|
|
- this._forEachNode(imgs, function(img) {
|
|
|
- var src = img.getAttribute("src");
|
|
|
- if (src) {
|
|
|
- img.setAttribute("src", toAbsoluteURI(src));
|
|
|
- }
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Get the article title as an H1.
|
|
|
- *
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _getArticleTitle: function() {
|
|
|
- var doc = this._doc;
|
|
|
- var curTitle = "";
|
|
|
- var origTitle = "";
|
|
|
-
|
|
|
- try {
|
|
|
- curTitle = origTitle = doc.title.trim();
|
|
|
-
|
|
|
- // If they had an element with id "title" in their HTML
|
|
|
- if (typeof curTitle !== "string")
|
|
|
- curTitle = origTitle = this._getInnerText(doc.getElementsByTagName("title")[0]);
|
|
|
- } catch (e) {/* ignore exceptions setting the title. */}
|
|
|
-
|
|
|
- var titleHadHierarchicalSeparators = false;
|
|
|
- function wordCount(str) {
|
|
|
- return str.split(/\s+/).length;
|
|
|
- }
|
|
|
-
|
|
|
- // If there's a separator in the title, first remove the final part
|
|
|
- if ((/ [\|\-\\\/>»] /).test(curTitle)) {
|
|
|
- titleHadHierarchicalSeparators = / [\\\/>»] /.test(curTitle);
|
|
|
- curTitle = origTitle.replace(/(.*)[\|\-\\\/>»] .*/gi, "$1");
|
|
|
-
|
|
|
- // If the resulting title is too short (3 words or fewer), remove
|
|
|
- // the first part instead:
|
|
|
- if (wordCount(curTitle) < 3)
|
|
|
- curTitle = origTitle.replace(/[^\|\-\\\/>»]*[\|\-\\\/>»](.*)/gi, "$1");
|
|
|
- } else if (curTitle.indexOf(": ") !== -1) {
|
|
|
- // Check if we have an heading containing this exact string, so we
|
|
|
- // could assume it's the full title.
|
|
|
- var headings = this._concatNodeLists(
|
|
|
- doc.getElementsByTagName("h1"),
|
|
|
- doc.getElementsByTagName("h2")
|
|
|
- );
|
|
|
- var trimmedTitle = curTitle.trim();
|
|
|
- var match = this._someNode(headings, function(heading) {
|
|
|
- return heading.textContent.trim() === trimmedTitle;
|
|
|
- });
|
|
|
-
|
|
|
- // If we don't, let's extract the title out of the original title string.
|
|
|
- if (!match) {
|
|
|
- curTitle = origTitle.substring(origTitle.lastIndexOf(":") + 1);
|
|
|
-
|
|
|
- // If the title is now too short, try the first colon instead:
|
|
|
- if (wordCount(curTitle) < 3) {
|
|
|
- curTitle = origTitle.substring(origTitle.indexOf(":") + 1);
|
|
|
- // But if we have too many words before the colon there's something weird
|
|
|
- // with the titles and the H tags so let's just use the original title instead
|
|
|
- } else if (wordCount(origTitle.substr(0, origTitle.indexOf(":"))) > 5) {
|
|
|
- curTitle = origTitle;
|
|
|
+ // if the link has multiple children, they should all be preserved
|
|
|
+ var container = this._doc.createElement("span");
|
|
|
+ while (link.childNodes.length > 0) {
|
|
|
+ container.appendChild(link.childNodes[0]);
|
|
|
+ }
|
|
|
+ link.parentNode.replaceChild(container, link);
|
|
|
}
|
|
|
+ } else {
|
|
|
+ link.setAttribute("href", toAbsoluteURI(href));
|
|
|
}
|
|
|
- } else if (curTitle.length > 150 || curTitle.length < 15) {
|
|
|
- var hOnes = doc.getElementsByTagName("h1");
|
|
|
-
|
|
|
- if (hOnes.length === 1)
|
|
|
- curTitle = this._getInnerText(hOnes[0]);
|
|
|
}
|
|
|
-
|
|
|
- curTitle = curTitle.trim().replace(this.REGEXPS.normalize, " ");
|
|
|
- // If we now have 4 words or fewer as our title, and either no
|
|
|
- // 'hierarchical' separators (\, /, > or ») were found in the original
|
|
|
- // title or we decreased the number of words by more than 1 word, use
|
|
|
- // the original title.
|
|
|
- var curTitleWordCount = wordCount(curTitle);
|
|
|
- if (curTitleWordCount <= 4 &&
|
|
|
- (!titleHadHierarchicalSeparators ||
|
|
|
- curTitleWordCount != wordCount(origTitle.replace(/[\|\-\\\/>»]+/g, "")) - 1)) {
|
|
|
- curTitle = origTitle;
|
|
|
+ });
|
|
|
+
|
|
|
+ var imgs = this._getAllNodesWithTag(articleContent, ["img"]);
|
|
|
+ this._forEachNode(imgs, function(img) {
|
|
|
+ var src = img.getAttribute("src");
|
|
|
+ if (src) {
|
|
|
+ img.setAttribute("src", toAbsoluteURI(src));
|
|
|
}
|
|
|
-
|
|
|
- return curTitle;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Prepare the HTML document for readability to scrape it.
|
|
|
- * This includes things like stripping javascript, CSS, and handling terrible markup.
|
|
|
- *
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _prepDocument: function() {
|
|
|
- var doc = this._doc;
|
|
|
-
|
|
|
- // Remove all style tags in head
|
|
|
- this._removeNodes(doc.getElementsByTagName("style"));
|
|
|
-
|
|
|
- if (doc.body) {
|
|
|
- this._replaceBrs(doc.body);
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the article title as an H1.
|
|
|
+ *
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _getArticleTitle: function() {
|
|
|
+ var doc = this._doc;
|
|
|
+ var curTitle = "";
|
|
|
+ var origTitle = "";
|
|
|
+
|
|
|
+ try {
|
|
|
+ curTitle = origTitle = doc.title.trim();
|
|
|
+
|
|
|
+ // If they had an element with id "title" in their HTML
|
|
|
+ if (typeof curTitle !== "string")
|
|
|
+ curTitle = origTitle = this._getInnerText(doc.getElementsByTagName("title")[0]);
|
|
|
+ } catch (e) {/* ignore exceptions setting the title. */}
|
|
|
+
|
|
|
+ var titleHadHierarchicalSeparators = false;
|
|
|
+ function wordCount(str) {
|
|
|
+ return str.split(/\s+/).length;
|
|
|
+ }
|
|
|
+
|
|
|
+ // If there's a separator in the title, first remove the final part
|
|
|
+ if ((/ [\|\-\\\/>»] /).test(curTitle)) {
|
|
|
+ titleHadHierarchicalSeparators = / [\\\/>»] /.test(curTitle);
|
|
|
+ curTitle = origTitle.replace(/(.*)[\|\-\\\/>»] .*/gi, "$1");
|
|
|
+
|
|
|
+ // If the resulting title is too short (3 words or fewer), remove
|
|
|
+ // the first part instead:
|
|
|
+ if (wordCount(curTitle) < 3)
|
|
|
+ curTitle = origTitle.replace(/[^\|\-\\\/>»]*[\|\-\\\/>»](.*)/gi, "$1");
|
|
|
+ } else if (curTitle.indexOf(": ") !== -1) {
|
|
|
+ // Check if we have an heading containing this exact string, so we
|
|
|
+ // could assume it's the full title.
|
|
|
+ var headings = this._concatNodeLists(
|
|
|
+ doc.getElementsByTagName("h1"),
|
|
|
+ doc.getElementsByTagName("h2")
|
|
|
+ );
|
|
|
+ var trimmedTitle = curTitle.trim();
|
|
|
+ var match = this._someNode(headings, function(heading) {
|
|
|
+ return heading.textContent.trim() === trimmedTitle;
|
|
|
+ });
|
|
|
+
|
|
|
+ // If we don't, let's extract the title out of the original title string.
|
|
|
+ if (!match) {
|
|
|
+ curTitle = origTitle.substring(origTitle.lastIndexOf(":") + 1);
|
|
|
+
|
|
|
+ // If the title is now too short, try the first colon instead:
|
|
|
+ if (wordCount(curTitle) < 3) {
|
|
|
+ curTitle = origTitle.substring(origTitle.indexOf(":") + 1);
|
|
|
+ // But if we have too many words before the colon there's something weird
|
|
|
+ // with the titles and the H tags so let's just use the original title instead
|
|
|
+ } else if (wordCount(origTitle.substr(0, origTitle.indexOf(":"))) > 5) {
|
|
|
+ curTitle = origTitle;
|
|
|
+ }
|
|
|
}
|
|
|
-
|
|
|
- this._replaceNodeTags(doc.getElementsByTagName("font"), "SPAN");
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Finds the next element, starting from the given node, and ignoring
|
|
|
- * whitespace in between. If the given node is an element, the same node is
|
|
|
- * returned.
|
|
|
- */
|
|
|
- _nextElement: function (node) {
|
|
|
- var next = node;
|
|
|
- while (next
|
|
|
- && (next.nodeType != this.ELEMENT_NODE)
|
|
|
- && this.REGEXPS.whitespace.test(next.textContent)) {
|
|
|
- next = next.nextSibling;
|
|
|
+ } else if (curTitle.length > 150 || curTitle.length < 15) {
|
|
|
+ var hOnes = doc.getElementsByTagName("h1");
|
|
|
+
|
|
|
+ if (hOnes.length === 1)
|
|
|
+ curTitle = this._getInnerText(hOnes[0]);
|
|
|
+ }
|
|
|
+
|
|
|
+ curTitle = curTitle.trim().replace(this.REGEXPS.normalize, " ");
|
|
|
+ // If we now have 4 words or fewer as our title, and either no
|
|
|
+ // 'hierarchical' separators (\, /, > or ») were found in the original
|
|
|
+ // title or we decreased the number of words by more than 1 word, use
|
|
|
+ // the original title.
|
|
|
+ var curTitleWordCount = wordCount(curTitle);
|
|
|
+ if (curTitleWordCount <= 4 &&
|
|
|
+ (!titleHadHierarchicalSeparators ||
|
|
|
+ curTitleWordCount != wordCount(origTitle.replace(/[\|\-\\\/>»]+/g, "")) - 1)) {
|
|
|
+ curTitle = origTitle;
|
|
|
+ }
|
|
|
+
|
|
|
+ return curTitle;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Prepare the HTML document for readability to scrape it.
|
|
|
+ * This includes things like stripping javascript, CSS, and handling terrible markup.
|
|
|
+ *
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _prepDocument: function() {
|
|
|
+ var doc = this._doc;
|
|
|
+
|
|
|
+ // Remove all style tags in head
|
|
|
+ this._removeNodes(this._getAllNodesWithTag(doc, ["style"]));
|
|
|
+
|
|
|
+ if (doc.body) {
|
|
|
+ this._replaceBrs(doc.body);
|
|
|
+ }
|
|
|
+
|
|
|
+ this._replaceNodeTags(this._getAllNodesWithTag(doc, ["font"]), "SPAN");
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Finds the next element, starting from the given node, and ignoring
|
|
|
+ * whitespace in between. If the given node is an element, the same node is
|
|
|
+ * returned.
|
|
|
+ */
|
|
|
+ _nextElement: function (node) {
|
|
|
+ var next = node;
|
|
|
+ while (next
|
|
|
+ && (next.nodeType != this.ELEMENT_NODE)
|
|
|
+ && this.REGEXPS.whitespace.test(next.textContent)) {
|
|
|
+ next = next.nextSibling;
|
|
|
+ }
|
|
|
+ return next;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Replaces 2 or more successive <br> elements with a single <p>.
|
|
|
+ * Whitespace between <br> elements are ignored. For example:
|
|
|
+ * <div>foo<br>bar<br> <br><br>abc</div>
|
|
|
+ * will become:
|
|
|
+ * <div>foo<br>bar<p>abc</p></div>
|
|
|
+ */
|
|
|
+ _replaceBrs: function (elem) {
|
|
|
+ this._forEachNode(this._getAllNodesWithTag(elem, ["br"]), function(br) {
|
|
|
+ var next = br.nextSibling;
|
|
|
+
|
|
|
+ // Whether 2 or more <br> elements have been found and replaced with a
|
|
|
+ // <p> block.
|
|
|
+ var replaced = false;
|
|
|
+
|
|
|
+ // If we find a <br> chain, remove the <br>s until we hit another element
|
|
|
+ // or non-whitespace. This leaves behind the first <br> in the chain
|
|
|
+ // (which will be replaced with a <p> later).
|
|
|
+ while ((next = this._nextElement(next)) && (next.tagName == "BR")) {
|
|
|
+ replaced = true;
|
|
|
+ var brSibling = next.nextSibling;
|
|
|
+ next.parentNode.removeChild(next);
|
|
|
+ next = brSibling;
|
|
|
}
|
|
|
- return next;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Replaces 2 or more successive <br> elements with a single <p>.
|
|
|
- * Whitespace between <br> elements are ignored. For example:
|
|
|
- * <div>foo<br>bar<br> <br><br>abc</div>
|
|
|
- * will become:
|
|
|
- * <div>foo<br>bar<p>abc</p></div>
|
|
|
- */
|
|
|
- _replaceBrs: function (elem) {
|
|
|
- this._forEachNode(this._getAllNodesWithTag(elem, ["br"]), function(br) {
|
|
|
- var next = br.nextSibling;
|
|
|
-
|
|
|
- // Whether 2 or more <br> elements have been found and replaced with a
|
|
|
- // <p> block.
|
|
|
- var replaced = false;
|
|
|
-
|
|
|
- // If we find a <br> chain, remove the <br>s until we hit another element
|
|
|
- // or non-whitespace. This leaves behind the first <br> in the chain
|
|
|
- // (which will be replaced with a <p> later).
|
|
|
- while ((next = this._nextElement(next)) && (next.tagName == "BR")) {
|
|
|
- replaced = true;
|
|
|
- var brSibling = next.nextSibling;
|
|
|
- next.parentNode.removeChild(next);
|
|
|
- next = brSibling;
|
|
|
- }
|
|
|
-
|
|
|
- // If we removed a <br> chain, replace the remaining <br> with a <p>. Add
|
|
|
- // all sibling nodes as children of the <p> until we hit another <br>
|
|
|
- // chain.
|
|
|
- if (replaced) {
|
|
|
- var p = this._doc.createElement("p");
|
|
|
- br.parentNode.replaceChild(p, br);
|
|
|
-
|
|
|
- next = p.nextSibling;
|
|
|
- while (next) {
|
|
|
- // If we've hit another <br><br>, we're done adding children to this <p>.
|
|
|
- if (next.tagName == "BR") {
|
|
|
- var nextElem = this._nextElement(next.nextSibling);
|
|
|
- if (nextElem && nextElem.tagName == "BR")
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- if (!this._isPhrasingContent(next))
|
|
|
+
|
|
|
+ // If we removed a <br> chain, replace the remaining <br> with a <p>. Add
|
|
|
+ // all sibling nodes as children of the <p> until we hit another <br>
|
|
|
+ // chain.
|
|
|
+ if (replaced) {
|
|
|
+ var p = this._doc.createElement("p");
|
|
|
+ br.parentNode.replaceChild(p, br);
|
|
|
+
|
|
|
+ next = p.nextSibling;
|
|
|
+ while (next) {
|
|
|
+ // If we've hit another <br><br>, we're done adding children to this <p>.
|
|
|
+ if (next.tagName == "BR") {
|
|
|
+ var nextElem = this._nextElement(next.nextSibling);
|
|
|
+ if (nextElem && nextElem.tagName == "BR")
|
|
|
break;
|
|
|
-
|
|
|
- // Otherwise, make this node a child of the new <p>.
|
|
|
- var sibling = next.nextSibling;
|
|
|
- p.appendChild(next);
|
|
|
- next = sibling;
|
|
|
}
|
|
|
-
|
|
|
- while (p.lastChild && this._isWhitespace(p.lastChild)) {
|
|
|
- p.removeChild(p.lastChild);
|
|
|
- }
|
|
|
-
|
|
|
- if (p.parentNode.tagName === "P")
|
|
|
- this._setNodeTag(p.parentNode, "DIV");
|
|
|
+
|
|
|
+ if (!this._isPhrasingContent(next))
|
|
|
+ break;
|
|
|
+
|
|
|
+ // Otherwise, make this node a child of the new <p>.
