primeng/fesm2015/primeng-tree.js

import { Component, ViewEncapsulation, Inject, forwardRef, Input, EventEmitter, ChangeDetectionStrategy, ElementRef, Optional, Output, ContentChildren, ViewChild, NgModule } from '@angular/core';
import { CdkVirtualScrollViewport, ScrollingModule } from '@angular/cdk/scrolling';
import { CommonModule } from '@angular/common';
import { TreeDragDropService, PrimeTemplate, SharedModule } from 'primeng/api';
import { ObjectUtils } from 'primeng/utils';
import { DomHandler } from 'primeng/dom';
import { RippleModule } from 'primeng/ripple';

class UITreeNode {
    constructor(tree) {
        this.tree = tree;
    }
    ngOnInit() {
        this.node.parent = this.parentNode;
        if (this.parentNode) {
            this.tree.syncNodeOption(this.node, this.tree.value, 'parent', this.tree.getNodeWithKey(this.parentNode.key, this.tree.value));
        }
    }
    getIcon() {
        let icon;
        if (this.node.icon)
            icon = this.node.icon;
        else
            icon = this.node.expanded && this.node.children && this.node.children.length ? this.node.expandedIcon : this.node.collapsedIcon;
        return UITreeNode.ICON_CLASS + ' ' + icon;
    }
    isLeaf() {
        return this.tree.isNodeLeaf(this.node);
    }
    toggle(event) {
        if (this.node.expanded)
            this.collapse(event);
        else
            this.expand(event);
    }
    expand(event) {
        this.node.expanded = true;
        if (this.tree.virtualScroll) {
            this.tree.updateSerializedValue();
        }
        this.tree.onNodeExpand.emit({ originalEvent: event, node: this.node });
    }
    collapse(event) {
        this.node.expanded = false;
        if (this.tree.virtualScroll) {
            this.tree.updateSerializedValue();
        }
        this.tree.onNodeCollapse.emit({ originalEvent: event, node: this.node });
    }
    onNodeClick(event) {
        this.tree.onNodeClick(event, this.node);
    }
    onNodeKeydown(event) {
        if (event.which === 13) {
            this.tree.onNodeClick(event, this.node);
        }
    }
    onNodeTouchEnd() {
        this.tree.onNodeTouchEnd();
    }
    onNodeRightClick(event) {
        this.tree.onNodeRightClick(event, this.node);
    }
    isSelected() {
        return this.tree.isSelected(this.node);
    }
    onDropPoint(event, position) {
        event.preventDefault();
        let dragNode = this.tree.dragNode;
        let dragNodeIndex = this.tree.dragNodeIndex;
        let dragNodeScope = this.tree.dragNodeScope;
        let isValidDropPointIndex = this.tree.dragNodeTree === this.tree ? (position === 1 || dragNodeIndex !== this.index - 1) : true;
        if (this.tree.allowDrop(dragNode, this.node, dragNodeScope) && isValidDropPointIndex) {
            let dropParams = Object.assign({}, this.createDropPointEventMetadata(position));
            if (this.tree.validateDrop) {
                this.tree.onNodeDrop.emit({
                    originalEvent: event,
                    dragNode: dragNode,
                    dropNode: this.node,
                    dropIndex: this.index,
                    accept: () => {
                        this.processPointDrop(dropParams);
                    }
                });
            }
            else {
                this.processPointDrop(dropParams);
                this.tree.onNodeDrop.emit({
                    originalEvent: event,
                    dragNode: dragNode,
                    dropNode: this.node,
                    dropIndex: this.index
                });
            }
        }
        this.draghoverPrev = false;
        this.draghoverNext = false;
    }
    processPointDrop(event) {
        let newNodeList = event.dropNode.parent ? event.dropNode.parent.children : this.tree.value;
        event.dragNodeSubNodes.splice(event.dragNodeIndex, 1);
        let dropIndex = this.index;
        if (event.position < 0) {
            dropIndex = (event.dragNodeSubNodes === newNodeList) ? ((event.dragNodeIndex > event.index) ? event.index : event.index - 1) : event.index;
            newNodeList.splice(dropIndex, 0, event.dragNode);
        }
        else {
            dropIndex = newNodeList.length;
            newNodeList.push(event.dragNode);
        }
        this.tree.dragDropService.stopDrag({
            node: event.dragNode,
            subNodes: event.dropNode.parent ? event.dropNode.parent.children : this.tree.value,
            index: event.dragNodeIndex
        });
    }
    createDropPointEventMetadata(position) {
        return {
            dragNode: this.tree.dragNode,
            dragNodeIndex: this.tree.dragNodeIndex,
            dragNodeSubNodes: this.tree.dragNodeSubNodes,
            dropNode: this.node,
            index: this.index,
            position: position
        };
    }
    onDropPointDragOver(event) {
        event.dataTransfer.dropEffect = 'move';
        event.preventDefault();
    }
    onDropPointDragEnter(event, position) {
        if (this.tree.allowDrop(this.tree.dragNode, this.node, this.tree.dragNodeScope)) {
            if (position < 0)
                this.draghoverPrev = true;
            else
                this.draghoverNext = true;
        }
    }
    onDropPointDragLeave(event) {
        this.draghoverPrev = false;
        this.draghoverNext = false;
    }
    onDragStart(event) {
        if (this.tree.draggableNodes && this.node.draggable !== false) {
            event.dataTransfer.setData("text", "data");
            this.tree.dragDropService.startDrag({
                tree: this,
                node: this.node,
                subNodes: this.node.parent ? this.node.parent.children : this.tree.value,
                index: this.index,
