farmOS/themes/farm_theme/template.php

<?php
/**
 * @file
 * Farm theme template.php.
 */

/**
 * Implements hook_menu_link_alter().
 */
function farm_theme_menu_link_alter(&$item) {

  // Expand top-level menu link items by default.
  $paths = array(
    'farm/assets',
    'farm/logs',
  );
  if (in_array($item['link_path'], $paths)) {
    $item['expanded'] = TRUE;
  }
}

/**
 * Implements hook_field_widget_form_alter().
 */
function farm_theme_field_widget_form_alter(&$element, &$form_state, $context) {

  // The code below will be used to make certain fieldsets collapsible.
  // Collapsing them will be done via Javascript, instead of PHP, however,
  // because of an outstanding issue with rendering Openlayers maps in collapsed
  // fieldsets. The $collapse_js boolean variable will keep track of whether or
  // not the Javascript is necessary in the current page, and will add it at the
  // bottom of this function. The Javascript works by looking for a CSS class
  // called 'farm-theme-collapse' on the fieldsets, and collapses them.
  /**
   * @todo
   * Revert to using normal PHP `['collapsed'] = TRUE;` when the following
   * issues are fixed.
   *
   * @see https://www.drupal.org/node/2644580
   * @see https://www.drupal.org/node/2579009
   */
  $collapse_js = FALSE;

  // Put geofields into a collapsible fieldset.
  if ($context['field']['type'] == 'geofield') {

    // Exception: do not collapse geofields when adding/editing areas.
    if (!empty($context['form']['#term']) && $context['form']['#term']['vocabulary_machine_name'] == 'farm_areas') {
      return;
    }

    // Iterate through all the element children.
    $children = element_children($element);
    foreach ($children as $child) {

      // Make the parent element into a collapsible fieldset.
      $element[$child]['#type'] = 'fieldset';
      $element[$child]['#collapsible'] = TRUE;
      $element[$child]['#attributes']['class'][] = 'farm-theme-collapse';
      $collapse_js = TRUE;
    }
  }

  // Collapse field collection fieldsets by default.
  elseif ($context['field']['type'] == 'field_collection') {
    $element['#collapsible'] = TRUE;
    $element['#attributes']['class'][] = 'farm-theme-collapse';
    $collapse_js = TRUE;
  }

  // Add Javascript to collapse fieldsets.
  if ($collapse_js) {
    drupal_add_js(drupal_get_path('theme', 'farm_theme') . '/js/collapse.js');
  }
}

/**
 * Implements hook_form_alter().
 */
function farm_theme_form_alter(&$form, &$form_state, $form_id) {

  // Views Exposed (filters and sort) form:
  if ($form_id == 'views_exposed_form') {

    /* Wrap the exposed form in a Bootstrap collapsible panel. */

    // Collapsible panel ID.
    $panel_head_id = $form['#id'] . '-panel-heading';
    $panel_body_id = $form['#id'] . '-panel-body';

    // Collapse by default.
    $collapse = TRUE;

    // If the form was submitted (if there are values in $_GET other than 'q'),
    // do not collapse the form.
    if (count($_GET) > 1) {
      $collapse = FALSE;
    }

    // Set attributes depending on the collapsed state (used in HTML below).
    if ($collapse) {
      $collapse_class = '';
      $aria_expanded = 'false';
    } else {
      $collapse_class = ' in';
      $aria_expanded = 'true';
    }

    // Form prefix HTML:
    $form['#prefix'] = '
<fieldset class="panel panel-default collapsible">
  <legend class="panel-heading" role="tab" id="' . $panel_head_id . '">
    <a class="panel-title fieldset-legend collapsed" data-toggle="collapse" href="#' . $panel_body_id . '" aria-expanded="' . $aria_expanded . '" aria-controls="' . $panel_body_id . '">
      Filter/Sort
    </a>
  </legend>
  <div id="' . $panel_body_id . '" class="panel-collapse collapse' . $collapse_class . '" role="tabpanel" aria-labelledby="' . $panel_head_id . '">
    <div class="panel-body">';

    // Form suffix HTML:
    $form['#suffix'] = '
    </div>
  </div>
</fieldset>';
  }
}

/**
 * Implements hook_views_bulk_operations_form_alter().
 */
function farm_theme_views_bulk_operations_form_alter(&$form, &$form_state, $vbo) {

