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gildas-lormeau/userscript.js

Created November 17, 2019 00:37
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Save page in reader mode with SingleFile
Raw
userscript.js
// ==UserScript==
// @name Save page in reader mode
// @namespace https://github.com/gildas-lormeau/SingleFile/
// @version 1.0
// @description Save page in reader mode with SingleFile
// @author Gildas Lormeau
// @match *://*/*
// @grant none
// ==/UserScript==
(function () {
'use strict';
dispatchEvent(new CustomEvent("single-file-user-script-init"));
let styleContent;
addEventListener("single-file-on-before-capture-request", event => {
const article = new Readability(document).parse();
document.body.innerHTML = "";
const styleElement = document.createElement("style");
styleElement.textContent = styleContent;
document.body.appendChild(styleElement);
document.body.innerHTML += article.content;
document.body.classList.add("moz-reader-content");
document.body.style.setProperty("display", "block");
document.head.innerHTML = "";
document.title = article.title;
});
styleContent = `
/* 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/. */
/* Avoid adding ID selector rules in this style sheet, since they could
* inadvertently match elements in the article content. */
:root {
--close-button-hover: #d94141;
}
body {
--toolbar-bgcolor: #fbfbfb;
--toolbar-border: #b5b5b5;
--toolbar-hover: #ebebeb;
--popup-bgcolor: #fbfbfb;
--popup-border: #b5b5b5;
--font-color: #4c4c4c;
--icon-fill: #808080;
/* light colours */
}
body.dark {
--toolbar-bgcolor: #2a2a2d;
--toolbar-border: #4B4A50;
--toolbar-hover: #737373;
--popup-bgcolor: #4b4a50;
--popup-border: #65646a;
--font-color: #fff;
--icon-fill: #fff;
/* dark colours */
}
body {
padding: 64px 51px;
}
body.loaded {
transition: color 0.4s, background-color 0.4s;
}
body.light {
color: #333333;
background-color: #ffffff;
}
body.dark {
color: #eeeeee;
background-color: #333333;
}
body.dark *::-moz-selection {
background-color: #FFFFFF;
color: #0095DD;
}
body.dark a::-moz-selection {
color: #DD4800;
}
body.sepia {
color: #5b4636;
background-color: #f4ecd8;
}
body.sans-serif,
body.sans-serif .remove-button {
font-family: Helvetica, Arial, sans-serif;
}
body.serif,
body.serif .remove-button {
font-family: Georgia, "Times New Roman", serif;
}
.container {
--font-size: 12;
max-width: 30em;
margin: 0 auto;
font-size: var(--font-size);
}
.container.content-width1 {
max-width: 20em;
}
.container.content-width2 {
max-width: 25em;
}
.container.content-width3 {
max-width: 30em;
}
.container.content-width4 {
max-width: 35em;
}
.container.content-width5 {
max-width: 40em;
}
.container.content-width6 {
max-width: 45em;
}
.container.content-width7 {
max-width: 50em;
}
.container.content-width8 {
max-width: 55em;
}
.container.content-width9 {
max-width: 60em;
}
/* Override some controls and content styles based on color scheme */
body.light > .container > .header > .domain {
border-bottom-color: #333333 !important;
}
body.sepia > .container > .header > .domain {
border-bottom-color: #5b4636 !important;
}
body.dark > .container > .header > .domain {
border-bottom-color: #eeeeee !important;
}
body.sepia > .container > .footer {
background-color: #dedad4 !important;
}
body.light blockquote {
border-inline-start: 2px solid #333333 !important;
}
body.sepia blockquote {
border-inline-start: 2px solid #5b4636 !important;
}
body.dark blockquote {
border-inline-start: 2px solid #eeeeee !important;
}
/* Add toolbar transition base on loaded class */
body.loaded .toolbar {
transition: transform 0.3s ease-out;
}
body:not(.loaded) .toolbar:-moz-locale-dir(ltr) {
transform: translateX(-100%);
}
body:not(.loaded) .toolbar:-moz-locale-dir(rtl) {
transform: translateX(100%);
}
.light-button {
color: #333333;
background-color: #ffffff;
}
.dark-button {
color: #eeeeee;
background-color: #333333;
}
.sepia-button {
color: #5b4636;
background-color: #f4ecd8;
}
.sans-serif-button {
font-family: Helvetica, Arial, sans-serif;
}
.serif-button {
font-family: Georgia, "Times New Roman", serif;
}
/* Loading/error message */
.reader-message {
margin-top: 40px;
display: none;
text-align: center;
width: 100%;
font-size: 0.9em;
}
/* Header */
.header {
text-align: start;
display: none;
}
.domain {
font-size: 0.9em;
line-height: 1.48em;
padding-bottom: 4px;
font-family: Helvetica, Arial, sans-serif;
text-decoration: none;
border-bottom: 1px solid;
color: #0095dd;
}
.header > h1 {
font-size: 1.6em;
line-height: 1.25em;
width: 100%;
margin: 30px 0;
padding: 0;
}
.header > .credits {
font-size: 0.9em;
line-height: 1.48em;
margin: 0 0 10px 0;
padding: 0;
font-style: italic;
}
.header > .meta-data {
font-size: 0.65em;
margin: 0 0 15px 0;
}
/*======= Controls toolbar =======*/
.toolbar {
font-family: Helvetica, Arial, sans-serif;
position: fixed;
height: 100%;
top: 0;
left: 0;
margin: 0;
padding: 0;
list-style: none;
background-color: var(--toolbar-bgcolor);
-moz-user-select: none;
border-right: 1px solid var(--toolbar-border);
z-index: 1;
}
.button {
display: block;
background-size: 24px 24px;
background-repeat: no-repeat;
color: #333;
background-color: var(--toolbar-bgcolor);
height: 40px;
padding: 0;
}
button {
-moz-context-properties: fill;
color: var(--font-color);
fill: var(--icon-fill);
}
.toolbar .button {
width: 40px;
background-position: center;
margin-right: -1px;
border-top: 0;
border-left: 0;
border-right: 1px solid var(--toolbar-border);
border-bottom: 1px solid var(--toolbar-border);
background-color: var(--toolbar-bgcolor);
}
.button[hidden] {
display: none;
}
.dropdown {
text-align: center;
list-style: none;
margin: 0;
padding: 0;
}
.dropdown li {
margin: 0;
padding: 0;
}
/*======= Popup =======*/
.dropdown-popup {
min-width: 300px;
text-align: start;
position: absolute;
left: 48px; /* offset to account for toolbar width */
z-index: 1000;
background-color: var(--popup-bgcolor);
visibility: hidden;
border-radius: 4px;
border: 1px solid var(--popup-border);
border-bottom-width: 0;
box-shadow: 0 1px 3px #c1c1c1;
}
.keep-open .dropdown-popup {
z-index: initial;
}
.dropdown-popup > hr {
display: none;
}
.open > .dropdown-popup {
visibility: visible;
}
.dropdown-arrow {
position: absolute;
top: 30px; /* offset arrow from top of popup */
left: -16px;
width: 16px;
height: 24px;
background-image: url("chrome://global/skin/reader/RM-Type-Controls-Arrow.svg");
display: block;
-moz-context-properties: fill, stroke;
fill: var(--popup-bgcolor);
stroke: var(--popup-border);
}
/*======= Font style popup =======*/
.font-type-buttons,
.font-size-buttons,
.color-scheme-buttons,
.content-width-buttons,
.line-height-buttons {
display: flex;
flex-direction: row;
}
.font-type-buttons > button:first-child {
border-top-left-radius: 3px;
}
.font-type-buttons > button:last-child {
border-top-right-radius: 3px;
}
.color-scheme-buttons > button:first-child {
border-bottom-left-radius: 3px;
}
.color-scheme-buttons > button:last-child {
border-bottom-right-radius: 3px;
}
.font-type-buttons > button,
.font-size-buttons > button,
.color-scheme-buttons > button,
.content-width-buttons > button,
.line-height-buttons > button {
text-align: center;
border: 0;
}
.font-type-buttons > button,
.font-size-buttons > button,
.content-width-buttons > button,
.line-height-buttons > button {
width: 50%;
background-color: transparent;
border-left: 1px solid var(--popup-border);
border-bottom: 1px solid var(--popup-border);
}
.color-scheme-buttons > button {
width: 33.33%;
font-size: 14px;
}
.color-scheme-buttons > .dark-button {
margin-top: -1px;
height: 61px;
