plugins/views_plugin_style.inc

<?php

class views_plugin_style extends views_plugin {
  var $row_tokens = array();
  function init(&$view, &$display, $options = NULL) {
    $this->view = &$view;
    $this->display = &$display;

    // Overlay incoming options on top of defaults
    $this->unpack_options($this->options, isset($options) ? $options : $display->handler->get_option('style_options'));

    if ($this->uses_row_plugin() && $display->handler->get_option('row_plugin')) {
      $this->row_plugin = $display->handler->get_plugin('row');
    }

    $this->options += array(
      'grouping' => array(),
    );

    $this->definition += array(
      'uses grouping' => TRUE,
    );
  }

  function destroy() {
    parent::destroy();

    if (isset($this->row_plugin)) {
      $this->row_plugin->destroy();
    }
  }

  function uses_row_plugin() {
    return !empty($this->definition['uses row plugin']);
  }

  function uses_row_class() {
    return !empty($this->definition['uses row class']);
  }

  function uses_fields() {
    // If we use a row plugin, ask the row plugin. Chances are, we don't
    // care, it does.
    if ($this->uses_row_plugin() && !empty($this->row_plugin)) {
      return $this->row_plugin->uses_fields();
    }
    // Otherwise, maybe we do.
    return !empty($this->definition['uses fields']);
  }

  function uses_tokens() {
    if ($this->uses_row_class()) {
      $class = $this->options['row_class'];
      if (strpos($class, '[') !== FALSE || strpos($class, '!') !== FALSE || strpos($class, '%') !== FALSE) {
        return TRUE;
      }
    }
  }

  function get_row_class($row_index) {
    if ($this->uses_row_class()) {
      $class = $this->options['row_class'];
      if ($this->uses_fields() && $this->view->field) {
        $class = strip_tags($this->tokenize_value($class, $row_index));
      }

      $classes = explode(' ', $class);
      foreach ($classes as &$class) {
        $class = drupal_clean_css_identifier($class);
      }
      return implode(' ', $classes);
    }
  }

  function tokenize_value($value, $row_index) {
    if (strpos($value, '[') !== FALSE || strpos($value, '!') !== FALSE || strpos($value, '%') !== FALSE) {
      $fake_item = array(
        'alter_text' => TRUE,
        'text' => $value,
      );

      // Row tokens might be empty, for example for node row style.
      $tokens = isset($this->row_tokens[$row_index]) ? $this->row_tokens[$row_index] : array();
      if (!empty($this->view->build_info['substitutions'])) {
        $tokens += $this->view->build_info['substitutions'];
      }

      if ($tokens) {
        $value = strtr($value, $tokens);
      }
    }

    return $value;
  }

  function even_empty() {
    return !empty($this->definition['even empty']);
  }

  function option_definition() {
    $options = parent::option_definition();
    $options['grouping'] = array('default' => array());
    if ($this->uses_row_class()) {
      $options['row_class'] = array('default' => '');
    }

    return $options;
  }

  function options_form(&$form, &$form_state) {
    parent::options_form($form, $form_state);
    // Only fields-based views can handle grouping.  Style plugins can also exclude
    // themselves from being groupable by setting their "use grouping" definiton
    // key to FALSE.
    // @TODO: Document "uses grouping" in docs.php when docs.php is written.
    if ($this->uses_fields() && $this->definition['uses grouping']) {
      $options = array('' => t('- None -'));
      $field_labels = $this->display->handler->get_field_labels();
      $options += $field_labels;

      // If there are no fields, we can't group on them.
      if (count($options) > 1) {
        // This is for backward compability, when there was just a single select form.
        if (is_string($this->options['grouping'])) {
          $grouping = $this->options['grouping'];
          $this->options['grouping'] = array();
          $this->options['grouping'][0]['field'] = $grouping;
        }
        if (isset($this->options['group_rendered']) && is_string($this->options['group_rendered'])) {
          $this->options['grouping'][0]['rendered'] = $this->options['group_rendered'];
          unset($this->options['group_rendered']);
        }