|
|
|
+ var sibling = next.nextSibling;
|
|
|
+ p.appendChild(next);
|
|
|
+ next = sibling;
|
|
|
}
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- _setNodeTag: function (node, tag) {
|
|
|
- this.log("_setNodeTag", node, tag);
|
|
|
- if (node.__JSDOMParser__) {
|
|
|
- node.localName = tag.toLowerCase();
|
|
|
- node.tagName = tag.toUpperCase();
|
|
|
- return node;
|
|
|
- }
|
|
|
-
|
|
|
- var replacement = node.ownerDocument.createElement(tag);
|
|
|
- while (node.firstChild) {
|
|
|
- replacement.appendChild(node.firstChild);
|
|
|
- }
|
|
|
- node.parentNode.replaceChild(replacement, node);
|
|
|
- if (node.readability)
|
|
|
- replacement.readability = node.readability;
|
|
|
-
|
|
|
- for (var i = 0; i < node.attributes.length; i++) {
|
|
|
- try {
|
|
|
- replacement.setAttribute(node.attributes[i].name, node.attributes[i].value);
|
|
|
- } catch (ex) {
|
|
|
- /* it's possible for setAttribute() to throw if the attribute name
|
|
|
- * isn't a valid XML Name. Such attributes can however be parsed from
|
|
|
- * source in HTML docs, see https://github.com/whatwg/html/issues/4275,
|
|
|
- * so we can hit them here and then throw. We don't care about such
|
|
|
- * attributes so we ignore them.
|
|
|
- */
|
|
|
+
|
|
|
+ while (p.lastChild && this._isWhitespace(p.lastChild)) {
|
|
|
+ p.removeChild(p.lastChild);
|
|
|
}
|
|
|
+
|
|
|
+ if (p.parentNode.tagName === "P")
|
|
|
+ this._setNodeTag(p.parentNode, "DIV");
|
|
|
}
|
|
|
- return replacement;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Prepare the article node for display. Clean out any inline styles,
|
|
|
- * iframes, forms, strip extraneous <p> tags, etc.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _prepArticle: function(articleContent) {
|
|
|
- this._cleanStyles(articleContent);
|
|
|
-
|
|
|
- // Check for data tables before we continue, to avoid removing items in
|
|
|
- // those tables, which will often be isolated even though they're
|
|
|
- // visually linked to other content-ful elements (text, images, etc.).
|
|
|
- this._markDataTables(articleContent);
|
|
|
-
|
|
|
- this._fixLazyImages(articleContent);
|
|
|
-
|
|
|
- // Clean out junk from the article content
|
|
|
- this._cleanConditionally(articleContent, "form");
|
|
|
- this._cleanConditionally(articleContent, "fieldset");
|
|
|
- this._clean(articleContent, "object");
|
|
|
- this._clean(articleContent, "embed");
|
|
|
- this._clean(articleContent, "h1");
|
|
|
- this._clean(articleContent, "footer");
|
|
|
- this._clean(articleContent, "link");
|
|
|
- this._clean(articleContent, "aside");
|
|
|
-
|
|
|
- // Clean out elements with little content that have "share" in their id/class combinations from final top candidates,
|
|
|
- // which means we don't remove the top candidates even they have "share".
|
|
|
-
|
|
|
- var shareElementThreshold = this.DEFAULT_CHAR_THRESHOLD;
|
|
|
-
|
|
|
- this._forEachNode(articleContent.children, function (topCandidate) {
|
|
|
- this._cleanMatchedNodes(topCandidate, function (node, matchString) {
|
|
|
- return this.REGEXPS.shareElements.test(matchString) && node.textContent.length < shareElementThreshold;
|
|
|
- });
|
|
|
- });
|
|
|
-
|
|
|
- // If there is only one h2 and its text content substantially equals article title,
|
|
|
- // they are probably using it as a header and not a subheader,
|
|
|
- // so remove it since we already extract the title separately.
|
|
|
- var h2 = articleContent.getElementsByTagName("h2");
|
|
|
- if (h2.length === 1) {
|
|
|
- var lengthSimilarRate = (h2[0].textContent.length - this._articleTitle.length) / this._articleTitle.length;
|
|
|
- if (Math.abs(lengthSimilarRate) < 0.5) {
|
|
|
- var titlesMatch = false;
|
|
|
- if (lengthSimilarRate > 0) {
|
|
|
- titlesMatch = h2[0].textContent.includes(this._articleTitle);
|
|
|
- } else {
|
|
|
- titlesMatch = this._articleTitle.includes(h2[0].textContent);
|
|
|
- }
|
|
|
- if (titlesMatch) {
|
|
|
- this._clean(articleContent, "h2");
|
|
|
- }
|
|
|
- }
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ _setNodeTag: function (node, tag) {
|
|
|
+ this.log("_setNodeTag", node, tag);
|
|
|
+ if (this._docJSDOMParser) {
|
|
|
+ node.localName = tag.toLowerCase();
|
|
|
+ node.tagName = tag.toUpperCase();
|
|
|
+ return node;
|
|
|
+ }
|
|
|
+
|
|
|
+ var replacement = node.ownerDocument.createElement(tag);
|
|
|
+ while (node.firstChild) {
|
|
|
+ replacement.appendChild(node.firstChild);
|
|
|
+ }
|
|
|
+ node.parentNode.replaceChild(replacement, node);
|
|
|
+ if (node.readability)
|
|
|
+ replacement.readability = node.readability;
|
|
|
+
|
|
|
+ for (var i = 0; i < node.attributes.length; i++) {
|
|
|
+ try {
|
|
|
+ replacement.setAttribute(node.attributes[i].name, node.attributes[i].value);
|
|
|
+ } catch (ex) {
|
|
|
+ /* it's possible for setAttribute() to throw if the attribute name
|
|
|
+ * isn't a valid XML Name. Such attributes can however be parsed from
|
|
|
+ * source in HTML docs, see https://github.com/whatwg/html/issues/4275,
|
|
|
+ * so we can hit them here and then throw. We don't care about such
|
|
|
+ * attributes so we ignore them.
|
|
|
+ */
|
|
|
}
|
|
|
-
|
|
|
- this._clean(articleContent, "iframe");
|
|
|
- this._clean(articleContent, "input");
|
|
|
- this._clean(articleContent, "textarea");
|
|
|
- this._clean(articleContent, "select");
|
|
|
- this._clean(articleContent, "button");
|
|
|
- this._cleanHeaders(articleContent);
|
|
|
-
|
|
|
- // Do these last as the previous stuff may have removed junk
|
|
|
- // that will affect these
|
|
|
- this._cleanConditionally(articleContent, "table");
|
|
|
- this._cleanConditionally(articleContent, "ul");
|
|
|
- this._cleanConditionally(articleContent, "div");
|
|
|
-
|
|
|
- // Remove extra paragraphs
|
|
|
- this._removeNodes(articleContent.getElementsByTagName("p"), function (paragraph) {
|
|
|
- var imgCount = paragraph.getElementsByTagName("img").length;
|
|
|
- var embedCount = paragraph.getElementsByTagName("embed").length;
|
|
|
- var objectCount = paragraph.getElementsByTagName("object").length;
|
|
|
- // At this point, nasty iframes have been removed, only remain embedded video ones.
|
|
|
- var iframeCount = paragraph.getElementsByTagName("iframe").length;
|
|
|
- var totalCount = imgCount + embedCount + objectCount + iframeCount;
|
|
|
-
|
|
|
- return totalCount === 0 && !this._getInnerText(paragraph, false);
|
|
|
- });
|
|
|
-
|
|
|
- this._forEachNode(this._getAllNodesWithTag(articleContent, ["br"]), function(br) {
|
|
|
- var next = this._nextElement(br.nextSibling);
|
|
|
- if (next && next.tagName == "P")
|
|
|
- br.parentNode.removeChild(br);
|
|
|
+ }
|
|
|
+ return replacement;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Prepare the article node for display. Clean out any inline styles,
|
|
|
+ * iframes, forms, strip extraneous <p> tags, etc.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _prepArticle: function(articleContent) {
|
|
|
+ this._cleanStyles(articleContent);
|
|
|
+
|
|
|
+ // Check for data tables before we continue, to avoid removing items in
|
|
|
+ // those tables, which will often be isolated even though they're
|
|
|
+ // visually linked to other content-ful elements (text, images, etc.).
|
|
|
+ this._markDataTables(articleContent);
|
|
|
+
|
|
|
+ this._fixLazyImages(articleContent);
|
|
|
+
|
|
|
+ // Clean out junk from the article content
|
|
|
+ this._cleanConditionally(articleContent, "form");
|
|
|
+ this._cleanConditionally(articleContent, "fieldset");
|
|
|
+ this._clean(articleContent, "object");
|
|
|
+ this._clean(articleContent, "embed");
|
|
|
+ this._clean(articleContent, "h1");
|
|
|
+ this._clean(articleContent, "footer");
|
|
|
+ this._clean(articleContent, "link");
|
|
|
+ this._clean(articleContent, "aside");
|
|
|
+
|
|
|
+ // Clean out elements with little content that have "share" in their id/class combinations from final top candidates,
|
|
|
+ // which means we don't remove the top candidates even they have "share".
|
|
|
+
|
|
|
+ var shareElementThreshold = this.DEFAULT_CHAR_THRESHOLD;
|
|
|
+
|
|
|
+ this._forEachNode(articleContent.children, function (topCandidate) {
|
|
|
+ this._cleanMatchedNodes(topCandidate, function (node, matchString) {
|
|
|
+ return this.REGEXPS.shareElements.test(matchString) && node.textContent.length < shareElementThreshold;
|
|
|
});
|
|
|
-
|
|
|
- // Remove single-cell tables
|
|
|
- this._forEachNode(this._getAllNodesWithTag(articleContent, ["table"]), function(table) {
|
|
|
- var tbody = this._hasSingleTagInsideElement(table, "TBODY") ? table.firstElementChild : table;
|
|
|
- if (this._hasSingleTagInsideElement(tbody, "TR")) {
|
|
|
- var row = tbody.firstElementChild;
|
|
|
- if (this._hasSingleTagInsideElement(row, "TD")) {
|
|
|
- var cell = row.firstElementChild;
|
|
|
- cell = this._setNodeTag(cell, this._everyNode(cell.childNodes, this._isPhrasingContent) ? "P" : "DIV");
|
|
|
- table.parentNode.replaceChild(cell, table);
|
|
|
- }
|
|
|
+ });
|
|
|
+
|
|
|
+ // If there is only one h2 and its text content substantially equals article title,
|
|
|
+ // they are probably using it as a header and not a subheader,
|
|
|
+ // so remove it since we already extract the title separately.
|
|
|
+ var h2 = articleContent.getElementsByTagName("h2");
|
|
|
+ if (h2.length === 1) {
|
|
|
+ var lengthSimilarRate = (h2[0].textContent.length - this._articleTitle.length) / this._articleTitle.length;
|
|
|
+ if (Math.abs(lengthSimilarRate) < 0.5) {
|
|
|
+ var titlesMatch = false;
|
|
|
+ if (lengthSimilarRate > 0) {
|
|
|
+ titlesMatch = h2[0].textContent.includes(this._articleTitle);
|
|
|
+ } else {
|
|
|
+ titlesMatch = this._articleTitle.includes(h2[0].textContent);
|
|
|
+ }
|
|
|
+ if (titlesMatch) {
|
|
|
+ this._clean(articleContent, "h2");
|
|
|
}
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Initialize a node with the readability object. Also checks the
|
|
|
- * className/id for special names to add to its score.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _initializeNode: function(node) {
|
|
|
- node.readability = {"contentScore": 0};
|
|
|
-
|
|
|
- switch (node.tagName) {
|
|
|
- case "DIV":
|
|
|
- node.readability.contentScore += 5;
|
|
|
- break;
|
|
|
-
|
|
|
- case "PRE":
|
|
|
- case "TD":
|
|
|
- case "BLOCKQUOTE":
|
|
|
- node.readability.contentScore += 3;
|
|
|
- break;
|
|
|
-
|
|
|
- case "ADDRESS":
|
|
|
- case "OL":
|
|
|
- case "UL":
|
|
|
- case "DL":
|
|
|
- case "DD":
|
|
|
- case "DT":
|
|
|
- case "LI":
|
|
|
- case "FORM":
|
|
|
- node.readability.contentScore -= 3;
|
|
|
- break;
|
|
|
-
|
|
|
- case "H1":
|
|
|
- case "H2":
|
|
|
- case "H3":
|
|
|
- case "H4":
|
|
|
- case "H5":
|
|
|
- case "H6":
|
|
|
- case "TH":
|
|
|
- node.readability.contentScore -= 5;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- node.readability.contentScore += this._getClassWeight(node);
|
|
|
- },
|
|
|
-
|
|
|
- _removeAndGetNext: function(node) {
|
|
|
- var nextNode = this._getNextNode(node, true);
|
|
|
- node.parentNode.removeChild(node);
|
|
|
- return nextNode;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Traverse the DOM from node to node, starting at the node passed in.
|
|
|
- * Pass true for the second parameter to indicate this node itself
|
|
|
- * (and its kids) are going away, and we want the next node over.
|
|
|
- *
|
|
|
- * Calling this in a loop will traverse the DOM depth-first.
|
|
|
- */
|
|
|
- _getNextNode: function(node, ignoreSelfAndKids) {
|
|
|
- // First check for kids if those aren't being ignored
|
|
|
- if (!ignoreSelfAndKids && node.firstElementChild) {
|
|
|
- return node.firstElementChild;
|
|
|
- }
|
|
|
- // Then for siblings...
|
|
|
- if (node.nextElementSibling) {
|
|
|
- return node.nextElementSibling;
|
|
|
- }
|
|
|
- // And finally, move up the parent chain *and* find a sibling
|
|
|
- // (because this is depth-first traversal, we will have already
|
|
|
- // seen the parent nodes themselves).
|
|
|
- do {
|
|
|
- node = node.parentNode;
|
|
|
- } while (node && !node.nextElementSibling);
|
|
|
- return node && node.nextElementSibling;
|
|
|
- },
|
|
|
-
|
|
|
- _checkByline: function(node, matchString) {
|
|
|
- if (this._articleByline) {
|
|
|
- return false;
|
|
|
- }
|
|
|
-
|
|
|
- if (node.getAttribute !== undefined) {
|
|
|
- var rel = node.getAttribute("rel");
|
|
|
- var itemprop = node.getAttribute("itemprop");
|
|
|
}
|
|
|
-
|
|
|
- if ((rel === "author" || (itemprop && itemprop.indexOf("author") !== -1) || this.REGEXPS.byline.test(matchString)) && this._isValidByline(node.textContent)) {
|
|
|
- this._articleByline = node.textContent.trim();
|
|
|
- return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ this._clean(articleContent, "iframe");
|
|
|
+ this._clean(articleContent, "input");
|
|
|
+ this._clean(articleContent, "textarea");
|
|
|
+ this._clean(articleContent, "select");
|
|
|
+ this._clean(articleContent, "button");
|
|
|
+ this._cleanHeaders(articleContent);
|
|
|
+
|
|
|
+ // Do these last as the previous stuff may have removed junk
|
|
|
+ // that will affect these
|
|
|
+ this._cleanConditionally(articleContent, "table");
|
|
|
+ this._cleanConditionally(articleContent, "ul");
|
|
|
+ this._cleanConditionally(articleContent, "div");
|
|
|
+
|
|
|
+ // Remove extra paragraphs
|
|
|
+ this._removeNodes(this._getAllNodesWithTag(articleContent, ["p"]), function (paragraph) {
|
|
|
+ var imgCount = paragraph.getElementsByTagName("img").length;
|
|
|
+ var embedCount = paragraph.getElementsByTagName("embed").length;
|
|
|
+ var objectCount = paragraph.getElementsByTagName("object").length;
|
|
|
+ // At this point, nasty iframes have been removed, only remain embedded video ones.
