diff -r 07239de796bb -r e756a8c72c3d cms/drupal/includes/tablesort.inc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/includes/tablesort.inc	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,255 @@
+<?php
+
+/**
+ * @file
+ * Functions to aid in the creation of sortable tables.
+ *
+ * All tables created with a call to theme('table') have the option of having
+ * column headers that the user can click on to sort the table by that column.
+ */
+
+
+/**
+ * Query extender class for tablesort queries.
+ */
+class TableSort extends SelectQueryExtender {
+
+  /**
+   * The array of fields that can be sorted by.
+   *
+   * @var array
+   */
+  protected $header = array();
+
+  public function __construct(SelectQueryInterface $query, DatabaseConnection $connection) {
+    parent::__construct($query, $connection);
+
+    // Add convenience tag to mark that this is an extended query. We have to
+    // do this in the constructor to ensure that it is set before preExecute()
+    // gets called.
+    $this->addTag('tablesort');
+  }
+
+  /**
+   * Order the query based on a header array.
+   *
+   * @see theme_table()
+   * @param $header
+   *   Table header array.
+   * @return SelectQueryInterface
+   *   The called object.
+   */
+  public function orderByHeader(Array $header) {
+    $this->header = $header;
+    $ts = $this->init();
+    if (!empty($ts['sql'])) {
+      // Based on code from db_escape_table(), but this can also contain a dot.
+      $field = preg_replace('/[^A-Za-z0-9_.]+/', '', $ts['sql']);
+
+      // orderBy() will ensure that only ASC/DESC values are accepted, so we
+      // don't need to sanitize that here.
+      $this->orderBy($field, $ts['sort']);
+    }
+    return $this;
+  }
+
+  /**
+   * Initializes the table sort context.
+   */
+  protected function init() {
+    $ts = $this->order();
+    $ts['sort'] = $this->getSort();
+    $ts['query'] = $this->getQueryParameters();
+    return $ts;
+  }
+
+  /**
+   * Determine the current sort direction.
+   *
+   * @param $headers
+   *   An array of column headers in the format described in theme_table().
+   * @return
+   *   The current sort direction ("asc" or "desc").
+   */
+  protected function getSort() {
+    return tablesort_get_sort($this->header);
+  }
+
+  /**
+   * Compose a URL query parameter array to append to table sorting requests.
+   *
+   * @return
+   *   A URL query parameter array that consists of all components of the current
+   *   page request except for those pertaining to table sorting.
+   *
+   * @see tablesort_get_query_parameters()
+   */
+  protected function getQueryParameters() {
+    return tablesort_get_query_parameters();
+  }
+
+  /**
+   * Determine the current sort criterion.
+   *
+   * @param $headers
+   *   An array of column headers in the format described in theme_table().
+   * @return
+   *   An associative array describing the criterion, containing the keys:
+   *   - "name": The localized title of the table column.
+   *   - "sql": The name of the database field to sort on.
+   */
+  protected function order() {
+    return tablesort_get_order($this->header);
+  }
+}
+
+/**
+ * Initialize 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 $cell
+ *   The cell to format.
+ * @param $header
+ *   An array of column headers in the format described in theme_table().
+ * @param $ts
+ *   The current table sort context as returned from tablesort_init().
+ *
+ * @return
+ *   A properly formatted cell, ready for _theme_table_cell().
+ */
+function tablesort_header($cell, $header, $ts) {
+  // Special formatting for the currently sorted column header.
+  if (is_array($cell) && isset($cell['field'])) {
+    $title = t('sort by @s', array('@s' => $cell['data']));
+    if ($cell['data'] == $ts['name']) {
+      $ts['sort'] = (($ts['sort'] == 'asc') ? 'desc' : 'asc');
+      $cell['class'][] = 'active';
+      $image = theme('tablesort_indicator', array('style' => $ts['sort']));
+    }
+    else {
+      // If the user clicks a different header, we want to sort ascending initially.
+      $ts['sort'] = 'asc';
+      $image = '';
+    }
+    $cell['data'] = l($cell['data'] . $image, $_GET['q'], array('attributes' => array('title' => $title), 'query' => array_merge($ts['query'], array('sort' => $ts['sort'], 'order' => $cell['data'])), 'html' => TRUE));
+
+    unset($cell['field'], $cell['sort']);
+  }
+  return $cell;
+}
+
+/**
+ * Formats a table cell.
+ *
+ * Adds a class attribute to all cells in the currently active column.
+ *
+ * @param $cell
+ *   The cell to format.
+ * @param $header
+ *   An array of column headers in the format described in theme_table().
+ * @param $ts
+ *   The current table sort context as returned from tablesort_init().
+ * @param $i
+ *   The index of the cell's table column.
+ *
+ * @return
+ *   A properly formatted cell, ready for _theme_table_cell().
+ */
+function tablesort_cell($cell, $header, $ts, $i) {
+  if (isset($header[$i]['data']) && $header[$i]['data'] == $ts['name'] && !empty($header[$i]['field'])) {
+    if (is_array($cell)) {
+      $cell['class'][] = 'active';
+    }
+    else {
+      $cell = array('data' => $cell, 'class' => array('active'));
+    }
+  }
+  return $cell;
+}
+
+/**
+ * Composes a URL query parameter array for table sorting links.
+ *
+ * @return
+ *   A URL query parameter array that consists of all components of the current
+ *   page request except for those pertaining to table sorting.
+ */
+function tablesort_get_query_parameters() {
+  return drupal_get_query_parameters($_GET, array('q', 'sort', 'order'));
+}
+
+/**
+ * Determines the current sort criterion.
+ *
+ * @param $headers
+ *   An array of column headers in the format described in theme_table().
+ *
+ * @return
+ *   An associative array describing the criterion, containing the keys:
+ *   - "name": The localized title of the table column.
+ *   - "sql": The name of the database field to sort on.
+ */
+function tablesort_get_order($headers) {
+  $order = isset($_GET['order']) ? $_GET['order'] : '';
+  foreach ($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 = array('data' => $default);
+    }
+  }
+
+  $default += array('data' => NULL, 'field' => NULL);
+  return array('name' => $default['data'], 'sql' => $default['field']);
+}
+
+/**
+ * Determines the current sort direction.
+ *
+ * @param $headers
+ *   An array of column headers in the format described in theme_table().
+ *
+ * @return
+ *   The current sort direction ("asc" or "desc").
+ */
+function tablesort_get_sort($headers) {
+  if (isset($_GET['sort'])) {
+    return (strtolower($_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';
+}