devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
1,188 lines • 56 kB
JavaScript
/**
* DevExtreme (esm/ui/tree_view/ui.tree_view.base.js)
* Version: 21.1.4
* Build date: Mon Jun 21 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import $ from "../../core/renderer";
import domAdapter from "../../core/dom_adapter";
import eventsEngine from "../../events/core/events_engine";
import messageLocalization from "../../localization/message";
import {
name as clickEventName
} from "../../events/click";
import {
asyncNoop,
noop
} from "../../core/utils/common";
import {
hasWindow
} from "../../core/utils/window";
import {
isDefined,
isPrimitive,
isFunction,
isString
} from "../../core/utils/type";
import {
extend
} from "../../core/utils/extend";
import {
each
} from "../../core/utils/iterator";
import {
getPublicElement
} from "../../core/element";
import CheckBox from "../check_box";
import HierarchicalCollectionWidget from "../hierarchical_collection/ui.hierarchical_collection_widget";
import {
addNamespace
} from "../../events/utils/index";
import pointerEvents from "../../events/pointer";
import {
name as dblclickEvent
} from "../../events/double_click";
import fx from "../../animation/fx";
import Scrollable from "../scroll_view/ui.scrollable";
import LoadIndicator from "../load_indicator";
import {
fromPromise,
Deferred,
when
} from "../../core/utils/deferred";
import errors from "../widget/ui.errors";
var WIDGET_CLASS = "dx-treeview";
var NODE_CLASS = "".concat(WIDGET_CLASS, "-node");
var NODE_CONTAINER_CLASS = "".concat(NODE_CLASS, "-container");
var NODE_LOAD_INDICATOR_CLASS = "".concat(NODE_CLASS, "-loadindicator");
var OPENED_NODE_CONTAINER_CLASS = "".concat(NODE_CLASS, "-container-opened");
var IS_LEAF = "".concat(NODE_CLASS, "-is-leaf");
var ITEM_CLASS = "".concat(WIDGET_CLASS, "-item");
var ITEM_WITH_CHECKBOX_CLASS = "".concat(ITEM_CLASS, "-with-checkbox");
var ITEM_WITHOUT_CHECKBOX_CLASS = "".concat(ITEM_CLASS, "-without-checkbox");
var ITEM_DATA_KEY = "".concat(ITEM_CLASS, "-data");
var TOGGLE_ITEM_VISIBILITY_CLASS = "".concat(WIDGET_CLASS, "-toggle-item-visibility");
var LOAD_INDICATOR_CLASS = "".concat(WIDGET_CLASS, "-loadindicator");
var LOAD_INDICATOR_WRAPPER_CLASS = "".concat(WIDGET_CLASS, "-loadindicator-wrapper");
var TOGGLE_ITEM_VISIBILITY_OPENED_CLASS = "".concat(WIDGET_CLASS, "-toggle-item-visibility-opened");
var SELECT_ALL_ITEM_CLASS = "".concat(WIDGET_CLASS, "-select-all-item");
var INVISIBLE_STATE_CLASS = "dx-state-invisible";
var DISABLED_STATE_CLASS = "dx-state-disabled";
var SELECTED_ITEM_CLASS = "dx-state-selected";
var EXPAND_EVENT_NAMESPACE = "dxTreeView_expand";
var DATA_ITEM_ID = "data-item-id";
var TreeViewBase = HierarchicalCollectionWidget.inherit({
_supportedKeys: function(e) {
var click = e => {
var $itemElement = $(this.option("focusedElement"));
if (!$itemElement.length) {
return
}
e.target = $itemElement;
e.currentTarget = $itemElement;
this._itemClickHandler(e, $itemElement.children("." + ITEM_CLASS));
var expandEventName = this._getEventNameByOption(this.option("expandEvent"));
var expandByClick = expandEventName === addNamespace(clickEventName, EXPAND_EVENT_NAMESPACE);
if (expandByClick) {
this._expandEventHandler(e)
}
};
var select = e => {
e.preventDefault();
var $focusedElement = $(this.option("focusedElement"));
var checkboxInstance = this._getCheckBoxInstance($focusedElement);
if (!checkboxInstance.option("disabled")) {
var currentState = checkboxInstance.option("value");
this._updateItemSelection(!currentState, $focusedElement.find("." + ITEM_CLASS).get(0), true)
}
};
var toggleExpandedNestedItems = function(state, e) {
if (!this.option("expandAllEnabled")) {
return
}
e.preventDefault();
var $rootElement = $(this.option("focusedElement"));
if (!$rootElement.length) {
return
}
var rootItem = this._getItemData($rootElement.find(".".concat(ITEM_CLASS)));
this._toggleExpandedNestedItems([rootItem], state)
};
return extend(this.callBase(), {
enter: this._showCheckboxes() ? select : click,
space: this._showCheckboxes() ? select : click,
asterisk: toggleExpandedNestedItems.bind(this, true),
minus: toggleExpandedNestedItems.bind(this, false)
})
},
_toggleExpandedNestedItems: function(items, state) {
if (!items) {
return
}
for (var i = 0, len = items.length; i < len; i++) {
var item = items[i];
var node = this._dataAdapter.getNodeByItem(item);
this._toggleExpandedState(node, state);
this._toggleExpandedNestedItems(item.items, state)
}
},
_getNodeElement: function(node, cache) {
var key = this._encodeString(node.internalFields.key);
if (cache) {
if (!cache.$nodeByKey) {
cache.$nodeByKey = {};
this.$element().find(".".concat(NODE_CLASS)).each((function() {
var $node = $(this);
var key = $node.attr(DATA_ITEM_ID);
cache.$nodeByKey[key] = $node
}))
}
