"Set date color according to date 根据网页上日期的新旧程度， 给日期进行着色， 比如说已经是5年前的一个日期会成为红色， 以便提醒阅览者，注意信息可能过于陈旧。"
目前為
// ==UserScript==
// @name colorDate
// @namespace https://github.com/mika-cn/user-scripts
// @description "Set date color according to date 根据网页上日期的新旧程度， 给日期进行着色， 比如说已经是5年前的一个日期会成为红色， 以便提醒阅览者，注意信息可能过于陈旧。"
// @version 1.1.1
// @grant none
// @include *
// @author mika
// ==/UserScript==
(function(){
'use strict';
/*
* 获取文本节点迭代器
*/
function getTextNodeIterator(){
return document.createNodeIterator(
document.body,
NodeFilter.SHOW_TEXT, function(node) {
if(['script', 'style', 'datetext', 'datespan'].indexOf(node.parentNode.nodeName.toLowerCase()) > -1){
return NodeFilter.FILTER_REJECT;
}else{
return NodeFilter.FILTER_ACCEPT;
}
}
);
}
/*
* 根据规则(判断是否是日期)，获取满足的节点
*/
function getMatchNode(){
var nodes = [];
var currentNode;
var nodeIterator = getTextNodeIterator();
while (currentNode = nodeIterator.nextNode()) {
var v = currentNode.nodeValue;
var rule = rules.some(function(rule){
return !!v.match(rule.regExp);
});
if(rule){
nodes.push(currentNode);
}
}
return nodes;
}
/*
* 时长阀值与色值
*/
var day = 24 * 60 * 60 * 1000;
var year = 365 * day;
var colors = [
{color: "#ff0000", threshold: 5 * year},
{color: "#ff5f00", threshold: 3 * year},
{color: "#d700ff", threshold: 1 * year},
{color: "#8700ff", threshold: 183 * day},
{color: "#00af00", threshold: 7 * day},
{color: "#00d700", threshold: 1 * day},
];
var monthPart = (`
Jan|January|
Feb|February|
Mar|March|
Apr|April|
May|
Jun|June|
Jul|July|
Aug|Augest|
Sep|Sept|September|
Oct|October|
Nov|November|
Dec|December
`).replace(/\n\s*/gm, '');
/*
* 判断规则
*/
var rules = [
{key: "01", regExp: /\d{4}-[01]?\d-[0-3]?\d/mg},
{key: "01", regExp: /\d{4}\/[01]?\d\/[0-3]?\d/mg},
{key: "02", regExp: /\d{4}-[01]{1}\d(?!-\d[0-3]?\d)/mg},
{key: "02", regExp: /\d{4}\/[01]{1}\d(?!\/\d[0-3]?\d)/mg},
{key: "03", regExp: /(?:\s|^)[01]{1}\d-[0-3]{1}\d/mg},
{key: "01", regExp: new RegExp("(?:"+ monthPart +") [0-3]?\\d[,\\s]{1}\\s?\\d{4}", 'igm')},
{key: "01", regExp: /\d{4}年[01]?\d月[0-3]?\d日/mg},
{key: "02", regExp: /\d{4}年[01]?\d月(?!^[0-3]?\d日)/mg},
{key: "03", regExp: /(?:\s|^)[01]?\d月[0-3]?\d日/mg},
{key: "04", regExp: /\d+\s?天前/mg},
{key: "04", regExp: /\d+\s?days?\sago/mg},
{key: "05", regExp: /\d+\s?月前/mg},
{key: "05", regExp: /\d+\s?months?\sago/mg},
{key: "06", regExp: new RegExp("(?:"+ monthPart +")['\\s]{1}[0-3]{1}\\d(?![,\\s]{1}\\s?\\d{4})", 'igm')},
{key: "07", regExp: /\d+\s?年前/mg},
{key: "07", regExp: /\d+\s?years?\sago/mg},
];
/*
* 根据不同的正则，返回处理函数
*/
function getHandler(key){
switch(key){
case "01" : return handler_01();
case "02" : return handler_02();
case "03" : return handler_03();
case "04" : return handler_04();
case "05" : return handler_05();
case "06" : return handler_06();
case "07" : return handler_07();
default: return function(match){ return match;};
}
}
function handler_01(){
return function(match){
var dateStr = match.replace(/年|月/g, '-').replace("日", '');
return replace(match, dateStr);
};
}
function handler_02(){
return function(match){
var dateStr = match.replace(/年|\//g, '-').replace("月", '') + "-01";
return replace(match, dateStr);
};
}
function handler_03(){
return function(match){
var dateStr = (new Date()).getFullYear().toString() + "-" + match.trim().replace(/月/g, '-').replace("日", '');
return replace(match, dateStr);
};
}
function handler_04(){
return function(match){
var n = parseInt(match.match(/\d+/)[0]);
return replace(match, (new Date() - n * day));
};
}
function handler_05(){
return function(match){
var n = parseInt(match.match(/\d+/)[0]);
return replace(match, (new Date() - n * 30 * day));
};
}
function handler_06(){
return function(match){
return replace(match, match.replace(/'/, ' ') + " " + (new Date()).getFullYear().toString());
};
}
function handler_07(){
return function(match){
var n = parseInt(match.match(/\d+/)[0]);
return replace(match, (new Date() - n * 365 * day));
};
}
/*
* 处理函数, 根据时长阀值着色
*/
function replace(match, dateStr){
try{
var result = match;
var diff = Date.now() - new Date(dateStr);
colors.some(function(item){
if(diff >= item.threshold){
result = "<datespan style='color:"+ item.color +";'>" + match +"</datespan>";
return true;
}
return false;
});
return result;
}catch(e){
return match;
}
}
// 主函数
function colorDate(){
var nodes = getMatchNode();
nodes.forEach(function(node){
// replace child node
var newNode = document.createElement("datetext");
var html = node.nodeValue;
rules.forEach(function(rule){
var match = html.match(rule.regExp);
if(match){
html = html.replace(rule.regExp, getHandler(rule.key));
}
});
newNode.innerHTML = html;
node.parentNode.replaceChild(newNode, node);
});
}
/*
* 创建延迟调用对象
* 用来防止短时间内被调用多次
*/
var createDelayCall = function(fn, delay){
var dc = {};
dc.action = fn;
dc.clearTimeout = function(){
if(dc.timeoutId){
clearTimeout(dc.timeoutId);
}
};
dc.run = function(){
dc.clearTimeout();
dc.timeoutId = setTimeout(function(){
dc.action();
dc.clearTimeout();
}, delay);
};
return dc;
};
/*
* 判断变更是否来自脚本
*/
function isColorDateMotation(mutationRecords){
return mutationRecords.every(function(record){
return record.type === "childList" && record.addedNodes.length > 0 && record.addedNodes[0].nodeName.toLowerCase() === "datetext";
});
}
/*
* 初始化 mutationObserver
*/
function initMutationObserver(){
var observer = new MutationObserver(function(mutationRecords){
if(isColorDateMotation(mutationRecords)){
// 本脚本产生的变更，不触发
// console.log("Ignore motation")
}else{
delayColorDate.run();
}
});
observer.observe(document, {
attributes: false,
childList: true,
subtree: true
});
//console.log("init mutationObserver");
}
var delayColorDate = createDelayCall(colorDate, 400);
// 监听变更，触发着色 (适用于动态网页，如: ajax加载内容后产生变更)
initMutationObserver();
// 静态网页加载过程中不会产生变更, 直接调用
setTimeout(colorDate, 400);
setTimeout(colorDate, 1000);
setTimeout(colorDate, 4000);
})();