                scope: this.tree.draggableScope
            });
        }
        else {
            event.preventDefault();
        }
    }
    onDragStop(event) {
        this.tree.dragDropService.stopDrag({
            node: this.node,
            subNodes: this.node.parent ? this.node.parent.children : this.tree.value,
            index: this.index
        });
    }
    onDropNodeDragOver(event) {
        event.dataTransfer.dropEffect = 'move';
        if (this.tree.droppableNodes) {
            event.preventDefault();
            event.stopPropagation();
        }
    }
    onDropNode(event) {
        if (this.tree.droppableNodes && this.node.droppable !== false) {
            let dragNode = this.tree.dragNode;
            if (this.tree.allowDrop(dragNode, this.node, this.tree.dragNodeScope)) {
                let dropParams = Object.assign({}, this.createDropNodeEventMetadata());
                if (this.tree.validateDrop) {
                    this.tree.onNodeDrop.emit({
                        originalEvent: event,
                        dragNode: dragNode,
                        dropNode: this.node,
                        index: this.index,
                        accept: () => {
                            this.processNodeDrop(dropParams);
                        }
                    });
                }
                else {
                    this.processNodeDrop(dropParams);
                    this.tree.onNodeDrop.emit({
                        originalEvent: event,
                        dragNode: dragNode,
                        dropNode: this.node,
                        index: this.index
                    });
                }
            }
        }
        event.preventDefault();
        event.stopPropagation();
        this.draghoverNode = false;
    }
    createDropNodeEventMetadata() {
        return {
            dragNode: this.tree.dragNode,
            dragNodeIndex: this.tree.dragNodeIndex,
            dragNodeSubNodes: this.tree.dragNodeSubNodes,
            dropNode: this.node
        };
    }
    processNodeDrop(event) {
        let dragNodeIndex = event.dragNodeIndex;
        event.dragNodeSubNodes.splice(dragNodeIndex, 1);
        if (event.dropNode.children)
            event.dropNode.children.push(event.dragNode);
        else
            event.dropNode.children = [event.dragNode];
        this.tree.dragDropService.stopDrag({
            node: event.dragNode,
            subNodes: event.dropNode.parent ? event.dropNode.parent.children : this.tree.value,
            index: dragNodeIndex
        });
    }
    onDropNodeDragEnter(event) {
        if (this.tree.droppableNodes && this.node.droppable !== false && this.tree.allowDrop(this.tree.dragNode, this.node, this.tree.dragNodeScope)) {
            this.draghoverNode = true;
        }
    }
    onDropNodeDragLeave(event) {
        if (this.tree.droppableNodes) {
            let rect = event.currentTarget.getBoundingClientRect();
            if (event.x > rect.left + rect.width || event.x < rect.left || event.y >= Math.floor(rect.top + rect.height) || event.y < rect.top) {
                this.draghoverNode = false;
            }
        }
    }
    onKeyDown(event) {
        const nodeElement = event.target.parentElement.parentElement;
        if (nodeElement.nodeName !== 'P-TREENODE') {
            return;
        }
        switch (event.which) {
            //down arrow
            case 40:
                const listElement = (this.tree.droppableNodes) ? nodeElement.children[1].children[1] : nodeElement.children[0].children[1];
                if (listElement && listElement.children.length > 0) {
                    this.focusNode(listElement.children[0]);
                }
                else {
                    const nextNodeElement = nodeElement.nextElementSibling;
                    if (nextNodeElement) {
                        this.focusNode(nextNodeElement);
                    }
                    else {
                        let nextSiblingAncestor = this.findNextSiblingOfAncestor(nodeElement);
                        if (nextSiblingAncestor) {
                            this.focusNode(nextSiblingAncestor);
                        }
                    }
                }
                event.preventDefault();
                break;
            //up arrow
            case 38:
                if (nodeElement.previousElementSibling) {
                    this.focusNode(this.findLastVisibleDescendant(nodeElement.previousElementSibling));
                }
                else {
                    let parentNodeElement = this.getParentNodeElement(nodeElement);
                    if (parentNodeElement) {
                        this.focusNode(parentNodeElement);
                    }
                }
                event.preventDefault();
                break;
            //right arrow
            case 39:
                if (!this.node.expanded && !this.tree.isNodeLeaf(this.node)) {
                    this.expand(event);
                }
                event.preventDefault();
                break;
            //left arrow
            case 37:
                if (this.node.expanded) {
                    this.collapse(event);
                }
                else {
                    let parentNodeElement = this.getParentNodeElement(nodeElement);
                    if (parentNodeElement) {
                        this.focusNode(parentNodeElement);
                    }
                }
                event.preventDefault();
                break;
            //enter
            case 13:
                this.tree.onNodeClick(event, this.node);
                event.preventDefault();
                break;
            default:
                //no op
