diff core/includes/tablesort.inc @ 0:c75dbcec494b

Initial commit from drush-created site

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/includes/tablesort.inc	Thu Jul 05 14:24:15 2018 +0000
@@ -0,0 +1,149 @@
+<?php
+
+/**
+ * @file
+ * Functions to aid in the creation of sortable tables.
+ *
+ * All tables created when rendering a '#type' => 'table' have the option of
+ * having column headers that the user can click on to sort the table by that
+ * column.
+ */
+
+use Drupal\Component\Utility\SafeMarkup;
+use Drupal\Core\Url;
+use Drupal\Component\Utility\UrlHelper;
+
+/**
+ * Initializes the table sort context.
+ */
+function tablesort_init($header) {
+  $ts = tablesort_get_order($header);
+  $ts['sort'] = tablesort_get_sort($header);
+  $ts['query'] = tablesort_get_query_parameters();
+  return $ts;
+}
+
+/**
+ * Formats a column header.
+ *
+ * If the cell in question is the column header for the current sort criterion,
+ * it gets special formatting. All possible sort criteria become links.
+ *
+ * @param string $cell_content
+ *   The cell content to format. Passed by reference.
+ * @param array $cell_attributes
+ *   The cell attributes. Passed by reference.
+ * @param array $header
+ *   An array of column headers in the format described in '#type' => 'table'.
+ * @param array $ts
+ *   The current table sort context as returned from tablesort_init().
+ */
+function tablesort_header(&$cell_content, array &$cell_attributes, array $header, array $ts) {
+  // Special formatting for the currently sorted column header.
+  if (isset($cell_attributes['field'])) {
+    $title = t('sort by @s', ['@s' => $cell_content]);
+    if ($cell_content == $ts['name']) {
+      // aria-sort is a WAI-ARIA property that indicates if items in a table
+      // or grid are sorted in ascending or descending order. See
+      // http://www.w3.org/TR/wai-aria/states_and_properties#aria-sort
+      $cell_attributes['aria-sort'] = ($ts['sort'] == 'asc') ? 'ascending' : 'descending';
+      $ts['sort'] = (($ts['sort'] == 'asc') ? 'desc' : 'asc');
+      $cell_attributes['class'][] = 'is-active';
+      $tablesort_indicator = [
+        '#theme' => 'tablesort_indicator',
+        '#style' => $ts['sort'],
+      ];
+      $image = \Drupal::service('renderer')->render($tablesort_indicator);
+    }
+    else {
+      // If the user clicks a different header, we want to sort ascending initially.
+      $ts['sort'] = 'asc';
+      $image = '';
+    }
+    $cell_content = \Drupal::l(SafeMarkup::format('@cell_content@image', ['@cell_content' => $cell_content, '@image' => $image]), new Url('<current>', [], [
+      'attributes' => ['title' => $title],
+      'query' => array_merge($ts['query'], [
+        'sort' => $ts['sort'],
+        'order' => $cell_content,
+      ]),
+    ]));
+
+    unset($cell_attributes['field'], $cell_attributes['sort']);
+  }
+}
+
+/**
+ * Composes a URL query parameter array for table sorting links.
+ *
+ * @return
+ *   A URL query parameter array that consists of all components of the current
+ *   page request except for those pertaining to table sorting.
+ */
+function tablesort_get_query_parameters() {
+  return UrlHelper::filterQueryParameters(\Drupal::request()->query->all(), ['sort', 'order']);
+}
+
+/**
+ * Determines the current sort criterion.
+ *
+ * @param $headers
+ *   An array of column headers in the format described in '#type' => 'table'.
+ *
+ * @return
+ *   An associative array describing the criterion, containing the keys:
+ *   - "name": The localized title of the table column.
+ *   - "sql": The name of the database field to sort on.
+ */
+function tablesort_get_order($headers) {
+  $order = \Drupal::request()->query->get('order', '');
+  foreach ($headers as $header) {
+    if (is_array($header)) {
+      if (isset($header['data']) && $order == $header['data']) {
+        $default = $header;
+        break;
+      }
+
+      if (empty($default) && isset($header['sort']) && ($header['sort'] == 'asc' || $header['sort'] == 'desc')) {
+        $default = $header;
+      }
+    }
+  }
+
+  if (!isset($default)) {
+    $default = reset($headers);
+    if (!is_array($default)) {
+      $default = ['data' => $default];
+    }
+  }
+
+  $default += ['data' => NULL, 'field' => NULL];
+  return ['name' => $default['data'], 'sql' => $default['field']];
+}
+
+/**
+ * Determines the current sort direction.
+ *
+ * @param $headers
+ *   An array of column headers in the format described in '#type' => 'table'.
+ *
+ * @return
+ *   The current sort direction ("asc" or "desc").
+ */
+function tablesort_get_sort($headers) {
+  $query = \Drupal::request()->query;
+  if ($query->has('sort')) {
+    return (strtolower($query->get('sort')) == 'desc') ? 'desc' : 'asc';
+  }
+  // The user has not specified a sort. Use the default for the currently sorted
+  // header if specified; otherwise use "asc".
+  else {
+    // Find out which header is currently being sorted.
+    $ts = tablesort_get_order($headers);
+    foreach ($headers as $header) {
+      if (is_array($header) && isset($header['data']) && $header['data'] == $ts['name'] && isset($header['sort'])) {
+        return $header['sort'];
+      }
+    }
+  }
+  return 'asc';
+}