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<?php
/**
* $Header: /repository/pear/Log/Log/win.php,v 1.20 2006/07/26 05:21:47 jon Exp $
*
* @version $Revision: 1.20 $
* @package Log
*/
/**
* The Log_win class is a concrete implementation of the Log abstract
* class that logs messages to a separate browser window.
*
* The concept for this log handler is based on part by Craig Davis' article
* entitled "JavaScript Power PHP Debugging:
*
* http://www.zend.com/zend/tut/tutorial-DebugLib.php
*
* @author Jon Parise <jon@php.net>
* @since Log 1.7.0
* @package Log
*
* @example win.php Using the window handler.
*/
class Log_win extends Log
{
/**
* The name of the output window.
* @var string
* @access private
*/
var $_name = 'LogWindow';
/**
* The title of the output window.
* @var string
* @access private
*/
var $_title = 'Log Output Window';
/**
* Mapping of log priorities to styles.
* @var array
* @access private
*/
var $_styles = array(
PEAR_LOG_EMERG => 'color: red;',
PEAR_LOG_ALERT => 'color: orange;',
PEAR_LOG_CRIT => 'color: yellow;',
PEAR_LOG_ERR => 'color: green;',
PEAR_LOG_WARNING => 'color: blue;',
PEAR_LOG_NOTICE => 'color: indigo;',
PEAR_LOG_INFO => 'color: violet;',
PEAR_LOG_DEBUG => 'color: black;'
);
/**
* String buffer that holds line that are pending output.
* @var array
* @access private
*/
var $_buffer = array();
/**
* Constructs a new Log_win object.
*
* @param string $name Ignored.
* @param string $ident The identity string.
* @param array $conf The configuration array.
* @param int $level Log messages up to and including this level.
* @access public
*/
function Log_win($name, $ident = '', $conf = array(),
$level = PEAR_LOG_DEBUG)
{
$this->_id = md5(microtime());
$this->_name = $name;
$this->_ident = $ident;
$this->_mask = Log::UPTO($level);
if (isset($conf['title'])) {
$this->_title = $conf['title'];
}
if (isset($conf['styles']) && is_array($conf['styles'])) {
$this->_styles = $conf['styles'];
}
if (isset($conf['colors']) && is_array($conf['colors'])) {
foreach ($conf['colors'] as $level => $color) {
$this->_styles[$level] .= "color: $color;";
}
}
register_shutdown_function(array(&$this, '_Log_win'));
}
/**
* Destructor
*/
function _Log_win()
{
if ($this->_opened || (count($this->_buffer) > 0)) {
$this->close();
}
}
/**
* The first time open() is called, it will open a new browser window and
* prepare it for output.
*
* This is implicitly called by log(), if necessary.
*
* @access public
*/
function open()
{
if (!$this->_opened) {
$win = $this->_name;
$styles = $this->_styles;
if (!empty($this->_ident)) {
$identHeader = "$win.document.writeln('<th>Ident</th>')";
} else {
$identHeader = '';
}
echo <<< EOT
<script language="JavaScript">
$win = window.open('', '{$this->_name}', 'toolbar=no,scrollbars,width=600,height=400');
$win.document.writeln('<html>');
$win.document.writeln('<head>');
$win.document.writeln('<title>{$this->_title}</title>');
$win.document.writeln('<style type="text/css">');
$win.document.writeln('body { font-family: monospace; font-size: 8pt; }');
$win.document.writeln('td,th { font-size: 8pt; }');
$win.document.writeln('td,th { border-bottom: #999999 solid 1px; }');
$win.document.writeln('td,th { border-right: #999999 solid 1px; }');
$win.document.writeln('tr { text-align: left; vertical-align: top; }');
$win.document.writeln('td.l0 { $styles[0] }');
$win.document.writeln('td.l1 { $styles[1] }');
$win.document.writeln('td.l2 { $styles[2] }');
$win.document.writeln('td.l3 { $styles[3] }');
$win.document.writeln('td.l4 { $styles[4] }');
$win.document.writeln('td.l5 { $styles[5] }');
$win.document.writeln('td.l6 { $styles[6] }');
$win.document.writeln('td.l7 { $styles[7] }');
$win.document.writeln('</style>');
$win.document.writeln('</head>');
$win.document.writeln('<body>');
$win.document.writeln('<table border="0" cellpadding="2" cellspacing="0">');
$win.document.writeln('<tr><th>Time</th>');
$identHeader
$win.document.writeln('<th>Priority</th><th width="100%">Message</th></tr>');
</script>
EOT;
$this->_opened = true;
}
return $this->_opened;
}
/**
* Closes the output stream if it is open. If there are still pending
* lines in the output buffer, the output window will be opened so that
* the buffer can be drained.
*
* @access public
*/
function close()
{
/*
* If there are still lines waiting to be written, open the output
* window so that we can drain the buffer.
*/
if (!$this->_opened && (count($this->_buffer) > 0)) {
$this->open();
}
if ($this->_opened) {
$this->_writeln('</table>');
$this->_writeln('</body></html>');
$this->_opened = false;
}
return ($this->_opened === false);
}
/**
* Writes a single line of text to the output window.
*
* @param string $line The line of text to write.
*
* @access private
*/
function _writeln($line)
{
/* Add this line to our output buffer. */
$this->_buffer[] = $line;
/* Buffer the output until this page's headers have been sent. */
if (!headers_sent()) {
return;
}
/* If we haven't already opened the output window, do so now. */
if (!$this->_opened && !$this->open()) {
return false;
}
/* Drain the buffer to the output window. */
$win = $this->_name;
foreach ($this->_buffer as $line) {
echo "<script language='JavaScript'>\n";
echo "$win.document.writeln('" . addslashes($line) . "');\n";
echo "self.focus();\n";
echo "</script>\n";
}
/* Now that the buffer has been drained, clear it. */
$this->_buffer = array();
}
/**
* Logs $message to the output window. The message is also passed along
* to any Log_observer instances that are observing this Log.
*
* @param mixed $message String or object containing the message to log.
* @param string $priority The priority of the message. Valid
* values are: PEAR_LOG_EMERG, PEAR_LOG_ALERT,
* PEAR_LOG_CRIT, PEAR_LOG_ERR, PEAR_LOG_WARNING,
* PEAR_LOG_NOTICE, PEAR_LOG_INFO, and PEAR_LOG_DEBUG.
* @return boolean True on success or false on failure.
* @access public
*/
function log($message, $priority = null)
{
/* If a priority hasn't been specified, use the default value. */
if ($priority === null) {
$priority = $this->_priority;
}
/* Abort early if the priority is above the maximum logging level. */
if (!$this->_isMasked($priority)) {
return false;
}
/* Extract the string representation of the message. */
$message = $this->_extractMessage($message);
$message = preg_replace('/\r\n|\n|\r/', '<br />', $message);
list($usec, $sec) = explode(' ', microtime());
/* Build the output line that contains the log entry row. */
$line = '<tr>';
$line .= sprintf('<td>%s.%s</td>',
strftime('%H:%M:%S', $sec), substr($usec, 2, 2));
if (!empty($this->_ident)) {
$line .= '<td>' . $this->_ident . '</td>';
}
$line .= '<td>' . ucfirst($this->priorityToString($priority)) . '</td>';
$line .= sprintf('<td class="l%d">%s</td>', $priority, $message);
$line .= '</tr>';
$this->_writeln($line);
$this->_announce(array('priority' => $priority, 'message' => $message));
return true;
}
}
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