|
|
|
+ var iframeCount = paragraph.getElementsByTagName("iframe").length;
|
|
|
+ var totalCount = imgCount + embedCount + objectCount + iframeCount;
|
|
|
+
|
|
|
+ return totalCount === 0 && !this._getInnerText(paragraph, false);
|
|
|
+ });
|
|
|
+
|
|
|
+ this._forEachNode(this._getAllNodesWithTag(articleContent, ["br"]), function(br) {
|
|
|
+ var next = this._nextElement(br.nextSibling);
|
|
|
+ if (next && next.tagName == "P")
|
|
|
+ br.parentNode.removeChild(br);
|
|
|
+ });
|
|
|
+
|
|
|
+ // Remove single-cell tables
|
|
|
+ this._forEachNode(this._getAllNodesWithTag(articleContent, ["table"]), function(table) {
|
|
|
+ var tbody = this._hasSingleTagInsideElement(table, "TBODY") ? table.firstElementChild : table;
|
|
|
+ if (this._hasSingleTagInsideElement(tbody, "TR")) {
|
|
|
+ var row = tbody.firstElementChild;
|
|
|
+ if (this._hasSingleTagInsideElement(row, "TD")) {
|
|
|
+ var cell = row.firstElementChild;
|
|
|
+ cell = this._setNodeTag(cell, this._everyNode(cell.childNodes, this._isPhrasingContent) ? "P" : "DIV");
|
|
|
+ table.parentNode.replaceChild(cell, table);
|
|
|
+ }
|
|
|
}
|
|
|
-
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Initialize a node with the readability object. Also checks the
|
|
|
+ * className/id for special names to add to its score.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _initializeNode: function(node) {
|
|
|
+ node.readability = {"contentScore": 0};
|
|
|
+
|
|
|
+ switch (node.tagName) {
|
|
|
+ case "DIV":
|
|
|
+ node.readability.contentScore += 5;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case "PRE":
|
|
|
+ case "TD":
|
|
|
+ case "BLOCKQUOTE":
|
|
|
+ node.readability.contentScore += 3;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case "ADDRESS":
|
|
|
+ case "OL":
|
|
|
+ case "UL":
|
|
|
+ case "DL":
|
|
|
+ case "DD":
|
|
|
+ case "DT":
|
|
|
+ case "LI":
|
|
|
+ case "FORM":
|
|
|
+ node.readability.contentScore -= 3;
|
|
|
+ break;
|
|
|
+
|
|
|
+ case "H1":
|
|
|
+ case "H2":
|
|
|
+ case "H3":
|
|
|
+ case "H4":
|
|
|
+ case "H5":
|
|
|
+ case "H6":
|
|
|
+ case "TH":
|
|
|
+ node.readability.contentScore -= 5;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+
|
|
|
+ node.readability.contentScore += this._getClassWeight(node);
|
|
|
+ },
|
|
|
+
|
|
|
+ _removeAndGetNext: function(node) {
|
|
|
+ var nextNode = this._getNextNode(node, true);
|
|
|
+ node.parentNode.removeChild(node);
|
|
|
+ return nextNode;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Traverse the DOM from node to node, starting at the node passed in.
|
|
|
+ * Pass true for the second parameter to indicate this node itself
|
|
|
+ * (and its kids) are going away, and we want the next node over.
|
|
|
+ *
|
|
|
+ * Calling this in a loop will traverse the DOM depth-first.
|
|
|
+ */
|
|
|
+ _getNextNode: function(node, ignoreSelfAndKids) {
|
|
|
+ // First check for kids if those aren't being ignored
|
|
|
+ if (!ignoreSelfAndKids && node.firstElementChild) {
|
|
|
+ return node.firstElementChild;
|
|
|
+ }
|
|
|
+ // Then for siblings...
|
|
|
+ if (node.nextElementSibling) {
|
|
|
+ return node.nextElementSibling;
|
|
|
+ }
|
|
|
+ // And finally, move up the parent chain *and* find a sibling
|
|
|
+ // (because this is depth-first traversal, we will have already
|
|
|
+ // seen the parent nodes themselves).
|
|
|
+ do {
|
|
|
+ node = node.parentNode;
|
|
|
+ } while (node && !node.nextElementSibling);
|
|
|
+ return node && node.nextElementSibling;
|
|
|
+ },
|
|
|
+
|
|
|
+ _checkByline: function(node, matchString) {
|
|
|
+ if (this._articleByline) {
|
|
|
return false;
|
|
|
- },
|
|
|
-
|
|
|
- _getNodeAncestors: function(node, maxDepth) {
|
|
|
- maxDepth = maxDepth || 0;
|
|
|
- var i = 0, ancestors = [];
|
|
|
- while (node.parentNode) {
|
|
|
- ancestors.push(node.parentNode);
|
|
|
- if (maxDepth && ++i === maxDepth)
|
|
|
- break;
|
|
|
- node = node.parentNode;
|
|
|
- }
|
|
|
- return ancestors;
|
|
|
- },
|
|
|
-
|
|
|
- /***
|
|
|
- * grabArticle - Using a variety of metrics (content score, classname, element types), find the content that is
|
|
|
- * most likely to be the stuff a user wants to read. Then return it wrapped up in a div.
|
|
|
- *
|
|
|
- * @param page a document to run upon. Needs to be a full document, complete with body.
|
|
|
- * @return Element
|
|
|
- **/
|
|
|
- _grabArticle: function (page) {
|
|
|
- this.log("**** grabArticle ****");
|
|
|
- var doc = this._doc;
|
|
|
- var isPaging = (page !== null ? true: false);
|
|
|
- page = page ? page : this._doc.body;
|
|
|
-
|
|
|
- // We can't grab an article if we don't have a page!
|
|
|
- if (!page) {
|
|
|
- this.log("No body found in document. Abort.");
|
|
|
- return null;
|
|
|
- }
|
|
|
-
|
|
|
- var pageCacheHtml = page.innerHTML;
|
|
|
-
|
|
|
- while (true) {
|
|
|
- var stripUnlikelyCandidates = this._flagIsActive(this.FLAG_STRIP_UNLIKELYS);
|
|
|
-
|
|
|
- // First, node prepping. Trash nodes that look cruddy (like ones with the
|
|
|
- // class name "comment", etc), and turn divs into P tags where they have been
|
|
|
- // used inappropriately (as in, where they contain no other block level elements.)
|
|
|
- var elementsToScore = [];
|
|
|
- var node = this._doc.documentElement;
|
|
|
-
|
|
|
- while (node) {
|
|
|
- var matchString = node.className + " " + node.id;
|
|
|
-
|
|
|
- if (!this._isProbablyVisible(node)) {
|
|
|
- this.log("Removing hidden node - " + matchString);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (node.getAttribute !== undefined) {
|
|
|
+ var rel = node.getAttribute("rel");
|
|
|
+ var itemprop = node.getAttribute("itemprop");
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((rel === "author" || (itemprop && itemprop.indexOf("author") !== -1) || this.REGEXPS.byline.test(matchString)) && this._isValidByline(node.textContent)) {
|
|
|
+ this._articleByline = node.textContent.trim();
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ return false;
|
|
|
+ },
|
|
|
+
|
|
|
+ _getNodeAncestors: function(node, maxDepth) {
|
|
|
+ maxDepth = maxDepth || 0;
|
|
|
+ var i = 0, ancestors = [];
|
|
|
+ while (node.parentNode) {
|
|
|
+ ancestors.push(node.parentNode);
|
|
|
+ if (maxDepth && ++i === maxDepth)
|
|
|
+ break;
|
|
|
+ node = node.parentNode;
|
|
|
+ }
|
|
|
+ return ancestors;
|
|
|
+ },
|
|
|
+
|
|
|
+ /***
|
|
|
+ * grabArticle - Using a variety of metrics (content score, classname, element types), find the content that is
|
|
|
+ * most likely to be the stuff a user wants to read. Then return it wrapped up in a div.
|
|
|
+ *
|
|
|
+ * @param page a document to run upon. Needs to be a full document, complete with body.
|
|
|
+ * @return Element
|
|
|
+ **/
|
|
|
+ _grabArticle: function (page) {
|
|
|
+ this.log("**** grabArticle ****");
|
|
|
+ var doc = this._doc;
|
|
|
+ var isPaging = (page !== null ? true: false);
|
|
|
+ page = page ? page : this._doc.body;
|
|
|
+
|
|
|
+ // We can't grab an article if we don't have a page!
|
|
|
+ if (!page) {
|
|
|
+ this.log("No body found in document. Abort.");
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ var pageCacheHtml = page.innerHTML;
|
|
|
+
|
|
|
+ while (true) {
|
|
|
+ var stripUnlikelyCandidates = this._flagIsActive(this.FLAG_STRIP_UNLIKELYS);
|
|
|
+
|
|
|
+ // First, node prepping. Trash nodes that look cruddy (like ones with the
|
|
|
+ // class name "comment", etc), and turn divs into P tags where they have been
|
|
|
+ // used inappropriately (as in, where they contain no other block level elements.)
|
|
|
+ var elementsToScore = [];
|
|
|
+ var node = this._doc.documentElement;
|
|
|
+
|
|
|
+ while (node) {
|
|
|
+ var matchString = node.className + " " + node.id;
|
|
|
+
|
|
|
+ if (!this._isProbablyVisible(node)) {
|
|
|
+ this.log("Removing hidden node - " + matchString);
|
|
|
+ node = this._removeAndGetNext(node);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Check to see if this node is a byline, and remove it if it is.
|
|
|
+ if (this._checkByline(node, matchString)) {
|
|
|
+ node = this._removeAndGetNext(node);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Remove unlikely candidates
|
|
|
+ if (stripUnlikelyCandidates) {
|
|
|
+ if (this.REGEXPS.unlikelyCandidates.test(matchString) &&
|
|
|
+ !this.REGEXPS.okMaybeItsACandidate.test(matchString) &&
|
|
|
+ !this._hasAncestorTag(node, "table") &&
|
|
|
+ node.tagName !== "BODY" &&
|
|
|
+ node.tagName !== "A") {
|
|
|
+ this.log("Removing unlikely candidate - " + matchString);
|
|
|
node = this._removeAndGetNext(node);
|
|
|
continue;
|
|
|
}
|
|
|
-
|
|
|
- // Check to see if this node is a byline, and remove it if it is.
|
|
|
- if (this._checkByline(node, matchString)) {
|
|
|
+
|
|
|
+ if (node.getAttribute("role") == "complementary") {
|
|
|
+ this.log("Removing complementary content - " + matchString);
|
|
|
node = this._removeAndGetNext(node);
|
|
|
continue;
|
|
|
}
|
|
|
-
|
|
|
- // Remove unlikely candidates
|
|
|
- if (stripUnlikelyCandidates) {
|
|
|
- if (this.REGEXPS.unlikelyCandidates.test(matchString) &&
|
|
|
- !this.REGEXPS.okMaybeItsACandidate.test(matchString) &&
|
|
|
- !this._hasAncestorTag(node, "table") &&
|
|
|
- node.tagName !== "BODY" &&
|
|
|
- node.tagName !== "A") {
|
|
|
- this.log("Removing unlikely candidate - " + matchString);
|
|
|
- node = this._removeAndGetNext(node);
|
|
|
- continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Remove DIV, SECTION, and HEADER nodes without any content(e.g. text, image, video, or iframe).
|
|
|
+ if ((node.tagName === "DIV" || node.tagName === "SECTION" || node.tagName === "HEADER" ||
|
|
|
+ node.tagName === "H1" || node.tagName === "H2" || node.tagName === "H3" ||
|
|
|
+ node.tagName === "H4" || node.tagName === "H5" || node.tagName === "H6") &&
|
|
|
+ this._isElementWithoutContent(node)) {
|
|
|
+ node = this._removeAndGetNext(node);
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (this.DEFAULT_TAGS_TO_SCORE.indexOf(node.tagName) !== -1) {
|
|
|
+ elementsToScore.push(node);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Turn all divs that don't have children block level elements into p's
|
|
|
+ if (node.tagName === "DIV") {
|
|
|
+ // Put phrasing content into paragraphs.
|
|
|
+ var p = null;
|
|
|
+ var childNode = node.firstChild;
|
|
|
+ while (childNode) {
|
|
|
+ var nextSibling = childNode.nextSibling;
|
|
|
+ if (this._isPhrasingContent(childNode)) {
|
|
|
+ if (p !== null) {
|
|
|
+ p.appendChild(childNode);
|
|
|
+ } else if (!this._isWhitespace(childNode)) {
|
|
|
+ p = doc.createElement("p");
|
|
|
+ node.replaceChild(p, childNode);
|
|
|
+ p.appendChild(childNode);
|
|
|
+ }
|
|
|
+ } else if (p !== null) {
|
|
|
+ while (p.lastChild && this._isWhitespace(p.lastChild)) {
|
|
|
+ p.removeChild(p.lastChild);
|
|
|
+ }
|
|
|
+ p = null;
|
|
|
}
|
|
|
+ childNode = nextSibling;
|
|
|
}
|
|
|
-
|
|
|
- // Remove DIV, SECTION, and HEADER nodes without any content(e.g. text, image, video, or iframe).
|
|
|
- if ((node.tagName === "DIV" || node.tagName === "SECTION" || node.tagName === "HEADER" ||
|
|
|
- node.tagName === "H1" || node.tagName === "H2" || node.tagName === "H3" ||
|
|
|
- node.tagName === "H4" || node.tagName === "H5" || node.tagName === "H6") &&
|
|
|
- this._isElementWithoutContent(node)) {
|
|
|
- node = this._removeAndGetNext(node);
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- if (this.DEFAULT_TAGS_TO_SCORE.indexOf(node.tagName) !== -1) {
|
|
|
+
|
|
|
+ // Sites like http://mobile.slate.com encloses each paragraph with a DIV
|
|
|
+ // element. DIVs with only a P element inside and no text content can be
|
|
|
+ // safely converted into plain P elements to avoid confusing the scoring
|
|
|
+ // algorithm with DIVs with are, in practice, paragraphs.
|
|
|
+ if (this._hasSingleTagInsideElement(node, "P") && this._getLinkDensity(node) < 0.25) {
|
|
|
+ var newNode = node.children[0];
|
|
|
+ node.parentNode.replaceChild(newNode, node);
|
|
|
+ node = newNode;
|
|
|
+ elementsToScore.push(node);
|
|
|
+ } else if (!this._hasChildBlockElement(node)) {
|
|
|
+ node = this._setNodeTag(node, "P");
|
|
|
elementsToScore.push(node);
|
|
|
}
|
|
|
-
|
|
|
- // Turn all divs that don't have children block level elements into p's
|
|
|
- if (node.tagName === "DIV") {
|
|
|
- // Put phrasing content into paragraphs.
|
|
|
- var p = null;
|
|
|
- var childNode = node.firstChild;
|
|
|
- while (childNode) {
|
|
|
- var nextSibling = childNode.nextSibling;
|
|
|
- if (this._isPhrasingContent(childNode)) {
|
|
|
- if (p !== null) {
|
|
|
- p.appendChild(childNode);
|
|
|
- } else if (!this._isWhitespace(childNode)) {
|
|
|
- p = doc.createElement("p");
|
|
|
- node.replaceChild(p, childNode);
|
|
|
- p.appendChild(childNode);
|
|
|
- }
|
|
|
- } else if (p !== null) {
|
|
|
- while (p.lastChild && this._isWhitespace(p.lastChild)) {
|
|
|
- p.removeChild(p.lastChild);
|
|
|
- }
|
|
|
- p = null;
|
|
|
- }
|
|
|
- childNode = nextSibling;
|
|
|
- }
|
|
|
-
|
|
|
- // Sites like http://mobile.slate.com encloses each paragraph with a DIV
|
|
|
- // element. DIVs with only a P element inside and no text content can be
|
|
|
- // safely converted into plain P elements to avoid confusing the scoring
|
|
|
- // algorithm with DIVs with are, in practice, paragraphs.
