No functional change.

Reduce potential merge conflicts w/ rooklift#248

files/src/renderer/50_table.js

@@ -24,14 +24,13 @@ const table_prototype = {
 		this.already_autopopulated = false;
 	},
 
-	get_cp: function() {
+	get_cp_details: function() {
 		let info = SortedMoveInfoFromTable(this)[0];
 		if (info && !info.__ghost && info.__touched && (this.nodes > 1 || this.limit === 1)) {
-			if (info.board.active === "b") {
-				return -info.cp;
-			} else {
-				return info.cp;
-			}
+			let return_cp = ((info.board.active === "b") ? (-info.cp) : (info.cp));
+			return {
+				'cp': return_cp
+			};
 		} else {
 			return null;
 		}
@@ -41,18 +40,17 @@ const table_prototype = {
 
 		// Naphthalin's scheme: based on centipawns.
 
-		if (this.graph_y_version === this.version) {
-			return this.graph_y;
-		} else {
-			let cp = this.get_cp();
-			if (cp !== null) {
+		if (this.graph_y_version !== this.version) {
+			let engine_info_graph_details = this.get_cp_details();
+			if (engine_info_graph_details !== null) {
+				let cp = engine_info_graph_details.cp;
 				this.graph_y = 1 / (1 + Math.pow(0.5, cp / 100));
 			} else {
 				this.graph_y = null;
 			}
 			this.graph_y_version = this.version;
-			return this.graph_y;
 		}
+		return this.graph_y;
 	},
 
 	set_terminal_info: function(reason, ev) {	// ev is ignored if reason is "" (i.e. not a terminal position)

files/src/renderer/72_tree_draw.js

@@ -165,9 +165,12 @@ let tree_draw_props = {
 	// Helpers...
 
 	underline_html_classlist: function (eval_node, dom_classlist) {
-		let eval_node_cp = eval_node.table.get_cp();
-		let eval_parentnode_cp = eval_node.parent.table.get_cp();
-		if ( ((typeof eval_node_cp) == 'number') && ((typeof eval_parentnode_cp) == 'number') ) {
+		let eval_node_details = eval_node.table.get_cp_details();
+		let eval_parentnode_details = eval_node.parent.table.get_cp_details();
+		if (
+			((typeof eval_node_details) == 'object') && ((typeof eval_parentnode_details) == 'object') &&
+			((typeof eval_node_details.cp) == 'number') && ((typeof eval_parentnode_details.cp) == 'number')
+		) {
 			if ((dom_classlist.length > 0) && (dom_classlist instanceof DOMTokenList)) {
 				// NOTE: we don't need to `.remove` when `dom_classlist instanceof Array` because
 				// dom_from_scratch is recreating elements from the ground up (they won't have classes we need to remove)
@@ -176,6 +179,9 @@ let tree_draw_props = {
 				dom_classlist.remove('underline-blunder');
 			}
 
+			let eval_node_cp = eval_node_details.cp;
+			let eval_parentnode_cp = eval_parentnode_details.cp;
+
 			let clamped_eval_node_cp = Math.min(Math.max(eval_node_cp, -250), 250);
 			let clamped_eval_parentnode_cp = Math.min(Math.max(eval_parentnode_cp, -250), 250);
 			let clamped_delta_centipawns = Math.abs(clamped_eval_node_cp - clamped_eval_parentnode_cp);