                break;
        }
    }
    findNextSiblingOfAncestor(nodeElement) {
        let parentNodeElement = this.getParentNodeElement(nodeElement);
        if (parentNodeElement) {
            if (parentNodeElement.nextElementSibling)
                return parentNodeElement.nextElementSibling;
            else
                return this.findNextSiblingOfAncestor(parentNodeElement);
        }
        else {
            return null;
        }
    }
    findLastVisibleDescendant(nodeElement) {
        const listElement = Array.from(nodeElement.children).find(el => DomHandler.hasClass(el, 'p-treenode'));
        const childrenListElement = listElement.children[1];
        if (childrenListElement && childrenListElement.children.length > 0) {
            const lastChildElement = childrenListElement.children[childrenListElement.children.length - 1];
            return this.findLastVisibleDescendant(lastChildElement);
        }
        else {
            return nodeElement;
        }
    }
    getParentNodeElement(nodeElement) {
        const parentNodeElement = nodeElement.parentElement.parentElement.parentElement;
        return parentNodeElement.tagName === 'P-TREENODE' ? parentNodeElement : null;
    }
    focusNode(element) {
        if (this.tree.droppableNodes)
            element.children[1].children[0].focus();
        else
            element.children[0].children[0].focus();
    }
}
UITreeNode.ICON_CLASS = 'p-treenode-icon ';
UITreeNode.decorators = [
    { type: Component, args: [{
                selector: 'p-treeNode',
                template: `
        <ng-template [ngIf]="node">
            <li *ngIf="tree.droppableNodes" class="p-treenode-droppoint" [ngClass]="{'p-treenode-droppoint-active':draghoverPrev}"
            (drop)="onDropPoint($event,-1)" (dragover)="onDropPointDragOver($event)" (dragenter)="onDropPointDragEnter($event,-1)" (dragleave)="onDropPointDragLeave($event)"></li>
            <li *ngIf="!tree.horizontal" role="treeitem" [ngClass]="['p-treenode',node.styleClass||'', isLeaf() ? 'p-treenode-leaf': '']">
                <div class="p-treenode-content" (click)="onNodeClick($event)" (contextmenu)="onNodeRightClick($event)" (touchend)="onNodeTouchEnd()"
                    (drop)="onDropNode($event)" (dragover)="onDropNodeDragOver($event)" (dragenter)="onDropNodeDragEnter($event)" (dragleave)="onDropNodeDragLeave($event)"
                    [draggable]="tree.draggableNodes" (dragstart)="onDragStart($event)" (dragend)="onDragStop($event)" [attr.tabindex]="0"
                    [ngClass]="{'p-treenode-selectable':tree.selectionMode && node.selectable !== false,'p-treenode-dragover':draghoverNode, 'p-highlight':isSelected()}"
                    (keydown)="onKeyDown($event)" [attr.aria-posinset]="this.index + 1" [attr.aria-expanded]="this.node.expanded" [attr.aria-selected]="isSelected()" [attr.aria-label]="node.label">
                    <button type="button" class="p-tree-toggler p-link" (click)="toggle($event)" pRipple>
                        <span class="p-tree-toggler-icon pi pi-fw" [ngClass]="{'pi-chevron-right':!node.expanded,'pi-chevron-down':node.expanded}"></span>
                    </button>
                    <div class="p-checkbox p-component" *ngIf="tree.selectionMode == 'checkbox'" [attr.aria-checked]="isSelected()">
                        <div class="p-checkbox-box" [ngClass]="{'p-highlight': isSelected(), 'p-indeterminate': node.partialSelected}">
                            <span class="p-checkbox-icon pi" [ngClass]="{'pi-check':isSelected(),'pi-minus':node.partialSelected}"></span>
                        </div>
                    </div>
                    <span [class]="getIcon()" *ngIf="node.icon||node.expandedIcon||node.collapsedIcon"></span>
                    <span class="p-treenode-label">
                            <span *ngIf="!tree.getTemplateForNode(node)">{{node.label}}</span>
                            <span *ngIf="tree.getTemplateForNode(node)">
                                <ng-container *ngTemplateOutlet="tree.getTemplateForNode(node); context: {$implicit: node}"></ng-container>
                            </span>
                    </span>
                </div>
                <ul class="p-treenode-children" style="display: none;" *ngIf="!tree.virtualScroll && node.children && node.expanded" [style.display]="node.expanded ? 'block' : 'none'" role="group">
                    <p-treeNode *ngFor="let childNode of node.children;let firstChild=first;let lastChild=last; let index=index; trackBy: tree.trackBy" [node]="childNode" [parentNode]="node"
                        [firstChild]="firstChild" [lastChild]="lastChild" [index]="index" [style.height.px]="tree.virtualNodeHeight" [level]="level + 1"></p-treeNode>
                </ul>
            </li>
            <li *ngIf="tree.droppableNodes&&lastChild" class="p-treenode-droppoint" [ngClass]="{'p-treenode-droppoint-active':draghoverNext}"
            (drop)="onDropPoint($event,1)" (dragover)="onDropPointDragOver($event)" (dragenter)="onDropPointDragEnter($event,1)" (dragleave)="onDropPointDragLeave($event)"></li>
            <table *ngIf="tree.horizontal" [class]="node.styleClass">
                <tbody>
                    <tr>
                        <td class="p-treenode-connector" *ngIf="!root">
                            <table class="p-treenode-connector-table">
                                <tbody>
                                    <tr>
                                        <td [ngClass]="{'p-treenode-connector-line':!firstChild}"></td>
                                    </tr>
                                    <tr>
                                        <td [ngClass]="{'p-treenode-connector-line':!lastChild}"></td>
