3 namespace Drupal\views\Plugin\views\pager;
5 use Drupal\Core\Cache\Cache;
6 use Drupal\Core\Cache\CacheableDependencyInterface;
7 use Drupal\Core\Form\FormStateInterface;
10 * A common base class for sql based pager.
12 abstract class SqlBase extends PagerPluginBase implements CacheableDependencyInterface {
14 protected function defineOptions() {
15 $options = parent::defineOptions();
16 $options['items_per_page'] = ['default' => 10];
17 $options['offset'] = ['default' => 0];
18 $options['id'] = ['default' => 0];
19 $options['total_pages'] = ['default' => ''];
20 $options['expose'] = [
22 'items_per_page' => ['default' => FALSE],
23 'items_per_page_label' => ['default' => $this->t('Items per page')],
24 'items_per_page_options' => ['default' => '5, 10, 25, 50'],
25 'items_per_page_options_all' => ['default' => FALSE],
26 'items_per_page_options_all_label' => ['default' => $this->t('- All -')],
28 'offset' => ['default' => FALSE],
29 'offset_label' => ['default' => $this->t('Offset')],
34 'previous' => ['default' => $this->t('‹ Previous')],
35 'next' => ['default' => $this->t('Next ›')],
42 * Provide the default form for setting options.
44 public function buildOptionsForm(&$form, FormStateInterface $form_state) {
45 parent::buildOptionsForm($form, $form_state);
46 $pager_text = $this->displayHandler->getPagerText();
47 $form['items_per_page'] = [
48 '#title' => $pager_text['items per page title'],
50 '#description' => $pager_text['items per page description'],
51 '#default_value' => $this->options['items_per_page'],
56 '#title' => $this->t('Offset (number of items to skip)'),
57 '#description' => $this->t('For example, set this to 3 and the first 3 items will not be displayed.'),
58 '#default_value' => $this->options['offset'],
63 '#title' => $this->t('Pager ID'),
64 '#description' => $this->t("Unless you're experiencing problems with pagers related to this view, you should leave this at 0. If using multiple pagers on one page you may need to set this number to a higher value so as not to conflict within the ?page= array. Large values will add a lot of commas to your URLs, so avoid if possible."),
65 '#default_value' => $this->options['id'],
68 $form['total_pages'] = [
70 '#title' => $this->t('Number of pages'),
71 '#description' => $this->t('Leave empty to show all pages.'),
72 '#default_value' => $this->options['total_pages'],
79 '#title' => $this->t('Pager link labels'),
83 $form['tags']['previous'] = [
84 '#type' => 'textfield',
85 '#title' => $this->t('Previous page link text'),
86 '#default_value' => $this->options['tags']['previous'],
89 $form['tags']['next'] = [
90 '#type' => 'textfield',
91 '#title' => $this->t('Next page link text'),
92 '#default_value' => $this->options['tags']['next'],
99 '#title' => $this->t('Exposed options'),
101 '#description' => $this->t('Allow user to control selected display options for this view.'),
104 $form['expose']['items_per_page'] = [
105 '#type' => 'checkbox',
106 '#title' => $this->t('Allow user to control the number of items displayed in this view'),
107 '#default_value' => $this->options['expose']['items_per_page'],
110 $form['expose']['items_per_page_label'] = [
111 '#type' => 'textfield',
112 '#title' => $this->t('Items per page label'),
114 '#default_value' => $this->options['expose']['items_per_page_label'],
117 'input[name="pager_options[expose][items_per_page]"]' => ['checked' => FALSE],
122 $form['expose']['items_per_page_options'] = [
123 '#type' => 'textfield',
124 '#title' => $this->t('Exposed items per page options'),
126 '#description' => $this->t('Set between which values the user can choose when determining the items per page. Separated by comma.'),
127 '#default_value' => $this->options['expose']['items_per_page_options'],
130 'input[name="pager_options[expose][items_per_page]"]' => ['checked' => FALSE],
136 $form['expose']['items_per_page_options_all'] = [
137 '#type' => 'checkbox',
138 '#title' => $this->t('Allow user to display all items'),
139 '#default_value' => $this->options['expose']['items_per_page_options_all'],
142 $form['expose']['items_per_page_options_all_label'] = [
143 '#type' => 'textfield',
144 '#title' => $this->t('All items label'),
145 '#default_value' => $this->options['expose']['items_per_page_options_all_label'],
148 'input[name="pager_options[expose][items_per_page_options_all]"]' => ['checked' => FALSE],
153 $form['expose']['offset'] = [
154 '#type' => 'checkbox',
155 '#title' => $this->t('Allow user to specify number of items skipped from beginning of this view.'),
156 '#default_value' => $this->options['expose']['offset'],
159 $form['expose']['offset_label'] = [
160 '#type' => 'textfield',
161 '#title' => $this->t('Offset label'),
163 '#default_value' => $this->options['expose']['offset_label'],
166 'input[name="pager_options[expose][offset]"]' => ['checked' => FALSE],
172 public function validateOptionsForm(&$form, FormStateInterface $form_state) {
173 // Only accept integer values.