}
.font-type-buttons > button:first-child,
.font-size-buttons > button:first-child,
.content-width-buttons > button:first-child,
.line-height-buttons > button:first-child {
border-left: 0;
}
.font-type-buttons > button {
display: inline-block;
font-size: 62px;
height: 100px;
}
.font-size-buttons > button,
.color-scheme-buttons > button,
.content-width-buttons > button,
.line-height-buttons > button {
height: 60px;
}
.font-type-buttons > button:active:hover,
.font-type-buttons > button.selected,
.color-scheme-buttons > button:active:hover,
.color-scheme-buttons > button.selected {
box-shadow: inset 0 -3px 0 0 #fc6420;
}
.font-type-buttons > button:active:hover,
.font-type-buttons > button.selected {
border-bottom: 1px solid #FC6420;
}
/* Make the serif button content the same size as the sans-serif button content. */
.font-type-buttons > button > .description {
font-size: 12px;
margin-top: -5px;
}
/* Font sizes are different per-platform, so we need custom CSS to line them up. */
.font-type-buttons > .sans-serif-button > .name {
margin-top: 2px;
}
.font-type-buttons > .sans-serif-button > .description {
margin-top: -4px;
}
.font-type-buttons > .serif-button > .name {
font-size: 63px;
}
.button:hover,
.font-size-buttons > button:hover,
.font-type-buttons > button:hover,
.content-width-buttons > button:hover,
.line-height-buttons > button:hover {
background-color: var(--toolbar-hover);
}
.dropdown.open,
.button:active,
.font-size-buttons > button:active,
.font-size-buttons > button.selected,
.content-width-buttons > button:active,
.content-width-buttons > button.selected,
.line-height-buttons > button:active,
.line-height-buttons > button.selected {
background-color: #dadada;
}
/* Only used on Android */
.font-size-sample {
display: none;
}
.minus-button,
.plus-button,
.content-width-minus-button,
.content-width-plus-button,
.line-height-minus-button,
.line-height-plus-button {
background-color: transparent;
border: 0;
background-size: 18px 18px;
background-repeat: no-repeat;
background-position: center;
}
/*======= Toolbar icons =======*/
.close-button {
background-image: url("chrome://global/skin/reader/RM-Close-24x24.svg");
height: 68px;
background-position: center 8px;
}
.close-button:hover {
fill: #fff;
background-color: var(--close-button-hover);
border-bottom: 1px solid var(--close-button-hover);
border-right: 1px solid var(--close-button-hover);
}
.close-button:hover:active {
background-color: #AE2325;
border-bottom: 1px solid #AE2325;
border-right: 1px solid #AE2325;
}
.style-button {
background-image: url("chrome://global/skin/reader/RM-Type-Controls-24x24.svg");
}
.minus-button {
background-image: url("chrome://global/skin/reader/RM-Minus-24x24.svg");
}
.plus-button {
background-image: url("chrome://global/skin/reader/RM-Plus-24x24.svg");
}
.content-width-minus-button {
background-size: 42px 16px;
background-image: url("chrome://global/skin/reader/RM-Content-Width-Minus-42x16.svg");
}
.content-width-plus-button {
background-size: 44px 16px;
background-image: url("chrome://global/skin/reader/RM-Content-Width-Plus-44x16.svg");
}
.line-height-minus-button {
background-size: 34px 14px;
background-image: url("chrome://global/skin/reader/RM-Line-Height-Minus-38x14.svg");
}
.line-height-plus-button {
background-size: 34px 24px;
background-image: url("chrome://global/skin/reader/RM-Line-Height-Plus-38x24.svg");
}
@media print {
.toolbar {
display: none !important;
}
}
/*======= Article content =======*/
/* Note that any class names from the original article that we want to match on
* must be added to CLASSES_TO_PRESERVE in ReaderMode.jsm, so that
* Readability.js doesn't strip them out */
.moz-reader-content {
display: none;
font-size: 1em;
line-height: 1.6em;
}
.moz-reader-content.line-height1 {
line-height: 1em;
}
.moz-reader-content.line-height2 {
line-height: 1.2em;
}
.moz-reader-content.line-height3 {
line-height: 1.4em;
}
.moz-reader-content.line-height4 {
line-height: 1.6em;
}
.moz-reader-content.line-height5 {
line-height: 1.8em;
}
.moz-reader-content.line-height6 {
line-height: 2.0em;
}
.moz-reader-content.line-height7 {
line-height: 2.2em;
}
.moz-reader-content.line-height8 {
line-height: 2.4em;
}
.moz-reader-content.line-height9 {
line-height: 2.6em;
}
@media print {
.moz-reader-content p,
.moz-reader-content code,
.moz-reader-content pre,
.moz-reader-content blockquote,
.moz-reader-content ul,
.moz-reader-content ol,
.moz-reader-content li,
.moz-reader-content figure,
.moz-reader-content .wp-caption {
margin: 0 0 10px 0 !important;
padding: 0 !important;
}
}
.moz-reader-content h1,
.moz-reader-content h2,
.moz-reader-content h3 {
font-weight: bold;
}
.moz-reader-content h1 {
font-size: 1.6em;
line-height: 1.25em;
}
.moz-reader-content h2 {
font-size: 1.2em;
line-height: 1.51em;
}
.moz-reader-content h3 {
font-size: 1em;
line-height: 1.66em;
}
.moz-reader-content a:link {
text-decoration: underline;
font-weight: normal;
}
.moz-reader-content a:link,
.moz-reader-content a:link:hover,
.moz-reader-content a:link:active {
color: #0095dd;
}
.moz-reader-content a:visited {
color: #c2e;
}
.moz-reader-content * {
max-width: 100%;
height: auto;
}
.moz-reader-content p,
.moz-reader-content p,
.moz-reader-content code,
.moz-reader-content pre,
.moz-reader-content blockquote,
.moz-reader-content ul,
.moz-reader-content ol,
.moz-reader-content li,
.moz-reader-content figure,
.moz-reader-content .wp-caption {
margin: -10px -10px 20px -10px;
padding: 10px;
border-radius: 5px;
}
.moz-reader-content li {
margin-bottom: 0;
}
.moz-reader-content li > ul,
.moz-reader-content li > ol {
margin-bottom: -10px;
}
.moz-reader-content p > img:only-child,
.moz-reader-content p > a:only-child > img:only-child,
.moz-reader-content .wp-caption img,
.moz-reader-content figure img {
display: block;
}
.moz-reader-content img[moz-reader-center] {
margin-left: auto;
margin-right: auto;
}
.moz-reader-content .caption,
.moz-reader-content .wp-caption-text
.moz-reader-content figcaption {
font-size: 0.9em;
line-height: 1.48em;
font-style: italic;
}
.moz-reader-content code,
.moz-reader-content pre {
white-space: pre-wrap;
}
.moz-reader-content blockquote {
padding: 0;
padding-inline-start: 16px;
}
.moz-reader-content ul,
.moz-reader-content ol {
padding: 0;
}
.moz-reader-content ul {
padding-inline-start: 30px;
list-style: disc;
}
.moz-reader-content ol {
padding-inline-start: 30px;
list-style: decimal;
}
table,
th,
td {
border: 1px solid currentColor;
border-collapse: collapse;
padding: 6px;
vertical-align: top;
}
table {
margin: 5px;
}
/* Visually hide (but don't display: none) screen reader elements */
.moz-reader-content .visually-hidden,
.moz-reader-content .visuallyhidden,
.moz-reader-content .sr-only {
display: inline-block;
width: 1px;
height: 1px;
margin: -1px;
overflow: hidden;
padding: 0;
border-width: 0;
}
/* Hide elements with common "hidden" class names */
.moz-reader-content .hidden,
.moz-reader-content .invisible {
display: none;
}
/* Enforce wordpress and similar emoji/smileys aren't sized to be full-width,
* see bug 1399616 for context. */
.moz-reader-content img.wp-smiley,
.moz-reader-content img.emoji {
display: inline-block;
border-width: 0;
/* height: auto is implied from .moz - reader - content * rule. */
width: 1em;
margin: 0 .07em;
padding: 0;
}
.reader-show-element {
display: initial;
} `;
/*eslint-env es6:false*/
/* 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 http://www.w3schools.com/dom/dom_nodetype.asp
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);
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.
