982 lines
28 KiB
JavaScript
982 lines
28 KiB
JavaScript
/**
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@license
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Copyright (c) 2025 trading_peter
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This program is available under Apache License Version 2.0
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*/
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import '@tp/tp-icon/tp-icon.js';
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import '@tp/tp-popup/tp-popup-menu.js';
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import { LitElement, html, css, svg } from 'lit';
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import { virtualize } from '@lit-labs/virtualizer/virtualize.js';
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import { Position } from '../helpers/position.js';
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export class TpTreeNav extends Position(LitElement) {
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static get styles() {
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return [
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css`
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:host {
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display: block;
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position: relative;
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--tp-tree-indent: 16px;
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--tp-tree-row-height: 28px;
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}
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.tree {
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width: 100%;
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height: 100%;
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}
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.row {
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display: flex;
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align-items: center;
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height: var(--tp-tree-row-height);
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box-sizing: border-box;
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padding: 0 8px;
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cursor: default;
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user-select: none;
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gap: 5px;
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width: 100%;
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position: relative;
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}
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.row:hover {
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background: var(--tp-tree-hover-bg, rgba(0,0,0,0.04));
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}
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.row:active {
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background: var(--tp-tree-active-bg, rgba(0,0,0,0.06));
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}
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.indent {
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width: calc(var(--tp-tree-indent) * var(--depth));
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flex: 0 0 auto;
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}
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.chevron-btn {
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width: 24px;
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height: 24px;
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display: flex;
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align-items: center;
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justify-content: center;
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flex: 0 0 auto;
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cursor: pointer;
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transition: transform 120ms ease;
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}
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.chevron-btn[hidden] {
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visibility: hidden;
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}
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.chevron-btn.expanded {
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transform: rotate(90deg);
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}
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.icon {
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width: 18px;
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height: 18px;
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flex: 0 0 auto;
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}
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.label {
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flex: 1 1 auto;
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overflow: hidden;
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text-overflow: ellipsis;
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white-space: nowrap;
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}
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.actions {
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display: flex;
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gap: 6px;
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flex: 0 0 auto;
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}
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.empty-state {
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padding: 16px;
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text-align: center;
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color: var(--tp-tree-empty-color, rgba(0,0,0,0.56));
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}
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.context-menu-overlay {
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position: absolute;
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inset: 0;
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pointer-events: none;
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}
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tp-popup-menu.context-menu {
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min-width: 180px;
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box-shadow: 0 6px 18px rgba(0,0,0,0.18);
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pointer-events: auto;
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}
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.row.drag-over-inside {
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background: var(--tp-tree-drag-over-bg, rgba(0,0,0,0.1));
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}
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.row.drag-over-before::after,
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.row.drag-over-after::after {
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content: "";
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position: absolute;
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left: calc(var(--tp-tree-indent) * var(--drag-depth, var(--depth)));
