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京东(jd.com)单价助手，增加了商品列表显示单价(每公斤/升价格)功能，帮助你在京东(jingdong)找到最划算的商品
// ==UserScript==
// @name 京东单价助手
// @namespace http://greasyfork.org/
// @version 1.21
// @description 京东(jd.com)单价助手，增加了商品列表显示单价(每公斤/升价格)功能，帮助你在京东(jingdong)找到最划算的商品
// @author Yarmu
// @match *://search.jd.com/*
// @match *://list.jd.com/*
// @match *://item.jd.com/*
// @grant GM_setValue
// @grant GM_getValue
// @supportURL https://greasyfork.org/zh-CN/scripts/30522-%E4%BA%AC%E4%B8%9C%E5%8D%95%E4%BB%B7%E5%8A%A9%E6%89%8B
// ==/UserScript==
(function() {
var host = window.location.host.toLowerCase();
window.priceTipEnabled = GM_getValue('jd_price_tip_enabled', true);
if (host === 'list.jd.com' || host === 'search.jd.com') {
addPriceTipListener('.p-price', addListPriceTip, 1000);
addPriceTipListener('.f-sort', addListPriceButton);
} else if (host === 'item.jd.com') {
addPriceTipListener('.p-price', addItemPriceTip);
addPriceTipListener('.p-price-plus', addItemPriceTip);
addPriceTipListener('.p-price-sam', addItemPriceTip);
}
})();
function addPriceTipListener(tag, func, time) {
var onModifiedFunc = function() {
$(this).unbind("DOMSubtreeModified");
func.call(this);
$(this).bind("DOMSubtreeModified", onModifiedFunc);
};
var eachCallFunc = function() {
$(tag).each(function() {
if (!$(this).attr('priceTip')) {
$(this).attr('priceTip', '1');
onModifiedFunc.call(this);
}
});
};
eachCallFunc();
if (time) {
setInterval(eachCallFunc, time);
}
}
function addListPriceTip() {
if (!window.priceTipEnabled) return;
//处理plus价格的情况
addPlusListPriceTip.call(this, '.price-plus-1');
addPlusListPriceTip.call(this, '.price-sams-1');
//处理列表价格
var priceItem = $(this).find('strong i');
var price = getFloat(priceItem.text());
if (isNaN(price)) {
//处理广告和推广价格
priceItem = $(this).find('strong span');
price = getFloat(priceItem.text());
if (isNaN(price)) {
priceItem = $(this).find('strong');
price = getFloat(priceItem.text());
if (isNaN(price)) {
priceItem = $(this);
price = getFloat(priceItem.text());
}
}
}
if (isNaN(price)) return;
var title = null;
var index = 0;
$(this).parent().find('.p-scroll .ps-wrap .ps-main .ps-item a').each(function(idx) {
if ($(this).attr('class') === 'curr' && $(this).attr('title')) {
title = $(this).attr('title').trim();
index = idx;
return false;
}
});
var unit = getUnit(title, price);
if (unit === null && index === 0) {
title = $(this).parent().find('.p-name a em').text().trim();
if (!title) {
title = $(this).parent().find('.p-name a').text().trim();
}
unit = getUnit(title, price);
}
if (unit === null) return;
var htm = ' (' + unit.price + '/' + unit.unit + ')';
title = '( 助手估重: ' + unit.capacity + unit.unit + ' = ' + unit.tip + ' )\n' + title;
priceItem.append(htm);
$(this).attr('priceCapacity', unit.capacity);
$(this).attr('priceUnit', unit.unit);
addPlusListPriceTip.call(this, '.price-plus-1');
addPlusListPriceTip.call(this, '.price-sams-1');
var tipItem = $(this).parent().find('.p-name a');
setTimeout(function() {
tipItem.attr('title', title);
}, 1000);
}
function addPlusListPriceTip(tag) {
var plusItem = $(this).find(tag);
if (plusItem.length === 0) return;
var priceItem = plusItem.find('em');
var price = getFloat(priceItem.text());
if (isNaN(price)) return;
var cap = parseFloat($(this).attr('priceCapacity'));
if (isNaN(cap)) return;
var unit = $(this).attr('priceUnit');
price = Math.round(parseFloat(price) / cap * 100) / 100;
var htm = ' (' + price + '/' + unit + ')';
plusItem.insertAfter($(this));
plusItem.css({'display':'block'});
priceItem.append(htm);
}
function addListPriceButton() {
var button = $(this).find('#priceTipButton');
if (button.length > 0) return;
if(!$(this).text().trim()) return;
var isEnabled = window.priceTipEnabled;
button = $('<a id="priceTipButton" href="javascript:;"' + (isEnabled? ' class="curr"': '') + '><span class="fs-tit">单价助手</span></a>');
$(this).append(button);
button.click(function() {
var nextEnabled = !window.priceTipEnabled;
GM_setValue('jd_price_tip_enabled', nextEnabled);
window.priceTipEnabled = nextEnabled;
$(this).attr('class', (nextEnabled? 'curr': ''));
SEARCH.sort(getQueryString('psort'));