// See http://blog.cdleary.com/2012/01/string-representation-in-spidermonkey/#ropes
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) {
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;
})(window);
/*eslint-env es6:false*/
/*
* 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._articleTitle = null;
this._articleByline = null;
this._articleDir = null;
this._articleSiteName = null;
this._attempts = [];
// Configurable options
this._debug = !!options.debug;
this._maxElemsToParse = options.maxElemsToParse || this.DEFAULT_MAX_ELEMS_TO_PARSE;
this._nbTopCandidates = options.nbTopCandidates || this.DEFAULT_N_TOP_CANDIDATES;
this._charThreshold = options.charThreshold || this.DEFAULT_CHAR_THRESHOLD;
this._classesToPreserve = this.CLASSES_TO_PRESERVE.concat(options.classesToPreserve || []);
this._keepClasses = !!options.keepClasses;
// Start with all flags set
this._flags = this.FLAG_STRIP_UNLIKELYS |
this.FLAG_WEIGHT_CLASSES |
this.FLAG_CLEAN_CONDITIONALLY;
var logEl;
// Control whether log messages are sent to the console
if (this._debug) {
logEl = function (e) {
var rv = e.nodeName + " ";
if (e.nodeType == e.TEXT_NODE) {
return rv + '("' + e.textContent + '")';
}
var classDesc = e.className && ("." + e.className.replace(/ /g, "."));
var elDesc = "";
if (e.id)
elDesc = "(#" + e.id + classDesc + ")";
else if (classDesc)
elDesc = "(" + classDesc + ")";
return rv + elDesc;
};
this.log = function () {
if (typeof dump !== "undefined") {
var msg = Array.prototype.map.call(arguments, function (x) {
return (x && x.nodeName) ? logEl(x) : x;
}).join(" ");
dump("Reader: (Readability) " + msg + "\n");
} else if (typeof console !== "undefined") {
var args = ["Reader: (Readability) "].concat(arguments);
console.log.apply(console, args);
}
};
} else {
this.log = function () { };
}
}
Readability.prototype = {
FLAG_STRIP_UNLIKELYS: 0x1,
FLAG_WEIGHT_CLASSES: 0x2,
FLAG_CLEAN_CONDITIONALLY: 0x4,
// https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
ELEMENT_NODE: 1,
TEXT_NODE: 3,
// Max number of nodes supported by this parser. Default: 0 (no limit)
DEFAULT_MAX_ELEMS_TO_PARSE: 0,
// The number of top candidates to consider when analysing how
// tight the competition is among candidates.
DEFAULT_N_TOP_CANDIDATES: 5,
// Element tags to score by default.
DEFAULT_TAGS_TO_SCORE: "section,h2,h3,h4,h5,h6,p,td,pre".toUpperCase().split(","),
// The default number of chars an article must have in order to return a result
DEFAULT_CHAR_THRESHOLD: 500,
// All of the regular expressions in use within readability.
// Defined up here so we don't instantiate them repeatedly in loops.
REGEXPS: {
// NOTE: These two regular expressions are duplicated in
// Readability-readerable.js. Please keep both copies in sync.
unlikelyCandidates: /-ad-|ai2html|banner|breadcrumbs|combx|comment|community|cover-wrap|disqus|extra|footer|gdpr|header|legends|menu|related|remark|replies|rss|shoutbox|sidebar|skyscraper|social|sponsor|supplemental|ad-break|agegate|pagination|pager|popup|yom-remote/i,
okMaybeItsACandidate: /and|article|body|column|content|main|shadow/i,
positive: /article|body|content|entry|hentry|h-entry|main|page|pagination|post|text|blog|story/i,
negative: /hidden|^hid$| hid$| hid |^hid |banner|combx|comment|com-|contact|foot|footer|footnote|gdpr|masthead|media|meta|outbrain|promo|related|scroll|share|shoutbox|sidebar|skyscraper|sponsor|shopping|tags|tool|widget/i,
extraneous: /print|archive|comment|discuss|e[\-]?mail|share|reply|all|login|sign|single|utility/i,
byline: /byline|author|dateline|writtenby|p-author/i,
replaceFonts: /<(\/?)font[^>]*>/gi,
normalize: /\s{2,}/g,
videos: /\/\/(www\.)?((dailymotion|youtube|youtube-nocookie|player\.vimeo|v\.qq)\.com|(archive|upload\.wikimedia)\.org|player\.twitch\.tv)/i,
shareElements: /(\b|_)(share|sharedaddy)(\b|_)/i,
nextLink: /(next|weiter|continue|>([^\|]|$)|»([^\|]|$))/i,
prevLink: /(prev|earl|old|new|<|«)/i,
whitespace: /^\s*$/,
hasContent: /\S$/,
},
DIV_TO_P_ELEMS: ["A", "BLOCKQUOTE", "DL", "DIV", "IMG", "OL", "P", "PRE", "TABLE", "UL", "SELECT"],
ALTER_TO_DIV_EXCEPTIONS: ["DIV", "ARTICLE", "SECTION", "P"],
PRESENTATIONAL_ATTRIBUTES: ["align", "background", "bgcolor", "border", "cellpadding", "cellspacing", "frame", "hspace", "rules", "style", "valign", "vspace"],
DEPRECATED_SIZE_ATTRIBUTE_ELEMS: ["TABLE", "TH", "TD", "HR", "PRE"],
// The commented out elements qualify as phrasing content but tend to be
// removed by readability when put into paragraphs, so we ignore them here.
PHRASING_ELEMS: [
// "CANVAS", "IFRAME", "SVG", "VIDEO",
"ABBR", "AUDIO", "B", "BDO", "BR", "BUTTON", "CITE", "CODE", "DATA",
"DATALIST", "DFN", "EM", "EMBED", "I", "IMG", "INPUT", "KBD", "LABEL",
"MARK", "MATH", "METER", "NOSCRIPT", "OBJECT", "OUTPUT", "PROGRESS", "Q",
"RUBY", "SAMP", "SCRIPT", "SELECT", "SMALL", "SPAN", "STRONG", "SUB",
"SUP", "TEXTAREA", "TIME", "VAR", "WBR"
],
// These are the classes that readability sets itself.