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right: 0;
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height: 2px;
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background-color: var(--tp-tree-drag-line-color, #2196f3);
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pointer-events: none;
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}
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.row.drag-over-before::after {
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top: 0;
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}
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.row.drag-over-after::after {
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bottom: 0;
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}
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.drag-clone {
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opacity: 0.5;
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position: absolute;
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z-index: 1000;
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}
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`
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];
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}
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render() {
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this._flatItems = this._flattenNodes();
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const items = this._flatItems;
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if (!items.length) {
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return html`${this._renderEmpty()}`;
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}
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return html`
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<div class="tree">
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${virtualize({
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items,
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renderItem: (item) => this._renderItem(item),
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keyFunction: (item) => item.key,
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})}
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</div>
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${this._renderContextMenu()}
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`;
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}
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_renderItem(item) {
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const { node, depth, hasChildren, expanded } = item;
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const icon = this._resolveIcon(node?.icon);
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const custom = this.renderNode?.(item, {
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depth,
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states: Array.isArray(node?.states) ? node.states : [],
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path: item.path,
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hasChildren,
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expanded,
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});
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if (custom) {
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return custom;
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}
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return html`
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<div class="row" part="row" style="--depth: ${depth}"
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draggable="${this.allowDragAndDrop ? 'true' : 'false'}"
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@click=${(e) => this._onRowClick(item, e)}
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@contextmenu=${(e) => this._onContextMenu(item, e)}
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@dragstart=${(e) => this._onDragStart(item, e)}
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@dragend=${(e) => this._onDragEnd(item, e)}
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@dragover=${(e) => this._onDragOver(item, e)}
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@dragleave=${(e) => this._onDragLeave(item, e)}
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@drop=${(e) => this._onDrop(item, e)}
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>
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<div class="indent"></div>
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<div class="chevron-btn ${expanded ? 'expanded' : ''}" part="chevron" ?hidden=${!hasChildren} @click=${(e) => this._onChevronClick(item, e)} >
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<tp-icon class="icon" part="chevron-icon" .icon=${TpTreeNav.chevron}></tp-icon>
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</div>
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${icon ? html`<tp-icon class="icon" part="icon" .icon=${icon}></tp-icon>` : html`<span class="icon" part="icon" aria-hidden="true"></span>`}
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<div class="label" part="label">${node?.label ?? ''}</div>
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${this.showActions && Array.isArray(node?.actions) && node.actions.length
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? html`
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<div class="actions" part="actions">
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${node.actions.map((action) => html`
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<tp-icon
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class="action-icon"
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part="action"
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.icon=${this._resolveIcon(action.icon)}
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.tooltip=${action.tooltip}
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@click=${(e) => this._onInlineAction(item, action, e)}
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></tp-icon>
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`)}
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</div>
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`
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: null}
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</div>
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`;
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}
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_renderContextMenu() {
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if (!this._contextMenu) return null;
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const { item, actions } = this._contextMenu;
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return html`
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<div class="context-menu-overlay">
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<tp-popup-menu class="context-menu" part="context-menu">
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${actions.map((action) => html`
