newsupernova/vendor/magento/module-email/view/adminhtml/templates/template/edit.phtml

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

use Magento\Framework\App\TemplateTypesInterface;

// @codingStandardsIgnoreFile

/** @var $block \Magento\Email\Block\Adminhtml\Template\Edit */
?>
<?php if (!$block->getEditMode()): ?>
<form action="<?= $block->escapeUrl($block->getLoadUrl()) ?>" method="post" id="email_template_load_form">
    <?= $block->getBlockHtml('formkey') ?>
    <fieldset class="admin__fieldset form-inline">
        <legend class="admin__legend"><span><?= $block->escapeHtml(__('Load default template')) ?></span></legend><br>
        <div class="admin__field">
            <label class="admin__field-label" for="template_select"><?= $block->escapeHtml(__('Template')) ?></label>
            <div class="admin__field-control">
                <select id="template_select" name="code" class="admin__control-select required-entry">
                    <?php foreach ($block->getTemplateOptions() as $group => $options): ?>
                        <?php if ($group): ?>
                            <optgroup label="<?= $block->escapeHtmlAttr($group) ?>">
                        <?php endif; ?>
                        <?php foreach ($options as $option): ?>
                            <option value="<?= $block->escapeHtmlAttr($option['value']) ?>"<?= /* @noEscape */ $block->getOrigTemplateCode() == $option['value'] ? ' selected="selected"' : '' ?>><?= $block->escapeHtml($option['label']) ?></option>
                        <?php endforeach; ?>
                        <?php if ($group): ?>
                            </optgroup>
                        <?php endif; ?>
                    <?php endforeach; ?>
                </select>
            </div>
        </div>
        <div class="admin__field required">
            <span class="admin__field-label"></span>
            <div class="admin__field-control">
                <?= /* @noEscape */ $block->getLoadButtonHtml() ?>
            </div>
        </div>
    </fieldset>
</form>
<?php endif ?>

<form action="<?= $block->escapeUrl($block->getSaveUrl()) ?>" method="post" id="email_template_edit_form">
    <?= /* @noEscape */ $block->getBlockHtml('formkey') ?>
    <input type="hidden" id="change_flag_element" name="_change_type_flag" value="" />
    <input type="hidden" id="orig_template_code" name="orig_template_code" value="<?= $block->escapeHtmlAttr($block->getOrigTemplateCode()) ?>" />
    <?= /* @noEscape */ $block->getFormHtml() ?>
</form>

<form action="<?= $block->escapeUrl($block->getPreviewUrl()) ?>" method="post" id="email_template_preview_form" target="_blank">
    <?= /* @noEscape */ $block->getBlockHtml('formkey') ?>
    <div class="no-display">
        <input type="hidden" id="preview_type" name="type" value="<?= /* @noEscape */ $block->isTextType() ? 1 : 2 ?>" />
        <input type="hidden" id="preview_text" name="text" value="" />
        <input type="hidden" id="preview_styles" name="styles" value="" />
    </div>
</form>
<script>
require([
    "jquery",
    "wysiwygAdapter",
    "Magento_Ui/js/modal/alert",
    "mage/mage",
    "Magento_Email/js/variables",
    "prototype"
], function(jQuery, tinyMCE, alert){

//<![CDATA[
    jQuery('#email_template_edit_form').mage('form').mage('validation');
    jQuery('#email_template_preview_form').mage('form').mage('validation');
    jQuery('#email_template_load_form').mage('validation');
    templateControl = {
        unconvertedText: '',
        typeChange: false,
        variables: null,

        events: {
            'click [data-role=template-save]' : 'save',
            'click [data-role=template-preview]' : 'preview',
            'click [data-role=template-unstrip]' : 'unStripTags',
            'click [data-role=template-strip]' : 'stripTags',
            'click [data-role=template-delete]': 'deleteTemplate',
            'click [data-role=template-load]': 'load'
        },

        init: function () {
            if ($('convert_button_back')) {
                $('convert_button_back').hide();
            }

            this.bindEvents();

            this.renderPaths(<?= /* @noEscape */ $block->getCurrentlyUsedForPaths() ?>, 'currently_used_for');
        },

        bindEvents: function(){
            var events = this.events,
                eventName,
                selector,
                callback,
                key;

            for( key in events ){
                callback    = this[events[key]];
                key         = key.split(' ');

                eventName   = key[0];
                selector    = key.slice(1).join(' ');

                jQuery(selector).on(eventName, jQuery.proxy(callback, this) );
            }
        },