CLASSES_TO_PRESERVE: ["page"],
/**
* Run any post-process modifications to article content as necessary.
*
* @param Element
* @return void
**/
_postProcessContent: function (articleContent) {
// Readability cannot open relative uris so we convert them to absolute uris.
this._fixRelativeUris(articleContent);
if (!this._keepClasses) {
// Remove classes.
this._cleanClasses(articleContent);
}
},
/**
* Iterates over a NodeList, calls `filterFn` for each node and removes node
* if function returned `true`.
*
* If function is not passed, removes all the nodes in node list.
*
* @param NodeList nodeList The nodes to operate on
* @param Function filterFn the function to use as a filter
* @return void
*/
_removeNodes: function (nodeList, filterFn) {
for (var i = nodeList.length - 1; i >= 0; i--) {
var node = nodeList[i];
var parentNode = node.parentNode;
if (parentNode) {
if (!filterFn || filterFn.call(this, node, i, nodeList)) {
parentNode.removeChild(node);
}
}
}
},
/**
* Iterates over a NodeList, and calls _setNodeTag for each node.
*
* @param NodeList nodeList The nodes to operate on
* @param String newTagName the new tag name to use
* @return void
*/
_replaceNodeTags: function (nodeList, newTagName) {
for (var i = nodeList.length - 1; i >= 0; i--) {
var node = nodeList[i];
this._setNodeTag(node, newTagName);
}
},
/**
* Iterate over a NodeList, which doesn't natively fully implement the Array
* interface.
*
* For convenience, the current object context is applied to the provided
* iterate function.
*
* @param NodeList nodeList The NodeList.
* @param Function fn The iterate function.
* @return void
*/
_forEachNode: function (nodeList, fn) {
Array.prototype.forEach.call(nodeList, fn, this);
},
/**
* Iterate over a NodeList, return true if any of the provided iterate
* function calls returns true, false otherwise.
*
* For convenience, the current object context is applied to the
* provided iterate function.
*
* @param NodeList nodeList The NodeList.
* @param Function fn The iterate function.
* @return Boolean
*/
_someNode: function (nodeList, fn) {
return Array.prototype.some.call(nodeList, fn, this);
},
/**
* Iterate over a NodeList, return true if all of the provided iterate
* function calls return true, false otherwise.
*
* For convenience, the current object context is applied to the
* provided iterate function.
*
* @param NodeList nodeList The NodeList.
* @param Function fn The iterate function.
* @return Boolean
*/
_everyNode: function (nodeList, fn) {
return Array.prototype.every.call(nodeList, fn, this);
},
/**
* Concat all nodelists passed as arguments.
*
* @return ...NodeList
* @return Array
*/
_concatNodeLists: function () {
var slice = Array.prototype.slice;
var args = slice.call(arguments);
var nodeLists = args.map(function (list) {
return slice.call(list);
});
return Array.prototype.concat.apply([], nodeLists);
},
_getAllNodesWithTag: function (node, tagNames) {
if (node.querySelectorAll) {
return node.querySelectorAll(tagNames.join(","));
}
return [].concat.apply([], tagNames.map(function (tag) {
var collection = node.getElementsByTagName(tag);
return Array.isArray(collection) ? collection : Array.from(collection);
}));
},
/**
* Removes the class="" attribute from every element in the given
* subtree, except those that match CLASSES_TO_PRESERVE and
* the classesToPreserve array from the options object.
*
* @param Element
* @return void
*/
_cleanClasses: function (node) {
var classesToPreserve = this._classesToPreserve;
var className = (node.getAttribute("class") || "")
.split(/\s+/)
.filter(function (cls) {
return classesToPreserve.indexOf(cls) != -1;
})
.join(" ");
if (className) {
node.setAttribute("class", className);
} else {
node.removeAttribute("class");
}
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) {
// Replace links with javascript: URIs with text content, since
// they won't work after scripts have been removed from the page.
if (href.indexOf("javascript:") === 0) {
var text = this._doc.createTextNode(link.textContent);
link.parentNode.replaceChild(text, link);
} else {
link.setAttribute("href", toAbsoluteURI(href));
}
}
});
var imgs = this._getAllNodesWithTag(articleContent, ["img"]);
this._forEachNode(imgs, function (img) {
var src = img.getAttribute("src");
if (src) {
img.setAttribute("src", toAbsoluteURI(src));
}
});
},
/**
* Get the article title as an H1.
*
* @return void
**/
_getArticleTitle: function () {
var doc = this._doc;
var curTitle = "";
var origTitle = "";
try {
curTitle = origTitle = doc.title.trim();
// If they had an element with id "title" in their HTML
if (typeof curTitle !== "string")
curTitle = origTitle = this._getInnerText(doc.getElementsByTagName("title")[0]);
} catch (e) {/* ignore exceptions setting the title. */ }
var titleHadHierarchicalSeparators = false;
function wordCount(str) {
return str.split(/\s+/).length;
}
// If there's a separator in the title, first remove the final part
if ((/ [\|\-\\\/>»] /).test(curTitle)) {
titleHadHierarchicalSeparators = / [\\\/>»] /.test(curTitle);
curTitle = origTitle.replace(/(.*)[\|\-\\\/>»] .*/gi, "$1");
// If the resulting title is too short (3 words or fewer), remove
// the first part instead:
if (wordCount(curTitle) < 3)
curTitle = origTitle.replace(/[^\|\-\\\/>»]*[\|\-\\\/>»](.*)/gi, "$1");
} else if (curTitle.indexOf(": ") !== -1) {
// Check if we have an heading containing this exact string, so we
// could assume it's the full title.
var headings = this._concatNodeLists(
doc.getElementsByTagName("h1"),
doc.getElementsByTagName("h2")
);
var trimmedTitle = curTitle.trim();
var match = this._someNode(headings, function (heading) {
return heading.textContent.trim() === trimmedTitle;
});
// If we don't, let's extract the title out of the original title string.
if (!match) {
curTitle = origTitle.substring(origTitle.lastIndexOf(":") + 1);
// If the title is now too short, try the first colon instead:
if (wordCount(curTitle) < 3) {
curTitle = origTitle.substring(origTitle.indexOf(":") + 1);
// But if we have too many words before the colon there's something weird
// with the titles and the H tags so let's just use the original title instead
} else if (wordCount(origTitle.substr(0, origTitle.indexOf(":"))) > 5) {
curTitle = origTitle;
}
}
} 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(doc.getElementsByTagName("style"));
if (doc.body) {
this._replaceBrs(doc.body);
}
this._replaceNodeTags(doc.getElementsByTagName("font"), "SPAN");
},
/**
* Finds the next element, starting from the given node, and ignoring
* whitespace in between. If the given node is an element, the same node is
* returned.
*/
_nextElement: function (node) {
var next = node;
while (next
&& (next.nodeType != this.ELEMENT_NODE)
&& this.REGEXPS.whitespace.test(next.textContent)) {
next = next.nextSibling;
}
return next;
},
/**
* Replaces 2 or more successive <br> elements with a single <p>.