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<tp-popup-menu-item .icon=${action.icon} part="context-menu-item" @click=${(e) => this._onMenuAction(action, item, e)}>
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${action?.label ?? null}
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</tp-popup-menu-item>
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`)}
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</tp-popup-menu>
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</div>
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`;
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}
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_renderEmpty() {
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if (typeof this.renderEmpty === 'function') {
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return this.renderEmpty();
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}
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return html`<div class="empty-state" part="empty">${this.emptyMessage}</div>`;
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}
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static get properties() {
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return {
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roots: { type: Array },
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defaultActions: { type: Array },
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renderNode: { type: Function },
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beforeContextMenu: { type: Function },
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renderEmpty: { type: Function },
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items: { type: Array },
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manageState: { type: Boolean },
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multiSelect: { type: Boolean },
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expandedPaths: { type: Array },
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selectedPaths: { type: Array },
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selectionState: { type: String },
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autoExpandNew: { type: Boolean },
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applyStates: { type: Function },
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emptyMessage: { type: String },
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showActions: { type: Boolean },
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expandOnDoubleClick: { type: Boolean },
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selectOnRightClick: { type: Boolean },
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allowDragAndDrop: { type: Boolean },
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canDrop: { type: Function },
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};
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}
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static get chevron() {
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return svg`<path fill="var(--tp-icon-color)" d="M8.59,16.58L13.17,12L8.59,7.41L10,6L16,12L10,18L8.59,16.58Z" />`;
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}
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static get folder() {
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return svg`<path fill="var(--tp-icon-color)" d="M10,4H4C2.89,4 2,4.89 2,6V18A2,2 0 0,0 4,20H20A2,2 0 0,0 22,18V8C22,6.89 21.1,6 20,6H12L10,4Z" />`;
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}
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static get file() {
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return svg`<path fill="var(--tp-icon-color)" d="M13,9V3.5L18.5,9M6,2C4.89,2 4,2.89 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2H6Z" />`;
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}
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static get defaultIcons() {
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return {
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chevron: TpTreeNav.chevron,
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folder: TpTreeNav.folder,
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file: TpTreeNav.file,
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};
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}
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constructor() {
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super();
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this.roots = [];
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this.defaultActions = [];
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this.renderNode = null;
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this.beforeContextMenu = null;
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this.renderEmpty = null;
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this.items = null;
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this.manageState = false;
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this.multiSelect = false;
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this.expandedPaths = [];
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this.selectedPaths = [];
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this.selectionState = 'selected';
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this.autoExpandNew = false;
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this.applyStates = null;
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this.emptyMessage = 'No items';
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this.showActions = false;
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this.expandOnDoubleClick = false;
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this.selectOnRightClick = false;
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this.allowDragAndDrop = false;
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this.canDrop = null;
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this._contextMenu = null;
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this._outsideHandler = null;
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this._keyHandler = null;
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this._dragSource = null;
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this._knownPaths = new Set();
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this._expandedPathSet = new Set();
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this._selectedPathSet = new Set();
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}
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disconnectedCallback() {
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super.disconnectedCallback();
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this._removeOutsideHandlers();
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}
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updated(changed) {
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super.updated?.(changed);
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const managed = this.manageState;
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const itemsChanged = managed && changed.has('items');
