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/**
* @file
* Positioning extensions for dialogs.
*/
/**
* Triggers when content inside a dialog changes.
*
* @event dialogContentResize
*/
(function ($, Drupal, drupalSettings, debounce, displace) {
'use strict';
// autoResize option will turn off resizable and draggable.
drupalSettings.dialog = $.extend({autoResize: true, maxHeight: '95%'}, drupalSettings.dialog);
/**
* Resets the current options for positioning.
*
* This is used as a window resize and scroll callback to reposition the
* jQuery UI dialog. Although not a built-in jQuery UI option, this can
* be disabled by setting autoResize: false in the options array when creating
* a new {@link Drupal.dialog}.
*
* @function Drupal.dialog~resetSize
*
* @param {jQuery.Event} event
*
* @fires event:dialogContentResize
*/
function resetSize(event) {
var positionOptions = ['width', 'height', 'minWidth', 'minHeight', 'maxHeight', 'maxWidth', 'position'];
var adjustedOptions = {};
var windowHeight = $(window).height();
var option;
var optionValue;
var adjustedValue;
for (var n = 0; n < positionOptions.length; n++) {
option = positionOptions[n];
optionValue = event.data.settings[option];
if (optionValue) {
// jQuery UI does not support percentages on heights, convert to pixels.
if (typeof optionValue === 'string' && /%$/.test(optionValue) && /height/i.test(option)) {
// Take offsets in account.
windowHeight -= displace.offsets.top + displace.offsets.bottom;
adjustedValue = parseInt(0.01 * parseInt(optionValue, 10) * windowHeight, 10);
// Don't force the dialog to be bigger vertically than needed.
if (option === 'height' && event.data.$element.parent().outerHeight() < adjustedValue) {
adjustedValue = 'auto';
}
adjustedOptions[option] = adjustedValue;
}
}
}
// Offset the dialog center to be at the center of Drupal.displace.offsets.
adjustedOptions = resetPosition(adjustedOptions);
event.data.$element
.dialog('option', adjustedOptions)
.trigger('dialogContentResize');
}
/**
* Position the dialog's center at the center of displace.offsets boundaries.
*
* @function Drupal.dialog~resetPosition
*
* @param {object} options
*
* @return {object}
*/
function resetPosition(options) {
var offsets = displace.offsets;
var left = offsets.left - offsets.right;
var top = offsets.top - offsets.bottom;
var leftString = (left > 0 ? '+' : '-') + Math.abs(Math.round(left / 2)) + 'px';
var topString = (top > 0 ? '+' : '-') + Math.abs(Math.round(top / 2)) + 'px';
options.position = {
my: 'center' + (left !== 0 ? leftString : '') + ' center' + (top !== 0 ? topString : ''),
of: window
};
return options;
}
$(window).on({
'dialog:aftercreate': function (event, dialog, $element, settings) {
var autoResize = debounce(resetSize, 20);
var eventData = {settings: settings, $element: $element};
if (settings.autoResize === true || settings.autoResize === 'true') {
$element
.dialog('option', {resizable: false, draggable: false})
.dialog('widget').css('position', 'fixed');
$(window)
.on('resize.dialogResize scroll.dialogResize', eventData, autoResize)
.trigger('resize.dialogResize');
$(document).on('drupalViewportOffsetChange', eventData, autoResize);
}
},
'dialog:beforeclose': function (event, dialog, $element) {
$(window).off('.dialogResize');
}
});
})(jQuery, Drupal, drupalSettings, Drupal.debounce, Drupal.displace);
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