jquery-jsrender使用
JsRender是一款基于jQuery的JavaScript模版引擎
特点：
· 简单直观
· 功能强大
· 可扩展的
· 快如闪电
jsrender使用比较简单，本文简单结束一些常用的
使用过程：
1. 下载并导入相关js库（最后提供三个js源文件的源码copy，可直接使用）
<script src="jsrender/jquery-1.8.0.min.js" type="text/javascript" charset="utf-8"></script>
<script src="jsrender/jsrender.js" type="text/javascript" charset="utf-8"></script>
<script src="jsrender/jsrender.min.js" type="text/javascript" charset="utf-8"></script>
2.在页面中定义script快，并定义script的id和type类型为text/x-jsrender的。
例
<script id="testTmpl" type="text/x-jsrender">
<tr>
jsrender代码
</tr>
</script>
此时jsrender模版基本完成，接下来介绍使用
3.js/jqueryton通过调用jsrender的templates函数渲染使用
例：
<script type="text/javascript" charset="utf-8">
$(function(){
var dataSrouce = [{}];//定义数据 //几种渲染数据
// 第一种(直接渲染)
//var html = $("#testTmpl").render(dataSrouce);
// 第二种(直接templates指定渲染)
//var html = $.templates("#testTmpl").render(dataSrouce);
// 第三种(复制渲染)
$.templates("personTmpl", "#testTmpl");
var html = $.render.personTmpl(dataSrouce);
// list为页面需要加载到哪个标签下的标签id
$("#list").append(html);
});
</script>
以下看一个完整实列
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script src="jsrender/jquery-1.8.0.min.js" type="text/javascript" charset="utf-8"></script>
<script src="jsrender/jsrender.js" type="text/javascript" charset="utf-8"></script>
<script src="jsrender/jsrender.min.js" type="text/javascript" charset="utf-8"></script>
</head> <body>
<div>
<table width="800" border="1">
<thead>
<tr>
<th width="10%">序号</th>
<th width="30%">姓名</th>
<th width="80%">家庭成员</th>
</tr>
</thead>
<tbody id="list"> </tbody>
</table>
</div>
</body>
</html>
<script id="testTmpl" type="text/x-jsrender">
<tr>
<td>{{:#index + 1}}</td>
<td>{{:name}}</td>
<td>
{{for family}}
{{:#data}}
{{/for}}
</td>
</tr>
</script>
<script type="text/javascript" charset="utf-8">
$(function(){
var dataSrouce = [{
name: "张三",
family: [
"爸爸",
"妈妈",
"哥哥"
]
},{
name: "李四",
family: [
"爷爷",
"奶奶",
"叔叔"
]
}]; //几种渲染数据
// 第一种(直接渲染)
//var html = $("#testTmpl").render(dataSrouce);
// 第二种(直接templates指定渲染)
//var html = $.templates("#testTmpl").render(dataSrouce);
// 第三种(复制渲染)
$.templates("personTmpl", "#testTmpl");
var html = $.render.personTmpl(dataSrouce); $("#list").append(html);
});
</script>
图列
jsrender的各种标签或关键子的使用
1.jsrender快中通过键值对的方式使用
2.取值情况
{{:x}}取属性
{{for x}} 循环遍历
{{:#data}}相当this
{{:#parent}} 属性的父级
{{:#index}} 当前属性的位置下标,0开始
jsrender其他的一些使用
1.for循环时定义参数，相当于设置父级变量直接访问
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>嵌套循环使用参数访问父级数据 --- by 杨元</title>
<style>
</style> </head>
<body> <div>
<table>
<thead>
<tr>
<th width="10%">序号</th>
<th width="10%">姓名</th>
<th width="80%">家庭成员</th>
</tr>
</thead>
<tbody id="list"> </tbody>
</table>
</div> <script src="jquery.min.js"></script>
<script src="jsviews.js"></script> <!-- 定义JsRender模版 -->
<script id="testTmpl" type="text/x-jsrender">
<tr>
<td>{{:#index + 1}}</td>
<td>{{:name}}</td>
<td>
{{!-- 使用for循环时，可以在后边添加参数，参数必须以~开头，多个参数用空格分隔 --}}
{{!-- 通过参数，我们缓存了父级的数据，在子循环中通过访问参数，就可以间接访问父级数据 --}}
{{for family ~parentIndex=#index ~parentName=name}}
<b>{{:~parentIndex + 1}}.{{:#index + 1}}</b>
{{!-- #data相当于this --}}
{{:~parentName}}的{{:#data}}
{{/for}}
</td>
</tr>
</script> <script>
//数据源
var dataSrouce = [{
name: "张三",
family: [
"爸爸",
"妈妈",
"哥哥"
]
},{
name: "李四",
family: [
"爷爷",
"奶奶",
"叔叔"
]
}]; //渲染数据
var html = $("#testTmpl").render(dataSrouce);
$("#list").append(html); </script> </body>
</html>
2.自定义标签，同时也可以支持自定义标签时支持else
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>自定义标签中使用else --- by 杨元</title>
<style>
</style> </head>
<body> <div>
<table>
<thead>
<tr>
<th width="50%">名称</th>
<th width="50%">单价</th>
</tr>
</thead>
<tbody id="list"> </tbody>
</table>
</div> <script src="jquery.min.js"></script>
<script src="jsviews.js"></script> <!-- 定义JsRender模版 -->
<script id="testTmpl" type="text/x-jsrender">
<tr>
<td>{{:name}}</td>
<td>
{{!-- isShow为自定义标签，price是传入的参数，status是附加属性 --}}
{{isShow price status=0}}
{{:price}}
{{else price status=1}}
--
{{/isShow}}
</td>
</tr>
</script> <script>
//数据源
var dataSrouce = [{
name: "苹果",
price: 108
},{
name: "鸭梨",
price: 370
},{
name: "桃子",
price: 99
},{
name: "菠萝",
price: 371
},{
name: "橘子",
price: 153
}]; //自定义标签
$.views.tags({
"isShow": function(price){
var temp=price+''.split(''); if(this.tagCtx.props.status === 0){
//判断价格是否为水仙花数，如果是，则显示，否则不显示
if(price==(Math.pow(parseInt(temp[0],10),3)+Math.pow(parseInt(temp[1],10),3)+Math.pow(parseInt(temp[2],10),3))){
return this.tagCtxs[0].render();
}else{
return this.tagCtxs[1].render();
}
}else{
return "";
} }
}); //渲染数据
var html = $("#testTmpl").render(dataSrouce);
$("#list").append(html); </script> </body>
</html>
3.自定义标签使用
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>用helper代替自定义标签 --- by 杨元</title>
<style>
</style> </head>
<body> <div>
<table>
<thead>
<tr>
<th width="50%">名称</th>
<th width="50%">单价</th>
</tr>
</thead>
<tbody id="list"> </tbody>
</table>
</div> <script src="jquery.min.js"></script>
<script src="jsviews.js"></script> <!-- 定义JsRender模版 -->
<script id="testTmpl" type="text/x-jsrender">
<tr>
<td>{{:name}}</td>
<td>
{{!-- 利用原生的if做分支跳转，利用helper做逻辑处理 --}}
{{if ~isShow(price)}}
{{:price}}
{{else}}
--
{{/if}}
</td>
</tr>
</script> <script>
//数据源
var dataSrouce = [{
name: "苹果",
price: 108
},{
name: "鸭梨",
price: 370
},{
name: "桃子",
price: 99
},{
name: "菠萝",
price: 371
},{
name: "橘子",
price: 153
}]; //Helper
$.views.helpers({
"isShow": function(price){
var temp=price+''.split('');
if(price==(Math.pow(parseInt(temp[0],10),3)+Math.pow(parseInt(temp[1],10),3)+Math.pow(parseInt(temp[2],10),3))){
return true;
}else{
return false;
}
}
}); //渲染数据
var html = $("#testTmpl").render(dataSrouce);
$("#list").append(html); </script> </body>
</html>
jquery-1.8.0.min.js
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jsrender.js
/*! JsRender v1.0.0-beta: http://www.jsviews.com/#jsrender
informal pre V1.0 commit counter: 64*/
/*
* Optimized version of jQuery Templates, for rendering to string.
* Does not require jQuery, or HTML DOM
* Integrates with JsViews (http://www.jsviews.com/#jsviews)
*
* Copyright 2015, Boris Moore
* Released under the MIT License.