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const expandChanged = managed && changed.has('expandedPaths');
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const selectChanged = managed && changed.has('selectedPaths');
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if (managed && (itemsChanged || expandChanged || selectChanged)) {
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this._rebuildManagedTree();
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}
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}
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_flattenNodes() {
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const results = [];
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const roots = Array.isArray(this.roots) ? this.roots : [];
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const walk = (nodes, depth, path) => {
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if (!Array.isArray(nodes)) return;
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nodes.forEach((node, index) => {
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const slug = node?.slug ?? `${index}`;
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const nextPath = [...path, slug];
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const states = Array.isArray(node?.states) ? node.states : [];
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const hasChildren = Array.isArray(node?.children) && node.children.length > 0;
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const expanded = states.includes('expanded');
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results.push({
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node,
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depth,
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path: nextPath,
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hasChildren,
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expanded,
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key: nextPath.join('/'),
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});
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if (hasChildren && expanded) {
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walk(node.children, depth + 1, nextPath);
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}
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});
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};
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walk(roots, 0, []);
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return results;
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}
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_onRowClick(item, originalEvent) {
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const isDouble = this.expandOnDoubleClick && originalEvent?.detail === 2;
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if (this.manageState) {
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const pathStr = item.path.join('/');
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const set = new Set(this._selectedPathSet);
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if (this.multiSelect) {
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if (set.has(pathStr)) {
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set.delete(pathStr);
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} else {
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set.add(pathStr);
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}
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} else {
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set.clear();
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set.add(pathStr);
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}
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this._selectedPathSet = set;
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this.selectedPaths = Array.from(set);
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this._rebuildManagedTree();
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this.dispatchEvent(new CustomEvent('node-selected', {
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detail: { node: item.node, path: item.path, originalEvent },
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bubbles: true,
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composed: true,
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}));
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}
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if (isDouble) {
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this._toggleExpand(item, 'double-click', originalEvent);
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}
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this.dispatchEvent(new CustomEvent('node-click', {
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detail: { node: item.node, path: item.path, originalEvent },
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bubbles: true,
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composed: true,
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cancelable: true,
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}));
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}
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_onChevronClick(item, originalEvent) {
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originalEvent.stopPropagation();
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this._toggleExpand(item, 'chevron', originalEvent);
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}
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_toggleExpand(item, source, originalEvent) {
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if (this.manageState) {
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const pathStr = item.path.join('/');
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const set = new Set(this._expandedPathSet);
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if (set.has(pathStr)) {
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set.delete(pathStr);
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} else {
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set.add(pathStr);
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}
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this._expandedPathSet = set;
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this.expandedPaths = Array.from(set);
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this._rebuildManagedTree();
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}
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this._dispatchAction('toggle', item, source, originalEvent);
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}
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async _onContextMenu(item, originalEvent) {
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originalEvent.preventDefault();
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if (this.selectOnRightClick && this.manageState) {
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const pathStr = item.path.join('/');
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const set = new Set(this._selectedPathSet);
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let changed = false;
