Refactored tree to sidebar
This commit is contained in:
Magnus Åhall
parent
83abc3f456
commit
b3e5d79403
4 changed files with 25 additions and 25 deletions
602
static/js/sidebar.mjs
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602
static/js/sidebar.mjs
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@ -0,0 +1,602 @@
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import { ROOT_NODE } from 'node_store'
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import { CustomHTMLElement } from './lib/custom_html_element.mjs'
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import { Color, Solver } from './lib/css_colorize.mjs'
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import { Node } from './page_node.mjs'
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// TreeExpandedHandler is responsible for collapsing or expanding
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// the node tree, wide view or narrow "mobile" view.
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class TreeExpansionHandler {// {{{
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constructor() {
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this.isNarrow = false
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this.initializeMediaHandler()
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this.initializeBusEvents()
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}
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initializeBusEvents() {
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_mbus.subscribe('TREE_EXPANSION', ({ detail }) => {
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// When a node is selected on the screen and the screen
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// is narrow the tree is automatically hidden.
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//
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// Can't always hide the tree automatically when a node
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// is selected since the wide mode shows the tree as standard.
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if (detail.data?.when == 'narrow' && !this.isNarrow)
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return
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this.treeExpansion(detail.data?.expand)
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})
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}
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initializeMediaHandler() {
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const query = window.matchMedia('(max-width: 800px)')
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query.addEventListener('change', event => this.screenNarrowHandler(event))
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// Run once to set initial state, instead of needing to toggle state.
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this.screenNarrowHandler(query)
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}
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// When screen becomes narrow, the tree is automatically hidden.
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// Primary purpose is to read content, not browse, which is why
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// the tree is hidden as standard.
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screenNarrowHandler(event) {
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this.isNarrow = event.matches
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if (this.isNarrow)
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this.treeExpansion(false)
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else
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this.treeExpansion(true)
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}
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treeExpansion(expanded) {
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const notes2 = document.getElementById('notes2')
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if (expanded) {
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notes2.classList.remove('hide-tree')
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notes2.classList.add('show-tree')
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} else {
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notes2.classList.add('hide-tree')
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notes2.classList.remove('show-tree')
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}
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}
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}// }}}
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export class N2Sidebar extends CustomHTMLElement {
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static {// {{{
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this.tmpl = document.createElement('template')
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this.tmpl.innerHTML = `
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<style>
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n2-sidebar {
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#logo {
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display: grid;
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grid-template-columns: 1fr min-content;
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align-items: center;
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justify-items: start;
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cursor: pointer;
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padding: 16px;
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border-bottom: 1px solid var(--line-color);
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img:first-child {
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height: 24px;
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margin-right: 8px;
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}
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}
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.icons {
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display: flex;
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justify-content: center;
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margin-top: 16px;
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gap: 8px;
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padding-bottom: 16px;
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border-bottom: 1px solid var(--line-color);
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}
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.el-hide-tree {
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font-size: 1.25em;
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font-weight: bold;
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cursor: pointer;
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margin-left: 16px;
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}
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}
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</style>
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<div id="logo">
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<img data-el="logo" src="/images/${_VERSION}/logo.svg" />
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<div data-el="hide-tree"><</div>
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</div>
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<div class="icons">
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<img data-el="sync" class='sync colorize' src="/images/${_VERSION}/icon_refresh.svg" />
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<img data-el="search" class='search colorize' src="/images/${_VERSION}/icon_search.svg" style="height: 22px" />
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<img data-el="settings" class='settings colorize' src="/images/${_VERSION}/icon_settings.svg" />
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</div>
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<div data-el="treenodes"></div>
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`
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}// }}}
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constructor() {// {{{
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super()
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this.id = 'tree-nodes'
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this.tabIndex = 0
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this.treeNodeComponents = {}
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this.treeTrunk = []
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this.expandedNodes = {} // keyed on UUID
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this.selectedNode = null
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this.rendered = false
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new TreeExpansionHandler()
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this.addEventListener('keydown', event => this.keyHandler(event))
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this.elSearch.addEventListener('click', () => _mbus.dispatch('op-search'))
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this.elSync.addEventListener('click', () => _sync.run())
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this.elLogo.addEventListener('click', () => _app.goToNode(ROOT_NODE, false, false))
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this.elHideTree.addEventListener('click', event => {
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event.stopPropagation()
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_mbus.dispatch('TREE_EXPANSION', { expand: false })
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})
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_mbus.subscribe('NODE_MODIFIED', ({ detail }) => {
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const node = detail.data.node
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const treenode = this.treeNodeComponents[node.get('UUID')]
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if (!treenode)
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return
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treenode.node = node
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treenode.render(true)
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})
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this.populateFirstLevel()
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/* XXX - set color */
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let color = new Color(0x80, 0x00, 0x33)
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let solver = new Solver(color)
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let result = solver.solve()
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// console.log(result.filter)
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}// }}}
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async render() {// {{{
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if (this.rendered)
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alert('Tree should only be rendered once.')