*/ //jshint -W018, -W041 (function (factory) {
if (typeof define === 'function' && define.amd) {
// Loading from AMD script loader. Register as an anonymous module.
define(factory);
} else if (typeof exports === 'object') {
// CommonJS
var jsrender = module.exports = factory(true, require("fs")); // jsrender = jsviews.views jsrender.renderFile = jsrender.__express = function(filepath, data, callback) { // Support for rendering templates from file
// system in Node.js Node, and for Express template engine integration, using app.engine('html', jsrender.__express);
var html = jsrender.templates("@" + filepath).render(data);
if (callback) {
callback(null, html);
}
return html;
};
} else {
// Browser using plain <script> tag
factory(false);
}
} (function (isCommonJS, fs) {
"use strict"; isCommonJS = isCommonJS === true; //========================== Top-level vars ========================== var versionNumber = "v1.0.0-beta", // global is the this object, which is window when running in the usual browser environment.
global = (0, eval)('this'), // jshint ignore:line $ = global.jQuery, jsvStoreName, rTag, rTmplString, topView, //TODO tmplFnsCache = {}, document = global.document, delimOpenChar0 = "{", delimOpenChar1 = "{", delimCloseChar0 = "}", delimCloseChar1 = "}", linkChar = "^", rPath = /^(!*?)(?:null|true|false|\d[\d.]*|([\w$]+|\.|~([\w$]+)|#(view|([\w$]+))?)([\w$.^]*?)(?:[.[^]([\w$]+)\]?)?)$/g,
// not object helper view viewProperty pathTokens leafToken rParams = /(\()(?=\s*\()|(?:([([])\s*)?(?:(\^?)(!*?[#~]?[\w$.^]+)?\s*((\+\+|--)|\+|-|&&|\|\||===|!==|==|!=|<=|>=|[<>%*:?\/]|(=))\s*|(!*?[#~]?[\w$.^]+)([([])?)|(,\s*)|(\(?)\\?(?:(')|("))|(?:\s*(([)\]])(?=\s*[.^]|\s*$|[^\(\[])|[)\]])([([]?))|(\s+)/g,
// lftPrn0 lftPrn bound path operator err eq path2 prn comma lftPrn2 apos quot rtPrn rtPrnDot prn2 space
// (left paren? followed by (path? followed by operator) or (path followed by left paren?)) or comma or apos or quot or right paren or space isRenderCall,
rNewLine = /[ \t]*(\r\n|\n|\r)/g,
rUnescapeQuotes = /\\(['"])/g,
rEscapeQuotes = /['"\\]/g, // Escape quotes and \ character
rBuildHash = /(?:\x08|^)(onerror:)?(?:(~?)(([\w$_\.]+):)?([^\x08]+))\x08(,)?([^\x08]+)/gi,
rTestElseIf = /^if\s/,
rFirstElem = /<(\w+)[>\s]/,
rAttrEncode = /[\x00`><"'&]/g, // Includes > encoding since rConvertMarkers in JsViews does not skip > characters in attribute strings
rIsHtml = /[\x00`><\"'&]/,
rHasHandlers = /^on[A-Z]|^convert(Back)?$/,
rHtmlEncode = rAttrEncode,
autoTmplName = 0,
viewId = 0,
charEntities = {
"&": "&",
"<": "<",
">": ">",
"\x00": "",
"'": "'",
'"': """,
"`": "`"
},
HTML = "html",
OBJECT = "object",
tmplAttr = "data-jsv-tmpl",
indexStr = "For #index in nested block use #getIndex().",
$render = {},
jsvStores = {
template: {
compile: compileTmpl
},
tag: {
compile: compileTag
},
helper: {},
converter: {}
}, // jsviews object ($.views if jQuery is loaded)
$views = {
jsviews: versionNumber,
settings: function(settings) {
$extend($viewsSettings, settings);
dbgMode($viewsSettings._dbgMode);
if ($viewsSettings.jsv) {
$viewsSettings.jsv();
}
},
sub: {
// subscription, e.g. JsViews integration
View: View,
Err: JsViewsError,
tmplFn: tmplFn,
parse: parseParams,
extend: $extend,
syntaxErr: syntaxError,
onStore: {},
_ths: tagHandlersFromProps,
_tg: function() {} // Constructor for tagDef
},
map: dataMap, // If jsObservable loaded first, use that definition of dataMap
_cnvt: convertVal,
_tag: renderTag,
_err: error
}, jsViewsPrev = global.jsviews; function getDerivedMethod(baseMethod, method) {
return function () {
var ret,
tag = this,
prevBase = tag.base; tag.base = baseMethod; // Within method call, calling this.base will call the base method
ret = method.apply(tag, arguments); // Call the method
tag.base = prevBase; // Replace this.base to be the base method of the previous call, for chained calls
return ret;
};
} function getMethod(baseMethod, method) {
// For derived methods (or handlers declared declaratively as in {{:foo onChange=~fooChanged}} replace by a derived method, to allow using this.base(...)
// or this.baseApply(arguments) to call the base implementation. (Equivalent to this._super(...) and this._superApply(arguments) in jQuery UI)
if ($isFunction(method)) {
method = getDerivedMethod(
!baseMethod
? noop // no base method implementation, so use noop as base method
: baseMethod._d
? baseMethod // baseMethod is a derived method, so us it
: getDerivedMethod(noop, baseMethod), // baseMethod is not derived so make its base method be the noop method
method
);
method._d = 1; // Add flag that this is a derived method
}
return method;
} function tagHandlersFromProps(tag, tagCtx) {
for (var prop in tagCtx.props) {
if (rHasHandlers.test(prop)) {
tag[prop] = getMethod(tag[prop], tagCtx.props[prop]);
// Copy over the onFoo props, convert and convertBack from tagCtx.props to tag (overrides values in tagDef).
// Note: unsupported scenario: if handlers are dynamically added ^onFoo=expression this will work, but dynamically removing will not work.
}
}
} function retVal(val) {
return val;
} function noop() {
return "";
} function dbgBreak(val) {
// Usage examples: {{dbg:...}}, {{:~dbg(...)}}, {{for ... onAfterLink=~dbg}}, {{dbg .../}} etc.
// To break here, stop on caught exceptions.
try {
debugger;
throw "dbg breakpoint";
}
catch (e) {}
return this.base ? this.baseApply(arguments) : val;
} function dbgMode(debugMode) {
$viewsSettings._dbgMode = debugMode !== false; // Pass in false to unset. Otherwise sets to true.
} function JsViewsError(message) {
// Error exception type for JsViews/JsRender
// Override of $.views.sub.Error is possible
this.name = ($.link ? "JsViews" : "JsRender") + " Error";
this.message = message || this.name;
} function $extend(target, source) {
var name;
for (name in source) {
target[name] = source[name];
}
return target;
} (JsViewsError.prototype = new Error()).constructor = JsViewsError; //========================== Top-level functions ========================== //===================
// jsviews.delimiters
//===================
function $viewsDelimiters(openChars, closeChars, link) {
// Set the tag opening and closing delimiters and 'link' character. Default is "{{", "}}" and "^"
// openChars, closeChars: opening and closing strings, each with two characters if (this !== 0 || openChars) {
delimOpenChar0 = openChars ? openChars.charAt(0) : delimOpenChar0; // Escape the characters - since they could be regex special characters
delimOpenChar1 = openChars ? openChars.charAt(1) : delimOpenChar1;
delimCloseChar0 = closeChars ? closeChars.charAt(0) : delimCloseChar0;
delimCloseChar1 = closeChars ? closeChars.charAt(1) : delimCloseChar1;
linkChar = link || linkChar;
openChars = "\\" + delimOpenChar0 + "(\\" + linkChar + ")?\\" + delimOpenChar1; // Default is "{^{"
closeChars = "\\" + delimCloseChar0 + "\\" + delimCloseChar1; // Default is "}}"
// Build regex with new delimiters
// tag (followed by / space or }) or cvtr+colon or html or code
rTag = "(?:(?:(\\w+(?=[\\/\\s\\" + delimCloseChar0 + "]))|(?:(\\w+)?(:)|(>)|!--((?:[^-]|-(?!-))*)--|(\\*)))"
+ "\\s*((?:[^\\" + delimCloseChar0 + "]|\\" + delimCloseChar0 + "(?!\\" + delimCloseChar1 + "))*?)"; // make rTag available to JsViews (or other components) for parsing binding expressions
$sub.rTag = rTag + ")"; rTag = new RegExp(openChars + rTag + "(\\/)?|(?:\\/(\\w+)))" + closeChars, "g"); // Default: bind tag converter colon html comment code params slash closeBlock
// /{(\^)?{(?:(?:(\w+(?=[\/\s}]))|(?:(\w+)?(:)|(>)|!--((?:[^-]|-(?!-))*)--|(\*)))\s*((?:[^}]|}(?!}))*?)(\/)?|(?:\/(\w+)))}}/g rTmplString = new RegExp("<.*>|([^\\\\]|^)[{}]|" + openChars + ".*" + closeChars);
// rTmplString looks for html tags or { or } char not preceded by \\, or JsRender tags {{xxx}}. Each of these strings are considered
// NOT to be jQuery selectors
}
return [delimOpenChar0, delimOpenChar1, delimCloseChar0, delimCloseChar1, linkChar];
} //=========
// View.get
//========= function getView(inner, type) { //view.get(inner, type)
if (!type) {
// view.get(type)
type = inner;
inner = undefined;
} var views, i, l, found,
view = this,
root = !type || type === "root";
// If type is undefined, returns root view (view under top view). if (inner) {
// Go through views - this one, and all nested ones, depth-first - and return first one with given type.
found = view.type === type ? view : undefined;
if (!found) {
views = view.views;
if (view._.useKey) {
for (i in views) {
if (found = views[i].get(inner, type)) {
break;
}
}
} else {
for (i = 0, l = views.length; !found && i < l; i++) {
found = views[i].get(inner, type);
}
}
}
} else if (root) {
// Find root view. (view whose parent is top view)
while (view.parent.parent) {
found = view = view.parent;
}
} else {
while (view && !found) {
// Go through views - this one, and all parent ones - and return first one with given type.
found = view.type === type ? view : undefined;
view = view.parent;
}
}
return found;
} function getNestedIndex() {
var view = this.get("item");
return view ? view.index : undefined;
} getNestedIndex.depends = function() {
return [this.get("item"), "index"];
}; function getIndex() {
return this.index;
} getIndex.depends = "index"; //==========
// View.hlp
//========== function getHelper(helper) {
// Helper method called as view.hlp(key) from compiled template, for helper functions or template parameters ~foo
var wrapped,
view = this,
ctx = view.linkCtx,
res = (view.ctx || {})[helper]; if (res === undefined && ctx && ctx.ctx) {
res = ctx.ctx[helper];
}
if (res === undefined) {
res = $helpers[helper];
} if (res) {
if ($isFunction(res) && !res._wrp) {
// If it is of type function, and not already wrapped, we will wrap it, so if called with no this pointer it will be called with the
// view as 'this' context. If the helper ~foo() was in a data-link expression, the view will have a 'temporary' linkCtx property too.
