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jsrender.js
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jsrender.js
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/*! JsRender v1.0.6: http://jsviews.com/#jsrender */
/*! **VERSION FOR WEB** (For NODE.JS see http://jsviews.com/download/jsrender-node.js) */
/*
* Best-of-breed templating in browser or on Node.js.
* Does not require jQuery, or HTML DOM
* Integrates with JsViews (http://jsviews.com/#jsviews)
*
* Copyright 2020, Boris Moore
* Released under the MIT License.
*/
//jshint -W018, -W041, -W120
(function(factory, global) {
// global var is the this object, which is window when running in the usual browser environment
var $ = global.jQuery;
if (typeof exports === "object") { // CommonJS e.g. Browserify
module.exports = $
? factory(global, $)
: function($) { // If no global jQuery, take optional jQuery passed as parameter: require('jsrender')(jQuery)
if ($ && !$.fn) {
throw "Provide jQuery or null";
}
return factory(global, $);
};
} else if (typeof define === "function" && define.amd) { // AMD script loader, e.g. RequireJS
define(function() {
return factory(global);
});
} else { // Browser using plain <script> tag
factory(global, false);
}
} (
// factory (for jsrender.js)
function(global, $) {
"use strict";
//========================== Top-level vars ==========================
// global var is the this object, which is window when running in the usual browser environment
var setGlobals = $ === false; // Only set globals if script block in browser (not AMD and not CommonJS)
$ = $ && $.fn ? $ : global.jQuery; // $ is jQuery passed in by CommonJS loader (Browserify), or global jQuery.
var versionNumber = "v1.0.6",
jsvStoreName, rTag, rTmplString, topView, $views, $expando,
_ocp = "_ocp", // Observable contextual parameter
//TODO tmplFnsCache = {},
$isFunction, $isArray, $templates, $converters, $helpers, $tags, $sub, $subSettings, $subSettingsAdvanced, $viewsSettings,
delimOpenChar0, delimOpenChar1, delimCloseChar0, delimCloseChar1, linkChar, setting, baseOnError,
isRenderCall,
rNewLine = /[ \t]*(\r\n|\n|\r)/g,
rUnescapeQuotes = /\\(['"])/g,
rEscapeQuotes = /['"\\]/g, // Escape quotes and \ character
rBuildHash = /(?:\x08|^)(onerror:)?(?:(~?)(([\w$.]+):)?([^\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)?$/,
rWrappedInViewMarker = /^\#\d+_`[\s\S]*\/\d+_`$/,
rHtmlEncode = rAttrEncode,
rDataEncode = /[&<>]/g,
rDataUnencode = /&(amp|gt|lt);/g,
rBracketQuote = /\[['"]?|['"]?\]/g,
viewId = 0,
charEntities = {
"&": "&",
"<": "<",
">": ">",
"\x00": "�",
"'": "'",
'"': """,
"`": "`",
"=": "="
},
charsFromEntities = {
amp: "&",
gt: ">",
lt: "<"
},
HTML = "html",
OBJECT = "object",
tmplAttr = "data-jsv-tmpl",
jsvTmpl = "jsvTmpl",
indexStr = "For #index in nested block use #getIndex().",
$render = {},
jsr = global.jsrender,
jsrToJq = jsr && $ && !$.render, // JsRender already loaded, without jQuery. but we will re-load it now to attach to jQuery
jsvStores = {
template: {
compile: compileTmpl
},
tag: {
compile: compileTag
},
viewModel: {
compile: compileViewModel
},
helper: {},
converter: {}
};
// views object ($.views if jQuery is loaded, jsrender.views if no jQuery, e.g. in Node.js)
$views = {
jsviews: versionNumber,
sub: {
// subscription, e.g. JsViews integration
rPath: /^(!*?)(?:null|true|false|\d[\d.]*|([\w$]+|\.|~([\w$]+)|#(view|([\w$]+))?)([\w$.^]*?)(?:[.[^]([\w$]+)\]?)?)$/g,
// not object helper view viewProperty pathTokens leafToken
