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jTemplates模板学习笔记

2015-10-30 13:39 501 查看

1、jTemplates工作方式

1）setTemplateElement：指定可处理的模板对象

2）processTemplate：对模板化的对象进行数据处理

2、语法解析

1）jTemplates包含了三个预定义全局变量：$T、$P、$Q

$T：为模板提供数据调用功能

$P：为模板提供参数变量调用功能

$Q：$Q.version提供当前jTemplates的版本

2）jTemplates标签

【#if】标签

#if 语法

{#if |COND|}..{#elseif |COND|}..{#else}..{#/if}
#if 示例:
{#if $T.hello} hello world. {#/if}
{#if 2*8==16} good {#else} fail {#/if}
{#if $T.age>=18)} 成人了 {#else} 未成年 {#/if}
{#if $T.list_id == 3} System list {#elseif $T.list_id == 4} Users List {#elseif $T.list_id == 5} Errors list {#/if}

【#foreach】标签

{#foreach |VAR| as |NAME| [begin=|CODE|] [count=|CODE|] [step=|CODE|]}..{#else}..{#/for}
#foreach 示例：
默认：{#foreach $T.table as record} {$T.record.name} {#/for}
指定起始位置：{#foreach $T.table as record begin=1} {$T.record.name} {#/for}
指定起始和循环次数：{#foreach $T.table as record begin=1 count=2} {$T.record.name} {#/for}
指定步长：{#foreach $T.table as record step=2} {$T.record.name} {#/for}
#foreach 内定环境变量：
$index - index of element in table
$iteration - id of iteration (next number begin from 0)
$first - is first iteration?
$last - is last iteration?
$total - total number of iterations
$key - key in object (name of element) (0.6.0+)
$typeof - type of element (0.6.0+)
#foreach 示例所需要的数据：
var data = {
name: 'User list',
list_id: 4,
table: [
{id: 1, name: 'Anne', age: 22, mail: 'anne@domain.com'},
{id: 2, name: 'Amelie', age: 24, mail: 'amelie@domain.com'},
{id: 3, name: 'Polly', age: 18, mail: 'polly@domain.com'},
{id: 4, name: 'Alice', age: 26, mail: 'alice@domain.com'},
{id: 5, name: 'Martha', age: 25, mail: 'martha@domain.com'}
]
};
(0.7.0+)版以后新增的功能，支持待循环集合用函数代替：
{#foreach |FUNC| as |NAME| [begin=|CODE|] [end=|CODE|] [count=|CODE|] [step=|CODE|]}..{#else}..{#/for}
例：
f = function(step) {
if(step > 100) return null; // stop if loop is too long
return "Step " + step;
};

$("#result").setTemplate("{#foreach f as funcValue begin=10 end=20} {$T.funcValue}<br/> {#/for}");
$("#result").processTemplate();
#foreach在每次循环时请求的就是f函数，然后传递参数给f使用，并返回结果给funcValue变量

【#cycle】标签

{#cycle values=|ARRAY|}
功能：提供周期性的调用，在循环中实现交替样式功能时可用到
示例：
{#cycle values=[1,2,3,4]}
下面模板在执行循环时，就会周期性的调用#cycle数组中的值，这样就能实现行交替的效果:
<table width=\"200\">
{#foreach $T.table as row}
<tr bgcolor=\"{#cycle values=['#AAAAAA','#CCCCCC']}\">
<td>{$T.row.name.link('mailto:'+$T.row.mail)}</td>
</tr>
{#/for}
</table>

【#include】标签

{#include |NAME| [root=|VAR|]}
功能：提供子模板调用
示例：
{#template MAIN}
{* this is comment *}
{$T} {* $T == $T.toSource() *}
<table>
{#foreach $T.table as record}
{#include ROW root=$T.record}
{#/for}
</table>
{#/template MAIN}

{#template ROW}
<tr class="values=['bcEEC','bcCEE']} {#cycle">
<td>{$T.name}</td>
<td>{$T.mail}</td>
</tr>
{#/template ROW}
说明：{#template MAIN} 是指定模板的主要部分，必不可少。
{#template ROW}是定义一个名为“ROW”的子模板。
{#include ROW root=$T.record}是主模板调用“ROW”子模板，并传递参数$T.record