});
}
function addItemPriceTip() {
if (!window.priceTipEnabled) return;
var priceItem = $(this).find('.price');
var price = getFloat(priceItem.text());
if (isNaN(price)) return;
var title = $('.sku-name').text().trim();
var unit = getUnit(title, price);
if (unit === null) return;
var htm = ' (' + unit.price + '/' + unit.unit + ')';
title = ' ( 助手估重: ' + unit.capacity + unit.unit + ' = ' + unit.tip + ' )';
priceItem.append(htm);
if (!window.hasAddItemPriceTip) {
window.hasAddItemPriceTip = true;
setTimeout(function() {
$('#summary-weight .dd').append(title);
$('#summary-weight').css({'display':'block'});
}, 1000);
}
}
function getUnit(title, price) {
if (!title) return null;
if (price <= 0) return null;
//处理包含：和送的情况
if (title.match(/：|[)）】]送/)){
var titles = title.split(/：|[)）】]送/);
for (var t=0; t<titles.length; ++t) {
var res = getUnit(titles[t], price);
if (res) return res;
}
}
var regQuant = "个只瓶罐听桶提卷包袋件盒箱组副份盆盘碗支";
var regWeigh = "g|kg|ml|l|千克|克|斤|公斤|毫升|升";
var regFloat = "\\d+\\.?\\d*?(?:\\s*-\\s*\\d+\\.?\\d*?)?";
//处理有总重量的情况
var reg0 = new RegExp('(?:[总净]重量?约?|\\s约)\\s*('+regFloat+')\\s*('+regWeigh+')', 'g');
var pos0 = {i: 0, pCap: 1, pUnit: 2, pCount: 3};
//处理数量前置的情况
var reg1 = new RegExp('(\\d+)\\s*['+regQuant+']?\\s*[*x×'+regQuant+']\\s*('+regFloat+')\\s*('+regWeigh+')', 'ig');
var pos1 = {i: 1, pCap: 2, pUnit: 3, pCount: 1};
//处理数量后置的情况
var reg2 = new RegExp('('+regFloat+')\\s*('+regWeigh+')(?:\\s*\\/?[\\u4e00-\\u9fa5]*)((?:\\s*[*x×'+regQuant+']\\s*\\d+[\\u4e00-\\u9fa5]?)*)', 'ig');
var pos2 = {i: 2, pCap: 1, pUnit: 2, pCount: 3};
var reg, pos;
//处理有括号的情况
var name = title.replace(/[(（【][^)）】]+?(\)|）|】|$)/g, '');
if (reg0.test(title)) {
name = title; reg = reg0; pos = pos0;
} else if (reg1.test(name)) {
reg = reg1; pos = pos1;
} else if (reg2.test(name)) {
reg = reg2; pos = pos2;
} else if (reg1.test(title)) {
name = title; reg = reg1; pos = pos1;
} else {
name = title; reg = reg2; pos = pos2;
}
//处理套装的情况
var isOnlyOne = !/[+＋送和]/i.test(name);
var match = null;
var cap = 0, count = 0, lastMul = 1;
var un = '', tip = '';
reg.lastIndex = 0;
while ((match = reg.exec(name))) {
var capacity;
var caps = match[pos.pCap].split('-');
if (caps.length == 2) {
capacity = (parseFloat(caps[0].trim()) + parseFloat(caps[1].trim()))/2;
} else {
capacity = parseFloat(match[pos.pCap].trim());
}
if (match.length > 3 && match[pos.pCount]) {
var multiple = match[pos.pCount].match(/\d+/g);
if (multiple) for (var i=0; i<multiple.length; ++i) {
lastMul = parseInt(multiple[i]);
capacity *= lastMul;
}
}
if (capacity <= 0) {
continue;
}
var unit = match[pos.pUnit].toLowerCase();
if (unit === 'g' || unit === '克') {
capacity /= 1000;
unit = 'kg';
} else if (unit === '千克' || unit === '公斤') {
unit = 'kg';
} else if (unit === '斤') {
capacity /= 2;
unit = 'kg';
} else if (unit === 'ml' || unit === '毫升') {
capacity /= 1000;
unit = 'L';
} else if (unit === 'l' || unit === '升') {
unit = 'L';
}
if (un === '' || un === unit) {
//处理重复出现的情况
if (isOnlyOne) {
if (capacity > cap) {
tip = ''; cap = 0; count = 0;
} else {
continue;
}
}
un = unit;
tip += match[0] + ' ';
cap += capacity;
++count;
}
}
//处理数量在其他位置的情况
if (count == 1 && pos.i !== 0) {
var regZhn = '两一二三四五六七八九十';
var regMul = '(?:[^*x×满\\d])\\s*(\\d+|['+regZhn+'])['+regQuant+'](?!\\d+折|松)';
reg = new RegExp(regMul, 'i');
match = reg.exec(title);
if (match) {
var mul = regZhn.indexOf(match[1]);
if (mul == -1) mul = parseInt(match[1]);
else if (mul === 0) mul = 2;
if (lastMul != mul) {
cap *= mul;
tip += match[0].substr(1, match[0].length-1).trim();
}
}
}
if (cap > 0) {
var unitPrice = parseFloat(price) / cap;
//如果单价>1000元或<1元，太大或太小不显示
if (unitPrice > 1000 || unitPrice < 1) return null;
else return {
capacity: Math.round(cap * 10000) / 10000,
unit: un,
price: Math.round(unitPrice * 100) / 100,
tip: tip.trim()
};
} else return null;
}
function getFloat(str) {
str = str.replace('￥','').trim();
if (!/^\d+\.?\d*$/.test(str)) return NaN;
return parseFloat(str);
}
function getQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)", "i");
var r = window.location.search.substr(1).match(reg);
if (r !== null) return unescape(r[2]); return '';
}