|
|
|
- if (this._hasSingleTagInsideElement(node, "P") && this._getLinkDensity(node) < 0.25) {
|
|
|
- var newNode = node.children[0];
|
|
|
- node.parentNode.replaceChild(newNode, node);
|
|
|
- node = newNode;
|
|
|
- elementsToScore.push(node);
|
|
|
- } else if (!this._hasChildBlockElement(node)) {
|
|
|
- node = this._setNodeTag(node, "P");
|
|
|
- elementsToScore.push(node);
|
|
|
- }
|
|
|
- }
|
|
|
- node = this._getNextNode(node);
|
|
|
}
|
|
|
-
|
|
|
- /**
|
|
|
- * Loop through all paragraphs, and assign a score to them based on how content-y they look.
|
|
|
- * Then add their score to their parent node.
|
|
|
- *
|
|
|
- * A score is determined by things like number of commas, class names, etc. Maybe eventually link density.
|
|
|
- **/
|
|
|
- var candidates = [];
|
|
|
- this._forEachNode(elementsToScore, function(elementToScore) {
|
|
|
- if (!elementToScore.parentNode || typeof(elementToScore.parentNode.tagName) === "undefined")
|
|
|
- return;
|
|
|
-
|
|
|
- // If this paragraph is less than 25 characters, don't even count it.
|
|
|
- var innerText = this._getInnerText(elementToScore);
|
|
|
- if (innerText.length < 25)
|
|
|
- return;
|
|
|
-
|
|
|
- // Exclude nodes with no ancestor.
|
|
|
- var ancestors = this._getNodeAncestors(elementToScore, 3);
|
|
|
- if (ancestors.length === 0)
|
|
|
+ node = this._getNextNode(node);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Loop through all paragraphs, and assign a score to them based on how content-y they look.
|
|
|
+ * Then add their score to their parent node.
|
|
|
+ *
|
|
|
+ * A score is determined by things like number of commas, class names, etc. Maybe eventually link density.
|
|
|
+ **/
|
|
|
+ var candidates = [];
|
|
|
+ this._forEachNode(elementsToScore, function(elementToScore) {
|
|
|
+ if (!elementToScore.parentNode || typeof(elementToScore.parentNode.tagName) === "undefined")
|
|
|
+ return;
|
|
|
+
|
|
|
+ // If this paragraph is less than 25 characters, don't even count it.
|
|
|
+ var innerText = this._getInnerText(elementToScore);
|
|
|
+ if (innerText.length < 25)
|
|
|
+ return;
|
|
|
+
|
|
|
+ // Exclude nodes with no ancestor.
|
|
|
+ var ancestors = this._getNodeAncestors(elementToScore, 3);
|
|
|
+ if (ancestors.length === 0)
|
|
|
+ return;
|
|
|
+
|
|
|
+ var contentScore = 0;
|
|
|
+
|
|
|
+ // Add a point for the paragraph itself as a base.
|
|
|
+ contentScore += 1;
|
|
|
+
|
|
|
+ // Add points for any commas within this paragraph.
|
|
|
+ contentScore += innerText.split(",").length;
|
|
|
+
|
|
|
+ // For every 100 characters in this paragraph, add another point. Up to 3 points.
|
|
|
+ contentScore += Math.min(Math.floor(innerText.length / 100), 3);
|
|
|
+
|
|
|
+ // Initialize and score ancestors.
|
|
|
+ this._forEachNode(ancestors, function(ancestor, level) {
|
|
|
+ if (!ancestor.tagName || !ancestor.parentNode || typeof(ancestor.parentNode.tagName) === "undefined")
|
|
|
return;
|
|
|
-
|
|
|
- var contentScore = 0;
|
|
|
-
|
|
|
- // Add a point for the paragraph itself as a base.
|
|
|
- contentScore += 1;
|
|
|
-
|
|
|
- // Add points for any commas within this paragraph.
|
|
|
- contentScore += innerText.split(",").length;
|
|
|
-
|
|
|
- // For every 100 characters in this paragraph, add another point. Up to 3 points.
|
|
|
- contentScore += Math.min(Math.floor(innerText.length / 100), 3);
|
|
|
-
|
|
|
- // Initialize and score ancestors.
|
|
|
- this._forEachNode(ancestors, function(ancestor, level) {
|
|
|
- if (!ancestor.tagName || !ancestor.parentNode || typeof(ancestor.parentNode.tagName) === "undefined")
|
|
|
- return;
|
|
|
-
|
|
|
- if (typeof(ancestor.readability) === "undefined") {
|
|
|
- this._initializeNode(ancestor);
|
|
|
- candidates.push(ancestor);
|
|
|
- }
|
|
|
-
|
|
|
- // Node score divider:
|
|
|
- // - parent: 1 (no division)
|
|
|
- // - grandparent: 2
|
|
|
- // - great grandparent+: ancestor level * 3
|
|
|
- if (level === 0)
|
|
|
- var scoreDivider = 1;
|
|
|
- else if (level === 1)
|
|
|
- scoreDivider = 2;
|
|
|
- else
|
|
|
- scoreDivider = level * 3;
|
|
|
- ancestor.readability.contentScore += contentScore / scoreDivider;
|
|
|
- });
|
|
|
+
|
|
|
+ if (typeof(ancestor.readability) === "undefined") {
|
|
|
+ this._initializeNode(ancestor);
|
|
|
+ candidates.push(ancestor);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Node score divider:
|
|
|
+ // - parent: 1 (no division)
|
|
|
+ // - grandparent: 2
|
|
|
+ // - great grandparent+: ancestor level * 3
|
|
|
+ if (level === 0)
|
|
|
+ var scoreDivider = 1;
|
|
|
+ else if (level === 1)
|
|
|
+ scoreDivider = 2;
|
|
|
+ else
|
|
|
+ scoreDivider = level * 3;
|
|
|
+ ancestor.readability.contentScore += contentScore / scoreDivider;
|
|
|
});
|
|
|
-
|
|
|
- // After we've calculated scores, loop through all of the possible
|
|
|
- // candidate nodes we found and find the one with the highest score.
|
|
|
- var topCandidates = [];
|
|
|
- for (var c = 0, cl = candidates.length; c < cl; c += 1) {
|
|
|
- var candidate = candidates[c];
|
|
|
-
|
|
|
- // Scale the final candidates score based on link density. Good content
|
|
|
- // should have a relatively small link density (5% or less) and be mostly
|
|
|
- // unaffected by this operation.
|
|
|
- var candidateScore = candidate.readability.contentScore * (1 - this._getLinkDensity(candidate));
|
|
|
- candidate.readability.contentScore = candidateScore;
|
|
|
-
|
|
|
- this.log("Candidate:", candidate, "with score " + candidateScore);
|
|
|
-
|
|
|
- for (var t = 0; t < this._nbTopCandidates; t++) {
|
|
|
- var aTopCandidate = topCandidates[t];
|
|
|
-
|
|
|
- if (!aTopCandidate || candidateScore > aTopCandidate.readability.contentScore) {
|
|
|
- topCandidates.splice(t, 0, candidate);
|
|
|
- if (topCandidates.length > this._nbTopCandidates)
|
|
|
- topCandidates.pop();
|
|
|
- break;
|
|
|
- }
|
|
|
+ });
|
|
|
+
|
|
|
+ // After we've calculated scores, loop through all of the possible
|
|
|
+ // candidate nodes we found and find the one with the highest score.
|
|
|
+ var topCandidates = [];
|
|
|
+ for (var c = 0, cl = candidates.length; c < cl; c += 1) {
|
|
|
+ var candidate = candidates[c];
|
|
|
+
|
|
|
+ // Scale the final candidates score based on link density. Good content
|
|
|
+ // should have a relatively small link density (5% or less) and be mostly
|
|
|
+ // unaffected by this operation.
|
|
|
+ var candidateScore = candidate.readability.contentScore * (1 - this._getLinkDensity(candidate));
|
|
|
+ candidate.readability.contentScore = candidateScore;
|
|
|
+
|
|
|
+ this.log("Candidate:", candidate, "with score " + candidateScore);
|
|
|
+
|
|
|
+ for (var t = 0; t < this._nbTopCandidates; t++) {
|
|
|
+ var aTopCandidate = topCandidates[t];
|
|
|
+
|
|
|
+ if (!aTopCandidate || candidateScore > aTopCandidate.readability.contentScore) {
|
|
|
+ topCandidates.splice(t, 0, candidate);
|
|
|
+ if (topCandidates.length > this._nbTopCandidates)
|
|
|
+ topCandidates.pop();
|
|
|
+ break;
|
|
|
}
|
|
|
}
|
|
|
-
|
|
|
- var topCandidate = topCandidates[0] || null;
|
|
|
- var neededToCreateTopCandidate = false;
|
|
|
- var parentOfTopCandidate;
|
|
|
-
|
|
|
- // If we still have no top candidate, just use the body as a last resort.
|
|
|
- // We also have to copy the body node so it is something we can modify.
|
|
|
- if (topCandidate === null || topCandidate.tagName === "BODY") {
|
|
|
- // Move all of the page's children into topCandidate
|
|
|
- topCandidate = doc.createElement("DIV");
|
|
|
- neededToCreateTopCandidate = true;
|
|
|
- // Move everything (not just elements, also text nodes etc.) into the container
|
|
|
- // so we even include text directly in the body:
|
|
|
- var kids = page.childNodes;
|
|
|
- while (kids.length) {
|
|
|
- this.log("Moving child out:", kids[0]);
|
|
|
- topCandidate.appendChild(kids[0]);
|
|
|
- }
|
|
|
-
|
|
|
- page.appendChild(topCandidate);
|
|
|
-
|
|
|
- this._initializeNode(topCandidate);
|
|
|
- } else if (topCandidate) {
|
|
|
- // Find a better top candidate node if it contains (at least three) nodes which belong to `topCandidates` array
|
|
|
- // and whose scores are quite closed with current `topCandidate` node.
|
|
|
- var alternativeCandidateAncestors = [];
|
|
|
- for (var i = 1; i < topCandidates.length; i++) {
|
|
|
- if (topCandidates[i].readability.contentScore / topCandidate.readability.contentScore >= 0.75) {
|
|
|
- alternativeCandidateAncestors.push(this._getNodeAncestors(topCandidates[i]));
|
|
|
- }
|
|
|
- }
|
|
|
- var MINIMUM_TOPCANDIDATES = 3;
|
|
|
- if (alternativeCandidateAncestors.length >= MINIMUM_TOPCANDIDATES) {
|
|
|
- parentOfTopCandidate = topCandidate.parentNode;
|
|
|
- while (parentOfTopCandidate.tagName !== "BODY") {
|
|
|
- var listsContainingThisAncestor = 0;
|
|
|
- for (var ancestorIndex = 0; ancestorIndex < alternativeCandidateAncestors.length && listsContainingThisAncestor < MINIMUM_TOPCANDIDATES; ancestorIndex++) {
|
|
|
- listsContainingThisAncestor += Number(alternativeCandidateAncestors[ancestorIndex].includes(parentOfTopCandidate));
|
|
|
- }
|
|
|
- if (listsContainingThisAncestor >= MINIMUM_TOPCANDIDATES) {
|
|
|
- topCandidate = parentOfTopCandidate;
|
|
|
- break;
|
|
|
- }
|
|
|
- parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|
|
- }
|
|
|
- }
|
|
|
- if (!topCandidate.readability) {
|
|
|
- this._initializeNode(topCandidate);
|
|
|
+ }
|
|
|
+
|
|
|
+ var topCandidate = topCandidates[0] || null;
|
|
|
+ var neededToCreateTopCandidate = false;
|
|
|
+ var parentOfTopCandidate;
|
|
|
+
|
|
|
+ // If we still have no top candidate, just use the body as a last resort.
|
|
|
+ // We also have to copy the body node so it is something we can modify.
|
|
|
+ if (topCandidate === null || topCandidate.tagName === "BODY") {
|
|
|
+ // Move all of the page's children into topCandidate
|
|
|
+ topCandidate = doc.createElement("DIV");
|
|
|
+ neededToCreateTopCandidate = true;
|
|
|
+ // Move everything (not just elements, also text nodes etc.) into the container
|
|
|
+ // so we even include text directly in the body:
|
|
|
+ var kids = page.childNodes;
|
|
|
+ while (kids.length) {
|
|
|
+ this.log("Moving child out:", kids[0]);
|
|
|
+ topCandidate.appendChild(kids[0]);
|
|
|
+ }
|
|
|
+
|
|
|
+ page.appendChild(topCandidate);
|
|
|
+
|
|
|
+ this._initializeNode(topCandidate);
|
|
|
+ } else if (topCandidate) {
|
|
|
+ // Find a better top candidate node if it contains (at least three) nodes which belong to `topCandidates` array
|
|
|
+ // and whose scores are quite closed with current `topCandidate` node.
|
|
|
+ var alternativeCandidateAncestors = [];
|
|
|
+ for (var i = 1; i < topCandidates.length; i++) {
|
|
|
+ if (topCandidates[i].readability.contentScore / topCandidate.readability.contentScore >= 0.75) {
|
|
|
+ alternativeCandidateAncestors.push(this._getNodeAncestors(topCandidates[i]));
|
|
|
}
|
|
|
-
|
|
|
- // Because of our bonus system, parents of candidates might have scores
|
|
|
- // themselves. They get half of the node. There won't be nodes with higher
|
|
|
- // scores than our topCandidate, but if we see the score going *up* in the first
|
|
|
- // few steps up the tree, that's a decent sign that there might be more content
|
|
|
- // lurking in other places that we want to unify in. The sibling stuff
|
|
|
- // below does some of that - but only if we've looked high enough up the DOM
|
|
|
- // tree.
|
|
|
+ }
|
|
|
+ var MINIMUM_TOPCANDIDATES = 3;
|
|
|
+ if (alternativeCandidateAncestors.length >= MINIMUM_TOPCANDIDATES) {
|
|
|
parentOfTopCandidate = topCandidate.parentNode;
|
|
|
- var lastScore = topCandidate.readability.contentScore;
|
|
|
- // The scores shouldn't get too low.
|
|
|
- var scoreThreshold = lastScore / 3;
|
|
|
while (parentOfTopCandidate.tagName !== "BODY") {
|
|
|
- if (!parentOfTopCandidate.readability) {
|
|
|
- parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|
|
- continue;
|
|
|
+ var listsContainingThisAncestor = 0;
|
|
|
+ for (var ancestorIndex = 0; ancestorIndex < alternativeCandidateAncestors.length && listsContainingThisAncestor < MINIMUM_TOPCANDIDATES; ancestorIndex++) {
|
|
|
+ listsContainingThisAncestor += Number(alternativeCandidateAncestors[ancestorIndex].includes(parentOfTopCandidate));
|
|
|
}
|
|
|
- var parentScore = parentOfTopCandidate.readability.contentScore;
|
|
|
- if (parentScore < scoreThreshold)
|
|
|
- break;
|
|
|
- if (parentScore > lastScore) {
|
|
|
- // Alright! We found a better parent to use.
|
|
|
+ if (listsContainingThisAncestor >= MINIMUM_TOPCANDIDATES) {
|
|
|
topCandidate = parentOfTopCandidate;
|
|
|
break;
|
|
|
}
|
|
|
- lastScore = parentOfTopCandidate.readability.contentScore;
|
|
|
parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|
|
}
|
|
|
-
|
|
|
- // If the top candidate is the only child, use parent instead. This will help sibling
|
|
|
- // joining logic when adjacent content is actually located in parent's sibling node.
|
|
|
- parentOfTopCandidate = topCandidate.parentNode;
|
|
|
- while (parentOfTopCandidate.tagName != "BODY" && parentOfTopCandidate.children.length == 1) {
|
|
|
- topCandidate = parentOfTopCandidate;
|
|
|
- parentOfTopCandidate = topCandidate.parentNode;
|
|
|
- }
|
|
|
- if (!topCandidate.readability) {
|
|
|
- this._initializeNode(topCandidate);
|
|
|
+ }
|
|
|
+ if (!topCandidate.readability) {
|
|
|
+ this._initializeNode(topCandidate);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Because of our bonus system, parents of candidates might have scores
|
|
|
+ // themselves. They get half of the node. There won't be nodes with higher
|
|
|
+ // scores than our topCandidate, but if we see the score going *up* in the first
|
|
|
+ // few steps up the tree, that's a decent sign that there might be more content
|
|
|
+ // lurking in other places that we want to unify in. The sibling stuff
|
|
|
+ // below does some of that - but only if we've looked high enough up the DOM
|
|
|
+ // tree.