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if (this.multiSelect) {
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if (!set.has(pathStr)) {
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set.add(pathStr);
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changed = true;
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}
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} else {
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if (!set.has(pathStr) || set.size !== 1) {
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set.clear();
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set.add(pathStr);
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changed = true;
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}
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}
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if (changed) {
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this._selectedPathSet = set;
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this.selectedPaths = Array.from(set);
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this._rebuildManagedTree();
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this.dispatchEvent(new CustomEvent('node-selected', {
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detail: { node: item.node, path: item.path, originalEvent },
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bubbles: true,
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composed: true,
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}));
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}
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}
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const contextEvent = new CustomEvent('node-context', {
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detail: { item, originalEvent },
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bubbles: true,
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composed: true,
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cancelable: true,
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});
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this.dispatchEvent(contextEvent);
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if (contextEvent.defaultPrevented) return;
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const baseActions = this._mergeActions(
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this.defaultActions,
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this._normalizeActions(item.node?.actions)
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);
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const maybeModified = this.beforeContextMenu
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? this.beforeContextMenu(item, baseActions)
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: baseActions;
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const actions = await Promise.resolve(maybeModified);
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if (actions === false) return;
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const x = originalEvent.clientX;
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const y = originalEvent.clientY;
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this._contextMenu = { item, actions: Array.isArray(actions) ? actions : baseActions };
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this.requestUpdate();
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await this.updateComplete;
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const menu = this.shadowRoot.querySelector('.context-menu');
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if (menu) {
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const anchor = {
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getBoundingClientRect: () => ({
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top: y, bottom: y, left: x, right: x, width: 0, height: 0
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})
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};
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this._posFixed(anchor, menu, { valign: 'bottom', halign: 'left' });
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}
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this._attachOutsideHandlers();
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}
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_dispatchAction(action, item, source, originalEvent) {
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const ev = new CustomEvent('node-action', {
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detail: { action, item, source, originalEvent },
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bubbles: true,
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composed: true,
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cancelable: true,
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});
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this.dispatchEvent(ev);
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}
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_onMenuAction(action, item, originalEvent) {
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originalEvent.stopPropagation();
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this._dispatchAction(action?.action, item, 'context-menu', originalEvent);
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this._closeContextMenu();
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}
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_onInlineAction(item, action, originalEvent) {
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originalEvent.stopPropagation();
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this._dispatchAction(action?.action, item, 'inline-action', originalEvent);
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}
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_onDragStart(item, e) {
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if (!this.allowDragAndDrop) {
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e.preventDefault();
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return;
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}
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this._dragSource = item;
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e.dataTransfer.effectAllowed = 'move';
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const row = e.currentTarget;
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const rect = row.getBoundingClientRect();
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const clone = row.cloneNode(true);
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clone.classList.add('drag-clone');
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clone.setAttribute('part', 'drag-clone');
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clone.style.width = `${rect.width}px`;
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clone.style.height = `${rect.height}px`;
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clone.style.top = '-1000px';
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clone.style.left = '-1000px';
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this.shadowRoot.appendChild(clone);