return cache.$nodeByKey[key] || $()
}
var element = this.$element().get(0).querySelector("[".concat(DATA_ITEM_ID, '="').concat(key, '"]'));
return $(element)
},
_activeStateUnit: "." + ITEM_CLASS,
_widgetClass: function() {
return WIDGET_CLASS
},
_getDefaultOptions: function() {
var defaultOptions = extend(this.callBase(), {
animationEnabled: true,
dataStructure: "tree",
deferRendering: true,
expandAllEnabled: false,
hasItemsExpr: "hasItems",
selectNodesRecursive: true,
expandNodesRecursive: true,
showCheckBoxesMode: "none",
selectAllText: messageLocalization.format("dxList-selectAll"),
onItemSelectionChanged: null,
onItemExpanded: null,
onItemCollapsed: null,
scrollDirection: "vertical",
virtualModeEnabled: false,
rootValue: 0,
focusStateEnabled: false,
selectionMode: "multiple",
expandEvent: "dblclick",
selectByClick: false,
createChildren: null,
onSelectAllValueChanged: null
});
return extend(true, defaultOptions, {
integrationOptions: {
useDeferUpdateForTemplates: false
}
})
},
_initSelectedItems: noop,
_syncSelectionOptions: asyncNoop,
_fireSelectionChanged: function() {
var selectionChangePromise = this._selectionChangePromise;
when(selectionChangePromise).done(function() {
this._createActionByOption("onSelectionChanged", {
excludeValidators: ["disabled", "readOnly"]
})()
}.bind(this))
},
_createSelectAllValueChangedAction: function() {
this._selectAllValueChangedAction = this._createActionByOption("onSelectAllValueChanged", {
excludeValidators: ["disabled", "readOnly"]
})
},
_fireSelectAllValueChanged: function(value) {
this._selectAllValueChangedAction({
value: value
})
},
_checkBoxModeChange: function(value, previousValue) {
if ("none" === previousValue || "none" === value) {
this.repaint();
return
}
var selectAllExists = this._$selectAllItem && this._$selectAllItem.length;
switch (value) {
case "selectAll":
if (!selectAllExists) {
this._createSelectAllValueChangedAction();
this._renderSelectAllItem()
}
break;
case "normal":
if (selectAllExists) {
this._$selectAllItem.remove();
delete this._$selectAllItem
}
}
},
_removeSelection: function() {
var that = this;
each(this._dataAdapter.getFullData(), (function(_, node) {
if (!that._hasChildren(node)) {
return
}
that._dataAdapter.toggleSelection(node.internalFields.key, false, true)
}))
},
_optionChanged: function(args) {
var {
name: name,
value: value,
previousValue: previousValue
} = args;
switch (name) {
case "selectAllText":
if (this._$selectAllItem) {
this._$selectAllItem.dxCheckBox("instance").option("text", value)
}
break;
case "showCheckBoxesMode":
this._checkBoxModeChange(value, previousValue);
break;
case "scrollDirection":
this._scrollableContainer.option("direction", value);
break;
case "items":
delete this._$selectAllItem;
this.callBase(args);
break;
case "dataSource":
this.callBase(args);
this._initDataAdapter();
this._filter = {};
break;
case "hasItemsExpr":
this._initAccessors();
this.repaint();
break;
case "expandEvent":
this._initExpandEvent();
break;
case "deferRendering":
case "dataStructure":
case "rootValue":
case "createChildren":
case "expandNodesRecursive":
case "onItemSelectionChanged":
case "onItemExpanded":
case "onItemCollapsed":
case "expandAllEnabled":
case "animationEnabled":
case "virtualModeEnabled":
case "selectByClick":
break;
case "selectionMode":
this._initDataAdapter();
this.callBase(args);
break;
case "onSelectAllValueChanged":
this._createSelectAllValueChangedAction();
break;
case "selectNodesRecursive":
this._dataAdapter.setOption("recursiveSelection", args.value);
this.repaint();
break;
default:
this.callBase(args)
}
},
_initDataSource: function() {
if (this._useCustomChildrenLoader()) {
this._loadChildrenByCustomLoader(null).done(function(newItems) {
if (newItems && newItems.length) {
this.option("items", newItems)
}
}.bind(this))
} else {
this.callBase();
this._isVirtualMode() && this._initVirtualMode()
}
},
_initVirtualMode: function() {
var filter = this._filter;
if (!filter.custom) {
filter.custom = this._dataSource.filter()
}
if (!filter.internal) {
filter.internal = [this.option("parentIdExpr"), this.option("rootValue")]
}
},
_useCustomChildrenLoader: function() {
return isFunction(this.option("createChildren")) && this._isDataStructurePlain()
},
_loadChildrenByCustomLoader: function(parentNode) {
var invocationResult = this.option("createChildren").call(this, parentNode);
if (Array.isArray(invocationResult)) {
return (new Deferred).resolve(invocationResult).promise()
}
if (invocationResult && isFunction(invocationResult.then)) {
return fromPromise(invocationResult)
}
return (new Deferred).resolve([]).promise()
},
_combineFilter: function() {
if (!this._filter.custom || !this._filter.custom.length) {
return this._filter.internal
}
return [this._filter.custom, this._filter.internal]
},
_dataSourceLoadErrorHandler: function() {
