跨所有浏览器的event事件工具函数

骑猪看日落 2022-07-12 13:58 157阅读 0赞

/** *跨所有浏览器的event事件工具类 */
    var EventUtil={
        //增加事件
        /** * element 要操作的元素，事件名称，事件处理程序函数 */
        addHandler:function(element,type,handler){
            if(element.addEventListener){
       //DOM2
                element.addEventListener(type,handler,false);
            }else if(element.attachEvent){
       //IE
                element.attachEvent("on"+type,handler);
            }else{
       //DOM0
                element["on"+type] = handler;
            }
        },
        /** * element 要操作的元素，事件名称，事件处理程序函数 */
        removeHandler:function(element,type,handler){
            if(element.removeEventListener){
       //DOM2
                element.removeEventListener(type,handler,false);
            }else if(element.detachEvent){
       //IE
                element.detachEvent("on"+type,handler);
            }else{
       //DOM0
                element["on"+type] = null;
            }
        },
        /** * 获得event对象 window.event(IE) */
        getEvent:function(event){
            return event?event:window.event;
        },
        /** * 获得目标对象 srcElement(IE) */
        getTarget:function(event){
            return event.target||event.srcElement;
        },
        /** * 阻止特定事件的默认行为，例如阻止超链接的默认行为 */
        preventDefault:function(event){
            if(event.preventDefault){
       //DOM事件
                event.preventDefault();
            }else{
       //IE
                event.returnValue=false;
            }
        },
        /** * 停止进一步的事件捕获或者冒泡 */
        stopPropagation:function(){
            if(event.stopPropagation){
       //DOM事件
                event.stopPropagation();
            }else{
       //IE
                event.cancelBubble == true;
            }
    
        },
        /** *mouseover,mouseout 失去光标元素和获得光标元素 * @param event * @returns */
        getRelatedTarget:function(event){
            if(event.relatedTarget){
       //DOM
                return event.relatedTarget;
            }else if(event.toElement){
       //IE mouseover
                return event.toElement;
            }else if(event.fromElement){
       //IE mouseout
                return event.fromElement;
            }else{
                return null;
            }
        },
        /** * DOM中 0==鼠标左键 1==鼠标中间的滑轮 2==鼠标右键 * IE中要对8中按钮属性值进行规范处理 * @param event * @returns */
        getButton:function(event){
            if(document.implementation.hasFeature("MouseEvents", "2.0")){
       //DOM
                return event.button;
            }else{
       //IE
                switch(event.button){
                    case 0:
                    case 1:
                    case 3:
                    case 5:
                    case 7:
                        return 0;
                    case 2:
                    case 6:
                        return 2;
                    case 4:
                        return 1;
                }
            }
        },
        /** * 获得键盘的ASCII码，可通过String.fromCharCode();转换成实际的字符 */
        getCharCode:function(event){
            if(typeof event.charCode ==  "number"){
       //FF ,Chrome,safari
                return event.charCode;
            }else{
       //IE Opera
                return event.keyCode;
            }
        },
        /*** * 获得鼠标滚轮的增量值 默认120 */
        getWheelDeta:function(event){
            if(event.wheelDelta){
                return (client.engine.opera&&client.engine.opera<9.5?-event.wheelDelta:event.wheelDelta);
            }else{
       //FF
                return -event.detail*40;
            }
        },
        /** * element仅限于哪些可以用鼠标选择文本的 textarea ,input之类的控件.获得选择的文本内容 * @param element */
        getSelectedText:function(element){
            if(document.selection){
       //IE
                return document.selection.createRange().text;
            }else{
                return element.value.substring(element.selectionStart,element.selectionEnd);
            }
        },
        /** * 设置选择文本 * @param textbox * @param startIndex * @param stopIndex */
        setSelectText:function(textbox,startIndex,stopIndex){
            if(textbox.setSelectionRange){
                textbox.setSelectionRange(startIndex,stopIndex);
            }else if(textbox.createTextRange){
                var range=textbox.createTextRange();
                range.collapse();
                range.moveStart("character",startIndex);
                range.moveEnd("character",stopIndex-startIndex);
                range.select();
            }
            textbox.focus();
        },
        /** * 屏蔽键盘上输入非数值字符 firefox 非字符键触发的keypress时间对于字符编码0，ksafari3，则对于8 * @param event */
        preventNotNumber:function(event){
            event=this.getEvent(event);
            var target=this.getTarget(event);
            var charCode=this.getCharCode(event);
            if(!/\d/.test(String.fromCharCode(charCode))&&charCode>9&&!event.ctrlKey){
                this.preventDefault(event);
            }
    
        },
        /** * 获得粘贴板内容 * @param event * @returns */
        getClipboardText:function(event){
            var clipboardData=(event.clipboardData || window.clipboardData);
            return clipboardData.getData("text");
        },
        /** * 设置粘贴板内容 * @param event * @returns */
        setClipboardText:function(event){
            if(event.clipboardData){
       //safari,chrome
                return event.clipboardData.setData("text/plain",value);
            }else if(window.clipboardData){
       //IE
                return window.clipboardData.setData("text");
            }
        },
        /** * 自动切换焦点,<input type="text" id="textTel1" maxlength="3"/> * EventUtil.addHandler("textbox1","keyup",tabForward) */
        tabForward:function(event){
            event=this.getEvent(event);
            var target=this.getTarget(event);
            if(target.value.length == target.maxLength){
                var form = target.form;
                for(var i=0,len=form.elements.length;i<len;i++){
                    if(form.elements[i]==target){
                        form.elements[i+1].foucs();
                        return;
                    }
                }
            }
        },
        /** * 序列化form表单 */
        serializeForm:function(form){
            var parts=new Array();
            var field=null;
            for(var i=0,len=form.elements.length;i<len;i++){
                field=form.elements[i];
                switch(field.type){
                case "select-one":
                case "select-multiple":
                   for(var j=0,oplen=field.options.length;j<oplen;j++){
                       var option=field.options[j];
                       if(option.selected){
                           var optValue="";
                           if(option.hasAttribute){
                               optValue=option.hasAttribute("value")?option.value:option.text;
                           }else{
                               optValue=option.attributes["value"].specified?option.value:option.text;
                           }
                           parts.push(encodeURIComponent(field.name)+"="+encodeURIComponent(optValue));
                       }
                   }
                  break;
    
                case undefined:
                case "file":
                case "submit":
                case "reset":
                case "button":
                    break;
                case "radio":
                case "checkbox":
                    if(!field.checked){
                        break;
                    }
                default:
                    parts.push(encodeURIComponent(field.name)+"="+encodeURIComponent(field.value));
                }
            }
            return parts.join("&");
        },
        contains:function(refNode,otherNode){
               if(typeof refNode.contains == "function" && (!client.engine.webkit||client.engine.webkit>=522)){
                   return refNode.contains(otherNode);
               }else if(typeof refNode.compareDocumentPostion=="function"){
                   return !!(refNode.compareDocumentPostion(otherNode)&16);
               }else{
                   var node=otherNode.parentNode;
                   do{
                       if(node==refNode){
                           return true;
                       }else{
                           node=node.parentNode;
                       }
                   }while(node!==null)
                   return false;
               }
           }
    
    
    }