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-rw-r--r--toolkit/components/reader/readability/JSDOMParser.js1197
-rw-r--r--toolkit/components/reader/readability/LICENSE.md13
-rw-r--r--toolkit/components/reader/readability/Readability-readerable.js108
-rw-r--r--toolkit/components/reader/readability/Readability.js2314
4 files changed, 3632 insertions, 0 deletions
diff --git a/toolkit/components/reader/readability/JSDOMParser.js b/toolkit/components/reader/readability/JSDOMParser.js
new file mode 100644
index 0000000000..7b6d241b43
--- /dev/null
+++ b/toolkit/components/reader/readability/JSDOMParser.js
@@ -0,0 +1,1197 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/**
+ * This is a relatively lightweight DOMParser that is safe to use in a web
+ * worker. This is far from a complete DOM implementation; however, it should
+ * contain the minimal set of functionality necessary for Readability.js.
+ *
+ * Aside from not implementing the full DOM API, there are other quirks to be
+ * aware of when using the JSDOMParser:
+ *
+ * 1) Properly formed HTML/XML must be used. This means you should be extra
+ * careful when using this parser on anything received directly from an
+ * XMLHttpRequest. Providing a serialized string from an XMLSerializer,
+ * however, should be safe (since the browser's XMLSerializer should
+ * generate valid HTML/XML). Therefore, if parsing a document from an XHR,
+ * the recommended approach is to do the XHR in the main thread, use
+ * XMLSerializer.serializeToString() on the responseXML, and pass the
+ * resulting string to the worker.
+ *
+ * 2) Live NodeLists are not supported. DOM methods and properties such as
+ * getElementsByTagName() and childNodes return standard arrays. If you
+ * want these lists to be updated when nodes are removed or added to the
+ * document, you must take care to manually update them yourself.
+ */
+(function (global) {
+
+ // XML only defines these and the numeric ones:
+
+ var entityTable = {
+ "lt": "<",
+ "gt": ">",
+ "amp": "&",
+ "quot": '"',
+ "apos": "'",
+ };
+
+ var reverseEntityTable = {
+ "<": "&lt;",
+ ">": "&gt;",
+ "&": "&amp;",
+ '"': "&quot;",
+ "'": "&apos;",
+ };
+
+ function encodeTextContentHTML(s) {
+ return s.replace(/[&<>]/g, function(x) {
+ return reverseEntityTable[x];
+ });
+ }
+
+ function encodeHTML(s) {
+ return s.replace(/[&<>'"]/g, function(x) {
+ return reverseEntityTable[x];
+ });
+ }
+
+ function decodeHTML(str) {
+ return str.replace(/&(quot|amp|apos|lt|gt);/g, function(match, tag) {
+ return entityTable[tag];
+ }).replace(/&#(?:x([0-9a-z]{1,4})|([0-9]{1,4}));/gi, function(match, hex, numStr) {
+ var num = parseInt(hex || numStr, hex ? 16 : 10); // read num
+ return String.fromCharCode(num);
+ });
+ }
+
+ // When a style is set in JS, map it to the corresponding CSS attribute
+ var styleMap = {
+ "alignmentBaseline": "alignment-baseline",
+ "background": "background",
+ "backgroundAttachment": "background-attachment",
+ "backgroundClip": "background-clip",
+ "backgroundColor": "background-color",
+ "backgroundImage": "background-image",
+ "backgroundOrigin": "background-origin",
+ "backgroundPosition": "background-position",
+ "backgroundPositionX": "background-position-x",
+ "backgroundPositionY": "background-position-y",
+ "backgroundRepeat": "background-repeat",
+ "backgroundRepeatX": "background-repeat-x",
+ "backgroundRepeatY": "background-repeat-y",
+ "backgroundSize": "background-size",
+ "baselineShift": "baseline-shift",
+ "border": "border",
+ "borderBottom": "border-bottom",
+ "borderBottomColor": "border-bottom-color",
+ "borderBottomLeftRadius": "border-bottom-left-radius",
+ "borderBottomRightRadius": "border-bottom-right-radius",
+ "borderBottomStyle": "border-bottom-style",
+ "borderBottomWidth": "border-bottom-width",
+ "borderCollapse": "border-collapse",
+ "borderColor": "border-color",
+ "borderImage": "border-image",
+ "borderImageOutset": "border-image-outset",
+ "borderImageRepeat": "border-image-repeat",
+ "borderImageSlice": "border-image-slice",
+ "borderImageSource": "border-image-source",
+ "borderImageWidth": "border-image-width",
+ "borderLeft": "border-left",
+ "borderLeftColor": "border-left-color",
+ "borderLeftStyle": "border-left-style",
+ "borderLeftWidth": "border-left-width",
+ "borderRadius": "border-radius",
+ "borderRight": "border-right",
+ "borderRightColor": "border-right-color",
+ "borderRightStyle": "border-right-style",
+ "borderRightWidth": "border-right-width",
+ "borderSpacing": "border-spacing",
+ "borderStyle": "border-style",
+ "borderTop": "border-top",
+ "borderTopColor": "border-top-color",
+ "borderTopLeftRadius": "border-top-left-radius",
+ "borderTopRightRadius": "border-top-right-radius",
+ "borderTopStyle": "border-top-style",
+ "borderTopWidth": "border-top-width",
+ "borderWidth": "border-width",
+ "bottom": "bottom",
+ "boxShadow": "box-shadow",
+ "boxSizing": "box-sizing",
+ "captionSide": "caption-side",
+ "clear": "clear",
+ "clip": "clip",
+ "clipPath": "clip-path",
+ "clipRule": "clip-rule",
+ "color": "color",
+ "colorInterpolation": "color-interpolation",
+ "colorInterpolationFilters": "color-interpolation-filters",
+ "colorProfile": "color-profile",
+ "colorRendering": "color-rendering",
+ "content": "content",
+ "counterIncrement": "counter-increment",
+ "counterReset": "counter-reset",
+ "cursor": "cursor",
+ "direction": "direction",
+ "display": "display",
+ "dominantBaseline": "dominant-baseline",
+ "emptyCells": "empty-cells",
+ "enableBackground": "enable-background",
+ "fill": "fill",
+ "fillOpacity": "fill-opacity",
+ "fillRule": "fill-rule",
+ "filter": "filter",
+ "cssFloat": "float",
+ "floodColor": "flood-color",
+ "floodOpacity": "flood-opacity",
+ "font": "font",
+ "fontFamily": "font-family",
+ "fontSize": "font-size",
+ "fontStretch": "font-stretch",
+ "fontStyle": "font-style",
+ "fontVariant": "font-variant",
+ "fontWeight": "font-weight",
+ "glyphOrientationHorizontal": "glyph-orientation-horizontal",
+ "glyphOrientationVertical": "glyph-orientation-vertical",
+ "height": "height",
+ "imageRendering": "image-rendering",
+ "kerning": "kerning",
+ "left": "left",
+ "letterSpacing": "letter-spacing",
+ "lightingColor": "lighting-color",
+ "lineHeight": "line-height",
+ "listStyle": "list-style",
+ "listStyleImage": "list-style-image",
+ "listStylePosition": "list-style-position",
+ "listStyleType": "list-style-type",
+ "margin": "margin",
+ "marginBottom": "margin-bottom",
+ "marginLeft": "margin-left",
+ "marginRight": "margin-right",
+ "marginTop": "margin-top",
+ "marker": "marker",
+ "markerEnd": "marker-end",
+ "markerMid": "marker-mid",
+ "markerStart": "marker-start",
+ "mask": "mask",
+ "maxHeight": "max-height",
+ "maxWidth": "max-width",
+ "minHeight": "min-height",
+ "minWidth": "min-width",
+ "opacity": "opacity",
+ "orphans": "orphans",
+ "outline": "outline",
+ "outlineColor": "outline-color",
+ "outlineOffset": "outline-offset",
+ "outlineStyle": "outline-style",
+ "outlineWidth": "outline-width",
+ "overflow": "overflow",
+ "overflowX": "overflow-x",
+ "overflowY": "overflow-y",
+ "padding": "padding",
+ "paddingBottom": "padding-bottom",
+ "paddingLeft": "padding-left",
+ "paddingRight": "padding-right",
+ "paddingTop": "padding-top",
+ "page": "page",
+ "pageBreakAfter": "page-break-after",
+ "pageBreakBefore": "page-break-before",
+ "pageBreakInside": "page-break-inside",
+ "pointerEvents": "pointer-events",
