IriSP.createAnnotationWidget = function(Popcorn, config, Serializer) {

  IriSP.Widget.call(this, Popcorn, config, Serializer);

  this._hidden = true;

  this.keywords = IriSP.widgetsDefaults["createAnnotationWidget"].keywords;

  this.ids = {}; /* a dictionnary linking buttons ids to keywords */

};

IriSP.createAnnotationWidget.prototype = new IriSP.Widget();

IriSP.createAnnotationWidget.prototype.clear = function() {

    this.selector.find(".Ldt-SaTitle").text("");

    this.selector.find(".Ldt-SaDescription").text("");

    this.selector.find(".Ldt-SaKeywordText").text("");

};

IriSP.createAnnotationWidget.prototype.draw = function() {

  var _this = this;

	this.selector.append(annotationMarkup);

  this.selector.hide();

  for (var i = 0; i < this.keywords.length; i++) {

    var keyword = this.keywords[i];

    var id = IriSP.guid("button_");

    var templ = IriSP.templToHTML("<button id={{id}} class='Ldt-createAnnotation-absent-keyword'>{{keyword}}</button>", 

                                  {keyword: keyword, id: id});

    this.ids[keyword] = id; // save it for the function that handle textarea changes.

    this.selector.find(".Ldt-createAnnotation-keywords").append(templ);

    this.selector.find("#" + id).click(function(keyword) { return function() {

      var contents = _this.selector.find(".Ldt-createAnnotation-Description").val();

      if (contents.indexOf(keyword) != -1) {

        var newVal = contents.replace(keyword, "");        

      } else {

        var newVal = contents + keyword;      

      }

      _this.selector.find(".Ldt-createAnnotation-Description").val(newVal);

      // also call our update function.

      _this.handleTextChanges();

    }

   }(keyword));

  }

  this.selector.find(".Ldt-createAnnotation-Description")

               .bind("propertychange keyup input paste", IriSP.wrap(this, this.handleTextChanges));

  this._Popcorn.listen("IriSP.PlayerWidget.AnnotateButton.clicked", 

                        IriSP.wrap(this, this.handleAnnotateSignal));  

};

IriSP.createAnnotationWidget.prototype.handleAnnotateSignal = function() {

  if (this._hidden == false) {

    this.selector.hide();

    this._hidden = true;

  } else {

    this.selector.show();

    this._hidden = false;

  }

};

/** watch for changes in the textfield and change the buttons accordingly */

IriSP.createAnnotationWidget.prototype.handleTextChanges = function(event) {

  var contents = this.selector.find(".Ldt-createAnnotation-Description").val();

  for(var keyword in this.ids) {

    var id = this.ids[keyword];

    if (contents.indexOf(keyword) != -1) {

      /* the word is present in the textarea but the button is not toggled */

      if (this.selector.find("#" + id).hasClass("Ldt-createAnnotation-absent-keyword"))

          this.selector.find("#" + id).removeClass("Ldt-createAnnotation-absent-keyword")

                                      .addClass("Ldt-createAnnotation-present-keyword");      

    } else {

      /* the word is absent from the textarea but the button is toggled */

      if (this.selector.find("#" + id).hasClass("Ldt-createAnnotation-present-keyword")) {

          this.selector.find("#" + id).removeClass("Ldt-createAnnotation-present-keyword")

                                      .addClass("Ldt-createAnnotation-absent-keyword");

      }

    }

  }

};