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javascript实现动态模态绑定grid过程代码_javascript技巧
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May 16, 2016 pm 04:35 PM
grid 模态绑定
<html> 
<head> 
  <style type="text/css"> 
    .grid{border:1px solid #808080; border-spacing:0; width:500px; border-collapse:collapse} 
    .grid th,.grid td{border:0; text-align:center;} 
    .grid tr{height:25px;line-height:25px;} 
    .grid tr.odd{background:#d0d0d0} 
    .grid .btn{width:80px; text-align:center}     
  </style> 
   
  <script type="text/javascript"> 
    (function(){ 
      // 
      var util = { 
        next:function next(ele){ 
          if(ele){ 
            var n = ele.nextSibling; 
            if(n && n.nodeType === 1){ 
              return n; 
            } 
            return next(n); 
          } 
        }, 
        parseJSON:function(str){ 
          if(typeof JSON !== "undefined"){ 
            return JSON.parse(str); 
          } 
          return eval("("+str+")"); 
        }, 
        parseArray:function(obj){ 
          if(!obj){ 
            return obj; 
          } 
          var result = []; 
          if(typeof obj.length !== "undefined"){ 
            try{ 
              var arr = Array.prototype.slice.call(obj,0); 
              result = arr; 
            }catch(e){ 
              for(var i=0;i<obj.length;i++){ 
                try{ 
                  var target = obj[i]; 
                }catch(e){ 
                  if(obj.item){ 
                    var target = this.item(i);//nodeList 
                  } 
                } 
                if(typeof target !== "undefined"){ 
                  result.push(target); 
                  delete target; 
                } 
              } 
            } 
          } 
          return result; 
        }, 
        isFunction:function(fn){ 
          return typeof fn === "function"; 
        }, 
        trim:function(str){ 
          if(typeof str !== "string"){ 
            return str; 
          } 
          return str.replace(/^\s+|\s+$/g,""); 
        }, 
        offset:function offset(ele){ 
          var result = {top:0,left:0}; 
          if(!ele || ele.nodeType !== 1){ 
            return result; 
          } 
          result.top = Number(ele.offsetTop || (ele.style.top || "0").replace(/[^\d]+$/,"")); 
          result.left = Number(ele.offsetLeft || (ele.style.left || "0").replace(/[^\d]+$/,"")); 
          if(ele.parentNode){ 
            var r = offset(ele.parentNode); 
            result.top += r.top; 
            result.left += r.left; 
          } 
          return result; 
        } 
      }; 
       
      //事件处理 
      var Event = { 
        on:function(eventType,fn){ 
          var element = this; 
          if(this.addEventListener){ 
            this.addEventListener(eventType,fn,false); 
          }else if(this.attachEvent){ 
             //将事件缓冲到该标签上,已解决this指向window(现fn内this指向element)和移除匿名事件问题             
            var _EventRef='_'+eventType+'EventRef'; 
            if(!element[_EventRef]){ 
              element[_EventRef]=[]; 
            } 
            var _EventRefs=element[_EventRef]; 
            var index; 
            for(index in _EventRefs){ 
              if(_EventRefs[index]['realFn']==fn){ 
                return; 
              } 
            } 
            var nestFn=function(){ 
              fn.apply(element,arguments); 
            }; 
            element[_EventRef].push({'realFn':fn,'nestFn':nestFn}); 
            element.attachEvent('on'+eventType,nestFn); 
          }           
        }, 
        remove:function(eventType,fn){      
          var element = this;    
          if(this.removeEventListener){ 
            this.removeEventListener(eventType,fn,false); 
          }else if(this.detachEvent){ 
            var _EventRef='_'+eventType+'EventRef'; 
            if(!element[_EventRef]){ 
              element[_EventRef]=[]; 
            } 
            var _EventRefs=element[_EventRef] 
            var index; 
            var nestFn; 
            for(index in _EventRefs){ 
              if(_EventRefs[index]['realFn']==fn){ 
                nestFn=_EventRefs[index]['nestFn']; 
                if(index==_EventRefs.length-1){ 
                  element[_EventRef]=_EventRefs.slice(0,index); 
                }else{ 
                  element[_EventRef]=_EventRefs.slice(0,index).concat(_EventRefs.slice(index+1,_EventRefs.length-1)); 
                } 
                break; 
              } 
            } 
            if(nestFn){ 
              element.detachEvent('on'+eventType,nestFn); 
            } 
          } 
        } 
      }; 
       