                                    </tr>
                                </tbody>
                            </table>
                        </td>
                        <td class="p-treenode" [ngClass]="{'p-treenode-collapsed':!node.expanded}">
                            <div class="p-treenode-content" tabindex="0" [ngClass]="{'p-treenode-selectable':tree.selectionMode,'p-highlight':isSelected()}" (click)="onNodeClick($event)" (contextmenu)="onNodeRightClick($event)"
                                (touchend)="onNodeTouchEnd()" (keydown)="onNodeKeydown($event)">
                                <span class="p-tree-toggler pi pi-fw" [ngClass]="{'pi-plus':!node.expanded,'pi-minus':node.expanded}" *ngIf="!isLeaf()" (click)="toggle($event)"></span>
                                <span [class]="getIcon()" *ngIf="node.icon||node.expandedIcon||node.collapsedIcon"></span>
                                <span class="p-treenode-label">
                                    <span *ngIf="!tree.getTemplateForNode(node)">{{node.label}}</span>
                                    <span *ngIf="tree.getTemplateForNode(node)">
                                        <ng-container *ngTemplateOutlet="tree.getTemplateForNode(node); context: {$implicit: node}"></ng-container>
                                    </span>
                                </span>
                            </div>
                        </td>
                        <td class="p-treenode-children-container" *ngIf="node.children && node.expanded" [style.display]="node.expanded ? 'table-cell' : 'none'">
                            <div class="p-treenode-children">
                                <p-treeNode *ngFor="let childNode of node.children;let firstChild=first;let lastChild=last; trackBy: tree.trackBy" [node]="childNode"
                                        [firstChild]="firstChild" [lastChild]="lastChild"></p-treeNode>
                            </div>
                        </td>
                    </tr>
                </tbody>
            </table>
        </ng-template>
    `,
                encapsulation: ViewEncapsulation.None
            },] }
];
UITreeNode.ctorParameters = () => [
    { type: undefined, decorators: [{ type: Inject, args: [forwardRef(() => Tree),] }] }
];
UITreeNode.propDecorators = {
    rowNode: [{ type: Input }],
    node: [{ type: Input }],
    parentNode: [{ type: Input }],
    root: [{ type: Input }],
    index: [{ type: Input }],
    firstChild: [{ type: Input }],
    lastChild: [{ type: Input }],
    level: [{ type: Input }]
};
class Tree {
    constructor(el, dragDropService) {
        this.el = el;
        this.dragDropService = dragDropService;
        this.selectionChange = new EventEmitter();
        this.onNodeSelect = new EventEmitter();
        this.onNodeUnselect = new EventEmitter();
        this.onNodeExpand = new EventEmitter();
        this.onNodeCollapse = new EventEmitter();
        this.onNodeContextMenuSelect = new EventEmitter();
        this.onNodeDrop = new EventEmitter();
        this.layout = 'vertical';
        this.metaKeySelection = true;
        this.propagateSelectionUp = true;
        this.propagateSelectionDown = true;
        this.loadingIcon = 'pi pi-spinner';
        this.emptyMessage = 'No records found';
        this.filterBy = 'label';
        this.filterMode = 'lenient';
        this.trackBy = (index, item) => item;
        this.onFilter = new EventEmitter();
    }
    ngOnInit() {
        if (this.droppableNodes) {
            this.dragStartSubscription = this.dragDropService.dragStart$.subscribe(event => {
                this.dragNodeTree = event.tree;
                this.dragNode = event.node;
                this.dragNodeSubNodes = event.subNodes;
                this.dragNodeIndex = event.index;
                this.dragNodeScope = event.scope;
            });
            this.dragStopSubscription = this.dragDropService.dragStop$.subscribe(event => {
                this.dragNodeTree = null;
                this.dragNode = null;
                this.dragNodeSubNodes = null;
                this.dragNodeIndex = null;
                this.dragNodeScope = null;
                this.dragHover = false;
            });
        }
    }
    ngOnChanges(simpleChange) {
        if (simpleChange.value) {
            this.updateSerializedValue();
        }
        if (simpleChange.scrollHeight && this.virtualScrollBody) {
            this.virtualScrollBody.checkViewportSize();
        }
    }
    get horizontal() {
        return this.layout == 'horizontal';
    }
    ngAfterContentInit() {
        if (this.templates.length) {
            this.templateMap = {};
        }
        this.templates.forEach((item) => {
            this.templateMap[item.name] = item.template;
        });
    }
    updateSerializedValue() {
        this.serializedValue = [];
        this.serializeNodes(null, this.getRootNode(), 0, true);
    }
    serializeNodes(parent, nodes, level, visible) {
        if (nodes && nodes.length) {
            for (let node of nodes) {
                node.parent = parent;
                const rowNode = {
                    node: node,
                    parent: parent,
                    level: level,
                    visible: visible && (parent ? parent.expanded : true)
                };
                this.serializedValue.push(rowNode);
                if (rowNode.visible && node.expanded) {
                    this.serializeNodes(node, node.children, level + 1, rowNode.visible);
                }
            }
        }
    }
    onNodeClick(event, node) {
        let eventTarget = event.target;
        if (DomHandler.hasClass(eventTarget, 'p-tree-toggler') || DomHandler.hasClass(eventTarget, 'p-tree-toggler-icon')) {