rPrm: /(\()(?=\s*\()|(?:([([])\s*)?(?:(\^?)(~?[\w$.^]+)?\s*((\+\+|--)|\+|-|~(?![\w$])|&&|\|\||===|!==|==|!=|<=|>=|[<>%*:?\/]|(=))\s*|(!*?(@)?[#~]?[\w$.^]+)([([])?)|(,\s*)|(\(?)\\?(?:(')|("))|(?:\s*(([)\]])(?=[.^]|\s*$|[^([])|[)\]])([([]?))|(\s+)/g,
// lftPrn0 lftPrn bound path operator err eq path2 late prn comma lftPrn2 apos quot rtPrn rtPrnDot prn2 space
View: View,
Err: JsViewsError,
tmplFn: tmplFn,
parse: parseParams,
extend: $extend,
extendCtx: extendCtx,
syntaxErr: syntaxError,
onStore: {
template: function(name, item) {
if (item === null) {
delete $render[name];
} else if (name) {
$render[name] = item;
}
}
},
addSetting: addSetting,
settings: {
allowCode: false
},
advSet: noop, // Update advanced settings
_thp: tagHandlersFromProps,
_gm: getMethod,
_tg: function() {}, // Constructor for tagDef
_cnvt: convertVal,
_tag: renderTag,
_er: error,
_err: onRenderError,
_cp: retVal, // Get observable contextual parameters (or properties) ~foo=expr. In JsRender, simply returns val.
_sq: function(token) {
if (token === "constructor") {
syntaxError("");
}
return token;
}
},
settings: {
delimiters: $viewsDelimiters,
advanced: function(value) {
return value
? (
$extend($subSettingsAdvanced, value),
$sub.advSet(),
$viewsSettings
)
: $subSettingsAdvanced;
}
},
map: dataMap // If jsObservable loaded first, use that definition of dataMap
};
function getDerivedMethod(baseMethod, method) {
return function() {
var ret,
tag = this,
prevBase = tag.base;
tag.base = baseMethod; // Within method call, calling this.base will call the base method
ret = method.apply(tag, arguments); // Call the method
tag.base = prevBase; // Replace this.base to be the base method of the previous call, for chained calls
return ret;
};
}
function getMethod(baseMethod, method) {
// For derived methods (or handlers declared declaratively as in {{:foo onChange=~fooChanged}} replace by a derived method, to allow using this.base(...)
// or this.baseApply(arguments) to call the base implementation. (Equivalent to this._super(...) and this._superApply(arguments) in jQuery UI)
if ($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 use it
: getDerivedMethod(noop, baseMethod), // baseMethod is not derived so make its base method be the noop method
method
);
method._d = (baseMethod && baseMethod._d || 0) + 1; // Add flag for derived method (incremented for derived of derived...)
}
return method;
}
function tagHandlersFromProps(tag, tagCtx) {
var prop,
props = tagCtx.props;
for (prop in props) {
if (rHasHandlers.test(prop) && !(tag[prop] && tag[prop].fix)) { // Don't override handlers with fix expando (used in datepicker and spinner)
tag[prop] = prop !== "convert" ? getMethod(tag.constructor.prototype[prop], props[prop]) : 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(...)}}, {{dbg .../}}, {^{for ... onAfterLink=~dbg}} etc.
try {
console.log("JsRender dbg breakpoint: " + val);
throw "dbg breakpoint"; // To break here, stop on caught exceptions.
}
catch (e) {}
return this.base ? this.baseApply(arguments) : val;
}
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) {
if (target) {
for (var name in source) {
target[name] = source[name];
}
return target;
}
}
(JsViewsError.prototype = new Error()).constructor = JsViewsError;
//========================== Top-level functions ==========================
//===================
// views.delimiters
//===================
/**
* Set the tag opening and closing delimiters and 'link' character. Default is "{{", "}}" and "^"
* openChars, closeChars: opening and closing strings, each with two characters
* $.views.settings.delimiters(...)
