为所有站点增加进入阅读模式按钮，点击后如果匹配成功则自动转码成为通用的阅读器样式方便使用，并提供扩展语音阅读功能（需要浏览器支持，推荐最新版Firefox浏览器）
// ==UserScript==
// @name 通用阅读器
// @version 0.4.5
// @description 为所有站点增加进入阅读模式按钮，点击后如果匹配成功则自动转码成为通用的阅读器样式方便使用，并提供扩展语音阅读功能（需要浏览器支持，推荐最新版Firefox浏览器）
// @author pppploi8
// @match https://*/*
// @match http://*/*
// @grant none
// @namespace https://greasyfork.org/users/240492
// ==/UserScript==
(function() {
var $ = function(selector){
return document.querySelector(selector);
}
var blackList = {"www.baidu.com": true, "www.sogou.com": true, "www.so.com": true, "www.bing.com":true, "cn.bing.com": true, "www.google.com": true, "m.sm.cn": true};
// 通用解析模板
function parseContentAndTitle(){
var mainDom = null;
function findMainDom(doms){
var docSize = document.body.scrollHeight * document.body.scrollWidth;
for(var i=0;i<doms.length;i++){
var dom = doms[i];
// 计算dom尺寸百分比并输出
var size = (dom.scrollWidth * dom.scrollHeight) / docSize;
if (size > 0.3 && dom.nodeName !== "CODE" && dom.nodeName !== "PRE"){ // pre和code是代码常用元素块，忽略不认为是正文内容
// 如果innerText字数大于500，则视为正文区
var text = dom.innerText;
if (text.length >= 500){
mainDom = dom;
}
}
findMainDom(dom.children||[]);
}
}
findMainDom(document.body.children);
if (mainDom){
// 在mainDom同层查找标题
// var titleList = [];
// findTitleDom(mainDom.parentNode.children, titleList);
// 查找标题逻辑bug较多,暂时改为查找网页title作为标题,后续重写逻辑进行优化
return {content: mainDom.innerText, title: document.title};
}
// function findTitleDom(doms, titleList){
// for(var i=0;i<doms.length;i++){
// var dom = doms[i];
// if (dom.children && dom.children.length !== 0){
// var title = findTitleDom(dom.children, titleList);
// }else{
// if (/\<h1|\<h2|title/.test(dom.outerHTML)){
// var title = dom.innerText;
// if (title && title.length >= 5 && title.length <= 200){
// titleList.push(dom);
// }
// }
// }
// }
// }
}
function parsePageUp(){
var as = document.querySelectorAll('a');
var reg = /上一章|上一篇|上一页|navigation-prev/;
for(var i=0;i<as.length;i++){
var text = as[i].outerHTML;
var href = (as[i].attributes.href && as[i].attributes.href.value) || (as[i].dataset && as[i].dataset.url);
if (text && reg.test(text.trim()) && href && href != "#" && href.indexOf("javascript:") !== 0){
return href;
}
}
}
function parsePageDown(){
var as = document.querySelectorAll('a');
var reg = /下一章|下一篇|下一页|navigation-next/;
for(var i=0;i<as.length;i++){
var text = as[i].outerHTML;
var href = (as[i].attributes.href && as[i].attributes.href.value) || (as[i].dataset && as[i].dataset.url);
if (text && reg.test(text.trim()) && href && href != "#" && href.indexOf("javascript:") !== 0){
return href;
}
}
}
function parsePageIndex(){
var as = document.querySelectorAll('a');
var reg = /目录/;
for(var i=0;i<as.length;i++){
var text = as[i].innerText;
var href = as[i].attributes.href && as[i].attributes.href.value;
if (text && text.length <= 10 && reg.test(text.trim()) && href && href != "#" && href.indexOf("javascript:") !== 0){
return href;
}
}
}
var fontsize = parseInt(localStorage["_er_fontsize"] || 0);
var padding = parseInt(localStorage["_er_padding"] || 10);
var autoplay = false;
if (localStorage['_er-autoplay'] === 'true'){
autoplay = true;
}
delete localStorage['_er-autoplay'];
if (top.window !== window) return; // iframe内的网页不展示按钮，也不支持进入阅读模式
if (localStorage['_er-enable'] === 'true'){
localStorage['_er-enable'] = 'false';
checkAndCreateReader(true);
} else if (blackList[location.host] !== true){
// 创建阅读模式悬浮按钮
$('body').children[0].insertAdjacentHTML('beforeBegin', '<button id="_er-entryReadMode" style="' +