// Note that helper functions on deeper paths will have specific this pointers, from the preceding path.
// For example, ~util.foo() will have the ~util object as 'this' pointer
wrapped = function() {
return res.apply((!this || this === global) ? view : this, arguments);
};
wrapped._wrp = true;
$extend(wrapped, res); // Attach same expandos (if any) to the wrapped function
}
}
return wrapped || res;
} //==============
// jsviews._cnvt
//============== function convertVal(converter, view, tagCtx, onError) {
// self is template object or linkCtx object
var tag, value,
// if tagCtx is an integer, then it is the key for the compiled function to return the boundTag tagCtx
boundTag = typeof tagCtx === "number" && view.tmpl.bnds[tagCtx-1],
linkCtx = view.linkCtx; // For data-link="{cvt:...}"... if (onError !== undefined) {
tagCtx = onError = {props: {}, args: [onError]};
} else if (boundTag) {
tagCtx = boundTag(view.data, view, $views);
} value = tagCtx.args[0];
if (converter || boundTag) {
tag = linkCtx && linkCtx.tag;
if (!tag) {
tag = $extend(new $sub._tg(), {
_: {
inline: !linkCtx,
bnd: boundTag,
unlinked: true
},
tagName: ":",
cvt: converter,
flow: true,
tagCtx: tagCtx,
});
if (linkCtx) {
linkCtx.tag = tag;
tag.linkCtx = linkCtx;
}
tagCtx.ctx = extendCtx(tagCtx.ctx, (linkCtx ? linkCtx.view : view).ctx);
}
tag._er = onError && value;
tagHandlersFromProps(tag, tagCtx); tagCtx.view = view; tag.ctx = tagCtx.ctx || {};
tagCtx.ctx = undefined;
// Provide this tag on view, for addBindingMarkers on bound tags to add the tag to view._.bnds, associated with the tag id,
view._.tag = tag; value = tag.cvtArgs(tag.convert || converter !== "true" && converter)[0]; // If there is a convertBack but no convert, converter will be "true" // Call onRender (used by JsViews if present, to add binding annotations around rendered content)
value = boundTag && view._.onRender
? view._.onRender(value, view, boundTag)
: value;
view._.tag = undefined;
}
return value != undefined ? value : "";
} function convertArgs(converter) {
var tag = this,
tagCtx = tag.tagCtx,
view = tagCtx.view,
args = tagCtx.args; converter = tag.convert || converter;
converter = converter && ("" + converter === converter
? (view.getRsc("converters", converter) || error("Unknown converter: '" + converter + "'"))
: converter); args = !args.length && !tagCtx.index // On the opening tag with no args, bind to the current data context
? [view.data]
: converter
? args.slice() // If there is a converter, use a copy of the tagCtx.args array for rendering, and replace the args[0] in
// the copied array with the converted value. But we do not modify the value of tag.tagCtx.args[0] (the original args array)
: args; // If no converter, get the original tagCtx.args if (converter) {
if (converter.depends) {
tag.depends = $sub.getDeps(tag.depends, tag, converter.depends, converter);
}
args[0] = converter.apply(tag, args);
}
return args;
} //=============
// jsviews._tag
//============= function getResource(resourceType, itemName) {
var res, store,
view = this;
while ((res === undefined) && view) {
store = view.tmpl && view.tmpl[resourceType];
res = store && store[itemName];
view = view.parent;
}
return res || $views[resourceType][itemName];
} function renderTag(tagName, parentView, tmpl, tagCtxs, isUpdate, onError) {
parentView = parentView || topView;
var tag, tag_, tagDef, template, tags, attr, parentTag, i, l, itemRet, tagCtx, tagCtxCtx, content, callInit, mapDef, thisMap, args, props, initialTmpl,
ret = "",
linkCtx = parentView.linkCtx || 0,
ctx = parentView.ctx,
parentTmpl = tmpl || parentView.tmpl,
// if tagCtx is an integer, then it is the key for the compiled function to return the boundTag tagCtxs
boundTag = typeof tagCtxs === "number" && parentView.tmpl.bnds[tagCtxs-1]; if (tagName._is === "tag") {
tag = tagName;
tagName = tag.tagName;
tagCtxs = tag.tagCtxs;
template = tag.template;
} else {
tagDef = parentView.getRsc("tags", tagName) || error("Unknown tag: {{" + tagName + "}} ");
template = tagDef.template;
} if (onError !== undefined) {
ret += onError;
tagCtxs = onError = [{props: {}, args: []}];
} else if (boundTag) {
tagCtxs = boundTag(parentView.data, parentView, $views);
} l = tagCtxs.length;
for (i = 0; i < l; i++) {
tagCtx = tagCtxs[i];
if (!linkCtx || !linkCtx.tag || i && !linkCtx.tag._.inline || tag._er) {
// Initialize tagCtx
// For block tags, tagCtx.tmpl is an integer > 0
if (content = tagCtx.tmpl) {
content = tagCtx.content = parentTmpl.tmpls[content - 1];
}
tagCtx.index = i;
tagCtx.tmpl = template || content; // Set the tmpl property to the content of the block tag
tagCtx.render = renderContent;
tagCtx.view = parentView;
tagCtx.ctx = extendCtx(tagCtx.ctx, ctx); // Clone and extend parentView.ctx
}
if (tmpl = tagCtx.props.tmpl) {
// If the tmpl property is overridden, set the value (when initializing, or, in case of binding: ^tmpl=..., when updating)
tmpl = "" + tmpl === tmpl // if a string
? parentView.getRsc("templates", tmpl) || $templates(tmpl)
: tmpl; tagCtx.tmpl = tmpl;
} if (!tag) {
// This will only be hit for initial tagCtx (not for {{else}}) - if the tag instance does not exist yet
// Instantiate tag if it does not yet exist
// If the tag has not already been instantiated, we will create a new instance.
// ~tag will access the tag, even within the rendering of the template content of this tag.
// From child/descendant tags, can access using ~tag.parent, or ~parentTags.tagName
tag = new tagDef._ctr();
callInit = !!tag.init; tag.parent = parentTag = ctx && ctx.tag;
tag.tagCtxs = tagCtxs; if (linkCtx) {
tag._.inline = false;
linkCtx.tag = tag;
tag.linkCtx = linkCtx;
}
if (tag._.bnd = boundTag || linkCtx.fn) {
// Bound if {^{tag...}} or data-link="{tag...}"
tag._.arrVws = {};
} else if (tag.dataBoundOnly) {
error("{^{" + tagName + "}} tag must be data-bound");
} //TODO better perf for childTags() - keep child tag.tags array, (and remove child, when disposed)
// tag.tags = [];
}
tagCtx.tag = tag;
if (tag.dataMap && tag.tagCtxs) {
tagCtx.map = tag.tagCtxs[i].map; // Copy over the compiled map instance from the previous tagCtxs to the refreshed ones
}
if (!tag.flow) {
tagCtxCtx = tagCtx.ctx = tagCtx.ctx || {}; // tags hash: tag.ctx.tags, merged with parentView.ctx.tags,
tags = tag.parents = tagCtxCtx.parentTags = ctx && extendCtx(tagCtxCtx.parentTags, ctx.parentTags) || {};
if (parentTag) {
tags[parentTag.tagName] = parentTag;
//TODO better perf for childTags: parentTag.tags.push(tag);
}
tags[tag.tagName] = tagCtxCtx.tag = tag;
}
}
if (boundTag || linkCtx) {
// Provide this tag on view, for addBindingMarkers on bound tags to add the tag to view._.bnds, associated with the tag id
parentView._.tag = tag;
}
if (!(tag._er = onError)) {
tagHandlersFromProps(tag, tagCtxs[0]);
tag.rendering = {}; // Provide object for state during render calls to tag and elses. (Used by {{if}} and {{for}}...)
for (i = 0; i < l; i++) {
tagCtx = tag.tagCtx = tag.tagCtxs[i];
props = tagCtx.props;
args = tag.cvtArgs(); if (mapDef = props.dataMap || tag.dataMap) {
if (args.length || props.dataMap) {
thisMap = tagCtx.map;
if (!thisMap || thisMap.src !== args[0] || isUpdate) {
if (thisMap && thisMap.src) {
thisMap.unmap(); // only called if observable map - not when only used in JsRender, e.g. by {{props}}
}
thisMap = tagCtx.map = mapDef.map(args[0], props);
}
args = [thisMap.tgt];
}
}
tag.ctx = tagCtx.ctx; if (!i) {
if (callInit) {
initialTmpl = tag.template;
tag.init(tagCtx, linkCtx, tag.ctx);
callInit = undefined;
if (tag.template !== initialTmpl) {
tag._.tmpl = tag.template; // This will override the tag.template and also tagCtx.props.tmpl for all tagCtxs
}
}
if (linkCtx) {
// Set attr on linkCtx to ensure outputting to the correct target attribute.
