Function moveElementAwayFromCollision

src/core/layout.ts:365–465

(
  layout: Layout,
  collidesWith: LayoutItem,
  itemToMove: LayoutItem,
  isUserAction: boolean | undefined,
  compactType: CompactType,
  cols: number
)

 * @returns Updated layout
 */
export function moveElementAwayFromCollision(
  layout: Layout,
  collidesWith: LayoutItem,
  itemToMove: LayoutItem,
  isUserAction: boolean | undefined,
  compactType: CompactType,
  cols: number
): LayoutItem[] {
  const compactH = compactType === "horizontal";
  const compactV = compactType === "vertical";
  const preventCollision = collidesWith.static;

  // Try to move up/left first (only on primary collision from user action)
  if (isUserAction) {
    isUserAction = false; // Only try this once

    // Create a fake item to test if there's room above/left
    const fakeItem: LayoutItem = {
      x: compactH ? Math.max(collidesWith.x - itemToMove.w, 0) : itemToMove.x,
      y: compactV ? Math.max(collidesWith.y - itemToMove.h, 0) : itemToMove.y,
      w: itemToMove.w,
      h: itemToMove.h,
      i: "-1"
    };

    const firstCollision = getFirstCollision(layout, fakeItem);
    const collisionNorth =
      firstCollision !== undefined &&
      firstCollision.y + firstCollision.h > collidesWith.y;
    const collisionWest =
      firstCollision !== undefined &&
      collidesWith.x + collidesWith.w > firstCollision.x;

    // No collision above/left - we can move there
    if (!firstCollision) {
      return moveElement(
        layout,
        itemToMove,
        compactH ? fakeItem.x : undefined,
        compactV ? fakeItem.y : undefined,
        isUserAction,
        preventCollision,
        compactType,
        cols
      );
    }

    // Handle specific collision cases
    if (collisionNorth && compactV) {
      return moveElement(
        layout,
        itemToMove,
        undefined,
        itemToMove.y + 1,
        isUserAction,
        preventCollision,
        compactType,
        cols