// ==UserScript==
// @name 野径云俱黑，江船火独明
// @namespace https://viayoo.com/
// @version 5.1
// @author 谷花泰
// @description 让你的网页随风潜入夜
// @run-at document-start
// @match *
// @grant none
// ==/UserScript==

(function () {
/* 判断是否该执行 */
/* 网址黑名单制，遇到这些域名不执行 */
const blackList = ['example.com'];

const hostname = window.location.hostname;
const key = encodeURIComponent('谷花泰:野径云俱黑，江船火独明:执行判断');
const isBlack = blackList.some(keyword => {
if (hostname.match(keyword)) {
return true;
};
return false;
});

if (isBlack || window[key]) {
return;
};
window[key] = true;

/* 开始执行代码 */
class ChangeBackground {
constructor() {
this.init();
};
init() {
this.addStyle(`
html, body {
background-color: #000 !important;
}
* {
color: #CCD1D9 !important;
box-shadow: none !important;
}
*:after, *:before {
border-color: #1e1e1e !important;
color: #CCD1D9 !important;
box-shadow: none !important;
background-color: transparent !important;
}
a, a > *{
color: #409B9B !important;
}
[data-change-border-color][data-change-border-color-important] {
border-color: #1e1e1e !important;
}
[data-change-background-color][data-change-background-color-important] {
background-color: #000 !important;
}
`);
this.selectAllNodes(node => {
if (node.nodeType !== 1) {
return;
};
const style = window.getComputedStyle(node, null);
const whiteList = ['rgba(0, 0, 0, 0)', 'transparent'];
const backgroundColor = style.getPropertyValue('background-color');
const borderColor = style.getPropertyValue('border-color');
if (whiteList.indexOf(backgroundColor) < 0) {
if (this.isWhiteToBlack(backgroundColor)) {
node.dataset.changeBackgroundColor = '';
node.dataset.changeBackgroundColorImportant = '';
} else {
delete node.dataset.changeBackgroundColor;
delete node.dataset.changeBackgroundColorImportant;
};
};
if (whiteList.indexOf(borderColor) < 0) {
if (this.isWhiteToBlack(borderColor)) {
node.dataset.changeBorderColor = '';
node.dataset.changeBorderColorImportant = '';
} else {
delete node.dataset.changeBorderColor;
delete node.dataset.changeBorderColorImportant;
};
};
if (borderColor.indexOf('rgb(255, 255, 255)') >= 0) {
delete node.dataset.changeBorderColor;
delete node.dataset.changeBorderColorImportant;
node.style.borderColor = 'transparent';
};
});
};
addStyle(style = '') {
const styleElm = document.createElement('style');
styleElm.innerHTML = style;
document.head.appendChild(styleElm);
};
/* 是否为灰白黑 */
isWhiteToBlack(colorStr = '') {
let hasWhiteToBlack = false;
const colorArr = colorStr.match(/rgb.+?\)/g);
if (!colorArr || colorArr.length === 0) {
return true;
};
colorArr.forEach(color => {
const reg = /rgb[a]*?\(([0-9]+),.*?([0-9]+),.*?([0-9]+).*?\)/g;
const result = reg.exec(color);
const red = result[1];
const green = result[2];
const blue = result[3];
const deviation = 20;
const max = Math.max(red, green, blue);
const min = Math.min(red, green, blue);
if (max - min <= deviation) {
hasWhiteToBlack = true;
};
});
return hasWhiteToBlack;
};
selectAllNodes(callback = () => { }) {
const allNodes = document.querySelectorAll('*');
Array.from(allNodes, node => {
callback(node);
});
this.observe({
targetNode: document.documentElement,
config: {
attributes: false
},
callback(mutations, observer) {
const allNodes = document.querySelectorAll('*');
Array.from(allNodes, node => {
callback(node);
});
}
});
};
observe({ targetNode, config = {}, callback = () => { } }) {
if (!targetNode) {
return;
};

config = Object.assign({
attributes: true,
childList: true,
subtree: true
}, config);

const observer = new MutationObserver(callback);
observer.observe(targetNode, config);
};
};
new ChangeBackground();
})();