Abort the drag when pressing ESC (resolves #73)

src/main.js

@@ -119,6 +119,7 @@ function handleKeys(event, key, up) {
 	if (lowercaseKey === "x") return onKeyX(up)
 	if (lowercaseKey === "shift") return onKeyShift(up)
 	if (lowercaseKey === "space") return onKeySpace(up);
+	if (lowercaseKey === "escape") return onKeyEscape(up);
 	return false
 }
 
@@ -160,13 +161,22 @@ function onKeySpace(up) {
 
 	if (!up) {
 		if (swapSpacebarRightClick)
-			ruler.dragRulerDeleteWaypoint();
+			ruler.dragRulerAbortDrag();
 		else
 			startDragRuler.call(ruler.draggedEntity, options);
 	}
 	return true;
 }
 
+function onKeyEscape(up) {
+	const ruler = canvas.controls.ruler;
+	if (!ruler.draggedEntity)
+		return false;
+	if (!up)
+		ruler.dragRulerAbortDrag();
+	return true;
+}
+
 function onEntityLeftDragStart(event) {
 	const isToken = this instanceof Token;
 	const ruler = canvas.controls.ruler

src/ruler.js

@@ -110,6 +110,11 @@ export class DragRulerRuler extends Ruler {
 			game.user.broadcastActivity({ruler: this});
 		}
 		else {
+			this.dragRulerAbortDrag(event);
+		}
+	}
+
+	dragRulerAbortDrag(event={preventDefault: () => {return}}) {
 		const token = this.draggedEntity;
 		this._endMeasurement();
 
@@ -121,7 +126,6 @@ export class DragRulerRuler extends Ruler {
 		// Pass in a fake event that hopefully is enough to allow other modules to function
 		token._onDragLeftCancel(event);
 	}
-	}
 
 	async dragRulerRecalculate(tokenIds) {
 		if (this._state !== Ruler.STATES.MEASURING)