|
|
|
+ parentOfTopCandidate = topCandidate.parentNode;
|
|
|
+ var lastScore = topCandidate.readability.contentScore;
|
|
|
+ // The scores shouldn't get too low.
|
|
|
+ var scoreThreshold = lastScore / 3;
|
|
|
+ while (parentOfTopCandidate.tagName !== "BODY") {
|
|
|
+ if (!parentOfTopCandidate.readability) {
|
|
|
+ parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+ var parentScore = parentOfTopCandidate.readability.contentScore;
|
|
|
+ if (parentScore < scoreThreshold)
|
|
|
+ break;
|
|
|
+ if (parentScore > lastScore) {
|
|
|
+ // Alright! We found a better parent to use.
|
|
|
+ topCandidate = parentOfTopCandidate;
|
|
|
+ break;
|
|
|
}
|
|
|
+ lastScore = parentOfTopCandidate.readability.contentScore;
|
|
|
+ parentOfTopCandidate = parentOfTopCandidate.parentNode;
|
|
|
}
|
|
|
-
|
|
|
- // Now that we have the top candidate, look through its siblings for content
|
|
|
- // that might also be related. Things like preambles, content split by ads
|
|
|
- // that we removed, etc.
|
|
|
- var articleContent = doc.createElement("DIV");
|
|
|
- if (isPaging)
|
|
|
- articleContent.id = "readability-content";
|
|
|
-
|
|
|
- var siblingScoreThreshold = Math.max(10, topCandidate.readability.contentScore * 0.2);
|
|
|
- // Keep potential top candidate's parent node to try to get text direction of it later.
|
|
|
+
|
|
|
+ // If the top candidate is the only child, use parent instead. This will help sibling
|
|
|
+ // joining logic when adjacent content is actually located in parent's sibling node.
|
|
|
parentOfTopCandidate = topCandidate.parentNode;
|
|
|
- var siblings = parentOfTopCandidate.children;
|
|
|
-
|
|
|
- for (var s = 0, sl = siblings.length; s < sl; s++) {
|
|
|
- var sibling = siblings[s];
|
|
|
- var append = false;
|
|
|
-
|
|
|
- this.log("Looking at sibling node:", sibling, sibling.readability ? ("with score " + sibling.readability.contentScore) : "");
|
|
|
- this.log("Sibling has score", sibling.readability ? sibling.readability.contentScore : "Unknown");
|
|
|
-
|
|
|
- if (sibling === topCandidate) {
|
|
|
+ while (parentOfTopCandidate.tagName != "BODY" && parentOfTopCandidate.children.length == 1) {
|
|
|
+ topCandidate = parentOfTopCandidate;
|
|
|
+ parentOfTopCandidate = topCandidate.parentNode;
|
|
|
+ }
|
|
|
+ if (!topCandidate.readability) {
|
|
|
+ this._initializeNode(topCandidate);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Now that we have the top candidate, look through its siblings for content
|
|
|
+ // that might also be related. Things like preambles, content split by ads
|
|
|
+ // that we removed, etc.
|
|
|
+ var articleContent = doc.createElement("DIV");
|
|
|
+ if (isPaging)
|
|
|
+ articleContent.id = "readability-content";
|
|
|
+
|
|
|
+ var siblingScoreThreshold = Math.max(10, topCandidate.readability.contentScore * 0.2);
|
|
|
+ // Keep potential top candidate's parent node to try to get text direction of it later.
|
|
|
+ parentOfTopCandidate = topCandidate.parentNode;
|
|
|
+ var siblings = parentOfTopCandidate.children;
|
|
|
+
|
|
|
+ for (var s = 0, sl = siblings.length; s < sl; s++) {
|
|
|
+ var sibling = siblings[s];
|
|
|
+ var append = false;
|
|
|
+
|
|
|
+ this.log("Looking at sibling node:", sibling, sibling.readability ? ("with score " + sibling.readability.contentScore) : "");
|
|
|
+ this.log("Sibling has score", sibling.readability ? sibling.readability.contentScore : "Unknown");
|
|
|
+
|
|
|
+ if (sibling === topCandidate) {
|
|
|
+ append = true;
|
|
|
+ } else {
|
|
|
+ var contentBonus = 0;
|
|
|
+
|
|
|
+ // Give a bonus if sibling nodes and top candidates have the example same classname
|
|
|
+ if (sibling.className === topCandidate.className && topCandidate.className !== "")
|
|
|
+ contentBonus += topCandidate.readability.contentScore * 0.2;
|
|
|
+
|
|
|
+ if (sibling.readability &&
|
|
|
+ ((sibling.readability.contentScore + contentBonus) >= siblingScoreThreshold)) {
|
|
|
append = true;
|
|
|
- } else {
|
|
|
- var contentBonus = 0;
|
|
|
-
|
|
|
- // Give a bonus if sibling nodes and top candidates have the example same classname
|
|
|
- if (sibling.className === topCandidate.className && topCandidate.className !== "")
|
|
|
- contentBonus += topCandidate.readability.contentScore * 0.2;
|
|
|
-
|
|
|
- if (sibling.readability &&
|
|
|
- ((sibling.readability.contentScore + contentBonus) >= siblingScoreThreshold)) {
|
|
|
+ } else if (sibling.nodeName === "P") {
|
|
|
+ var linkDensity = this._getLinkDensity(sibling);
|
|
|
+ var nodeContent = this._getInnerText(sibling);
|
|
|
+ var nodeLength = nodeContent.length;
|
|
|
+
|
|
|
+ if (nodeLength > 80 && linkDensity < 0.25) {
|
|
|
+ append = true;
|
|
|
+ } else if (nodeLength < 80 && nodeLength > 0 && linkDensity === 0 &&
|
|
|
+ nodeContent.search(/\.( |$)/) !== -1) {
|
|
|
append = true;
|
|
|
- } else if (sibling.nodeName === "P") {
|
|
|
- var linkDensity = this._getLinkDensity(sibling);
|
|
|
- var nodeContent = this._getInnerText(sibling);
|
|
|
- var nodeLength = nodeContent.length;
|
|
|
-
|
|
|
- if (nodeLength > 80 && linkDensity < 0.25) {
|
|
|
- append = true;
|
|
|
- } else if (nodeLength < 80 && nodeLength > 0 && linkDensity === 0 &&
|
|
|
- nodeContent.search(/\.( |$)/) !== -1) {
|
|
|
- append = true;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- if (append) {
|
|
|
- this.log("Appending node:", sibling);
|
|
|
-
|
|
|
- if (this.ALTER_TO_DIV_EXCEPTIONS.indexOf(sibling.nodeName) === -1) {
|
|
|
- // We have a node that isn't a common block level element, like a form or td tag.
|
|
|
- // Turn it into a div so it doesn't get filtered out later by accident.
|
|
|
- this.log("Altering sibling:", sibling, "to div.");
|
|
|
-
|
|
|
- sibling = this._setNodeTag(sibling, "DIV");
|
|
|
}
|
|
|
-
|
|
|
- articleContent.appendChild(sibling);
|
|
|
- // siblings is a reference to the children array, and
|
|
|
- // sibling is removed from the array when we call appendChild().
|
|
|
- // As a result, we must revisit this index since the nodes
|
|
|
- // have been shifted.
|
|
|
- s -= 1;
|
|
|
- sl -= 1;
|
|
|
}
|
|
|
}
|
|
|
-
|
|
|
- if (this._debug)
|
|
|
- this.log("Article content pre-prep: " + articleContent.innerHTML);
|
|
|
- // So we have all of the content that we need. Now we clean it up for presentation.
|
|
|
- this._prepArticle(articleContent);
|
|
|
- if (this._debug)
|
|
|
- this.log("Article content post-prep: " + articleContent.innerHTML);
|
|
|
-
|
|
|
- if (neededToCreateTopCandidate) {
|
|
|
- // We already created a fake div thing, and there wouldn't have been any siblings left
|
|
|
- // for the previous loop, so there's no point trying to create a new div, and then
|
|
|
- // move all the children over. Just assign IDs and class names here. No need to append
|
|
|
- // because that already happened anyway.
|
|
|
- topCandidate.id = "readability-page-1";
|
|
|
- topCandidate.className = "page";
|
|
|
- } else {
|
|
|
- var div = doc.createElement("DIV");
|
|
|
- div.id = "readability-page-1";
|
|
|
- div.className = "page";
|
|
|
- var children = articleContent.childNodes;
|
|
|
- while (children.length) {
|
|
|
- div.appendChild(children[0]);
|
|
|
+
|
|
|
+ if (append) {
|
|
|
+ this.log("Appending node:", sibling);
|
|
|
+
|
|
|
+ if (this.ALTER_TO_DIV_EXCEPTIONS.indexOf(sibling.nodeName) === -1) {
|
|
|
+ // We have a node that isn't a common block level element, like a form or td tag.
|
|
|
+ // Turn it into a div so it doesn't get filtered out later by accident.
|
|
|
+ this.log("Altering sibling:", sibling, "to div.");
|
|
|
+
|
|
|
+ sibling = this._setNodeTag(sibling, "DIV");
|
|
|
}
|
|
|
- articleContent.appendChild(div);
|
|
|
+
|
|
|
+ articleContent.appendChild(sibling);
|
|
|
+ // siblings is a reference to the children array, and
|
|
|
+ // sibling is removed from the array when we call appendChild().
|
|
|
+ // As a result, we must revisit this index since the nodes
|
|
|
+ // have been shifted.
|
|
|
+ s -= 1;
|
|
|
+ sl -= 1;
|
|
|
}
|
|
|
-
|
|
|
- if (this._debug)
|
|
|
- this.log("Article content after paging: " + articleContent.innerHTML);
|
|
|
-
|
|
|
- var parseSuccessful = true;
|
|
|
-
|
|
|
- // Now that we've gone through the full algorithm, check to see if
|
|
|
- // we got any meaningful content. If we didn't, we may need to re-run
|
|
|
- // grabArticle with different flags set. This gives us a higher likelihood of
|
|
|
- // finding the content, and the sieve approach gives us a higher likelihood of
|
|
|
- // finding the -right- content.
|
|
|
- var textLength = this._getInnerText(articleContent, true).length;
|
|
|
- if (textLength < this._charThreshold) {
|
|
|
- parseSuccessful = false;
|
|
|
- page.innerHTML = pageCacheHtml;
|
|
|
-
|
|
|
- if (this._flagIsActive(this.FLAG_STRIP_UNLIKELYS)) {
|
|
|
- this._removeFlag(this.FLAG_STRIP_UNLIKELYS);
|
|
|
- this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
- } else if (this._flagIsActive(this.FLAG_WEIGHT_CLASSES)) {
|
|
|
- this._removeFlag(this.FLAG_WEIGHT_CLASSES);
|
|
|
- this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
- } else if (this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY)) {
|
|
|
- this._removeFlag(this.FLAG_CLEAN_CONDITIONALLY);
|
|
|
- this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
- } else {
|
|
|
- this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
- // No luck after removing flags, just return the longest text we found during the different loops
|
|
|
- this._attempts.sort(function (a, b) {
|
|
|
- return b.textLength - a.textLength;
|
|
|
- });
|
|
|
-
|
|
|
- // But first check if we actually have something
|
|
|
- if (!this._attempts[0].textLength) {
|
|
|
- return null;
|
|
|
- }
|
|
|
-
|
|
|
- articleContent = this._attempts[0].articleContent;
|
|
|
- parseSuccessful = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (this._debug)
|
|
|
+ this.log("Article content pre-prep: " + articleContent.innerHTML);
|
|
|
+ // So we have all of the content that we need. Now we clean it up for presentation.
|
|
|
+ this._prepArticle(articleContent);
|
|
|
+ if (this._debug)
|
|
|
+ this.log("Article content post-prep: " + articleContent.innerHTML);
|
|
|
+
|
|
|
+ if (neededToCreateTopCandidate) {
|
|
|
+ // We already created a fake div thing, and there wouldn't have been any siblings left
|
|
|
+ // for the previous loop, so there's no point trying to create a new div, and then
|
|
|
+ // move all the children over. Just assign IDs and class names here. No need to append
|
|
|
+ // because that already happened anyway.
|
|
|
+ topCandidate.id = "readability-page-1";
|
|
|
+ topCandidate.className = "page";
|
|
|
+ } else {
|
|
|
+ var div = doc.createElement("DIV");
|
|
|
+ div.id = "readability-page-1";
|
|
|
+ div.className = "page";
|
|
|
+ var children = articleContent.childNodes;
|
|
|
+ while (children.length) {
|
|
|
+ div.appendChild(children[0]);
|
|
|
+ }
|
|
|
+ articleContent.appendChild(div);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (this._debug)
|
|
|
+ this.log("Article content after paging: " + articleContent.innerHTML);
|
|
|
+
|
|
|
+ var parseSuccessful = true;
|
|
|
+
|
|
|
+ // Now that we've gone through the full algorithm, check to see if
|
|
|
+ // we got any meaningful content. If we didn't, we may need to re-run
|
|
|
+ // grabArticle with different flags set. This gives us a higher likelihood of
|
|
|
+ // finding the content, and the sieve approach gives us a higher likelihood of
|
|
|
+ // finding the -right- content.
|
|
|
+ var textLength = this._getInnerText(articleContent, true).length;
|
|
|
+ if (textLength < this._charThreshold) {
|
|
|
+ parseSuccessful = false;
|
|
|
+ page.innerHTML = pageCacheHtml;
|
|
|
+
|
|
|
+ if (this._flagIsActive(this.FLAG_STRIP_UNLIKELYS)) {
|
|
|
+ this._removeFlag(this.FLAG_STRIP_UNLIKELYS);
|
|
|
+ this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
+ } else if (this._flagIsActive(this.FLAG_WEIGHT_CLASSES)) {
|
|
|
+ this._removeFlag(this.FLAG_WEIGHT_CLASSES);
|
|
|
+ this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
+ } else if (this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY)) {
|
|
|
+ this._removeFlag(this.FLAG_CLEAN_CONDITIONALLY);
|
|
|
+ this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
+ } else {
|
|
|
+ this._attempts.push({articleContent: articleContent, textLength: textLength});
|
|
|
+ // No luck after removing flags, just return the longest text we found during the different loops
|
|
|
+ this._attempts.sort(function (a, b) {
|
|
|
+ return b.textLength - a.textLength;
|
|
|
+ });
|
|
|
+
|
|
|
+ // But first check if we actually have something
|
|
|
+ if (!this._attempts[0].textLength) {
|
|
|
+ return null;
|
|
|
}
|
|
|
+
|
|
|
+ articleContent = this._attempts[0].articleContent;
|
|
|
+ parseSuccessful = true;
|
|
|
}
|
|
|
-
|
|
|
- if (parseSuccessful) {
|
|
|
- // Find out text direction from ancestors of final top candidate.
|
|
|
- var ancestors = [parentOfTopCandidate, topCandidate].concat(this._getNodeAncestors(parentOfTopCandidate));
|
|
|
- this._someNode(ancestors, function(ancestor) {
|
|
|
- if (!ancestor.tagName)
|
|
|
- return false;
|
|
|
- var articleDir = ancestor.getAttribute("dir");
|
|
|
- if (articleDir) {
|
|
|
- this._articleDir = articleDir;
|
|
|
- return true;
|
|
|
- }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (parseSuccessful) {
|
|
|
+ // Find out text direction from ancestors of final top candidate.