      //extend 
      (function(){ 
        //删除数组中指定下标出的元素 
        Array.prototype.remove = function(index){ 
          var o = this[index]; 
          if(typeof o !== "undefined"){ 
            if(index == 0){ 
              this.shift(); 
            }else if(index === this.length - 1){ 
              this.pop(); 
            }else{ 
              var arr1 = this.slice(0,index); 
              var arr2 = this.slice(index+1); 
              this.length = 0; 
              this.concat(arr1,arr2); 
            } 
          } 
        } 
        //删除数组中所有的元素 
        Array.prototype.clear = function(){ 
          this.length = 0; 
        } 
        //each 
        Array.prototype.each = function(fn){ 
          if(!util.isFunction(fn)){ 
            return; 
          } 
          for(var i=0;i<this.length;i++){ 
            if(typeof this[i] !== "undefined"){ 
              fn.call(this[i],i); 
            } 
          } 
        } 
         
        // 
        var collection = this.collection = function(){ 
          this.__data = {}; 
          this.length = 0; 
        } 
        collection.prototype = { 
          add:function(obj){ 
            this.__data[this.length++] = obj; 
          }, 
          get:function(index){ 
            return this.__data[index]; 
          }, 
          remove:function(index){ 
            var obj = this.__data[index]; 
            if(typeof obj !== "undefined"){ 
              this.length--; 
            } 
            delete this.__data[index]; 
          }, 
          clear:function(){ 
            this.__data = {}; 
            this.length = 0; 
          }, 
          each:function(fn){ 
            var index = 0; 
            for(var k in this.__data){ 
              if(k && typeof this.__data[k] !== "undefined"){ 
                fn.call(this.__data[k],index++); 
              } 
            } 
          }, 
          toArray:function(){ 
            var arr = []; 
            this.each(function(){ 
              arr.push(this); 
            }); 
            return arr; 
          } 
        }; 
      })(); 
      // 
      var grid = this.grid = function(table, options){ 
        grid.prototype._init.call(this,table,options); 
      } 
      grid.prototype = { 
        _init:function(table, options){ 
          if(typeof table === "undefined" || !table){ 
            throw "table is undefined or null"; 
          } 
          if(table.nodeType !== 1 || !/^table$/i.test(table.tagName)){ 
            throw "table must be 'table' element."; 
          } 
          table.guid = ++grid.guid; 
          this.__cache = {}; 
          var self = this; 
          var header = this.__cache["header"] = loadHeader();//header 
          this.__root = header.parentNode; 
          var templateRow = this.__cache["template"] = loadTemplate();//模板行 
          this.__cache["dataFormat"] = loadDataFormat();//数据模板 
          this.__cache["dataRows"] = new collection();//数据行 
          this.__cache["customCache"] = new collection();//用户缓存数据 
          this.__editRow = null;//当前编辑行 
          this.__saveContainer = createSaveButton();//保存按钮 
          this.__cache["commandHandles"] = {//command handels 
            removeRow:function(){ 
              var rowIndex = this.getAttribute("index"); 
              self.removeRow.apply(self,[rowIndex]); 
            }, 
            newLine:function(){ 
              self.newLine(); 
            } 
          }; 
          this.__regCommand = function(commandName,row){ //注册command 
            if(row){ 
              var arg = row.getAttribute("index"); 
              this.setAttribute("index",arg || false); 
            } 
            this.commandName = commandName; 
            Event.remove.call(this,"click",exec); 
            Event.on.call(this,"click",exec); 
          } 
          this.__removeRowCallback = function(){ //改变行的背景样式 
            var rows = this.__cache["dataRows"]; 
            var customCache = this.__cache["customCache"]; 
            var arr = rows.toArray(),dataArr=[]; 
            var rowIndex,row,data; 
             
            rows.clear(); 
            arr.each(function(i){ 
              rowIndex = this.getAttribute("index"); 
              data = customCache.get(rowIndex); 
              dataArr.push(data); 
              this.setAttribute("index",i.toString()); 
              rows.add(this); 
              if( i % 2 == 1){//基数行 
                if(!/\sodd\s|\sodd$/g.test(this.className)){ 
                  this.className = (this.className || "") + " odd"; 
                } 
              }else if(/\sodd\s|\sodd$/g.test(this.className)){ 
                this.className = this.className.replace(/\sodd\s|\sodd$/g," "); 
              } 
              i++; 
            }); 
             
            customCache.clear(); 
            dataArr.each(function(){ 
              customCache.add(this); 
            }); 
          }           
           