this._renderEmptyMessage()
},
_init: function() {
this._filter = {};
this.callBase();
this._initStoreChangeHandlers()
},
_dataSourceChangedHandler: function(newItems) {
var items = this.option("items");
if (this._initialized && this._isVirtualMode() && items.length) {
return
}
this.option("items", newItems)
},
_removeTreeViewLoadIndicator: function() {
if (!this._treeViewLoadIndicator) {
return
}
this._treeViewLoadIndicator.remove();
this._treeViewLoadIndicator = null
},
_createTreeViewLoadIndicator: function() {
this._treeViewLoadIndicator = $("<div>").addClass(LOAD_INDICATOR_CLASS);
this._createComponent(this._treeViewLoadIndicator, LoadIndicator, {});
return this._treeViewLoadIndicator
},
_dataSourceLoadingChangedHandler: function(isLoading) {
var resultFilter;
if (this._isVirtualMode()) {
resultFilter = this._combineFilter();
this._dataSource.filter(resultFilter)
}
if (isLoading && !this._dataSource.isLoaded()) {
this.option("items", []);
var $wrapper = $("<div>").addClass(LOAD_INDICATOR_WRAPPER_CLASS);
this._createTreeViewLoadIndicator().appendTo($wrapper);
this.itemsContainer().append($wrapper);
if (this._isVirtualMode() && this._dataSource.filter() !== resultFilter) {
this._dataSource.filter([])
}
} else {
this._removeTreeViewLoadIndicator()
}
},
_initStoreChangeHandlers: function() {
if ("plain" !== this.option("dataStructure")) {
return
}
this._dataSource && this._dataSource.store().on("inserted", newItem => {
this.option().items = this.option("items").concat(newItem);
this._dataAdapter.addItem(newItem);
if (!this._dataAdapter.isFiltered(newItem)) {
return
}
this._updateLevel(this._parentIdGetter(newItem))
}).on("removed", removedKey => {
var node = this._dataAdapter.getNodeByKey(removedKey);
if (isDefined(node)) {
this.option("items")[this._dataAdapter.getIndexByKey(node.internalFields.key)] = 0;
this._markChildrenItemsToRemove(node);
this._removeItems();
this._dataAdapter.removeItem(removedKey);
this._updateLevel(this._parentIdGetter(node))
}
})
},
_markChildrenItemsToRemove: function(node) {
var keys = node.internalFields.childrenKeys;
each(keys, (_, key) => {
this.option("items")[this._dataAdapter.getIndexByKey(key)] = 0;
this._markChildrenItemsToRemove(this._dataAdapter.getNodeByKey(key))
})
},
_removeItems: function() {
var items = extend(true, [], this.option("items"));
var counter = 0;
each(items, (index, item) => {
if (!item) {
this.option("items").splice(index - counter, 1);
counter++
}
})
},
_updateLevel: function(parentId) {
var $container = this._getContainerByParentKey(parentId);
this._renderItems($container, this._dataAdapter.getChildrenNodes(parentId))
},
_getOldContainer: function($itemElement) {
if ($itemElement.length) {
return $itemElement.children(".".concat(NODE_CONTAINER_CLASS))
}
if (this._scrollableContainer) {
return this._scrollableContainer.$content().children()
}
return $()
},
_getContainerByParentKey: function(parentId) {
var node = this._dataAdapter.getNodeByKey(parentId);
var $itemElement = node ? this._getNodeElement(node) : [];
this._getOldContainer($itemElement).remove();
var $container = this._renderNodeContainer($itemElement);
if (this._isRootLevel(parentId)) {
if (!this._scrollableContainer) {
this._renderScrollableContainer()
}
this._scrollableContainer.$content().append($container)
}
return $container
},
_isRootLevel: function(parentId) {
return parentId === this.option("rootValue")
},
_getAccessors: function() {
var accessors = this.callBase();
accessors.push("hasItems");
return accessors
},
_getDataAdapterOptions: function() {
return {
rootValue: this.option("rootValue"),
multipleSelection: !this._isSingleSelection(),
recursiveSelection: this._isRecursiveSelection(),
recursiveExpansion: this.option("expandNodesRecursive"),
selectionRequired: this.option("selectionRequired"),
dataType: this.option("dataStructure"),
sort: this._dataSource && this._dataSource.sort()
}
},
_initMarkup: function() {
this._renderScrollableContainer();
this._renderEmptyMessage(this._dataAdapter.getRootNodes());
this.callBase();
this.setAria("role", "tree")
},
_renderContentImpl: function() {
var $nodeContainer = this._renderNodeContainer();
this._scrollableContainer.$content().append($nodeContainer);
if (!this.option("items") || !this.option("items").length) {
return
}
this._renderItems($nodeContainer, this._dataAdapter.getRootNodes());
this._initExpandEvent();
if (this._selectAllEnabled()) {
this._createSelectAllValueChangedAction();
this._renderSelectAllItem($nodeContainer)
}
},
_isVirtualMode: function() {
return this.option("virtualModeEnabled") && this._isDataStructurePlain() && !!this.option("dataSource")
},
_isDataStructurePlain: function() {
return "plain" === this.option("dataStructure")
},
_fireContentReadyAction: function() {
var dataSource = this.getDataSource();
