Added navigation to top/bottom, normalized toplevel node parent to root node

static/js/node.mjs

@@ -336,7 +336,13 @@ export class Node {
 		this.data = nodeData
 
 		this.UUID = nodeData.UUID
-		this.ParentUUID = nodeData.ParentUUID
+
+		// Toplevel nodes are normalized to have the ROOT_NODE as parent.
+		if (nodeData.UUID !== ROOT_NODE && nodeData.ParentUUID === '') {
+			this.ParentUUID = ROOT_NODE
+			this.data.ParentUUID = ROOT_NODE
+		} else
+			this.ParentUUID = nodeData.ParentUUID
 
 		this._children_fetched = false
 		this.Children = []

static/js/node_store.mjs

@@ -222,11 +222,9 @@ export class NodeStore {
 	}//}}}
 	async getTreeNodes(parent, newLevel) {//{{{
 		return new Promise((resolve, reject) => {
-			// Parent of toplevel nodes is '' in indexedDB,
-			// but can also be set to the ROOT_NODE uuid.
+			// Parent of toplevel nodes is ROOT_NODE in indexedDB.
+			// Only the root node has '' as parent.
 			let storeParent = parent
-			if (parent === ROOT_NODE)
-				storeParent = ''
 
 			const trx = this.db.transaction('nodes', 'readonly')
 			const nodeStore = trx.objectStore('nodes')
@@ -305,7 +303,7 @@ export class NodeStore {
 				.transaction('nodes', 'readonly')
 				.objectStore('nodes')
 
-			if (node.ParentUUID === '') {
+			if (node.ParentUUID === ROOT_NODE) {
 				resolve(accumulated)
 				return
 			}

static/js/notes2.mjs

@@ -123,7 +123,7 @@ class Tree extends Component {
 					// The root node isn't supposed to be shown in the tree.
 					if (node.UUID === ROOT_NODE)
 						continue
-					if (node.ParentUUID === '')
+					if (node.ParentUUID === ROOT_NODE)
 						this.treeTrunk.push(node)
 				}
 				this.forceUpdate()
@@ -203,6 +203,16 @@ class Tree extends Component {
 				this.setNodeExpanded(n.UUID, !expanded)
 				break
 
+			case 'g':
+			case 'Home':
+				this.navigateTop()
+				break
+
+			case 'G':
+			case 'End':
+				this.navigateBottom()
+				break
+
 			case 'j':
 			case 'ArrowDown':
 				await this.navigateDown(this.selectedNode)
@@ -234,6 +244,9 @@ class Tree extends Component {
 		}
 	}//}}}
 	async navigateLeft(n) {//{{{
+		if (n === null)
+			return
+
 		const expanded = this.getNodeExpanded(n.UUID)
 		if (expanded && n.hasChildren()) {
 			this.setNodeExpanded(n.UUID, false)
@@ -256,6 +269,9 @@ class Tree extends Component {
 		await _notes2.current.goToNode(n.getSiblingBefore()?.UUID, true, true)
 	}//}}}
 	async navigateRight(n) {//{{{
+		if (n === null)
+			return
+
 		const siblingAfter = n.getSiblingAfter()
 		const expanded = this.getNodeExpanded(n.UUID)
 
@@ -278,6 +294,9 @@ class Tree extends Component {
 		await _notes2.current.goToNode(n.getSiblingAfter()?.UUID, true, true)
 	}//}}}
 	async navigateUp(n) {//{{{
+		if (n === null)
+			return
+
 		let parent = null
 		const siblingBefore = n.getSiblingBefore()
 		let siblingExpanded = false
@@ -303,14 +322,15 @@ class Tree extends Component {
 		}
 	}//}}}
 	async navigateDown(n) {//{{{
+		if (n === null)
+			return
+
 		const nodeExpanded = this.getNodeExpanded(n.UUID)
 
 		// Last node, not expanded, so it matters not whether it has children or not.
 		// Traverse upward to nearest parent with next sibling.
 		if (!nodeExpanded && n.isLastSibling()) {
 			const wantedNode = this.getParentWithNextSibling(n)
-			if (wantedNode?.UUID === ROOT_NODE)
-				return
 			await _notes2.current.goToNode(wantedNode?.UUID, true, true)
 			return
 		}
@@ -320,11 +340,10 @@ class Tree extends Component {
 			await _notes2.current.goToNode(wantedNode?.UUID, true, true)
 			return
 		}
+
 		// Node not expanded. Go to this node's next sibling.
 		// GoToNode will abort if given null.
 		if (!nodeExpanded || !n.hasChildren()) {
-			if (n.getSiblingAfter()?.UUID === ROOT_NODE)
-				return
 			await _notes2.current.goToNode(n.getSiblingAfter()?.UUID, true, true)
 			return
 		}
@@ -336,6 +355,26 @@ class Tree extends Component {
 			return
 		}
 	}//}}}
+	async navigateTop() {//{{{
+		const root = await nodeStore.get(ROOT_NODE)
+		if (root.Children.length === 0)
+			return
+		await _notes2.current.goToNode(root.Children[0]?.UUID, true, true)
+	}//}}}
+	async navigateBottom() {//{{{
+		const root = await nodeStore.get(ROOT_NODE)
+		if (root.Children.length === 0)
+			return
+
+		const toplevel = root.Children[root.Children.length - 1]
+		const toplevelExpanded = this.getNodeExpanded(toplevel?.UUID)
+
+		if (toplevelExpanded) {
+			const lastnode = this.getLastExpandedNode(toplevel)
+			await _notes2.current.goToNode(lastnode?.UUID, true, true)
+		} else
+			await _notes2.current.goToNode(root.Children[root.Children.length - 1]?.UUID, true, true)
+	}//}}}
 }
 
 class TreeNode extends Component {