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Editing File: /home/maglabs/it/app/code/Magento/Widget/view/adminhtml/templates/instance/edit/layout.phtml

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

/** @var \Magento\Widget\Block\Adminhtml\Widget\Instance\Edit\Tab\Main\Layout $block */
/** @var \Magento\Framework\Escaper $escaper */
/** @var \Magento\Framework\View\Helper\SecureHtmlRenderer $secureRenderer */

?>
<fieldset class="fieldset">
    <legend class="legend"><span><?= $escaper->escapeHtml(__('Layout Updates')) ?></span></legend>
    <br />
    <div class="widget-layout-updates">
        <div id="page_group_container"></div>
        <div class="actions"><?= $block->getAddLayoutButtonHtml() ?></div>
    </div>
</fieldset>
<?php
/** @var \Magento\Framework\Json\Helper\Data $jsonHelper */
$jsonHelper = $block->getData('jsonHelper');
$scriptString = <<<script

require([
    'jquery',
    'mage/template',
    'Magento_Ui/js/modal/alert',
    "prototype",
    "jquery/jstree/jquery.jstree"
], function (jQuery, mageTemplate, alert) {

//<![CDATA[

var pageGroupTemplate = '<div class="fieldset-wrapper page_group_container" id="page_group_container_<%- data.id %>">'+
    '<div class="fieldset-wrapper-title">'+
        '<label for="widget_instance[<%- data.id %>][page_group]">Display on <span class="required">*</span></label>'+
        '{$block->getDisplayOnSelectHtml()}'+
        '<div class="actions">'+
            '<button title="{$escaper->escapeHtmlAttr(__('Remove Layout Update'))}" type="button"'+
            '    class="action-default scalable action-delete" onclick="WidgetInstance.removePageGroup(this)" />'+
        '</div>'+
    '</div>'+
    '<div class="fieldset-wrapper-content">'+

script;
foreach ($block->getDisplayOnContainers() as $container):
    $scriptString .= <<<script
    '<div class="no-display {$escaper->escapeJs($container['code'])} group_container" '+
        'id="{$escaper->escapeJs($container['name'])}_<%- data.id %>">'+
        '<input disabled="disabled" type="hidden" class="container_name" name="__[container_name]" '+
        'value="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}]" />'+
        '<input disabled="disabled" type="hidden" '+
        'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][page_id]" '+
        'value="<%- data.page_id %>" />'+
        '<input disabled="disabled" type="hidden" class="layout_handle_pattern" '+
        'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][layout_handle]" '+
        'value="{$escaper->escapeJs($container['layout_handle'])}" />'+
        '<table class="data-table">'+
            '<col width="200" />'+
            '<thead>'+
                '<tr>'+
                    '<th><label>{$escaper->escapeJs(__('%1', $container['label']))}</label></th>'+
                    '<th><label>{$escaper->escapeJs(__('Container'))} <span class="required">*</span></label></th>'+
                    '<th><label>{$escaper->escapeJs(__('Template'))}</label></th>'+
                '</tr>'+
            '</thead>'+
            '<tbody>'+
                '<tr>'+
                    '<td>'+
                        '<input disabled="disabled" type="radio" class="radio for_all" '+
                        'id="all_{$escaper->escapeJs($container['name'])}_<%- data.id %>" '+
                        'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][for]" '+
                        'value="all" checked="checked" />&nbsp;'+
                        '<label for="all_{$escaper->escapeJs($container['name'])}_<%- data.id %>">'+
                        '{$escaper->escapeJs(__('All'))}</label><br />'+
                        '<input disabled="disabled" type="radio" class="radio for_specific" '+
                        'id="specific_{$escaper->escapeJs($container['name'])}_<%- data.id %>" '+
                        'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][for]" '+
                        'value="specific" />&nbsp;'+
                        '<label for="specific_{$escaper->escapeJs($container['name'])}_<%- data.id %>">'+
                        '{$escaper->escapeJs(__('Specific %1', $container['label']))}</label>'+

script;

$scriptString1 = $secureRenderer->renderEventListenerAsTag(
        "onclick",
        "WidgetInstance.togglePageGroupChooser(this)",
        "#all_" . $escaper->escapeJs($container['name']) . "_<%- data.id %>"
    );
    $scriptString .= "'" . $escaper->escapeJs($scriptString1) . "'+" . PHP_EOL;

$scriptString1 = $secureRenderer->renderEventListenerAsTag(
        "onclick",
        "WidgetInstance.togglePageGroupChooser(this)",
        "#specific_" . $escaper->escapeJs($container['name']) . "_<%- data.id %>"
    );
    $scriptString .= "'" . $escaper->escapeJs($scriptString1) . "'+" . PHP_EOL;