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const offsetX = e.clientX - rect.left;
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const offsetY = e.clientY - rect.top;
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e.dataTransfer.setDragImage(clone, offsetX, offsetY);
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setTimeout(() => {
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clone.remove();
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}, 0);
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}
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_onDragEnd(item, e) {
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this._dragSource = null;
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}
|
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|
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_onDragOver(item, e) {
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if (!this.allowDragAndDrop || !this._dragSource) return;
|
|
|
|
e.preventDefault(); // Allow drop
|
|
|
|
const row = e.currentTarget;
|
|
const rect = row.getBoundingClientRect();
|
|
const y = e.clientY - rect.top;
|
|
const h = rect.height;
|
|
|
|
let position = 'inside';
|
|
if (y < h * 0.25) position = 'before';
|
|
else if (y > h * 0.75) position = 'after';
|
|
|
|
// Don't allow dropping on itself
|
|
if (this._dragSource.key === item.key) {
|
|
this._clearDragClasses(row);
|
|
e.dataTransfer.dropEffect = 'none';
|
|
return;
|
|
}
|
|
|
|
// Avoid redundant drop target (After Expanded Parent vs Before First Child)
|
|
if (position === 'after' && item.expanded && item.hasChildren) {
|
|
this._clearDragClasses(row);
|
|
e.dataTransfer.dropEffect = 'none';
|
|
return;
|
|
}
|
|
|
|
// Resolve logical target (handle expanded parent case and unindent)
|
|
const { target: logicalTarget, position: logicalPosition, depth: dragDepth } = this._resolveDropTarget(item, position, e);
|
|
|
|
// Check for no-op
|
|
if (this._isNoOp(this._dragSource, logicalTarget, logicalPosition)) {
|
|
this._clearDragClasses(row);
|
|
e.dataTransfer.dropEffect = 'none';
|
|
return;
|
|
}
|
|
|
|
// Check user validation
|
|
if (this.canDrop && !this.canDrop(this._dragSource, logicalTarget, logicalPosition)) {
|
|
this._clearDragClasses(row);
|
|
e.dataTransfer.dropEffect = 'none';
|
|
return;
|
|
}
|
|
|
|
e.dataTransfer.dropEffect = 'move';
|
|
|
|
this._clearDragClasses(row);
|
|
row.classList.add(`drag-over-${position}`);
|
|
if (dragDepth !== undefined) {
|
|
row.style.setProperty('--drag-depth', dragDepth);
|
|
}
|
|
}
|
|
|
|
_onDragLeave(item, e) {
|
|
const row = e.currentTarget;
|
|
if (row.contains(e.relatedTarget)) return;
|
|
this._clearDragClasses(row);
|
|
}
|
|
|
|
_onDrop(item, e) {
|
|
if (!this.allowDragAndDrop || !this._dragSource) return;
|
|
e.preventDefault();
|
|
const row = e.currentTarget;
|
|
this._clearDragClasses(row);
|
|
|
|
const rect = row.getBoundingClientRect();
|
|
const y = e.clientY - rect.top;
|
|
const h = rect.height;
|
|
|
|
let position = 'inside';
|
|
if (y < h * 0.25) position = 'before';
|
|
else if (y > h * 0.75) position = 'after';
|
|
|
|
if (this._dragSource.key === item.key) return;
|
|
|
|
// Avoid redundant drop target (After Expanded Parent vs Before First Child)
|
|
if (position === 'after' && item.expanded && item.hasChildren) {
|
|
return;
|
|
}
|
|
|
|
// Resolve logical target (handle expanded parent case and unindent)
|
|
const { target: logicalTarget, position: logicalPosition } = this._resolveDropTarget(item, position, e);
|
|
|
|
if (this._isNoOp(this._dragSource, logicalTarget, logicalPosition)) {
|
|
return;
|
|
}
|
|
|
|
if (this.canDrop && !this.canDrop(this._dragSource, logicalTarget, logicalPosition)) {
|
|
return;
|
|
}
|
|
|
|
this.dispatchEvent(new CustomEvent('node-drop', {
|
|
detail: {
|
|
source: this._dragSource,
|
|
target: logicalTarget,
|
|
position: logicalPosition,
|
|
originalEvent: e
|
|
},
|
|
bubbles: true,
|
|
composed: true
|
|
}));
|
|
|
|
this._dragSource = null;
|
|
}
|
|
|
|
_isNoOp(source, target, position) {
|
|
if (!source || !target) return true;
|
|
if (source.key === target.key) return true;
|
|
|
|
const srcPathStr = source.path.slice(0, -1).join('/');
|
|
const tgtPathStr = target.path.slice(0, -1).join('/');
|
|
|
|
if (srcPathStr !== tgtPathStr) return false;
|
|
|
|
const siblings = this._getSiblings(source.path);
|
|
if (!siblings) return false;
|
|
|
|
const srcIdx = siblings.indexOf(source.node);
|
|
const tgtIdx = siblings.indexOf(target.node);
|
|
|
|
if (srcIdx === -1 || tgtIdx === -1) return false;
|
|
|
|
if (position === 'before') {
|
|
if (srcIdx === tgtIdx - 1) return true;
|
|
}
|
|
if (position === 'after') {
|
|
if (srcIdx === tgtIdx + 1) return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
_getSiblings(path) {
|
|
if (path.length === 1) return this.roots;
|
|
|
|
let nodes = this.roots;
|
|
for (let i = 0; i < path.length - 1; i++) {
|
|
const slug = path[i];
|
|
const node = nodes.find((n, idx) => (n.slug ?? `${idx}`) === slug);
|
|
if (!node) return null;
|
|
nodes = node.children || [];
|
|
}
|
|
return nodes;
|
|
}
|
|
|
|
_resolveDropTarget(item, position, e) {
|
|
if (!this._flatItems) return { target: item, position };
|
|
|
|
const index = this._flatItems.findIndex(i => i.key === item.key);
|
|
if (index === -1) return { target: item, position };
|
|
|
|
const currentItem = this._flatItems[index];
|
|
|
|
// Handle Unindent on "After"
|
|
// Only if we are at the bottom of a block (next item has lower depth or is end of list)
|
|
if (position === 'after' && e) {
|
|
const nextItem = this._flatItems[index + 1];
|
|
const currentDepth = currentItem.depth;
|
|
const nextDepth = nextItem ? nextItem.depth : -1; // -1 allows unindenting to root (depth 0)
|
|
|
|
if (nextDepth < currentDepth) {
|
|
// We are at a step down. Calculate target depth from mouse X.
|
|
const indent = 16; // Hardcoded for now, matching CSS default
|
|
const padding = 8; // Matching CSS padding
|
|
const rowRect = e.currentTarget.getBoundingClientRect();
|
|
const mouseX = e.clientX - rowRect.left;
|
|
|
|
// Calculate desired depth based on mouse position
|
|
let targetDepth = Math.floor((mouseX - padding) / indent);
|
|
|
|
// Clamp target depth
|
|
// Can't be deeper than current
|
|
// Can't be shallower than next item's depth (visual constraint)
|
|
// Actually, we can target any ancestor that ends here.
|
|
// The ancestors end at depths: currentDepth, currentDepth-1, ... nextDepth.
|
|
|
|
// Example:
|
|
// A (0)
|
|
// B (1)
|
|
// C (2) <- Item. Next is D (0).
|
|
// We can drop after C (depth 2), after B (depth 1), after A (depth 0).
|
|
// So valid depths are [nextDepth ... currentDepth].
|
|
// Note: nextDepth is the depth of the *next sibling* of the ancestor we target.
|
|
// If next is D(0), we can target A(0).
|
|
|
|
// Ensure targetDepth is within valid range
|
|
if (targetDepth < nextDepth) targetDepth = nextDepth;
|
|
if (targetDepth > currentDepth) targetDepth = currentDepth;
|
|
|
|
if (targetDepth < currentDepth) {
|
|
// Find the ancestor at targetDepth
|
|
// Walk backwards from current item? No, ancestors are before.
|
|
// But we want the ancestor that *contains* current item.
|
|
// We can walk backwards from index.