' position: fixed;' +
' right: 50px;' +
' bottom: 50px;' +
' background-color: white;' +
' border: 1px solid black;' +
' border-radius: 10px;' +
' padding: 0 5px;' +
' height: 50px;' +
' overflow: auto;' +
' background-color: white;' +
' z-index: 201901272210;">进入阅读模式</button>');
// 配置阅读模式按钮自动淡出效果
var i = 1;
var interval = setInterval(function(){
i -= 0.03;
var btn = $('#_er-entryReadMode');
if (!btn) {
clearInterval(interval);
return;
}
$('#_er-entryReadMode').style.opacity = i;
if (i <= 0) {
btn.remove();
clearInterval(interval);
}
}, 100);
$('#_er-entryReadMode').onclick = checkAndCreateReader;
$('#_er-NotShowReadMode').onclick = function(){
localStorage['_er-disabled'] = 'true';
$('#_er-entryReadMode').remove();
$('#_er-NotShowReadMode').remove();
}
}
function checkAndCreateReader(notAlert){
// 通过调用通用模板尝试是否能够成功匹配到阅读内容
var content = parseContentAndTitle();
if (content && content.content){
content.pageup = parsePageUp();
content.pagedown = parsePageDown();
content.pageindex = parsePageIndex();
createReader(content);
}else{
if (notAlert !== true){
alert('当前页面解析失败，无法进入阅读模式！');
}
}
}
function setTheme(theme) {
switch(theme) {
case 'black':
$('._er').style.backgroundColor = 'black';
$('._er-title').style.color = 'lightgrey';
$('._er-content').style.color = 'lightgrey';
break;
case 'OliveDrab':
$('._er').style.backgroundColor = '#D3E1D0';
$('._er-title').style.color = 'black';
$('._er-content').style.color = 'black';
break;
case 'Khaki':
$('._er').style.backgroundColor = '#F6F2E7';
$('._er-title').style.color = 'black';
$('._er-content').style.color = 'black';
break;
case 'blue':
$('._er').style.backgroundColor = '#D3E5F9';
$('._er-title').style.color = 'black';
$('._er-content').style.color = 'black';
break;
case 'white':
$('._er').style.backgroundColor = 'white';
$('._er-title').style.color = 'black';
$('._er-content').style.color = 'black';
break;
}
localStorage['_er-theme'] = theme;
$('._er').dataset['theme'] = theme;
}
// 创建阅读器
function createReader(content){
$('#_er-entryReadMode') && $('#_er-entryReadMode').remove();
$('#_er-NotShowReadMode') && $('#_er-NotShowReadMode').remove();
addClassAndDom();
if (window.SpeechSynthesisUtterance){
$('#_er-tts').style.display = 'block';
}
if (localStorage['_er-theme']) {
setTheme(localStorage['_er-theme']);
}
$('._er-title').innerText = content.title;
var contentArr = content.content.split('\n');
var contentHtml = '';
for(var i=0;i<contentArr.length;i++){
var line = contentArr[i];
if (line){
contentHtml += '<span>' + line + '</span>';
}
contentHtml += '<br>';
}
$('._er-content').innerHTML = contentHtml;
var spanNodes = document.querySelectorAll('._er-content span');
for(var i=0;i<spanNodes.length;i++){
spanNodes[i].onclick = function(){
for(var j=0;j<spanNodes.length;j++){
spanNodes[j].classList.remove('_er-current');
}
this.classList.add('_er-current');
}
}
// 挂接键盘事件，实现键盘上下左右切换阅读功能
$('body').onkeydown = function(e){
e.stopPropagation();
switch(e.keyCode || e.which || e.charCode){
case 38: // up
if (e.ctrlKey) {
$('._er').scrollTop = $('._er').scrollTop - (document.documentElement.clientHeight - 24)
} else {
toPrevReadPos();
updateReadPos();
}
break;
case 40: // down
if (e.ctrlKey) {
$('._er').scrollTop = $('._er').scrollTop + (document.documentElement.clientHeight - 24);
} else {
toNextReadPos();
updateReadPos();
}
break;
case 37: // left
if (e.ctrlKey) {
toPrevPage();
} else {