+ "position": "position",
+ "quotes": "quotes",
+ "resize": "resize",
+ "right": "right",
+ "shapeRendering": "shape-rendering",
+ "size": "size",
+ "speak": "speak",
+ "src": "src",
+ "stopColor": "stop-color",
+ "stopOpacity": "stop-opacity",
+ "stroke": "stroke",
+ "strokeDasharray": "stroke-dasharray",
+ "strokeDashoffset": "stroke-dashoffset",
+ "strokeLinecap": "stroke-linecap",
+ "strokeLinejoin": "stroke-linejoin",
+ "strokeMiterlimit": "stroke-miterlimit",
+ "strokeOpacity": "stroke-opacity",
+ "strokeWidth": "stroke-width",
+ "tableLayout": "table-layout",
+ "textAlign": "text-align",
+ "textAnchor": "text-anchor",
+ "textDecoration": "text-decoration",
+ "textIndent": "text-indent",
+ "textLineThrough": "text-line-through",
+ "textLineThroughColor": "text-line-through-color",
+ "textLineThroughMode": "text-line-through-mode",
+ "textLineThroughStyle": "text-line-through-style",
+ "textLineThroughWidth": "text-line-through-width",
+ "textOverflow": "text-overflow",
+ "textOverline": "text-overline",
+ "textOverlineColor": "text-overline-color",
+ "textOverlineMode": "text-overline-mode",
+ "textOverlineStyle": "text-overline-style",
+ "textOverlineWidth": "text-overline-width",
+ "textRendering": "text-rendering",
+ "textShadow": "text-shadow",
+ "textTransform": "text-transform",
+ "textUnderline": "text-underline",
+ "textUnderlineColor": "text-underline-color",
+ "textUnderlineMode": "text-underline-mode",
+ "textUnderlineStyle": "text-underline-style",
+ "textUnderlineWidth": "text-underline-width",
+ "top": "top",
+ "unicodeBidi": "unicode-bidi",
+ "unicodeRange": "unicode-range",
+ "vectorEffect": "vector-effect",
+ "verticalAlign": "vertical-align",
+ "visibility": "visibility",
+ "whiteSpace": "white-space",
+ "widows": "widows",
+ "width": "width",
+ "wordBreak": "word-break",
+ "wordSpacing": "word-spacing",
+ "wordWrap": "word-wrap",
+ "writingMode": "writing-mode",
+ "zIndex": "z-index",
+ "zoom": "zoom",
+ };
+
+ // Elements that can be self-closing
+ var voidElems = {
+ "area": true,
+ "base": true,
+ "br": true,
+ "col": true,
+ "command": true,
+ "embed": true,
+ "hr": true,
+ "img": true,
+ "input": true,
+ "link": true,
+ "meta": true,
+ "param": true,
+ "source": true,
+ "wbr": true
+ };
+
+ var whitespace = [" ", "\t", "\n", "\r"];
+
+ // See https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
+ var nodeTypes = {
+ ELEMENT_NODE: 1,
+ ATTRIBUTE_NODE: 2,
+ TEXT_NODE: 3,
+ CDATA_SECTION_NODE: 4,
+ ENTITY_REFERENCE_NODE: 5,
+ ENTITY_NODE: 6,
+ PROCESSING_INSTRUCTION_NODE: 7,
+ COMMENT_NODE: 8,
+ DOCUMENT_NODE: 9,
+ DOCUMENT_TYPE_NODE: 10,
+ DOCUMENT_FRAGMENT_NODE: 11,
+ NOTATION_NODE: 12
+ };
+
+ function getElementsByTagName(tag) {
+ tag = tag.toUpperCase();
+ var elems = [];
+ var allTags = (tag === "*");
+ function getElems(node) {
+ var length = node.children.length;
+ for (var i = 0; i < length; i++) {
+ var child = node.children[i];
+ if (allTags || (child.tagName === tag))
+ elems.push(child);
+ getElems(child);
+ }
+ }
+ getElems(this);
+ elems._isLiveNodeList = true;
+ return elems;
+ }
+
+ var Node = function () {};
+
+ Node.prototype = {
+ attributes: null,
+ childNodes: null,
+ localName: null,
+ nodeName: null,
+ parentNode: null,
+ textContent: null,
+ nextSibling: null,
+ previousSibling: null,
+
+ get firstChild() {
+ return this.childNodes[0] || null;
+ },
+
+ get firstElementChild() {
+ return this.children[0] || null;
+ },
+
+ get lastChild() {
+ return this.childNodes[this.childNodes.length - 1] || null;
+ },
+
+ get lastElementChild() {
+ return this.children[this.children.length - 1] || null;
+ },
+
+ appendChild: function (child) {
+ if (child.parentNode) {
+ child.parentNode.removeChild(child);
+ }
+
+ var last = this.lastChild;
+ if (last)
+ last.nextSibling = child;
+ child.previousSibling = last;
+
+ if (child.nodeType === Node.ELEMENT_NODE) {
+ child.previousElementSibling = this.children[this.children.length - 1] || null;
+ this.children.push(child);
+ child.previousElementSibling && (child.previousElementSibling.nextElementSibling = child);
+ }
+ this.childNodes.push(child);
+ child.parentNode = this;
+ },
+
+ removeChild: function (child) {
+ var childNodes = this.childNodes;
+ var childIndex = childNodes.indexOf(child);
+ if (childIndex === -1) {
+ throw "removeChild: node not found";
+ } else {
+ child.parentNode = null;
+ var prev = child.previousSibling;
+ var next = child.nextSibling;
+ if (prev)
+ prev.nextSibling = next;
+ if (next)
+ next.previousSibling = prev;
+
+ if (child.nodeType === Node.ELEMENT_NODE) {
+ prev = child.previousElementSibling;
+ next = child.nextElementSibling;
+ if (prev)
+ prev.nextElementSibling = next;
+ if (next)
+ next.previousElementSibling = prev;
+ this.children.splice(this.children.indexOf(child), 1);
+ }
+
+ child.previousSibling = child.nextSibling = null;
+ child.previousElementSibling = child.nextElementSibling = null;
+
+ return childNodes.splice(childIndex, 1)[0];
+ }
+ },
+
+ replaceChild: function (newNode, oldNode) {
+ var childNodes = this.childNodes;
+ var childIndex = childNodes.indexOf(oldNode);
+ if (childIndex === -1) {
+ throw "replaceChild: node not found";
+ } else {
+ // This will take care of updating the new node if it was somewhere else before:
+ if (newNode.parentNode)
+ newNode.parentNode.removeChild(newNode);
+
+ childNodes[childIndex] = newNode;
+
+ // update the new node's sibling properties, and its new siblings' sibling properties
+ newNode.nextSibling = oldNode.nextSibling;
+ newNode.previousSibling = oldNode.previousSibling;
+ if (newNode.nextSibling)
+ newNode.nextSibling.previousSibling = newNode;
+ if (newNode.previousSibling)
+ newNode.previousSibling.nextSibling = newNode;
+
+ newNode.parentNode = this;
+
+ // Now deal with elements before we clear out those values for the old node,
+ // because it can help us take shortcuts here:
+ if (newNode.nodeType === Node.ELEMENT_NODE) {
+ if (oldNode.nodeType === Node.ELEMENT_NODE) {
+ // Both were elements, which makes this easier, we just swap things out:
+ newNode.previousElementSibling = oldNode.previousElementSibling;
+ newNode.nextElementSibling = oldNode.nextElementSibling;
+ if (newNode.previousElementSibling)
+ newNode.previousElementSibling.nextElementSibling = newNode;
+ if (newNode.nextElementSibling)
+ newNode.nextElementSibling.previousElementSibling = newNode;
+ this.children[this.children.indexOf(oldNode)] = newNode;
+ } else {
+ // Hard way:
+ newNode.previousElementSibling = (function() {
+ for (var i = childIndex - 1; i >= 0; i--) {
+ if (childNodes[i].nodeType === Node.ELEMENT_NODE)
+ return childNodes[i];
+ }
+ return null;
+ })();
+ if (newNode.previousElementSibling) {
+ newNode.nextElementSibling = newNode.previousElementSibling.nextElementSibling;
+ } else {
+ newNode.nextElementSibling = (function() {
+ for (var i = childIndex + 1; i < childNodes.length; i++) {
+ if (childNodes[i].nodeType === Node.ELEMENT_NODE)
+ return childNodes[i];
+ }
+ return null;
+ })();
+ }
+ if (newNode.previousElementSibling)
+ newNode.previousElementSibling.nextElementSibling = newNode;
+ if (newNode.nextElementSibling)
+ newNode.nextElementSibling.previousElementSibling = newNode;
+
+ if (newNode.nextElementSibling)
+ this.children.splice(this.children.indexOf(newNode.nextElementSibling), 0, newNode);
+ else
+ this.children.push(newNode);
+ }
+ } else if (oldNode.nodeType === Node.ELEMENT_NODE) {
+ // new node is not an element node.