var skipContentReadyAction = dataSource && !dataSource.isLoaded();
if (this._scrollableContainer && hasWindow()) {
this._scrollableContainer.update()
}
if (!skipContentReadyAction) {
this.callBase()
}
if (this._scrollableContainer && hasWindow()) {
this._scrollableContainer.update()
}
},
_renderScrollableContainer: function() {
this._scrollableContainer = this._createComponent($("<div>").appendTo(this.$element()), Scrollable, {
direction: this.option("scrollDirection"),
useKeyboard: false
})
},
_renderNodeContainer: function($parent) {
var $container = $("<ul>").addClass(NODE_CONTAINER_CLASS);
this.setAria("role", "group", $container);
if ($parent && $parent.length) {
var itemData = this._getItemData($parent.children("." + ITEM_CLASS));
if (this._expandedGetter(itemData)) {
$container.addClass(OPENED_NODE_CONTAINER_CLASS)
}
$container.appendTo($parent)
}
return $container
},
_createDOMElement: function($nodeContainer, node) {
var $node = $("<li>").addClass(NODE_CLASS).attr(DATA_ITEM_ID, this._encodeString(node.internalFields.key)).prependTo($nodeContainer);
this.setAria({
role: "treeitem",
label: this._displayGetter(node.internalFields.item) || "",
expanded: node.internalFields.expanded || false,
level: this._getLevel($nodeContainer)
}, $node);
return $node
},
_getLevel: function($nodeContainer) {
var parent = $nodeContainer.parent();
return parent.hasClass("dx-scrollable-content") ? 1 : parseInt(parent.attr("aria-level")) + 1
},
_showCheckboxes: function() {
return "none" !== this.option("showCheckBoxesMode")
},
_selectAllEnabled: function() {
return "selectAll" === this.option("showCheckBoxesMode") && !this._isSingleSelection()
},
_renderItems: function($nodeContainer, nodes) {
var length = nodes.length - 1;
for (var i = length; i >= 0; i--) {
this._renderItem(i, nodes[i], $nodeContainer)
}
this._renderedItemsCount += nodes.length
},
_renderItem: function(nodeIndex, node, $nodeContainer) {
var $node = this._createDOMElement($nodeContainer, node);
var nodeData = node.internalFields;
var showCheckBox = this._showCheckboxes();
$node.addClass(showCheckBox ? ITEM_WITH_CHECKBOX_CLASS : ITEM_WITHOUT_CHECKBOX_CLASS);
$node.toggleClass(INVISIBLE_STATE_CLASS, false === nodeData.item.visible);
showCheckBox && this._renderCheckBox($node, node);
this.setAria("selected", nodeData.selected, $node);
this._toggleSelectedClass($node, nodeData.selected);
this.callBase(this._renderedItemsCount + nodeIndex, nodeData.item, $node);
if (false !== nodeData.item.visible) {
this._renderChildren($node, node)
}
},
_setAriaSelected: function() {},
_renderChildren: function($node, node) {
if (!this._hasChildren(node)) {
this._addLeafClass($node);
return
}
this._renderToggleItemVisibilityIcon($node, node);
if (this.option("deferRendering") && !node.internalFields.expanded) {
return
}
this._loadSublevel(node).done(childNodes => {
this._renderSublevel($node, this._getActualNode(node), childNodes)
})
},
_getActualNode: function(cachedNode) {
return this._dataAdapter.getNodeByKey(cachedNode.internalFields.key)
},
_hasChildren: function(node) {
if (this._isVirtualMode() || this._useCustomChildrenLoader()) {
return false !== this._hasItemsGetter(node.internalFields.item)
}
return this.callBase(node)
},
_loadSublevel: function(node) {
var deferred = new Deferred;
var childrenNodes = this._getChildNodes(node);
if (childrenNodes.length) {
deferred.resolve(childrenNodes)
} else {
this._loadNestedItems(node).done(items => {
deferred.resolve(this._dataAdapter.getNodesByItems(items))
})
}
return deferred.promise()
},
_renderSublevel: function($node, node, childNodes) {
var $nestedNodeContainer = this._renderNodeContainer($node, node);
var childNodesByChildrenKeys = childNodes.filter(childNode => -1 !== node.internalFields.childrenKeys.indexOf(childNode.internalFields.key));
this._renderItems($nestedNodeContainer, childNodesByChildrenKeys);
if (childNodesByChildrenKeys.length && !node.internalFields.selected) {
var firstChild = childNodesByChildrenKeys[0];
this._updateParentsState(firstChild, this._getNodeElement(firstChild))
}
this._normalizeIconState($node, childNodesByChildrenKeys.length);
if (node.internalFields.expanded) {
$nestedNodeContainer.addClass(OPENED_NODE_CONTAINER_CLASS)
}
},
_executeItemRenderAction: function(itemIndex, itemData, itemElement) {
var node = this._getNode(itemElement);
this._getItemRenderAction()({
itemElement: itemElement,
itemIndex: itemIndex,
itemData: itemData,
node: this._dataAdapter.getPublicNode(node)
})
},
_addLeafClass: function($node) {
$node.addClass(IS_LEAF)
},
_expandEventHandler: function(e) {
var $nodeElement = $(e.currentTarget.parentNode);
if (!$nodeElement.hasClass(IS_LEAF)) {
this._toggleExpandedState(e.currentTarget, void 0, e)
}
},
_initExpandEvent: function() {
