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angular-tree-control.js
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(function ( angular ) {
'use strict';
angular.module( 'treeControl', [] )
.directive( 'treecontrol', ['$compile', function( $compile ) {
/**
* @param cssClass - the css class
* @param addClassProperty - should we wrap the class name with class=""
*/
function classIfDefined(cssClass, addClassProperty) {
if (cssClass) {
if (addClassProperty)
return 'class="' + cssClass + '"';
else
return cssClass;
}
else
return "";
}
function ensureDefault(obj, prop, value) {
if (!obj.hasOwnProperty(prop))
obj[prop] = value;
}
return {
restrict: 'EA',
require: "treecontrol",
transclude: true,
scope: {
treeModel: "=",
selectedNode: "=?",
selectedNodes: "=?",
expandedNodes: "=?",
onSelection: "&",
onNodeToggle: "&",
bindFunctionsTo: "=?",
options: "=?",
orderBy: "@",
reverseOrder: "@",
filterExpression: "=?",
filterComparator: "=?"
},
controller: ['$scope', '$timeout', function( $scope, $timeout ) {
$scope.visibleNodes = [];
$scope.nodeIdMap = {};
if($scope.bindFunctionsTo) {
$scope.bindFunctionsTo = {
selectFirst: function() {
$timeout(function () {
if($scope.selectedIndex() === 0) return;
$scope.selectNodeLabel($scope.visibleNodes[0]);
}, 0);
},
selectPrevious: function() {
$timeout(function () {
if($scope.selectedIndex() === 0) return;
$scope.selectNodeLabel($scope.visibleNodes[$scope.selectedIndex()-1]);
}, 0);
},
selectNext: function() {
$timeout(function () {
if($scope.selectedIndex() === $scope.visibleNodes.length-1) return;
$scope.selectNodeLabel($scope.visibleNodes[$scope.selectedIndex()+1]);
}, 0);
},
selectLast: function() {
$timeout(function () {
if($scope.selectedIndex() === $scope.visibleNodes.length-1) return;
$scope.selectNodeLabel($scope.visibleNodes[$scope.visibleNodes.length-1]);
}, 0);
},
expandNode: function() {
$timeout(function () {
var nodeObj = {$id: $scope.nodeIdMap[$scope.selectedNode.id], node: $scope.selectedNode};
if(!$scope.selectedNode || $scope.nodeExpanded.call(nodeObj)) return;
$scope.selectNodeHead.call(nodeObj);
}, 0);
},
collapseNode: function() {
$timeout(function () {
var nodeObj = {$id: $scope.nodeIdMap[$scope.selectedNode.id], node: $scope.selectedNode};
if(!$scope.selectedNode || !$scope.nodeExpanded.call(nodeObj)) return;
$scope.selectNodeHead.call(nodeObj);
}, 0);
}
};
}
function defaultIsLeaf(node) {
return !node[$scope.options.nodeChildren] || node[$scope.options.nodeChildren].length === 0;
}
function shallowCopy(src, dst) {
if (angular.isArray(src)) {
dst = dst || [];
for ( var i = 0; i < src.length; i++) {
dst[i] = src[i];
}
} else if (angular.isObject(src)) {
dst = dst || {};
for (var key in src) {
if (hasOwnProperty.call(src, key) && !(key.charAt(0) === '$' && key.charAt(1) === '$')) {
dst[key] = src[key];
}
}
}
return dst || src;
}
function defaultEquality(a, b) {
if (a === undefined || b === undefined)
return false;
a = shallowCopy(a);
a[$scope.options.nodeChildren] = [];
b = shallowCopy(b);
b[$scope.options.nodeChildren] = [];
return angular.equals(a, b);
}
$scope.options = $scope.options || {};
ensureDefault($scope.options, "multiSelection", false);
ensureDefault($scope.options, "nodeChildren", "children");
ensureDefault($scope.options, "dirSelectable", "true");
ensureDefault($scope.options, "injectClasses", {});
ensureDefault($scope.options.injectClasses, "ul", "");
ensureDefault($scope.options.injectClasses, "li", "");
ensureDefault($scope.options.injectClasses, "liSelected", "");
ensureDefault($scope.options.injectClasses, "iExpanded", "");
ensureDefault($scope.options.injectClasses, "iCollapsed", "");
ensureDefault($scope.options.injectClasses, "iLeaf", "");
ensureDefault($scope.options.injectClasses, "label", "");
ensureDefault($scope.options.injectClasses, "labelSelected", "");
ensureDefault($scope.options, "equality", defaultEquality);
ensureDefault($scope.options, "isLeaf", defaultIsLeaf);
$scope.selectedNodes = $scope.selectedNodes || [];
$scope.expandedNodes = $scope.expandedNodes || [];
$scope.expandedNodesMap = {};
for (var i=0; i < $scope.expandedNodes.length; i++) {