* Whitespace between <br> elements are ignored. For example:
* <div>foo<br>bar<br> <br><br>abc</div>
* will become:
* <div>foo<br>bar<p>abc</p></div>
*/
_replaceBrs: function (elem) {
this._forEachNode(this._getAllNodesWithTag(elem, ["br"]), function (br) {
var next = br.nextSibling;
// Whether 2 or more <br> elements have been found and replaced with a
// <p> block.
var replaced = false;
// If we find a <br> chain, remove the <br>s until we hit another element
// or non-whitespace. This leaves behind the first <br> in the chain
// (which will be replaced with a <p> later).
while ((next = this._nextElement(next)) && (next.tagName == "BR")) {
replaced = true;
var brSibling = next.nextSibling;
next.parentNode.removeChild(next);
next = brSibling;
}
// If we removed a <br> chain, replace the remaining <br> with a <p>. Add
// all sibling nodes as children of the <p> until we hit another <br>
// chain.
if (replaced) {
var p = this._doc.createElement("p");
br.parentNode.replaceChild(p, br);
next = p.nextSibling;
while (next) {
// If we've hit another <br><br>, we're done adding children to this <p>.
if (next.tagName == "BR") {
var nextElem = this._nextElement(next.nextSibling);
if (nextElem && nextElem.tagName == "BR")
break;
}
if (!this._isPhrasingContent(next))
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 (node.__JSDOMParser__) {
node.localName = tag.toLowerCase();
node.tagName = tag.toUpperCase();
return node;
}
var replacement = node.ownerDocument.createElement(tag);
while (node.firstChild) {
replacement.appendChild(node.firstChild);
}
node.parentNode.replaceChild(replacement, node);
if (node.readability)
replacement.readability = node.readability;
for (var i = 0; i < node.attributes.length; i++) {
try {
replacement.setAttribute(node.attributes[i].name, node.attributes[i].value);
} catch (ex) {
/* it's possible for setAttribute() to throw if the attribute name
* isn't a valid XML Name. Such attributes can however be parsed from
* source in HTML docs, see https://github.com/whatwg/html/issues/4275,
* so we can hit them here and then throw. We don't care about such
* attributes so we ignore them.
*/
}
}
return replacement;
},
/**
* Prepare the article node for display. Clean out any inline styles,
* iframes, forms, strip extraneous <p> tags, etc.
*
* @param Element
* @return void
**/
_prepArticle: function (articleContent) {
this._cleanStyles(articleContent);
// Check for data tables before we continue, to avoid removing items in
// those tables, which will often be isolated even though they're
// visually linked to other content-ful elements (text, images, etc.).
this._markDataTables(articleContent);
this._fixLazyImages(articleContent);
// Clean out junk from the article content
this._cleanConditionally(articleContent, "form");
this._cleanConditionally(articleContent, "fieldset");
this._clean(articleContent, "object");
this._clean(articleContent, "embed");
this._clean(articleContent, "h1");
this._clean(articleContent, "footer");
this._clean(articleContent, "link");
this._clean(articleContent, "aside");
// Clean out elements with little content that have "share" in their id/class combinations from final top candidates,
// which means we don't remove the top candidates even they have "share".
var shareElementThreshold = this.DEFAULT_CHAR_THRESHOLD;
this._forEachNode(articleContent.children, function (topCandidate) {
this._cleanMatchedNodes(topCandidate, function (node, matchString) {
return this.REGEXPS.shareElements.test(matchString) && node.textContent.length < shareElementThreshold;
});
});
// If there is only one h2 and its text content substantially equals article title,
// they are probably using it as a header and not a subheader,
// so remove it since we already extract the title separately.
var h2 = articleContent.getElementsByTagName("h2");
if (h2.length === 1) {
var lengthSimilarRate = (h2[0].textContent.length - this._articleTitle.length) / this._articleTitle.length;
if (Math.abs(lengthSimilarRate) < 0.5) {
var titlesMatch = false;
if (lengthSimilarRate > 0) {
titlesMatch = h2[0].textContent.includes(this._articleTitle);
} else {
titlesMatch = this._articleTitle.includes(h2[0].textContent);
}
if (titlesMatch) {
this._clean(articleContent, "h2");
}
}
}
this._clean(articleContent, "iframe");
this._clean(articleContent, "input");
this._clean(articleContent, "textarea");
this._clean(articleContent, "select");
this._clean(articleContent, "button");
this._cleanHeaders(articleContent);
// Do these last as the previous stuff may have removed junk
// that will affect these
this._cleanConditionally(articleContent, "table");
this._cleanConditionally(articleContent, "ul");
this._cleanConditionally(articleContent, "div");
// Remove extra paragraphs
this._removeNodes(articleContent.getElementsByTagName("p"), function (paragraph) {
var imgCount = paragraph.getElementsByTagName("img").length;
var embedCount = paragraph.getElementsByTagName("embed").length;
var objectCount = paragraph.getElementsByTagName("object").length;
// At this point, nasty iframes have been removed, only remain embedded video ones.
var iframeCount = paragraph.getElementsByTagName("iframe").length;
var totalCount = imgCount + embedCount + objectCount + iframeCount;
return totalCount === 0 && !this._getInnerText(paragraph, false);
});
this._forEachNode(this._getAllNodesWithTag(articleContent, ["br"]), function (br) {
var next = this._nextElement(br.nextSibling);
if (next && next.tagName == "P")
br.parentNode.removeChild(br);
});
// Remove single-cell tables
this._forEachNode(this._getAllNodesWithTag(articleContent, ["table"]), function (table) {
var tbody = this._hasSingleTagInsideElement(table, "TBODY") ? table.firstElementChild : table;
if (this._hasSingleTagInsideElement(tbody, "TR")) {
var row = tbody.firstElementChild;
if (this._hasSingleTagInsideElement(row, "TD")) {
var cell = row.firstElementChild;
cell = this._setNodeTag(cell, this._everyNode(cell.childNodes, this._isPhrasingContent) ? "P" : "DIV");
table.parentNode.replaceChild(cell, table);
}
}
});
},
/**
* Initialize a node with the readability object. Also checks the
* className/id for special names to add to its score.
*
* @param Element
* @return void
**/
_initializeNode: function (node) {
node.readability = { "contentScore": 0 };
switch (node.tagName) {
case "DIV":
node.readability.contentScore += 5;
break;
case "PRE":
case "TD":
case "BLOCKQUOTE":
node.readability.contentScore += 3;
break;
case "ADDRESS":
case "OL":
case "UL":
case "DL":
case "DD":
case "DT":
case "LI":
case "FORM":
node.readability.contentScore -= 3;
break;
case "H1":
case "H2":
case "H3":
case "H4":
case "H5":
case "H6":
case "TH":
node.readability.contentScore -= 5;
break;
}
node.readability.contentScore += this._getClassWeight(node);
},
_removeAndGetNext: function (node) {
var nextNode = this._getNextNode(node, true);
node.parentNode.removeChild(node);
return nextNode;
},
/**
* Traverse the DOM from node to node, starting at the node passed in.
* Pass true for the second parameter to indicate this node itself
* (and its kids) are going away, and we want the next node over.
*
* Calling this in a loop will traverse the DOM depth-first.
*/
_getNextNode: function (node, ignoreSelfAndKids) {
// First check for kids if those aren't being ignored
if (!ignoreSelfAndKids && node.firstElementChild) {
return node.firstElementChild;
}
// Then for siblings...
if (node.nextElementSibling) {
return node.nextElementSibling;
}
// And finally, move up the parent chain *and* find a sibling
// (because this is depth-first traversal, we will have already
// seen the parent nodes themselves).
do {
node = node.parentNode;
} while (node && !node.nextElementSibling);
return node && node.nextElementSibling;
},
_checkByline: function (node, matchString) {
if (this._articleByline) {
return false;
}
if (node.getAttribute !== undefined) {
var rel = node.getAttribute("rel");
var itemprop = node.getAttribute("itemprop");
}
if ((rel === "author" || (itemprop && itemprop.indexOf("author") !== -1) || this.REGEXPS.byline.test(matchString)) && this._isValidByline(node.textContent)) {
this._articleByline = node.textContent.trim();
return true;
}
return false;
},
_getNodeAncestors: function (node, maxDepth) {
maxDepth = maxDepth || 0;
var i = 0, ancestors = [];
while (node.parentNode) {
ancestors.push(node.parentNode);
if (maxDepth && ++i === maxDepth)
break;
node = node.parentNode;
}
return ancestors;
},
/***
* grabArticle - Using a variety of metrics (content score, classname, element types), find the content that is
* most likely to be the stuff a user wants to read. Then return it wrapped up in a div.