+ // if the old one was, update its element siblings:
+ if (oldNode.previousElementSibling)
+ oldNode.previousElementSibling.nextElementSibling = oldNode.nextElementSibling;
+ if (oldNode.nextElementSibling)
+ oldNode.nextElementSibling.previousElementSibling = oldNode.previousElementSibling;
+ this.children.splice(this.children.indexOf(oldNode), 1);
+
+ // If the old node wasn't an element, neither the new nor the old node was an element,
+ // and the children array and its members shouldn't need any updating.
+ }
+
+
+ oldNode.parentNode = null;
+ oldNode.previousSibling = null;
+ oldNode.nextSibling = null;
+ if (oldNode.nodeType === Node.ELEMENT_NODE) {
+ oldNode.previousElementSibling = null;
+ oldNode.nextElementSibling = null;
+ }
+ return oldNode;
+ }
+ },
+
+ __JSDOMParser__: true,
+ };
+
+ for (var nodeType in nodeTypes) {
+ Node[nodeType] = Node.prototype[nodeType] = nodeTypes[nodeType];
+ }
+
+ var Attribute = function (name, value) {
+ this.name = name;
+ this._value = value;
+ };
+
+ Attribute.prototype = {
+ get value() {
+ return this._value;
+ },
+ setValue: function(newValue) {
+ this._value = newValue;
+ },
+ getEncodedValue: function() {
+ return encodeHTML(this._value);
+ },
+ };
+
+ var Comment = function () {
+ this.childNodes = [];
+ };
+
+ Comment.prototype = {
+ __proto__: Node.prototype,
+
+ nodeName: "#comment",
+ nodeType: Node.COMMENT_NODE
+ };
+
+ var Text = function () {
+ this.childNodes = [];
+ };
+
+ Text.prototype = {
+ __proto__: Node.prototype,
+
+ nodeName: "#text",
+ nodeType: Node.TEXT_NODE,
+ get textContent() {
+ if (typeof this._textContent === "undefined") {
+ this._textContent = decodeHTML(this._innerHTML || "");
+ }
+ return this._textContent;
+ },
+ get innerHTML() {
+ if (typeof this._innerHTML === "undefined") {
+ this._innerHTML = encodeTextContentHTML(this._textContent || "");
+ }
+ return this._innerHTML;
+ },
+
+ set innerHTML(newHTML) {
+ this._innerHTML = newHTML;
+ delete this._textContent;
+ },
+ set textContent(newText) {
+ this._textContent = newText;
+ delete this._innerHTML;
+ },
+ };
+
+ var Document = function (url) {
+ this.documentURI = url;
+ this.styleSheets = [];
+ this.childNodes = [];
+ this.children = [];
+ };
+
+ Document.prototype = {
+ __proto__: Node.prototype,
+
+ nodeName: "#document",
+ nodeType: Node.DOCUMENT_NODE,
+ title: "",
+
+ getElementsByTagName: getElementsByTagName,
+
+ getElementById: function (id) {
+ function getElem(node) {
+ var length = node.children.length;
+ if (node.id === id)
+ return node;
+ for (var i = 0; i < length; i++) {
+ var el = getElem(node.children[i]);
+ if (el)
+ return el;
+ }
+ return null;
+ }
+ return getElem(this);
+ },
+
+ createElement: function (tag) {
+ var node = new Element(tag);
+ return node;
+ },
+
+ createTextNode: function (text) {
+ var node = new Text();
+ node.textContent = text;
+ return node;
+ },
+
+ get baseURI() {
+ if (!this.hasOwnProperty("_baseURI")) {
+ this._baseURI = this.documentURI;
+ var baseElements = this.getElementsByTagName("base");
+ var href = baseElements[0] && baseElements[0].getAttribute("href");
+ if (href) {
+ try {
+ this._baseURI = (new URL(href, this._baseURI)).href;
+ } catch (ex) {/* Just fall back to documentURI */}
+ }
+ }
+ return this._baseURI;
+ },
+ };
+
+ var Element = function (tag) {
+ // We use this to find the closing tag.
+ this._matchingTag = tag;
+ // We're explicitly a non-namespace aware parser, we just pretend it's all HTML.
+ var lastColonIndex = tag.lastIndexOf(":");
+ if (lastColonIndex != -1) {
+ tag = tag.substring(lastColonIndex + 1);
+ }
+ this.attributes = [];
+ this.childNodes = [];
+ this.children = [];
+ this.nextElementSibling = this.previousElementSibling = null;
+ this.localName = tag.toLowerCase();
+ this.tagName = tag.toUpperCase();
+ this.style = new Style(this);
+ };
+
+ Element.prototype = {
+ __proto__: Node.prototype,
+
+ nodeType: Node.ELEMENT_NODE,
+
+ getElementsByTagName: getElementsByTagName,
+
+ get className() {
+ return this.getAttribute("class") || "";
+ },
+
+ set className(str) {
+ this.setAttribute("class", str);
+ },
+
+ get id() {
+ return this.getAttribute("id") || "";
+ },
+
+ set id(str) {
+ this.setAttribute("id", str);
+ },
+
+ get href() {
+ return this.getAttribute("href") || "";
+ },
+
+ set href(str) {
+ this.setAttribute("href", str);
+ },
+
+ get src() {
+ return this.getAttribute("src") || "";
+ },
+
+ set src(str) {
+ this.setAttribute("src", str);
+ },
+
+ get srcset() {
+ return this.getAttribute("srcset") || "";
+ },
+
+ set srcset(str) {
+ this.setAttribute("srcset", str);
+ },
+
+ get nodeName() {
+ return this.tagName;
+ },
+
+ get innerHTML() {
+ function getHTML(node) {
+ var i = 0;
+ for (i = 0; i < node.childNodes.length; i++) {
+ var child = node.childNodes[i];
+ if (child.localName) {
+ arr.push("<" + child.localName);
+
+ // serialize attribute list
+ for (var j = 0; j < child.attributes.length; j++) {
+ var attr = child.attributes[j];
+ // the attribute value will be HTML escaped.
+ var val = attr.getEncodedValue();
+ var quote = (val.indexOf('"') === -1 ? '"' : "'");
+ arr.push(" " + attr.name + "=" + quote + val + quote);
+ }
+
+ if (child.localName in voidElems && !child.childNodes.length) {
+ // if this is a self-closing element, end it here
+ arr.push("/>");
+ } else {
+ // otherwise, add its children
+ arr.push(">");
+ getHTML(child);
+ arr.push("</" + child.localName + ">");
+ }
+ } else {
+ // This is a text node, so asking for innerHTML won't recurse.
+ arr.push(child.innerHTML);
+ }
+ }
+ }
+
+ // Using Array.join() avoids the overhead from lazy string concatenation.
+ var arr = [];
+ getHTML(this);
+ return arr.join("");
+ },
+
+ set innerHTML(html) {
+ var parser = new JSDOMParser();
+ var node = parser.parse(html);
+ var i;
+ for (i = this.childNodes.length; --i >= 0;) {
+ this.childNodes[i].parentNode = null;
+ }
+ this.childNodes = node.childNodes;
+ this.children = node.children;
+ for (i = this.childNodes.length; --i >= 0;) {
+ this.childNodes[i].parentNode = this;
+ }
+ },
+
+ set textContent(text) {
+ // clear parentNodes for existing children
+ for (var i = this.childNodes.length; --i >= 0;) {
+ this.childNodes[i].parentNode = null;
+ }
+
+ var node = new Text();
+ this.childNodes = [ node ];
+ this.children = [];
+ node.textContent = text;
+ node.parentNode = this;
+ },
+
+ get textContent() {
+ function getText(node) {
+ var nodes = node.childNodes;
+ for (var i = 0; i < nodes.length; i++) {
+ var child = nodes[i];
+ if (child.nodeType === 3) {
+ text.push(child.textContent);
+ } else {
+ getText(child);
+ }
+ }
+ }
+
+ // Using Array.join() avoids the overhead from lazy string concatenation.