          //事件处理 
          options = options || {}; 
          this.onDataBinding = options.onDataBinding || this.onDataBinding; 
          this.onRowBinding = options.onRowBinding || this.onRowBinding; 
          this.onRowBinded = options.onRowBinded || this.onRowBinded;          
           
          function loadHeader(){ 
            var tr = table.firstChild; 
            if(tr && tr.nodeType != 1){ 
              tr = util.next(tr); 
            } 
            if(!/tr/i.test(tr.tagName)){ //如果第一个元素不是tr，则浏览器支持tbody 
              tr = tr.firstChild; 
              if(tr.nodeType != 1){ 
                tr = util.next(tr); 
              } 
            } 
            return tr; 
          } 
           
          function loadTemplate(){ 
            tr = util.next(header);//获取模板行 
            return tr; 
          } 
           
          function loadDataFormat(){ 
            var nodes = templateRow.childNodes,ele,data,result = {},attr; 
            nodes = util.parseArray(nodes); 
            nodes.each(function(i){ 
              ele = this; 
              if(ele && ele.nodeType == 1){ 
                attr = ele.data || ele.getAttribute("data"); 
                if(attr){ 
                  data = util.parseJSON(attr); 
                  ele.field = data.field; 
                  result[ele.field] = data; 
                } 
              } 
            });            
            return result; 
          } 
           
          function createSaveButton(){ 
            var div = document.createElement("div"); 
            div.style.position = "absolute"; 
            div.style.display = "none"; 
            div.style.width = "auto"; 
            var btn = document.createElement("button"); 
            btn.innerHTML = btn.innerText = btn.textContent = btn.value = "Save"; 
            try{ 
              btn.type = "button"; 
            }catch(e){ 
              btn.setAttribute("type","button"); 
            } 
            div.appendChild(btn); 
             
            var btnCancel = document.createElement("button"); 
            btnCancel.innerHTML = btnCancel.innerText = btnCancel.textContent = btnCancel.value = "Cancel"; 
            try{ 
              btnCancel.type = "button"; 
            }catch(e){ 
              btnCancel.setAttribute("type","button"); 
            } 
            div.appendChild(btnCancel); 
             
            document.body.appendChild(div); 
            Event.on.call(btn,"click",function(){ 
              self.save(); 
            }); 
            Event.on.call(btnCancel,"click",function(){ 
              div.style.display = "none"; 
              if(self.__editRow){ 
                self.__editRow.parentNode.removeChild(self.__editRow); 
                self.__editRow = null; 
              } 
            }); 
             
            return div; 
          } 
           
          function exec(){ 
            if(self.__editRow){//如果当前处于编辑模式，则禁用所有command 
              return; 
            } 
            var commandName = this.commandName; 
            var handler = self.__cache["commandHandles"][commandName];            
            if(handler){ 
              handler.call(this); 
            } 
          } 
           
          //去除模板行 
          templateRow.parentNode.removeChild(templateRow); 
           