// Setting either linkCtx.attr or this.attr in the init() allows per-instance choice of target attrib.
linkCtx.attr = tag.attr = linkCtx.attr || tag.attr;
}
attr = tag.attr;
tag._.noVws = attr && attr !== HTML;
} itemRet = undefined;
if (tag.render) {
itemRet = tag.render.apply(tag, args);
}
if (!args.length) {
args = [parentView]; // no arguments - get data context from view.
}
if (itemRet === undefined) {
itemRet = tagCtx.render(args.length ? args[0] : parentView, true) || (isUpdate ? undefined : "");
}
// No return value from render, and no template/content tagCtx.render(...), so return undefined
ret = ret ? ret + (itemRet || "") : itemRet; // If no rendered content, this will be undefined
}
tag.rendering = undefined;
}
tag.tagCtx = tag.tagCtxs[0];
tag.ctx = tag.tagCtx.ctx; if (tag._.noVws) {
if (tag._.inline) {
// inline tag with attr set to "text" will insert HTML-encoded content - as if it was element-based innerText
ret = attr === "text"
? $converters.html(ret)
: "";
}
}
return boundTag && parentView._.onRender
// Call onRender (used by JsViews if present, to add binding annotations around rendered content)
? parentView._.onRender(ret, parentView, boundTag)
: ret;
} //=================
// View constructor
//================= function View(context, type, parentView, data, template, key, contentTmpl, onRender) {
// Constructor for view object in view hierarchy. (Augmented by JsViews if JsViews is loaded)
var views, parentView_, tag, self_,
self = this,
isArray = type === "array"; self.content = contentTmpl;
self.views = isArray ? [] : {};
self.parent = parentView;
self.type = type || "top";
self.data = data;
self.tmpl = template;
// If the data is an array, this is an 'array view' with a views array for each child 'item view'
// If the data is not an array, this is an 'item view' with a views 'hash' object for any child nested views
// ._.useKey is non zero if is not an 'array view' (owning a data array). Use this as next key for adding to child views hash
self_ = self._ = {
key: 0,
useKey: isArray ? 0 : 1,
id: "" + viewId++,
onRender: onRender,
bnds: {}
};
self.linked = !!onRender;
if (parentView) {
views = parentView.views;
parentView_ = parentView._;
if (parentView_.useKey) {
// Parent is an 'item view'. Add this view to its views object
// self._key = is the key in the parent view hash
views[self_.key = "_" + parentView_.useKey++] = self;
self.index = indexStr;
self.getIndex = getNestedIndex;
tag = parentView_.tag;
self_.bnd = isArray && (!tag || !!tag._.bnd && tag); // For array views that are data bound for collection change events, set the
// view._.bnd property to true for top-level link() or data-link="{for}", or to the tag instance for a data-bound tag, e.g. {^{for ...}}
} else if (views.length === (self_.key = self.index = key)) { // Parent is an 'array view'. Add this view to its views array
views.push(self); // Use push when possible (better perf than splice)
} else {
views.splice(key, 0, self);
}
// If no context was passed in, use parent context
// If context was passed in, it should have been merged already with parent context
self.ctx = context || parentView.ctx;
} else {
self.ctx = context;
}
} View.prototype = {
get: getView,
getIndex: getIndex,
getRsc: getResource,
hlp: getHelper,
_is: "view"
}; //=============
// Registration
//============= function compileChildResources(parentTmpl) {
var storeName, resources, resourceName, resource, settings, compile, onStore;
for (storeName in jsvStores) {
settings = jsvStores[storeName];
if ((compile = settings.compile) && (resources = parentTmpl[storeName + "s"])) {
for (resourceName in resources) {
// compile child resource declarations (templates, tags, tags["for"] or helpers)
resource = resources[resourceName] = compile(resourceName, resources[resourceName], parentTmpl, 0);
resource._is = storeName; // Only do this for compiled objects (tags, templates...)
if (resource && (onStore = $sub.onStore[storeName])) {
// e.g. JsViews integration
onStore(resourceName, resource, compile);
}
}
}
}
} function compileTag(name, tagDef, parentTmpl) {
var tmpl, baseTag, prop,
compiledDef = new $sub._tg(); function Tag() {
var tag = this;
tag._ = {
inline: true,
unlinked: true
}; tag.tagName = name;
} if ($isFunction(tagDef)) {
// Simple tag declared as function. No presenter instantation.
tagDef = {
depends: tagDef.depends,
render: tagDef
};
} else if ("" + tagDef === tagDef) {
tagDef = {template: tagDef};
}
if (baseTag = tagDef.baseTag) {
tagDef.flow = !!tagDef.flow; // Set flow property, so defaults to false even if baseTag has flow=true
tagDef.baseTag = baseTag = "" + baseTag === baseTag
? (parentTmpl && parentTmpl.tags[baseTag] || $tags[baseTag])
: baseTag; compiledDef = $extend(compiledDef, baseTag); for (prop in tagDef) {
compiledDef[prop] = getMethod(baseTag[prop], tagDef[prop]);
}
} else {
compiledDef = $extend(compiledDef, tagDef);
} // Tag declared as object, used as the prototype for tag instantiation (control/presenter)
if ((tmpl = compiledDef.template) !== undefined) {
compiledDef.template = "" + tmpl === tmpl ? ($templates[tmpl] || $templates(tmpl)) : tmpl;
}
if (compiledDef.init !== false) {
// Set init: false on tagDef if you want to provide just a render method, or render and template, but no constuctor or prototype.
// so equivalent to setting tag to render function, except you can also provide a template.
(Tag.prototype = compiledDef).constructor = compiledDef._ctr = Tag;
} if (parentTmpl) {
compiledDef._parentTmpl = parentTmpl;
}
return compiledDef;
} function baseApply(args) {
// In derived method (or handler declared declaratively as in {{:foo onChange=~fooChanged}} can call base method,
// using this.baseApply(arguments) (Equivalent to this._superApply(arguments) in jQuery UI)
return this.base.apply(this, args);
} function compileTmpl(name, tmpl, parentTmpl, options) {
// tmpl is either a template object, a selector for a template script block, the name of a compiled template, or a template object //==== nested functions ====
function lookupTemplate(value) {
// If value is of type string - treat as selector, or name of compiled template
// Return the template object, if already compiled, or the markup string
var currentName;
if (("" + value === value) || value.nodeType > 0 && (elem = value)) {
if (!elem) {
if (value.charAt(0) === "@") {
// tmpl="@file.path"
if (fs) {
// node.js - load template file from the file system
// Consider supporting/using async version with callback: fs.readFile(path, {encoding: "utf8"}, callback);
value = $templates[name = name || (value = fs.realpathSync(value.slice(1)))] // If the template is not named, use "@file.path" as name.
= $templates[name]
|| compileTmpl(name, fs.readFileSync(value, "utf8"), parentTmpl, options);
} else {
// On the client, so look for server-generated script block with id "@file.path"
elem = document.getElementById(value);
}
} else if ($.fn && !rTmplString.test(value)) {
try {
elem = $(document).find(value)[0]; // if jQuery is loaded, test for selector returning elements, and get first element
} catch (e) {}
}
}
if (elem) {
// Generally this is a script element.
// However we allow it to be any element, so you can for example take the content of a div,
// use it as a template, and replace it by the same content rendered against data.
// e.g. for linking the content of a div to a container, and using the initial content as template:
// $.link("#content", model, {tmpl: "#content"});
if (options) {
// We will compile a new template using the markup in the script element
value = elem.innerHTML;
} else {
// We will cache a single copy of the compiled template, and associate it with the name
// (renaming from a previous name if there was one).
if ((currentName = elem.getAttribute(tmplAttr)) && (value = $templates[currentName]) && name !== currentName) {
delete $templates[currentName];
}
name = name || currentName || "_" + autoTmplName++;
if (!currentName) {
// Not already compiled and cached, so compile and cache the name
// Create a name for compiled template if none provided
value = compileTmpl(name, elem.innerHTML, parentTmpl, options);
}
elem.setAttribute(tmplAttr, name);
$templates[value.tmplName = name] = value;
}
elem = undefined;
}
} else if (!value.fn) {
value = undefined;
// If value is not a string. HTML element, or compiled template, return undefined
}
return value;
} var elem, compiledTmpl,
tmplOrMarkup = tmpl = tmpl || ""; //==== Compile the template ====
if (options === 0) {
options = undefined;
tmplOrMarkup = lookupTemplate(tmplOrMarkup); // Top-level compile so do a template lookup
} // If options, then this was already compiled from a (script) element template declaration.