+ // See http://blog.cdleary.com/2012/01/string-representation-in-spidermonkey/#ropes
+ var text = [];
+ getText(this);
+ return text.join("");
+ },
+
+ getAttribute: function (name) {
+ for (var i = this.attributes.length; --i >= 0;) {
+ var attr = this.attributes[i];
+ if (attr.name === name) {
+ return attr.value;
+ }
+ }
+ return undefined;
+ },
+
+ setAttribute: function (name, value) {
+ for (var i = this.attributes.length; --i >= 0;) {
+ var attr = this.attributes[i];
+ if (attr.name === name) {
+ attr.setValue(value);
+ return;
+ }
+ }
+ this.attributes.push(new Attribute(name, value));
+ },
+
+ removeAttribute: function (name) {
+ for (var i = this.attributes.length; --i >= 0;) {
+ var attr = this.attributes[i];
+ if (attr.name === name) {
+ this.attributes.splice(i, 1);
+ break;
+ }
+ }
+ },
+
+ hasAttribute: function (name) {
+ return this.attributes.some(function (attr) {
+ return attr.name == name;
+ });
+ },
+ };
+
+ var Style = function (node) {
+ this.node = node;
+ };
+
+ // getStyle() and setStyle() use the style attribute string directly. This
+ // won't be very efficient if there are a lot of style manipulations, but
+ // it's the easiest way to make sure the style attribute string and the JS
+ // style property stay in sync. Readability.js doesn't do many style
+ // manipulations, so this should be okay.
+ Style.prototype = {
+ getStyle: function (styleName) {
+ var attr = this.node.getAttribute("style");
+ if (!attr)
+ return undefined;
+
+ var styles = attr.split(";");
+ for (var i = 0; i < styles.length; i++) {
+ var style = styles[i].split(":");
+ var name = style[0].trim();
+ if (name === styleName)
+ return style[1].trim();
+ }
+
+ return undefined;
+ },
+
+ setStyle: function (styleName, styleValue) {
+ var value = this.node.getAttribute("style") || "";
+ var index = 0;
+ do {
+ var next = value.indexOf(";", index) + 1;
+ var length = next - index - 1;
+ var style = (length > 0 ? value.substr(index, length) : value.substr(index));
+ if (style.substr(0, style.indexOf(":")).trim() === styleName) {
+ value = value.substr(0, index).trim() + (next ? " " + value.substr(next).trim() : "");
+ break;
+ }
+ index = next;
+ } while (index);
+
+ value += " " + styleName + ": " + styleValue + ";";
+ this.node.setAttribute("style", value.trim());
+ }
+ };
+
+ // For each item in styleMap, define a getter and setter on the style
+ // property.
+ for (var jsName in styleMap) {
+ (function (cssName) {
+ Style.prototype.__defineGetter__(jsName, function () {
+ return this.getStyle(cssName);
+ });
+ Style.prototype.__defineSetter__(jsName, function (value) {
+ this.setStyle(cssName, value);
+ });
+ })(styleMap[jsName]);
+ }
+
+ var JSDOMParser = function () {
+ this.currentChar = 0;
+
+ // In makeElementNode() we build up many strings one char at a time. Using
+ // += for this results in lots of short-lived intermediate strings. It's
+ // better to build an array of single-char strings and then join() them
+ // together at the end. And reusing a single array (i.e. |this.strBuf|)
+ // over and over for this purpose uses less memory than using a new array
+ // for each string.
+ this.strBuf = [];
+
+ // Similarly, we reuse this array to return the two arguments from
+ // makeElementNode(), which saves us from having to allocate a new array
+ // every time.
+ this.retPair = [];
+
+ this.errorState = "";
+ };
+
+ JSDOMParser.prototype = {
+ error: function(m) {
+ if (typeof console !== "undefined") {
+ console.log("JSDOMParser error: " + m + "\n");
+ } else if (typeof dump !== "undefined") {
+ /* global dump */
+ dump("JSDOMParser error: " + m + "\n");
+ }
+ this.errorState += m + "\n";
+ },
+
+ /**
+ * Look at the next character without advancing the index.
+ */
+ peekNext: function () {
+ return this.html[this.currentChar];
+ },
+
+ /**
+ * Get the next character and advance the index.
+ */
+ nextChar: function () {
+ return this.html[this.currentChar++];
+ },
+
+ /**
+ * Called after a quote character is read. This finds the next quote
+ * character and returns the text string in between.
+ */
+ readString: function (quote) {
+ var str;
+ var n = this.html.indexOf(quote, this.currentChar);
+ if (n === -1) {
+ this.currentChar = this.html.length;
+ str = null;
+ } else {
+ str = this.html.substring(this.currentChar, n);
+ this.currentChar = n + 1;
+ }
+
+ return str;
+ },
+
+ /**
+ * Called when parsing a node. This finds the next name/value attribute
+ * pair and adds the result to the attributes list.
+ */
+ readAttribute: function (node) {
+ var name = "";
+
+ var n = this.html.indexOf("=", this.currentChar);
+ if (n === -1) {
+ this.currentChar = this.html.length;
+ } else {
+ // Read until a '=' character is hit; this will be the attribute key
+ name = this.html.substring(this.currentChar, n);
+ this.currentChar = n + 1;
+ }
+
+ if (!name)
+ return;
+
+ // After a '=', we should see a '"' for the attribute value
+ var c = this.nextChar();
+ if (c !== '"' && c !== "'") {
+ this.error("Error reading attribute " + name + ", expecting '\"'");
+ return;
+ }
+
+ // Read the attribute value (and consume the matching quote)
+ var value = this.readString(c);
+
+ node.attributes.push(new Attribute(name, decodeHTML(value)));
+
+ return;
+ },
+
+ /**
+ * Parses and returns an Element node. This is called after a '<' has been
+ * read.
+ *
+ * @returns an array; the first index of the array is the parsed node;
+ * the second index is a boolean indicating whether this is a void
+ * Element
+ */
+ makeElementNode: function (retPair) {
+ var c = this.nextChar();
+
+ // Read the Element tag name
+ var strBuf = this.strBuf;
+ strBuf.length = 0;
+ while (whitespace.indexOf(c) == -1 && c !== ">" && c !== "/") {
+ if (c === undefined)
+ return false;
+ strBuf.push(c);
+ c = this.nextChar();
+ }
+ var tag = strBuf.join("");
+
+ if (!tag)
+ return false;
+
+ var node = new Element(tag);
+
+ // Read Element attributes
+ while (c !== "/" && c !== ">") {
+ if (c === undefined)
+ return false;
+ while (whitespace.indexOf(this.html[this.currentChar++]) != -1) {
+ // Advance cursor to first non-whitespace char.
+ }
+ this.currentChar--;
+ c = this.nextChar();
+ if (c !== "/" && c !== ">") {
+ --this.currentChar;
+ this.readAttribute(node);
+ }
+ }
+
+ // If this is a self-closing tag, read '/>'
+ var closed = false;
+ if (c === "/") {
+ closed = true;
+ c = this.nextChar();
+ if (c !== ">") {
+ this.error("expected '>' to close " + tag);
+ return false;
+ }
+ }
+
+ retPair[0] = node;
+ retPair[1] = closed;
+ return true;
+ },
+
+ /**
+ * If the current input matches this string, advance the input index;
+ * otherwise, do nothing.
+ *
+ * @returns whether input matched string
+ */
+ match: function (str) {
+ var strlen = str.length;
+ if (this.html.substr(this.currentChar, strlen).toLowerCase() === str.toLowerCase()) {
+ this.currentChar += strlen;
+ return true;
+ }
+ return false;
+ },
+
+ /**
+ * Searches the input until a string is found and discards all input up to
+ * and including the matched string.
+ */
+ discardTo: function (str) {
+ var index = this.html.indexOf(str, this.currentChar) + str.length;
+ if (index === -1)
+ this.currentChar = this.html.length;
+ this.currentChar = index;
+ },
+
+ /**
+ * Reads child nodes for the given node.
+ */
+ readChildren: function (node) {
+ var child;
+ while ((child = this.readNode())) {
+ // Don't keep Comment nodes
+ if (child.nodeType !== 8) {
+ node.appendChild(child);
+ }
+ }
+ },
+
+ discardNextComment: function() {
+ if (this.match("--")) {
+ this.discardTo("-->");
+ } else {
+ var c = this.nextChar();
+ while (c !== ">") {
+ if (c === undefined)
+ return null;
+ if (c === '"' || c === "'")
+ this.readString(c);
+ c = this.nextChar();
+ }
+ }
+ return new Comment();
+ },
+
+
+ /**
+ * Reads the next child node from the input. If we're reading a closing
+ * tag, or if we've reached the end of input, return null.