            return;
        }
        else if (this.selectionMode) {
            if (node.selectable === false) {
                return;
            }
            if (this.hasFilteredNodes()) {
                node = this.getNodeWithKey(node.key, this.value);
                if (!node) {
                    return;
                }
            }
            let index = this.findIndexInSelection(node);
            let selected = (index >= 0);
            if (this.isCheckboxSelectionMode()) {
                if (selected) {
                    if (this.propagateSelectionDown)
                        this.propagateDown(node, false);
                    else
                        this.selection = this.selection.filter((val, i) => i != index);
                    if (this.propagateSelectionUp && node.parent) {
                        this.propagateUp(node.parent, false);
                    }
                    this.selectionChange.emit(this.selection);
                    this.onNodeUnselect.emit({ originalEvent: event, node: node });
                }
                else {
                    if (this.propagateSelectionDown)
                        this.propagateDown(node, true);
                    else
                        this.selection = [...this.selection || [], node];
                    if (this.propagateSelectionUp && node.parent) {
                        this.propagateUp(node.parent, true);
                    }
                    this.selectionChange.emit(this.selection);
                    this.onNodeSelect.emit({ originalEvent: event, node: node });
                }
            }
            else {
                let metaSelection = this.nodeTouched ? false : this.metaKeySelection;
                if (metaSelection) {
                    let metaKey = (event.metaKey || event.ctrlKey);
                    if (selected && metaKey) {
                        if (this.isSingleSelectionMode()) {
                            this.selectionChange.emit(null);
                        }
                        else {
                            this.selection = this.selection.filter((val, i) => i != index);
                            this.selectionChange.emit(this.selection);
                        }
                        this.onNodeUnselect.emit({ originalEvent: event, node: node });
                    }
                    else {
                        if (this.isSingleSelectionMode()) {
                            this.selectionChange.emit(node);
                        }
                        else if (this.isMultipleSelectionMode()) {
                            this.selection = (!metaKey) ? [] : this.selection || [];
                            this.selection = [...this.selection, node];
                            this.selectionChange.emit(this.selection);
                        }
                        this.onNodeSelect.emit({ originalEvent: event, node: node });
                    }
                }
                else {
                    if (this.isSingleSelectionMode()) {
                        if (selected) {
                            this.selection = null;
                            this.onNodeUnselect.emit({ originalEvent: event, node: node });
                        }
                        else {
                            this.selection = node;
                            this.onNodeSelect.emit({ originalEvent: event, node: node });
                        }
                    }
                    else {
                        if (selected) {
                            this.selection = this.selection.filter((val, i) => i != index);
                            this.onNodeUnselect.emit({ originalEvent: event, node: node });
                        }
                        else {
                            this.selection = [...this.selection || [], node];
                            this.onNodeSelect.emit({ originalEvent: event, node: node });
                        }
                    }
                    this.selectionChange.emit(this.selection);
                }
            }
        }
        this.nodeTouched = false;
    }
    onNodeTouchEnd() {
        this.nodeTouched = true;
    }
    onNodeRightClick(event, node) {
        if (this.contextMenu) {
            let eventTarget = event.target;
            if (eventTarget.className && eventTarget.className.indexOf('p-tree-toggler') === 0) {
                return;
            }
            else {
                let index = this.findIndexInSelection(node);
                let selected = (index >= 0);
                if (!selected) {
                    if (this.isSingleSelectionMode())
                        this.selectionChange.emit(node);
                    else
                        this.selectionChange.emit([node]);
                }
                this.contextMenu.show(event);
                this.onNodeContextMenuSelect.emit({ originalEvent: event, node: node });
            }
        }
    }
    findIndexInSelection(node) {
        let index = -1;
        if (this.selectionMode && this.selection) {
            if (this.isSingleSelectionMode()) {
                let areNodesEqual = (this.selection.key && this.selection.key === node.key) || this.selection == node;
                index = areNodesEqual ? 0 : -1;
            }
            else {
                for (let i = 0; i < this.selection.length; i++) {
                    let selectedNode = this.selection[i];
                    let areNodesEqual = (selectedNode.key && selectedNode.key === node.key) || selectedNode == node;
                    if (areNodesEqual) {
                        index = i;
                        break;
                    }
                }