var expandedEventName = this._getEventNameByOption(this.option("expandEvent"));
var $itemsContainer = this._itemContainer();
var itemSelector = this._itemSelector();
eventsEngine.off($itemsContainer, "." + EXPAND_EVENT_NAMESPACE, itemSelector);
eventsEngine.on($itemsContainer, expandedEventName, itemSelector, this._expandEventHandler.bind(this))
},
_getEventNameByOption: function(name) {
var event = "click" === name ? clickEventName : dblclickEvent;
return addNamespace(event, EXPAND_EVENT_NAMESPACE)
},
_getNode: function(identifier) {
if (!isDefined(identifier)) {
return null
}
if (identifier.internalFields) {
return identifier
}
if (isPrimitive(identifier)) {
return this._dataAdapter.getNodeByKey(identifier)
}
var itemElement = $(identifier).get(0);
if (!itemElement) {
return null
}
if (domAdapter.isElementNode(itemElement)) {
return this._getNodeByElement(itemElement)
}
return this._dataAdapter.getNodeByItem(itemElement)
},
_getNodeByElement: function(itemElement) {
var $node = $(itemElement).closest("." + NODE_CLASS);
var key = this._decodeString($node.attr(DATA_ITEM_ID));
return this._dataAdapter.getNodeByKey(key)
},
_toggleExpandedState: function(itemElement, state, e) {
var node = this._getNode(itemElement);
if (!node) {
return (new Deferred).reject().promise()
}
if (node.internalFields.disabled) {
return (new Deferred).reject().promise()
}
var currentState = node.internalFields.expanded;
if (currentState === state) {
return (new Deferred).resolve().promise()
}
if (this._hasChildren(node)) {
var $node = this._getNodeElement(node);
if ($node.find(".".concat(NODE_LOAD_INDICATOR_CLASS, ":not(.").concat(INVISIBLE_STATE_CLASS, ")")).length) {
return (new Deferred).reject().promise()
}
this._createLoadIndicator($node)
}
if (!isDefined(state)) {
state = !currentState
}
this._dataAdapter.toggleExpansion(node.internalFields.key, state);
return this._updateExpandedItemsUI(node, state, e)
},
_createLoadIndicator: function($node) {
var $icon = $node.children("." + TOGGLE_ITEM_VISIBILITY_CLASS);
var $nodeContainer = $node.children(".".concat(NODE_CONTAINER_CLASS));
if ($icon.hasClass(TOGGLE_ITEM_VISIBILITY_OPENED_CLASS) || $nodeContainer.not(":empty").length) {
return
}
this._createComponent($("<div>").addClass(NODE_LOAD_INDICATOR_CLASS), LoadIndicator, {}).$element().appendTo($node);
$icon.hide()
},
_renderToggleItemVisibilityIcon: function($node, node) {
var $icon = $("<div>").addClass(TOGGLE_ITEM_VISIBILITY_CLASS).appendTo($node);
if (node.internalFields.expanded) {
$icon.addClass(TOGGLE_ITEM_VISIBILITY_OPENED_CLASS);
$node.parent().addClass(OPENED_NODE_CONTAINER_CLASS)
}
if (node.internalFields.disabled) {
$icon.addClass(DISABLED_STATE_CLASS)
}
this._renderToggleItemVisibilityIconClick($icon, node)
},
_renderToggleItemVisibilityIconClick: function($icon, node) {
var eventName = addNamespace(clickEventName, this.NAME);
eventsEngine.off($icon, eventName);
eventsEngine.on($icon, eventName, e => {
this._toggleExpandedState(node.internalFields.key, void 0, e)
})
},
_updateExpandedItemsUI: function(node, state, e) {
var $node = this._getNodeElement(node);
var isHiddenNode = !$node.length || state && $node.is(":hidden");
if (this.option("expandNodesRecursive") && isHiddenNode) {
var parentNode = this._getNode(node.internalFields.parentKey);
if (parentNode) {
this._updateExpandedItemsUI(parentNode, state, e)
}
}
var $icon = $node.children("." + TOGGLE_ITEM_VISIBILITY_CLASS);
var $nodeContainer = $node.children(".".concat(NODE_CONTAINER_CLASS));
$icon.toggleClass(TOGGLE_ITEM_VISIBILITY_OPENED_CLASS, state);
var nodeContainerExists = $nodeContainer.length > 0;
var completionCallback = new Deferred;
if (!state || nodeContainerExists && !$nodeContainer.is(":empty")) {
this._animateNodeContainer(node, state, e, completionCallback);
return completionCallback.promise()
}
if (0 === node.internalFields.childrenKeys.length && (this._isVirtualMode() || this._useCustomChildrenLoader())) {
this._loadNestedItemsWithUpdate(node, state, e, completionCallback);
return completionCallback.promise()
}
this._renderSublevel($node, node, this._getChildNodes(node));
this._fireContentReadyAction();
this._animateNodeContainer(node, state, e, completionCallback);
return completionCallback.promise()
},
_loadNestedItemsWithUpdate: function(node, state, e, completionCallback) {
var $node = this._getNodeElement(node);
this._loadNestedItems(node).done(items => {
var actualNodeData = this._getActualNode(node);
this._renderSublevel($node, actualNodeData, this._dataAdapter.getNodesByItems(items));
if (!items || !items.length) {
return
}
this._fireContentReadyAction();
this._animateNodeContainer(actualNodeData, state, e, completionCallback)
})
},
_loadNestedItems: function(node) {
if (this._useCustomChildrenLoader()) {
var publicNode = this._dataAdapter.getPublicNode(node);