$scope.expandedNodesMap[""+i] = $scope.expandedNodes[i];
}
$scope.parentScopeOfTree = $scope.$parent;
function isSelectedNode(node) {
if (!$scope.options.multiSelection && ($scope.options.equality(node, $scope.selectedNode)))
return true;
else if ($scope.options.multiSelection && $scope.selectedNodes) {
for (var i = 0; (i < $scope.selectedNodes.length); i++) {
if ($scope.options.equality(node, $scope.selectedNodes[i])) {
return true;
}
}
return false;
}
}
$scope.headClass = function(node) {
var liSelectionClass = classIfDefined($scope.options.injectClasses.liSelected, false);
var injectSelectionClass = "";
if (liSelectionClass && isSelectedNode(node))
injectSelectionClass = " " + liSelectionClass;
if ($scope.options.isLeaf(node))
return "tree-leaf" + injectSelectionClass;
if ($scope.expandedNodesMap[this.$id])
return "tree-expanded" + injectSelectionClass;
else
return "tree-collapsed" + injectSelectionClass;
};
$scope.iBranchClass = function() {
if ($scope.expandedNodesMap[this.$id])
return classIfDefined($scope.options.injectClasses.iExpanded);
else
return classIfDefined($scope.options.injectClasses.iCollapsed);
};
$scope.nodeExpanded = function() {
return !!$scope.expandedNodesMap[this.$id];
};
$scope.selectNodeHead = function() {
var expanding = $scope.expandedNodesMap[this.$id] === undefined;
$scope.expandedNodesMap[this.$id] = (expanding ? this.node : undefined);
if (expanding) {
$scope.expandedNodes.push(this.node);
}
else {
var index;
for (var i=0; (i < $scope.expandedNodes.length) && !index; i++) {
if ($scope.options.equality($scope.expandedNodes[i], this.node)) {
index = i;
}
}
if (index != undefined)
$scope.expandedNodes.splice(index, 1);
}
if ($scope.onNodeToggle)
$scope.onNodeToggle({node: this.node, expanded: expanding});
};
$scope.selectNodeLabel = function( selectedNode ){
if(!$scope.options.isLeaf(selectedNode) && !$scope.options.dirSelectable) {
this.selectNodeHead();
}
else {
var selected = false;
if ($scope.options.multiSelection) {
var pos = -1;
for (var i=0; i < $scope.selectedNodes.length; i++) {
if($scope.options.equality(selectedNode, $scope.selectedNodes[i])) {
pos = i;
break;
}
}
if (pos === -1) {
$scope.selectedNodes.push(selectedNode);
selected = true;
} else {
$scope.selectedNodes.splice(pos, 1);
}
} else {
if (!$scope.options.equality(selectedNode, $scope.selectedNode)) {
$scope.selectedNode = selectedNode;
selected = true;
}
else {
$scope.selectedNode = undefined;
}
}
if ($scope.onSelection)
$scope.onSelection({node: selectedNode, selected: selected});
}
};
$scope.selectedIndex = function() {
return $scope.visibleNodes.indexOf($scope.selectedNode);
};
$scope.selectedClass = function() {
var isThisNodeSelected = isSelectedNode(this.node);
var labelSelectionClass = classIfDefined($scope.options.injectClasses.labelSelected, false);
var injectSelectionClass = "";
if (labelSelectionClass && isThisNodeSelected)
injectSelectionClass = " " + labelSelectionClass;
return isThisNodeSelected?"tree-selected" + injectSelectionClass:"";
};
//tree template
var orderBy = $scope.orderBy ? ' | orderBy:orderBy:reverseOrder' : '';
var template =
'<ul '+classIfDefined($scope.options.injectClasses.ul, true)+'>' +
'<li ng-repeat="node in node.' + $scope.options.nodeChildren + ' | filter:filterExpression:filterComparator ' + orderBy + '" ng-class="headClass(node)" '+classIfDefined($scope.options.injectClasses.li, true)+'>' +
'<i class="tree-branch-head" ng-class="iBranchClass()" ng-click="selectNodeHead(node)"></i>' +
'<i class="tree-leaf-head '+classIfDefined($scope.options.injectClasses.iLeaf, false)+'"></i>' +
'<div class="tree-label '+classIfDefined($scope.options.injectClasses.label, false)+'" ng-class="selectedClass()" ng-click="selectNodeLabel(node)" tree-transclude></div>' +
'<treeitem ng-if="nodeExpanded()"></treeitem>' +
'</li>' +
'</ul>';
this.template = $compile(template);
}],
compile: function(element, attrs, childTranscludeFn) {
return function ( scope, element, attrs, treemodelCntr ) {
scope.$watch("treeModel", function updateNodeOnRootScope(newValue) {
if (angular.isArray(newValue)) {
if (angular.isDefined(scope.node) && angular.equals(scope.node[scope.options.nodeChildren], newValue))