【#param】标签

{#param name=|NAME| value=|CODE|}
功能：定义模板内的局部变量参数，使用$P调用。
示例：
$("#result").setTemplate("{#param name=x value=888}{$P.x}");
$("#result").processTemplate();
输出结果：888
示例：
$("#result").setTemplate("{#param name=x value=$P.x+1}{$P.x}");
$("#result").setParam('x', 777);
$("#result").processTemplate();
输出结果：778
示例：
$("#result").setTemplate("<ul>{#foreach $T.table as row}<li>{$P.x} {$T.row.name}</li>{#param name=x value=$P.x+3}{#/for}<ul>");
$("#result").setParam('x', 1);
$("#result").processTemplate(data);
需要数据：
var data = {
name: 'User list',
list_id: 4,
table: [
{id: 1, name: 'Anne', age: 22, mail: 'anne@domain.com'},
{id: 2, name: 'Amelie', age: 24, mail: 'amelie@domain.com'},
{id: 3, name: 'Polly', age: 18, mail: 'polly@domain.com'},
{id: 4, name: 'Alice', age: 26, mail: 'alice@domain.com'},
{id: 5, name: 'Martha', age: 25, mail: 'martha@domain.com'}
]
};
输出结果：
# 1 Anne
# 4 Amelia
# 7 Polly
# 10 Alice
# 13 Martha

案例1：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JTemplates模板测试demo01</title>
<script type="text/javascript" src="js/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="js/jquery-jtemplates.js"></script>

<script type="text/javascript">
$(document).ready(function () {
//初始化JSON数据
var jsonData = {
name : '用户列表',
list_id : '070101061',
table : [
{id: 1, name: '马韶华', age: 22, mail: '616059480@qq.com'},
{id: 2, name: '皮特', age: 24, mail: 'cssrain@domain.com'},
{id: 3, name: '卡卡', age: 20, mail: 'cssrain@domain.com'},
{id: 4, name: '戏戏', age: 26, mail: 'cssrain@domain.com'},
{id: 5, name: '一揪', age: 25, mail: 'cssrain@domain.com'}
]
};
//附加模板
$("#result").setTemplateElement("jTemplates");
//给模板加载数据
$("#result").processTemplate(jsonData);
});

</script>
</head>

<body>
<!-- 模板内容 -->
<textarea id="jTemplates" style="display:none">
<strong>{$T.name} : {$T.list_id}</strong>
<table border=1>
<tr>
<th>编号</th>
<th>姓名</th>
<th>年龄</th>
<th>邮箱</th>
</tr>
{#foreach $T.table as record}
<tr>
<td>{$T.record.id}</td>
<td>{$T.record.name}</td>
<td>{$T.record.age}</td>
<td>{$T.record.mail}</td>
</tr>
{#/for}
</table>
</textarea>

<div id="result" />

</body>
</html>

案例2：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JTemplates模板测试demo02</title>
<script type="text/javascript" src="js/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="js/jquery-jtemplates.js"></script>
<link rel="stylesheet" href="css/style.css" />
<script type="text/javascript">
$(document).ready(function () {
$("#CustomersList").setTemplateElement("jTemplates_list");
$("#CustomersList").setParam("year", "2012");
$("#CustomersList").processTemplateURL("js/data.json");

$("#CustomerDetails").setTemplateElement("jTemplates_details");
});

function showDeatils(cust) {
$("#CustomerDetails").processTemplate(cust);
}

</script>
</head>

<body>
<!-- 模板内容 -->
<textarea id="jTemplates_list" style="display:none">
{#template MAIN}
<table>
<tr class="color:{#cycle values=['#ffffff', '#dddddd']}">
<td class="header">Details</td>
<td class="header">Name</td>
<td class="header">Age</td>
</tr>
{#foreach $T.Customers as Customer}
{#include ROW root=$T.Customer}
{#/for}
</table>
{#/template MAIN}

{#template ROW}
<tr class="color:{#cycle values=['#ffffff', '#dddddd']}">
<td><a href="#" onclick="showDeatils({#var $T})">选择</td>
<td>{$T.FirstName} - {$T.LastName}</td>
<td>{$P.year} - {$T.Born}</td>
</tr>
{#/template ROW}
</textarea>

<textarea id="jTemplates_details" style="display:none">
<table>
<tr><td class="header">First Name</td><td>{$T.FirstName}</td></tr>
<tr><td class="header">Last Name</td><td>{$T.LastName}</td></tr>
<tr><td class="header">Born</td><td>{$T.Born}</td></tr>
<tr><td class="header">E-mail</td><td>{$T.Email.link('mailto:'+$T.Email)}</td></tr>
</table>
</textarea>

<!-- Output elements -->
<div id="CustomersList" class="Content"></div>
<div id="CustomerDetails" class="Content"></div>
</body>
</html>

案例3：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JTemplates模板测试demo03</title>
<script type="text/javascript" src="js/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="js/jquery-jtemplates.js"></script>
<link rel="stylesheet" href="css/style.css" />
<script type="text/javascript">
$(document).ready(function () {

$.getJSON('js/data.json', function(data) {
var Items = data.Items;
var Bom = Items[0].BOM; //sample data
$("#ItemBOM").setTemplateElement("jTemplates_list");
$("#ItemBOM").processTemplate(Bom);
});
});