            }
        }
        return index;
    }
    syncNodeOption(node, parentNodes, option, value) {
        // to synchronize the node option between the filtered nodes and the original nodes(this.value)
        const _node = this.hasFilteredNodes() ? this.getNodeWithKey(node.key, parentNodes) : null;
        if (_node) {
            _node[option] = value || node[option];
        }
    }
    hasFilteredNodes() {
        return this.filter && this.filteredNodes && this.filteredNodes.length;
    }
    getNodeWithKey(key, nodes) {
        for (let node of nodes) {
            if (node.key === key) {
                return node;
            }
            if (node.children) {
                let matchedNode = this.getNodeWithKey(key, node.children);
                if (matchedNode) {
                    return matchedNode;
                }
            }
        }
    }
    propagateUp(node, select) {
        if (node.children && node.children.length) {
            let selectedCount = 0;
            let childPartialSelected = false;
            for (let child of node.children) {
                if (this.isSelected(child)) {
                    selectedCount++;
                }
                else if (child.partialSelected) {
                    childPartialSelected = true;
                }
            }
            if (select && selectedCount == node.children.length) {
                this.selection = [...this.selection || [], node];
                node.partialSelected = false;
            }
            else {
                if (!select) {
                    let index = this.findIndexInSelection(node);
                    if (index >= 0) {
                        this.selection = this.selection.filter((val, i) => i != index);
                    }
                }
                if (childPartialSelected || selectedCount > 0 && selectedCount != node.children.length)
                    node.partialSelected = true;
                else
                    node.partialSelected = false;
            }
            this.syncNodeOption(node, this.filteredNodes, 'partialSelected');
        }
        let parent = node.parent;
        if (parent) {
            this.propagateUp(parent, select);
        }
    }
    propagateDown(node, select) {
        let index = this.findIndexInSelection(node);
        if (select && index == -1) {
            this.selection = [...this.selection || [], node];
        }
        else if (!select && index > -1) {
            this.selection = this.selection.filter((val, i) => i != index);
        }
        node.partialSelected = false;
        this.syncNodeOption(node, this.filteredNodes, 'partialSelected');
        if (node.children && node.children.length) {
            for (let child of node.children) {
                this.propagateDown(child, select);
            }
        }
    }
    isSelected(node) {
        return this.findIndexInSelection(node) != -1;
    }
    isSingleSelectionMode() {
        return this.selectionMode && this.selectionMode == 'single';
    }
    isMultipleSelectionMode() {
        return this.selectionMode && this.selectionMode == 'multiple';
    }
    isCheckboxSelectionMode() {
        return this.selectionMode && this.selectionMode == 'checkbox';
    }
    isNodeLeaf(node) {
        return node.leaf == false ? false : !(node.children && node.children.length);
    }
    getRootNode() {
        return this.filteredNodes ? this.filteredNodes : this.value;
    }
    getTemplateForNode(node) {
        if (this.templateMap)
            return node.type ? this.templateMap[node.type] : this.templateMap['default'];
        else
            return null;
    }
    onDragOver(event) {
        if (this.droppableNodes && (!this.value || this.value.length === 0)) {
            event.dataTransfer.dropEffect = 'move';
            event.preventDefault();
        }
    }
    onDrop(event) {
        if (this.droppableNodes && (!this.value || this.value.length === 0)) {
            event.preventDefault();
            let dragNode = this.dragNode;
            if (this.allowDrop(dragNode, null, this.dragNodeScope)) {
                let dragNodeIndex = this.dragNodeIndex;
                this.dragNodeSubNodes.splice(dragNodeIndex, 1);
                this.value = this.value || [];
                this.value.push(dragNode);
                this.dragDropService.stopDrag({
                    node: dragNode
                });
            }
        }
    }
    onDragEnter(event) {
        if (this.droppableNodes && this.allowDrop(this.dragNode, null, this.dragNodeScope)) {
            this.dragHover = true;
        }
    }
    onDragLeave(event) {
        if (this.droppableNodes) {
            let rect = event.currentTarget.getBoundingClientRect();
            if (event.x > rect.left + rect.width || event.x < rect.left || event.y > rect.top + rect.height || event.y < rect.top) {
                this.dragHover = false;
            }
        }
    }
    allowDrop(dragNode, dropNode, dragNodeScope) {
        if (!dragNode) {
            //prevent random html elements to be dragged
            return false;
        }
        else if (this.isValidDragScope(dragNodeScope)) {
            let allow = true;
            if (dropNode) {
                if (dragNode === dropNode) {
                    allow = false;
                }
                else {
                    let parent = dropNode.parent;
                    while (parent != null) {
                        if (parent === dragNode) {
                            allow = false;
                            break;
                        }
                        parent = parent.parent;
                    }
                }
            }
            return allow;
