File: public/js/tinymce/src/themes/mobile/src/main/js/util/Rectangles.js

define(
  'tinymce.themes.mobile.util.Rectangles',

  [
    'ephox.katamari.api.Arr',
    'ephox.katamari.api.Fun',
    'ephox.sugar.api.node.Element',
    'ephox.sugar.api.search.Traverse',
    'ephox.sugar.api.selection.Awareness',
    'ephox.sugar.api.selection.Selection',
    'ephox.sugar.api.selection.WindowSelection'
  ],

  function (Arr, Fun, Element, Traverse, Awareness, Selection, WindowSelection) {
    var COLLAPSED_WIDTH = 2;

    var collapsedRect = function (rect) {
      return {
        left: rect.left,
        top: rect.top,
        right: rect.right,
        bottom: rect.bottom,
        width: Fun.constant(COLLAPSED_WIDTH),
        height: rect.height
      };
    };

    var toRect = function (rawRect) {
      return {
        left: Fun.constant(rawRect.left),
        top: Fun.constant(rawRect.top),
        right: Fun.constant(rawRect.right),
        bottom: Fun.constant(rawRect.bottom),
        width: Fun.constant(rawRect.width),
        height: Fun.constant(rawRect.height)
      };
    };

    var getRectsFromRange = function (range) {
      if (! range.collapsed) {
        return Arr.map(range.getClientRects(), toRect);
      } else {
        var start = Element.fromDom(range.startContainer);
        return Traverse.parent(start).bind(function (parent) {
          var selection = Selection.exact(start, range.startOffset, parent, Awareness.getEnd(parent));
          var optRect = WindowSelection.getFirstRect(range.startContainer.ownerDocument.defaultView, selection);
          return optRect.map(collapsedRect).map(Arr.pure);
        }).getOr([ ]);
      }
    };

    var getRectangles = function (cWin) {
      var sel = cWin.getSelection();
      // In the Android WebView for some reason cWin.getSelection returns undefined.
      // The undefined check it is to avoid throwing of a JS error.
      return sel !== undefined && sel.rangeCount > 0 ? getRectsFromRange(sel.getRangeAt(0)) : [ ];
    };

    return {
      getRectangles: getRectangles
    };
  }
);