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this.expandedNodes[ROOT_NODE] = true
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const startnode = await nodeStore.get(ROOT_NODE)
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const starttreenode = new N2TreeNode(this, startnode, null)
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this.treeNodeComponents[startnode.UUID] = starttreenode
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this.elTreenodes.appendChild(starttreenode.render())
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this.rendered = true
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return this
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}// }}}
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reset() {// {{{
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this.treeNodeComponents = {}
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this.treeTrunk = []
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this.rendered = false
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this.elTreenodes.replaceChildren()
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this.populateFirstLevel()
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}// }}}
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populateFirstLevel() {//{{{
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nodeStore.get(ROOT_NODE)
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.then(node => node.fetchChildren())
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.then(children => {
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this.treeNodeComponents = {}
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this.treeTrunk = []
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for (const node of children) {
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// The root node isn't supposed to be shown in the tree.
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if (node.UUID === ROOT_NODE)
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continue
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if (node.ParentUUID === ROOT_NODE)
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this.treeTrunk.push(node)
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}
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_mbus.dispatch('TREE_TRUNK_FETCHED')
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})
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.catch(e => {
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console.error(e)
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console.log(e.type, e.error)
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alert(e.error)
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})
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}//}}}
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getNodeExpanded(UUID) {//{{{
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if (this.expandedNodes[UUID] === undefined)
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this.expandedNodes[UUID] = false
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return this.expandedNodes[UUID]
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}//}}}
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setNodeExpanded(node, value) {//{{{
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let expanded = this.expandedNodes[node.UUID]
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if (expanded === undefined) {
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this.expandedNodes[node.UUID] = false
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expanded = false
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}
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if (expanded === value)
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return
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this.expandedNodes[node.UUID] = value
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_mbus.dispatch(`NODE_EXPAND_${node.UUID}`, value)
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}//}}}
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setSelected(node, dontExpand) {//{{{
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if (node === undefined)
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return
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// The previously selected node, if any, needs to be rerendered
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// to not retain its 'selected' class.
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const prevUUID = this.selectedNode?.UUID
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this.selectedNode = node
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if (prevUUID)
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this.treeNodeComponents[prevUUID]?.render(true)
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// And now the newly selected node is rerendered.
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this.treeNodeComponents[node.UUID]?.render(true)
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if (!dontExpand)
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this.setNodeExpanded(node, true)
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}//}}}
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isSelected(node) {//{{{
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return this.selectedNode?.UUID === node.UUID
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}//}}}
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async keyHandler(event) {//{{{
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let handled = true
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const n = this.selectedNode
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const Space = ' '
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// This handler would otherwise react to stuff like Ctrl+L.
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if (event.ctrlKey || event.altKey)
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return
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switch (event.key) {
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// Space and enter is toggling expansion.
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// Holding shift down does it recursively.