        $c = count($this->options['grouping']);
        // Add a form for every grouping, plus one.
        for ($i = 0; $i <= $c; $i++) {
          $grouping = !empty($this->options['grouping'][$i]) ? $this->options['grouping'][$i] : array();
          $grouping += array('field' => '', 'rendered' => TRUE, 'rendered_strip' => FALSE);
          $form['grouping'][$i]['field'] = array(
            '#type' => 'select',
            '#title' => t('Grouping field Nr.@number', array('@number' => $i + 1)),
            '#options' => $options,
            '#default_value' => $grouping['field'],
            '#description' => t('You may optionally specify a field by which to group the records. Leave blank to not group.'),
          );
          $form['grouping'][$i]['rendered'] = array(
            '#type' => 'checkbox',
            '#title' => t('Use rendered output to group rows'),
            '#default_value' => $grouping['rendered'],
            '#description' => t('If enabled the rendered output of the grouping field is used to group the rows.'),
            '#dependency' => array(
              'edit-style-options-grouping-' . $i . '-field' => array_keys($field_labels),
            )
          );
          $form['grouping'][$i]['rendered_strip'] = array(
            '#type' => 'checkbox',
            '#title' => t('Remove tags from rendered output'),
            '#default_value' => $grouping['rendered_strip'],
            '#dependency' => array(
              'edit-style-options-grouping-' . $i . '-field' => array_keys($field_labels),
            )
          );
        }
      }
    }

    if ($this->uses_row_class()) {
      $form['row_class'] = array(
        '#title' => t('Row class'),
        '#description' => t('The class to provide on each row.'),
        '#type' => 'textfield',
        '#default_value' => $this->options['row_class'],
      );

      if ($this->uses_fields()) {
        $form['row_class']['#description'] .= ' ' . t('You may use field tokens from as per the "Replacement patterns" used in "Rewrite the output of this field" for all fields.');
      }
    }
  }

  function options_validate(&$form, &$form_state) {
    // Don't run validation on style plugins without the grouping setting.
    if (isset($form_state['values']['style_options']['grouping'])) {
      // Don't save grouping if no field is specified.
      foreach ($form_state['values']['style_options']['grouping'] as $index => $grouping) {
        if (empty($grouping['field'])) {
          unset($form_state['values']['style_options']['grouping'][$index]);
        }
      }
    }
  }

  function build_sort() { return TRUE; }

  function build_sort_post() { }

  function pre_render($result) {
    if (!empty($this->row_plugin)) {
      $this->row_plugin->pre_render($result);
    }
  }

  function render() {
    if ($this->uses_row_plugin() && empty($this->row_plugin)) {
      debug('views_plugin_style_default: Missing row plugin');
      return;
    }

    // Group the rows according to the grouping instructions, if specified.
    $sets = $this->render_grouping(
      $this->view->result,
      $this->options['grouping'],
      TRUE
    );

    return $this->render_grouping_sets($sets);
  }

  function render_grouping_sets($sets, $level = 0) {
    $output = '';
    foreach ($sets as $set) {
      $row = reset($set['rows']);
      // Render as a grouping set.
      if (is_array($row) && isset($row['group'])) {
        $output .= theme(views_theme_functions('views_view_grouping', $this->view, $this->display),
          array(
            'view' => $this->view,
            'grouping' => $this->options['grouping'][$level],
            'grouping_level' => $level,
            'rows' => $set['rows'],
            'title' => $set['group'])
        );
      }
      // Render as a record set.
      else {
        if ($this->uses_row_plugin()) {
          foreach ($set['rows'] as $index => $row) {
            $this->view->row_index = $index;
            $set['rows'][$index] = $this->row_plugin->render($row);
          }
        }

        $output .= theme($this->theme_functions(),
          array(
            'view' => $this->view,
            'options' => $this->options,
            'grouping_level' => $level,
            'rows' => $set['rows'],
            'title' => $set['group'])
        );
      }
    }
    unset($this->view->row_index);
    return $output;
  }

  function render_grouping($records, $groupings = array(), $group_rendered = NULL) {
    // This is for backward compability, when $groupings was a string containing
    // the ID of a single field.
    if (is_string($groupings)) {
      $rendered = $group_rendered === NULL ? TRUE : $group_rendered;
      $groupings = array(array('field' => $groupings, 'rendered' => $rendered));
    }