// If not, then if tmpl is a template object, use it for options
options = options || (tmpl.markup ? tmpl : {});
options.tmplName = name;
if (parentTmpl) {
options._parentTmpl = parentTmpl;
}
// If tmpl is not a markup string or a selector string, then it must be a template object
// In that case, get it from the markup property of the object
if (!tmplOrMarkup && tmpl.markup && (tmplOrMarkup = lookupTemplate(tmpl.markup))) {
if (tmplOrMarkup.fn) {
// If the string references a compiled template object, need to recompile to merge any modified options
tmplOrMarkup = tmplOrMarkup.markup;
}
}
if (tmplOrMarkup !== undefined) {
if (tmplOrMarkup.fn || tmpl.fn) {
// tmpl is already compiled, so use it
if (tmplOrMarkup.fn) {
compiledTmpl = tmplOrMarkup;
}
} else {
// tmplOrMarkup is a markup string, not a compiled template
// Create template object
tmpl = tmplObject(tmplOrMarkup, options);
// Compile to AST and then to compiled function
tmplFn(tmplOrMarkup.replace(rEscapeQuotes, "\\$&"), tmpl);
}
if (!compiledTmpl) {
compileChildResources(options); compiledTmpl = $extend(function() {
return tmpl.render.apply(tmpl, arguments);
}, tmpl);
}
if (name && !parentTmpl) {
$render[name] = compiledTmpl;
}
return compiledTmpl;
}
} function dataMap(mapDef) {
function Map(source, options) {
this.tgt = mapDef.getTgt(source, options);
} if ($isFunction(mapDef)) {
// Simple map declared as function
mapDef = {
getTgt: mapDef
};
} if (mapDef.baseMap) {
mapDef = $extend($extend({}, mapDef.baseMap), mapDef);
} mapDef.map = function(source, options) {
return new Map(source, options);
};
return mapDef;
} //==== /end of function compile ==== function tmplObject(markup, options) {
// Template object constructor
var htmlTag,
wrapMap = $viewsSettings.wrapMap || {}, // Only used in JsViews. Otherwise empty: {}
tmpl = $extend(
{
tmpls: [],
links: {}, // Compiled functions for link expressions
bnds: [],
_is: "template",
render: renderContent
},
options
); tmpl.markup = markup;
if (!options.htmlTag) {
// Set tmpl.tag to the top-level HTML tag used in the template, if any...
htmlTag = rFirstElem.exec(markup);
tmpl.htmlTag = htmlTag ? htmlTag[1].toLowerCase() : "";
}
htmlTag = wrapMap[tmpl.htmlTag];
if (htmlTag && htmlTag !== wrapMap.div) {
// When using JsViews, we trim templates which are inserted into HTML contexts where text nodes are not rendered (i.e. not 'Phrasing Content').
// Currently not trimmed for <li> tag. (Not worth adding perf cost)
tmpl.markup = $.trim(tmpl.markup);
} return tmpl;
} function registerStore(storeName, storeSettings) { function theStore(name, item, parentTmpl) {
// The store is also the function used to add items to the store. e.g. $.templates, or $.views.tags // For store of name 'thing', Call as:
// $.views.things(items[, parentTmpl]),
// or $.views.things(name, item[, parentTmpl]) var onStore, compile, itemName, thisStore; if (name && typeof name === OBJECT && !name.nodeType && !name.markup && !name.getTgt) {
// Call to $.views.things(items[, parentTmpl]), // Adding items to the store
// If name is a hash, then item is parentTmpl. Iterate over hash and call store for key.
for (itemName in name) {
theStore(itemName, name[itemName], item);
}
return $views;
}
// Adding a single unnamed item to the store
if (item === undefined) {
item = name;
name = undefined;
}
if (name && "" + name !== name) { // name must be a string
parentTmpl = item;
item = name;
name = undefined;
}
thisStore = parentTmpl ? parentTmpl[storeNames] = parentTmpl[storeNames] || {} : theStore;
compile = storeSettings.compile;
if (item === null) {
// If item is null, delete this entry
if (name) {
delete thisStore[name];
}
} else {
item = compile ? compile(name, item, parentTmpl, 0) : item;
if (name) {
thisStore[name] = item;
}
}
if (compile && item) {
item._is = storeName; // Only do this for compiled objects (tags, templates...)
}
if (item && (onStore = $sub.onStore[storeName])) {
// e.g. JsViews integration
onStore(name, item, compile);
}
return item;
} var storeNames = storeName + "s"; $views[storeNames] = theStore;
} //==============
// renderContent
//============== function renderContent(data, context, noIteration, parentView, key, onRender) {
var i, l, tag, tmpl, tagCtx, isTopRenderCall, prevData, prevIndex,
view = parentView,
result = ""; if (context === true) {
noIteration = context; // passing boolean as second param - noIteration
context = undefined;
} else if (typeof context !== OBJECT) {
context = undefined; // context must be a boolean (noIteration) or a plain object
} if (tag = this.tag) {
// This is a call from renderTag or tagCtx.render(...)
tagCtx = this;
tmpl = tag._.tmpl || tagCtx.tmpl;
view = view || tagCtx.view;
if (!arguments.length) {
data = view;
}
} else {
// This is a template.render(...) call
tmpl = this;
} if (tmpl) {
if (!view && data && data._is === "view") {
view = data; // When passing in a view to render or link (and not passing in a parent view) use the passed-in view as parentView
} if (view) {
if (data === view) {
// Inherit the data from the parent view.
// This may be the contents of an {{if}} block
data = view.data;
}
} if (!tmpl.fn) {
// Template has not been compiled yet, so compile it.
tmpl = tag._.tmpl = $templates[tmpl] || $templates(tmpl);
} isRenderCall = isRenderCall || (isTopRenderCall = !view);
if (!view) {
(context = context || {}).root = data; // Provide ~root as shortcut to top-level data.
}
if (!isRenderCall || tmpl.useViews) {
result = renderWithViews(tmpl, data, context, noIteration, view, key, onRender, tag);
} else {
if (view) { // In a block
prevData = view.data;
prevIndex = view.index;
view.index = indexStr;
} else {
view = topView;
view.data = data;
view.ctx = context;
}
if ($isArray(data) && !noIteration) {
// Create a view for the array, whose child views correspond to each data item. (Note: if key and parentView are passed in
// along with parent view, treat as insert -e.g. from view.addViews - so parentView is already the view item for array)
for (i = 0, l = data.length; i < l; i++) {
view.index = i;
view.data = data[i];
result += tmpl.fn(data[i], view, $views);
}
} else {
result += tmpl.fn(data, view, $views);
}
view.data = prevData;
view.index = prevIndex;
}
if (isTopRenderCall) {
isRenderCall = undefined;
}
}
return result;
} function renderWithViews(tmpl, data, context, noIteration, view, key, onRender, tag) {
function setItemVar(item) {
// When itemVar is specified, set modified ctx with user-named ~item
newCtx = $extend({}, context);
newCtx[itemVar] = item;
} // Render template against data as a tree of subviews (nested rendered template instances), or as a string (top-level template).
// If the data is the parent view, treat as noIteration, re-render with the same data context.
var i, l, newView, childView, itemResult, swapContent, contentTmpl, outerOnRender, tmplName, itemVar, newCtx, tagCtx,
result="" ; if (tag) {
// This is a call from renderTag or tagCtx.render(...)
tmplName = tag.tagName;
tagCtx = tag.tagCtx;
context = context ? extendCtx(context, tag.ctx) : tag.ctx;
contentTmpl = tagCtx.content;
if (tagCtx.props.link === false) {
// link=false setting on block tag
// We will override inherited value of link by the explicit setting link=false taken from props
// The child views of an unlinked view are also unlinked. So setting child back to true will not have any effect.
context = context || {};
context.link = false;
}
if (itemVar = tagCtx.props.itemVar) {
if (itemVar.charAt(0) !== "~") {
syntaxError("Use itemVar='~myItem'");
}
itemVar = itemVar.slice(1);
}
} if (view) {
contentTmpl = contentTmpl || view.content; // The wrapped content - to be added as #content property on views, below
onRender = onRender || view._.onRender;
context = context || view.ctx;
} if (key === true) {
swapContent = true;
key = 0;
} // If link===false, do not call onRender, so no data-linking marker nodes
if (onRender && (context && context.link === false || tag && tag._.noVws)) {
onRender = undefined;
}
outerOnRender = onRender;
if (onRender === true) {
// Used by view.refresh(). Don't create a new wrapper view.
outerOnRender = undefined;
onRender = view._.onRender;
}
// Set additional context on views created here, (as modified context inherited from the parent, and to be inherited by child views)
context = tmpl.helpers
? extendCtx(tmpl.helpers, context)
: context; newCtx = context;
if ($isArray(data) && !noIteration) {
// Create a view for the array, whose child views correspond to each data item. (Note: if key and view are passed in
// along with parent view, treat as insert -e.g. from view.addViews - so view is already the view item for array)
newView = swapContent
? view
: (key !== undefined && view)
|| new View(context, "array", view, data, tmpl, key, contentTmpl, onRender);
if (itemVar) {
newView.it = itemVar;
}
itemVar = newView.it;
for (i = 0, l = data.length; i < l; i++) {
// Create a view for each data item.