$('._er').scrollTop = $('._er').scrollTop - (document.documentElement.clientHeight - 24);
}
break;
case 39: // right
if (e.ctrlKey) {
toNextPage();
} else {
$('._er').scrollTop = $('._er').scrollTop + (document.documentElement.clientHeight - 24);
}
break;
default:
return true;
}
return false;
function toPrevPage(){
if (content.pageup){
localStorage['_er-enable'] = 'true';
location.href = content.pageup;
}else{
alert('很抱歉，没有匹配到上一页！');
}
}
function toNextPage(){
if (content.pagedown){
localStorage['_er-enable'] = 'true';
location.href = content.pagedown;
}else{
alert('很抱歉，没有匹配到下一页！');
}
}
};
$('._er-content').onclick = function(e){ // 适用于墨水屏的左右点击无动画翻页
var x = e.pageX;
var width = document.documentElement.clientWidth;
if (x <= width*0.1){ // 前翻一页
$('._er').scrollTop = $('._er').scrollTop - (document.documentElement.clientHeight - 24)
}else if(x >= width*0.9){ // 后翻一页
$('._er').scrollTop = $('._er').scrollTop + (document.documentElement.clientHeight - 24);
}
}
$('#_er-pageindex').onclick = function(){
if (content.pageindex){
location.href = content.pageindex;
}else{
alert('很抱歉，没有匹配到目录！');
}
};
$('#_er-switch-theme').onclick = function(){
var current = $('._er').dataset['theme'] || 'white';
var themeList = ['white', 'Khaki', 'blue', 'OliveDrab', 'black'];
var index = themeList.indexOf(current);
if (index === -1) index = 0;
index++;
if (index >= themeList.length) {
index = 0;
}
setTheme(themeList[index]);
}
$('#_er-pageup').onclick = function(){
if (content.pageup){
localStorage['_er-enable'] = 'true';
location.href = content.pageup;
}else{
alert('很抱歉，没有匹配到上一页！');
}
};
$('#_er-pagedown').onclick = function(){
if (content.pagedown){
localStorage['_er-enable'] = 'true';
location.href = content.pagedown;
}else{
alert('很抱歉，没有匹配到下一页！');
}
};
$('#_er-pagedown').dataset['nexturl'] = content.pagedown;
setFontSize();
setPadding();
// 按钮事件处理
$('#_er-close').onclick = removeDom;
$('#_er-font-plus').onclick = function(){
fontsize += 2;
setFontSize();
};
$('#_er-font-minus').onclick = function(){
fontsize -= 2;
setFontSize();
};
$('#_er-border').onclick= function() {
padding = padding == 10 ? 5 : 10;
setPadding();
}
$('#_er-tts').onclick = function(){
if (this.dataset['pause'] === 'true'){
// 开始播放
this.innerText = '停止';
this.dataset['pause'] = 'false';
playNextText();
}else{
this.innerText = '听书';
this.dataset['pause'] = 'true';
}
};
if (autoplay){
$('#_er-tts').innerText = '停止';
$('#_er-tts').dataset['pause'] = 'false';
playNextText();
}else{
$('#_er-tts').dataset['pause'] = 'true';
}
}
// 听书功能
function playNextText(){
updateReadPos();
var current = $('._er-current');
var playText = '';
if (current){
playText = current.innerText;
}else{
playText = $('._er-title').innerText;
}
if (playText){
var utterThis = new SpeechSynthesisUtterance();
utterThis.text = playText;
utterThis.onerror = function(){
$('#_er-tts').dataset['pause'] = 'true';
alert("TTS语音转换文字出现异常，听书已停止运行！");
};
utterThis.onend = function(){
toNextReadPos();
if (!$('._er-current')){
var nextUrl = $('#_er-pagedown').dataset['nexturl'];
console.log(nextUrl);
if (nextUrl){
localStorage['_er-autoplay'] = 'true';
localStorage['_er-enable'] = 'true';
location.href = nextUrl;
}
return;
}
if ($('#_er-tts').dataset['pause'] === 'false'){
playNextText();
}
};
speechSynthesis.speak(utterThis);
}else{
toNextReadPos();
playNextText();
}
}
function toNextReadPos(){
var current = $('._er-current');
var nextSpan = null;
if (current){
nextSpan = current.nextElementSibling;
while(nextSpan && nextSpan.nodeName !== 'SPAN'){