return this._loadChildrenByCustomLoader(publicNode).done(newItems => {
if (!this._areNodesExists(newItems)) {
this._appendItems(newItems)
}
})
}
if (!this._isVirtualMode()) {
return (new Deferred).resolve([]).promise()
}
this._filter.internal = [this.option("parentIdExpr"), node.internalFields.key];
this._dataSource.filter(this._combineFilter());
return this._dataSource.load().done(newItems => {
if (!this._areNodesExists(newItems)) {
this._appendItems(newItems)
}
})
},
_areNodesExists: function(newItems, items) {
var keyOfRootItem = this.keyOf(newItems[0]);
var fullData = this._dataAdapter.getFullData();
return !!this._dataAdapter.getNodeByKey(keyOfRootItem, fullData)
},
_appendItems: function(newItems) {
this.option().items = this.option("items").concat(newItems);
this._initDataAdapter()
},
_animateNodeContainer: function(node, state, e, completionCallback) {
var $node = this._getNodeElement(node);
var $nodeContainer = $node.children(".".concat(NODE_CONTAINER_CLASS));
if (node && completionCallback && 0 === $nodeContainer.length) {
completionCallback.resolve()
}
$nodeContainer.addClass(OPENED_NODE_CONTAINER_CLASS);
var nodeHeight = $nodeContainer.height();
fx.stop($nodeContainer, true);
fx.animate($nodeContainer, {
type: "custom",
duration: this.option("animationEnabled") ? 400 : 0,
from: {
maxHeight: state ? 0 : nodeHeight
},
to: {
maxHeight: state ? nodeHeight : 0
},
complete: function() {
$nodeContainer.css("maxHeight", "none");
$nodeContainer.toggleClass(OPENED_NODE_CONTAINER_CLASS, state);
this.setAria("expanded", state, $node);
this._scrollableContainer.update();
this._fireExpandedStateUpdatedEvent(state, node, e);
if (completionCallback) {
completionCallback.resolve()
}
}.bind(this)
})
},
_fireExpandedStateUpdatedEvent: function(isExpanded, node, e) {
if (!this._hasChildren(node)) {
return
}
var optionName = isExpanded ? "onItemExpanded" : "onItemCollapsed";
if (isDefined(e)) {
this._itemDXEventHandler(e, optionName, {
node: this._dataAdapter.getPublicNode(node)
})
} else {
var target = this._getNodeElement(node);
this._itemEventHandler(target, optionName, {
event: e,
node: this._dataAdapter.getPublicNode(node)
})
}
},
_normalizeIconState: function($node, hasNewItems) {
var $loadIndicator = $node.find(".".concat(NODE_LOAD_INDICATOR_CLASS));
$loadIndicator.length && LoadIndicator.getInstance($loadIndicator).option("visible", false);
if (hasNewItems) {
var $icon = $node.find("." + TOGGLE_ITEM_VISIBILITY_CLASS);
$icon.show();
return
}
$node.find("." + TOGGLE_ITEM_VISIBILITY_CLASS).removeClass(TOGGLE_ITEM_VISIBILITY_CLASS);
$node.addClass(IS_LEAF)
},
_emptyMessageContainer: function() {
return this._scrollableContainer ? this._scrollableContainer.content() : this.callBase()
},
_renderContent: function() {
var items = this.option("items");
if (items && items.length) {
this._contentAlreadyRendered = true
}
this.callBase()
},
_renderSelectAllItem: function($container) {
$container = $container || this.$element().find(".".concat(NODE_CONTAINER_CLASS)).first();
this._$selectAllItem = $("<div>").addClass(SELECT_ALL_ITEM_CLASS);
var value = this._dataAdapter.isAllSelected();
this._createComponent(this._$selectAllItem, CheckBox, {
value: value,
text: this.option("selectAllText"),
onValueChanged: this._onSelectAllCheckboxValueChanged.bind(this)
});
this._toggleSelectedClass(this._$selectAllItem, value);
$container.before(this._$selectAllItem)
},
_onSelectAllCheckboxValueChanged: function(args) {
this._toggleSelectAll(args);
this._fireSelectAllValueChanged(args.value)
},
_toggleSelectAll: function(args) {
this._dataAdapter.toggleSelectAll(args.value);
this._updateItemsUI();
this._fireSelectionChanged()
},
_renderCheckBox: function($node, node) {
var $checkbox = $("<div>").appendTo($node);
this._createComponent($checkbox, CheckBox, {
value: node.internalFields.selected,
onValueChanged: this._changeCheckboxValue.bind(this),
focusStateEnabled: false,
disabled: this._disabledGetter(node)
})
},
_toggleSelectedClass: function($node, value) {
$node.toggleClass(SELECTED_ITEM_CLASS, !!value)
},
_toggleNodeDisabledState: function(node, state) {
var $node = this._getNodeElement(node);
var $item = $node.find("." + ITEM_CLASS).eq(0);
this._dataAdapter.toggleNodeDisabledState(node.internalFields.key, state);
$item.toggleClass(DISABLED_STATE_CLASS, !!state);
if (this._showCheckboxes()) {
var checkbox = this._getCheckBoxInstance($node);
checkbox.option("disabled", !!state)
}
},
_itemOptionChanged: function(item, property, value) {
var node = this._dataAdapter.getNodeByItem(item);
if (property === this.option("disabledExpr")) {
this._toggleNodeDisabledState(node, value)
}
},
_changeCheckboxValue: function(e) {
var $node = $(e.element).parent("." + NODE_CLASS);
var $item = $node.children("." + ITEM_CLASS);