*
* @param {string} openChars
* @param {string} [closeChars]
* @param {string} [link]
* @returns {Settings}
*
* Get delimiters
* delimsArray = $.views.settings.delimiters()
*
* @returns {string[]}
*/
function $viewsDelimiters(openChars, closeChars, link) {
if (!openChars) {
return $subSettings.delimiters;
}
if ($isArray(openChars)) {
return $viewsDelimiters.apply($views, openChars);
}
linkChar = link ? link[0] : linkChar;
if (!/^(\W|_){5}$/.test(openChars + closeChars + linkChar)) {
error("Invalid delimiters"); // Must be non-word characters, and openChars and closeChars must each be length 2
}
delimOpenChar0 = openChars[0];
delimOpenChar1 = openChars[1];
delimCloseChar0 = closeChars[0];
delimCloseChar1 = closeChars[1];
$subSettings.delimiters = [delimOpenChar0 + delimOpenChar1, delimCloseChar0 + delimCloseChar1, linkChar];
// Escape the characters - since they could be regex special characters
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] followed by space+params then convertBack?
rTag = "(?:(\\w+(?=[\\/\\s\\" + delimCloseChar0 + "]))|(\\w+)?(:)|(>)|(\\*))\\s*((?:[^\\"
+ delimCloseChar0 + "]|\\" + delimCloseChar0 + "(?!\\" + delimCloseChar1 + "))*?)";
// Make rTag available to JsViews (or other components) for parsing binding expressions
$sub.rTag = "(?:" + rTag + ")";
// { ^? { tag+params slash? or closingTag or comment
rTag = new RegExp("(?:" + openChars + rTag + "(\\/)?|\\" + delimOpenChar0 + "(\\" + linkChar + ")?\\" + delimOpenChar1 + "(?:(?:\\/(\\w+))\\s*|!--[\\s\\S]*?--))" + closeChars, "g");
// Default: bind tagName cvt cln html code params slash bind2 closeBlk comment
// /(?:{(\^)?{(?:(\w+(?=[\/\s}]))|(\w+)?(:)|(>)|(\*))\s*((?:[^}]|}(?!}))*?)(\/)?|{(\^)?{(?:(?:\/(\w+))\s*|!--[\s\S]*?--))}}
$sub.rTmpl = new RegExp("^\\s|\\s$|<.*>|([^\\\\]|^)[{}]|" + openChars + ".*" + closeChars);
// $sub.rTmpl looks for initial or final white space, html tags or { or } char not preceded by \\, or JsRender tags {{xxx}}.
// Each of these strings are considered NOT to be jQuery selectors
return $viewsSettings;
}
//=========
// View.get
//=========
function getView(inner, type) { //view.get(inner, type)
if (!type && inner !== true) {
// view.get(type)
type = inner;
inner = undefined;
}
var views, i, l, found,
view = this,
root = type === "root";
// view.get("root") returns view.root, view.get() returns view.parent, view.get(true) returns view.views[0].
if (inner) {
// Go through views - this one, and all nested ones, depth-first - and return first one with given type.
// If type is undefined, i.e. view.get(true), return first child view.
found = type && view.type === type && view;
if (!found) {
views = view.views;
if (view._.useKey) {
for (i in views) {
if (found = type ? views[i].get(inner, type) : views[i]) {
break;
}
}
} else {
for (i = 0, l = views.length; !found && i < l; i++) {
found = type ? views[i].get(inner, type) : views[i];
}
}
}
} else if (root) {
// Find root view. (view whose parent is top view)
found = view.root;
} else if (type) {
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;
}
} else {
found = view.parent;
}
return found || undefined;
}
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.ctxPrm, etc.