|
|
let ancestor = currentItem;
|
|
for (let i = index; i >= 0; i--) {
|
|
if (this._flatItems[i].depth === targetDepth) {
|
|
ancestor = this._flatItems[i];
|
|
break;
|
|
}
|
|
}
|
|
return { target: ancestor, position: 'after', depth: targetDepth };
|
|
}
|
|
}
|
|
}
|
|
|
|
return { target: currentItem, position };
|
|
}
|
|
|
|
_clearDragClasses(row) {
|
|
row.classList.remove('drag-over-inside', 'drag-over-before', 'drag-over-after');
|
|
row.style.removeProperty('--drag-depth');
|
|
}
|
|
|
|
_attachOutsideHandlers() {
|
|
if (this._outsideHandler) return;
|
|
this._outsideHandler = (e) => {
|
|
const menu = this.shadowRoot.querySelector('.context-menu');
|
|
if (menu && e.composedPath().includes(menu)) return;
|
|
this._closeContextMenu();
|
|
};
|
|
this._keyHandler = (e) => {
|
|
if (e.key === 'Escape') {
|
|
this._closeContextMenu();
|
|
}
|
|
};
|
|
window.addEventListener('pointerdown', this._outsideHandler, true);
|
|
window.addEventListener('keydown', this._keyHandler, true);
|
|
}
|
|
|
|
_removeOutsideHandlers() {
|
|
if (this._outsideHandler) {
|
|
window.removeEventListener('pointerdown', this._outsideHandler, true);
|
|
this._outsideHandler = null;
|
|
}
|
|
if (this._keyHandler) {
|
|
window.removeEventListener('keydown', this._keyHandler, true);
|
|
this._keyHandler = null;
|
|
}
|
|
}
|
|
|
|
_closeContextMenu() {
|
|
this._contextMenu = null;
|
|
this.requestUpdate();
|
|
this._removeOutsideHandlers();
|
|
}
|
|
|
|
_normalizeActions(actions) {
|
|
if (!actions) return [];
|
|
if (Array.isArray(actions)) return actions;
|
|
if (typeof actions === 'object') return Object.values(actions);
|
|
return [];
|
|
}
|
|
|
|
_mergeActions(defaults = [], nodeActions = []) {
|
|
const map = new Map();
|
|
const add = (list) => {
|
|
list?.forEach((a) => {
|
|
if (a && a.action) {
|
|
map.set(a.action, a);
|
|
}
|
|
});
|
|
};
|
|
add(defaults);
|
|
add(nodeActions);
|
|
return Array.from(map.values());
|
|
}
|
|
|
|
_resolveIcon(icon) {
|
|
if (!icon) return null;
|
|
if (typeof icon === 'string') {
|
|
return TpTreeNav.defaultIcons[icon] ?? null;
|
|
}
|
|
return icon;
|
|
}
|
|
|
|
_rebuildManagedTree() {
|
|
this._expandedPathSet = new Set(this.expandedPaths || this._expandedPathSet);
|
|
this._selectedPathSet = new Set(this.selectedPaths || this._selectedPathSet);
|
|
|
|
const { nodes, allPaths, expandedPaths, selectedPaths } = TpTreeNav.buildTree(
|
|
Array.isArray(this.items) ? this.items : [],
|
|
{
|
|
expandedPaths: this._expandedPathSet,
|
|
selectedPaths: this._selectedPathSet,
|
|
selectionState: this.selectionState,
|
|
applyStates: this.applyStates,
|
|
knownPaths: this._knownPaths,
|
|
autoExpandNew: this.autoExpandNew,
|
|
}
|
|
);
|
|
|
|
this._knownPaths = allPaths;
|
|
this._expandedPathSet = new Set([...expandedPaths].filter((p) => allPaths.has(p)));
|
|
this._selectedPathSet = new Set([...selectedPaths].filter((p) => allPaths.has(p)));
|
|
this.roots = nodes;
|
|
}
|
|
|
|
getNodesWithState(state) {
|
|
const matches = [];
|
|
this._walkNodes(this.roots, [], (node, path) => {
|
|
if (Array.isArray(node?.states) && node.states.includes(state)) {
|
|
matches.push({ node, path });
|
|
}
|
|
});
|
|
return matches;
|
|
}
|
|
|
|
clearState(state) {
|
|
const { nodes } = this._mapTree(this.roots, (node) => {
|
|
const states = Array.isArray(node?.states)