*
* @param page a document to run upon. Needs to be a full document, complete with body.
* @return Element
**/
_grabArticle: function (page) {
this.log("**** grabArticle ****");
var doc = this._doc;
var isPaging = (page !== null ? true : false);
page = page ? page : this._doc.body;
// We can't grab an article if we don't have a page!
if (!page) {
this.log("No body found in document. Abort.");
return null;
}
var pageCacheHtml = page.innerHTML;
while (true) {
var stripUnlikelyCandidates = this._flagIsActive(this.FLAG_STRIP_UNLIKELYS);
// First, node prepping. Trash nodes that look cruddy (like ones with the
// class name "comment", etc), and turn divs into P tags where they have been
// used inappropriately (as in, where they contain no other block level elements.)
var elementsToScore = [];
var node = this._doc.documentElement;
while (node) {
var matchString = node.className + " " + node.id;
if (!this._isProbablyVisible(node)) {
this.log("Removing hidden node - " + matchString);
node = this._removeAndGetNext(node);
continue;
}
// Check to see if this node is a byline, and remove it if it is.
if (this._checkByline(node, matchString)) {
node = this._removeAndGetNext(node);
continue;
}
// Remove unlikely candidates
if (stripUnlikelyCandidates) {
if (this.REGEXPS.unlikelyCandidates.test(matchString) &&
!this.REGEXPS.okMaybeItsACandidate.test(matchString) &&
!this._hasAncestorTag(node, "table") &&
node.tagName !== "BODY" &&
node.tagName !== "A") {
this.log("Removing unlikely candidate - " + matchString);
node = this._removeAndGetNext(node);
continue;
}
}
// 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, 3);
if (ancestors.length === 0)
return;
var contentScore = 0;
// Add a point for the paragraph itself as a base.
contentScore += 1;
// Add points for any commas within this paragraph.
contentScore += innerText.split(",").length;
// For every 100 characters in this paragraph, add another point. Up to 3 points.
contentScore += Math.min(Math.floor(innerText.length / 100), 3);
// Initialize and score ancestors.
this._forEachNode(ancestors, function (ancestor, level) {
if (!ancestor.tagName || !ancestor.parentNode || typeof (ancestor.parentNode.tagName) === "undefined")
return;
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:
var kids = page.childNodes;
while (kids.length) {
this.log("Moving child out:", kids[0]);
topCandidate.appendChild(kids[0]);
}
page.appendChild(topCandidate);
this._initializeNode(topCandidate);
} else if (topCandidate) {
// Find a better top candidate node if it contains (at least three) nodes which belong to `topCandidates` array
// and whose scores are quite closed with current `topCandidate` node.
var alternativeCandidateAncestors = [];
for (var i = 1; i < topCandidates.length; i++) {
if (topCandidates[i].readability.contentScore / topCandidate.readability.contentScore >= 0.75) {
alternativeCandidateAncestors.push(this._getNodeAncestors(topCandidates[i]));
}
}
var MINIMUM_TOPCANDIDATES = 3;
if (alternativeCandidateAncestors.length >= MINIMUM_TOPCANDIDATES) {
parentOfTopCandidate = topCandidate.parentNode;
while (parentOfTopCandidate.tagName !== "BODY") {
var listsContainingThisAncestor = 0;
for (var ancestorIndex = 0; ancestorIndex < alternativeCandidateAncestors.length && listsContainingThisAncestor < MINIMUM_TOPCANDIDATES; ancestorIndex++) {
listsContainingThisAncestor += Number(alternativeCandidateAncestors[ancestorIndex].includes(parentOfTopCandidate));
}
if (listsContainingThisAncestor >= MINIMUM_TOPCANDIDATES) {
topCandidate = parentOfTopCandidate;
break;
}
parentOfTopCandidate = parentOfTopCandidate.parentNode;
}
}
if (!topCandidate.readability) {
this._initializeNode(topCandidate);
}
// 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);
// siblings is a reference to the children array, and
// sibling is removed from the array when we call appendChild().
// As a result, we must revisit this index since the nodes
// have been shifted.
s -= 1;
sl -= 1;
}
}
if (this._debug)
this.log("Article content pre-prep: " + articleContent.innerHTML);
// So we have all of the content that we need. Now we clean it up for presentation.
this._prepArticle(articleContent);
if (this._debug)
this.log("Article content post-prep: " + articleContent.innerHTML);
if (neededToCreateTopCandidate) {
// We already created a fake div thing, and there wouldn't have been any siblings left
// for the previous loop, so there's no point trying to create a new div, and then
// move all the children over. Just assign IDs and class names here. No need to append
// because that already happened anyway.
topCandidate.id = "readability-page-1";
topCandidate.className = "page";
} else {
var div = doc.createElement("DIV");
div.id = "readability-page-1";
div.className = "page";
var children = articleContent.childNodes;
while (children.length) {
div.appendChild(children[0]);
}
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;
},
/**
* Attempts to get excerpt and byline metadata for the article.
*
* @return Object with optional "excerpt" and "byline" properties
*/
_getArticleMetadata: function () {
var metadata = {};
var values = {};
var metaElements = this._doc.getElementsByTagName("meta");
// property is a space-separated list of values
var propertyPattern = /\s*(dc|dcterm|og|twitter)\s*:\s*(author|creator|description|title|site_name)\s*/gi;
// name is a single value
var namePattern = /^\s*(?:(dc|dcterm|og|twitter|weibo:(article|webpage))\s*[\.:]\s*)?(author|creator|description|title|site_name)\s*$/i;
// Find description tags.
this._forEachNode(metaElements, function (element) {
var elementName = element.getAttribute("name");
var elementProperty = element.getAttribute("property");
var content = element.getAttribute("content");
if (!content) {
return;
}
var matches = null;
var name = null;
if (elementProperty) {
matches = elementProperty.match(propertyPattern);
if (matches) {
for (var i = matches.length - 1; i >= 0; i--) {
// Convert to lowercase, and remove any whitespace
// so we can match below.
name = matches[i].toLowerCase().replace(/\s/g, "");
// multiple authors
values[name] = content.trim();
}
}
}
if (!matches && elementName && namePattern.test(elementName)) {
name = elementName;
if (content) {
// Convert to lowercase, remove any whitespace, and convert dots
// to colons so we can match below.
name = name.toLowerCase().replace(/\s/g, "").replace(/\./g, ":");
values[name] = content.trim();
}
}
});
// get title
metadata.title = values["dc:title"] ||
values["dcterm:title"] ||
values["og:title"] ||
values["weibo:article:title"] ||
values["weibo:webpage:title"] ||
values["title"] ||
values["twitter:title"];
if (!metadata.title) {
metadata.title = this._getArticleTitle();
}
// get author
metadata.byline = values["dc:creator"] ||
values["dcterm:creator"] ||
values["author"];
// get description
metadata.excerpt = values["dc:description"] ||
values["dcterm:description"] ||
values["og:description"] ||
values["weibo:article:description"] ||
values["weibo:webpage:description"] ||
values["description"] ||
values["twitter:description"];
// get site name
metadata.siteName = values["og:site_name"];
return metadata;
},
/**
* Removes script tags from the document.