return;
scope.node = {};
scope.synteticRoot = scope.node;
scope.node[scope.options.nodeChildren] = newValue;
}
else {
if (angular.equals(scope.node, newValue))
return;
scope.node = newValue;
}
});
scope.$watchCollection('expandedNodes', function(newValue) {
var notFoundIds = 0;
var newExpandedNodesMap = {};
var $liElements = element.find('li');
var existingScopes = [];
// find all nodes visible on the tree and the scope $id of the scopes including them
angular.forEach($liElements, function(liElement) {
var $liElement = angular.element(liElement);
var liScope = $liElement.scope();
existingScopes.push(liScope);
});
// iterate over the newValue, the new expanded nodes, and for each find it in the existingNodesAndScopes
// if found, add the mapping $id -> node into newExpandedNodesMap
// if not found, add the mapping num -> node into newExpandedNodesMap
angular.forEach(newValue, function(newExNode) {
var found = false;
for (var i=0; (i < existingScopes.length) && !found; i++) {
var existingScope = existingScopes[i];
if (scope.options.equality(newExNode, existingScope.node)) {
newExpandedNodesMap[existingScope.$id] = existingScope.node;
found = true;
}
}
if (!found)
newExpandedNodesMap[notFoundIds++] = newExNode;
});
scope.expandedNodesMap = newExpandedNodesMap;
});
// scope.$watch('expandedNodesMap', function(newValue) {
//
// });
//Rendering template for a root node
treemodelCntr.template( scope, function(clone) {
element.html('').append( clone );
});
// save the transclude function from compile (which is not bound to a scope as apposed to the one from link)
// we can fix this to work with the link transclude function with angular 1.2.6. as for angular 1.2.0 we need
// to keep using the compile function
scope.$treeTransclude = childTranscludeFn;
}
}
};
}])
.directive("treeitem", function() {
return {
restrict: 'E',
require: "^treecontrol",
link: function( scope, element, attrs, treemodelCntr) {
// Rendering template for the current node
treemodelCntr.template(scope, function(clone) {
element.html('').append(clone);
});
}
}
})
.directive("treeTransclude", function() {
return {
link: function(scope, element, attrs, controller) {
scope.$parent.nodeIdMap[scope.node.id] = scope.$id;
if (!scope.options.isLeaf(scope.node)) {
angular.forEach(scope.expandedNodesMap, function (node, id) {
if (scope.options.equality(node, scope.node)) {
scope.expandedNodesMap[scope.$id] = scope.node;
scope.expandedNodesMap[id] = undefined;
}
});
}
if (!scope.options.multiSelection && scope.options.equality(scope.node, scope.selectedNode)) {
scope.selectedNode = scope.node;
} else if (scope.options.multiSelection) {
var newSelectedNodes = [];
for (var i = 0; (i < scope.selectedNodes.length); i++) {
if (scope.options.equality(scope.node, scope.selectedNodes[i])) {
newSelectedNodes.push(scope.node);
}
}
scope.selectedNodes = newSelectedNodes;
}
// create a scope for the transclusion, whos parent is the parent of the tree control
scope.transcludeScope = scope.parentScopeOfTree.$new();
scope.transcludeScope.node = scope.node;
scope.transcludeScope.$parentNode = (scope.$parent.node === scope.synteticRoot)?null:scope.$parent.node;
scope.transcludeScope.$index = scope.$index;
scope.transcludeScope.$first = scope.$first;
scope.transcludeScope.$middle = scope.$middle;
scope.transcludeScope.$last = scope.$last;
scope.transcludeScope.$odd = scope.$odd;
scope.transcludeScope.$even = scope.$even;
scope.$on('$destroy', function() {
scope.$parent.visibleNodes.splice(scope.$parent.visibleNodes.indexOf(scope.node), 1);
scope.$parent.nodeIdMap[scope.node.id] = null;
scope.transcludeScope.$destroy();
});
scope.$treeTransclude(scope.transcludeScope, function(clone) {
element.empty();
element.append(clone);
});
var parentIndex = scope.$parent.visibleNodes.indexOf(scope.$parent.node);
if(parentIndex !== -1) {
var myIndex = 1 + scope.transcludeScope.$parentNode[scope.$parent.options.nodeChildren].indexOf(scope.node);
scope.$parent.visibleNodes.splice(parentIndex+myIndex, 0, scope.node);
} else {
scope.$parent.visibleNodes.push(scope.node);
}
}
}
});
})( angular );