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case Space:
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case 'Enter':
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const expanded = this.getNodeExpanded(n.UUID)
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if (event.shiftKey) {
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this.recursiveExpand(n, !expanded)
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} else {
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this.setNodeExpanded(n, !expanded)
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}
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break
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case 'g':
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case 'Home':
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this.navigateTop()
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break
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case 'G':
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case 'End':
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this.navigateBottom()
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break
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case 'j':
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case 'ArrowDown':
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await this.navigateDown(this.selectedNode)
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break
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case 'k':
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case 'ArrowUp':
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await this.navigateUp(this.selectedNode)
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break
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case 'h':
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case 'ArrowLeft':
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await this.navigateLeft(this.selectedNode)
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break
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case 'l':
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case 'ArrowRight':
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await this.navigateRight(this.selectedNode)
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break
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default:
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// nonsole.log(event.key)
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handled = false
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}
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if (handled) {
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event.preventDefault()
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event.stopPropagation()
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}
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}//}}}
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async navigateLeft(n) {//{{{
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if (n === null || n === undefined)
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return
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const expanded = this.getNodeExpanded(n.UUID)
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if (expanded && n.hasChildren()) {
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this.setNodeExpanded(n, false)
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return
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}
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if (n.isFirstSibling()) {
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: n.getParent()?.UUID, dontPush: false, dontExpand: true })
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return
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}
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const siblingBefore = n.getSiblingBefore()
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const siblingExpanded = this.getNodeExpanded(siblingBefore?.UUID)
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if (siblingBefore !== null && siblingExpanded && siblingBefore.hasChildren()) {
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const siblingAbove = this.getLastExpandedNode(siblingBefore)
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: siblingAbove?.UUID, dontPush: false, dontExpand: true })
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return
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}
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: n.getSiblingBefore()?.UUID, dontPush: false, dontExpand: true })
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}//}}}
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async navigateRight(n) {//{{{
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if (n === null || n === undefined)
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return
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const siblingAfter = n.getSiblingAfter()
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const expanded = this.getNodeExpanded(n.UUID)
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if (!expanded && n.hasChildren()) {
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this.setNodeExpanded(n, true)
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return
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}
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if (expanded && n.hasChildren()) {
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: n.Children[0]?.UUID, dontPush: false, dontExpand: true })
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return
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}
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if (n.isLastSibling()) {
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const nextNode = this.getParentWithNextSibling(n)
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: nextNode?.UUID, dontPush: false, dontExpand: true })
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return
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}
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: n.getSiblingAfter()?.UUID, dontPush: false, dontExpand: true })
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}//}}}
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async navigateUp(n) {//{{{
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if (n === null || n === undefined)
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return
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let parent = null
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const siblingBefore = n.getSiblingBefore()
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let siblingExpanded = false
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if (siblingBefore !== null)
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siblingExpanded = this.getNodeExpanded(siblingBefore.UUID)
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if (n.isFirstSibling()) {
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parent = n.getParent()
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: parent?.UUID, dontPush: false, dontExpand: true })
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return
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}
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if (siblingBefore !== null && siblingExpanded && siblingBefore.hasChildren()) {
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: siblingBefore.Children[siblingBefore.Children.length - 1]?.UUID, dontPush: false, dontExpand: true })
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return
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}
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if (siblingBefore) {
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: siblingBefore.UUID, dontPush: false, dontExpand: true })
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return
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}
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}//}}}
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async navigateDown(n) {//{{{
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if (n === null || n === undefined)
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return
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const nodeExpanded = this.getNodeExpanded(n.UUID)
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// Last node, not expanded, so it matters not whether it has children or not.
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// Traverse upward to nearest parent with next sibling.
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if (!nodeExpanded && n.isLastSibling()) {
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const wantedNode = this.getParentWithNextSibling(n)
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: wantedNode?.UUID, dontPush: false, dontExpand: true })
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return
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}
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if (nodeExpanded && n.isLastSibling() && !n.hasChildren()) {
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const wantedNode = this.getParentWithNextSibling(n)
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: wantedNode?.UUID, dontPush: false, dontExpand: true })
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return
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}
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// Node not expanded. Go to this node's next sibling.
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// GoToNode will abort if given null.