    // Make sure fields are rendered
    $this->render_fields($this->view->result);
    $sets = array();
    if ($groupings) {
      foreach ($records as $index => $row) {
        // Iterate through configured grouping fields to determine the
        // hierarchically positioned set where the current row belongs to.
        // While iterating, parent groups, that do not exist yet, are added.
        $set = &$sets;
        foreach ($groupings as $info) {
          $field = $info['field'];
          $rendered = isset($info['rendered']) ? $info['rendered'] : $group_rendered;
          $rendered_strip = isset($info['rendered_strip']) ? $info['rendered_strip'] : FALSE;
          $grouping = '';
          $group_content = '';
          // Group on the rendered version of the field, not the raw.  That way,
          // we can control any special formatting of the grouping field through
          // the admin or theme layer or anywhere else we'd like.
          if (isset($this->view->field[$field])) {
            $group_content = $this->get_field($index, $field);
            if ($this->view->field[$field]->options['label']) {
              $group_content = $this->view->field[$field]->options['label'] . ': ' . $group_content;
            }
            if ($rendered) {
              $grouping = $group_content;
              if ($rendered_strip) {
                $group_content = $grouping = strip_tags(htmlspecialchars_decode($group_content));
              }
            }
            else {
              $grouping = $this->get_field_value($index, $field);
              // Not all field handlers return a scalar value,
              // e.g. views_handler_field_field.
              if (!is_scalar($grouping)) {
                $grouping = md5(serialize($grouping));
              }
            }
          }

          // Create the group if it does not exist yet.
          if (empty($set[$grouping])) {
            $set[$grouping]['group'] = $group_content;
            $set[$grouping]['rows'] = array();
          }

          // Move the set reference into the row set of the group we just determined.
          $set = &$set[$grouping]['rows'];
        }
        // Add the row to the hierarchically positioned row set we just determined.
        $set[$index] = $row;
      }
    }
    else {
      // Create a single group with an empty grouping field.
      $sets[''] = array(
        'group' => '',
        'rows' => $records,
      );
    }

    // If this parameter isn't explicitely set modify the output to be fully
    // backward compatible to code before Views 7.x-3.0-rc2.
    // @TODO Remove this as soon as possible e.g. October 2020
    if ($group_rendered === NULL) {
      $old_style_sets = array();
      foreach ($sets as $group) {
        $old_style_sets[$group['group']] = $group['rows'];
      }
      $sets = $old_style_sets;
    }

    return $sets;
  }

  function render_fields($result) {
    if (!$this->uses_fields()) {
      return;
    }

    if (!isset($this->rendered_fields)) {
      $this->rendered_fields = array();
      $this->view->row_index = 0;
      $keys = array_keys($this->view->field);

      // If all fields have a field::access FALSE there might be no fields, so
      // there is no reason to execute this code.
      if (!empty($keys)) {
        foreach ($result as $count => $row) {
          $this->view->row_index = $count;
          foreach ($keys as $id) {
            $this->rendered_fields[$count][$id] = $this->view->field[$id]->theme($row);
          }

          $this->row_tokens[$count] = $this->view->field[$id]->get_render_tokens(array());
        }
      }
      unset($this->view->row_index);
    }

    return $this->rendered_fields;
  }

  function get_field($index, $field) {
    if (!isset($this->rendered_fields)) {
      $this->render_fields($this->view->result);
    }

    if (isset($this->rendered_fields[$index][$field])) {
      return $this->rendered_fields[$index][$field];
    }
  }

  function get_field_value($index, $field) {
    $this->view->row_index = $index;
    $value = $this->view->field[$field]->get_value($this->view->result[$index]);
    unset($this->view->row_index);
    return $value;
  }

  function validate() {
    $errors = parent::validate();

    if ($this->uses_row_plugin()) {
      $plugin = $this->display->handler->get_plugin('row');
      if (empty($plugin)) {
        $errors[] = t('Style @style requires a row style but the row plugin is invalid.', array('@style' => $this->definition['title']));
      }
      else {
        $result = $plugin->validate();
        if (!empty($result) && is_array($result)) {
          $errors = array_merge($errors, $result);
        }
      }
    }
    return $errors;
  }

  function query() {
    parent::query();
    if (isset($this->row_plugin)) {
      $this->row_plugin->query();
    }
  }
}