          //处理表格中的command事件 
          var elements = header.getElementsByTagName("*"); 
          elements = util.parseArray(elements); 
          elements.each(function(){ 
            if(this.nodeType === 1){ 
              var commandName = this.command || this.getAttribute("command"); 
              if(commandName){ 
                self.__regCommand.call(this,commandName,header); 
              } 
            } 
          }); 
        }, 
        //bangding 
        bind:function(data){ 
          this.clear(); 
          if(data && data.length > 0){ 
            var self = this; 
            data.each(function(){ 
              self.append(this); 
            }); 
          } 
        }, 
        //清理表，删除所以除header以外的数据行 
        clear:function(){ 
          var rows = this.__cache["dataRows"],row; 
          rows.each(function(){ 
            row = this; 
            if(row){ 
              row.parentNode.removeChild(row); 
            } 
          }); 
          rows.clear();//清理rows 
        }, 
        //删除指定的行 
        removeRow:function(rowIndex){ 
          var rows = this.__cache["dataRows"]; 
          var row = rows.get(rowIndex); 
          if(row){ 
            var data = this.__cache["customCache"][rowIndex]; 
            row.parentNode.removeChild(row); 
            rows.remove(rowIndex); 
            //通知用户数据行被移除             
            if(util.isFunction(this.onRowRemoved)){ 
              this.onRowRemoved(data,row); 
            } 
          } 
          this.__removeRowCallback(); 
        }, 
        //添加 行  
        append:function(data){ 
          if(!data){ 
            return ; 
          } 
          var template = this.__cache["template"]; 
          var rows = this.__cache["dataRows"]; 
          var rowIndex = rows.length; 
          var tr = template.cloneNode(); 
          var customCache = this.__cache["customCache"]; 
          customCache.add(data); 
          //将数据行添加到table 
          this.__root.appendChild(tr); 
          var self = this; 
          var td,//数据单元格 
            dataFormat,//数据格式化器 
            value;//单元格中的给定的数据 
          tr.setAttribute("index",rowIndex.toString()); 
          //更改样式 
          if(rowIndex % 2 == 1){ 
            tr.className = (tr.className || "") + " odd"; 
          } 
          //通知 行数据绑定开始 
          if(util.isFunction(this.onRowBinding)){ 
            this.onRowBinding(rowIndex,tr); 
          } 
           
          var templateTD = template.firstChild; 
          while(templateTD){ 
            td = templateTD.cloneNode(true); 
            tr.appendChild(td); 
            if(td.nodeType == 1 && templateTD.field){ 
              dataFormat = this.__cache["dataFormat"][templateTD.field]; 
              td.removeAttribute("data"); 
              td.field = templateTD.field; 
              value = data[dataFormat.field]; 
              //通知单元格数据绑定事件 
              value = this.onDataBinding(dataFormat.field,value,td,data); 
              if(value !== false){//如果返回false，则不用做赋值操作 
                switch(dataFormat.render){ 
                  case "innerHTML": 
                    td.innerHTML = typeof value == "undefined" || value == null &#63; "" : value; 
                    break; 
                  case "innerText": 
                  default: 
                    td.innerText = td.textContent = typeof value == "undefined" || value == null &#63; "" : value; 
                    break; 
                } 
              } 
            } 
            templateTD = templateTD.nextSibling; 
          } 
          rows.add(tr); 
           
          //处理command 
          var elements = tr.getElementsByTagName("*"),ele,attr; 
          elements = util.parseArray(elements); 
          elements.each(function(){ 
            ele = this; 
            if(ele.nodeType == 1 && (ele.command || ele.getAttribute("command"))){ 
              attr = ele.command || ele.getAttribute("command"); 
              self.__regCommand.call(ele,attr,tr); 
            } 
          }); 
           
          //通知 行数据绑定完成 
          if(util.isFunction(this.onRowBinded)){ 
            this.onRowBinded(rowIndex,tr); 
          } 
        }, 
        //手动产生新的输入行 
        newLine:function(){ 
          if(this.__editRow){//如果当前有存在编辑行，则直接返回，每次最多限制编辑一行数据 
            return; 
          } 
          var template = this.__cache["template"] ; 
          var row = this.__editRow = template.cloneNode(false); 
          var templateTD = template.firstChild; 
          var textareaList = []; 
                       
          while(templateTD){ 
            td = templateTD.cloneNode(true); 
            row.appendChild(td); 
            if(td.nodeType == 1){ 
              if(templateTD.field){ 
                td.field = templateTD.field; 
                td.innerHTML = ""; 
                var dataFormat = this.__cache["dataFormat"][templateTD.field]; 
                var textarea = null; 
                if(dataFormat.render == "innerHTML"){ 
                  textarea = document.createElement("textarea"); 
                }else{ 
                  textarea = document.createElement("input"); 
                  textarea.type = "text"; 
                } 
                textarea.style.display = "none"; 
                td.appendChild(textarea); 
                textareaList.push(textarea); 
              } 
            } 
            templateTD = templateTD.nextSibling; 
          } 
          //将数据行添加到table 
          this.__root.appendChild(row); 
           
