Immediately show snapped/unsnapped measuring result when pressing/releasing shift

src/main.js

@@ -111,14 +111,17 @@ function hookKeyboardManagerFunctions() {
 }
 
 function handleKeys(event, key, up) {
-	if (up || event.repeat || this.hasFocus)
+	if (event.repeat || this.hasFocus)
 		return false
 
-	if (key.toLowerCase() === "x") return onKeyDownX()
+	if (key.toLowerCase() === "x") return onKeyX(up)
+	if (key.toLowerCase() === "shift") return onKeyShift(up)
 	return false
 }
 
-function onKeyDownX() {
+function onKeyX(up) {
+	if (up)
+		return false
 	if (!canvas.controls.ruler.isDragRuler)
 		return false
 
@@ -126,6 +129,16 @@ function onKeyDownX() {
 	return true
 }
 
+function onKeyShift(up) {
+	if (!canvas.controls.ruler.isDragRuler)
+		return false
+
+	const mousePosition = canvas.app.renderer.plugins.interaction.mouse.getLocalPosition(canvas.tokens)
+	const rulerOffset = canvas.controls.ruler.rulerOffset
+	const measurePosition = {x: mousePosition.x + rulerOffset.x, y: mousePosition.y + rulerOffset.y}
+	canvas.controls.ruler.measure(measurePosition, {snap: up})
+}
+
 function onTokenLeftDragStart(event) {
 	canvas.controls.ruler.draggedToken = this
 	const tokenCenter = {x: this.x + canvas.grid.grid.w / 2, y: this.y + canvas.grid.grid.h / 2}