Selecting history nodes

static/css/notes2.css

@@ -21,7 +21,8 @@ html {
 }
 
 button {
-	font-size: 1e m;
+	font-size: 1em;
+	padding: 4px 8px;
 }
 
 /* ------------------------------------- *
@@ -546,7 +547,7 @@ n2-pagehistory {
 		padding: 32px;
 		margin-bottom: 32px;
 		border-radius: 8px;
-		background-color: #f8f8f8;
+		background-color: #fafafa;
 
 		box-shadow:
 			rgba(0, 0, 0, 0.4) 0px 2px 4px,
@@ -585,44 +586,54 @@ n2-pagehistory {
 		gap: 1px;
 		border: 1px solid var(--line-color);
 
-		&>div>div {
+		n2-pagehistorynode>* {
 			padding: 8px 12px;
 			background-color: #fff;
 			white-space: nowrap;
+		}
 
-			&.index {
+		n2-pagehistorynode {
+
+			&.selected .el-index:after  {
+				position: absolute;
+				left: -20px;
+
+				content: '>';
+				color: var(--color1);
+				font-weight: bold;
+				margin-right: 8px;
+			}
+
+			.el-index {
+				position: relative;
 				text-align: right;
 			}
 
-			&.updated {
+			.el-updated {
 				white-space: initial;
 			}
 
-			.date {
+			.el-date {
 				white-space: nowrap;
 				font-weight: bold;
 			}
 
-			.time {
+			.el-time {
 				white-space: nowrap;
 				color: #555;
 			}
 
-			&.name {
+			.el-name {
 				white-space: initial;
 				/*overflow-wrap: anywhere;*/
 				word-break: break-all;
 				color: var(--color1);
+			}
+		}
+	}
+}
 
-			}
+.el-pagination {
-		}
-
-		.history-node {
-			display: contents;
-		}
-	}
-
-	.el-pagination {
 	grid-column: 1 / -1;
 	margin-top: 16px;
 
@@ -642,5 +653,5 @@ n2-pagehistory {
 		padding: 8px 16px;
 		border-radius: 4px;
 	}
-	}
+}
 }

static/js/page_history.mjs

@@ -1,5 +1,7 @@
 import { CustomHTMLElement } from './lib/custom_html_element.mjs'
 import { Node } from './page_node.mjs'
+import { MarkedPosition } from './marked_position.mjs'
+
 
 export class N2PageHistory extends CustomHTMLElement {
 	static PAGESIZE = 15
@@ -47,11 +49,14 @@ export class N2PageHistory extends CustomHTMLElement {
 					<div data-el="next">&gt;</div>
 				</div>
 			</div>
+
+			<div data-el="markdown-content"></div>
 		`
 	}// }}}
 
 	constructor() {// {{{
 		super()
+		this.selectedNode = null
 
 		this.setAttribute('tabindex', '-1')
 		this.addEventListener('keydown', event => this.keyHandler(event))
@@ -72,6 +77,10 @@ export class N2PageHistory extends CustomHTMLElement {
 			await this.useNode(event.detail.data)
 			this.render()
 		})
+
+		_mbus.subscribe('HISTORY_NODE_SELECTED', (event) => {
+			this.selectedNode = event.detail.data.historyNode
+		})
 	}// }}}
 	async render(keepFetchHistoryProgress) {// {{{
 		this.elNodeName.innerText = this.node.get('Name')
@@ -88,24 +97,26 @@ export class N2PageHistory extends CustomHTMLElement {
 		let i = 0
 		let divs = nodes.map(n => {
 			i++
-
+			const index = 1 + this.nodesTotal - (N2PageHistory.PAGESIZE * (this.page - 1) + i)
-			const date = n.get('Updated').slice(0, 10)
+			const div = new N2PageHistoryNode(n, index)
-			const time = n.get('Updated').slice(11, 19)
+			div.render()
-
-			const div = document.createElement('div')
-			div.innerHTML = `
-				<div class="index">${1 + this.nodesTotal - (N2PageHistory.PAGESIZE * (this.page - 1) + i)}</div>
-				<div class="updated"><span class="date">${date}</span> <span class="time">${time}</span></div>
-				<div class="size">${this.formatSize(n.get('Content').length)}</div>
-				<div class="name">${n.get('Name')}</div>
-			`
-			div.classList.add('history-node')
 			return div
 		})
 		this.elNodes.replaceChildren(...divs)
 