          var height = row.offsetHeight, 
            width = row.offsetWidth, 
            offset = util.offset(row); 
             
          textareaList.each(function(){ 
            this.style.height = (0.8 * height) + "px"; 
            this.style.width = (0.8 * this.parentNode.offsetWidth) + "px"; 
            this.style.display = ""; 
          }); 
           
          var left = offset.left + width + 5; 
          var top = offset.top; 
          this.__saveContainer.style.top = top + "px"; 
          this.__saveContainer.style.left = left + "px"; 
          this.__saveContainer.style.height = this.__saveContainer.style.lineHeight = height + "px"; 
          this.__saveContainer.style.display = "block"; 
        }, 
        //保存手动产生的数据行数据 
        save:function(){ 
          if(!this.__editRow){ 
            return; 
          } 
           
          var row = this.__editRow; 
          var td = row.firstChild; 
          var data = {}; 
          while(td){ 
            if(td.nodeType === 1 && td.field){ 
              var dataFormat = this.__cache["dataFormat"][td.field]; 
              var textarea = null; 
              if(dataFormat.render == "innerHTML"){ 
                textarea = td.getElementsByTagName("textarea")[0]; 
              }else{ 
                textarea = td.getElementsByTagName("input")[0]; 
              } 
              value = textarea.value; 
              switch(dataFormat.dataType){ 
                case "number": 
                  value = util.trim(value); 
                  value = Number(value.length == 0 &#63; 0 : value); 
                  break; 
                default: 
                  break; 
              } 
              data[td.field] = value; 
            } 
            td = td.nextSibling; 
          } 
          this.__editRow.parentNode.removeChild(this.__editRow); 
          this.__editRow = null; 
          this.__saveContainer.style.display = "none"; 
           
          //通知用户正在保存数据 
          if(util.isFunction(this.onSaving)){ 
            this.onSaving(data); 
          } 
           
          this.append(data); 
        }, 
        getRowData:function(rowIndex){ 
          return this.__cache["customCache"].get(rowIndex); 
        }, 
         
        //数据绑定到指定cell时的事件 
        onDataBinding:function(field,value,cell,data){ 
          return value; 
        }, 
        //当数据行绑定开始时的事件 
        onRowBinding:function(rowIndex, row){ 
        }, 
        //当数据行绑定完成时的事件 
        //@param row {DOM element tr}  
        onRowBinded:function(rowIndex, row){ 
        }, 
        //当编辑的数据被保存时的事件 
        onSaving:function(data){ 
        }, 
        //当数据行被移除时的通知事件 
        onRowRemoved:function(data,row){ 
        } 
      }; 
       
      grid.guid = 0; 
    })(); 
     
     
  </script> 
</head> 
 
<body> 
  <table id="table_demo" class="grid"> 
    <tr class="odd"> 
      <th>ID</th> 
      <th>Name</th> 
      <th>Descpription</th> 
      <th><button type="button" command="newLine" class="btn">New Line</button></th> 
    </tr> 
    <tr> 
      <td data='{"field":"id","dataType":"number","render":"innerText"}'>1</td> 
      <td data='{"field":"name","dataType":"string","render":"innerText"}'>WorkingService</td> 
      <td data='{"field":"description","dataType":"string","render":"innerHTML"}'>WorkingService</td> 
      <td> 
        <button type="button" command="removeRow" class="btn">Delete</button> 
      </td> 
    </tr> 
  </table> 
  <script type="text/javascript"> 
    var table = document.getElementById("table_demo"); 
    var g = new grid(table,{ 
      onDataBinding:function(field,value){ 
        return value; 
      }, 
      onRowBinded:function(rowIndex,row){} 
    }); 
    g.bind([ 
      {id:0,name:"kilin"}, 
      {id:1,name:"kilin1"}, 
      {id:2,name:"kilin2"}, 
      {id:3,name:"kilin3"} 
    ]); 
  </script> 
</body> 
</html>
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