+ *
+ * @returns the node
+ */
+ readNode: function () {
+ var c = this.nextChar();
+
+ if (c === undefined)
+ return null;
+
+ // Read any text as Text node
+ var textNode;
+ if (c !== "<") {
+ --this.currentChar;
+ textNode = new Text();
+ var n = this.html.indexOf("<", this.currentChar);
+ if (n === -1) {
+ textNode.innerHTML = this.html.substring(this.currentChar, this.html.length);
+ this.currentChar = this.html.length;
+ } else {
+ textNode.innerHTML = this.html.substring(this.currentChar, n);
+ this.currentChar = n;
+ }
+ return textNode;
+ }
+
+ if (this.match("![CDATA[")) {
+ var endChar = this.html.indexOf("]]>", this.currentChar);
+ if (endChar === -1) {
+ this.error("unclosed CDATA section");
+ return null;
+ }
+ textNode = new Text();
+ textNode.textContent = this.html.substring(this.currentChar, endChar);
+ this.currentChar = endChar + ("]]>").length;
+ return textNode;
+ }
+
+ c = this.peekNext();
+
+ // Read Comment node. Normally, Comment nodes know their inner
+ // textContent, but we don't really care about Comment nodes (we throw
+ // them away in readChildren()). So just returning an empty Comment node
+ // here is sufficient.
+ if (c === "!" || c === "?") {
+ // We're still before the ! or ? that is starting this comment:
+ this.currentChar++;
+ return this.discardNextComment();
+ }
+
+ // If we're reading a closing tag, return null. This means we've reached
+ // the end of this set of child nodes.
+ if (c === "/") {
+ --this.currentChar;
+ return null;
+ }
+
+ // Otherwise, we're looking at an Element node
+ var result = this.makeElementNode(this.retPair);
+ if (!result)
+ return null;
+
+ var node = this.retPair[0];
+ var closed = this.retPair[1];
+ var localName = node.localName;
+
+ // If this isn't a void Element, read its child nodes
+ if (!closed) {
+ this.readChildren(node);
+ var closingTag = "</" + node._matchingTag + ">";
+ if (!this.match(closingTag)) {
+ this.error("expected '" + closingTag + "' and got " + this.html.substr(this.currentChar, closingTag.length));
+ return null;
+ }
+ }
+
+ // Only use the first title, because SVG might have other
+ // title elements which we don't care about (medium.com
+ // does this, at least).
+ if (localName === "title" && !this.doc.title) {
+ this.doc.title = node.textContent.trim();
+ } else if (localName === "head") {
+ this.doc.head = node;
+ } else if (localName === "body") {
+ this.doc.body = node;
+ } else if (localName === "html") {
+ this.doc.documentElement = node;
+ }
+
+ return node;
+ },
+
+ /**
+ * Parses an HTML string and returns a JS implementation of the Document.
+ */
+ parse: function (html, url) {
+ this.html = html;
+ var doc = this.doc = new Document(url);
+ this.readChildren(doc);
+
+ // If this is an HTML document, remove root-level children except for the
+ // <html> node
+ if (doc.documentElement) {
+ for (var i = doc.childNodes.length; --i >= 0;) {
+ var child = doc.childNodes[i];
+ if (child !== doc.documentElement) {
+ doc.removeChild(child);
+ }
+ }
+ }
+
+ return doc;
+ }
+ };
+
+ // Attach the standard DOM types to the global scope
+ global.Node = Node;
+ global.Comment = Comment;
+ global.Document = Document;
+ global.Element = Element;
+ global.Text = Text;
+
+ // Attach JSDOMParser to the global scope
+ global.JSDOMParser = JSDOMParser;
+
+})(this);
+
+if (typeof module === "object") {
+ /* global module */
+ module.exports = this.JSDOMParser;
+}
diff --git a/toolkit/components/reader/readability/LICENSE.md b/toolkit/components/reader/readability/LICENSE.md
new file mode 100644
index 0000000000..ca8e58b203
--- /dev/null
+++ b/toolkit/components/reader/readability/LICENSE.md
@@ -0,0 +1,13 @@
+Copyright (c) 2010 Arc90 Inc
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/toolkit/components/reader/readability/Readability-readerable.js b/toolkit/components/reader/readability/Readability-readerable.js
new file mode 100644
index 0000000000..892169fb94
--- /dev/null
+++ b/toolkit/components/reader/readability/Readability-readerable.js
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2010 Arc90 Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * This code is heavily based on Arc90's readability.js (1.7.1) script
+ * available at: http://code.google.com/p/arc90labs-readability
+ */
+
+var REGEXPS = {
+ // NOTE: These two regular expressions are duplicated in
+ // Readability.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,
+};
+
+function isNodeVisible(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));
+}
+
+/**
+ * Decides whether or not the document is reader-able without parsing the whole thing.
+ * @param {Object} options Configuration object.
+ * @param {number} [options.minContentLength=140] The minimum node content length used to decide if the document is readerable.
+ * @param {number} [options.minScore=20] The minumum cumulated 'score' used to determine if the document is readerable.
+ * @param {Function} [options.visibilityChecker=isNodeVisible] The function used to determine if a node is visible.
+ * @return {boolean} Whether or not we suspect Readability.parse() will suceeed at returning an article object.
+ */
+function isProbablyReaderable(doc, options = {}) {
+ // For backward compatibility reasons 'options' can either be a configuration object or the function used
+ // to determine if a node is visible.
+ if (typeof options == "function") {
+ options = { visibilityChecker: options };
+ }
+
+ var defaultOptions = { minScore: 20, minContentLength: 140, visibilityChecker: isNodeVisible };
+ options = Object.assign(defaultOptions, options);
+
+ var nodes = doc.querySelectorAll("p, pre, article");
+
+ // Get <div> nodes which have <br> node(s) and append them into the `nodes` variable.
+ // Some articles' DOM structures might look like
+ // <div>
+ // Sentences<br>
+ // <br>
+ // Sentences<br>
+ // </div>
+ var brNodes = doc.querySelectorAll("div > br");
+ if (brNodes.length) {
+ var set = new Set(nodes);
+ [].forEach.call(brNodes, function (node) {
+ set.add(node.parentNode);
+ });
+ nodes = Array.from(set);
+ }
+
+ var score = 0;
+ // This is a little cheeky, we use the accumulator 'score' to decide what to return from
+ // this callback:
+ return [].some.call(nodes, function (node) {
+ if (!options.visibilityChecker(node)) {
+ return false;
+ }
+
+ var matchString = node.className + " " + node.id;
+ if (REGEXPS.unlikelyCandidates.test(matchString) &&
+ !REGEXPS.okMaybeItsACandidate.test(matchString)) {
+ return false;
+ }
+
+ if (node.matches("li p")) {
+ return false;
+ }
+
+ var textContentLength = node.textContent.trim().length;
+ if (textContentLength < options.minContentLength) {
+ return false;
+ }
+
+ score += Math.sqrt(textContentLength - options.minContentLength);
+
+ if (score > options.minScore) {
+ return true;
+ }
+ return false;
+ });
+}
+
+if (typeof module === "object") {
+ /* global module */
+ module.exports = isProbablyReaderable;
+}
diff --git a/toolkit/components/reader/readability/Readability.js b/toolkit/components/reader/readability/Readability.js
new file mode 100644
index 0000000000..b745aa01d8
--- /dev/null
+++ b/toolkit/components/reader/readability/Readability.js
@@ -0,0 +1,2314 @@
+/*
+ * Copyright (c) 2010 Arc90 Inc
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * This code is heavily based on Arc90's readability.js (1.7.1) script
+ * available at: http://code.google.com/p/arc90labs-readability
+ */
+
+/**
+ * Public constructor.
+ * @param {HTMLDocument} doc The document to parse.