var item = this._getItemData($item);
var node = this._getNodeByElement($item);
var value = e.value;
if (node && node.internalFields.selected === value) {
return
}
this._updateItemSelection(value, item, e.event)
},
_isSingleSelection: function() {
return "single" === this.option("selectionMode")
},
_isRecursiveSelection: function() {
return this.option("selectNodesRecursive") && "single" !== this.option("selectionMode")
},
_isLastSelectedBranch: function(publicNode, selectedNodesKeys, deep) {
var keyIndex = selectedNodesKeys.indexOf(publicNode.key);
if (keyIndex >= 0) {
selectedNodesKeys.splice(keyIndex, 1)
}
if (deep) {
each(publicNode.children, function(_, childNode) {
this._isLastSelectedBranch(childNode, selectedNodesKeys, true)
}.bind(this))
}
if (publicNode.parent) {
this._isLastSelectedBranch(publicNode.parent, selectedNodesKeys)
}
return 0 === selectedNodesKeys.length
},
_isLastRequired: function(node) {
var selectionRequired = this.option("selectionRequired");
var isSingleMode = this._isSingleSelection();
var selectedNodesKeys = this.getSelectedNodeKeys();
if (!selectionRequired) {
return
}
if (isSingleMode) {
return 1 === selectedNodesKeys.length
} else {
return this._isLastSelectedBranch(node.internalFields.publicNode, selectedNodesKeys.slice(), true)
}
},
_updateItemSelection: function(value, itemElement, dxEvent) {
var node = this._getNode(itemElement);
if (!node || false === node.visible) {
return false
}
if (node.internalFields.selected === value) {
return true
}
if (!value && this._isLastRequired(node)) {
if (this._showCheckboxes()) {
var $node = this._getNodeElement(node);
this._getCheckBoxInstance($node).option("value", true)
}
return false
}
if (value && this._isSingleSelection()) {
var selectedKeys = this.getSelectedNodeKeys();
each(selectedKeys, (index, key) => {
this._dataAdapter.toggleSelection(key, false);
this._updateItemsUI();
this._fireItemSelectionChanged(this._getNode(key))
})
}
this._dataAdapter.toggleSelection(node.internalFields.key, value);
var isAllSelected = this._dataAdapter.isAllSelected();
var needFireSelectAllChanged = this._selectAllEnabled() && this._$selectAllItem.dxCheckBox("instance").option("value") !== isAllSelected;
this._updateItemsUI();
this._fireItemSelectionChanged(node, dxEvent);
this._fireSelectionChanged();
if (needFireSelectAllChanged) {
this._fireSelectAllValueChanged(isAllSelected)
}
return true
},
_fireItemSelectionChanged: function(node, dxEvent) {
var initiator = dxEvent || this._findItemElementByItem(node.internalFields.item);
var handler = dxEvent ? this._itemDXEventHandler : this._itemEventHandler;
handler.call(this, initiator, "onItemSelectionChanged", {
node: this._dataAdapter.getPublicNode(node),
itemData: node.internalFields.item
})
},
_getCheckBoxInstance: function($node) {
return $node.children(".dx-checkbox").dxCheckBox("instance")
},
_updateItemsUI: function() {
var cache = {};
each(this._dataAdapter.getData(), (_, node) => {
var $node = this._getNodeElement(node, cache);
var nodeSelection = node.internalFields.selected;
if (!$node.length) {
return
}
this._toggleSelectedClass($node, nodeSelection);
this.setAria("selected", nodeSelection, $node);
if (this._showCheckboxes()) {
this._getCheckBoxInstance($node).option("value", nodeSelection)
}
});
if (this._selectAllEnabled()) {
var selectAllCheckbox = this._$selectAllItem.dxCheckBox("instance");
selectAllCheckbox.option("onValueChanged", void 0);
selectAllCheckbox.option("value", this._dataAdapter.isAllSelected());
selectAllCheckbox.option("onValueChanged", this._onSelectAllCheckboxValueChanged.bind(this))
}
},
_updateParentsState: function(node, $node) {
if (!$node) {
return
}
var parentNode = this._dataAdapter.getNodeByKey(node.internalFields.parentKey);
var $parentNode = $($node.parents("." + NODE_CLASS)[0]);
if (this._showCheckboxes()) {
var parentValue = parentNode.internalFields.selected;
this._getCheckBoxInstance($parentNode).option("value", parentValue);
this._toggleSelectedClass($parentNode, parentValue)
}
if (parentNode.internalFields.parentKey !== this.option("rootValue")) {
this._updateParentsState(parentNode, $parentNode)
}
},
_itemEventHandlerImpl: function(initiator, action, actionArgs) {
var $itemElement = $(initiator).closest("." + NODE_CLASS).children("." + ITEM_CLASS);
return action(extend(this._extendActionArgs($itemElement), actionArgs))
},
_itemContextMenuHandler: function(e) {
this._createEventHandler("onItemContextMenu", e)
},
_itemHoldHandler: function(e) {
this._createEventHandler("onItemHold", e)
},
_createEventHandler: function(eventName, e) {
var node = this._getNodeByElement(e.currentTarget);
this._itemDXEventHandler(e, eventName, {
node: this._dataAdapter.getPublicNode(node)
})
},
_itemClass: function() {
return ITEM_CLASS
},
_itemDataKey: function() {
