我试图在字符串html中绑定一个page_elements数组和相应的.grid-cell索引，这样它就会在我的指令中显示在页面上。我存储给定单元格元素的索引，然后过滤它们以检索匹配的page_elements对象。
但是，我可以摆脱网格中ng-repeat的冗余，其中有多个元素。已删除的元素将替换为空对象{}，但应将其拼接，以便将网格元素保留在正确的位置。移动的元素应该能够放入其他网格单元格中。如果索引被正确分配，那么指令应该与angular-drag-and-drop-lists一起使用，如何解决？
如何在给定网格中仅显示匹配ng-repeat的{{1}}一次？例如现在page_elements page_elements在第三个网格的grid_id: 2中显示三次ng-repeat。如何删除永久页面元素对象并将单元格元素保存在正确的位置？在当前的解决方案中，Drag＆amp; Drop机制也被打破了。
当前代码段和jsfidde：
var app = angular.module('app', ['dndLists']);
app.controller('homeCtrl', function ($scope) {
$scope.html_string = "<div class='container'><div class='row'><div class='col-xs-12'><div class='row'><div class='col-xs-4 grid-cell'></div><div class='col-xs-4 grid-cell'></div><div class='col-xs-4 grid-cell'></div></div><div class='row'><div class='col-xs-4 grid-cell'></div><div class='col-xs-4 grid-cell'></div><div class='col-xs-4 grid-cell'></div></div></div></div></div>";
$scope.page_elements = [{
"grid_id": 0,
"position": 0,
"snippet": "<h4>First Grid 0</h4>",
"template": "snippet"
}, {
"grid_id": 0,
"position": 1,
"snippet": "<h2>Second Grid 0</h2>",
"template": "snippet"
}, {
"grid_id": 1,
"position": 0,
"snippet": "<h2>First Grid 1</h2>",
"template": "snippet"
}, {
"grid_id": 1,
"position": 1,
"snippet": "<h2>Second Grid 1</h2>",
"template": "snippet"
}, {
"grid_id": 2,
"position": 0,
"snippet": "<h1>First Grid 2</h1>",
"template": "snippet"
}, {
"grid_id": 2,
"position": 1,
"snippet": "<h2>Second Grid 0</h2>",
"template": "snippet"
}, {
"grid_id": 2,
"position": 2,
"snippet": "<h2>Third Grid 0</h2>",
"template": "snippet"
}, {
"grid_id": 5,
"position": 0,
"snippet": "<h2>Before Last</h2>",
"template": "snippet"
}, {
"grid_id": 5,
"position": 1,
"snippet": "<h2>Last</h2>",
"template": "snippet"
}];
$scope.page_elements_pretty = angular.toJson($scope.page_elements, true);
$scope.rmElement = function (i) {
debugger
};
})
.directive('grid', function ($compile) {
return {
restrict: 'E',
replace: true,
scope: {
html_string: '=htmlstring',
page_elements: '=pageelements'
},
link: function (scope, element, attrs) {
scope.$watch('html_string', function (html) {
element.html(html);
var grid_cell = element.find('.grid-cell');
for (var celli = 0; celli < grid_cell.length; ++celli) {
var cell_eli = '';
for (var eli = 0; eli < scope.page_elements.length; ++eli) {
if (scope.page_elements[eli].grid_id === celli) {
cell_eli += scope.page_elements.indexOf(scope.page_elements[eli]);
}
}
var cell_html = '<div class="layout-grid"><div class="drop-area"><div dnd-list="page_elements">';
cell_html += '<div ng-repeat="item in page_elements | cell_elements:\'' + cell_eli + '\'" dnd-draggable="item" dnd-moved="page_elements[page_elements.indexOf(item)].pop()" ng-click="page_elements[page_elements.indexOf(item)] = {}" ng-include="item.template + \'.html\'" dnd-effect-allowed="move"></div>';
cell_html += '</div></div></div>';
$(grid_cell[celli]).empty().append(cell_html);
}
$compile(element.contents())(scope);
});
}
};
}).filter('cell_elements', function () {
return function (page_elements, cell_eli_str) {
var cell_elms = cell_eli_str.split('').map(Number);
var matched = [];
for (var i = 0; i < page_elements.length; ++i) {
for (var j = 0; j < cell_elms.length; ++j) {
if (i === cell_elms[j]) {
matched.push(page_elements[i]);
}
}
}
return matched;
}
});.item {
min-height: 50px;
padding-left: 0px;
}
.drop-layout .layout-grid {
margin-bottom: 15px;
}
.drop-layout .layout-grid [class^=col-] {
background-color: #eee;
background-color: rgba(86, 61, 124, .15);
border: 1px solid #ddd;
border: 1px solid rgba(86, 61, 124, .2);
}
.drop-layout div[dnd-list], .drop-layout div[dnd-list] > div {
position: relative;
}
.drop-layout .drop-area div[dnd-list] {
min-height: 50px;
padding-left: 0px;
}
.drop-layout .drop-area div {
background-color: #eee;
border: 1px solid #ddd;
display: block;
padding: 0px;
}
.drop-layout .drop-area .dndDragging {
opacity: 0.7;
}
.drop-layout .drop-area .dndDraggingSource {
display: none;
}
.drop-layout .drop-area .dndPlaceholder {
background-color: #ddd;
background-color: rgba(86, 61, 124, .2);
min-height: 48px;
display: block;
position: relative;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<script src="https://rawgit.com/marceljuenemann/angular-drag-and-drop-lists/master/angular-drag-and-drop-lists.min.js"></script>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<div ng-app="app">
<div ng-controller="homeCtrl" class="drop-layout">
<h1>Grid:</h1>
<grid htmlstring="html_string" pageelements="page_elements"></grid>
<script type="text/ng-template" id="snippet.html">
<div class="item">{{item.snippet}} {{item.position}}</div>
</script>
<h1>Compile dynamic HTML</h1><h5>How to live preview of filled by elements html?</h5>
<textarea ng-model="html_string" rows="5" cols="100"></textarea>
<p>Assign elements to .grid-cells: <pre>{{page_elements}}</pre></p>
</div>
</div>