1 files changed, 18 insertions, 0 deletions

diff --git a/src/client/views/collections/collectionSchema/CollectionSchemaMovableColumn.tsx b/src/client/views/collections/collectionSchema/CollectionSchemaMovableColumn.tsx
index 456c38c68..2df95ffd8 100644
--- a/src/client/views/collections/collectionSchema/CollectionSchemaMovableColumn.tsx
+++ b/src/client/views/collections/collectionSchema/CollectionSchemaMovableColumn.tsx
@@ -21,27 +21,38 @@ export interface MovableColumnProps {
     ScreenToLocalTransform: () => Transform;
 }
 export class MovableColumn extends React.Component<MovableColumnProps> {
+    // The header of the column
     private _header?: React.RefObject<HTMLDivElement> = React.createRef();
+    // The container of the function that is responsible for moving the column over to a new plac
     private _colDropDisposer?: DragManager.DragDropDisposer;
+    // initial column position
     private _startDragPosition: { x: number, y: number } = { x: 0, y: 0 };
+    // sensitivity to being dragged, in pixels
     private _sensitivity: number = 16;
+    // Column reference ID
     private _dragRef: React.RefObject<HTMLDivElement> = React.createRef();
 
     onPointerEnter = (e: React.PointerEvent): void => {
+        // if the column is left-clicked and it is being dragged
         if (e.buttons === 1 && SnappingManager.GetIsDragging()) {
             this._header!.current!.className = "collectionSchema-col-wrapper";
             document.addEventListener("pointermove", this.onDragMove, true);
         }
     }
+
     onPointerLeave = (e: React.PointerEvent): void => {
         this._header!.current!.className = "collectionSchema-col-wrapper";
         document.removeEventListener("pointermove", this.onDragMove, true);
         !e.buttons && document.removeEventListener("pointermove", this.onPointerMove);
     }
+
     onDragMove = (e: PointerEvent): void => {
+        // only take into account the horizonal direction when a column is dragged
         const x = this.props.ScreenToLocalTransform().transformPoint(e.clientX, e.clientY);
         const rect = this._header!.current!.getBoundingClientRect();
+        // Now store the point at the top center of the column when it was in its original position
         const bounds = this.props.ScreenToLocalTransform().transformPoint(rect.left + ((rect.right - rect.left) / 2), rect.top);
+        // to be compared with its new horizontal position
         const before = x[0] < bounds[0];
         this._header!.current!.className = "collectionSchema-col-wrapper";
         if (before) this._header!.current!.className += " col-before";
@@ -58,11 +69,15 @@ export class MovableColumn extends React.Component<MovableColumnProps> {
 
     colDrop = (e: Event, de: DragManager.DropEvent) => {
         document.removeEventListener("pointermove", this.onDragMove, true);
+        // we only care about whether the column is shifted to the side
         const x = this.props.ScreenToLocalTransform().transformPoint(de.x, de.y);
+        // get the dimensions of the smallest rectangle that bounds the header
         const rect = this._header!.current!.getBoundingClientRect();
         const bounds = this.props.ScreenToLocalTransform().transformPoint(rect.left + ((rect.right - rect.left) / 2), rect.top);
+        // get whether the column was dragged before or after where it is now
         const before = x[0] < bounds[0];
         const colDragData = de.complete.columnDragData;
+        // if there is colDragData, which happen when the drag is complete, reorder the columns according to the established variables
         if (colDragData) {
             e.stopPropagation();
             this.props.reorderColumns(colDragData.colKey, this.props.columnValue, before, this.props.allColumns);
@@ -85,8 +100,10 @@ export class MovableColumn extends React.Component<MovableColumnProps> {
             document.removeEventListener("pointermove", onRowMove);
             document.removeEventListener('pointerup', onRowUp);
         };
+        // if the left mouse button is the one being held
         if (e.buttons === 1) {
             const [dx, dy] = this.props.ScreenToLocalTransform().transformDirection(e.clientX - this._startDragPosition.x, e.clientY - this._startDragPosition.y);
+            // If the movemnt of the drag exceeds the sensitivity value
             if (Math.abs(dx) + Math.abs(dy) > this._sensitivity) {
                 document.removeEventListener("pointermove", this.onPointerMove);
                 e.stopPropagation();
@@ -105,6 +122,7 @@ export class MovableColumn extends React.Component<MovableColumnProps> {
     onPointerDown = (e: React.PointerEvent, ref: React.RefObject<HTMLDivElement>) => {
         this._dragRef = ref;
         const [dx, dy] = this.props.ScreenToLocalTransform().transformDirection(e.clientX, e.clientY);
+        // If the cell thing dragged is not being edited
         if (!(e.target as any)?.tagName.includes("INPUT")) {
             this._startDragPosition = { x: dx, y: dy };
             document.addEventListener("pointermove", this.onPointerMove);