*
* @param Element
**/
_removeScripts: function (doc) {
this._removeNodes(doc.getElementsByTagName("script"), function (scriptNode) {
scriptNode.nodeValue = "";
scriptNode.removeAttribute("src");
return true;
});
this._removeNodes(doc.getElementsByTagName("noscript"));
},
/**
* Check if this node has only whitespace and a single element with given tag
* Returns false if the DIV node contains non-empty text nodes
* or if it contains no element with given tag or more than 1 element.
*
* @param Element
* @param string tag of child element
**/
_hasSingleTagInsideElement: function (element, tag) {
// There should be exactly 1 element child with given tag
if (element.children.length != 1 || element.children[0].tagName !== tag) {
return false;
}
// And there should be no text nodes with real content
return !this._someNode(element.childNodes, function (node) {
return node.nodeType === this.TEXT_NODE &&
this.REGEXPS.hasContent.test(node.textContent);
});
},
_isElementWithoutContent: function (node) {
return node.nodeType === this.ELEMENT_NODE &&
node.textContent.trim().length == 0 &&
(node.children.length == 0 ||
node.children.length == node.getElementsByTagName("br").length + node.getElementsByTagName("hr").length);
},
/**
* Determine whether element has any children block level elements.
*
* @param Element
*/
_hasChildBlockElement: function (element) {
return this._someNode(element.childNodes, function (node) {
return this.DIV_TO_P_ELEMS.indexOf(node.tagName) !== -1 ||
this._hasChildBlockElement(node);
});
},
/***
* Determine if a node qualifies as phrasing content.
* https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content
**/
_isPhrasingContent: function (node) {
return node.nodeType === this.TEXT_NODE || this.PHRASING_ELEMS.indexOf(node.tagName) !== -1 ||
((node.tagName === "A" || node.tagName === "DEL" || node.tagName === "INS") &&
this._everyNode(node.childNodes, this._isPhrasingContent));
},
_isWhitespace: function (node) {
return (node.nodeType === this.TEXT_NODE && node.textContent.trim().length === 0) ||
(node.nodeType === this.ELEMENT_NODE && node.tagName === "BR");
},
/**
* Get the inner text of a node - cross browser compatibly.
* This also strips out any excess whitespace to be found.
*
* @param Element
* @param Boolean normalizeSpaces (default: true)
* @return string
**/
_getInnerText: function (e, normalizeSpaces) {
normalizeSpaces = (typeof normalizeSpaces === "undefined") ? true : normalizeSpaces;
var textContent = e.textContent.trim();
if (normalizeSpaces) {
return textContent.replace(this.REGEXPS.normalize, " ");
}
return textContent;
},
/**
* Get the number of times a string s appears in the node e.
*
* @param Element
* @param string - what to split on. Default is ","
* @return number (integer)
**/
_getCharCount: function (e, s) {
s = s || ",";
return this._getInnerText(e).split(s).length - 1;
},
/**
* Remove the style attribute on every e and under.
* TODO: Test if getElementsByTagName(*) is faster.
*
* @param Element
* @return void
**/
_cleanStyles: function (e) {
if (!e || e.tagName.toLowerCase() === "svg")
return;
// Remove `style` and deprecated presentational attributes
for (var i = 0; i < this.PRESENTATIONAL_ATTRIBUTES.length; i++) {
e.removeAttribute(this.PRESENTATIONAL_ATTRIBUTES[i]);
}
if (this.DEPRECATED_SIZE_ATTRIBUTE_ELEMS.indexOf(e.tagName) !== -1) {
e.removeAttribute("width");
e.removeAttribute("height");
}
var cur = e.firstElementChild;
while (cur !== null) {
this._cleanStyles(cur);
cur = cur.nextElementSibling;
}
},
/**
* Get the density of links as a percentage of the content
* This is the amount of text that is inside a link divided by the total text in the node.
*
* @param Element
* @return number (float)
**/
_getLinkDensity: function (element) {
var textLength = this._getInnerText(element).length;
if (textLength === 0)
return 0;
var linkLength = 0;
// XXX implement _reduceNodeList?
this._forEachNode(element.getElementsByTagName("a"), function (linkNode) {
linkLength += this._getInnerText(linkNode).length;
});
return linkLength / textLength;
},
/**
* Get an elements class/id weight. Uses regular expressions to tell if this
* element looks good or bad.
*
* @param Element
* @return number (Integer)
**/
_getClassWeight: function (e) {
if (!this._flagIsActive(this.FLAG_WEIGHT_CLASSES))
return 0;
var weight = 0;
// Look for a special classname
if (typeof (e.className) === "string" && e.className !== "") {
if (this.REGEXPS.negative.test(e.className))
weight -= 25;
if (this.REGEXPS.positive.test(e.className))
weight += 25;
}
// Look for a special ID
if (typeof (e.id) === "string" && e.id !== "") {
if (this.REGEXPS.negative.test(e.id))
weight -= 25;
if (this.REGEXPS.positive.test(e.id))
weight += 25;
}
return weight;
},
/**
* Clean a node of all elements of type "tag".
* (Unless it's a youtube/vimeo video. People love movies.)
*
* @param Element
* @param string tag to clean
* @return void
**/
_clean: function (e, tag) {
var isEmbed = ["object", "embed", "iframe"].indexOf(tag) !== -1;
this._removeNodes(e.getElementsByTagName(tag), function (element) {
// Allow youtube and vimeo videos through as people usually want to see those.
if (isEmbed) {
// First, check the elements attributes to see if any of them contain youtube or vimeo
for (var i = 0; i < element.attributes.length; i++) {
if (this.REGEXPS.videos.test(element.attributes[i].value)) {
return false;
}
}
// For embed with <object> tag, check inner HTML as well.
if (element.tagName === "object" && this.REGEXPS.videos.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://dxr.mozilla.org/mozilla-central/rev/71224049c0b52ab190564d3ea0eab089a159a4cf/accessible/html/HTMLTableAccessible.cpp#920
*/
_markDataTables: function (root) {
var tables = root.getElementsByTagName("table");
for (var i = 0; i < tables.length; i++) {
var table = tables[i];
var role = table.getAttribute("role");
if (role == "presentation") {
table._readabilityDataTable = false;
continue;
}
var datatable = table.getAttribute("datatable");
if (datatable == "0") {
table._readabilityDataTable = false;
continue;
}
var summary = table.getAttribute("summary");
if (summary) {
table._readabilityDataTable = true;
continue;
}
var caption = table.getElementsByTagName("caption")[0];
if (caption && caption.childNodes.length > 0) {
table._readabilityDataTable = true;
continue;
}
// If the table has a descendant with any of these tags, consider a data table:
var dataTableDescendants = ["col", "colgroup", "tfoot", "thead", "th"];
var descendantExists = function (tag) {
return !!table.getElementsByTagName(tag)[0];
};
if (dataTableDescendants.some(descendantExists)) {
this.log("Data table because found data-y descendant");
table._readabilityDataTable = true;
continue;
}
// Nested tables indicate a layout table:
if (table.getElementsByTagName("table")[0]) {
table._readabilityDataTable = false;
continue;
}
var sizeInfo = this._getRowAndColumnCount(table);
if (sizeInfo.rows >= 10 || sizeInfo.columns > 4) {
table._readabilityDataTable = true;
continue;
}
// Now just go by size entirely:
table._readabilityDataTable = sizeInfo.rows * sizeInfo.columns > 10;
}
},
/* convert images and figures that have properties like data-src into images that can be loaded without JS */
_fixLazyImages: function (root) {
this._forEachNode(this._getAllNodesWithTag(root, ["img", "picture", "figure"]), function (elem) {
// also check for "null" to work around https://github.com/jsdom/jsdom/issues/2580
if ((!elem.src && (!elem.srcset || elem.srcset == "null")) || elem.className.toLowerCase().indexOf("lazy") !== -1) {
for (var i = 0; i < elem.attributes.length; i++) {
var attr = elem.attributes[i];
if (attr.name === "src" || attr.name === "srcset") {
continue;
}
var copyTo = null;
if (/\.(jpg|jpeg|png|webp)\s+\d/.test(attr.value)) {
copyTo = "srcset";
} else if (/^\s*\S+\.(jpg|jpeg|png|webp)\S*\s*$/.test(attr.value)) {
copyTo = "src";
}
if (copyTo) {
//if this is an img or picture, set the attribute directly
if (elem.tagName === "IMG" || elem.tagName === "PICTURE") {
elem.setAttribute(copyTo, attr.value);
} else if (elem.tagName === "FIGURE" && !this._getAllNodesWithTag(elem, ["img", "picture"]).length) {
//if the item is a <figure> that does not contain an image or picture, create one and place it inside the figure
//see the nytimes-3 testcase for an example
var img = this._doc.createElement("img");
img.setAttribute(copyTo, attr.value);
elem.appendChild(img);
}
}
}
}
});
},
/**
* Clean an element of all tags of type "tag" if they look fishy.