|
|
|
+ var ancestors = [parentOfTopCandidate, topCandidate].concat(this._getNodeAncestors(parentOfTopCandidate));
|
|
|
+ this._someNode(ancestors, function(ancestor) {
|
|
|
+ if (!ancestor.tagName)
|
|
|
return false;
|
|
|
- });
|
|
|
- return articleContent;
|
|
|
+ var articleDir = ancestor.getAttribute("dir");
|
|
|
+ if (articleDir) {
|
|
|
+ this._articleDir = articleDir;
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+ return false;
|
|
|
+ });
|
|
|
+ return articleContent;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Check whether the input string could be a byline.
|
|
|
+ * This verifies that the input is a string, and that the length
|
|
|
+ * is less than 100 chars.
|
|
|
+ *
|
|
|
+ * @param possibleByline {string} - a string to check whether its a byline.
|
|
|
+ * @return Boolean - whether the input string is a byline.
|
|
|
+ */
|
|
|
+ _isValidByline: function(byline) {
|
|
|
+ if (typeof byline == "string" || byline instanceof String) {
|
|
|
+ byline = byline.trim();
|
|
|
+ return (byline.length > 0) && (byline.length < 100);
|
|
|
+ }
|
|
|
+ return false;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Attempts to get excerpt and byline metadata for the article.
|
|
|
+ *
|
|
|
+ * @return Object with optional "excerpt" and "byline" properties
|
|
|
+ */
|
|
|
+ _getArticleMetadata: function() {
|
|
|
+ var metadata = {};
|
|
|
+ var values = {};
|
|
|
+ var metaElements = this._doc.getElementsByTagName("meta");
|
|
|
+
|
|
|
+ // property is a space-separated list of values
|
|
|
+ var propertyPattern = /\s*(dc|dcterm|og|twitter)\s*:\s*(author|creator|description|title|site_name)\s*/gi;
|
|
|
+
|
|
|
+ // name is a single value
|
|
|
+ var namePattern = /^\s*(?:(dc|dcterm|og|twitter|weibo:(article|webpage))\s*[\.:]\s*)?(author|creator|description|title|site_name)\s*$/i;
|
|
|
+
|
|
|
+ // Find description tags.
|
|
|
+ this._forEachNode(metaElements, function(element) {
|
|
|
+ var elementName = element.getAttribute("name");
|
|
|
+ var elementProperty = element.getAttribute("property");
|
|
|
+ var content = element.getAttribute("content");
|
|
|
+ if (!content) {
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ var matches = null;
|
|
|
+ var name = null;
|
|
|
+
|
|
|
+ if (elementProperty) {
|
|
|
+ matches = elementProperty.match(propertyPattern);
|
|
|
+ if (matches) {
|
|
|
+ for (var i = matches.length - 1; i >= 0; i--) {
|
|
|
+ // Convert to lowercase, and remove any whitespace
|
|
|
+ // so we can match below.
|
|
|
+ name = matches[i].toLowerCase().replace(/\s/g, "");
|
|
|
+ // multiple authors
|
|
|
+ values[name] = content.trim();
|
|
|
+ }
|
|
|
}
|
|
|
}
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Check whether the input string could be a byline.
|
|
|
- * This verifies that the input is a string, and that the length
|
|
|
- * is less than 100 chars.
|
|
|
- *
|
|
|
- * @param possibleByline {string} - a string to check whether its a byline.
|
|
|
- * @return Boolean - whether the input string is a byline.
|
|
|
- */
|
|
|
- _isValidByline: function(byline) {
|
|
|
- if (typeof byline == "string" || byline instanceof String) {
|
|
|
- byline = byline.trim();
|
|
|
- return (byline.length > 0) && (byline.length < 100);
|
|
|
+ if (!matches && elementName && namePattern.test(elementName)) {
|
|
|
+ name = elementName;
|
|
|
+ if (content) {
|
|
|
+ // Convert to lowercase, remove any whitespace, and convert dots
|
|
|
+ // to colons so we can match below.
|
|
|
+ name = name.toLowerCase().replace(/\s/g, "").replace(/\./g, ":");
|
|
|
+ values[name] = content.trim();
|
|
|
+ }
|
|
|
}
|
|
|
+ });
|
|
|
+
|
|
|
+ // get title
|
|
|
+ metadata.title = values["dc:title"] ||
|
|
|
+ values["dcterm:title"] ||
|
|
|
+ values["og:title"] ||
|
|
|
+ values["weibo:article:title"] ||
|
|
|
+ values["weibo:webpage:title"] ||
|
|
|
+ values["title"] ||
|
|
|
+ values["twitter:title"];
|
|
|
+
|
|
|
+ if (!metadata.title) {
|
|
|
+ metadata.title = this._getArticleTitle();
|
|
|
+ }
|
|
|
+
|
|
|
+ // get author
|
|
|
+ metadata.byline = values["dc:creator"] ||
|
|
|
+ values["dcterm:creator"] ||
|
|
|
+ values["author"];
|
|
|
+
|
|
|
+ // get description
|
|
|
+ metadata.excerpt = values["dc:description"] ||
|
|
|
+ values["dcterm:description"] ||
|
|
|
+ values["og:description"] ||
|
|
|
+ values["weibo:article:description"] ||
|
|
|
+ values["weibo:webpage:description"] ||
|
|
|
+ values["description"] ||
|
|
|
+ values["twitter:description"];
|
|
|
+
|
|
|
+ // get site name
|
|
|
+ metadata.siteName = values["og:site_name"];
|
|
|
+
|
|
|
+ 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;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Attempts to get excerpt and byline metadata for the article.
|
|
|
- *
|
|
|
- * @return Object with optional "excerpt" and "byline" properties
|
|
|
- */
|
|
|
- _getArticleMetadata: function() {
|
|
|
- var metadata = {};
|
|
|
- var values = {};
|
|
|
- var metaElements = this._doc.getElementsByTagName("meta");
|
|
|
-
|
|
|
- // property is a space-separated list of values
|
|
|
- var propertyPattern = /\s*(dc|dcterm|og|twitter)\s*:\s*(author|creator|description|title|site_name)\s*/gi;
|
|
|
-
|
|
|
- // name is a single value
|
|
|
- var namePattern = /^\s*(?:(dc|dcterm|og|twitter|weibo:(article|webpage))\s*[\.:]\s*)?(author|creator|description|title|site_name)\s*$/i;
|
|
|
-
|
|
|
- // Find description tags.
|
|
|
- this._forEachNode(metaElements, function(element) {
|
|
|
- var elementName = element.getAttribute("name");
|
|
|
- var elementProperty = element.getAttribute("property");
|
|
|
- var content = element.getAttribute("content");
|
|
|
- if (!content) {
|
|
|
+ }
|
|
|
+
|
|
|
+ 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;
|
|
|
}
|
|
|
- var matches = null;
|
|
|
- var name = null;
|
|
|
-
|
|
|
- if (elementProperty) {
|
|
|
- matches = elementProperty.match(propertyPattern);
|
|
|
- if (matches) {
|
|
|
- for (var i = matches.length - 1; i >= 0; i--) {
|
|
|
- // Convert to lowercase, and remove any whitespace
|
|
|
- // so we can match below.
|
|
|
- name = matches[i].toLowerCase().replace(/\s/g, "");
|
|
|
- // multiple authors
|
|
|
- values[name] = content.trim();
|
|
|
+ }
|
|
|
+
|
|
|
+ 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);
|
|
|
}
|
|
|
}
|
|
|
- if (!matches && elementName && namePattern.test(elementName)) {
|
|
|
- name = elementName;
|
|
|
- if (content) {
|
|
|
- // Convert to lowercase, remove any whitespace, and convert dots
|
|
|
- // to colons so we can match below.
|
|
|
- name = name.toLowerCase().replace(/\s/g, "").replace(/\./g, ":");
|
|
|
- values[name] = content.trim();
|
|
|
+
|
|
|
+ noscript.parentNode.replaceChild(tmp.firstElementChild, prevElement);
|
|
|
+ }
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Removes script tags from the document.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ **/
|
|
|
+ _removeScripts: function(doc) {
|
|
|
+ this._removeNodes(this._getAllNodesWithTag(doc, ["script"]), function(scriptNode) {
|
|
|
+ scriptNode.nodeValue = "";
|
|
|
+ scriptNode.removeAttribute("src");
|
|
|
+ return true;
|
|
|
+ });
|
|
|
+ this._removeNodes(this._getAllNodesWithTag(doc, ["noscript"]));
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Check if this node has only whitespace and a single element with given tag
|
|
|
+ * Returns false if the DIV node contains non-empty text nodes
|
|
|
+ * or if it contains no element with given tag or more than 1 element.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @param string tag of child element
|
|
|
+ **/
|
|
|
+ _hasSingleTagInsideElement: function(element, tag) {
|
|
|
+ // There should be exactly 1 element child with given tag
|
|
|
+ if (element.children.length != 1 || element.children[0].tagName !== tag) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
+
|
|
|
+ // And there should be no text nodes with real content
|
|
|
+ return !this._someNode(element.childNodes, function(node) {
|
|
|
+ return node.nodeType === this.TEXT_NODE &&
|
|
|
+ this.REGEXPS.hasContent.test(node.textContent);
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ _isElementWithoutContent: function(node) {
|
|
|
+ return node.nodeType === this.ELEMENT_NODE &&
|
|
|
+ node.textContent.trim().length == 0 &&
|
|
|
+ (node.children.length == 0 ||
|
|
|
+ node.children.length == node.getElementsByTagName("br").length + node.getElementsByTagName("hr").length);
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Determine whether element has any children block level elements.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ */
|
|
|
+ _hasChildBlockElement: function (element) {
|
|
|
+ return this._someNode(element.childNodes, function(node) {
|
|
|
+ return this.DIV_TO_P_ELEMS.indexOf(node.tagName) !== -1 ||
|
|
|
+ this._hasChildBlockElement(node);
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /***
|
|
|
+ * Determine if a node qualifies as phrasing content.
|
|
|
+ * https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content
|
|
|
+ **/
|
|
|
+ _isPhrasingContent: function(node) {
|
|
|
+ return node.nodeType === this.TEXT_NODE || this.PHRASING_ELEMS.indexOf(node.tagName) !== -1 ||
|
|
|
+ ((node.tagName === "A" || node.tagName === "DEL" || node.tagName === "INS") &&
|
|
|
+ this._everyNode(node.childNodes, this._isPhrasingContent));
|
|
|
+ },
|
|
|
+
|
|
|
+ _isWhitespace: function(node) {
|
|
|
+ return (node.nodeType === this.TEXT_NODE && node.textContent.trim().length === 0) ||
|
|
|
+ (node.nodeType === this.ELEMENT_NODE && node.tagName === "BR");
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the inner text of a node - cross browser compatibly.
|
|
|
+ * This also strips out any excess whitespace to be found.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @param Boolean normalizeSpaces (default: true)
|
|
|
+ * @return string
|
|
|
+ **/
|
|
|
+ _getInnerText: function(e, normalizeSpaces) {
|
|
|
+ normalizeSpaces = (typeof normalizeSpaces === "undefined") ? true : normalizeSpaces;
|
|
|
+ var textContent = e.textContent.trim();
|
|
|
+
|
|
|
+ if (normalizeSpaces) {
|
|
|
+ return textContent.replace(this.REGEXPS.normalize, " ");
|
|
|
+ }
|
|
|
+ return textContent;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the number of times a string s appears in the node e.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @param string - what to split on. Default is ","
|
|
|
+ * @return number (integer)
|
|
|
+ **/
|
|
|
+ _getCharCount: function(e, s) {
|
|
|
+ s = s || ",";
|
|
|
+ return this._getInnerText(e).split(s).length - 1;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Remove the style attribute on every e and under.
|
|
|
+ * TODO: Test if getElementsByTagName(*) is faster.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _cleanStyles: function(e) {
|
|
|
+ if (!e || e.tagName.toLowerCase() === "svg")
|
|
|
+ return;
|
|
|
+
|
|
|
+ // Remove `style` and deprecated presentational attributes
|
|
|
+ for (var i = 0; i < this.PRESENTATIONAL_ATTRIBUTES.length; i++) {
|
|
|
+ e.removeAttribute(this.PRESENTATIONAL_ATTRIBUTES[i]);
|
|
|
+ }
|
|
|
+
|
|
|
+ if (this.DEPRECATED_SIZE_ATTRIBUTE_ELEMS.indexOf(e.tagName) !== -1) {
|
|
|
+ e.removeAttribute("width");
|
|
|
+ e.removeAttribute("height");
|
|
|
+ }
|
|
|
+
|
|
|
+ var cur = e.firstElementChild;
|
|
|
+ while (cur !== null) {
|
|
|
+ this._cleanStyles(cur);
|
|
|
+ cur = cur.nextElementSibling;
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get the density of links as a percentage of the content
|
|
|
+ * This is the amount of text that is inside a link divided by the total text in the node.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return number (float)
|
|
|
+ **/
|
|
|
+ _getLinkDensity: function(element) {
|
|
|
+ var textLength = this._getInnerText(element).length;
|
|
|
+ if (textLength === 0)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ var linkLength = 0;
|
|
|
+
|
|
|
+ // XXX implement _reduceNodeList?
|
|
|
+ this._forEachNode(element.getElementsByTagName("a"), function(linkNode) {
|
|
|
+ linkLength += this._getInnerText(linkNode).length;
|
|
|
+ });
|
|
|
+
|
|
|
+ return linkLength / textLength;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Get an elements class/id weight. Uses regular expressions to tell if this
|
|
|
+ * element looks good or bad.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return number (Integer)
|
|
|
+ **/
|
|
|
+ _getClassWeight: function(e) {
|
|
|
+ if (!this._flagIsActive(this.FLAG_WEIGHT_CLASSES))
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ var weight = 0;
|
|
|
+
|
|
|
+ // Look for a special classname
|
|
|
+ if (typeof(e.className) === "string" && e.className !== "") {
|
|
|
+ if (this.REGEXPS.negative.test(e.className))
|
|
|
+ weight -= 25;
|
|
|
+
|
|
|
+ if (this.REGEXPS.positive.test(e.className))
|
|
|
+ weight += 25;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Look for a special ID
|
|
|
+ if (typeof(e.id) === "string" && e.id !== "") {
|
|
|
+ if (this.REGEXPS.negative.test(e.id))
|
|
|
+ weight -= 25;
|
|
|
+
|
|
|
+ if (this.REGEXPS.positive.test(e.id))
|
|
|
+ weight += 25;
|
|
|
+ }
|
|
|
+
|
|
|
+ return weight;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Clean a node of all elements of type "tag".
|
|
|
+ * (Unless it's a youtube/vimeo video. People love movies.)