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if (!nodeExpanded || !n.hasChildren()) {
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: n.getSiblingAfter()?.UUID, dontPush: false, dontExpand: true })
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return
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}
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// Node is expanded.
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// Children will be visually beneath this node, if any.
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if (nodeExpanded && n.hasChildren()) {
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: n.Children[0].UUID, dontPush: false, dontExpand: true })
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return
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}
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}//}}}
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async navigateTop() {//{{{
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const root = await nodeStore.get(ROOT_NODE)
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if (root.Children.length === 0)
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return
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: root.Children[0]?.UUID, dontPush: false, dontExpand: true })
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}//}}}
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async navigateBottom() {//{{{
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const root = await nodeStore.get(ROOT_NODE)
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if (root.Children.length === 0)
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return
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const toplevel = root.Children[root.Children.length - 1]
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const toplevelExpanded = this.getNodeExpanded(toplevel?.UUID)
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if (toplevelExpanded) {
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const lastnode = this.getLastExpandedNode(toplevel)
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: lastnode?.UUID, dontPush: false, dontExpand: true })
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} else
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_mbus.dispatch("GO_TO_NODE", { nodeUUID: root.Children[root.Children.length - 1]?.UUID, dontPush: false, dontExpand: true })
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}//}}}
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getParentWithNextSibling(node) {//{{{
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let currNode = node
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while (currNode !== null && currNode.UUID !== ROOT_NODE && currNode.getSiblingAfter() === null) {
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currNode = currNode.getParent()
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}
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return currNode?.getSiblingAfter()
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}//}}}
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getLastExpandedNode(node) {//{{{
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let currNode = node
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while (this.getNodeExpanded(currNode.UUID) && currNode.hasChildren()) {
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currNode = currNode.Children[currNode.Children.length - 1]
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}
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return currNode
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}//}}}
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async recursiveExpand(node, state) {//{{{
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if (state)
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await this.setNodeExpanded(node, true)
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for (const child of node.Children)
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await this.recursiveExpand(child, state)
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if (!state)
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await this.setNodeExpanded(node, false)
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}//}}}
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async makeVisible(node) {// {{{
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const treenode = this.treeNodeComponents[node.UUID]
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const ancestors = await nodeStore.getNodeAncestry(node)
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for (const ancestor of ancestors.reverse()) {
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this.setNodeExpanded(ancestor, true)
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}
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// The ROOT_NODE for example hasn't got a treenode.
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treenode?.scrollIntoView({ block: 'nearest' })
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}// }}}
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}
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customElements.define('n2-sidebar', N2Sidebar)
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export class N2TreeNode extends CustomHTMLElement {
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static {// {{{
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this.tmpl = document.createElement('template')
|
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this.tmpl.innerHTML = `
|
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<style>
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n2-sidebar:focus-within {
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.el-name {
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&.selected {
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span {
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position:relative;
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}
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span:before {
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position: absolute;
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content: '';
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top: -8px;
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left: -36px;
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right: -8px;
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bottom: -4px;
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z-index: -1;
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background-color: #f8f8f8;
|
||||
border: 1px solid #ddd;
|
||||
border-radius: 4px;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
</style>
|
||||
|
||||
<div data-el="expand-toggle" class="expand-toggle">
|
||||
<img data-el="expand">
|
||||
</div>
|
||||
<div data-el="name" class="name"><span></span></div>
|
||||
<div data-el="children" class="children"></div>
|
||||
`
|
||||
}// }}}
|
||||
|
||||
constructor(sidebar, node, parent) {//{{{
|
||||
super()
|
||||
this.classList.add('node')
|
||||
|
||||
this.sidebar = sidebar
|
||||
this.node = node
|
||||
this.parent = parent
|
||||
|
||||
this.children_populated = false
|
||||
this.rendered = false
|
||||
|
||||
this.elExpandToggle.addEventListener('click', () => this.sidebar.setNodeExpanded(this.node, !this.sidebar.getNodeExpanded(this.node.UUID)))
|
||||
this.elName.addEventListener('click', () => _mbus.dispatch('TREE_NODE_SELECTED', this.node))
|
||||
|
||||
_mbus.subscribe(`NODE_CHILDREN_FETCHED_${node.UUID}`, () => {
|
||||
this.render(true)
|
||||
})
|
||||
|
||||
_mbus.subscribe(`NODE_EXPAND_${node.UUID}`, _state => {
|
||||
this.render(true)
|
||||
})
|
||||
|
||||
if (this.node.Level === 0 || this.sidebar.getNodeExpanded(this.node.UUID))
|
||||
this.fetchChildren()
|
||||
}// }}}
|
||||
async fetchChildren() {//{{{
|
||||
await this.node.fetchChildren()
|
||||
this.children_populated = true
|
||||
}//}}}
|
||||
render(force_update) {//{{{
|
||||
if (this.rendered && force_update !== true)
|
||||
return this
|
||||
|
||||
// Fetch the next level of children if the parent tree node is expanded and our children thus will be visible.