 		if (!keepFetchHistoryProgress)
 			this.elFetchHistoryProgress.innerText = ''
+
+		// Select the first node.
+		if (!this.selectedNode) {
+			this.elNodes.firstElementChild?.select()
+		}
+
+		// Any selected history node is rendered with markdown.
+		/*
+		this.marked = new MarkedPosition()
+		this.elNodeMarkdown.innerHTML = this.marked.parse(this.elNodeContent.value)
+		*/
 	}// }}}
 
 	async useNode(node) {// {{{
@@ -124,18 +135,33 @@ export class N2PageHistory extends CustomHTMLElement {
 			case 'ArrowRight':
 				this.nextPage()
 				break
+			case 'ArrowUp':
+				const prevNode = this.selectedNode?.previousElementSibling
+				if (prevNode)
+					prevNode.select()
+				break
+			case 'ArrowDown':
+				const nextNode = this.selectedNode?.nextElementSibling
+				if (nextNode)
+					nextNode.select()
+				break
 		}
 	}// }}}
 
 	prevPage() {// {{{
 		if (this.page == 1)
 			return
+
+		// Selecting a node on another page is wrong.
+		this.selectedNode = null
 		this.page--
 		this.render()
 	}// }}}
 	nextPage() {// {{{
 		if (this.page >= this.pages)
 			return
+		// Selecting a node on another page is wrong.
+		this.selectedNode = null
 		this.page++
 		this.render()
 	}// }}}
@@ -199,6 +225,61 @@ export class N2PageHistory extends CustomHTMLElement {
 
 		return json
 	}// }}}
+}
+customElements.define('n2-pagehistory', N2PageHistory)
+
+
+class N2PageHistoryNode extends CustomHTMLElement {
+	static {// {{{
+		this.tmpl = document.createElement('template')
+		this.tmpl.innerHTML = `
+			<div data-el="index"></div>
+			<div data-el="updated"><span data-el="date"></span> <span data-el="time"></span></div>
+			<div data-el="size"></div>
+			<div data-el="name"></div>
+		`
+	}// }}}
+	constructor(node, index) {// {{{
+		super()
+
+		this.node = node
+		this.index = index
+
+		this.style.display = 'contents'
+		this.selected = false
+
+		this.addEventListener('click', () => this.select())
+
+		// Another history node has been selected.
+		_mbus.subscribe('HISTORY_NODE_SELECTED', (event) => {
+			if (this.node.get('Updated') == event.detail.data.historyNode.node.get('Updated'))
+				return
+			this.selected = false
+			this.render()
+		})
+	}// }}}
+
+	select() {// {{{
+		this.selected = true
+		// Other nodes are told to unselect and rerender.
+		_mbus.dispatch('HISTORY_NODE_SELECTED', { historyNode: this })
+		this.render()
+	}// }}}
+	render() {// {{{
+		const date = this.node.get('Updated').slice(0, 10)
+		const time = this.node.get('Updated').slice(11, 19)
+
+		if (this.selected)
+			this.classList.add('selected')
+		else
+			this.classList.remove('selected')
+
+		this.elIndex.innerText = this.index
+		this.elDate.innerText = date
+		this.elTime.innerText = time
+		this.elSize.innerText = this.node.get('Content').length
+		this.elName.innerText = this.node.get('Name')
+	}// }}}
 	formatSize(s) {// {{{
 		let div = 1
 		let unit = 'B'
@@ -215,4 +296,4 @@ export class N2PageHistory extends CustomHTMLElement {
 		}).format(Math.round(s / div)) + ' ' + unit
 	}// }}}
 }
-customElements.define('n2-pagehistory', N2PageHistory)
+customElements.define('n2-pagehistorynode', N2PageHistoryNode)