  // Add some JavaScript to hide the VBO buttons until items are selected.
  drupal_add_js(drupal_get_path('theme', 'farm_theme') . '/js/vbo.js');

  // Move VBO buttons to the bottom.
  $form['select']['#weight'] = 100;

  // Move the "Clone" action to the end of the list.
  if (!empty($form['select']['action::log_clone_action'])) {
    $form['select']['action::log_clone_action']['#weight'] = 100;
  }
}

/**
 * Implements hook_bootstrap_colorize_text_alter().
 */
function farm_theme_bootstrap_colorize_text_alter(&$texts) {

  // Colorize VBO action buttons.
  $texts['matches'][t('Move')] = 'default';
  $texts['matches'][t('Done')] = 'success';
  $texts['matches'][t('Not Done')] = 'danger';
  $texts['matches'][t('Reschedule')] = 'warning';
  $texts['matches'][t('Clone')] = 'default';
}

/**
 * Implements hook_entity_view_alter().
 */
function farm_theme_entity_view_alter(&$build, $type) {

  // If the entity is not a farm_asset, bail.
  if ($type != 'farm_asset') {
    return;
  }

  // Float the location information to the right.
  if (!empty($build['location'])) {

    // Wrap it in a floated div.
    $build['location']['#prefix'] = '<div class="col-md-6">';
    $build['location']['#suffix'] = '</div>';
    $build['location']['#weight'] = -99;

    // Put everything else into another div and move it to the top so it
    // aligns left.
    $build['fields'] = array(
      '#prefix' => '<div class="col-md-6">',
      '#suffix' => '</div>',
      '#weight' => -100,
    );
    $elements = element_children($build);
    foreach ($elements as $element) {
      if (!in_array($element, array('location', 'fields', 'views'))) {
        $build['fields'][$element] = $build[$element];
        unset($build[$element]);
      }
    }

    // Wrap the Views in a full-width div at the bottom.
    if (!empty($build['views'])) {
      $build['views']['#prefix'] = '<div class="col-md-12">';
      $build['views']['#suffix'] = '</div>';
      $build['views']['#weight'] = 101;
    }
  }
}

/**
 * Implements hook_page_alter().
 */
function farm_theme_page_alter(&$page) {

  // If an access denied page is displayed and the user is not logged in...
  global $user;
  $status = drupal_get_http_header('status');
  if ($status == '403 Forbidden' && empty($user->uid)) {

    // Display a link to the user login page.
    $page['content']['system_main']['login'] = array(
      '#type' => 'markup',
      '#markup' => '<p>' . l('Login to farmOS', 'user') . '</p>',
    );
  }
}

/**
 * Implements hook_preprocess_page().
 */
function farm_theme_preprocess_page(&$vars) {

  // When the farm_areas map is displayed on a page...
  if (!empty($vars['page']['content']['farm_areas'])) {

    // Wrap map and content in "col-md-6" class so they display in two columns.
    $vars['page']['content']['farm_areas']['#prefix'] = '<div class="col-md-6">';
    $vars['page']['content']['farm_areas']['#suffix'] = '</div>';
    $vars['page']['content']['system_main']['#prefix'] = '<div class="col-md-6">';
    $vars['page']['content']['system_main']['#suffix'] = '</div>';
  }

  // Remove from taxonomy term pages:
  // "There is currently no content classified with this term."
  if (isset($vars['page']['content']['system_main']['no_content'])) {
    unset($vars['page']['content']['system_main']['no_content']);
  }

  // Add "Powered by farmOS" to the footer.
  $vars['page']['footer']['farmos'] = array(
    '#type' => 'markup',
    '#prefix' => '<div style="text-align: center;"><small>',
    '#markup' => t('Powered by') . ' ' . l(t('farmOS'), 'http://farmos.org'),
    '#suffix' => '</small></div>',
  );
}

/**
 * Implements hook_preprocess_field().
 */
function farm_theme_preprocess_field(&$vars) {

  // Add a clearfix class to field_farm_images to prevent float issues.
  // @see .field-name-field-farm-images .field-item in styles.css.
  if ($vars['element']['#field_name'] == 'field_farm_images') {
    $vars['classes_array'][] = 'clearfix';
  }
}