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @param string tag to clean
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _clean: function(e, tag) {
|
|
|
+ var isEmbed = ["object", "embed", "iframe"].indexOf(tag) !== -1;
|
|
|
+
|
|
|
+ this._removeNodes(this._getAllNodesWithTag(e, [tag]), function(element) {
|
|
|
+ // Allow youtube and vimeo videos through as people usually want to see those.
|
|
|
+ if (isEmbed) {
|
|
|
+ // First, check the elements attributes to see if any of them contain youtube or vimeo
|
|
|
+ for (var i = 0; i < element.attributes.length; i++) {
|
|
|
+ if (this.REGEXPS.videos.test(element.attributes[i].value)) {
|
|
|
+ return false;
|
|
|
}
|
|
|
}
|
|
|
- });
|
|
|
-
|
|
|
- // get title
|
|
|
- metadata.title = values["dc:title"] ||
|
|
|
- values["dcterm:title"] ||
|
|
|
- values["og:title"] ||
|
|
|
- values["weibo:article:title"] ||
|
|
|
- values["weibo:webpage:title"] ||
|
|
|
- values["title"] ||
|
|
|
- values["twitter:title"];
|
|
|
-
|
|
|
- if (!metadata.title) {
|
|
|
- metadata.title = this._getArticleTitle();
|
|
|
+
|
|
|
+ // For embed with <object> tag, check inner HTML as well.
|
|
|
+ if (element.tagName === "object" && this.REGEXPS.videos.test(element.innerHTML)) {
|
|
|
+ return false;
|
|
|
+ }
|
|
|
}
|
|
|
-
|
|
|
- // get author
|
|
|
- metadata.byline = values["dc:creator"] ||
|
|
|
- values["dcterm:creator"] ||
|
|
|
- values["author"];
|
|
|
-
|
|
|
- // get description
|
|
|
- metadata.excerpt = values["dc:description"] ||
|
|
|
- values["dcterm:description"] ||
|
|
|
- values["og:description"] ||
|
|
|
- values["weibo:article:description"] ||
|
|
|
- values["weibo:webpage:description"] ||
|
|
|
- values["description"] ||
|
|
|
- values["twitter:description"];
|
|
|
-
|
|
|
- // get site name
|
|
|
- metadata.siteName = values["og:site_name"];
|
|
|
-
|
|
|
- return metadata;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Removes script tags from the document.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- **/
|
|
|
- _removeScripts: function(doc) {
|
|
|
- this._removeNodes(doc.getElementsByTagName("script"), function(scriptNode) {
|
|
|
- scriptNode.nodeValue = "";
|
|
|
- scriptNode.removeAttribute("src");
|
|
|
- return true;
|
|
|
- });
|
|
|
- this._removeNodes(doc.getElementsByTagName("noscript"));
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Check if this node has only whitespace and a single element with given tag
|
|
|
- * Returns false if the DIV node contains non-empty text nodes
|
|
|
- * or if it contains no element with given tag or more than 1 element.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @param string tag of child element
|
|
|
- **/
|
|
|
- _hasSingleTagInsideElement: function(element, tag) {
|
|
|
- // There should be exactly 1 element child with given tag
|
|
|
- if (element.children.length != 1 || element.children[0].tagName !== tag) {
|
|
|
+
|
|
|
+ return true;
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Check if a given node has one of its ancestor tag name matching the
|
|
|
+ * provided one.
|
|
|
+ * @param HTMLElement node
|
|
|
+ * @param String tagName
|
|
|
+ * @param Number maxDepth
|
|
|
+ * @param Function filterFn a filter to invoke to determine whether this node 'counts'
|
|
|
+ * @return Boolean
|
|
|
+ */
|
|
|
+ _hasAncestorTag: function(node, tagName, maxDepth, filterFn) {
|
|
|
+ maxDepth = maxDepth || 3;
|
|
|
+ tagName = tagName.toUpperCase();
|
|
|
+ var depth = 0;
|
|
|
+ while (node.parentNode) {
|
|
|
+ if (maxDepth > 0 && depth > maxDepth)
|
|
|
return false;
|
|
|
+ if (node.parentNode.tagName === tagName && (!filterFn || filterFn(node.parentNode)))
|
|
|
+ return true;
|
|
|
+ node = node.parentNode;
|
|
|
+ depth++;
|
|
|
+ }
|
|
|
+ return false;
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Return an object indicating how many rows and columns this table has.
|
|
|
+ */
|
|
|
+ _getRowAndColumnCount: function(table) {
|
|
|
+ var rows = 0;
|
|
|
+ var columns = 0;
|
|
|
+ var trs = table.getElementsByTagName("tr");
|
|
|
+ for (var i = 0; i < trs.length; i++) {
|
|
|
+ var rowspan = trs[i].getAttribute("rowspan") || 0;
|
|
|
+ if (rowspan) {
|
|
|
+ rowspan = parseInt(rowspan, 10);
|
|
|
}
|
|
|
-
|
|
|
- // And there should be no text nodes with real content
|
|
|
- return !this._someNode(element.childNodes, function(node) {
|
|
|
- return node.nodeType === this.TEXT_NODE &&
|
|
|
- this.REGEXPS.hasContent.test(node.textContent);
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- _isElementWithoutContent: function(node) {
|
|
|
- return node.nodeType === this.ELEMENT_NODE &&
|
|
|
- node.textContent.trim().length == 0 &&
|
|
|
- (node.children.length == 0 ||
|
|
|
- node.children.length == node.getElementsByTagName("br").length + node.getElementsByTagName("hr").length);
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Determine whether element has any children block level elements.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- */
|
|
|
- _hasChildBlockElement: function (element) {
|
|
|
- return this._someNode(element.childNodes, function(node) {
|
|
|
- return this.DIV_TO_P_ELEMS.indexOf(node.tagName) !== -1 ||
|
|
|
- this._hasChildBlockElement(node);
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- /***
|
|
|
- * Determine if a node qualifies as phrasing content.
|
|
|
- * https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content
|
|
|
- **/
|
|
|
- _isPhrasingContent: function(node) {
|
|
|
- return node.nodeType === this.TEXT_NODE || this.PHRASING_ELEMS.indexOf(node.tagName) !== -1 ||
|
|
|
- ((node.tagName === "A" || node.tagName === "DEL" || node.tagName === "INS") &&
|
|
|
- this._everyNode(node.childNodes, this._isPhrasingContent));
|
|
|
- },
|
|
|
-
|
|
|
- _isWhitespace: function(node) {
|
|
|
- return (node.nodeType === this.TEXT_NODE && node.textContent.trim().length === 0) ||
|
|
|
- (node.nodeType === this.ELEMENT_NODE && node.tagName === "BR");
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Get the inner text of a node - cross browser compatibly.
|
|
|
- * This also strips out any excess whitespace to be found.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @param Boolean normalizeSpaces (default: true)
|
|
|
- * @return string
|
|
|
- **/
|
|
|
- _getInnerText: function(e, normalizeSpaces) {
|
|
|
- normalizeSpaces = (typeof normalizeSpaces === "undefined") ? true : normalizeSpaces;
|
|
|
- var textContent = e.textContent.trim();
|
|
|
-
|
|
|
- if (normalizeSpaces) {
|
|
|
- return textContent.replace(this.REGEXPS.normalize, " ");
|
|
|
+ rows += (rowspan || 1);
|
|
|
+
|
|
|
+ // Now look for column-related info
|
|
|
+ var columnsInThisRow = 0;
|
|
|
+ var cells = trs[i].getElementsByTagName("td");
|
|
|
+ for (var j = 0; j < cells.length; j++) {
|
|
|
+ var colspan = cells[j].getAttribute("colspan") || 0;
|
|
|
+ if (colspan) {
|
|
|
+ colspan = parseInt(colspan, 10);
|
|
|
+ }
|
|
|
+ columnsInThisRow += (colspan || 1);
|
|
|
}
|
|
|
- return textContent;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Get the number of times a string s appears in the node e.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @param string - what to split on. Default is ","
|
|
|
- * @return number (integer)
|
|
|
- **/
|
|
|
- _getCharCount: function(e, s) {
|
|
|
- s = s || ",";
|
|
|
- return this._getInnerText(e).split(s).length - 1;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Remove the style attribute on every e and under.
|
|
|
- * TODO: Test if getElementsByTagName(*) is faster.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _cleanStyles: function(e) {
|
|
|
- if (!e || e.tagName.toLowerCase() === "svg")
|
|
|
- return;
|
|
|
-
|
|
|
- // Remove `style` and deprecated presentational attributes
|
|
|
- for (var i = 0; i < this.PRESENTATIONAL_ATTRIBUTES.length; i++) {
|
|
|
- e.removeAttribute(this.PRESENTATIONAL_ATTRIBUTES[i]);
|
|
|
+ columns = Math.max(columns, columnsInThisRow);
|
|
|
+ }
|
|
|
+ return {rows: rows, columns: columns};
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Look for 'data' (as opposed to 'layout') tables, for which we use
|
|
|
+ * similar checks as
|
|
|
+ * https://dxr.mozilla.org/mozilla-central/rev/71224049c0b52ab190564d3ea0eab089a159a4cf/accessible/html/HTMLTableAccessible.cpp#920
|
|
|
+ */
|
|
|
+ _markDataTables: function(root) {
|
|
|
+ var tables = root.getElementsByTagName("table");
|
|
|
+ for (var i = 0; i < tables.length; i++) {
|
|
|
+ var table = tables[i];
|
|
|
+ var role = table.getAttribute("role");
|
|
|
+ if (role == "presentation") {
|
|
|
+ table._readabilityDataTable = false;
|
|
|
+ continue;
|
|
|
}
|
|
|
-
|
|
|
- if (this.DEPRECATED_SIZE_ATTRIBUTE_ELEMS.indexOf(e.tagName) !== -1) {
|
|
|
- e.removeAttribute("width");
|
|
|
- e.removeAttribute("height");
|
|
|
+ var datatable = table.getAttribute("datatable");
|
|
|
+ if (datatable == "0") {
|
|
|
+ table._readabilityDataTable = false;
|
|
|
+ continue;
|
|
|
}
|
|
|
-
|
|
|
- var cur = e.firstElementChild;
|
|
|
- while (cur !== null) {
|
|
|
- this._cleanStyles(cur);
|
|
|
- cur = cur.nextElementSibling;
|
|
|
+ var summary = table.getAttribute("summary");
|
|
|
+ if (summary) {
|
|
|
+ table._readabilityDataTable = true;
|
|
|
+ continue;
|
|
|
}
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Get the density of links as a percentage of the content
|
|
|
- * This is the amount of text that is inside a link divided by the total text in the node.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return number (float)
|
|
|
- **/
|
|
|
- _getLinkDensity: function(element) {
|
|
|
- var textLength = this._getInnerText(element).length;
|
|
|
- if (textLength === 0)
|
|
|
- return 0;
|
|
|
-
|
|
|
- var linkLength = 0;
|
|
|
-
|
|
|
- // XXX implement _reduceNodeList?
|
|
|
- this._forEachNode(element.getElementsByTagName("a"), function(linkNode) {
|
|
|
- linkLength += this._getInnerText(linkNode).length;
|
|
|
- });
|
|
|
-
|
|
|
- return linkLength / textLength;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Get an elements class/id weight. Uses regular expressions to tell if this
|
|
|
- * element looks good or bad.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @return number (Integer)
|
|
|
- **/
|
|
|
- _getClassWeight: function(e) {
|
|
|
- if (!this._flagIsActive(this.FLAG_WEIGHT_CLASSES))
|
|
|
- return 0;
|
|
|
-
|
|
|
- var weight = 0;
|
|
|
-
|
|
|
- // Look for a special classname
|
|
|
- if (typeof(e.className) === "string" && e.className !== "") {
|
|
|
- if (this.REGEXPS.negative.test(e.className))
|
|
|
- weight -= 25;
|
|
|
-
|
|
|
- if (this.REGEXPS.positive.test(e.className))
|
|
|
- weight += 25;
|
|
|
+
|
|
|
+ var caption = table.getElementsByTagName("caption")[0];
|
|
|
+ if (caption && caption.childNodes.length > 0) {
|
|
|
+ table._readabilityDataTable = true;
|
|
|
+ continue;
|
|
|
}
|
|
|
-
|
|
|
- // Look for a special ID
|
|
|
- if (typeof(e.id) === "string" && e.id !== "") {
|
|
|
- if (this.REGEXPS.negative.test(e.id))
|
|
|
- weight -= 25;
|
|
|
-
|
|
|
- if (this.REGEXPS.positive.test(e.id))
|
|
|
- weight += 25;
|
|
|
+
|
|
|
+ // If the table has a descendant with any of these tags, consider a data table:
|
|
|
+ var dataTableDescendants = ["col", "colgroup", "tfoot", "thead", "th"];
|
|
|
+ var descendantExists = function(tag) {
|
|
|
+ return !!table.getElementsByTagName(tag)[0];
|
|
|
+ };
|
|
|
+ if (dataTableDescendants.some(descendantExists)) {
|
|
|
+ this.log("Data table because found data-y descendant");
|
|
|
+ table._readabilityDataTable = true;
|
|
|
+ continue;
|
|
|
}
|
|
|
-
|
|
|
- return weight;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Clean a node of all elements of type "tag".
|
|
|
- * (Unless it's a youtube/vimeo video. People love movies.)
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @param string tag to clean
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _clean: function(e, tag) {
|
|
|
- var isEmbed = ["object", "embed", "iframe"].indexOf(tag) !== -1;
|
|
|
-
|
|
|
- this._removeNodes(e.getElementsByTagName(tag), function(element) {
|
|
|
- // Allow youtube and vimeo videos through as people usually want to see those.
|
|
|
- if (isEmbed) {
|
|
|
- // First, check the elements attributes to see if any of them contain youtube or vimeo
|
|
|
- for (var i = 0; i < element.attributes.length; i++) {
|
|
|
- if (this.REGEXPS.videos.test(element.attributes[i].value)) {
|
|
|
- return false;
|
|
|
- }
|
|
|
+
|
|
|
+ // Nested tables indicate a layout table:
|
|
|
+ if (table.getElementsByTagName("table")[0]) {
|
|
|
+ table._readabilityDataTable = false;
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+
|
|
|
+ var sizeInfo = this._getRowAndColumnCount(table);
|
|
|
+ if (sizeInfo.rows >= 10 || sizeInfo.columns > 4) {
|
|
|
+ table._readabilityDataTable = true;
|
|
|
+ continue;
|
|
|
+ }
|
|
|
+ // Now just go by size entirely:
|
|
|
+ table._readabilityDataTable = sizeInfo.rows * sizeInfo.columns > 10;
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /* 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) {
|
|
|
+ // 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) {
|
|
|
+ for (var i = 0; i < elem.attributes.length; i++) {
|
|
|
+ var attr = elem.attributes[i];
|
|
|
+ if (attr.name === "src" || attr.name === "srcset") {
|
|
|
+ continue;
|
|
|
}
|
|
|
-
|
|
|
- // For embed with <object> tag, check inner HTML as well.
|
|
|
- if (element.tagName === "object" && this.REGEXPS.videos.test(element.innerHTML)) {
|
|
|
- return false;
|
|
|
+ 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";
|
|
|
}
|
|
|
- }
|
|
|
-
|
|
|
- return true;
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Check if a given node has one of its ancestor tag name matching the
|
|
|
- * provided one.
|
|
|
- * @param HTMLElement node
|
|
|
- * @param String tagName
|
|
|
- * @param Number maxDepth
|
|
|
- * @param Function filterFn a filter to invoke to determine whether this node 'counts'
|
|
|
- * @return Boolean
|
|
|
- */
|
|
|
- _hasAncestorTag: function(node, tagName, maxDepth, filterFn) {
|
|
|
- maxDepth = maxDepth || 3;
|
|
|
- tagName = tagName.toUpperCase();
|
|
|
- var depth = 0;
|
|
|
- while (node.parentNode) {
|
|
|
- if (maxDepth > 0 && depth > maxDepth)
|
|
|
- return false;
|
|
|
- if (node.parentNode.tagName === tagName && (!filterFn || filterFn(node.parentNode)))
|
|
|
- return true;
|
|
|
- node = node.parentNode;
|
|
|
- depth++;
|
|
|
- }
|
|
|
- return false;
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Return an object indicating how many rows and columns this table has.