//==================
/* Internal private: view._getOb() */
function getPathObject(ob, path, ltOb, fn) {
// Iterate through path to late paths: @a.b.c paths
// Return "" (or noop if leaf is a function @a.b.c(...) ) if intermediate object not yet available
var prevOb, tokens, l,
i = 0;
if (ltOb === 1) {
fn = 1;
ltOb = undefined;
}
// Paths like ^a^b^c or ~^a^b^c will not throw if an object in path is undefined.
if (path) {
tokens = path.split(".");
l = tokens.length;
for (; ob && i < l; i++) {
prevOb = ob;
ob = tokens[i] ? ob[tokens[i]] : ob;
}
}
if (ltOb) {
ltOb.lt = ltOb.lt || i<l; // If i < l there was an object in the path not yet available
}
return ob === undefined
? fn ? noop : ""
: fn ? function() {
return ob.apply(prevOb, arguments);
} : ob;
}
function contextParameter(key, value, get) {
// Helper method called as view.ctxPrm(key) for helpers or template parameters ~foo - from compiled template or from context callback
var wrapped, deps, res, obsCtxPrm, tagElse, callView, newRes,
storeView = this,
isUpdate = !isRenderCall && arguments.length > 1,
store = storeView.ctx;
if (key) {
if (!storeView._) { // tagCtx.ctxPrm() call
tagElse = storeView.index;
storeView = storeView.tag;
}
callView = storeView;
if (store && store.hasOwnProperty(key) || (store = $helpers).hasOwnProperty(key)) {
res = store[key];
if (key === "tag" || key === "tagCtx" || key === "root" || key === "parentTags") {
return res;
}
} else {
store = undefined;
}
if (!isRenderCall && storeView.tagCtx || storeView.linked) { // Data-linked view, or tag instance
if (!res || !res._cxp) {
// Not a contextual parameter
// Set storeView to tag (if this is a tag.ctxPrm() call) or to root view ("data" view of linked template)
storeView = storeView.tagCtx || $isFunction(res)
? storeView // Is a tag, not a view, or is a computed contextual parameter, so scope to the callView, no the 'scope view'
: (storeView = storeView.scope || storeView,
!storeView.isTop && storeView.ctx.tag // If this view is in a tag, set storeView to the tag
|| storeView);
if (res !== undefined && storeView.tagCtx) {
// If storeView is a tag, but the contextual parameter has been set at at higher level (e.g. helpers)...
storeView = storeView.tagCtx.view.scope; // then move storeView to the outer level (scope of tag container view)
}
store = storeView._ocps;
res = store && store.hasOwnProperty(key) && store[key] || res;
if (!(res && res._cxp) && (get || isUpdate)) {
// Create observable contextual parameter
(store || (storeView._ocps = storeView._ocps || {}))[key]
= res
= [{
_ocp: res, // The observable contextual parameter value
_vw: callView,
_key: key
}];
res._cxp = {
path: _ocp,
ind: 0,
updateValue: function(val, path) {
$.observable(res[0]).setProperty(_ocp, val); // Set the value (res[0]._ocp)
return this;
}
};
}
}
if (obsCtxPrm = res && res._cxp) {
// If this helper resource is an observable contextual parameter
if (arguments.length > 2) {
deps = res[1] ? $sub._ceo(res[1].deps) : [_ocp]; // fn deps (with any exprObs cloned using $sub._ceo)
deps.unshift(res[0]); // view
deps._cxp = obsCtxPrm;
// In a context callback for a contextual param, we set get = true, to get ctxPrm [view, dependencies...] array - needed for observe call
return deps;
}
tagElse = obsCtxPrm.tagElse;
newRes = res[1] // linkFn for compiled expression
? obsCtxPrm.tag && obsCtxPrm.tag.cvtArgs
? obsCtxPrm.tag.cvtArgs(tagElse, 1)[obsCtxPrm.ind] // = tag.bndArgs() - for tag contextual parameter
: res[1](res[0].data, res[0], $sub) // = fn(data, view, $sub) for compiled binding expression
: res[0]._ocp; // Observable contextual parameter (uninitialized, or initialized as static expression, so no path dependencies)
if (isUpdate) {