|
||||
const expanded = this.node.hasChildren() && this.sidebar.getNodeExpanded(this.node.UUID)
|
||||
|
||||
if (!this.children_populated && this.sidebar.getNodeExpanded(this.parent?.node.UUID)) {
|
||||
this.node.fetchChildren().then(() => this.children_populated = true)
|
||||
}
|
||||
|
||||
// Update the name and selected status
|
||||
this.elName.querySelector('span').innerText = this.node.get('Name')
|
||||
|
||||
if (this.sidebar.isSelected(this.node))
|
||||
this.elName.classList.add('selected')
|
||||
else
|
||||
this.elName.classList.remove('selected')
|
||||
|
||||
// Update expansion state
|
||||
if (expanded) {
|
||||
this.elChildren.classList.add('expanded')
|
||||
this.elChildren.classList.remove('collapsed')
|
||||
} else {
|
||||
this.elChildren.classList.remove('expanded')
|
||||
this.elChildren.classList.add('collapsed')
|
||||
}
|
||||
|
||||
// The expand icon <img> is only changed to not get a flickering when re-rendering.
|
||||
if (this.node.UUID === ROOT_NODE)
|
||||
this.setImgSrc(this.elExpand, `/images/${window._VERSION}/icon_home.svg`)
|
||||
else if (!this.node.hasChildren())
|
||||
this.setImgSrc(this.elExpand, `/images/${window._VERSION}/leaf.svg`)
|
||||
else if (this.sidebar.getNodeExpanded(this.node.UUID))
|
||||
this.setImgSrc(this.elExpand, `/images/${window._VERSION}/expanded.svg`)
|
||||
else
|
||||
this.setImgSrc(this.elExpand, `/images/${window._VERSION}/collapsed.svg`)
|
||||
|
||||
// Should children be rendered?
|
||||
this.elChildren.innerHTML = ''
|
||||
let children = []
|
||||
if (expanded)
|
||||
children = this.node.Children.map(node => {
|
||||
let treenode = this.sidebar.treeNodeComponents[node.UUID]
|
||||
if (treenode === undefined) {
|
||||
treenode = new N2TreeNode(this.sidebar, node, this)
|
||||
this.sidebar.treeNodeComponents[node.UUID] = treenode
|
||||
_mbus.dispatch(`NODE_COMPONENT_EXIST_${node.UUID}`)
|
||||
}
|
||||
return treenode
|
||||
})
|
||||
|
||||
for (const c of children)
|
||||
this.elChildren.appendChild(c.render())
|
||||
|
||||
this.rendered = true
|
||||
return this
|
||||
}//}}}
|
||||
|
||||
setImgSrc(img, newSrc) {// {{{
|
||||
if (img.getAttribute('src') === newSrc)
|
||||
return
|
||||
img.setAttribute('src', newSrc)
|
||||
}// }}}
|
||||
}
|
||||
customElements.define('n2-treenode', N2TreeNode)
|
||||
|
||||
// vim: foldmethod=marker
|
||||
Loading…
Add table
Add a link
Reference in a new issue