175 $exposed_options = $form_state->getValue(['pager_options', 'expose', 'items_per_page_options']);
176 if (strpos($exposed_options, '.') !== FALSE) {
179 $options = explode(',', $exposed_options);
180 if (!$error && is_array($options)) {
181 foreach ($options as $option) {
182 if (!is_numeric($option) || intval($option) == 0) {
191 $form_state->setErrorByName('pager_options][expose][items_per_page_options', $this->t('Insert a list of integer numeric values separated by commas: e.g: 10, 20, 50, 100'));
194 // Make sure that the items_per_page is part of the expose settings.
195 if (!$form_state->isValueEmpty(['pager_options', 'expose', 'items_per_page']) && !$form_state->isValueEmpty(['pager_options', 'items_per_page'])) {
196 $items_per_page = $form_state->getValue(['pager_options', 'items_per_page']);
197 if (array_search($items_per_page, $options) === FALSE) {
198 $form_state->setErrorByName('pager_options][expose][items_per_page_options', $this->t("The <em>Exposed items per page</em> field's options must include the value from the <em>Items per page</em> field (@items_per_page).",
199 ['@items_per_page' => $items_per_page])
205 public function query() {
206 if ($this->itemsPerPageExposed()) {
207 $query = $this->view->getRequest()->query;
208 $items_per_page = $query->get('items_per_page');
209 if ($items_per_page > 0) {
210 $this->options['items_per_page'] = $items_per_page;
212 elseif ($items_per_page == 'All' && $this->options['expose']['items_per_page_options_all']) {
213 $this->options['items_per_page'] = 0;
216 if ($this->isOffsetExposed()) {
217 $query = $this->view->getRequest()->query;
218 $offset = $query->get('offset');
219 if (isset($offset) && $offset >= 0) {
220 $this->options['offset'] = $offset;
224 $limit = $this->options['items_per_page'];
225 $offset = $this->current_page * $this->options['items_per_page'] + $this->options['offset'];
226 if (!empty($this->options['total_pages'])) {
227 if ($this->current_page >= $this->options['total_pages']) {
228 $limit = $this->options['items_per_page'];
229 $offset = $this->options['total_pages'] * $this->options['items_per_page'];
233 $this->view->query->setLimit($limit);
234 $this->view->query->setOffset($offset);
239 * Set the current page.
242 * If provided, the page number will be set to this. If NOT provided,
243 * the page number will be set from the global page array.
245 public function setCurrentPage($number = NULL) {
246 if (isset($number)) {
247 $this->current_page = max(0, $number);
251 // If the current page number was not specified, extract it from the global
253 global $pager_page_array;
255 if (empty($pager_page_array)) {
256 $pager_page_array = [];
259 // Fill in missing values in the global page array, in case the global page
260 // array hasn't been initialized before.