$sub._ucp(key, value, storeView, obsCtxPrm); // Update observable contextual parameter
return storeView;
}
res = newRes;
}
}
if (res && $isFunction(res)) {
// If a helper is of type function 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) ? callView : this, arguments);
};
$extend(wrapped, res); // Attach same expandos (if any) to the wrapped function
}
return wrapped || res;
}
}
/* Internal private: view._getTmpl() */
function getTemplate(tmpl) {
return tmpl && (tmpl.fn
? tmpl
: this.getRsc("templates", tmpl) || $templates(tmpl)); // not yet compiled
}
//==============
// views._cnvt
//==============
function convertVal(converter, view, tagCtx, onError) {
// Called from compiled template code for {{:}}
// self is template object or linkCtx object
var tag, linkCtx, value, argsLen, bindTo,
// 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];
if (onError === undefined && boundTag && boundTag._lr) { // lateRender
onError = "";
}
if (onError !== undefined) {
tagCtx = onError = {props: {}, args: [onError]};
} else if (boundTag) {
tagCtx = boundTag(view.data, view, $sub);
}
boundTag = boundTag._bd && boundTag;
if (converter || boundTag) {
linkCtx = view._lc; // For data-link="{cvt:...}"... See onDataLinkedTagChange
tag = linkCtx && linkCtx.tag;
tagCtx.view = view;
if (!tag) {
tag = $extend(new $sub._tg(), {
_: {
bnd: boundTag,
unlinked: true,
lt: tagCtx.lt // If a late path @some.path has not returned @some object, mark tag as late
},
inline: !linkCtx,
tagName: ":",
convert: converter,
onArrayChange: true,
flow: true,
tagCtx: tagCtx,
tagCtxs: [tagCtx],
_is: "tag"
});
argsLen = tagCtx.args.length;
if (argsLen>1) {
bindTo = tag.bindTo = [];
while (argsLen--) {
bindTo.unshift(argsLen); // Bind to all the arguments - generate bindTo array: [0,1,2...]
}
}
if (linkCtx) {
linkCtx.tag = tag;
tag.linkCtx = linkCtx;
}
tagCtx.ctx = extendCtx(tagCtx.ctx, (linkCtx ? linkCtx.view : view).ctx);
tagHandlersFromProps(tag, tagCtx);
}
tag._er = onError && value;
tag.ctx = tagCtx.ctx || tag.ctx || {};
tagCtx.ctx = undefined;
value = tag.cvtArgs()[0]; // If there is a convertBack but no convert, converter will be "true"
tag._er = onError && value;
} else {
value = tagCtx.args[0];
}
// Call onRender (used by JsViews if present, to add binding annotations around rendered content)
value = boundTag && view._.onRender
? view._.onRender(value, view, tag)
: value;
return value != undefined ? value : "";
}
function convertArgs(tagElse, bound) { // tag.cvtArgs() or tag.cvtArgs(tagElse?, true?)
var l, key, boundArgs, args, bindFrom, tag, converter,
tagCtx = this;
if (tagCtx.tagName) {
tag = tagCtx;
tagCtx = (tag.tagCtxs || [tagCtx])[tagElse||0];
if (!tagCtx) {
return;
}
} else {
tag = tagCtx.tag;
}
bindFrom = tag.bindFrom;
args = tagCtx.args;
if ((converter = tag.convert) && "" + converter === converter) {
converter = converter === "true"
? undefined
: (tagCtx.view.getRsc("converters", converter) || error("Unknown converter: '" + converter + "'"));
}
if (converter && !bound) { // If there is a converter, use a copy of the tagCtx.args array for rendering, and replace the args[0] in
args = args.slice(); // the copied array with the converted value. But we do not modify the value of tag.tagCtx.args[0] (the original args array)
}
if (bindFrom) { // Get the values of the boundArgs
boundArgs = [];
l = bindFrom.length;
while (l--) {
key = bindFrom[l];
boundArgs.unshift(argOrProp(tagCtx, key));
}
if (bound) {
args = boundArgs; // Call to bndArgs() - returns the boundArgs
}
}
if (converter) {
converter = converter.apply(tag, boundArgs || args);
if (converter === undefined) {
return args; // Returning undefined from a converter is equivalent to not having a converter.