|
|
|
- */
|
|
|
- _getRowAndColumnCount: function(table) {
|
|
|
- var rows = 0;
|
|
|
- var columns = 0;
|
|
|
- var trs = table.getElementsByTagName("tr");
|
|
|
- for (var i = 0; i < trs.length; i++) {
|
|
|
- var rowspan = trs[i].getAttribute("rowspan") || 0;
|
|
|
- if (rowspan) {
|
|
|
- rowspan = parseInt(rowspan, 10);
|
|
|
- }
|
|
|
- rows += (rowspan || 1);
|
|
|
-
|
|
|
- // Now look for column-related info
|
|
|
- var columnsInThisRow = 0;
|
|
|
- var cells = trs[i].getElementsByTagName("td");
|
|
|
- for (var j = 0; j < cells.length; j++) {
|
|
|
- var colspan = cells[j].getAttribute("colspan") || 0;
|
|
|
- if (colspan) {
|
|
|
- colspan = parseInt(colspan, 10);
|
|
|
+ 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);
|
|
|
+ }
|
|
|
}
|
|
|
- columnsInThisRow += (colspan || 1);
|
|
|
}
|
|
|
- columns = Math.max(columns, columnsInThisRow);
|
|
|
}
|
|
|
- return {rows: rows, columns: columns};
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Look for 'data' (as opposed to 'layout') tables, for which we use
|
|
|
- * similar checks as
|
|
|
- * https://dxr.mozilla.org/mozilla-central/rev/71224049c0b52ab190564d3ea0eab089a159a4cf/accessible/html/HTMLTableAccessible.cpp#920
|
|
|
- */
|
|
|
- _markDataTables: function(root) {
|
|
|
- var tables = root.getElementsByTagName("table");
|
|
|
- for (var i = 0; i < tables.length; i++) {
|
|
|
- var table = tables[i];
|
|
|
- var role = table.getAttribute("role");
|
|
|
- if (role == "presentation") {
|
|
|
- table._readabilityDataTable = false;
|
|
|
- continue;
|
|
|
- }
|
|
|
- var datatable = table.getAttribute("datatable");
|
|
|
- if (datatable == "0") {
|
|
|
- table._readabilityDataTable = false;
|
|
|
- continue;
|
|
|
- }
|
|
|
- var summary = table.getAttribute("summary");
|
|
|
- if (summary) {
|
|
|
- table._readabilityDataTable = true;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- var caption = table.getElementsByTagName("caption")[0];
|
|
|
- if (caption && caption.childNodes.length > 0) {
|
|
|
- table._readabilityDataTable = true;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- // If the table has a descendant with any of these tags, consider a data table:
|
|
|
- var dataTableDescendants = ["col", "colgroup", "tfoot", "thead", "th"];
|
|
|
- var descendantExists = function(tag) {
|
|
|
- return !!table.getElementsByTagName(tag)[0];
|
|
|
- };
|
|
|
- if (dataTableDescendants.some(descendantExists)) {
|
|
|
- this.log("Data table because found data-y descendant");
|
|
|
- table._readabilityDataTable = true;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- // Nested tables indicate a layout table:
|
|
|
- if (table.getElementsByTagName("table")[0]) {
|
|
|
- table._readabilityDataTable = false;
|
|
|
- continue;
|
|
|
- }
|
|
|
-
|
|
|
- var sizeInfo = this._getRowAndColumnCount(table);
|
|
|
- if (sizeInfo.rows >= 10 || sizeInfo.columns > 4) {
|
|
|
- table._readabilityDataTable = true;
|
|
|
- continue;
|
|
|
- }
|
|
|
- // Now just go by size entirely:
|
|
|
- table._readabilityDataTable = sizeInfo.rows * sizeInfo.columns > 10;
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * 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.
|
|
|
+ *
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _cleanConditionally: function(e, tag) {
|
|
|
+ if (!this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY))
|
|
|
+ return;
|
|
|
+
|
|
|
+ var isList = tag === "ul" || tag === "ol";
|
|
|
+
|
|
|
+ // Gather counts for other typical elements embedded within.
|
|
|
+ // Traverse backwards so we can remove nodes at the same time
|
|
|
+ // without effecting the traversal.
|
|
|
+ //
|
|
|
+ // TODO: Consider taking into account original contentScore here.
|
|
|
+ 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;
|
|
|
}
|
|
|
- },
|
|
|
-
|
|
|
- /* 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) {
|
|
|
- // 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) {
|
|
|
- for (var i = 0; i < elem.attributes.length; i++) {
|
|
|
- var attr = elem.attributes[i];
|
|
|
- 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.
|
|
|
- *
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _cleanConditionally: function(e, tag) {
|
|
|
- if (!this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY))
|
|
|
- return;
|
|
|
-
|
|
|
- var isList = tag === "ul" || tag === "ol";
|
|
|
-
|
|
|
- // Gather counts for other typical elements embedded within.
|
|
|
- // Traverse backwards so we can remove nodes at the same time
|
|
|
- // without effecting the traversal.
|
|
|
- //
|
|
|
- // TODO: Consider taking into account original contentScore here.
|
|
|
- this._removeNodes(e.getElementsByTagName(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;
|
|
|
- }
|
|
|
-
|
|
|
- var weight = this._getClassWeight(node);
|
|
|
- var contentScore = 0;
|
|
|
-
|
|
|
- this.log("Cleaning Conditionally", node);
|
|
|
-
|
|
|
- if (weight + contentScore < 0) {
|
|
|
- return true;
|
|
|
- }
|
|
|
-
|
|
|
- if (this._getCharCount(node, ",") < 10) {
|
|
|
- // If there are not very many commas, and the number of
|
|
|
- // non-paragraph elements is more than paragraphs or other
|
|
|
- // ominous signs, remove the element.
|
|
|
- var p = node.getElementsByTagName("p").length;
|
|
|
- var img = node.getElementsByTagName("img").length;
|
|
|
- var li = node.getElementsByTagName("li").length - 100;
|
|
|
- var input = node.getElementsByTagName("input").length;
|
|
|
-
|
|
|
- var embedCount = 0;
|
|
|
- var embeds = this._concatNodeLists(
|
|
|
- node.getElementsByTagName("object"),
|
|
|
- node.getElementsByTagName("embed"),
|
|
|
- node.getElementsByTagName("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)) {
|
|
|
+
|
|
|
+ // 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;
|
|
|
+ }
|
|
|
+
|
|
|
+ var weight = this._getClassWeight(node);
|
|
|
+ var contentScore = 0;
|
|
|
+
|
|
|
+ this.log("Cleaning Conditionally", node);
|
|
|
+
|
|
|
+ if (weight + contentScore < 0) {
|
|
|
+ return true;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (this._getCharCount(node, ",") < 10) {
|
|
|
+ // If there are not very many commas, and the number of
|
|
|
+ // non-paragraph elements is more than paragraphs or other
|
|
|
+ // ominous signs, remove the element.
|
|
|
+ var p = node.getElementsByTagName("p").length;
|
|
|
+ var img = node.getElementsByTagName("img").length;
|
|
|
+ var li = node.getElementsByTagName("li").length - 100;
|
|
|
+ var input = node.getElementsByTagName("input").length;
|
|
|
+
|
|
|
+ var embedCount = 0;
|
|
|
+ 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;
|
|
|
}
|
|
|
-
|
|
|
- embedCount++;
|
|
|
}
|
|
|
-
|
|
|
- var linkDensity = this._getLinkDensity(node);
|
|
|
- var contentLength = this._getInnerText(node).length;
|
|
|
-
|
|
|
- var haveToRemove =
|
|
|
- (img > 1 && p / img < 0.5 && !this._hasAncestorTag(node, "figure")) ||
|
|
|
- (!isList && li > p) ||
|
|
|
- (input > Math.floor(p/3)) ||
|
|
|
- (!isList && contentLength < 25 && (img === 0 || img > 2) && !this._hasAncestorTag(node, "figure")) ||
|
|
|
- (!isList && weight < 25 && linkDensity > 0.2) ||
|
|
|
- (weight >= 25 && linkDensity > 0.5) ||
|
|
|
- ((embedCount === 1 && contentLength < 75) || embedCount > 1);
|
|
|
- return haveToRemove;
|
|
|
- }
|
|
|
- return false;
|
|
|
- });
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Clean out elements that match the specified conditions
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @param Function determines whether a node should be removed
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- _cleanMatchedNodes: function(e, filter) {
|
|
|
- var endOfSearchMarkerNode = this._getNextNode(e, true);
|
|
|
- var next = this._getNextNode(e);
|
|
|
- while (next && next != endOfSearchMarkerNode) {
|
|
|
- if (filter.call(this, next, next.className + " " + next.id)) {
|
|
|
- next = this._removeAndGetNext(next);
|
|
|
- } else {
|
|
|
- next = this._getNextNode(next);
|
|
|
+
|
|
|
+ // 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);
|
|
|
+ var contentLength = this._getInnerText(node).length;
|
|
|
+
|
|
|
+ var haveToRemove =
|
|
|
+ (img > 1 && p / img < 0.5 && !this._hasAncestorTag(node, "figure")) ||
|
|
|
+ (!isList && li > p) ||
|
|
|
+ (input > Math.floor(p/3)) ||
|
|
|
+ (!isList && contentLength < 25 && (img === 0 || img > 2) && !this._hasAncestorTag(node, "figure")) ||
|
|
|
+ (!isList && weight < 25 && linkDensity > 0.2) ||
|
|
|
+ (weight >= 25 && linkDensity > 0.5) ||
|
|
|
+ ((embedCount === 1 && contentLength < 75) || embedCount > 1);
|
|
|
+ return haveToRemove;
|
|
|
}
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Clean out spurious headers from an Element. Checks things like classnames and link density.
|
|
|
- *
|
|
|
- * @param Element
|
|
|
- * @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;
|
|
|
- });
|
|
|
+ return false;
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Clean out elements that match the specified conditions
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @param Function determines whether a node should be removed
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _cleanMatchedNodes: function(e, filter) {
|
|
|
+ var endOfSearchMarkerNode = this._getNextNode(e, true);
|
|
|
+ var next = this._getNextNode(e);
|
|
|
+ while (next && next != endOfSearchMarkerNode) {
|
|
|
+ if (filter.call(this, next, next.className + " " + next.id)) {
|
|
|
+ next = this._removeAndGetNext(next);
|
|
|
+ } else {
|
|
|
+ next = this._getNextNode(next);
|
|
|
}
|
|
|
- },
|
|
|
-
|
|
|
- _flagIsActive: function(flag) {
|
|
|
- return (this._flags & flag) > 0;
|
|
|
- },
|
|
|
-
|
|
|
- _removeFlag: function(flag) {
|
|
|
- this._flags = this._flags & ~flag;
|
|
|
- },
|
|
|
-
|
|
|
- _isProbablyVisible: function(node) {
|
|
|
- return (!node.style || node.style.display != "none")
|
|
|
- && !node.hasAttribute("hidden")
|
|
|
- && (!node.hasAttribute("aria-hidden") || node.getAttribute("aria-hidden") != "true");
|
|
|
- },
|
|
|
-
|
|
|
- /**
|
|
|
- * Runs readability.
|
|
|
- *
|
|
|
- * Workflow:
|
|
|
- * 1. Prep the document by removing script tags, css, etc.
|
|
|
- * 2. Build readability's DOM tree.
|
|
|
- * 3. Grab the article content from the current dom tree.
|
|
|
- * 4. Replace the current DOM tree with the new one.
|
|
|
- * 5. Read peacefully.
|
|
|
- *
|
|
|
- * @return void
|
|
|
- **/
|
|
|
- parse: function () {
|
|
|
- // Avoid parsing too large documents, as per configuration option
|
|
|
- if (this._maxElemsToParse > 0) {
|
|
|
- var numTags = this._doc.getElementsByTagName("*").length;
|
|
|
- if (numTags > this._maxElemsToParse) {
|
|
|
- throw new Error("Aborting parsing document; " + numTags + " elements found");
|
|
|
- }
|
|
|
+ }
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Clean out spurious headers from an Element. Checks things like classnames and link density.
|
|
|
+ *
|
|
|
+ * @param Element
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ _cleanHeaders: function(e) {
|
|
|
+ this._removeNodes(this._getAllNodesWithTag(e, ["h1", "h2"]), function (header) {
|
|
|
+ return this._getClassWeight(header) < 0;
|
|
|
+ });
|
|
|
+ },
|
|
|
+
|
|
|
+ _flagIsActive: function(flag) {
|
|
|
+ return (this._flags & flag) > 0;
|
|
|
+ },
|
|
|
+
|
|
|
+ _removeFlag: function(flag) {
|
|
|
+ this._flags = this._flags & ~flag;
|
|
|
+ },
|
|
|
+
|
|
|
+ _isProbablyVisible: function(node) {
|
|
|
+ // 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));
|
|
|
+ },
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Runs readability.
|
|
|
+ *
|
|
|
+ * Workflow:
|
|
|
+ * 1. Prep the document by removing script tags, css, etc.
|
|
|
+ * 2. Build readability's DOM tree.
|
|
|
+ * 3. Grab the article content from the current dom tree.
|
|
|
+ * 4. Replace the current DOM tree with the new one.
|
|
|
+ * 5. Read peacefully.
|
|
|
+ *
|
|
|
+ * @return void
|
|
|
+ **/
|
|
|
+ parse: function () {
|
|
|
+ // Avoid parsing too large documents, as per configuration option
|
|
|
+ if (this._maxElemsToParse > 0) {
|
|
|
+ var numTags = this._doc.getElementsByTagName("*").length;
|
|
|
+ if (numTags > this._maxElemsToParse) {
|
|
|
+ throw new Error("Aborting parsing document; " + numTags + " elements found");
|
|
|
}
|
|
|
-
|
|
|
- // Remove script tags from the document.
|
|
|
- this._removeScripts(this._doc);
|
|
|
-
|
|
|
- this._prepDocument();
|
|
|
-
|
|
|
- var metadata = this._getArticleMetadata();
|
|
|
- this._articleTitle = metadata.title;
|
|
|
-
|
|
|
- var articleContent = this._grabArticle();
|
|
|
- if (!articleContent)
|
|
|
- return null;
|
|
|
-
|
|
|
- this.log("Grabbed: " + articleContent.innerHTML);
|
|
|
-
|
|
|
- this._postProcessContent(articleContent);
|
|
|
-
|
|
|
- // If we haven't found an excerpt in the article's metadata, use the article's
|
|
|
- // first paragraph as the excerpt. This is used for displaying a preview of
|
|
|
- // the article's content.
|
|
|
- if (!metadata.excerpt) {
|
|
|
- var paragraphs = articleContent.getElementsByTagName("p");
|
|
|
- if (paragraphs.length > 0) {
|
|
|
- metadata.excerpt = paragraphs[0].textContent.trim();
|
|
|
- }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Unwrap image from noscript
|
|
|
+ this._unwrapNoscriptImages(this._doc);
|
|
|
+
|
|
|
+ // Remove script tags from the document.
|
|
|
+ this._removeScripts(this._doc);
|
|
|
+
|
|
|
+ this._prepDocument();
|
|
|
+
|
|
|
+ var metadata = this._getArticleMetadata();
|
|
|
+ this._articleTitle = metadata.title;
|
|
|
+
|
|
|
+ var articleContent = this._grabArticle();
|
|
|
+ if (!articleContent)
|
|
|
+ return null;
|
|
|
+
|
|
|
+ this.log("Grabbed: " + articleContent.innerHTML);
|
|
|
+
|
|
|
+ this._postProcessContent(articleContent);
|
|
|
+
|
|
|
+ // If we haven't found an excerpt in the article's metadata, use the article's
|
|
|
+ // first paragraph as the excerpt. This is used for displaying a preview of
|
|
|
+ // the article's content.
|
|
|
+ if (!metadata.excerpt) {
|
|
|
+ var paragraphs = articleContent.getElementsByTagName("p");
|
|
|
+ if (paragraphs.length > 0) {
|
|
|
+ metadata.excerpt = paragraphs[0].textContent.trim();
|
|
|
}
|
|
|
-
|
|
|
- var textContent = articleContent.textContent;
|
|
|
- return {
|
|
|
- title: this._articleTitle,
|
|
|
- byline: metadata.byline || this._articleByline,
|
|
|
- dir: this._articleDir,
|
|
|
- content: articleContent.innerHTML,
|
|
|
- textContent: textContent,
|
|
|
- length: textContent.length,
|
|
|
- excerpt: metadata.excerpt,
|
|
|
- siteName: metadata.siteName || this._articleSiteName
|
|
|
- };
|
|
|
}
|
|
|
- };
|
|
|
-
|
|
|
- if (typeof module === "object") {
|
|
|
- module.exports = Readability;
|
|
|
+
|
|
|
+ var textContent = articleContent.textContent;
|
|
|
+ return {
|
|
|
+ title: this._articleTitle,
|
|
|
+ byline: metadata.byline || this._articleByline,
|
|
|
+ dir: this._articleDir,
|
|
|
+ content: articleContent.innerHTML,
|
|
|
+ textContent: textContent,
|
|
|
+ length: textContent.length,
|
|
|
+ excerpt: metadata.excerpt,
|
|
|
+ siteName: metadata.siteName || this._articleSiteName
|
|
|
+ };
|
|
|
}
|
|
|
-
|
|
|
+};
|
|
|
+
|
|
|
+if (typeof module === "object") {
|
|
|
+ module.exports = Readability;
|
|
|
+}
|
Gildas