Fix script injection, small refactoring

js/input/DragMove.js

@@ -0,0 +1,42 @@
+import MouseClickDrag from "./MouseClickDrag"
+
+export default class DragMove extends MouseClickDrag {
+
+    constructor(target, blueprint, options) {
+        super(target, blueprint, options)
+        this.stepSize = parseInt(options?.stepSize)
+        this.mousePosition = [0, 0]
+    }
+
+    snapToGrid(location) {
+        return [
+            this.stepSize * Math.round(location[0] / this.stepSize),
+            this.stepSize * Math.round(location[1] / this.stepSize)
+        ]
+    }
+
+    startDrag() {
+        if (isNaN(this.stepSize) || this.stepSize <= 0) {
+            this.stepSize = parseInt(getComputedStyle(this.target).getPropertyValue("--ueb-grid-snap"))
+            if (isNaN(this.stepSize) || this.stepSize <= 0) {
+                this.stepSize = 1
+            }
+        }
+        // Get the current mouse position
+        this.mousePosition = this.stepSize != 1 ? this.snapToGrid(this.clickedPosition) : this.clickedPosition
+    }
+
+    dragTo(location, movement) {
+        const mousePosition = this.stepSize != 1 ? this.snapToGrid(location) : location
+        const d = [mousePosition[0] - this.mousePosition[0], mousePosition[1] - this.mousePosition[1]]
+
+        if (d[0] == 0 && d[1] == 0) {
+            return
+        }
+
+        this.target.dispatchDragEvent(d)
+
+        // Reassign the position of mouse
+        this.mousePosition = mousePosition
+    }
+}