support select task files

app/scripts/controllers/task-detail.js

@@ -102,6 +102,27 @@
             return ariaNgSettingService.getFileListDisplayOrder();
         };
 
+        $scope.setSelectedFile = function () {
+            if (!$scope.task || !$scope.task.files) {
+                return;
+            }
+
+            var gid = $scope.task.gid;
+            var selectedFileIndex = [];
+
+            for (var i = 0; i < $scope.task.files.length; i++) {
+                var file = $scope.task.files[i];
+
+                if (file && file.selected) {
+                    selectedFileIndex.push(file.index);
+                }
+            }
+
+            return aria2TaskService.selectTaskFile(gid, selectedFileIndex, function () {
+                refreshDownloadTask(false);
+            });
+        };
+
         $scope.loadTaskOption = function (task) {
             $rootScope.loadPromise = aria2TaskService.getTaskOptions(task.gid, function (result) {
                 $scope.options = result;

app/scripts/services/aria2TaskService.js

@@ -70,6 +70,7 @@
                     var file = task.files[i];
                     file.fileName = getFileNameFromPath(file.path);
                     file.length = parseInt(file.length);
+                    file.selected = (file.selected == 'true');
                     file.completedLength = parseInt(file.completedLength);
                     file.completePercent = (file.length > 0 ? file.completedLength / file.length * 100 : 0);
                 }
@@ -150,6 +151,19 @@
                     callback: callback
                 });
             },
+            selectTaskFile: function (gid, selectedFileIndexArr, callback) {
+                var selectedFileIndex = '';
+                
+                for (var i = 0; i < selectedFileIndexArr.length; i++) {
+                    if (selectedFileIndex.length > 0) {
+                        selectedFileIndex += ',';
+                    }
+
+                    selectedFileIndex += selectedFileIndexArr[i];
+                }
+                
+                return this.setTaskOption(gid, 'select-file', selectedFileIndex, callback);
+            },
             getBtTaskPeers: function (gid, callback, silent) {
                 return aria2RpcService.getPeers({
                     gid: gid,

app/views/task-detail.html

@@ -136,11 +136,12 @@
                         </div>
                     </div>
                     <div class="task-table-body">
-                        <div class="row" ng-repeat="file in task.files | fileOrderBy: getFileListOrderType()">
+                        <div class="row" ng-repeat="file in task.files | fileOrderBy: getFileListOrderType()" data-file-index="{{file.index}}">
                             <div class="col-sm-8">
                                 <div class="checkbox checkbox-primary">
-                                    <input id="{{'file_' + $index}}" type="checkbox" ng-checked="file.selected == 'true'" disabled="disabled"/>
+                                    <input id="{{'file_' + file.index}}" type="checkbox" ng-disabled="!task || !task.files || task.files.length < 2 || (task.status != 'waiting' && task.status != 'paused')"
-                                    <label for="{{'file_' + $index}}" ng-bind="file.fileName"></label>
+                                           ng-model="file.selected" ng-change="setSelectedFile()"/>
+                                    <label for="{{'file_' + file.index}}" ng-bind="file.fileName"></label>
                                 </div>
                             </div>
                             <div class="col-sm-2">