+ * @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._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;
+ this._serializer = options.serializer || function(el) {
+ return el.innerHTML;
+ };
+ this._disableJSONLD = !!options.disableJSONLD;
+ this._allowedVideoRegex = options.allowedVideoRegex || this.REGEXPS.videos;
+
+ // Start with all flags set
+ this._flags = this.FLAG_STRIP_UNLIKELYS |
+ this.FLAG_WEIGHT_CLASSES |
+ this.FLAG_CLEAN_CONDITIONALLY;
+
+
+ // Control whether log messages are sent to the console
+ if (this._debug) {
+ let logNode = function(node) {
+ if (node.nodeType == node.TEXT_NODE) {
+ return `${node.nodeName} ("${node.textContent}")`;
+ }
+ let attrPairs = Array.from(node.attributes || [], function(attr) {
+ return `${attr.name}="${attr.value}"`;
+ }).join(" ");
+ return `<${node.localName} ${attrPairs}>`;
+ };
+ this.log = function () {
+ if (typeof console !== "undefined") {
+ let args = Array.from(arguments, arg => {
+ if (arg && arg.nodeType == this.ELEMENT_NODE) {
+ return logNode(arg);
+ }
+ return arg;
+ });
+ args.unshift("Reader: (Readability)");
+ console.log.apply(console, args);
+ } else if (typeof dump !== "undefined") {
+ /* global dump */
+ var msg = Array.prototype.map.call(arguments, function(x) {
+ return (x && x.nodeName) ? logNode(x) : x;
+ }).join(" ");
+ dump("Reader: (Readability) " + msg + "\n");
+ }
+ };
+ } 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: /-ad-|hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|foot|footer|footnote|gdpr|masthead|media|meta|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget/i,
+ extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
+ byline: /byline|author|dateline|writtenby|p-author/i,
+ replaceFonts: /<(\/?)font[^>]*>/gi,
+ normalize: /\s{2,}/g,
+ videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i,
+ shareElements: /(\b|_)(share|sharedaddy)(\b|_)/i,
+ nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
+ prevLink: /(prev|earl|old|new|<|«)/i,
+ tokenize: /\W+/g,
+ whitespace: /^\s*$/,
+ hasContent: /\S$/,
+ hashUrl: /^#.+/,
+ srcsetUrl: /(\S+)(\s+[\d.]+[xw])?(\s*(?:,|$))/g,
+ b64DataUrl: /^data:\s*([^\s;,]+)\s*;\s*base64\s*,/i,
+ // Commas as used in Latin, Sindhi, Chinese and various other scripts.
+ // see: https://en.wikipedia.org/wiki/Comma#Comma_variants
+ commas: /\u002C|\u060C|\uFE50|\uFE10|\uFE11|\u2E41|\u2E34|\u2E32|\uFF0C/g,
+ // See: https://schema.org/Article
+ jsonLdArticleTypes: /^Article|AdvertiserContentArticle|NewsArticle|AnalysisNewsArticle|AskPublicNewsArticle|BackgroundNewsArticle|OpinionNewsArticle|ReportageNewsArticle|ReviewNewsArticle|Report|SatiricalArticle|ScholarlyArticle|MedicalScholarlyArticle|SocialMediaPosting|BlogPosting|LiveBlogPosting|DiscussionForumPosting|TechArticle|APIReference$/
+ },
+
+ UNLIKELY_ROLES: [ "menu", "menubar", "complementary", "navigation", "alert", "alertdialog", "dialog" ],
+
+ DIV_TO_P_ELEMS: new Set([ "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL" ]),
+
+ 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" ],
+
+ // These are the list of HTML entities that need to be escaped.
+ HTML_ESCAPE_MAP: {
+ "lt": "<",
+ "gt": ">",
+ "amp": "&",
+ "quot": '"',
+ "apos": "'",
+ },
+
+ /**
+ * 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);
+
+ this._simplifyNestedElements(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 (const node of nodeList) {
+ 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, and return the first node that passes
+ * the supplied test function
+ *
+ * For convenience, the current object context is applied to the provided
+ * test function.
+ *
+ * @param NodeList nodeList The NodeList.
+ * @param Function fn The test function.
+ * @return void
+ */
+ _findNode: function(nodeList, fn) {
+ return Array.prototype.find.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;
+ }
+
+ // 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 {
+ // if the link has multiple children, they should all be preserved
+ var container = this._doc.createElement("span");
+ while (link.firstChild) {
+ container.appendChild(link.firstChild);
+ }
+ link.parentNode.replaceChild(container, link);
+ }
+ } else {
+ link.setAttribute("href", toAbsoluteURI(href));
+ }
+ }
+ });
+
+ var medias = this._getAllNodesWithTag(articleContent, [
+ "img", "picture", "figure", "video", "audio", "source"
+ ]);
+
+ this._forEachNode(medias, function(media) {
+ var src = media.getAttribute("src");
+ var poster = media.getAttribute("poster");
+ var srcset = media.getAttribute("srcset");
+
+ if (src) {
+ media.setAttribute("src", toAbsoluteURI(src));
+ }
+
+ if (poster) {
+ media.setAttribute("poster", toAbsoluteURI(poster));
+ }
+
+ if (srcset) {
+ var newSrcset = srcset.replace(this.REGEXPS.srcsetUrl, function(_, p1, p2, p3) {
+ return toAbsoluteURI(p1) + (p2 || "") + p3;
+ });
+
+ media.setAttribute("srcset", newSrcset);
+ }
+ });
+ },
+
+ _simplifyNestedElements: function(articleContent) {
+ var node = articleContent;
+
+ while (node) {
+ if (node.parentNode && ["DIV", "SECTION"].includes(node.tagName) && !(node.id && node.id.startsWith("readability"))) {
+ if (this._isElementWithoutContent(node)) {
+ node = this._removeAndGetNext(node);
+ continue;
+ } else if (this._hasSingleTagInsideElement(node, "DIV") || this._hasSingleTagInsideElement(node, "SECTION")) {
+ var child = node.children[0];
+ for (var i = 0; i < node.attributes.length; i++) {
+ child.setAttribute(node.attributes[i].name, node.attributes[i].value);
+ }
+ node.parentNode.replaceChild(child, node);
+ node = child;
+ continue;
+ }
+ }
+
+ node = this._getNextNode(node);
+ }
+ },
+
+ /**
+ * Get the article title as an H1.
+ *
+ * @return string
+ **/
+ _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;
+ }
+ }
+ } 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 node, starting from the given node, and ignoring
+ * whitespace in between. If the given node is an element, the same node is
+ * returned.
+ */
+ _nextNode: 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 node
+ // or non-whitespace. This leaves behind the first <br> in the chain
+ // (which will be replaced with a <p> later).
+ while ((next = this._nextNode(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._nextNode(next.nextSibling);
+ if (nextElem && nextElem.tagName == "BR")
+ break;
+ }
+
+ if (!this._isPhrasingContent(next))
+ 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");
+ }
+ });
+ },
+
+ _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.
+ */
+ }
+ }
+ 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, "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;
+ });
+ });
+
+ 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");
+
+ // replace H1 with H2 as H1 should be only title that is displayed separately
+ this._replaceNodeTags(this._getAllNodesWithTag(articleContent, ["h1"]), "h2");
+
+ // 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._nextNode(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;
+ },
+
+ // compares second text to first one
+ // 1 = same text, 0 = completely different text
+ // works the way that it splits both texts into words and then finds words that are unique in second text
+ // the result is given by the lower length of unique parts
+ _textSimilarity: function(textA, textB) {
+ var tokensA = textA.toLowerCase().split(this.REGEXPS.tokenize).filter(Boolean);
+ var tokensB = textB.toLowerCase().split(this.REGEXPS.tokenize).filter(Boolean);
+ if (!tokensA.length || !tokensB.length) {
+ return 0;
+ }
+ var uniqTokensB = tokensB.filter(token => !tokensA.includes(token));
+ var distanceB = uniqTokensB.join(" ").length / tokensB.join(" ").length;
+ return 1 - distanceB;
+ },
+
+ _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;
+ }
+
+ 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;
+ 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) {
+ this.log("Starting grabArticle loop");
+ 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;
+
+ let shouldRemoveTitleHeader = true;
+
+ while (node) {
+
+ if (node.tagName === "HTML") {
+ this._articleLang = node.getAttribute("lang");
+ }
+
+ var matchString = node.className + " " + node.id;
+
+ if (!this._isProbablyVisible(node)) {
+ this.log("Removing hidden node - " + matchString);
+ node = this._removeAndGetNext(node);
+ continue;
+ }
+
+ // User is not able to see elements applied with both "aria-modal = true" and "role = dialog"
+ if (node.getAttribute("aria-modal") == "true" && node.getAttribute("role") == "dialog") {
+ 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;
+ }
+
+ if (shouldRemoveTitleHeader && this._headerDuplicatesTitle(node)) {
+ this.log("Removing header: ", node.textContent.trim(), this._articleTitle.trim());
+ shouldRemoveTitleHeader = false;
+ 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") &&
+ !this._hasAncestorTag(node, "code") &&
+ node.tagName !== "BODY" &&
+ node.tagName !== "A") {
+ this.log("Removing unlikely candidate - " + matchString);
+ node = this._removeAndGetNext(node);
+ continue;
+ }
+
+ if (this.UNLIKELY_ROLES.includes(node.getAttribute("role"))) {
+ this.log("Removing content with role " + node.getAttribute("role") + " - " + 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;
+ }
+
+ // 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, 5);
+ 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(this.REGEXPS.commas).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;
+ });
+ });
+
+ // 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:
+ while (page.firstChild) {
+ this.log("Moving child out:", page.firstChild);
+ topCandidate.appendChild(page.firstChild);
+ }
+
+ 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);
+ }
+
+ // 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;
+ }
+
+ // 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);
+ }
+ }
+
+ // 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 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);
+ // Fetch children again to make it compatible
+ // with DOM parsers without live collection support.
