ISTWCMS-4084: adding inverted L left layout

src/Plugin/Layout/UwInvertedLLeftLayout.php

+<?php
+
+namespace Drupal\uw_cfg_common\Plugin\Layout;
+
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * A UW Inverted L Left layout.
+ */
+class UwInvertedLLeftLayout extends UwColumnLayoutBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+
+    // Get the config for this layout.
+    $configuration = $this->getConfiguration();
+
+    // The options for the column widths.
+    $options = [
+      'even-split' => $this->t('Even split (50%, 50%)'),
+      'larger-left' => $this->t('Larger left (33%, 67%)'),
+      'larger-right' => $this->t('Larger right (67%, 33%)'),
+    ];
+
+    // The form element for the column widths.
+    $form['layout_settings']['column_class'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Column widths for top row'),
+      '#default_value' => !empty($configuration['column_class']) ? $configuration['column_class'] : 'even-split',
+      '#options' => $options,
+    ];
+
+    return $form;
+  }
+
+}

uw_cfg_common.layouts.yml

@@ -89,4 +89,22 @@ uw_inverted_l_right:
       label: Fourth
   icon_map:
     - [first, second, fourth]
-    - [third, third, fourth]
+    - [third, third, fourth]
\ No newline at end of file
+uw_inverted_l_left:
+  label: 'Inverted "L" - left'
+  category: 'UW layouts'
+  class: '\Drupal\uw_cfg_common\Plugin\Layout\UwInvertedLLeftLayout'
+  template: uw_fdsu_theme_resp/templates/layout/layout--invertedlleft
+  default_region: first
+  regions:
+    first:
+      label: First
+    second:
+      label: Second
+    third:
+      label: Third
+    fourth:
+      label: Fourth
+  icon_map:
+    - [first, second, third]
+    - [first, fourth, fourth]
\ No newline at end of file