        }
        else {
            return false;
        }
    }
    isValidDragScope(dragScope) {
        let dropScope = this.droppableScope;
        if (dropScope) {
            if (typeof dropScope === 'string') {
                if (typeof dragScope === 'string')
                    return dropScope === dragScope;
                else if (dragScope instanceof Array)
                    return dragScope.indexOf(dropScope) != -1;
            }
            else if (dropScope instanceof Array) {
                if (typeof dragScope === 'string') {
                    return dropScope.indexOf(dragScope) != -1;
                }
                else if (dragScope instanceof Array) {
                    for (let s of dropScope) {
                        for (let ds of dragScope) {
                            if (s === ds) {
                                return true;
                            }
                        }
                    }
                }
            }
            return false;
        }
        else {
            return true;
        }
    }
    _filter(event) {
        let filterValue = event.target.value;
        if (filterValue === '') {
            this.filteredNodes = null;
        }
        else {
            this.filteredNodes = [];
            const searchFields = this.filterBy.split(',');
            const filterText = ObjectUtils.removeAccents(filterValue).toLocaleLowerCase(this.filterLocale);
            const isStrictMode = this.filterMode === 'strict';
            for (let node of this.value) {
                let copyNode = Object.assign({}, node);
                let paramsWithoutNode = { searchFields, filterText, isStrictMode };
                if ((isStrictMode && (this.findFilteredNodes(copyNode, paramsWithoutNode) || this.isFilterMatched(copyNode, paramsWithoutNode))) ||
                    (!isStrictMode && (this.isFilterMatched(copyNode, paramsWithoutNode) || this.findFilteredNodes(copyNode, paramsWithoutNode)))) {
                    this.filteredNodes.push(copyNode);
                }
            }
        }
        this.updateSerializedValue();
        this.onFilter.emit({
            filter: filterValue,
            filteredValue: this.filteredNodes
        });
    }
    findFilteredNodes(node, paramsWithoutNode) {
        if (node) {
            let matched = false;
            if (node.children) {
                let childNodes = [...node.children];
                node.children = [];
                for (let childNode of childNodes) {
                    let copyChildNode = Object.assign({}, childNode);
                    if (this.isFilterMatched(copyChildNode, paramsWithoutNode)) {
                        matched = true;
                        node.children.push(copyChildNode);
                    }
                }
            }
            if (matched) {
                node.expanded = true;
                return true;
            }
        }
    }
    isFilterMatched(node, { searchFields, filterText, isStrictMode }) {
        let matched = false;
        for (let field of searchFields) {
            let fieldValue = ObjectUtils.removeAccents(String(ObjectUtils.resolveFieldData(node, field))).toLocaleLowerCase(this.filterLocale);
            if (fieldValue.indexOf(filterText) > -1) {
                matched = true;
            }
        }
        if (!matched || (isStrictMode && !this.isNodeLeaf(node))) {
            matched = this.findFilteredNodes(node, { searchFields, filterText, isStrictMode }) || matched;
        }
        return matched;
    }
    getBlockableElement() {
        return this.el.nativeElement.children[0];
    }
    ngOnDestroy() {
        if (this.dragStartSubscription) {
            this.dragStartSubscription.unsubscribe();
        }
        if (this.dragStopSubscription) {
            this.dragStopSubscription.unsubscribe();
        }
    }
}
Tree.decorators = [
    { type: Component, args: [{
                selector: 'p-tree',
                template: `
        <div [ngClass]="{'p-tree p-component':true,'p-tree-selectable':selectionMode,
                'p-treenode-dragover':dragHover,'p-tree-loading': loading, 'p-tree-flex-scrollable': scrollHeight === 'flex'}" 
            [ngStyle]="style" [class]="styleClass" *ngIf="!horizontal"
            (drop)="onDrop($event)" (dragover)="onDragOver($event)" (dragenter)="onDragEnter($event)" (dragleave)="onDragLeave($event)">
            <div class="p-tree-loading-overlay p-component-overlay" *ngIf="loading">
                <i [class]="'p-tree-loading-icon pi-spin ' + loadingIcon"></i>
            </div>
            <div *ngIf="filter" class="p-tree-filter-container">
                <input #filter type="text" autocomplete="off" class="p-tree-filter p-inputtext p-component" [attr.placeholder]="filterPlaceholder"
                    (keydown.enter)="$event.preventDefault()" (input)="_filter($event)">
                    <span class="p-tree-filter-icon pi pi-search"></span>
            </div>
            <ng-container *ngIf="!virtualScroll; else virtualScrollList">
                <div class="p-tree-wrapper" [style.max-height]="scrollHeight">
                    <ul class="p-tree-container" *ngIf="getRootNode()" role="tree" [attr.aria-label]="ariaLabel" [attr.aria-labelledby]="ariaLabelledBy">
                        <p-treeNode *ngFor="let node of getRootNode(); let firstChild=first;let lastChild=last; let index=index; trackBy: trackBy" [node]="node"
                                    [firstChild]="firstChild" [lastChild]="lastChild" [index]="index" [level]="0"></p-treeNode>
                    </ul>
                </div>
            </ng-container>
            <ng-template #virtualScrollList>