* "Fishy" is an algorithm based on content length, classnames, link density, number of images & embeds, etc.
*
* @return void
**/
_cleanConditionally: function (e, tag) {
if (!this._flagIsActive(this.FLAG_CLEAN_CONDITIONALLY))
return;
var isList = tag === "ul" || tag === "ol";
// Gather counts for other typical elements embedded within.
// Traverse backwards so we can remove nodes at the same time
// without effecting the traversal.
//
// TODO: Consider taking into account original contentScore here.
this._removeNodes(e.getElementsByTagName(tag), function (node) {
// First check if this node IS data table, in which case don't remove it.
var isDataTable = function (t) {
return t._readabilityDataTable;
};
if (tag === "table" && isDataTable(node)) {
return false;
}
// Next check if we're inside a data table, in which case don't remove it as well.
if (this._hasAncestorTag(node, "table", -1, isDataTable)) {
return false;
}
var weight = this._getClassWeight(node);
var contentScore = 0;
this.log("Cleaning Conditionally", node);
if (weight + contentScore < 0) {
return true;
}
if (this._getCharCount(node, ",") < 10) {
// If there are not very many commas, and the number of
// non-paragraph elements is more than paragraphs or other
// ominous signs, remove the element.
var p = node.getElementsByTagName("p").length;
var img = node.getElementsByTagName("img").length;
var li = node.getElementsByTagName("li").length - 100;
var input = node.getElementsByTagName("input").length;
var embedCount = 0;
var embeds = this._concatNodeLists(
node.getElementsByTagName("object"),
node.getElementsByTagName("embed"),
node.getElementsByTagName("iframe"));
for (var i = 0; i < embeds.length; i++) {
// If this embed has attribute that matches video regex, don't delete it.
for (var j = 0; j < embeds[i].attributes.length; j++) {
if (this.REGEXPS.videos.test(embeds[i].attributes[j].value)) {
return false;
}
}
// For embed with <object> tag, check inner HTML as well.
if (embeds[i].tagName === "object" && this.REGEXPS.videos.test(embeds[i].innerHTML)) {
return false;
}
embedCount++;
}
var linkDensity = this._getLinkDensity(node);
var contentLength = this._getInnerText(node).length;
var haveToRemove =
(img > 1 && p / img < 0.5 && !this._hasAncestorTag(node, "figure")) ||
(!isList && li > p) ||
(input > Math.floor(p / 3)) ||
(!isList && contentLength < 25 && (img === 0 || img > 2) && !this._hasAncestorTag(node, "figure")) ||
(!isList && weight < 25 && linkDensity > 0.2) ||
(weight >= 25 && linkDensity > 0.5) ||
((embedCount === 1 && contentLength < 75) || embedCount > 1);
return haveToRemove;
}
return false;
});
},
/**
* Clean out elements that match the specified conditions
*
* @param Element
* @param Function determines whether a node should be removed
* @return void
**/
_cleanMatchedNodes: function (e, filter) {
var endOfSearchMarkerNode = this._getNextNode(e, true);
var next = this._getNextNode(e);
while (next && next != endOfSearchMarkerNode) {
if (filter.call(this, next, next.className + " " + next.id)) {
next = this._removeAndGetNext(next);
} else {
next = this._getNextNode(next);
}
}
},
/**
* Clean out spurious headers from an Element. Checks things like classnames and link density.
*
* @param Element
* @return void
**/
_cleanHeaders: function (e) {
for (var headerIndex = 1; headerIndex < 3; headerIndex += 1) {
this._removeNodes(e.getElementsByTagName("h" + headerIndex), function (header) {
return this._getClassWeight(header) < 0;
});
}
},
_flagIsActive: function (flag) {
return (this._flags & flag) > 0;
},
_removeFlag: function (flag) {
this._flags = this._flags & ~flag;
},
_isProbablyVisible: function (node) {
return (!node.style || node.style.display != "none")
&& !node.hasAttribute("hidden")
&& (!node.hasAttribute("aria-hidden") || node.getAttribute("aria-hidden") != "true");
},
/**
* Runs readability.
*
* Workflow:
* 1. Prep the document by removing script tags, css, etc.
* 2. Build readability's DOM tree.
* 3. Grab the article content from the current dom tree.
* 4. Replace the current DOM tree with the new one.
* 5. Read peacefully.
*
* @return void
**/
parse: function () {
// Avoid parsing too large documents, as per configuration option
if (this._maxElemsToParse > 0) {
var numTags = this._doc.getElementsByTagName("*").length;
if (numTags > this._maxElemsToParse) {
throw new Error("Aborting parsing document; " + numTags + " elements found");
}
}
// Remove script tags from the document.
this._removeScripts(this._doc);
this._prepDocument();
var metadata = this._getArticleMetadata();
this._articleTitle = metadata.title;
var articleContent = this._grabArticle();
if (!articleContent)
return null;
this.log("Grabbed: " + articleContent.innerHTML);
this._postProcessContent(articleContent);
// If we haven't found an excerpt in the article's metadata, use the article's
// first paragraph as the excerpt. This is used for displaying a preview of
// the article's content.
if (!metadata.excerpt) {
var paragraphs = articleContent.getElementsByTagName("p");
if (paragraphs.length > 0) {
metadata.excerpt = paragraphs[0].textContent.trim();
}
}
var textContent = articleContent.textContent;
return {
title: this._articleTitle,
byline: metadata.byline || this._articleByline,
dir: this._articleDir,
content: articleContent.innerHTML,
textContent: textContent,
length: textContent.length,
excerpt: metadata.excerpt,
siteName: metadata.siteName || this._articleSiteName
};
}
};
if (typeof module === "object") {
module.exports = Readability;
}
})();
@nitincodery
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  1. Does this work?
  2. How to run it?
  3. Is it incorporated in Extension?

@gildas-lormeau
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Author

gildas-lormeau commented Jan 11, 2023 •
edited
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  1. It should work even if it is a bit old
  2. See https://github.com/gildas-lormeau/SingleFile/wiki/How-to-execute-a-user-script-before-a-page-is-saved
  3. You can use user scripts in the browser and the CLI

@Joseridgeway
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Omg this code is too long to handle and understand. You can use archive for saving any type of page in reader mode. I am using it for the last 3 years, and I am totally satisfied.

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