$scriptString .= <<<script
                    '</td>'+
                    '<td>'+
                        '<div class="block_reference_container">'+
                            '<div class="block_reference"></div>'+
                        '</div>'+
                    '</td>'+
                    '<td>'+
                        '<div class="block_template_container">'+
                            '<div class="block_template"></div>'+
                        '</div>'+
                    '</td>'+
                '</tr>'+
            '</tbody>'+
        '</table>'+
        '<div class="no-display chooser_container" id="{$escaper->escapeJs($container['name'])}_ids_<%- data.id %>">'+
            '<input disabled="disabled" type="hidden" class="is_anchor_only" '+
            'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][is_anchor_only]" '+
            'value="{$escaper->escapeJs($container['is_anchor_only'])}" />'+
            '<input disabled="disabled" type="hidden" class="product_type_id" '+
            'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][product_type_id]" '+
            'value="{$escaper->escapeJs($container['product_type_id'])}" />'+
            '<p>' +
                '<input disabled="disabled" type="text" class="input-text entities" '+
                'name="widget_instance[<%- data.id %>][{$escaper->escapeJs($container['name'])}][entities]" '+
                'value="<%- data.{$escaper->escapeJs($container['name'])}_entities %>" readonly="readonly" />&nbsp;' +
                '<a class="widget-option-chooser" href="#" '+
                'title="{$escaper->escapeJs(__('Open Chooser'))}">' +
                    '<img src="{$escaper->escapeJs(
                        $escaper->escapeUrl($block->getViewFileUrl('images/rule_chooser_trigger.gif'))
                    )}" '+
                    'alt="{$escaper->escapeJs(__('Open Chooser'))}" />' +
                '</a>&nbsp;' +
                '<a id="widget-apply-<%- data.id %>" href="#" '+
                'title="{$escaper->escapeJs(__('Apply'))}">' +
                    '<img src="{$escaper->escapeJs(
                        $escaper->escapeUrl($block->getViewFileUrl('images/rule_component_apply.gif'))
                    )}" '+
                    'alt="{$escaper->escapeJs(__('Apply'))}" />' +
                '</a>' +
            '</p>'+
            '<div class="chooser"></div>'+
        '</div>'+

script;

$scriptString1 = $secureRenderer->renderEventListenerAsTag(
        "onclick",
        "event.preventDefault();
        WidgetInstance.displayEntityChooser('" .$escaper->escapeJs($container['code']) .
        "', '" . $escaper->escapeJs($container['name']) . "_ids_<%- data.id %>')",
        "div#" . $escaper->escapeJs($container['name']) . "_ids_<%- data.id %> a.widget-option-chooser"
    );
    $scriptString .= "'" . $escaper->escapeJs($scriptString1) . "'+" . PHP_EOL;

$scriptString1 = $secureRenderer->renderEventListenerAsTag(
        'onclick',
        "event.preventDefault();
        WidgetInstance.hideEntityChooser('" . $escaper->escapeJs($container['name']) . "_ids_<%- data.id %>')",
        "a#widget-apply-<%- data.id %>"
    );
    $scriptString .= "'" . $escaper->escapeJs($scriptString1) . "'+" . PHP_EOL;
    $scriptString .= <<<script