        stripTags: function () {
            if(!window.confirm("<?= $block->escapeJs($block->escapeHtml(__('Are you sure you want to strip tags?'))) ?>")) {
                return false;
            }
            this.unconvertedText = $('template_text').value;
            $('convert_button').hide();
            $('template_text').value =  $('template_text').value.stripScripts().replace(
                new RegExp('<style[^>]*>[\\S\\s]*?</style>', 'img'), ''
            ).stripTags().strip();
            $('convert_button_back').show();
            $('field_template_styles').hide();
            this.typeChange = true;
            return false;
        },
        unStripTags: function () {
            $('convert_button').show();
            $('convert_button_back').hide();
            $('template_text').value =  this.unconvertedText;
            $('field_template_styles').show();
            this.typeChange = false;
            return false;
        },
        save: function() {
            if (this.typeChange) {
                $('change_flag_element').value = '1';
            }
            // Temporary solution will be replaced after refactoring of email templates functionality
            jQuery('#email_template_edit_form').triggerHandler('save');
            return false;
        },
        preview: function() {
            if (this.typeChange) {
                $('preview_type').value = <?= /* @noEscape */ TemplateTypesInterface::TYPE_TEXT ?>;
            } else {
                $('preview_type').value = <?= (int) $block->getTemplateType() ?>;
            }
            if (typeof tinyMCE == 'undefined' || !tinyMCE.get('template_text')) {
                $('preview_text').value = $('template_text').value;
            } else {
                $('preview_text').value = tinyMCE.get('template_text').getHTML();
            }

            if ($('template_styles') != undefined) {
                $('preview_styles').value = $('template_styles').value;
            }

            // Temporary solution will be replaced after refactoring of email templates functionality
            jQuery('#email_template_preview_form').triggerHandler('save');
            return false;
        },

        deleteTemplate: function() {
            if(window.confirm("<?= $block->escapeJs($block->escapeHtml(__('Are you sure you want to delete this template?'))) ?>")) {
                   window.location.href = '<?= $block->escapeJs($block->escapeUrl($block->getDeleteUrl())) ?>';
            }
        },

        load: function() {
            // Temporary solution will be replaced after refactoring of email templates functionality
            if (!jQuery('#email_template_load_form').valid()) {
                return;
            }

            this.variables = null;

            new Ajax.Request($('email_template_load_form').action, {
               parameters: Form.serialize($('email_template_load_form'), true),
               area: $('email_template_load_form'),
               onComplete: function (transport) {
                   if (transport.responseText.isJSON()) {
                       var fields = $H(transport.responseText.evalJSON());
                       fields.each(function(pair) {
                          if ($(pair.key)) {
                              $(pair.key).value = pair.value.strip();
                          }
                          if (pair.key == 'template_type') {
                              if (pair.value == 1) {
                                  this.typeChange = true;
                                  $('convert_button').hide();
                                  $('convert_button_back').hide();
                              } else {
                                  this.typeChange = false;
                                  $('convert_button_back').hide();
                                  $('convert_button').show();
                              }
                          }
                          if (pair.key == 'orig_template_currently_used_for') {
                               if(pair.value.length){
                                   $('currently_used_for').show();
                                   this.renderPaths(pair.value, 'currently_used_for');
                               }
                               else{
                                   $('currently_used_for').hide();
                               }
                          }
                       }.bind(this));
                   } else {
                       alert({
                           content: '<?= $block->escapeJs($block->escapeHtml(__('The template did not load. Please review the log for details.'))) ?>'
                       });
                   }
               }.bind(this)
            });

        },

        renderPaths: function(paths, fieldId) {
            var field = $(fieldId);
            if (field) {
                field.down('div').down('div').update(this.parsePath(paths, '<span class="path-delimiter">&nbsp;-&gt;&nbsp;</span>', '<br />'));
            }
        },

        parsePath: function (value, pathDelimiter, lineDelimiter) {
            if (Object.isArray(value)) {
                var result = [];
                for (var i = 0, len = value.length; i < len; i++) {
                    result.push(this.parsePath(value[i], pathDelimiter, pathDelimiter));
                }
                return result.join(lineDelimiter);
            }

            if(!Object.isString(value) && value.title) {
                value = (value.url ? '<a href="' + value.url + '">' + value.title + '</a>' : value.title) + (value.scope ? '&nbsp;&nbsp;<span class="path-scope-label">(' + value.scope + ')</span>' : '');
            }

            return value;
        },

        openVariableChooser: function() {
            Variables.init('template_text');
            if (this.variables == null) {
                Variables.resetData();
                this.variables = $('variables').value.evalJSON();
                var templateVariablesValue = $('template_variables').value;
                if (this.variables && templateVariablesValue) {
                    if (templateVariables = templateVariablesValue.evalJSON()) {
                        this.variables.push(templateVariables);
                    }
                }
            }
            if (this.variables) {
                Variables.openVariableChooser(this.variables);
            }
        }
    };

    templateControl.init();
//]]>

});
</script>