// ==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 1.3.0
// @grant none
// @include *
// @author mika
// ==/UserScript==
/**
*
* # CHANGE LOG
* 2018-06-18 [修复] 对于隐藏的文本，不再进行着色
* 2018-04-17 支持<01.01> <2007.09> 格式
* 修正标签正则
* 2018-04-16 支持<01 Feb 2017> 格式
* 添加 noscript 等特殊标签到黑名单
* 兼容类似<textarea>$HTML</textarea>这种s13用法
* 2018-04-14 支持<Feb 01 '17> 和 <2018年> 格式
* 2018-04-13 修改替换方式，可应对多个正则存在包含关系的情况
*
*/
(function(){
'use strict';
/*
* 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(信息越详细，放在前面)
*/
var rules = [
// yyyy-mm-dd
{key: "01", regExp: /\d{4}-[01]?\d-[0-3]?\d/mg},
// yyyy/mm/dd
{key: "01", regExp: /\d{4}\/[01]?\d\/[0-3]?\d/mg},
// yyyy.mm.dd
{key: "01", regExp: /\d{4}\.[01]?\d\.[0-3]?\d/mg},
// month dd, yyyy
{key: "01", regExp: new RegExp("(?:"+ monthPart +") [0-3]?\\d[,\\s]{1}\\s?\\d{4}", 'igm')},
// dd month yyyy
{key: "01", regExp: new RegExp("[0-3]?\\d (?:"+ monthPart +")\\s?\\d{4}", 'igm')},
// month dd 'yy
{key: "09", regExp: new RegExp("(?:"+ monthPart +") [0-3]?\\d\\s'\\d{2}", 'igm')},
// yyyy年mm月dd日
{key: "01", regExp: /\d{4}\s?年\s?[01]?\d\s?月\s?[0-3]?\d\s?日/mg},
// yyyy-mm | yyyy/mm | yyyy.mm
{key: "02", regExp: /\d{4}[-\/\.]{1}[01]{1}\d/mg},
// yyyy年mm月
{key: "02", regExp: /\d{4}\s?年\s?[01]?\d\s?月/mg},
// mm-dd | mm/dd | mm.dd
{key: "03", regExp: /[01]{1}\d[-\/\.][0-3]{1}\d/mg},
// mm月dd日
{key: "03", regExp: /[01]?\d\s?月\s?[0-3]?\d\s?日/mg},
// N 天前
{key: "04", regExp: /\d+\s?天前/mg},
// N days ago
{key: "04", regExp: /\d+\s?days?\sago/mg},
// N 月前
{key: "05", regExp: /\d+\s?月前/mg},
// N months ago
{key: "05", regExp: /\d+\s?months?\sago/mg},
// N 年前
{key: "07", regExp: /\d+\s?年前/mg},
// yyyy年
{key: "10", regExp: /\d{4}\s?年/mg},
// N years ago
{key: "07", regExp: /\d+\s?years?\sago/mg},
// month yyyy
{key: "08", regExp: new RegExp("(?:"+ monthPart +")['\\s]{1}\\d{4}", 'igm')},
// month dd
{key: "06", regExp: new RegExp("(?:"+ monthPart +")['\\s]{1}[0-3]?\\d", 'igm')},
];
// 主函数
function colorDate(){
var nodes = getMatchNode();
nodes.forEach(function(node){
var newNode = document.createElement("datetext");
newNode.innerHTML = applyRules(node.nodeValue, rules)
// replace child node
node.parentNode.replaceChild(newNode, node);
});
}
/*
* 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;
}
/*
* 获取文本节点迭代器
*/
function getTextNodeIterator(){
return document.createNodeIterator(
document.body,
NodeFilter.SHOW_TEXT, function(node) {
var blackList = ['style', 'script', 'noscript', 'noframes', 'canvas', 'template', 'datetext', 'datespan'];
var parentNode = node.parentNode;
if(blackList.indexOf(parentNode.nodeName.toLowerCase()) > -1){
return NodeFilter.FILTER_REJECT;
}
/*
* 隐藏了的文本，不处理
* - 有的程序员会使用隐藏文本来存储数据（比如存储 html 或者 链接)
*/
var style = window.getComputedStyle(parentNode);
if(style.display === "none"){
return NodeFilter.FILTER_REJECT;
}
if(style.visibility === "hidden"){
return NodeFilter.FILTER_REJECT;
}
return NodeFilter.FILTER_ACCEPT;
}
);
}
/*
* 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();
case "08" : return handler_08();
case "09" : return handler_09();
case "10" : return handler_10();
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_09(){
return function(match){
var parts = match.split("'");
var year = parts.pop();
var curr = new Date().getFullYear();
var yStr = '' + Math.floor(curr%100 > parseInt(year) ? curr/100 : curr/100 - 1).toString() + year;
parts.push(yStr);
return replace(match, parts.join(" "));
}
}
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));
};
}
function handler_08(){
return function(match){
var v = match.replace(/'/, ' ').split(' ').join(" 01 ");
return replace(match, v);
};
}
function handler_10(){
return function(match){
var year = parseInt(match.match(/\d+/)[0]).toString();
return replace(match, year + "-01-01");
}
}
/*
* 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;
}
}
function applyRules(text, rules){
var r = matchRules(text, rules);
return replaceMark(r.markedText, r.values);
}
/*
* 根据rules，进行匹配，标记匹配, 并计算出替换值
* 用来避免两个正则是包含关系的情况
*/
function matchRules(text, rules){
var idxUtil = makeIdxUtil(-1);
var values = [];
rules.forEach(function(rule){
var handler = getHandler(rule.key);
text = text.replace(rule.regExp, function(match){
values.push(handler(match));
var mark = "@[["+ idxUtil.next() +"]]";
return mark
});
});
return {
markedText: text,
values: values
}
}
// 索引工具
function makeIdxUtil(init){
return {
curr: init,
next: function(){ this.curr++; return this.curr; },
}
}
// 把标记替换为着色后的人日期
function replaceMark(text, values){
return text.replace(/@\[\[\d+\]\]/mg, function(mark){
var idx = parseInt(mark.match(/\d+/)[0]);
return values[idx]
});
}
/*
* 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 delayColorDate = createDelayCall(colorDate, 400);
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");
}
// 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)
if(MutationObserver){ 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);
})();
