Function getterFn

tools/ngui/static/js/lib/angular.js:6528–6577

(path, csp)

}

function getterFn(path, csp) {
  if (getterFnCache.hasOwnProperty(path)) {
    return getterFnCache[path];
  }

  var pathKeys = path.split('.'),
      pathKeysLength = pathKeys.length,
      fn;

  if (csp) {
    fn = (pathKeysLength < 6)
        ? cspSafeGetterFn(pathKeys[0], pathKeys[1], pathKeys[2], pathKeys[3], pathKeys[4])
        : function(scope, locals) {
          var i = 0, val;
          do {
            val = cspSafeGetterFn(
                    pathKeys[i++], pathKeys[i++], pathKeys[i++], pathKeys[i++], pathKeys[i++]
                  )(scope, locals);

            locals = undefined; // clear after first iteration
            scope = val;
          } while (i < pathKeysLength);
          return val;
        }
  } else {
    var code = 'var l, fn, p;\n';
    forEach(pathKeys, function(key, index) {
      code += 'if(s === null || s === undefined) return s;\n' +
              'l=s;\n' +
              's='+ (index
                      // we simply dereference 's' on any .dot notation
                      ? 's'
                      // but if we are first then we check locals first, and if so read it first
                      : '((k&&k.hasOwnProperty("' + key + '"))?k:s)') + '["' + key + '"]' + ';\n' +
              'if (s && s.then) {\n' +
                ' if (!("$$v" in s)) {\n' +
                  ' p=s;\n' +
                  ' p.$$v = undefined;\n' +
                  ' p.then(function(v) {p.$$v=v;});\n' +
                  '}\n' +
                ' s=s.$$v\n' +
              '}\n';
    });
    code += 'return s;';
    fn = Function('s', 'k', code); // s=scope, k=locals
    fn.toString = function() { return code; };
  }

  return getterFnCache[path] = fn;
}

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