Content reader on any page, selecting the text area automatically or manually.
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// ==UserScript==
// @name Page Read Mode
// @name:zh-CN 网页阅读模式
// @name:zh-TW 網頁閱讀模式
// @description Content reader on any page, selecting the text area automatically or manually.
// @description:zh-CN 在任何需要的页面中开启阅读模式，自动或手动选择正文区域。
// @description:zh-TW 在任何需要的頁面中開啟閱讀模式，自動或手動選擇正文區域。
// @authuer Moshel
// @namespace https://hzy.pw
// @@homepageURL https://hzy.pw/p/1364
// @supportURL https://github.com/h2y/link-fix
// @icon https://wiki.greasespot.net/images/f/f3/Book.png
// @license GPL-3.0
// @include *
// @grant GM_setClipboard
// *run-at context-menu
// @require https://cdn.staticfile.org/keymaster/1.6.1/keymaster.min.js
// @resource useageIMG https://github.com/h2y/link-fix/raw/master/read_mode/useage.png
// @date 12/17/2015
// @modified 01/20/2016
// @version 1.0.0
// ==/UserScript==
/*
global var
*/
let mode = 0, //状态标记
topNode = null, //顶层节点
styleNode = null,
butNodes = null,
useageNode = null;
/*
Tool functions
*/
function isNodeShow(node) {
const styles = window.getComputedStyle(node);
if(styles.display=='none' || styles.visibility=='hidden')
return false;
if(!parseInt(styles.height) || !parseInt(styles.height))
return false;
return true;
}
/*
main functions
*/
function enterCliping(e) {
mode = 1;
e.preventDefault();
//add style
if(!styleNode) {
styleNode = document.createElement('style');
styleNode.innerHTML = `.cliper-top-node {
box-shadow: 0 0 20px #777 !important;
border: 3px solid red !important;
} .read-mode-reading {
position: fixed !important;
z-index: 9999970 !important;
top: 0 !important;
left: 0 !important;
height: 100% !important;
width: calc(100%-30px) !important;
background-color: white !important;
overflow: scroll !important;
padding: 30px !important;
border: 0 !important;
margin: 0 !important;
} .read-mode-buts {
position: fixed;
z-index: 9999985;
top: 2rem; right: 1rem;
} .read-mode-button {
width: 54px;
height: 54px;
margin: 0 .5rem;
padding: 10px 15px;
color: #fff;
opacity: .5;
transition: 500ms;
border-radius: 5px;
background-color: black;
} .read-mode-button:hover {
background-color: white;
border-radius: 0;
box-shadow: 0 0 10px #000;
color: #000;
} img.read-mode-useage {
position: fixed;
right: 3rem;
bottom: 2rem;
z-index: 9999975;
opacity: .7;
}`;
//styleNode.id = 'read_mode';
document.body.appendChild(styleNode);
}
// useage image
if(!useageNode) {
useageNode = document.createElement('img');
useageNode.src = 'https://github.com/h2y/link-fix/raw/master/read_mode/useage.png';
useageNode.className = 'read-mode-useage';
document.body.appendChild(useageNode);
}
useageNode.style.display = '';
//choose the init node
topNode = document.body;
let preNode = null;
do {
preNode = topNode;
onDown(e);
}while(preNode!=topNode && preNode.clientHeight*0.9 < topNode.clientHeight);
}
function quitCliping(e) {
mode = 0;
e.preventDefault();
useageNode.style.display = 'none';
changeTopNode(null);
if(butNodes)
butNodes.style.display = 'none';
topNode.classList.remove('read-mode-reading');
}
function buildButNodes() {
butNodes = document.createElement('div');
butNodes.className = 'read-mode-buts';
let buts = [
{
text: "Exit read mode",
handler: quitCliping,
icon: 'x'
}, {
text: "Save HTML data",
handler: onSaveHTML,
icon: '↓'
}
];
for(let but of buts) {
let newBut = document.createElement('a');
newBut.className = 'read-mode-button';
newBut.innerHTML = but.icon;
newBut.title = but.text;
newBut.onclick = but.handler;
butNodes.appendChild(newBut);
}
document.body.appendChild(butNodes);
}
function changeTopNode(newNode) {
if(topNode)
topNode.classList.remove('cliper-top-node');
if(newNode)
newNode.classList.add('cliper-top-node');
else
return;
topNode = newNode;
//scroll
var winH = window.screen.availHeight,
winY = window.scrollY,
domH = topNode.clientHeight,
domY = topNode.getBoundingClientRect().top + winY;
//console.log(winH,winY,domH,domY);
if(domH>winH)
window.scrollTo(0, domY - 50 );
else
window.scrollTo(0, domY - (winH-domH)/2 );
}
/*
Event handler
*/
function onSaveHTML(e) {
let htmlStr = '';
htmlStr += topNode.outerHTML.split('\n').join('')
.replace(/(id|class)=(\'.*?\'|\".*?\")/ig, '')
.replace(/<!--.*?-->/g, '')
.replace(/>[\t ]+?</g, '><')
.replace(/<(link|meta).*?>/ig, '')
.replace(/<style.*?>.*?<\/style>/ig, '')
.replace(/<script.*?>.*?<\/script>/ig, '');
GM_setClipboard(htmlStr);
alert('Copied into clipboard.');
}
function onUp(e) {
if(!mode) return;
e.preventDefault();
if(topNode.parentElement)
changeTopNode(topNode.parentNode);
}
function onDown(e) {
if(!mode) return;
e.preventDefault();
if(!topNode.childElementCount)
return;
var scanNodes = topNode.children,
maxNode = null;
var maxHeight = -1;
for(let node of scanNodes)
if(isNodeShow(node) && node.clientHeight > maxHeight) {
maxHeight = node.clientHeight;
maxNode = node;
}
if(maxNode)
changeTopNode(maxNode);
}
function onLeft(e) {
if(!mode) return;
e.preventDefault();
let nowNode = topNode;
for(let node=nowNode; node.previousElementSibling;) {
node = node.previousElementSibling;
if(isNodeShow(node)) {
nowNode = node;
break;
}
}
if(nowNode!=topNode)
changeTopNode(nowNode);
//else: up
else if (topNode.parentNode) {
let bakNode = nowNode = topNode;
onUp(e);
nowNode = topNode;
onLeft(e);
if(nowNode==topNode)
changeTopNode(bakNode);
else
onDown(e);
}
}
function onRight(e) {
if(!mode) return;
e.preventDefault();
let nowNode = topNode;
for(let node=nowNode; node.nextElementSibling;) {
node = node.nextElementSibling;
if(isNodeShow(node)) {
nowNode = node;
break;
}
}
if(nowNode!=topNode)
changeTopNode(nowNode);
//else: up
else if (topNode.parentNode) {
let bakNode = nowNode = topNode;
onUp(e);
nowNode = topNode;
onRight(e);
if(nowNode==topNode)
changeTopNode(bakNode);
else
onDown(e);
}
}
function onEnter(e) {
if(!mode) return;
e.preventDefault();
quitCliping(e);
topNode.classList.add('read-mode-reading');
//buttons
if(butNodes)
butNodes.style.display = '';
else
buildButNodes();
}
/*
Main
*/
key('alt+r', function(){
if(mode)
quitCliping(new MouseEvent("main"));
else
enterCliping(new MouseEvent("main"));
});
/*
bind action
*/
key('up', onUp);
key('down', onDown);
key('left', onLeft);
key('right', onRight);
key('enter', onEnter);
key('esc', quitCliping);