return ITEM_DATA_KEY
},
_attachClickEvent: function() {
var clickSelector = "." + this._itemClass();
var pointerDownSelector = "." + NODE_CLASS + ", ." + SELECT_ALL_ITEM_CLASS;
var eventName = addNamespace(clickEventName, this.NAME);
var pointerDownEvent = addNamespace(pointerEvents.down, this.NAME);
var $itemContainer = this._itemContainer();
var that = this;
eventsEngine.off($itemContainer, eventName, clickSelector);
eventsEngine.off($itemContainer, pointerDownEvent, pointerDownSelector);
eventsEngine.on($itemContainer, eventName, clickSelector, (function(e) {
that._itemClickHandler(e, $(this))
}));
eventsEngine.on($itemContainer, pointerDownEvent, pointerDownSelector, (function(e) {
that._itemPointerDownHandler(e)
}))
},
_itemClickHandler: function(e, $item) {
var itemData = this._getItemData($item);
var node = this._getNodeByElement($item);
this._itemDXEventHandler(e, "onItemClick", {
node: this._dataAdapter.getPublicNode(node)
});
if (this.option("selectByClick") && !e.isDefaultPrevented()) {
this._updateItemSelection(!node.internalFields.selected, itemData, e)
}
},
_updateSelectionToFirstItem: function($items, startIndex) {
var itemIndex = startIndex;
while (itemIndex >= 0) {
var $item = $($items[itemIndex]);
this._updateItemSelection(true, $item.find("." + ITEM_CLASS).get(0));
itemIndex--
}
},
_updateSelectionToLastItem: function($items, startIndex) {
var length = $items.length;
var itemIndex = startIndex;
while (itemIndex < length) {
var $item = $($items[itemIndex]);
this._updateItemSelection(true, $item.find("." + ITEM_CLASS).get(0));
itemIndex++
}
},
_focusInHandler: function(e) {
this._updateFocusState(e, true);
if (this.option("focusedElement")) {
clearTimeout(this._setFocusedItemTimeout);
this._setFocusedItemTimeout = setTimeout(() => {
this._setFocusedItem($(this.option("focusedElement")))
});
return
}
var $activeItem = this._getActiveItem();
this.option("focusedElement", getPublicElement($activeItem.closest("." + NODE_CLASS)))
},
_setFocusedItem: function($target) {
if (!$target || !$target.length) {
return
}
if (!$target.children().hasClass(DISABLED_STATE_CLASS)) {
this.callBase($target)
}
},
_itemPointerDownHandler: function(e) {
if (!this.option("focusStateEnabled")) {
return
}
var $target = $(e.target).closest("." + NODE_CLASS + ", ." + SELECT_ALL_ITEM_CLASS);
if (!$target.length) {
return
}
var itemElement = $target.hasClass(DISABLED_STATE_CLASS) ? null : $target;
this.option("focusedElement", getPublicElement(itemElement))
},
_findNonDisabledNodes: function($nodes) {
return $nodes.not((function() {
return $(this).children("." + ITEM_CLASS).hasClass(DISABLED_STATE_CLASS)
}))
},
_moveFocus: function(location, e) {
var FOCUS_UP = "up";
var FOCUS_DOWN = "down";
var FOCUS_FIRST = "first";
var FOCUS_LAST = "last";
var FOCUS_LEFT = this.option("rtlEnabled") ? "right" : "left";
var FOCUS_RIGHT = this.option("rtlEnabled") ? "left" : "right";
this.$element().find(".".concat(NODE_CONTAINER_CLASS)).each((function() {
fx.stop(this, true)
}));
var $items = this._findNonDisabledNodes(this._nodeElements());
if (!$items || !$items.length) {
return
}
switch (location) {
case FOCUS_UP:
var $prevItem = this._prevItem($items);
this.option("focusedElement", getPublicElement($prevItem));
var prevItemElement = this._getNodeItemElement($prevItem);
this._scrollableContainer.scrollToElement(prevItemElement);
if (e.shiftKey && this._showCheckboxes()) {
this._updateItemSelection(true, prevItemElement)
}
break;
case FOCUS_DOWN:
var $nextItem = this._nextItem($items);
this.option("focusedElement", getPublicElement($nextItem));
var nextItemElement = this._getNodeItemElement($nextItem);
this._scrollableContainer.scrollToElement(nextItemElement);
if (e.shiftKey && this._showCheckboxes()) {
this._updateItemSelection(true, nextItemElement)
}
break;
case FOCUS_FIRST:
var $firstItem = $items.first();
if (e.shiftKey && this._showCheckboxes()) {
this._updateSelectionToFirstItem($items, $items.index(this._prevItem($items)))
}
this.option("focusedElement", getPublicElement($firstItem));
this._scrollableContainer.scrollToElement(this._getNodeItemElement($firstItem));
break;
case FOCUS_LAST:
var $lastItem = $items.last();
if (e.shiftKey && this._showCheckboxes()) {
this._updateSelectionToLastItem($items, $items.index(this._nextItem($items)))
}
this.option("focusedElement", getPublicElement($lastItem));
this._scrollableContainer.scrollToElement(this._getNodeItemElement($lastItem));
break;
case FOCUS_RIGHT:
this._expandFocusedContainer();
break;
case FOCUS_LEFT:
this._collapseFocusedContainer();
break;
default:
this.callBase.apply(this, arguments);
return
}
},
_getNodeItemElement: function($node) {
return $node.find("." + ITEM_CLASS).get(0)
},
_nodeElements: function() {
return this.$element().find("." + NODE_CLASS).not(":hidden")
},