nextSpan = nextSpan.nextElementSibling;
}
}else{
nextSpan = $('._er-content span');
}
if (current) current.classList.remove('_er-current');
if (nextSpan) nextSpan.classList.add('_er-current');
}
function toPrevReadPos(){
var current = $('._er-current');
var prevSpan = null;
if (current){
prevSpan = current.previousElementSibling;
while(prevSpan && prevSpan.nodeName !== 'SPAN'){
prevSpan = prevSpan.previousElementSibling;
}
}
if (current) current.classList.remove('_er-current');
if (prevSpan) prevSpan.classList.add('_er-current');
}
function updateReadPos(){
if ($('._er-current'))
$('._er').scrollTop = $('._er-current').offsetTop - (document.documentElement.clientHeight / 2);
}
function setFontSize(){
localStorage["_er_fontsize"] = fontsize;
$('._er-title').style.fontSize = (20+fontsize) + 'px';
$('._er-title').style.lineHeight = ((20+fontsize)*1.5) + 'px';
$('._er-content').style.fontSize = (14+fontsize) + 'px';
$('._er-content').style.lineHeight = ((14+fontsize)*1.5) + 'px';
}
function setPadding() {
localStorage["_er_padding"] = padding;
$('._er-content').style.padding = '10px ' + padding + '%';
}
var oldOverflow = '';
var oldOnKeyDown = $('body').onkeydown;
function removeDom(){
$('._er').remove();
$('body').style.overflow = oldOverflow;
$('body').onkeydown = oldOnKeyDown;
}
function addClassAndDom(){
oldOverflow = $('body').style.overflow;
$('body').style.overflow = 'hidden';
$('body').children[0].insertAdjacentHTML('beforeBegin',
'<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,minimum-scale=1,user-scalable=no"><div class="_er">' +
' <div class="_er-tts">' +
' <button type="button" id="_er-tts">听书</button>' +
' </div>' +
' <div class="_er-tools">' +
' <button type="button" id="_er-pageindex">目录</button>' +
' <button type="button" id="_er-switch-theme">切换主题</button>' +
' <button type="button" id="_er-font-plus">字号+</button>' +
' <button type="button" id="_er-font-minus">字号-</button>' +
' <button type="button" id="_er-border">边距</button>' +
' <button type="button" id="_er-close">返回原网页</button>' +
' </div>' +
' <div class="_er-title"></div>' +
' <div class="_er-content">' +
' </div>' +
' <div class="_er-tools">' +
' <button type="button" id="_er-pageup">上一页</button>' +
' <button type="button" id="_er-pagedown">下一页</button>' +
' </div>' +
'</div>');
$('body').children[0].insertAdjacentHTML('beforeBegin',
'<style>' +
'._er{' +
' position: fixed;' +
' left: 0;' +
' right: 0;' +
' top: 0;' +
' bottom: 0;' +
' overflow: auto;' +
' background-color: white;' +
' z-index: 201901272211;' +
'}' +
'._er-title{' +
' text-align: center;' +
' font-size: 20px;' +
' line-height: 30px;' +
' font-weight: 900;' +
' padding: 10px 10%;' +
' color: black;' +
'}' +
'._er-content{' +
' padding: 10px 10%;' +
' font-size: 14px;' +
' line-height: 21px;' +
' color: black;' +
'}' +
'._er-tools{' +
' margin-top: 10px;' +
' margin-bottom: 10px;' +
' text-align: center;' +
'}' +
'._er-tools button{' +
' cursor: pointer;' +
' color: black;' +
' background-color: #908E90;' +
' border: 1px solid black;' +
' padding: 5px;' +
' border-radius: 10px;' +
'}' +
'._er-tts button{' +
' width: 50px;' +
' height: 50px;' +
' position: fixed;' +
' right: 15px;' +
' bottom: 15px;' +
' z-index: 201901272212;' +
' color: black;' +
' border: 1px solid black;' +
' opacity: 0.5;' +
' cursor: pointer;' +
' border-radius: 25px;' +
' display: none;' +
'}' +
'._er-current{' +
' background-color: yellow;' +
' color: black;' +
'}' +
'</style>');
}
})();