@atlaskit/editor-plugin-selection-extension/dist/es2019/ui/getBoundingBoxFromSelection.js

editor-plugin-selection-extension plugin for @atlaskit/editor-core

/**
 * Calculates the bounding box coordinates of a text selection within an editor view.
 *
 * @param view - The editor view instance.
 * @param from - The starting position of the selection.
 * @param to - The ending position of the selection.
 * @param offset - Optional offset to adjust the top and bottom coordinates of the bounding box.
 * @returns An object containing the top, left, bottom, and right coordinates of the bounding box.
 */
export const getBoundingBoxFromSelection = (view, from, to, offset = {
  top: 0,
  bottom: 0
}) => {
  let top = Infinity,
    left = Infinity,
    bottom = -Infinity,
    right = -Infinity;

  // initial version
  for (let pos = from; pos <= to; pos++) {
    const coords = view.coordsAtPos(pos);
    top = Math.min(top, coords.top);
    left = Math.min(left, coords.left);
    bottom = Math.max(bottom, coords.bottom);
    right = Math.max(right, coords.right);
  }
  top = top - offset.top;
  bottom = bottom - offset.bottom;
  return {
    top,
    left,
    bottom,
    right
  };
};