dismiss_dialogs.js

/* This file is used to locate the div element of a web page that might contain
close buttons to dismiss a modal dialog */

// Does the element also have the middle element?
var checkInCenter = function(element) {
    var centerElement = document.elementFromPoint(window.innerWidth / 2, window.innerHeight / 2);
    return element.contains(centerElement);
};


// Given a list of elements, find one that has the largest z-index
var maxZindex = function(element_list) {
    var max = -99999999;
    var element;

    for (var i = 0; i < element_list.length; i++) {
        var zindex = window.getComputedStyle(element_list[i]).getPropertyValue('z-index');
        if (+zindex > +max) {
            max = zindex;
            element = element_list[i];
        }
    }

    return element;
};


// Given an element and a parent element (not necessarily immediate parent),
// this function returns true if none of the elements between itself and this
// parent have z-index values set to a value other than 'auto'
var domZindexCheck = function(element, parent_element) {
    if (element == parent_element) {
        return true;
    } else {
        var parent = element.parentElement;

        while (parent != parent_element) {
            if (window.getComputedStyle(parent).getPropertyValue('z-index') != 'auto') {
                return false;
            }

            parent = parent.parentElement;
        }

        return true;
    }
};


// Calls the above function on a list of elements and a given parent element
var getElementsForCheck = function(element_list, parent_element) {
    var result = [];

    for (var i = 0; i < element_list.length; i++) {
        if (domZindexCheck(element_list[i], parent_element)) {
            result.push(element_list[i]);
        }
    }

    return result;
};


// Returns a list of divs on the web page that are visible, have a non-static
// 'position' and a z-index set to not 'auto'
// Note that z-index values lose their meaning when position is set to static
// Only considers those divs with position z-index values
var getDivs = function() {
    var result = [];
    element_list = document.querySelectorAll('div');

    for (var i = 0; i < element_list.length; i++) {
        var element = element_list[i];
        var style = window.getComputedStyle(element);
        if (style == null)
          continue
        var display = style.getPropertyValue('display') != 'none';
        var visibility = style.getPropertyValue('visibility') == 'visible';
        var position = style.getPropertyValue('position') != 'static';
        var zindex = style.getPropertyValue('z-index');
        var inCenter = checkInCenter(element);

        if (display && visibility && position && zindex != 'auto' && +zindex > 0 && inCenter) {
            var height = element.offsetHeight;
            var width = element.offsetWidth;

            if (+height > 150 && +width > 150) {
                result.push(element);
            }
        }
    }

    return result;
};

// Repeatedly filter the list of divs as extracted above until we know it is
// the element on 'top'
var getPopupContainer = function() {
  var divs = getDivs();
  var parent = document.body;
  var element;

  while (divs.length != 0) {
      var elements = getElementsForCheck(divs, parent);

      if (elements.length == 0) {
          break;
      }

      element = maxZindex(elements);

      divs = divs.filter(x => x != element && element.contains(x))
      parent = element;
  }

  if (element && element.children.length == 1 && element.children[0].tagName.toLowerCase() == 'iframe') {
      element = element.children[0];
  }

  return element;
};

var closeDialog = function(element) {
  var closeElements = ['button', 'a', 'div', 'span', 'img', 'label'];
  var result = [];

  var doc = document;

  if (element.tagName.toLowerCase() === 'iframe') {
    doc = element.contentDocument;
    element = element.contentDocument;
  }

  for (var ce of closeElements) {
    var elements = getElementsByXPath('.//' + ce + '[@*[contains(.,\'close\') and not(contains(.,\'/\'))]]', element, doc);
    elements = elements.concat(getElementsByXPath('.//' + ce + '[@*[contains(.,\'Close\') and not(contains(.,\'/\'))]]', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[@*[contains(.,\'dismiss\') and not(contains(.,\'/\'))]]', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[@*[contains(.,\'Dismiss\') and not(contains(.,\'/\'))]]', element, doc));

    elements = elements.concat(getElementsByXPath('.//' + ce + '[text() = \'x\']', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[text() = \'X\']', element, doc));

    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'Agree\')]]', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'AGREE\')]]', element, doc));

    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'ENTER\')]]', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'Enter\')]]', element, doc));

    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'YES\')]]', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'Yes\')]]', element, doc));

    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'No \')]]', element, doc));
    elements = elements.concat(getElementsByXPath('.//' + ce + '[text()[contains(., \'NO \')]]', element, doc));

    result = result.concat(elements.filter(x => isShown(x) && (x.style.offsetHeight !== 0 || x.style.offsetWidth !== 0)));
  }

  result = result.filter(function(item, pos) { return result.indexOf(item)== pos; });

  result = parentRemoval(result, 'button');

  for (var r of result) {
    try {
      r.click();
    }
    catch (err) {

    }
  }
  return result.length;
};

function dismissDialog() {
  let popup = getPopupContainer();
  if (popup){
    return closeDialog(popup);
  }
  return 0;
}