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rcube_output.php
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rcube_output.php
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<?php
/*
+-----------------------------------------------------------------------+
| This file is part of the Roundcube PHP suite |
| Copyright (C) 2005-2012 The Roundcube Dev Team |
| |
| Licensed under the GNU General Public License version 3 or |
| any later version with exceptions for skins & plugins. |
| See the README file for a full license statement. |
| |
| CONTENTS: |
| Abstract class for output generation |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
| Author: Aleksander Machniak <alec@alec.pl> |
+-----------------------------------------------------------------------+
*/
/**
* Class for output generation
*
* @package Framework
* @subpackage View
*/
abstract class rcube_output
{
public $browser;
protected $app;
protected $config;
protected $charset = RCUBE_CHARSET;
protected $env = array();
/**
* Object constructor
*/
public function __construct()
{
$this->app = rcube::get_instance();
$this->config = $this->app->config;
$this->browser = new rcube_browser();
}
/**
* Magic getter
*/
public function __get($var)
{
// allow read-only access to $env
if ($var == 'env')
return $this->env;
return null;
}
/**
* Setter for output charset.
* To be specified in a meta tag and sent as http-header
*
* @param string $charset Charset name
*/
public function set_charset($charset)
{
$this->charset = $charset;
}
/**
* Getter for output charset
*
* @return string Output charset name
*/
public function get_charset()
{
return $this->charset;
}
/**
* Set environment variable
*
* @param string $name Property name
* @param mixed $value Property value
*/
public function set_env($name, $value)
{
$this->env[$name] = $value;
}
/**
* Environment variable getter.
*
* @param string $name Property name
*
* @return mixed Property value
*/
public function get_env($name)
{
return $this->env[$name];
}
/**
* Delete all stored env variables and commands
*/
public function reset()
{
$this->env = array();
}
/**
* Invoke display_message command
*
* @param string $message Message to display
* @param string $type Message type [notice|confirm|error]
* @param array $vars Key-value pairs to be replaced in localized text
* @param boolean $override Override last set message
* @param int $timeout Message displaying time in seconds
*/
abstract function show_message($message, $type = 'notice', $vars = null, $override = true, $timeout = 0);
/**
* Redirect to a certain url.
*
* @param mixed $p Either a string with the action or url parameters as key-value pairs
* @param int $delay Delay in seconds
*/
abstract function redirect($p = array(), $delay = 1);
/**
* Send output to the client.
*/
abstract function send();
/**
* Send HTTP headers to prevent caching a page
*/
public function nocacheing_headers()
{
if (headers_sent()) {
return;
}
header("Expires: ".gmdate("D, d M Y H:i:s")." GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s")." GMT");
// Request browser to disable DNS prefetching (CVE-2010-0464)
header("X-DNS-Prefetch-Control: off");
// We need to set the following headers to make downloads work using IE in HTTPS mode.
if ($this->browser->ie && rcube_utils::https_check()) {
header('Pragma: private');
header("Cache-Control: private, must-revalidate");
}
else {
header("Cache-Control: private, no-cache, must-revalidate, post-check=0, pre-check=0");
header("Pragma: no-cache");
}
}
/**
* Send header with expire date 30 days in future
*
* @param int Expiration time in seconds
*/
public function future_expire_header($offset = 2600000)
{
if (headers_sent())
return;
header("Expires: " . gmdate("D, d M Y H:i:s", time()+$offset) . " GMT");
header("Cache-Control: max-age=$offset");
header("Pragma: ");
}
/**
* Show error page and terminate script execution
*
* @param int $code Error code
* @param string $message Error message
*/
public function raise_error($code, $message)
{
// STUB: to be overloaded by specific output classes
fputs(STDERR, "Error $code: $message\n");
exit(-1);
}
/**
* Create an edit field for inclusion on a form
*
* @param string col field name
* @param string value field value
* @param array attrib HTML element attributes for field
* @param string type HTML element type (default 'text')
*
* @return string HTML field definition
*/
public static function get_edit_field($col, $value, $attrib, $type = 'text')
{
static $colcounts = array();
$fname = '_'.$col;
$attrib['name'] = $fname . ($attrib['array'] ? '[]' : '');
$attrib['class'] = trim($attrib['class'] . ' ff_' . $col);
if ($type == 'checkbox') {
$attrib['value'] = '1';
$input = new html_checkbox($attrib);
}
else if ($type == 'textarea') {
$attrib['cols'] = $attrib['size'];
$input = new html_textarea($attrib);
}
else if ($type == 'select') {
$input = new html_select($attrib);
$input->add('---', '');
$input->add(array_values($attrib['options']), array_keys($attrib['options']));
}
else if ($attrib['type'] == 'password') {
$input = new html_passwordfield($attrib);
}
else {
if ($attrib['type'] != 'text' && $attrib['type'] != 'hidden') {
$attrib['type'] = 'text';
}
$input = new html_inputfield($attrib);
}
// use value from post
if (isset($_POST[$fname])) {
$postvalue = rcube_utils::get_input_value($fname, rcube_utils::INPUT_POST, true);
$value = $attrib['array'] ? $postvalue[intval($colcounts[$col]++)] : $postvalue;
}
$out = $input->show($value);
return $out;
}
/**
* Convert a variable into a javascript object notation
*
* @param mixed Input value
*
* @return string Serialized JSON string
*/
public static function json_serialize($input)
{
$input = rcube_charset::clean($input);
// sometimes even using rcube_charset::clean() the input contains invalid UTF-8 sequences
// that's why we have @ here
return @json_encode($input);
}
}

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