delete sibling / child nodes

50_tree.js

@@ -144,11 +144,10 @@ const node_prototype = {
 	detach: function() {
 
 		// Returns the node that the renderer should point to,
-		// which is either the parent (if there is one) or
-		// this node itself (if there isn't).
+		// which is the parent unless the call is a bad one.
 
 		let parent = this.parent;
-		if (!parent) return this;
+		if (!parent) return this;		// Fail
 
 		let new_list_for_parent = [];
 

95_renderer.js

@@ -238,7 +238,7 @@ function NewRenderer() {
 		this.movelist_handler.draw(this.node);
 	};
 
-	renderer.delete_move = function() {
+	renderer.delete_node = function() {
 
 		if (!this.node.parent) {
 			return;
@@ -251,6 +251,28 @@ function NewRenderer() {
 		this.position_changed();
 	};
 
+	renderer.delete_children = function() {
+		for (let child of this.node.children) {
+			child.detach();
+		}
+		this.movelist_handler.draw(this.node);
+	};
+
+	renderer.delete_siblings = function() {
+
+		if (!this.node.parent) {
+			return;
+		}
+
+		for (let sibling of this.node.parent.children) {
+			if (sibling !== this.node) {
+				sibling.detach();
+			}
+		}
+
+		this.movelist_handler.draw(this.node);
+	};
+
 	renderer.load_fen = function(s) {
 
 		if (s.trim() === this.node.get_board().fen()) {

main.js

@@ -300,10 +300,22 @@ function menu_build() {
 					type: "separator"
 				},
 				{
-					label: "Delete move",
+					label: "Delete node",
 					accelerator: "CommandOrControl+Backspace",
 					click: () => {
-						win.webContents.send("call", "delete_move");
+						win.webContents.send("call", "delete_node");
+					}
+				},
+				{
+					label: "Delete children",
+					click: () => {
+						win.webContents.send("call", "delete_children");
+					}
+				},
+				{
+					label: "Delete siblings",
+					click: () => {
+						win.webContents.send("call", "delete_siblings");
 					}
 				},
 				{