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'use strict';
function $InterpolateProvider(){
this.$get = ['$parse', function($parse){
return function(text, templateOnly) {
var bindings = parseBindings(text);
if (hasBindings(bindings) || !templateOnly) {
return compileBindTemplate(text);
}
};
}];
}
var bindTemplateCache = {};
function compileBindTemplate(template){
var fn = bindTemplateCache[template];
if (!fn) {
var bindings = [];
forEach(parseBindings(template), function(text){
var exp = binding(text);
bindings.push(exp
? function(scope, element) { return scope.$eval(exp); }
: function() { return text; });
});
bindTemplateCache[template] = fn = function(scope, element, prettyPrintJson) {
var parts = [],
hadOwnElement = scope.hasOwnProperty('$element'),
oldElement = scope.$element;
// TODO(misko): get rid of $element
scope.$element = element;
try {
for (var i = 0; i < bindings.length; i++) {
var value = bindings[i](scope, element);
if (isElement(value))
value = '';
else if (isObject(value))
value = toJson(value, prettyPrintJson);
parts.push(value);
}
return parts.join('');
} finally {
if (hadOwnElement) {
scope.$element = oldElement;
} else {
delete scope.$element;
}
}
};
}
return fn;
}
function parseBindings(string) {
var results = [];
var lastIndex = 0;
var index;
while((index = string.indexOf('{{', lastIndex)) > -1) {
if (lastIndex < index)
results.push(string.substr(lastIndex, index - lastIndex));
lastIndex = index;
index = string.indexOf('}}', index);
index = index < 0 ? string.length : index + 2;
results.push(string.substr(lastIndex, index - lastIndex));
lastIndex = index;
}
if (lastIndex != string.length)
results.push(string.substr(lastIndex, string.length - lastIndex));
return results.length === 0 ? [ string ] : results;
}
function binding(string) {
var binding = string.replace(/\n/gm, ' ').match(/^\{\{(.*)\}\}$/);
return binding ? binding[1] : null;
}
function hasBindings(bindings) {
return bindings.length > 1 || binding(bindings[0]) !== null;
}
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