|
|
? node.states.filter((s) => s !== state)
|
|
: [];
|
|
const changed = (node.states?.length ?? 0) !== states.length;
|
|
return changed ? { ...node, states } : node;
|
|
});
|
|
return nodes;
|
|
}
|
|
|
|
applyStateIf(state, predicate) {
|
|
if (typeof predicate !== 'function') return this.roots;
|
|
const { nodes } = this._mapTree(this.roots, (node, path) => {
|
|
const states = Array.isArray(node?.states) ? [...node.states] : [];
|
|
if (predicate(node, path) && !states.includes(state)) {
|
|
states.push(state);
|
|
return { ...node, states };
|
|
}
|
|
return node;
|
|
});
|
|
return nodes;
|
|
}
|
|
|
|
_walkNodes(nodes, path, visitor) {
|
|
if (!Array.isArray(nodes)) return;
|
|
nodes.forEach((node, index) => {
|
|
const slug = node?.slug ?? `${index}`;
|
|
const nextPath = [...path, slug];
|
|
visitor(node, nextPath);
|
|
if (Array.isArray(node?.children) && node.children.length) {
|
|
this._walkNodes(node.children, nextPath, visitor);
|
|
}
|
|
});
|
|
}
|
|
|
|
_mapTree(nodes, mapper, path = []) {
|
|
if (!Array.isArray(nodes)) return { nodes: [], changed: false };
|
|
let changed = false;
|
|
const mapped = nodes.map((node, index) => {
|
|
const slug = node?.slug ?? `${index}`;
|
|
const nextPath = [...path, slug];
|
|
const mappedNode = mapper(node, nextPath) ?? node;
|
|
|
|
const { nodes: childNodes, changed: childChanged } = this._mapTree(
|
|
node?.children,
|
|
mapper,
|
|
nextPath
|
|
);
|
|
|
|
const children = childChanged ? childNodes : node?.children;
|
|
const nodeChanged = mappedNode !== node || childChanged;
|
|
|
|
if (nodeChanged) {
|
|
changed = true;
|
|
return { ...mappedNode, children };
|
|
}
|
|
|
|
return mappedNode;
|
|
});
|
|
return { nodes: mapped, changed };
|
|
}
|
|
|
|
static buildTree(items = [], options = {}) {
|
|
const {
|
|
expandedPaths = new Set(),
|
|
selectedPaths = new Set(),
|
|
selectionState = 'selected',
|
|
applyStates,
|
|
knownPaths,
|
|
autoExpandNew = false,
|
|
} = options;
|
|
|
|
const exp = expandedPaths instanceof Set ? new Set(expandedPaths) : new Set(expandedPaths);
|
|
const sel = selectedPaths instanceof Set ? new Set(selectedPaths) : new Set(selectedPaths);
|
|
const allPaths = new Set();
|
|
|
|
const mapNode = (node, parentPath = '') => {
|
|
const segment = node?.slug ?? '';
|
|
const fullPath = parentPath ? `${parentPath}/${segment}` : segment;
|
|
allPaths.add(fullPath);
|
|
|
|
if (autoExpandNew && knownPaths && !knownPaths.has(fullPath)) {
|
|
exp.add(fullPath);
|
|
}
|
|
|
|
const states = [];
|
|
if (exp.has(fullPath)) states.push('expanded');
|
|
if (sel.has(fullPath) && selectionState) states.push(selectionState);
|
|
|
|
const extraStates = applyStates ? applyStates(node, fullPath.split('/'), states) : null;
|
|
if (Array.isArray(extraStates)) {
|
|
extraStates.forEach((s) => {
|
|
if (s && !states.includes(s)) states.push(s);
|
|
});
|
|
}
|
|
|
|
const children = Array.isArray(node?.children)
|
|
? node.children.map((child) => mapNode(child, fullPath))
|
|
: [];
|
|
|
|
return {
|
|
...node,
|
|
states,
|
|
fullPath,
|
|
children,
|
|
source: node,
|
|
};
|
|
};
|
|
|
|
const nodes = Array.isArray(items) ? items.map((n) => mapNode(n, '')) : [];
|
|
|
|
return { nodes, allPaths, expandedPaths: exp, selectedPaths: sel };
|
|
}
|
|
}
|
|
|
|
window.customElements.define('tp-tree-nav', TpTreeNav);
|