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'use strict';
var $interpolateMinErr = minErr('$interpolate');
/**
* @ngdoc object
* @name ng.$interpolateProvider
* @function
*
* @description
*
* Used for configuring the interpolation markup. Defaults to `{{` and `}}`.
*
* @example
<doc:example>
<doc:source>
<script>
var myApp = angular.module('App', [], function($interpolateProvider) {
$interpolateProvider.startSymbol('//');
$interpolateProvider.endSymbol('//');
});
function Controller($scope) {
$scope.label = "Interpolation Provider Sample";
}
</script>
<div ng-app="App" ng-controller="Controller">
//label//
</div>
</doc:source>
</doc:example>
*/
function $InterpolateProvider() {
var startSymbol = '{{';
var endSymbol = '}}';
/**
* @ngdoc method
* @name ng.$interpolateProvider#startSymbol
* @methodOf ng.$interpolateProvider
* @description
* Symbol to denote start of expression in the interpolated string. Defaults to `{{`.
*
* @param {string=} value new value to set the starting symbol to.
* @returns {string|self} Returns the symbol when used as getter and self if used as setter.
*/
this.startSymbol = function(value){
if (value) {
startSymbol = value;
return this;
} else {
return startSymbol;
}
};
/**
* @ngdoc method
* @name ng.$interpolateProvider#endSymbol
* @methodOf ng.$interpolateProvider
* @description
* Symbol to denote the end of expression in the interpolated string. Defaults to `}}`.
*
* @param {string=} value new value to set the ending symbol to.
* @returns {string|self} Returns the symbol when used as getter and self if used as setter.
*/
this.endSymbol = function(value){
if (value) {
endSymbol = value;
return this;
} else {
return endSymbol;
}
};
this.$get = ['$parse', '$exceptionHandler', '$sce', function($parse, $exceptionHandler, $sce) {
var startSymbolLength = startSymbol.length,
endSymbolLength = endSymbol.length;
/**
* @ngdoc function
* @name ng.$interpolate
* @function
*
* @requires $parse
* @requires $sce
*
* @description
*
* Compiles a string with markup into an interpolation function. This service is used by the
* HTML {@link ng.$compile $compile} service for data binding. See
* {@link ng.$interpolateProvider $interpolateProvider} for configuring the
* interpolation markup.
*
*
<pre>
var $interpolate = ...; // injected
var exp = $interpolate('Hello {{name}}!');
expect(exp({name:'Angular'}).toEqual('Hello Angular!');
</pre>
*
*
* @param {string} text The text with markup to interpolate.
* @param {boolean=} mustHaveExpression if set to true then the interpolation string must have
* embedded expression in order to return an interpolation function. Strings with no
* embedded expression will return null for the interpolation function.
* @param {string=} trustedContext when provided, the returned function passes the interpolated
* result through {@link ng.$sce#getTrusted $sce.getTrusted(interpolatedResult,
* trustedContext)} before returning it. Refer to the {@link ng.$sce $sce} service that
* provides Strict Contextual Escaping for details.
* @returns {function(context)} an interpolation function which is used to compute the interpolated
* string. The function has these parameters:
*
* * `context`: an object against which any expressions embedded in the strings are evaluated
* against.
*
*/
function $interpolate(text, mustHaveExpression, trustedContext) {
var startIndex,
endIndex,
index = 0,
parts = [],
length = text.length,
hasInterpolation = false,
fn,
exp,
concat = [];
while(index < length) {
if ( ((startIndex = text.indexOf(startSymbol, index)) != -1) &&
((endIndex = text.indexOf(endSymbol, startIndex + startSymbolLength)) != -1) ) {
(index != startIndex) && parts.push(text.substring(index, startIndex));
parts.push(fn = $parse(exp = text.substring(startIndex + startSymbolLength, endIndex)));
fn.exp = exp;
index = endIndex + endSymbolLength;
hasInterpolation = true;
} else {
// we did not find anything, so we have to add the remainder to the parts array
(index != length) && parts.push(text.substring(index));
index = length;
}
}
if (!(length = parts.length)) {
// we added, nothing, must have been an empty string.
parts.push('');
length = 1;
}
// Concatenating expressions makes it hard to reason about whether some combination of concatenated
// values are unsafe to use and could easily lead to XSS. By requiring that a single
// expression be used for iframe[src], object[src], etc., we ensure that the value that's used
// is assigned or constructed by some JS code somewhere that is more testable or make it
// obvious that you bound the value to some user controlled value. This helps reduce the load
// when auditing for XSS issues.
if (trustedContext && parts.length > 1) {
throw $interpolateMinErr('noconcat',
"Error while interpolating: {0}\nStrict Contextual Escaping disallows " +
"interpolations that concatenate multiple expressions when a trusted value is " +
"required. See http://docs.angularjs.org/api/ng.$sce", text);
}
if (!mustHaveExpression || hasInterpolation) {
concat.length = length;
fn = function(context) {
try {
for(var i = 0, ii = length, part; i<ii; i++) {
if (typeof (part = parts[i]) == 'function') {
part = part(context);
if (trustedContext) {
part = $sce.getTrusted(trustedContext, part);
} else {
part = $sce.valueOf(part);
}
if (part == null || part == undefined) {
part = '';
} else if (typeof part != 'string') {
part = toJson(part);
}
}
concat[i] = part;
}
return concat.join('');
}
catch(err) {
var newErr = $interpolateMinErr('interr', "Can't interpolate: {0}\n{1}", text, err.toString());
$exceptionHandler(newErr);
}
};
fn.exp = text;
fn.parts = parts;
return fn;
}
}
/**
* @ngdoc method
* @name ng.$interpolate#startSymbol
* @methodOf ng.$interpolate
* @description
* Symbol to denote the start of expression in the interpolated string. Defaults to `{{`.
*
* Use {@link ng.$interpolateProvider#startSymbol $interpolateProvider#startSymbol} to change
* the symbol.
*
* @returns {string} start symbol.
*/
$interpolate.startSymbol = function() {
return startSymbol;
}
/**
* @ngdoc method
* @name ng.$interpolate#endSymbol
* @methodOf ng.$interpolate
* @description
* Symbol to denote the end of expression in the interpolated string. Defaults to `}}`.
*
* Use {@link ng.$interpolateProvider#endSymbol $interpolateProvider#endSymbol} to change
* the symbol.
*
* @returns {string} start symbol.
*/
$interpolate.endSymbol = function() {
return endSymbol;
}
return $interpolate;
}];
}