                <cdk-virtual-scroll-viewport class="p-tree-wrapper" [style.height]="scrollHeight" [itemSize]="virtualNodeHeight" [minBufferPx]="minBufferPx" [maxBufferPx]="maxBufferPx">
                    <ul class="p-tree-container" *ngIf="getRootNode()" role="tree" [attr.aria-label]="ariaLabel" [attr.aria-labelledby]="ariaLabelledBy">
                        <p-treeNode *cdkVirtualFor="let rowNode of serializedValue; let firstChild=first; let lastChild=last; let index=index; trackBy: trackBy; templateCacheSize: 0"  [level]="rowNode.level"
                                    [rowNode]="rowNode" [node]="rowNode.node" [firstChild]="firstChild" [lastChild]="lastChild" [index]="index" [style.height.px]="virtualNodeHeight"></p-treeNode>
                    </ul>
                </cdk-virtual-scroll-viewport>
            </ng-template>
            <div class="p-tree-empty-message" *ngIf="!loading && (value == null || value.length === 0)">{{emptyMessage}}</div>
        </div>
        <div [ngClass]="{'p-tree p-tree-horizontal p-component':true,'p-tree-selectable':selectionMode}"  [ngStyle]="style" [class]="styleClass" *ngIf="horizontal">
            <div class="p-tree-loading-mask p-component-overlay" *ngIf="loading">
                <i [class]="'p-tree-loading-icon pi-spin ' + loadingIcon"></i>
            </div>
            <table *ngIf="value&&value[0]">
                <p-treeNode [node]="value[0]" [root]="true"></p-treeNode>
            </table>
            <div class="p-tree-empty-message" *ngIf="!loading && (value == null || value.length === 0)">{{emptyMessage}}</div>
        </div>
    `,
                changeDetection: ChangeDetectionStrategy.Default,
                encapsulation: ViewEncapsulation.None,
                styles: [".p-tree-container{overflow:auto}.p-tree-container,.p-treenode-children{list-style-type:none;margin:0;padding:0}.p-tree-wrapper{overflow:auto}.p-tree-toggler,.p-treenode-selectable{-moz-user-select:none;-ms-user-select:none;-webkit-user-select:none;cursor:pointer;user-select:none}.p-tree-toggler{-ms-flex-align:center;-ms-flex-pack:center;align-items:center;display:-ms-inline-flexbox;display:inline-flex;justify-content:center;overflow:hidden;position:relative}.p-treenode-leaf>.p-treenode-content .p-tree-toggler{visibility:hidden}.p-treenode-content{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex}.p-tree-filter{width:100%}.p-tree-filter-container{display:block;position:relative;width:100%}.p-tree-filter-icon{margin-top:-.5rem;position:absolute;top:50%}.p-tree-loading{min-height:4rem;position:relative}.p-tree .p-tree-loading-overlay{-ms-flex-align:center;-ms-flex-pack:center;align-items:center;display:-ms-flexbox;display:flex;justify-content:center;position:absolute;z-index:2}.p-tree-flex-scrollable{-ms-flex:1;-ms-flex-direction:column;display:-ms-flexbox;display:flex;flex:1;flex-direction:column;height:100%}.p-tree-flex-scrollable .p-tree-wrapper{-ms-flex:1;flex:1}.p-tree .p-treenode-droppoint{height:4px;list-style-type:none}.p-tree .p-treenode-droppoint-active{border:0}.p-tree-horizontal{overflow:auto;padding-left:0;padding-right:0;width:auto}.p-tree.p-tree-horizontal table,.p-tree.p-tree-horizontal td,.p-tree.p-tree-horizontal tr{border-collapse:collapse;margin:0;padding:0;vertical-align:middle}.p-tree-horizontal .p-treenode-content{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;font-weight:400;padding:.4em 1em .4em .2em}.p-tree-horizontal .p-treenode-parent .p-treenode-content{font-weight:400;white-space:nowrap}.p-tree.p-tree-horizontal 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            },] }
];
Tree.ctorParameters = () => [
    { type: ElementRef },
    { type: TreeDragDropService, decorators: [{ type: Optional }] }
];
Tree.propDecorators = {
    value: [{ type: Input }],
    selectionMode: [{ type: Input }],
    selection: [{ type: Input }],
    selectionChange: [{ type: Output }],
    onNodeSelect: [{ type: Output }],
    onNodeUnselect: [{ type: Output }],
    onNodeExpand: [{ type: Output }],
    onNodeCollapse: [{ type: Output }],
    onNodeContextMenuSelect: [{ type: Output }],
    onNodeDrop: [{ type: Output }],
    style: [{ type: Input }],
    styleClass: [{ type: Input }],
    contextMenu: [{ type: Input }],
    layout: [{ type: Input }],
    draggableScope: [{ type: Input }],
    droppableScope: [{ type: Input }],
    draggableNodes: [{ type: Input }],
    droppableNodes: [{ type: Input }],
    metaKeySelection: [{ type: Input }],
    propagateSelectionUp: [{ type: Input }],
    propagateSelectionDown: [{ type: Input }],
    loading: [{ type: Input }],
    loadingIcon: [{ type: Input }],
    emptyMessage: [{ type: Input }],
    ariaLabel: [{ type: Input }],
    ariaLabelledBy: [{ type: Input }],
    validateDrop: [{ type: Input }],
    filter: [{ type: Input }],
    filterBy: [{ type: Input }],
    filterMode: [{ type: Input }],
    filterPlaceholder: [{ type: Input }],
    filterLocale: [{ type: Input }],
    scrollHeight: [{ type: Input }],
    virtualScroll: [{ type: Input }],
    virtualNodeHeight: [{ type: Input }],
    minBufferPx: [{ type: Input }],
    maxBufferPx: [{ type: Input }],
    trackBy: [{ type: Input }],
    onFilter: [{ type: Output }],
    templates: [{ type: ContentChildren, args: [PrimeTemplate,] }],
    virtualScrollBody: [{ type: ViewChild, args: [CdkVirtualScrollViewport,] }]
};
class TreeModule {
}
TreeModule.decorators = [
    { type: NgModule, args: [{
                imports: [CommonModule, ScrollingModule, RippleModule],
                exports: [Tree, SharedModule, ScrollingModule],
                declarations: [Tree, UITreeNode]
            },] }
];

/**
 * Generated bundle index. Do not edit.
 */

export { Tree, TreeModule, UITreeNode };
//# sourceMappingURL=primeng-tree.js.map