if (itemVar) {
setItemVar(data[i]); // use modified ctx with user-named ~item
}
childView = new View(newCtx, "item", newView, data[i], tmpl, (key || 0) + i, contentTmpl, onRender); itemResult = tmpl.fn(data[i], childView, $views);
result += newView._.onRender ? newView._.onRender(itemResult, childView) : itemResult;
}
} else {
// Create a view for singleton data object. The type of the view will be the tag name, e.g. "if" or "myTag" except for
// "item", "array" and "data" views. A "data" view is from programmatic render(object) against a 'singleton'.
if (itemVar) {
setItemVar(data);
}
newView = swapContent ? view : new View(newCtx, tmplName || "data", view, data, tmpl, key, contentTmpl, onRender);
if (tag && !tag.flow) {
newView.tag = tag;
}
result += tmpl.fn(data, newView, $views);
}
return outerOnRender ? outerOnRender(result, newView) : result;
} //===========================
// Build and compile template
//=========================== // Generate a reusable function that will serve to render a template against data
// (Compile AST then build template function) function error(e, view, fallback) {
var message = $viewsSettings.onError(e, view, fallback);
if ("" + e === e) { // if e is a string, not an Exception, then throw new Exception
throw new $sub.Err(message);
}
return !view.linkCtx && view.linked ? $converters.html(message) : message;
} function syntaxError(message) {
error("Syntax error\n" + message);
} function tmplFn(markup, tmpl, isLinkExpr, convertBack, hasElse) {
// Compile markup to AST (abtract syntax tree) then build the template function code from the AST nodes
// Used for compiling templates, and also by JsViews to build functions for data link expressions //==== nested functions ====
function pushprecedingContent(shift) {
shift -= loc;
if (shift) {
content.push(markup.substr(loc, shift).replace(rNewLine, "\\n"));
}
} function blockTagCheck(tagName, block) {
if (tagName) {
tagName += '}}';
// '{{include}} block has {{/for}} with no open {{for}}'
syntaxError((
block
? '{{' + block + '}} block has {{/' + tagName + ' without {{' + tagName
: 'Unmatched or missing {{/' + tagName) + ', in template:\n' + markup);
}
} function parseTag(all, bind, tagName, converter, colon, html, comment, codeTag, params, slash, closeBlock, index) { // bind tag converter colon html comment code params slash closeBlock
// /{(\^)?{(?:(?:(\w+(?=[\/\s}]))|(?:(\w+)?(:)|(>)|!--((?:[^-]|-(?!-))*)--|(\*)))\s*((?:[^}]|}(?!}))*?)(\/)?|(?:\/(\w+)))}}/g
// Build abstract syntax tree (AST): [tagName, converter, params, content, hash, bindings, contentMarkup]
if (html) {
colon = ":";
converter = HTML;
}
slash = slash || isLinkExpr && !hasElse; var pathBindings = (bind || isLinkExpr) && [[]],
props = "",
args = "",
ctxProps = "",
paramsArgs = "",
paramsProps = "",
paramsCtxProps = "",
onError = "",
useTrigger = "",
// Block tag if not self-closing and not {{:}} or {{>}} (special case) and not a data-link expression
block = !slash && !colon && !comment; //==== nested helper function ====
tagName = tagName || (params = params || "#data", colon); // {{:}} is equivalent to {{:#data}}
pushprecedingContent(index);
loc = index + all.length; // location marker - parsed up to here
if (codeTag) {
if (allowCode) {
content.push(["*", "\n" + params.replace(/^:/, "ret+= ").replace(rUnescapeQuotes, "$1") + ";\n"]);
}
} else if (tagName) {
if (tagName === "else") {
if (rTestElseIf.test(params)) {
syntaxError('for "{{else if expr}}" use "{{else expr}}"');
}
pathBindings = current[7] && [[]];
current[8] = markup.substring(current[8], index); // contentMarkup for block tag
current = stack.pop();
content = current[2];
block = true;
}
if (params) {
// remove newlines from the params string, to avoid compiled code errors for unterminated strings
parseParams(params.replace(rNewLine, " "), pathBindings, tmpl)
.replace(rBuildHash, function(all, onerror, isCtx, key, keyToken, keyValue, arg, param) {
key = "'" + keyToken + "':";
if (arg) {
args += keyValue + ",";
paramsArgs += "'" + param + "',";
} else if (isCtx) {
ctxProps += key + keyValue + ",";
paramsCtxProps += key + "'" + param + "',";
} else if (onerror) {
onError += keyValue;
} else {
if (keyToken === "trigger") {
useTrigger += keyValue;
}
props += key + keyValue + ",";
paramsProps += key + "'" + param + "',";
hasHandlers = hasHandlers || rHasHandlers.test(keyToken);
}
return "";
}).slice(0, -1);
} if (pathBindings && pathBindings[0]) {
pathBindings.pop(); // Remove the bindings that was prepared for next arg. (There is always an extra one ready).
} newNode = [
tagName,
converter || !!convertBack || hasHandlers || "",
block && [],
parsedParam(paramsArgs, paramsProps, paramsCtxProps),
parsedParam(args, props, ctxProps),
onError,
useTrigger,
pathBindings || 0
];
content.push(newNode);
if (block) {
stack.push(current);
current = newNode;
current[8] = loc; // Store current location of open tag, to be able to add contentMarkup when we reach closing tag
}
} else if (closeBlock) {
blockTagCheck(closeBlock !== current[0] && current[0] !== "else" && closeBlock, current[0]);
current[8] = markup.substring(current[8], index); // contentMarkup for block tag
current = stack.pop();
}
blockTagCheck(!current && closeBlock);
content = current[2];
}
//==== /end of nested functions ==== var result, newNode, hasHandlers,
allowCode = $viewsSettings.allowCode || tmpl && tmpl.allowCode,
astTop = [],
loc = 0,
stack = [],
content = astTop,
current = [,,astTop]; if (allowCode) {
tmpl.allowCode = allowCode;
} //TODO result = tmplFnsCache[markup]; // Only cache if template is not named and markup length < ...,
//and there are no bindings or subtemplates?? Consider standard optimization for data-link="a.b.c"
// if (result) {
// tmpl.fn = result;
// } else { // result = markup;
if (isLinkExpr) {
markup = delimOpenChar0 + markup + delimCloseChar1;
} blockTagCheck(stack[0] && stack[0][2].pop()[0]);
// Build the AST (abstract syntax tree) under astTop
markup.replace(rTag, parseTag); pushprecedingContent(markup.length); if (loc = astTop[astTop.length - 1]) {
blockTagCheck("" + loc !== loc && (+loc[8] === loc[8]) && loc[0]);
}
// result = tmplFnsCache[markup] = buildCode(astTop, tmpl);
// } if (isLinkExpr) {
result = buildCode(astTop, markup, isLinkExpr);
setPaths(result, [astTop[0][7]]); // With data-link expressions, pathBindings array is astTop[0][7]
} else {
result = buildCode(astTop, tmpl);
}
return result;
} function setPaths(fn, pathsArr) {
var key, paths,
i = 0,
l = pathsArr.length;
fn.deps = [];
for (; i < l; i++) {
paths = pathsArr[i];
for (key in paths) {
if (key !== "_jsvto" && paths[key].length) {
fn.deps = fn.deps.concat(paths[key]); // deps is the concatenation of the paths arrays for the different bindings
}
}
}
fn.paths = paths; // The array of paths arrays for the different bindings
} function parsedParam(args, props, ctx) {
return [args.slice(0, -1), props.slice(0, -1), ctx.slice(0, -1)];
} function paramStructure(parts, type) {
return '\n\t'
+ (type
? type + ':{'
: '')
+ 'args:[' + parts[0] + ']'
+ (parts[1] || !type
? ',\n\tprops:{' + parts[1] + '}'
: "")
+ (parts[2] ? ',\n\tctx:{' + parts[2] + '}' : "");
} function parseParams(params, pathBindings, tmpl) { function parseTokens(all, lftPrn0, lftPrn, bound, path, operator, err, eq, path2, prn, comma, lftPrn2, apos, quot, rtPrn, rtPrnDot, prn2, space, index, full) {
// /(\()(?=\s*\()|(?:([([])\s*)?(?:(\^?)(!*?[#~]?[\w$.^]+)?\s*((\+\+|--)|\+|-|&&|\|\||===|!==|==|!=|<=|>=|[<>%*:?\/]|(=))\s*|(!*?[#~]?[\w$.^]+)([([])?)|(,\s*)|(\(?)\\?(?:(')|("))|(?:\s*(([)\]])(?=\s*[.^]|\s*$|\s)|[)\]])([([]?))|(\s+)/g,
// lftPrn0 lftPrn bound path operator err eq path2 prn comma lftPrn2 apos quot rtPrn rtPrnDot prn2 space
// (left paren? followed by (path? followed by operator) or (path followed by paren?)) or comma or apos or quot or right paren or space
bound = bindings && bound;
if (bound && !eq) {
path = bound + path; // e.g. some.fn(...)^some.path - so here path is "^some.path"
}
operator = operator || "";
lftPrn = lftPrn || lftPrn0 || lftPrn2;
path = path || path2;
// Could do this - but not worth perf cost?? :-
// if (!path.lastIndexOf("#data.", 0)) { path = path.slice(6); } // If path starts with "#data.", remove that.
