materio-base-d7/sites/all/modules/contrib/messages/better_messages/better_messages.module

<?php

/*
Implementation of hook_init
*/
function better_messages_init() {
  drupal_add_css(drupal_get_path('module', 'better_messages') . '/better_messages_admin.css');
}

/*
Implementation of hook_menu
*/
function better_messages_menu() {
  $items = array();
  $items['admin/config/user-interface/better-messages'] = array(
    'title' => t('Better Messages settings'),
    'description' => t('Better handling of Drupal messages UI'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('better_messages_admin'),
    'access arguments' => array('administer better messages'),
    'file' => 'better_messages.inc',
  );
  return $items;
}

/**
 * Implementation of hook_perm().
 */
function better_messages_permission() {
	return array(
    'access better messages' => array(
      'title' => t('access better messages'), 
      'description' => t('access better messages.'),
    ),
		'administer better messages' => array(
      'title' => t('administer better messages'), 
      'description' => t('administer better messages.'),
    ),
  );
}

/*
Implementation of hook_theme
*/
function better_messages_theme($existing, $type, $theme, $path) {
  return array(
    'better_messages_content' => array(
    	'arguments' => array('display' => NULL),
    ),
    'better_messages' => array(
    	'template'	=> 'better_messages',
    	'arguments' => array('content' => NULL),
    ),
  );
}

/*
Implementation of hook_theme_registry_alter to add better_messages theme function
*/
function better_messages_theme_registry_alter(&$theme_registry) {
	$theme_registry['status_messages']['function'] = "theme_better_messages";
}

function theme_better_messages($display = NULL) {
	$output = '';
	$better_messages = better_messages_process_visibility();
 	$access = user_access('access better messages');
	$message = drupal_get_messages($display['display'], FALSE);
	if ($better_messages && $access && !empty($message)) {
		$disable_autoclose = array_key_exists('error', $message);
		better_messages_add_files($disable_autoclose);
		$message = theme('better_messages_content', $display['display']);
		// We save the intial output to SESSION so we can put it in <noscript> on page_preprocess
		$_SESSION['original_messages'] = $message;
		$message_skin = theme('better_messages', array('content' => $message));
		// We add a special ID so that JavaScript knows what to handle. Changing the ID will break JavaScript handling code.
		$output = "<div id=\"better-messages-wrapper\" style=\"display:none;overflow:visible;position:absolute;z-index:9999;\">\n". 
					$message_skin ."\n</div>\n";
	}
	else { $output = theme('better_messages_content', $display['display']);}
	return $output;
}

function theme_better_messages_content($display = NULL) {
	$output = '';
	$first = TRUE;
	foreach (drupal_get_messages($display) as $type => $messages) {
		$class = $first ? 'first' : '';
		$first = FALSE;
		$output .= "<h2 class=\"messages-label $type\">" . t(drupal_ucfirst($type)) . "</h2>\n";
		$output .= "<div class=\"messages $type\">\n";
		if (count($messages) > 1) {
			$output .= " <ul>\n";
			foreach ($messages as $k => $message) {
		        if ($k == 0) { $output .= "<li class='message-item first'>$message</li>"; }
		        else if ($k == count($messages) - 1) { $output .= "<li class='message-item last'>$message</li>"; }
		        else { $output .= "<li class='message-item'>$message</li>"; }
		    }
			$output .= " </ul>\n";
		}
		else { $output .= $messages[0];	}
		$output .= "</div>\n";
	}
	return $output;
}
	
/*
Preprocess the default status_messages so we add our template file here
*/
function better_messages_preprocess_page(&$vars) {
	if (isset($vars['messages'])) {
		$settings = better_messages_get_settings();
		// Check if path Better Messages is enabled for this path
		$better_messages = better_messages_process_visibility();
		$access = user_access('access better messages');
		if ($better_messages && $access) {
			$message = $vars['messages'];
			// Here comes the graceful degrade for browsers with JS disabled
			$vars['messages'] = "<noscript>\n" . $_SESSION['original_messages'] . "\n</noscript>\n";
			unset($_SESSION['original_messages']);
			$vars['closure'] .= $message;
		}
	}
}

/*
Helper function to get the settings
*/
function better_messages_get_settings() {
	$settings = array(
		'position' => 'center', 'vertical' => 0, 'horizontal' => 10, 'fixed'	=> 1,
  	'width' => '400px', 'autoclose'	=> 0,	'opendelay' => 0.3,	'disable_autoclose' => 0,
	  'show_countdown' => 1, 'hover_autoclose' => 1,
		'popin' => array('effect' => 'fadeIn', 'duration' => 'slow'),
		'popout' => array('effect' => 'fadeOut', 'duration' => 'slow'),
	  'jquery_ui' => array('draggable' => 0, 'resizable' => 0),
		'extra' => array(
			'pages' => '',
			'visibility' => 0,
		)
	);
	return variable_get('better_messages', $settings);
}

/*
Helper function to check where to popup Better Messages relative to path
*/
function better_messages_process_visibility() {
	$settings = better_messages_get_settings();
	if ($settings['extra']['pages']) {
		$path = drupal_get_path_alias($_GET['q']);
		$page_match = drupal_match_path($path, $settings['extra']['pages']);
		if ($path != $_GET['q']) {
			$page_match = $page_match || drupal_match_path($_GET['q'], $settings['extra']['pages']);
		}
		$page_match = !($settings['extra']['visibility'] xor $page_match);
	}
	else { $page_match = TRUE; }	
	return $page_match;
}

/*
Helper function to add required JS and CSS only when required
*/
function better_messages_add_files($disable_autoclose){
	$settings = better_messages_get_settings();
	drupal_add_css(drupal_get_path('module', 'better_messages') . '/skins/default/better_messages.css');
	drupal_add_js(drupal_get_path('module', 'better_messages') . '/better_messages.js');
	// Remove extra info from JS
	if (!module_exists('jquery_ui')) { 
		unset($settings['jquery_ui']); 
	}
	else {
		foreach ($settings['jquery_ui'] as $jquery_ui_setting => $value) {
			if ($value == 1) {
				jquery_ui_add(array('ui.' . $jquery_ui_setting));
			} 
		}
	}
	unset($settings['extra']);
	if ($disable_autoclose) {
	  $settings['autoclose'] = 0;
	}
	drupal_add_js(array('betterMessages' => $settings), 'setting');
}