261 $page = $this->view->getRequest()->query->get('page');
262 $page = isset($page) ? explode(',', $page) : [];
264 for ($i = 0; $i <= $this->options['id'] || $i < count($pager_page_array); $i++) {
265 $pager_page_array[$i] = empty($page[$i]) ? 0 : $page[$i];
268 // Don't allow the number to be less than zero.
269 $this->current_page = max(0, intval($pager_page_array[$this->options['id']]));
272 public function getPagerTotal() {
273 if ($items_per_page = intval($this->getItemsPerPage())) {
274 return ceil($this->total_items / $items_per_page);
282 * Update global paging info.
284 * This is called after the count query has been run to set the total
285 * items available and to update the current page if the requested
286 * page is out of range.
288 public function updatePageInfo() {
289 if (!empty($this->options['total_pages'])) {
290 if (($this->options['total_pages'] * $this->options['items_per_page']) < $this->total_items) {
291 $this->total_items = $this->options['total_pages'] * $this->options['items_per_page'];
295 // Don't set pager settings for items per page = 0.
296 $items_per_page = $this->getItemsPerPage();
297 if (!empty($items_per_page)) {
298 // Dump information about what we already know into the globals.
299 global $pager_page_array, $pager_total, $pager_total_items, $pager_limits;
301 $pager_limits[$this->options['id']] = $this->options['items_per_page'];
302 // Set the item count for the pager.
303 $pager_total_items[$this->options['id']] = $this->total_items;
304 // Calculate and set the count of available pages.
305 $pager_total[$this->options['id']] = $this->getPagerTotal();
307 // See if the requested page was within range:
308 if ($this->current_page >= $pager_total[$this->options['id']]) {
309 // Pages are numbered from 0 so if there are 10 pages, the last page is 9.
310 $this->setCurrentPage($pager_total[$this->options['id']] - 1);
313 // Put this number in to guarantee that we do not generate notices when the pager
314 // goes to look for it later.
315 $pager_page_array[$this->options['id']] = $this->current_page;
319 public function usesExposed() {
320 return $this->itemsPerPageExposed() || $this->isOffsetExposed();
323 protected function itemsPerPageExposed() {
324 return !empty($this->options['expose']['items_per_page']);
327 protected function isOffsetExposed() {
328 return !empty($this->options['expose']['offset']);
331 public function exposedFormAlter(&$form, FormStateInterface $form_state) {
332 if ($this->itemsPerPageExposed()) {
333 $options = explode(',', $this->options['expose']['items_per_page_options']);
334 $sanitized_options = [];
335 if (is_array($options)) {
336 foreach ($options as $option) {
337 $sanitized_options[intval($option)] = intval($option);
339 if (!empty($this->options['expose']['items_per_page_options_all']) && !empty($this->options['expose']['items_per_page_options_all_label'])) {
340 $sanitized_options['All'] = $this->options['expose']['items_per_page_options_all_label'];
342 $form['items_per_page'] = [
344 '#title' => $this->options['expose']['items_per_page_label'],
345 '#options' => $sanitized_options,
346 '#default_value' => $this->getItemsPerPage(),
351 if ($this->isOffsetExposed()) {
353 '#type' => 'textfield',
356 '#title' => $this->options['expose']['offset_label'],
357 '#default_value' => $this->getOffset(),
362 public function exposedFormValidate(&$form, FormStateInterface $form_state) {
363 if (!$form_state->isValueEmpty('offset') && trim($form_state->getValue('offset'))) {
364 if (!is_numeric($form_state->getValue('offset')) || $form_state->getValue('offset') < 0) {
365 $form_state->setErrorByName('offset', $this->t('Offset must be an number greater or equal than 0.'));
373 public function getCacheMaxAge() {
374 return Cache::PERMANENT;
380 public function getCacheContexts() {
381 // The rendered link needs to play well with any other query parameter used
382 // on the page, like other pagers and exposed filter.
383 return ['url.query_args'];
389 public function getCacheTags() {