'</div>'+

script;
endforeach;
$scriptString .= <<<script

'<div class="no-display all_pages group_container" id="all_pages_<%- data.id %>">'+
    '<input disabled="disabled" type="hidden" class="container_name" name="__[container_name]" '+
    'value="widget_instance[<%- data.id %>][all_pages]" />'+
    '<input disabled="disabled" type="hidden" name="widget_instance[<%- data.id %>][all_pages][page_id]" '+
    'value="<%- data.page_id %>" />'+
    '<input disabled="disabled" type="hidden" class="layout_handle_pattern" '+
    'name="widget_instance[<%- data.id %>][all_pages][layout_handle]" value="default" />'+
    '<input disabled="disabled" type="hidden" class="for_all" name="widget_instance[<%- data.id %>][all_pages][for]" '+
    'value="all" />'+
    '<table class="data-table">'+
        '<col width="200" />'+
        '<thead>'+
            '<tr>'+
                '<th><label>{$escaper->escapeJs(__('Container'))} <span class="required">*</span></label></th>'+
                '<th><label>{$escaper->escapeJs(__('Template'))}</label></th>'+
                '<th>&nbsp;</th>'+
            '</tr>'+
        '</thead>'+
        '<tbody>'+
            '<tr>'+
                '<td>'+
                    '<div class="block_reference_container">'+
                        '<div class="block_reference"></div>'+
                    '</div>'+
                '</td>'+
                '<td>'+
                    '<div class="block_template_container">'+
                        '<div class="block_template"></div>'+
                    '</div>'+
                '</td>'+
                '<td>&nbsp;</td>'+
            '</tr>'+
        '</tbody>'+
    '</table>'+
'</div>'+
'<div class="no-display ignore-validate pages group_container" id="pages_<%- data.id %>">'+
    '<input disabled="disabled" type="hidden" class="container_name" name="__[container_name]" '+
    'value="widget_instance[<%- data.id %>][pages]" />'+
    '<input disabled="disabled" type="hidden" name="widget_instance[<%- data.id %>][pages][page_id]" '+
    'value="<%- data.page_id %>" />'+
    '<input disabled="disabled" type="hidden" class="for_all" name="widget_instance[<%- data.id %>][pages][for]" '+
    'value="all" />'+
    '<table class="data-table">'+
        '<col width="200" />'+
        '<thead>'+
            '<tr>'+
                '<th><label>{$escaper->escapeJs(__('Page'))} <span class="required">*</span></label></th>'+
                '<th><label>{$escaper->escapeJs(__('Container'))} <span class="required">*</span></label></th>'+
                '<th><label>{$escaper->escapeJs(__('Template'))}</label></th>'+
            '</tr>'+
        '</thead>'+
        '<tbody>'+
            '<tr>'+
                '<td>{$block->getLayoutsChooser()}</td>'+
                '<td>'+
                    '<div class="block_reference_container">'+
                        '<div class="block_reference"></div>'+
                    '</div>'+
                '</td>'+
                '<td>'+
                    '<div class="block_template_container">'+
                        '<div class="block_template"></div>'+
                    '</div>'+
                '</td>'+
                '<td>&nbsp;</td>'+
            '</tr>'+
        '</tbody>'+
    '</table>'+
'</div>'+
'<div class="no-display ignore-validate pages group_container" id="page_layouts_<%- data.id %>">'+
    '<input disabled="disabled" type="hidden" class="container_name" name="__[container_name]" '+
    'value="widget_instance[<%- data.id %>][page_layouts]" />'+
    '<input disabled="disabled" type="hidden" name="widget_instance[<%- data.id %>][page_layouts][page_id]" '+
    'value="<%- data.page_id %>" />'+
    '<input disabled="disabled" type="hidden" class="for_all" '+
    'name="widget_instance[<%- data.id %>][page_layouts][for]" value="all" />'+
    '<table class="data-table">'+
        '<col width="200" />'+
        '<thead>'+
            '<tr>'+
                '<th><label>{$escaper->escapeJs(__('Page'))} <span class="required">*</span></label></th>'+
                '<th><label>{$escaper->escapeJs(__('Container'))} <span class="required">*</span></label></th>'+
                '<th><label>{$escaper->escapeJs(__('Template'))}</label></th>'+
            '</tr>'+
        '</thead>'+
        '<tbody>'+
            '<tr>'+
                '<td>{$block->getPageLayoutsPageChooser()}</td>'+
                '<td>'+
                    '<div class="block_reference_container">'+
                        '<div class="block_reference"></div>'+
                    '</div>'+
                '</td>'+
                '<td>'+
                    '<div class="block_template_container">'+
                        '<div class="block_template"></div>'+
                    '</div>'+
                '</td>'+
                '<td>&nbsp;</td>'+
            '</tr>'+
        '</tbody>'+
    '</table>'+
'</div>'+
'</div>'+
'</div>';

window.pageGroupTemplate = pageGroupTemplate;

var WidgetInstance = {
    pageGroupTemplate    : pageGroupTemplate,
    pageGroupContainerId : 'page_group_container',
    count : 0,
    activePageGroups : \$H({}),
    selectedItems : {},