}
bindFrom = bindFrom || [0];
l = bindFrom.length;
if (!$isArray(converter) || converter.length !== l) {
converter = [converter];
bindFrom = [0];
l = 1;
}
if (bound) { // Call to bndArgs() - so apply converter to all boundArgs
args = converter; // The array of values returned from the converter
} else { // Call to cvtArgs()
while (l--) {
key = bindFrom[l];
if (+key === key) {
args[key] = converter[l];
}
}
}
}
return args;
}
function argOrProp(context, key) {
context = context[+key === key ? "args" : "props"];
return context && context[key];
}
function convertBoundArgs(tagElse) { // tag.bndArgs()
return this.cvtArgs(tagElse, 1);
}
//=============
// views.tag
//=============
/* view.getRsc() */
function getResource(resourceType, itemName) {
var res, store,
view = this;
if ("" + itemName === itemName) {
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) {
function bindToOrBindFrom(type) {
var bindArray = tag[type];
if (bindArray !== undefined) {
bindArray = $isArray(bindArray) ? bindArray : [bindArray];
m = bindArray.length;
while (m--) {
key = bindArray[m];
if (!isNaN(parseInt(key))) {
bindArray[m] = parseInt(key); // Convert "0" to 0, etc.
}
}
}
return bindArray || [0];
}
parentView = parentView || topView;
var tag, tagDef, template, tags, attr, parentTag, l, m, n, itemRet, tagCtx, tagCtxCtx, ctxPrm, bindTo, bindFrom, initVal,
content, callInit, mapDef, thisMap, args, bdArgs, props, tagDataMap, contentCtx, key, bindFromLength, bindToLength, linkedElement, defaultCtx,
i = 0,
ret = "",
linkCtx = parentView._lc || false, // For data-link="{myTag...}"... See onDataLinkedTagChange
ctx = parentView.ctx,
parentTmpl = tmpl || parentView.tmpl,
// If tagCtxs 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 && boundTag && (boundTag._lr = (tagDef.lateRender && boundTag._lr!== false || boundTag._lr))) {
onError = ""; // If lateRender, set temporary onError, to skip initial rendering (and render just "")
}
if (onError !== undefined) {
ret += onError;
tagCtxs = onError = [{props: {}, args: [], params: {props:{}}}];
} else if (boundTag) {
tagCtxs = boundTag(parentView.data, parentView, $sub);
}
l = tagCtxs.length;
for (; i < l; i++) {
tagCtx = tagCtxs[i];
content = tagCtx.tmpl;
if (!linkCtx || !linkCtx.tag || i && !linkCtx.tag.inline || tag._er || content && +content===content) {
// Initialize tagCtx
// For block tags, tagCtx.tmpl is an integer > 0
if (content && parentTmpl.tmpls) {
tagCtx.tmpl = tagCtx.content = parentTmpl.tmpls[content - 1]; // Set the tmpl property to the content of the block tag
}
tagCtx.index = i;
tagCtx.ctxPrm = contextParameter;
tagCtx.render = renderContent;
tagCtx.cvtArgs = convertArgs;
tagCtx.bndArgs = convertBoundArgs;
tagCtx.view = parentView;
tagCtx.ctx = extendCtx(extendCtx(tagCtx.ctx, tagDef && tagDef.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)
tagCtx.tmpl = parentView._getTmpl(tmpl);
tagCtx.content = tagCtx.content || tagCtx.tmpl;
}
if (!tag) {
// This will only be hit for initial tagCtx (not for {{else}}) - if the tag instance does not exist yet
// 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._.ths = tagCtx.params.props.this; // Tag has a this=expr binding, to get javascript reference to tag instance
tag._.lt = tagCtxs.lt; // If a late path @some.path has not returned @some object, mark tag as late
tag._.arrVws = {};
} else if (tag.dataBoundOnly) {
error(tagName + " must be data-bound:\n{^{" + tagName + "}}");
}
//TODO better perf for childTags() - keep child tag.tags array, (and remove child, when disposed)
// tag.tags = [];
} else if (linkCtx && linkCtx.fn._lr) {
callInit = !!tag.init;
}
tagDataMap = tag.dataMap;
tagCtx.tag = tag;
if (tagDataMap && tagCtxs) {
tagCtx.map = 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;
tagCtxCtx.tagCtx = tagCtx;
}
}
if (!(tag._er = onError)) {
tagHandlersFromProps(tag, tagCtxs[0]);
tag.rendering = {rndr: tag.rendering}; // Provide object for state during render calls to tag and elses. (Used by {{if}} and {{for}}...)
