can
Version:
MIT-licensed, client-side, JavaScript framework that makes building rich web applications easy.
161 lines (160 loc) • 5.32 kB
JavaScript
/*!
* CanJS - 2.3.34
* http://canjs.com/
* Copyright (c) 2018 Bitovi
* Mon, 30 Apr 2018 20:56:51 GMT
* Licensed MIT
*/
/*can@2.3.34#view/ejs/ejs*/
define([
'can/util/library',
'can/view',
'can/util/string',
'can/compute',
'can/scanner',
'can/render'
], function (can) {
var extend = can.extend, EJS = function (options) {
if (this.constructor !== EJS) {
var ejs = new EJS(options);
return function (data, helpers) {
return ejs.render(data, helpers);
};
}
if (typeof options === 'function') {
this.template = { fn: options };
return;
}
extend(this, options);
this.template = this.scanner.scan(this.text, this.name);
};
can.EJS = EJS;
EJS.prototype.render = function (object, extraHelpers) {
object = object || {};
return this.template.fn.call(object, object, new EJS.Helpers(object, extraHelpers || {}));
};
extend(EJS.prototype, {
scanner: new can.view.Scanner({
text: {
outStart: 'with(_VIEW) { with (_CONTEXT) {',
outEnd: '}}',
argNames: '_CONTEXT,_VIEW',
context: 'this'
},
tokens: [
[
'templateLeft',
'<%%'
],
[
'templateRight',
'%>'
],
[
'returnLeft',
'<%=='
],
[
'escapeLeft',
'<%='
],
[
'commentLeft',
'<%#'
],
[
'left',
'<%'
],
[
'right',
'%>'
],
[
'returnRight',
'%>'
]
],
helpers: [{
name: /\s*\(([\$\w]+)\)\s*->([^\n]*)/,
fn: function (content) {
var quickFunc = /\s*\(([\$\w]+)\)\s*->([^\n]*)/, parts = content.match(quickFunc);
return 'can.proxy(function(__){var ' + parts[1] + '=can.$(__);' + parts[2] + '}, this);';
}
}],
transform: function (source) {
return source.replace(/<%([\s\S]+?)%>/gm, function (whole, part) {
var brackets = [], foundBracketPair, i;
part.replace(/[{}]/gm, function (bracket, offset) {
brackets.push([
bracket,
offset
]);
});
do {
foundBracketPair = false;
for (i = brackets.length - 2; i >= 0; i--) {
if (brackets[i][0] === '{' && brackets[i + 1][0] === '}') {
brackets.splice(i, 2);
foundBracketPair = true;
break;
}
}
} while (foundBracketPair);
if (brackets.length >= 2) {
var result = ['<%'], bracket, last = 0;
for (i = 0; bracket = brackets[i]; i++) {
result.push(part.substring(last, last = bracket[1]));
if (bracket[0] === '{' && i < brackets.length - 1 || bracket[0] === '}' && i > 0) {
result.push(bracket[0] === '{' ? '{ %><% ' : ' %><% }');
} else {
result.push(bracket[0]);
}
++last;
}
result.push(part.substring(last), '%>');
return result.join('');
} else {
return '<%' + part + '%>';
}
});
}
})
});
EJS.Helpers = function (data, extras) {
this._data = data;
this._extras = extras;
extend(this, extras);
};
EJS.Helpers.prototype = {
list: function (list, cb) {
can.each(list, function (item, i) {
cb(item, i, list);
});
},
each: function (list, cb) {
if (can.isArray(list)) {
this.list(list, cb);
} else {
can.view.lists(list, cb);
}
}
};
can.view.register({
suffix: 'ejs',
script: function (id, src) {
return 'can.EJS(function(_CONTEXT,_VIEW) { ' + new EJS({
text: src,
name: id
}).template.out + ' })';
},
renderer: function (id, text) {
return EJS({
text: text,
name: id
});
}
});
can.ejs.Helpers = EJS.Helpers;
return can;
});