Observable constructor

Implementation

Observable(this.key, dynamic value, {this.scope, OnChangeCallback? listener, this.getter, this.setter, this.lazyEvaluation = false})
{
  if (value is String)
  {
    // bindings?
    if (this is! BlobObservable) bindings = Binding.getBindings(value, scope: scope);
    if (bindings != null)
    {
      // replace the "this" operator
      if (value.contains("this") && key != null)
      {
        String id = key!.split(".").first;

        // replace "this" with the id in the signature
        for(Binding binding in bindings!) {
          if (binding.source == "this")
        {
          var signature = binding.signature.replaceFirst("this",id);
          value = (value as String).replaceAll(binding.signature, signature);
        }
        }

        // requery the bindings
        bindings = Binding.getBindings(value, scope: scope);
      }

      // save the signature
      signature = value;
    }

    // eval?
    isEval = isEvalSignature(value);
    if (_isEval == true)
    {
      value = getEvalSignature(value);
      signature = value;
    }

    ///////////
    /* 2-way */
    ///////////
    String t = '@{';
    if ((bindings != null) && (bindings!.length == 1) && (value.trim().toLowerCase().startsWith(t)) && (value.trim().toLowerCase().endsWith('}')))
    {
      twoway = true;
      value = (value as String).substring(1);
      signature = value;
    }
  }

  ///////////////////
  /* Set the Value */
  ///////////////////
  if (bindings == null) _value = to(value);

  ////////////////////////
  /* Perform Evaluation */
  ////////////////////////
  if ((isEval) || bindings != null) onObservableChange(null);

  //////////////////
  /* Add Listener */
  //////////////////
  if (listener != null) registerListener(listener);

  //////////////
  /* Register */
  //////////////
  if (scope != null) scope!.register(this);

  ////////////
  /* Notify */
  ////////////
  notifyListeners();
}