for (i = 0; i < l; i++) { // Iterate tagCtx for each {{else}} block
tagCtx = tag.tagCtx = tagCtxs[i];
props = tagCtx.props;
tag.ctx = tagCtx.ctx;
if (!i) {
if (callInit) {
tag.init(tagCtx, linkCtx, tag.ctx);
callInit = undefined;
}
if (!tagCtx.args.length && tagCtx.argDefault !== false && tag.argDefault !== false) {
tagCtx.args = args = [tagCtx.view.data]; // Missing first arg defaults to the current data context
tagCtx.params.args = ["#data"];
}
bindTo = bindToOrBindFrom("bindTo");
if (tag.bindTo !== undefined) {
tag.bindTo = bindTo;
}
if (tag.bindFrom !== undefined) {
tag.bindFrom = bindToOrBindFrom("bindFrom");
} else if (tag.bindTo) {
tag.bindFrom = tag.bindTo = bindTo;
}
bindFrom = tag.bindFrom || bindTo;
bindToLength = bindTo.length;
bindFromLength = bindFrom.length;
if (tag._.bnd && (linkedElement = tag.linkedElement)) {
tag.linkedElement = linkedElement = $isArray(linkedElement) ? linkedElement: [linkedElement];
if (bindToLength !== linkedElement.length) {
error("linkedElement not same length as bindTo");
}
}
if (linkedElement = tag.linkedCtxParam) {
tag.linkedCtxParam = linkedElement = $isArray(linkedElement) ? linkedElement: [linkedElement];
if (bindFromLength !== linkedElement.length) {
error("linkedCtxParam not same length as bindFrom/bindTo");
}
}
if (bindFrom) {
tag._.fromIndex = {}; // Hash of bindFrom index which has same path value as bindTo index. fromIndex = tag._.fromIndex[toIndex]
tag._.toIndex = {}; // Hash of bindFrom index which has same path value as bindTo index. fromIndex = tag._.fromIndex[toIndex]
n = bindFromLength;
while (n--) {
key = bindFrom[n];
m = bindToLength;
while (m--) {
if (key === bindTo[m]) {
tag._.fromIndex[m] = n;
tag._.toIndex[n] = m;
}
}
}
}
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 || linkCtx._dfAt;
}
attr = tag.attr;
tag._.noVws = attr && attr !== HTML;
}
args = tag.cvtArgs(i);
if (tag.linkedCtxParam) {
bdArgs = tag.cvtArgs(i, 1);
m = bindFromLength;
defaultCtx = tag.constructor.prototype.ctx;
while (m--) {
if (ctxPrm = tag.linkedCtxParam[m]) {
key = bindFrom[m];
initVal = bdArgs[m];
// Create tag contextual parameter
tagCtx.ctx[ctxPrm] = $sub._cp(
defaultCtx && initVal === undefined ? defaultCtx[ctxPrm]: initVal,
initVal !== undefined && argOrProp(tagCtx.params, key),
tagCtx.view,
tag._.bnd && {tag: tag, cvt: tag.convert, ind: m, tagElse: i}
);
}
}
}
if ((mapDef = props.dataMap || tagDataMap) && (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}}
}
mapDef.map(args[0], tagCtx, thisMap, !tag._.bnd);
thisMap = tagCtx.map;
}
args = [thisMap.tgt];
}
itemRet = undefined;
if (tag.render) {
itemRet = tag.render.apply(tag, args);
if (parentView.linked && itemRet && !rWrappedInViewMarker.test(itemRet)) {
// When a tag renders content from the render method, with data linking then we need to wrap with view markers, if absent,
// to provide a contentView for the tag, which will correctly dispose bindings if deleted. The 'tmpl' for this view will
// be a dumbed-down template which will always return the itemRet string (no matter what the data is). The itemRet string
