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Add varname to _.templateSettings.

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* Leave out the with statement when using varname.
* Rename source to compiled.
* Comments, comments, comments.
This commit is contained in:
Brad Dunbar
2012-04-03 10:57:39 -07:00
parent 8cfb076c9b
commit b04b813f02
3 changed files with 60 additions and 25 deletions
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51
underscore.js
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@@ -951,30 +951,43 @@
// JavaScript micro-templating, similar to John Resig's implementation.
// Underscore templating handles arbitrary delimiters, preserves whitespace,
// and correctly escapes quotes within interpolated code.
_.template = function(str, data) {
_.template = function(source, data) {
var settings = _.templateSettings;
var source = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};' +
'with(obj||{}){__p.push(\'' +
str
.replace(escaper, function(match) {
return '\\' + escapes[match];
})
.replace(settings.escape || noMatch, function(match, code) {
return "',\n_.escape(" + unescape(code) + "),\n'";
})
.replace(settings.interpolate || noMatch, function(match, code) {
return "',\n" + unescape(code) + ",\n'";
})
.replace(settings.evaluate || noMatch, function(match, code) {
return "');\n" + unescape(code) + "\n;__p.push('";
})
+ "');\n}\nreturn __p.join('');";
var render = new Function('obj', '_', source);
var varname = settings.varname || 'obj';
// Compile the template source, taking care to escape characters that
// cannot be included in a string literal and then unescape them in code
// blocks.
var compiled = "__p.push('" + source
.replace(escaper, function(match) {
return '\\' + escapes[match];
})
.replace(settings.escape || noMatch, function(match, code) {
return "',\n_.escape(" + unescape(code) + "),\n'";
})
.replace(settings.interpolate || noMatch, function(match, code) {
return "',\n" + unescape(code) + ",\n'";
})
.replace(settings.evaluate || noMatch, function(match, code) {
return "');\n" + unescape(code) + "\n;__p.push('";
}) + "');\n";
// If no varname is specified, place data values in local scope.
if (!settings.varname) compiled = 'with(obj||{}){\n' + compiled + '}\n';
compiled = 'var __p=[],print=function(){__p.push.apply(__p,arguments);};\n' +
compiled + "return __p.join('');\n";
var render = new Function(varname, '_', compiled);
if (data) return render(data, _);
var template = function(data) {
return render.call(this, data, _);
};
template.source = 'function(obj){\n' + source + '\n}';
// Provide the compiled function source as a convenience for build time
// precompilation.
template.compiled = 'function(' + varname + '){\n' + compiled + '\n}';
return template;
};