+ siblings = parentOfTopCandidate.children;
+ // 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";
+ while (articleContent.firstChild) {
+ div.appendChild(articleContent.firstChild);
+ }
+ 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;
+ }
+ 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;
+ },
+
+ /**
+ * Converts some of the common HTML entities in string to their corresponding characters.
+ *
+ * @param str {string} - a string to unescape.
+ * @return string without HTML entity.
+ */
+ _unescapeHtmlEntities: function(str) {
+ if (!str) {
+ return str;
+ }
+
+ var htmlEscapeMap = this.HTML_ESCAPE_MAP;
+ return str.replace(/&(quot|amp|apos|lt|gt);/g, function(_, tag) {
+ return htmlEscapeMap[tag];
+ }).replace(/&#(?:x([0-9a-z]{1,4})|([0-9]{1,4}));/gi, function(_, hex, numStr) {
+ var num = parseInt(hex || numStr, hex ? 16 : 10);
+ return String.fromCharCode(num);
+ });
+ },
+
+ /**
+ * Try to extract metadata from JSON-LD object.
+ * For now, only Schema.org objects of type Article or its subtypes are supported.
+ * @return Object with any metadata that could be extracted (possibly none)
+ */
+ _getJSONLD: function (doc) {
+ var scripts = this._getAllNodesWithTag(doc, ["script"]);
+
+ var metadata;
+
+ this._forEachNode(scripts, function(jsonLdElement) {
+ if (!metadata && jsonLdElement.getAttribute("type") === "application/ld+json") {
+ try {
+ // Strip CDATA markers if present
+ var content = jsonLdElement.textContent.replace(/^\s*<!\[CDATA\[|\]\]>\s*$/g, "");
+ var parsed = JSON.parse(content);
+ if (
+ !parsed["@context"] ||
+ !parsed["@context"].match(/^https?\:\/\/schema\.org$/)
+ ) {
+ return;
+ }
+
+ if (!parsed["@type"] && Array.isArray(parsed["@graph"])) {
+ parsed = parsed["@graph"].find(function(it) {
+ return (it["@type"] || "").match(
+ this.REGEXPS.jsonLdArticleTypes
+ );
+ });
+ }
+
+ if (
+ !parsed ||
+ !parsed["@type"] ||
+ !parsed["@type"].match(this.REGEXPS.jsonLdArticleTypes)
+ ) {
+ return;
+ }
+
+ metadata = {};
+
+ if (typeof parsed.name === "string" && typeof parsed.headline === "string" && parsed.name !== parsed.headline) {
+ // we have both name and headline element in the JSON-LD. They should both be the same but some websites like aktualne.cz
+ // put their own name into "name" and the article title to "headline" which confuses Readability. So we try to check if either
+ // "name" or "headline" closely matches the html title, and if so, use that one. If not, then we use "name" by default.
+
+ var title = this._getArticleTitle();
+ var nameMatches = this._textSimilarity(parsed.name, title) > 0.75;
+ var headlineMatches = this._textSimilarity(parsed.headline, title) > 0.75;
+
+ if (headlineMatches && !nameMatches) {
+ metadata.title = parsed.headline;
+ } else {
+ metadata.title = parsed.name;
+ }
+ } else if (typeof parsed.name === "string") {
+ metadata.title = parsed.name.trim();
+ } else if (typeof parsed.headline === "string") {
+ metadata.title = parsed.headline.trim();
+ }
+ if (parsed.author) {
+ if (typeof parsed.author.name === "string") {
+ metadata.byline = parsed.author.name.trim();
+ } else if (Array.isArray(parsed.author) && parsed.author[0] && typeof parsed.author[0].name === "string") {
+ metadata.byline = parsed.author
+ .filter(function(author) {
+ return author && typeof author.name === "string";
+ })
+ .map(function(author) {
+ return author.name.trim();
+ })
+ .join(", ");
+ }
+ }
+ if (typeof parsed.description === "string") {
+ metadata.excerpt = parsed.description.trim();
+ }
+ if (
+ parsed.publisher &&
+ typeof parsed.publisher.name === "string"
+ ) {
+ metadata.siteName = parsed.publisher.name.trim();
+ }
+ if (typeof parsed.datePublished === "string") {
+ metadata.datePublished = parsed.datePublished.trim();
+ }
+ return;
+ } catch (err) {
+ this.log(err.message);
+ }
+ }
+ });
+ return metadata ? metadata : {};
+ },
+
+ /**
+ * Attempts to get excerpt and byline metadata for the article.
+ *
+ * @param {Object} jsonld — object containing any metadata that
+ * could be extracted from JSON-LD object.
+ *
+ * @return Object with optional "excerpt" and "byline" properties
+ */
+ _getArticleMetadata: function(jsonld) {
+ var metadata = {};
+ var values = {};
+ var metaElements = this._doc.getElementsByTagName("meta");
+
+ // property is a space-separated list of values
+ var propertyPattern = /\s*(article|dc|dcterm|og|twitter)\s*:\s*(author|creator|description|published_time|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) {
+ // Convert to lowercase, and remove any whitespace
+ // so we can match below.
+ name = matches[0].toLowerCase().replace(/\s/g, "");
+ // multiple authors
+ values[name] = content.trim();
+ }
+ }
+ 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 = jsonld.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 = jsonld.byline ||
+ values["dc:creator"] ||
+ values["dcterm:creator"] ||
+ values["author"];
+
+ // get description
+ metadata.excerpt = jsonld.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 = jsonld.siteName ||
+ values["og:site_name"];
+
+ // get article published time
+ metadata.publishedTime = jsonld.datePublished ||
+ values["article:published_time"] || null;
+
+ // in many sites the meta value is escaped with HTML entities,
+ // so here we need to unescape it
+ metadata.title = this._unescapeHtmlEntities(metadata.title);
+ metadata.byline = this._unescapeHtmlEntities(metadata.byline);
+ metadata.excerpt = this._unescapeHtmlEntities(metadata.excerpt);
+ metadata.siteName = this._unescapeHtmlEntities(metadata.siteName);
+ metadata.publishedTime = this._unescapeHtmlEntities(metadata.publishedTime);
+
+ return metadata;
+ },
+
+ /**
+ * Check if node is image, or if node contains exactly only one image
+ * whether as a direct child or as its descendants.
+ *
+ * @param Element
+ **/
+ _isSingleImage: function(node) {
+ if (node.tagName === "IMG") {
+ return true;
+ }
+
+ if (node.children.length !== 1 || node.textContent.trim() !== "") {
+ return false;
+ }
+
+ return this._isSingleImage(node.children[0]);
+ },
+
+ /**
+ * Find all <noscript> that are located after <img> nodes, and which contain only one
+ * <img> element. Replace the first image with the image from inside the <noscript> tag,
+ * and remove the <noscript> tag. This improves the quality of the images we use on
+ * some sites (e.g. Medium).
+ *
+ * @param Element
+ **/
+ _unwrapNoscriptImages: function(doc) {
+ // Find img without source or attributes that might contains image, and remove it.
+ // This is done to prevent a placeholder img is replaced by img from noscript in next step.
+ var imgs = Array.from(doc.getElementsByTagName("img"));
+ this._forEachNode(imgs, function(img) {
+ for (var i = 0; i < img.attributes.length; i++) {
+ var attr = img.attributes[i];
+ switch (attr.name) {
+ case "src":
+ case "srcset":
+ case "data-src":
+ case "data-srcset":
+ return;
+ }
+
+ if (/\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
+ return;
+ }
+ }
+
+ img.parentNode.removeChild(img);
+ });
+
+ // Next find noscript and try to extract its image
+ var noscripts = Array.from(doc.getElementsByTagName("noscript"));
+ this._forEachNode(noscripts, function(noscript) {
+ // Parse content of noscript and make sure it only contains image
+ var tmp = doc.createElement("div");
+ tmp.innerHTML = noscript.innerHTML;
+ if (!this._isSingleImage(tmp)) {
+ return;
+ }
+
+ // If noscript has previous sibling and it only contains image,
+ // replace it with noscript content. However we also keep old
+ // attributes that might contains image.
