<?php
/*
 * @file
 * yui_button Module for Drupal 6.x
 *
 * This module allows Drupal to replace various form elements with YUI buttons.
 */

/*
 * Implementation of hook_menu()
 */
function yui_button_menu() {
  $items['admin/settings/yui_button'] = array(
    'title' => t('YUI button settings'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('yui_button_settings_form'),
    'access callback' => 'user_access',
    'access arguments' => array('administer site configuration'),
    'description' => t("View/Modify YUI button settings"),
  );

  return $items;
}

function yui_button_init() {
  //  Thank you block.module :)
  $path = drupal_get_path_alias($_GET['q']);
  $regexp = '/^('. preg_replace(array('/(\r\n?|\n)/', '/\\\\\*/', '/(^|\|)\\\\<front\\\\>($|\|)/'), array('|', '.*', '\1'. preg_quote(variable_get('site_frontpage', 'node'), '/') .'\2'), preg_quote(variable_get("yui_button_include", ''), '/')) .')$/';
 
  $yui_include = variable_get("yui_button_include", "");
  if(preg_match($regexp, $path) or empty($yui_include)) {
    ;//render_button();
  }
}

function yui_button_form_alter(&$form, $form_state, $form_id) {
  array_walk($form, '_yui_button_form_alter');
}

function _yui_button_form_alter($element, $id) {
  if (is_array($element)) {
    array_walk($element, '_yui_button_form_alter');    
  }
  switch ($element['#type']) {
    case 'button':
      render_button($id);
      break;
    case 'submit':
      render_button($id);
      break;
    case 'checkbox':
      render_button($id, 'checkbox');
      break;
    case 'radio':
      render_button($id, 'radio');
      break;
    case 'radios':
      render_button($id, 'radios');
      break;
    case 'select':
    case 'weight':
      render_button('menu-' . $id, 'menu');
      break;
  }
}

/*
 * implementation of hook_perm().
 */
function yui_button_perm() {
  $array = array('Access YUI button');

  return $array;
}

/*
 *The settings page.
 */
function yui_button_settings_form() {
  $form = array();

  return system_settings_form($form);
}

/*
 * Add the javascript/CSS needed to render the button
 */
function render_button($id, $type = 'button') {
  if (!user_access('Access YUI button')) {
    return;
  }
  
  static $radios;

  yui_add_css('button', $yui_source, '/build/fonts/fonts-min.css');
  yui_add_css('button', $yui_source, '/build/button/assets/skins/sam/button.css');
  yui_add_css('button', $yui_source, '/build/button/assets/skins/sam/menu.css');
  yui_add_js('button', $yui_source, '/build/yahoo-dom-event/yahoo-dom-event.js');
  yui_add_js('button', $yui_source, '/build/container/container_core-min.js');
  yui_add_js('button', $yui_source, '/build/menu/menu-min.js');
  yui_add_js('button', $yui_source, '/build/element/element-beta-min.js');
  yui_add_js('button', $yui_source, '/build/button/button-min.js');
  
  if ($type == 'menu') {
    drupal_add_js("
      YAHOO.util.Event.onContentReady('edit-$id', function() {
        var menu = document.createElement('input');
        var menuID = YAHOO.util.Dom.generateId(menu, 'edit-${id}-menu');
        YAHOO.util.Dom.insertBefore(menu, 'edit-$id');
        var button = new YAHOO.widget.Button(menuID, { label : 'foobar', type : '$type'" . ($type == 'menu' ? ", menu : 'edit-$id'" : '') . " });
      });", "inline", "footer");
  }
  else if ($type == 'radios' and $radios == NULL) {
    $radios = TRUE;
    drupal_add_js("
      YAHOO.util.Event.onDOMReady(function() {
        var radioGroups = YAHOO.util.Dom.getElementsByClassName('form-radios');
        for (var radioGroup in radioGroups) {
          var radioGroupID = YAHOO.util.Dom.generateId(radioGroups[radioGroup], 'form-radios-');
          var button = new YAHOO.widget.ButtonGroup(radioGroupID);
        }
      });", "inline", "footer");
  }
  else {
    drupal_add_js("
      YAHOO.util.Event.onContentReady('edit-$id', function() {
        var button = new YAHOO.widget.Button('edit-${id}', { type : '$type' });
      });", "inline", "footer");
  }
}