addPageGroup : function(data) {
        if (this.pageGroupTemplate && (pageGroupContainer = $(this.pageGroupContainerId))) {
            if (!data.page_id) {
                data = {};
                data.page_id = 0;
                data.entities = '';
            }
            data.id = this.count++;
            if (data[data.group + '_entities']) {
                var selected_entities = data[data.group + '_entities'].split(',');
                if (selected_entities.length > 0) {
                    for (var i = 0; i < selected_entities.length; i++) {
                        this.addProductItemToSelection(data.group + '_ids_' + data.id, selected_entities[i]);
                    }
                }
            }
            pageGroupTemplateObj = mageTemplate(this.pageGroupTemplate);
                Element.insert(pageGroupContainer, {
                    'bottom': pageGroupTemplateObj({
                        data: data
                    })
                });
                if (data.group) {
                pageGroup = $(data.group+'_'+data.id);
                additional = {};
                additional.selectedLayoutHandle = data.layout_handle;
                additional.selectedBlock = data.block;
                additional.selectedTemplate = data.template;
                additional.position = data.position;
                additional.for_value = data.for_value;
                additional.template = '';
                if (data.group == 'pages' || data.group == 'page_layouts') {
                    layoutSelect = pageGroup.down('select#layout_handle');
                    if (layoutSelect) {
                        for (var i = 0; i < layoutSelect.options.length; i++) {
                            if (layoutSelect.options[i].value == data.layout_handle) {
                                layoutSelect.options[i].selected = true;
                                break;
                            }
                        }
                    }
                }
                if ($(this.pageGroupContainerId+'_'+data.id)) {
                    selectGroupElm = $(this.pageGroupContainerId+'_'+data.id).down('select.page_group_select');
                    for (var i = 0; i < selectGroupElm.options.length; i++) {
                        if (selectGroupElm.options[i].value == data.group) {
                            selectGroupElm.options[i].selected = true;
                            break;
                        }
                    }
                }
                forElm = pageGroup.down('input.for_'+data.for_value);
                if (forElm) {
                    /**
                     * IE browsers fix: remove default checked attribute in radio form element
                     * to check others radio form elements in future
                     */
                    pageGroup.down('input.for_all').defaultChecked = false;
                    forElm.defaultChecked = true;
                    forElm.checked = true;
                    this.togglePageGroupChooser(forElm);
                }
                this.displayPageGroup(pageGroup, additional);
            }
        }
    },
    removePageGroup : function(element) {
        container = element.up('div.page_group_container');
        if (container) {
            container.remove();
        }
    },
    addProductItemToSelection: function(groupId, item) {
        if (undefined == this.selectedItems[groupId]) {
            this.selectedItems[groupId] = \$H({});
        }
        if (!isNaN(parseInt(item))) {
            this.selectedItems[groupId].set(item, 1);
        }
    },
    removeProductItemFromSelection: function(groupId, item) {
        if (undefined !== this.selectedItems[groupId]) {
            this.selectedItems[groupId].unset(item);
        }
    },
    showBlockContainer : function(container) {
        container = $(container);
        if (container) {
            container.removeClassName('no-display');
            container.removeClassName('ignore-validate');
            container.up('.fieldset-wrapper').addClassName('opened');
            container.select('input', 'select').each(function(element) {
                $(element).removeAttribute('disabled');
            });
            container.show();
        }
    },
    hideBlockContainer : function(container) {
        container = $(container);
        if (container) {
            container.addClassName('no-display');
            container.addClassName('ignore-validate');
            container.select('input', 'select').each(function(element) {
                $(element).writeAttribute('disabled', 'disabled');
            });
            container.hide();
        }
    },
    displayPageGroup : function(container, additional) {
        container = $(container);
        if (!additional) {
            additional = {};
        }
        if (activePageGroupId = this.activePageGroups.get(container.up('div.page_group_container').id)) {
            this.hideBlockContainer(activePageGroupId);
        }
        this.activePageGroups.set(container.up('div.page_group_container').id, container.id);
        this.showBlockContainer(container);
        blockContainer = container.down('div.block_reference');
        if (blockContainer && blockContainer.innerHTML == '') {
            layoutHandle = '';
            if (layoutHandleField = container.down('input.layout_handle_pattern')) {
                layoutHandle = layoutHandleField.value;
            } else if (additional.selectedLayoutHandle) {
                layoutHandle = additional.selectedLayoutHandle;
            }
            this.loadSelectBoxByType('block_reference', container, layoutHandle, additional);
        }
        this.loadSelectBoxByType('block_template', container, additional.selectedBlock, additional);
    },
    displayEntityChooser : function(type, chooser, additional) {
        if (!additional) {
            additional = {};
        }
        if (type == 'categories') {
            additional.url = '{$escaper->escapeJs($escaper->escapeUrl($block->getCategoriesChooserUrl()))}';
