自定义Angular指令与jQuery实现的Bootstrap风格数据双向绑定的单选与多选下拉框

var comDirective = angular.module('easySelect', []);
comDirective.directive("easySelect", function () {
 return {
  link: function (scope, element, attrs) {
   var ngModel = $(element).attr("ng-model");
   if(!ngModel || ngModel.length == 0) {
    ngModel = "defaultSelectModel";
   }
   var status = false; //toggle boolean
   var valueMap = "";
   var optiOns= $(element).children();
   $(element).attr("style", "padding:0");
   //hide original options
   $.each(options, function (opt) {
    $(options[opt]).attr("style", "display:none");
   });
   //build ul
   var html = "
" +
    "
" +
    " 
" + //this is a dummy span
    "
"; //options' container
   if(attrs.multiple != undefined) {
    $.each(options, function (opt) {
     html += "
" + $(options[opt]).html() +
     "
";
    });
   } else {
    $.each(options, function (opt) {
     if($(options[opt]).attr("default") != undefined) {
      scope[ngModel] = $(options[opt]).val();
      valueMap = $(options[opt]).html();
      html += "
"
      + $(options[opt]).html() + "
";
     } else {
      html += "
"
      + $(options[opt]).html() + "
";
     }
    });
   }
   //if multiple, add button
   if (attrs.multiple != undefined) {
    html += "
 确定 
";
   }
   //render ui
   html += "
";
   $(element).append(html);
   $(".my-li-option").each(function(){
    $(this).fadeOut(0);
   });
   if(attrs.multiple == undefined)
    $($("#display-"+attrs.id).children()[0]).html(valueMap);
   //adjust width
   $("#" + attrs.id + "-root").width($("#" + attrs.id + "-root").width() + 2);
   //mouse leave event
   $(element).mouseleave(function(){
    $(".my-li-container").each(function(){
     $(this).attr("style","");
    });
    if(status) {
     $("#" + attrs.id + "-container").attr("style", "display:none");
     status = !status;
    }
   });
   //multiple select seems complex
   if (attrs.multiple != undefined) {
    //click event
    $(element).click(function (e) {
     //if click on tags, remove it
     if($(e.target).attr("for") == "option-tag") {
      // change val and digest change item in angular
      scope[ngModel] = $(element).val().replace($(e.target).attr("value"),"").replace(/;+/,";").replace(/^;/,"");
      $(element).val(scope[ngModel]);
      scope.$digest();
      $(e.target).remove();
      $(".my-li-option").each(function(){
       if($(this).attr("value") == $(e.target).attr("value")) {
        $(this).css("opacity","0.01");
       }
      });
     } else if($(this).attr("for") != 'ensure-li') {
      //toggle ul
      $("#" + attrs.id + "-container").attr("style", status &＃63; "display:none" : "");
      status = !status;
     }
    });
    $(".option-"+attrs.id).each(function(){
     $(this).on('click',function(){
      var selectValue = $(element).val();
      var currentValue = $(this).attr("value");
      var selected = false;
      //if option is selected ,remove it
      var temp = selectValue.split(";");
      $.each(temp,function(obj){
       if(temp[obj].indexOf(currentValue) != -1) {
        selected = true;
       }
      })
      if(selected) {
       $($(this).children()[1]).fadeTo(300,0.01);
       scope[ngModel] = $(element).val().replace(currentValue,"").replace(/;{2}/,";").replace(/^;/,"");
       $(element).val(scope[ngModel]);
       scope.$digest();
       $("#display-"+attrs.id + " span").each(function(){
        if($(this).attr("value") == currentValue) {
         $(this).remove();
        }
       });
      } else {
       //add option to val() and ui
       $($(this).children()[1]).fadeTo(300,1);
       scope[ngModel] = ($(element).val()+";"+currentValue).replace(/;{2}/,";").replace(/^;/,"");
       $(element).val(scope[ngModel]);
       scope.$digest();
       $("#display-"+attrs.id).append(
        ""
        +$(this).children()[0].innerHTML+ "");
      }
      status = !status; // prevent bubble
     });
     //control background
     $(this).mouseenter(function(){
      $(".my-li-container").each(function(){
       $(this).attr("style","");
      });
      $(this).attr("style","background-color:#eee");
     });
    });
   } else {
    $(".option-"+attrs.id).each(function(){
     $(this).mouseenter(function(){
      $(".my-li-container").each(function(){
       $(this).attr("style","");
      });
      $(this).attr("style","background-color:#eee");
     });
    });
    //single select ,just add value and remove ul
    $(element).click(function () {
     $("#" + attrs.id + "-container").attr("style", status &＃63; "display:none" : "");
     status = !status;
    });
    $(".option-"+attrs.id).each(function(){
     $(this).on('click',function(){
      scope[ngModel] = $(this).attr("value");
      $(element).val(scope[ngModel]);
      scope.$digest();
      console.log(ngModel);
      console.log(element.val());
      $($("#display-"+attrs.id).children()[0]).html($(this).html());
     });
    });
   }
  }
 }
});