<?php
// $Id: template.php,v 1.1.2.6.4.3 2011-01-15 23:05:50 dvessel Exp $

/**
 * Preprocessor for page.tpl.php template file.
 */
function ninesixty_preprocess_page(&$vars, $hook) {

  // For easy printing of variables.
  $vars['logo_img'] = '';
  if (!empty($vars['logo'])) {
    $vars['logo_img'] = theme('image', array(
      'path'  => $vars['logo'],
      'alt'   => t('Home'),
      'title' => t('Home'),
    ));
  }
  $vars['linked_logo_img']  = '';
  if (!empty($vars['logo_img'])) {
    $vars['linked_logo_img'] = l($vars['logo_img'], '<front>', array(
      'attributes' => array(
        'rel'   => 'home',
        'title' => t('Home'),
      ),
      'html' => TRUE,
    ));
  }
  $vars['linked_site_name'] = '';
  if (!empty($vars['site_name'])) {
    $vars['linked_site_name'] = l($vars['site_name'], '<front>', array(
      'attributes' => array(
        'rel'   => 'home',
        'title' => t('Home'),
      ),
    ));
  }

  // Site navigation links.
  $vars['main_menu_links'] = '';
  if (isset($vars['main_menu'])) {
    $vars['main_menu_links'] = theme('links__system_main_menu', array(
      'links' => $vars['main_menu'],
      'attributes' => array(
        'id' => 'main-menu',
        'class' => array('inline', 'main-menu'),
      ),
      'heading' => array(
        'text' => t('Main menu'),
        'level' => 'h2',
        'class' => array('element-invisible'),
      ),
    ));
  }
  $vars['secondary_menu_links'] = '';
  if (isset($vars['secondary_menu'])) {
    $vars['secondary_menu_links'] = theme('links__system_secondary_menu', array(
      'links' => $vars['secondary_menu'],
      'attributes' => array(
        'id'    => 'secondary-menu',
        'class' => array('inline', 'secondary-menu'),
      ),
      'heading' => array(
        'text' => t('Secondary menu'),
        'level' => 'h2',
        'class' => array('element-invisible'),
      ),
    ));
  }

}

/**
 * Contextually adds 960 Grid System classes.
 *
 * The first parameter passed is the *default class*. All other parameters must
 * be set in pairs like so: "$variable, 3". The variable can be anything available
 * within a template file and the integer is the width set for the adjacent box
 * containing that variable.
 *
 *  class="<?php print ns('grid-16', $var_a, 6); ?>"
 *
 * If $var_a contains data, the next parameter (integer) will be subtracted from
 * the default class. See the README.txt file.
 */
function ns() {
  $args = func_get_args();
  $default = array_shift($args);
  // Get the type of class, i.e., 'grid', 'pull', 'push', etc.
  // Also get the default unit for the type to be procesed and returned.
  list($type, $return_unit) = explode('-', $default);

  // Process the conditions.
  $flip_states = array('var' => 'int', 'int' => 'var');
  $state = 'var';
  foreach ($args as $arg) {
    if ($state == 'var') {
      $var_state = !empty($arg);
    }
    elseif ($var_state) {
      $return_unit = $return_unit - $arg;
    }
    $state = $flip_states[$state];
  }

  $output = '';
  // Anything below a value of 1 is not needed.
  if ($return_unit > 0) {
    $output = $type . '-' . $return_unit;
  }
  return $output;
}

/**
 * Implements hook_css_alter.
 *
 * Alters the css based on the theme settings.
 */
function ninesixty_css_alter(&$css) {

  // Get .info defined settings.
  $settings = array();
  foreach (ns_active_themes() as $active_theme) {
    $settings += ns_theme_info('settings', array(), $active_theme);
  }

  // Get floats.
  $css_float = array();
  if (isset($settings['css_float'])) {
    $css_float = array_flip($settings['css_float']);
  }

  // Setup to replace when alternate grid columns are defined.
  $grid_replace = array();
  $ns_target  = isset($settings['ns_columns_target']) ? $settings['ns_columns_target'] : NULL;
  $ns_options = isset($settings['ns_columns_option']) ? $settings['ns_columns_option'] : NULL;
  $ns_select  = isset($settings['ns_columns_select']) ? $settings['ns_columns_select'] : NULL;
  if (isset($ns_options[$ns_select]) && $ns_target != $ns_options[$ns_select]) {
    $grid_replace[$ns_target] = $ns_options[$ns_select];
  }

  foreach ($css as $css_path => $css_data) {
    // Skip if it's not a local file.
    if ($css_data['type'] != 'file') {
      continue;
    }
    $target_path = $css_path;
    $target_name = basename($target_path);
    $target_data = &$css[$target_path];

    // Process floats.
    if (isset($css_float[$target_name])) {
      // Add it to the system css group instead of creating a new one to
      // prevent an extra linked group when the styles are aggregated.
      $target_data['group']  = CSS_SYSTEM;
      $target_data['weight'] = $target_data['weight'] - .0001;
    }

    // Process grid replacement.
    if (isset($grid_replace[$target_name])) {
      $grid_alt = str_replace($target_name, $grid_replace[$target_name], $target_path);
      if (file_exists($grid_alt)) {
        // Add alternate grid style.
        $css_new           = $target_data;
        $css_new['weight'] = $css_new['weight'] + .0001;
        $css_new['data']   = $grid_alt;
        $_css[$grid_alt]   = $css_new;
        // Remove target
        unset($css[$target_path]);
      }
    }
  }

}

/**
 * Returns the current active theme. Use this instead of the global variable.
 */
function ns_active_theme() {
  global $theme_key;
  return $theme_key;
}

/**
 * List the active sub-theme and their connected parents.
 */
function ns_active_themes() {

  $themes        = list_themes();
  $active_theme  = ns_active_theme();
  $active_themes = array($active_theme => $active_theme);
  $parent_key    = $active_theme;

  while ($parent_key && isset($themes[$parent_key]->base_theme)) {
    $parent_key                 = $themes[$themes[$parent_key]->name]->base_theme;
    $active_themes[$parent_key] = $parent_key;
  }

  return $active_themes;
}

/**
 * Get the values defined within the .info file.
 * 
 * @param $info_key
 *  (required) The key to retrieve.
 * @param $default
 *  Fall back value if nothing is found.
 * @param $theme
 *  Theme specific value. If not set, it will return the value for the active
 *  theme.
 */
function ns_theme_info($info_key, $default = NULL, $theme_key = NULL) {

  if (!isset($theme_key)) {
    $theme_key = ns_active_theme();
  }
  $list_themes = list_themes();

  return isset($list_themes[$theme_key]->info[$info_key]) ? $list_themes[$theme_key]->info[$info_key] : $default;
}