            additional.post_parameters = \$H({'is_anchor_only':$(chooser).down('input.is_anchor_only').value});
        } else if (type == 'products') {
            additional.url = '{$escaper->escapeJs($escaper->escapeUrl($block->getProductsChooserUrl()))}';
            additional.post_parameters = \$H({'product_type_id':$(chooser).down('input.product_type_id').value});
        }
        if (chooser && additional) {
            this.displayChooser(chooser, additional);
        }
    },
    hideEntityChooser : function(chooser) {
        chooser = $(chooser).down('div.chooser');
        if (chooser) {
            chooser.addClassName('no-display');
            chooser.hide();
        }
    },
    displayChooser : function(chooser, additional) {
        chooser = $(chooser).down('div.chooser');
        entities = chooser.up('div.chooser_container').down('input[type="text"].entities').value;
        postParameters = \$H({selected:entities});
        url = '';
        if (additional) {
            if (additional.url) url = additional.url;
            if (additional.post_parameters) {
                additional.post_parameters.each(function(pair){
                    postParameters.set(pair.key,pair.value);
                });
            }
        }
        if (chooser && url) {
            if (chooser.innerHTML == '') {
                new Ajax.Request(url, {
                    method: 'post',
                    parameters: postParameters,
                    onSuccess: function(transport) {
                        try {
                            if (transport.responseText) {
                                Element.insert(chooser, transport.responseText);
                                chooser.removeClassName('no-display');
                                chooser.show();
                            }
                        } catch (e) {
                            alert({
                                content: 'Error occurs during loading chooser.'
                            });
                        }
                    }
                });
            } else {
                chooser.removeClassName('no-display');
                chooser.show();
            }
        }
    },
    checkProduct : function(event) {
        var elm = event.memo.element,
            container = event.target.up('div.chooser').up('div.chooser_container'),
            selectionId = container.id,
            entitiesElm = container.down('input[type="text"].entities');
        if (elm.checked) {
            this.addProductItemToSelection(selectionId, elm.value);
        } else {
            this.removeProductItemFromSelection(selectionId, elm.value);
        }
        if (entitiesElm) {
            entitiesElm.value = this.selectedItems[selectionId].keys().join(',');
        }
    },
    togglePageGroupChooser : function(element) {
        element = $(element);
        if (element && (chooser = element.up('div.group_container').down('div.chooser_container'))) {
            if (element.value == 'all') {
                chooser.addClassName('no-display');
                chooser.hide();
            } else {
                chooser.removeClassName('no-display');
                chooser.show();
            }
        }
    },
    loadSelectBoxByType : function (type, element, value, additional) {
        if (!additional) {
            additional = {};
        }
        if (element && (containerElm = element.down('div.'+type))) {
            url = '';
            selected = '';
            parameters = {};
            if (type == 'block_reference') {
                url = '{$escaper->escapeJs($escaper->escapeUrl($block->getBlockChooserUrl()))}';
                if (additional.selectedBlock) {
                    selected = additional.selectedBlock;
                }
                parameters.layout = value;
            } else if (type == 'block_template') {
                url = '{$escaper->escapeJs($escaper->escapeUrl($block->getTemplateChooserUrl()))}';
                if (additional.selectedTemplate) {
                    selected = additional.selectedTemplate;
                }
                parameters.block = value;
            }
            parameters.selected = selected;
            if (url) {
                new Ajax.Request(url, {
                    method: 'post',
                    parameters: parameters,
                    containerElm: containerElm,
                    onSuccess: function(transport) {
                        containerElm = transport.request.options.containerElm;
                        try {
                            if (transport.responseText) {
                                containerElm.update(transport.responseText);
                                formElm = containerElm.down('select, input[type="hidden"]');
                                if (formElm) {
                                    formElm.name = element.down('input.container_name').value+'['+formElm.name+']';
                                }
                            }
                        } catch (e) {
                            alert({
                                content: 'Error occurs during loading chooser.'
                            });
                        }
                    }
                });
            }
        }
    }
};

window.WidgetInstance = WidgetInstance;

jQuery(function(){

script;
foreach ($block->getPageGroups() as $pageGroup):
    $scriptString .= <<<script

WidgetInstance.addPageGroup({$pageGroup});

script;
endforeach;

$scriptString .= <<<script

Event.observe(document, 'product:changed', function(event){
        WidgetInstance.checkProduct(event);
    });
    Event.observe(document, 'category:beforeLoad', function(event) {
        container = event.target.up('div.chooser_container');
        value = container.down('input[type="text"].entities').value.strip();
        event.memo.treeLoader.baseParams.selected = value;
    });
});
//]]>

});

script;
?>
<?= /* @noEscape */ $secureRenderer->renderTag('script', [], $scriptString, false) ?>

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