prn = prn || prn2 || ""; var expr, exprFn, binds, theOb, newOb; function parsePath(allPath, not, object, helper, view, viewProperty, pathTokens, leafToken) {
// rPath = /^(?:null|true|false|\d[\d.]*|(!*?)([\w$]+|\.|~([\w$]+)|#(view|([\w$]+))?)([\w$.^]*?)(?:[.[^]([\w$]+)\]?)?)$/g,
// none object helper view viewProperty pathTokens leafToken
var subPath = object === ".";
if (object) {
path = path.slice(not.length);
if (!subPath) {
allPath = (helper
? 'view.hlp("' + helper + '")'
: view
? "view"
: "data")
+ (leafToken
? (viewProperty
? "." + viewProperty
: helper
? ""
: (view ? "" : "." + object)
) + (pathTokens || "")
: (leafToken = helper ? "" : view ? viewProperty || "" : object, "")); allPath = allPath + (leafToken ? "." + leafToken : ""); allPath = not + (allPath.slice(0, 9) === "view.data"
? allPath.slice(5) // convert #view.data... to data...
: allPath);
}
if (bindings) {
binds = named === "linkTo" ? (bindto = pathBindings._jsvto = pathBindings._jsvto || []) : bndCtx.bd;
if (theOb = subPath && binds[binds.length-1]) {
if (theOb._jsv) {
while (theOb.sb) {
theOb = theOb.sb;
}
if (theOb.bnd) {
path = "^" + path.slice(1);
}
theOb.sb = path;
theOb.bnd = theOb.bnd || path.charAt(0) === "^";
}
} else {
binds.push(path);
}
pathStart[parenDepth] = index + (subPath ? 1 : 0);
}
}
return allPath;
} if (err && !aposed && !quoted) {
syntaxError(params);
} else {
if (bindings && rtPrnDot && !aposed && !quoted) {
// This is a binding to a path in which an object is returned by a helper/data function/expression, e.g. foo()^x.y or (a?b:c)^x.y
// We create a compiled function to get the object instance (which will be called when the dependent data of the subexpression changes, to return the new object, and trigger re-binding of the subsequent path)
if (!named || boundName || bindto) {
expr = pathStart[parenDepth - 1];
if (full.length - 1 > index - (expr || 0)) { // We need to compile a subexpression
expr = full.slice(expr, index + all.length);
if (exprFn !== true) { // If not reentrant call during compilation
binds = bindto || bndStack[parenDepth-1].bd;
// Insert exprOb object, to be used during binding to return the computed object
theOb = binds[binds.length-1];
if (theOb && theOb.prm) {
while (theOb.sb && theOb.sb.prm) {
theOb = theOb.sb;
}
newOb = theOb.sb = {path: theOb.sb, bnd: theOb.bnd};
} else {
binds.push(newOb = {path: binds.pop()}); // Insert exprOb object, to be used during binding to return the computed object
} // (e.g. "some.object()" in "some.object().a.b" - to be used as context for binding the following tokens "a.b")
}
rtPrnDot = delimOpenChar1 + ":" + expr // The parameter or function subexpression
+ " onerror=''" // set onerror='' in order to wrap generated code with a try catch - returning '' as object instance if there is an error/missing parent
+ delimCloseChar0;
exprFn = tmplLinks[rtPrnDot];
if (!exprFn) {
tmplLinks[rtPrnDot] = true; // Flag that this exprFn (for rtPrnDot) is being compiled
tmplLinks[rtPrnDot] = exprFn = tmplFn(rtPrnDot, tmpl, true); // Compile the expression (or use cached copy already in tmpl.links)
}
if (exprFn !== true && newOb) {
// If not reentrant call during compilation
newOb._jsv = exprFn;
newOb.prm = bndCtx.bd;
newOb.bnd = newOb.bnd || newOb.path && newOb.path.indexOf("^") >= 0;
}
}
}
}
return (aposed
// within single-quoted string
? (aposed = !apos, (aposed ? all : lftPrn2 + '"'))
: quoted
// within double-quoted string
? (quoted = !quot, (quoted ? all : lftPrn2 + '"'))
:
(
(lftPrn
? (pathStart[parenDepth] = index++, bndCtx = bndStack[++parenDepth] = {bd: []}, lftPrn)
: "")
+ (space
? (parenDepth
? ""
// New arg or prop - so insert backspace \b (\x08) as separator for named params, used subsequently by rBuildHash, and prepare new bindings array
: (paramIndex = full.slice(paramIndex, index), named
? (named = boundName = bindto = false, "\b")
: "\b,") + paramIndex + (paramIndex = index + all.length, bindings && pathBindings.push(bndCtx.bd = []), "\b")
)
: eq
// named param. Remove bindings for arg and create instead bindings array for prop
? (parenDepth && syntaxError(params), bindings && pathBindings.pop(), named = path, boundName = bound, paramIndex = index + all.length, bound && (bindings = bndCtx.bd = pathBindings[named] = []), path + ':')
: path
// path
? (path.split("^").join(".").replace(rPath, parsePath)
+ (prn
// some.fncall(
? (bndCtx = bndStack[++parenDepth] = {bd: []}, fnCall[parenDepth] = true, prn)
: operator)
)
: operator
// operator
? operator
: rtPrn
// function
? ((fnCall[parenDepth] = false, bndCtx = bndStack[--parenDepth], rtPrn)
+ (prn // rtPrn and prn, e.g )( in (a)() or a()(), or )[ in a()[]
? (bndCtx = bndStack[++parenDepth], fnCall[parenDepth] = true, prn)
: "")
)
: comma
? (fnCall[parenDepth] || syntaxError(params), ",") // We don't allow top-level literal arrays or objects
: lftPrn0
? ""
: (aposed = apos, quoted = quot, '"')
))
);
}
} var named, bindto, boundName,
quoted, // boolean for string content in double quotes
aposed, // or in single quotes
bindings = pathBindings && pathBindings[0], // bindings array for the first arg
bndCtx = {bd: bindings},
bndStack = {0: bndCtx},
paramIndex = 0, // list,
tmplLinks = tmpl ? tmpl.links : bindings && (bindings.links = bindings.links || {}),
// The following are used for tracking path parsing including nested paths, such as "a.b(c^d + (e))^f", and chained computed paths such as
// "a.b().c^d().e.f().g" - which has four chained paths, "a.b()", "^c.d()", ".e.f()" and ".g"
parenDepth = 0,
fnCall = {}, // We are in a function call
pathStart = {}; // tracks the start of the current path such as c^d() in the above example return (params + (tmpl ? " " : ""))
.replace(rParams, parseTokens);
} function buildCode(ast, tmpl, isLinkExpr) {
// Build the template function code from the AST nodes, and set as property on the passed-in template object
// Used for compiling templates, and also by JsViews to build functions for data link expressions
var i, node, tagName, converter, tagCtx, hasTag, hasEncoder, getsVal, hasCnvt, useCnvt, tmplBindings, pathBindings, params, boundOnErrStart, boundOnErrEnd,
tagRender, nestedTmpls, tmplName, nestedTmpl, tagAndElses, content, markup, nextIsElse, oldCode, isElse, isGetVal, tagCtxFn, onError, tagStart, trigger,
tmplBindingKey = 0,
useViews = tmpl.useViews || tmpl.tags || tmpl.templates || tmpl.helpers || tmpl.converters,
code = "",
tmplOptions = {},
l = ast.length; if ("" + tmpl === tmpl) {
tmplName = isLinkExpr ? 'data-link="' + tmpl.replace(rNewLine, " ").slice(1, -1) + '"' : tmpl;
tmpl = 0;
} else {
tmplName = tmpl.tmplName || "unnamed";
if (tmpl.allowCode) {
tmplOptions.allowCode = true;
}
if (tmpl.debug) {
tmplOptions.debug = true;
}
tmplBindings = tmpl.bnds;
nestedTmpls = tmpl.tmpls;
}
for (i = 0; i < l; i++) {
// AST nodes: [0: tagName, 1: converter, 2: content, 3: params, 4: code, 5: onError, 6: trigger, 7:pathBindings, 8: contentMarkup]
node = ast[i]; // Add newline for each callout to t() c() etc. and each markup string
if ("" + node === node) {
// a markup string to be inserted
code += '\n+"' + node + '"';
} else {
// a compiled tag expression to be inserted
tagName = node[0];
if (tagName === "*") {
// Code tag: {{* }}
code += ";\n" + node[1] + "\nret=ret";
} else {
converter = node[1];
content = !isLinkExpr && node[2];
tagCtx = paramStructure(node[3], 'params') + '},' + paramStructure(params = node[4]);
onError = node[5];
trigger = node[6];
markup = node[8] && node[8].replace(rUnescapeQuotes, "$1");
if (isElse = tagName === "else") {
if (pathBindings) {
pathBindings.push(node[7]);
}
} else {
tmplBindingKey = 0;
if (tmplBindings && (pathBindings = node[7])) { // Array of paths, or false if not data-bound
pathBindings = [pathBindings];
tmplBindingKey = tmplBindings.push(1); // Add placeholder in tmplBindings for compiled function
}
}
useViews = useViews || params[1] || params[2] || pathBindings || /view.(?!index)/.test(params[0]);
// useViews is for perf optimization. For render() we only use views if necessary - for the more advanced scenarios.