+ var prevElement = noscript.previousElementSibling;
+ if (prevElement && this._isSingleImage(prevElement)) {
+ var prevImg = prevElement;
+ if (prevImg.tagName !== "IMG") {
+ prevImg = prevElement.getElementsByTagName("img")[0];
+ }
+
+ var newImg = tmp.getElementsByTagName("img")[0];
+ for (var i = 0; i < prevImg.attributes.length; i++) {
+ var attr = prevImg.attributes[i];
+ if (attr.value === "") {
+ continue;
+ }
+
+ if (attr.name === "src" || attr.name === "srcset" || /\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
+ if (newImg.getAttribute(attr.name) === attr.value) {
+ continue;
+ }
+
+ var attrName = attr.name;
+ if (newImg.hasAttribute(attrName)) {
+ attrName = "data-old-" + attrName;
+ }
+
+ newImg.setAttribute(attrName, attr.value);
+ }
+ }
+
+ noscript.parentNode.replaceChild(tmp.firstElementChild, prevElement);
+ }
+ });
+ },
+
+ /**
+ * Removes script tags from the document.
+ *
+ * @param Element
+ **/
+ _removeScripts: function(doc) {
+ this._removeNodes(this._getAllNodesWithTag(doc, ["script", "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.has(node.tagName) ||
+ 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) {
+ var href = linkNode.getAttribute("href");
+ var coefficient = href && this.REGEXPS.hashUrl.test(href) ? 0.3 : 1;
+ linkLength += this._getInnerText(linkNode).length * coefficient;
+ });
+
+ 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._allowedVideoRegex.test(element.attributes[i].value)) {
+ return false;
+ }
+ }
+
+ // For embed with <object> tag, check inner HTML as well.
+ if (element.tagName === "object" && this._allowedVideoRegex.test(element.innerHTML)) {
+ return false;
+ }
+ }
+
+ 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);
+ }
+ 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://searchfox.org/mozilla-central/rev/f82d5c549f046cb64ce5602bfd894b7ae807c8f8/accessible/generic/TableAccessible.cpp#19
+ */
+ _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;
+ }
+ },
+
+ /* convert images and figures that have properties like data-src into images that can be loaded without JS */
+ _fixLazyImages: function (root) {
+ this._forEachNode(this._getAllNodesWithTag(root, ["img", "picture", "figure"]), function (elem) {
+ // In some sites (e.g. Kotaku), they put 1px square image as base64 data uri in the src attribute.
+ // So, here we check if the data uri is too short, just might as well remove it.
+ if (elem.src && this.REGEXPS.b64DataUrl.test(elem.src)) {
+ // Make sure it's not SVG, because SVG can have a meaningful image in under 133 bytes.
+ var parts = this.REGEXPS.b64DataUrl.exec(elem.src);
+ if (parts[1] === "image/svg+xml") {
+ return;
+ }
+
+ // Make sure this element has other attributes which contains image.
+ // If it doesn't, then this src is important and shouldn't be removed.
+ var srcCouldBeRemoved = false;
+ for (var i = 0; i < elem.attributes.length; i++) {
+ var attr = elem.attributes[i];
+ if (attr.name === "src") {
+ continue;
+ }
+
+ if (/\.(jpg|jpeg|png|webp)/i.test(attr.value)) {
+ srcCouldBeRemoved = true;
+ break;
+ }
+ }
+
+ // Here we assume if image is less than 100 bytes (or 133B after encoded to base64)
+ // it will be too small, therefore it might be placeholder image.
+ if (srcCouldBeRemoved) {
+ var b64starts = elem.src.search(/base64\s*/i) + 7;
+ var b64length = elem.src.length - b64starts;
+ if (b64length < 133) {
+ elem.removeAttribute("src");
+ }
+ }
+ }
+
+ // also check for "null" to work around https://github.com/jsdom/jsdom/issues/2580
+ if ((elem.src || (elem.srcset && elem.srcset != "null")) && elem.className.toLowerCase().indexOf("lazy") === -1) {
+ return;
+ }
+
+ for (var j = 0; j < elem.attributes.length; j++) {
+ attr = elem.attributes[j];
+ if (attr.name === "src" || attr.name === "srcset" || attr.name === "alt") {
+ 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);
+ }
+ }
+ }
+ });
+ },
+
+ _getTextDensity: function(e, tags) {
+ var textLength = this._getInnerText(e, true).length;
+ if (textLength === 0) {
+ return 0;
+ }
+ var childrenLength = 0;
+ var children = this._getAllNodesWithTag(e, tags);
+ this._forEachNode(children, (child) => childrenLength += this._getInnerText(child, true).length);
+ return childrenLength / textLength;
+ },
+
+ /**
+ * 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;
+
+ // 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;
+ };
+
+ var isList = tag === "ul" || tag === "ol";
+ if (!isList) {
+ var listLength = 0;
+ var listNodes = this._getAllNodesWithTag(node, ["ul", "ol"]);
+ this._forEachNode(listNodes, (list) => listLength += this._getInnerText(list).length);
+ isList = listLength / this._getInnerText(node).length > 0.9;
+ }
+
+ 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;
+ }
+
+ if (this._hasAncestorTag(node, "code")) {
+ return false;
+ }
+
+ var weight = this._getClassWeight(node);
+
+ this.log("Cleaning Conditionally", node);
+
+ var contentScore = 0;
+
+ 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 headingDensity = this._getTextDensity(node, ["h1", "h2", "h3", "h4", "h5", "h6"]);
+
+ 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._allowedVideoRegex.test(embeds[i].attributes[j].value)) {
+ return false;
+ }
+ }
+
+ // For embed with <object> tag, check inner HTML as well.
+ if (embeds[i].tagName === "object" && this._allowedVideoRegex.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 && headingDensity < 0.9 && 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);
+ // Allow simple lists of images to remain in pages
+ if (isList && haveToRemove) {
+ for (var x = 0; x < node.children.length; x++) {
+ let child = node.children[x];
+ // Don't filter in lists with li's that contain more than one child
+ if (child.children.length > 1) {
+ return haveToRemove;
+ }
+ }
+ let li_count = node.getElementsByTagName("li").length;
+ // Only allow the list to remain if every li contains an image
+ if (img == li_count) {
+ return false;
+ }
+ }
+ 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);
+ }
+ }
+ },
+
+ /**
+ * Clean out spurious headers from an Element.
+ *
+ * @param Element
+ * @return void
+ **/
+ _cleanHeaders: function(e) {
+ let headingNodes = this._getAllNodesWithTag(e, ["h1", "h2"]);
+ this._removeNodes(headingNodes, function(node) {
+ let shouldRemove = this._getClassWeight(node) < 0;
+ if (shouldRemove) {
+ this.log("Removing header with low class weight:", node);
+ }
+ return shouldRemove;
+ });
+ },
+
+ /**
+ * Check if this node is an H1 or H2 element whose content is mostly
+ * the same as the article title.
+ *
+ * @param Element the node to check.
+ * @return boolean indicating whether this is a title-like header.
+ */
+ _headerDuplicatesTitle: function(node) {
+ if (node.tagName != "H1" && node.tagName != "H2") {
+ return false;
+ }
+ var heading = this._getInnerText(node, false);
+ this.log("Evaluating similarity of header:", heading, this._articleTitle);
+ return this._textSimilarity(this._articleTitle, heading) > 0.75;
+ },
+
+ _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.style || node.style.visibility != "hidden")
+ && !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");
+ }
+ }
+
+ // Unwrap image from noscript
+ this._unwrapNoscriptImages(this._doc);
+
+ // Extract JSON-LD metadata before removing scripts
+ var jsonLd = this._disableJSONLD ? {} : this._getJSONLD(this._doc);
+
+ // Remove script tags from the document.
+ this._removeScripts(this._doc);
+
+ this._prepDocument();
+
+ var metadata = this._getArticleMetadata(jsonLd);
+ 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,
+ lang: this._articleLang,
+ content: this._serializer(articleContent),
+ textContent: textContent,
+ length: textContent.length,
+ excerpt: metadata.excerpt,
+ siteName: metadata.siteName || this._articleSiteName,
+ publishedTime: metadata.publishedTime
+ };
+ }
+};
+
+if (typeof module === "object") {
+ /* global module */
+ module.exports = Readability;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 19:57:52 +0000