</script>
</head>

<body>
<!-- 模板内容 -->
<textarea id="jTemplates_list" style="display:none">
{#template MAIN}
<h3>BOM : {$T.Name}</h3>
<div>
{#include ROW root=$T.Elements}
</div>
{#/template MAIN}

{#template ROW}
<ul>
{#foreach $T as entry}
<li>{$T.entry.Name} - {$T.entry.Qty}</li>
{#if $T.entry.Elements}
{#include ROW root=$T.entry.Elements}
{#/if}
{#/for}
</ul>
{#/template ROW}
</textarea>

<!-- Output elements -->
<div id="ItemBOM" class="Content"></div>
</body>
</html>

案例4：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>JTemplates模板测试demo03</title>
<script type="text/javascript" src="js/jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="js/jquery-jtemplates.js"></script>
<link rel="stylesheet" href="css/style.css" />
<script type="text/javascript">
var customers = null;
var items = null;
var salesEntry = null;
$(document).ready(function () {
$.getJSON("js/data.json", function (data) {
customers = data.Customers;
items = data.Items;
salesEntry = data.SalesEntry;

$("#customers").setTemplateElement("template_list_customers");
$("#customers").processTemplate(customers);

$("#items").setTemplateElement("template_list_items").processTemplate(items);
$("#entries").setTemplateElement("template_list_entries").processTemplate(null);
});

});

function updateCustomer(customer, index) {
customers[index].selected = customer.checked;
updateEntries();
}

function updateItem(item, index) {
items[index].selected = item.checked;
updateEntries();
}

function updateEntries() {
var custCacheMap = {};
var itemCacheMap = {};

for(var i=0; i<customers.length; ++i) {
custCacheMap[customers[i].ID] = customers[i];
}

for(var i=0; i<items.length; ++i) {
itemCacheMap[items[i].ID] = items[i];
}

var entries = $.map(salesEntry, function (e) {
var cust = custCacheMap[e.CustomerID];
var item = itemCacheMap[e.ItemID];

if(cust == null || item == null) {
return null;
}

if(cust.selected && item.selected) {
return [{
"CustName": cust.FirstName + ' ' + cust.LastName,
"ItemName": item.Name,
"Price": e.SalesPrice,
"Cost": e.UnitCost
}];
} else {
return null;
}
});

$("#entries").processTemplate(entries);
}

</script>
</head>

<body>
<!-- 模板内容 -->
<p style="display:none;">
<textarea id="template_list_customers" rows="0" cols="0">
<div class="title">Customers</div>
<table>
<tr style="values=['yellow', 'green']}">
<td class="header">Choose</td>
<td class="header">Name</td>
</tr>
{#foreach $T as record}
<tr style="values=['yellow', 'green']}">
<td><input type="checkbox" value="{$T.record.ID}" onclick="updateCustomer(this, {$T.record$index})"></td>
<td>{$T.record.FirstName} {$T.record.LastName}</td>
</tr>
{#/for}
</table>
</textarea>
</p>

<p style="display:none">
<textarea id="template_list_items" rows="0" cols="0">
<div class="title">Items</div>
<table>
<tr style="values=['yellow', 'green']}">
<td class="header">Choose</td>
<td class="header">Name</td>
</tr>
{#foreach $T as record}
<tr style="values=['yellow', 'green']}">
<td><input type="checkbox" value="{$T.record.ID}" onclick="updateItem(this, {$T.record$index})"></td>
<td>{$T.record.Name}</td>
</tr>
{#/for}
</table>
</textarea>
</p>

<p style="display:none;">
<textarea id="template_list_entries" rows="0" cols="0">
<div class="title">Entries</div>
<table>
<tr>
<td class="header">Customer</td>
<td class="header">Item</td>
<td class="header">Price</td>
<td class="header">Cost</td>
<td class="header">Profit</td>
</tr>
{#param name=totalNum value=0}
{#foreach $T as record}
<tr style="values=['yellow', 'green']}">
<td>{$T.record.CustName}</td>
<td>{$T.record.ItemName}</td>
<td>{$T.record.Price}</td>
<td>{$T.record.Cost}</td>
<td>{$T.record.Price - $T.record.Cost}</td>
</tr>
{#param name=totalNum value=$P.totalNum + ($T.record.Price - $T.record.Cost)}
<tr>
<td class="header"></td>
<td class="header"></td>
<td class="header"></td>
<td class="header">Total:</td>
<td class="header">{$P.totalNum}</td>
</tr>
{#/for}
</table>
</textarea>
</p>

<div id="customers"></div>
<div id="items"></div>
<div id="entries"></div>
</body>
</html>

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