// We use views if there are props, contextual properties or args with #... (other than #index) - but you can force
// using the full view infrastructure, (and pay a perf price) by opting in: Set useViews: true on the template, manually...
if (isGetVal = tagName === ":") {
if (converter) {
tagName = converter === HTML ? ">" : converter + tagName;
}
} else {
if (content) { // TODO optimize - if content.length === 0 or if there is a tmpl="..." specified - set content to null / don't run this compilation code - since content won't get used!!
// Create template object for nested template
nestedTmpl = tmplObject(markup, tmplOptions);
nestedTmpl.tmplName = tmplName + "/" + tagName;
// Compile to AST and then to compiled function
nestedTmpl.useViews = nestedTmpl.useViews || useViews;
buildCode(content, nestedTmpl);
useViews = nestedTmpl.useViews;
nestedTmpls.push(nestedTmpl);
} if (!isElse) {
// This is not an else tag.
tagAndElses = tagName;
useViews = useViews || tagName && (!$tags[tagName] || !$tags[tagName].flow);
// Switch to a new code string for this bound tag (and its elses, if it has any) - for returning the tagCtxs array
oldCode = code;
code = "";
}
nextIsElse = ast[i + 1];
nextIsElse = nextIsElse && nextIsElse[0] === "else";
}
tagStart = onError ? ";\ntry{\nret+=" : "\n+";
boundOnErrStart = "";
boundOnErrEnd = ""; if (isGetVal && (pathBindings || trigger || converter && converter !== HTML)) {
// For convertVal we need a compiled function to return the new tagCtx(s)
tagCtxFn = "return {" + tagCtx + "};";
tagRender = 'c("' + converter + '",view,';
tagCtxFn = new Function("data,view,j,u", " // " + tmplName + " " + tmplBindingKey + " " + tagName
+ "\n" + tagCtxFn);
tagCtxFn._er = onError; boundOnErrStart = tagRender + tmplBindingKey + ",";
boundOnErrEnd = ")"; tagCtxFn._tag = tagName;
if (isLinkExpr) {
return tagCtxFn;
}
setPaths(tagCtxFn, pathBindings);
useCnvt = true;
}
code += (isGetVal
? (isLinkExpr ? (onError ? "\ntry{\n" : "") + "return " : tagStart) + (useCnvt // Call _cnvt if there is a converter: {{cnvt: ... }} or {^{cnvt: ... }}
? (useCnvt = undefined, useViews = hasCnvt = true, tagRender + (pathBindings
? ((tmplBindings[tmplBindingKey - 1] = tagCtxFn), tmplBindingKey) // Store the compiled tagCtxFn in tmpl.bnds, and pass the key to convertVal()
: "{" + tagCtx + "}") + ")")
: tagName === ">"
? (hasEncoder = true, "h(" + params[0] + ')')
: (getsVal = true, "((v=" + (params[0] || 'data') + ')!=null?v:"")') // Strict equality just for data-link="title{:expr}" so expr=null will remove title attribute
)
: (hasTag = true, "\n{view:view,tmpl:" // Add this tagCtx to the compiled code for the tagCtxs to be passed to renderTag()
+ (content ? nestedTmpls.length : "0") + "," // For block tags, pass in the key (nestedTmpls.length) to the nested content template
+ tagCtx + "},")); if (tagAndElses && !nextIsElse) {
// This is a data-link expression or an inline tag without any elses, or the last {{else}} of an inline tag
// We complete the code for returning the tagCtxs array
code = "[" + code.slice(0, -1) + "]";
tagRender = 't("' + tagAndElses + '",view,this,';
if (isLinkExpr || pathBindings) {
// This is a bound tag (data-link expression or inline bound tag {^{tag ...}}) so we store a compiled tagCtxs function in tmp.bnds
code = new Function("data,view,j,u", " // " + tmplName + " " + tmplBindingKey + " " + tagAndElses + "\nreturn " + code + ";");
code._er = onError;
code._tag = tagAndElses;
if (pathBindings) {
setPaths(tmplBindings[tmplBindingKey - 1] = code, pathBindings);
}
if (isLinkExpr) {
return code; // For a data-link expression we return the compiled tagCtxs function
}
boundOnErrStart = tagRender + tmplBindingKey + ",undefined,";
boundOnErrEnd = ")";
} // This is the last {{else}} for an inline tag.
// For a bound tag, pass the tagCtxs fn lookup key to renderTag.
// For an unbound tag, include the code directly for evaluating tagCtxs array
code = oldCode + tagStart + tagRender + (tmplBindingKey || code) + ")";
pathBindings = 0;
tagAndElses = 0;
}
if (onError) {
useViews = true;
code += ';\n}catch(e){ret' + (isLinkExpr ? "urn " : "+=") + boundOnErrStart + 'j._err(e,view,' + onError + ')' + boundOnErrEnd + ';}\n' + (isLinkExpr ? "" : 'ret=ret');
}
}
}
}
// Include only the var references that are needed in the code
code = "// " + tmplName + "\nvar v"
+ (hasTag ? ",t=j._tag" : "") // has tag
+ (hasCnvt ? ",c=j._cnvt" : "") // converter
+ (hasEncoder ? ",h=j.converters.html" : "") // html converter
+ (isLinkExpr ? ";\n" : ',ret=""\n')
+ (tmplOptions.debug ? "debugger;" : "")
+ code
+ (isLinkExpr ? "\n" : ";\nreturn ret;"); if ($viewsSettings._dbgMode) {
code = "try {\n" + code + "\n}catch(e){\nreturn j._err(e, view);\n}";
} try {
code = new Function("data,view,j,u", code);
} catch (e) {
syntaxError("Compiled template code:\n\n" + code + '\n: "' + e.message + '"');
}
if (tmpl) {
tmpl.fn = code;
tmpl.useViews = !!useViews;
}
return code;
} //==========
// Utilities
//========== // Merge objects, in particular contexts which inherit from parent contexts
function extendCtx(context, parentContext) {
// Return copy of parentContext, unless context is defined and is different, in which case return a new merged context
// If neither context nor parentContext are defined, return undefined
return context && context !== parentContext
? (parentContext
? $extend($extend({}, parentContext), context)
: context)
: parentContext && $extend({}, parentContext);
} // Get character entity for HTML and Attribute encoding
function getCharEntity(ch) {
return charEntities[ch] || (charEntities[ch] = "&#" + ch.charCodeAt(0) + ";");
} //========================== Initialize ========================== for (jsvStoreName in jsvStores) {
registerStore(jsvStoreName, jsvStores[jsvStoreName]);
} var $isFunction, $isArray,
$templates = $views.templates,
$converters = $views.converters,
$helpers = $views.helpers,
$tags = $views.tags,
$sub = $views.sub,
$viewsSettings = $views.settings; $sub._tg.prototype = {
baseApply: baseApply,
cvtArgs: convertArgs
}; topView = $sub.topView = new View(); if ($) {
////////////////////////////////////////////////////////////////////////////////////////////////
// jQuery (= $) is loaded
$.fn.render = function(data, context, noIteration) {
var tmplElem = this.jquery && (this[0] || error('Unknown template: "' + this.selector + '"')),
tmpl = tmplElem.getAttribute(tmplAttr); return renderContent.call(tmpl ? $templates[tmpl] : $templates(tmplElem), data, context, noIteration);
}; if ($.observable) {
$extend($sub, $.views.sub); // jquery.observable.js was loaded before jsrender.js
$views.map = $.views.map;
}
} else {
////////////////////////////////////////////////////////////////////////////////////////////////
// jQuery is not loaded. $ = {}; if (!isCommonJS) {
// We are loading jsrender.js from a script element, not AMD or CommonJS, so set global
global.jsviews = $;
} $.isFunction = function(ob) {
return typeof ob === "function";
}; $.isArray = Array.isArray || function(obj) {
return $.toString.call(obj) === "[object Array]";
}; $.noConflict = function() {
if (global.jsviews === $) {
global.jsviews = jsViewsPrev;
}
return $;
};
} $isFunction = $.isFunction;
$isArray = $.isArray;
$.render = $render;
$.views = $views;
$.templates = $templates = $views.templates; $views.compile = function(markup, options) {
options = options || {};
options.markup = markup;
return $templates(options);
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debugMode: dbgMode,
delimiters: $viewsDelimiters,
onError: function(e, view, fallback) {
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flow: true
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attr: htmlEncode, // Includes > encoding since rConvertMarkers in JsViews does not skip > characters in attribute strings
url: function(text) {
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