// is not compiled as template markup, so can include "{{" or "}}" without triggering syntax errors
tmpl = { // 'Dumbed-down' template which always renders 'static' itemRet string
links: []
};
tmpl.render = tmpl.fn = function() {
return itemRet;
};
itemRet = renderWithViews(tmpl, parentView.data, undefined, true, parentView, undefined, undefined, tag);
}
}
if (!args.length) {
args = [parentView]; // no arguments - (e.g. {{else}}) get data context from view.
}
if (itemRet === undefined) {
contentCtx = args[0]; // Default data context for wrapped block content is the first argument
if (tag.contentCtx) { // Set tag.contentCtx to true, to inherit parent context, or to a function to provide alternate context.
contentCtx = tag.contentCtx === true ? parentView : tag.contentCtx(contentCtx);
}
itemRet = tagCtx.render(contentCtx, true) || (isUpdate ? undefined : "");
}
ret = ret
? ret + (itemRet || "")
: itemRet !== undefined
? "" + itemRet
: undefined; // If no return value from render, and no template/content tagCtx.render(...), return undefined
}
tag.rendering = tag.rendering.rndr; // Remove tag.rendering object (if this is outermost render call. (In case of nested calls)
}
tag.tagCtx = tagCtxs[0];
tag.ctx = tag.tagCtx.ctx;
if (tag._.noVws && 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, tag)
: ret;
}
//=================
// View constructor
//=================
function View(context, type, parentView, data, template, key, onRender, contentTmpl) {
// Constructor for view object in view hierarchy. (Augmented by JsViews if JsViews is loaded)
var views, parentView_, tag, self_,
self = this,
isArray = type === "array";
// 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
self.content = contentTmpl;
self.views = isArray ? [] : {};
self.data = data;
self.tmpl = template;
self_ = self._ = {
key: 0,
// ._.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
useKey: isArray ? 0 : 1,
id: "" + viewId++,
onRender: onRender,
bnds: {}
};
self.linked = !!onRender;
self.type = type || "top";
if (!parentView || parentView.type === "top") {
(self.ctx = context || {}).root = self.data;
}
if (self.parent = parentView) {
self.root = parentView.root || self; // view whose parent is top view
views = parentView.views;
parentView_ = parentView._;
self.isTop = parentView_.scp; // Is top content view of a link("#container", ...) call
self.scope = (!context.tag || context.tag === parentView.ctx.tag) && !self.isTop && parentView.scope || self;
// Scope for contextParams - closest non flow tag ancestor or root view
if (parentView_.useKey) {
// Parent is not an 'array 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;
} else if (views.length === (self_.key = self.index = key)) { // Parent is an 'array view'. Add this view to its views array
views.push(self); // Adding to end of views array. (Using push when possible - better perf than splice)
} else {
views.splice(key, 0, self); // Inserting in views array
}
// 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 if (type) {
self.root = self; // view whose parent is top view
}
}
View.prototype = {
get: getView,
getIndex: getIndex,
ctxPrm: contextParameter,