Re: [Phpwiki-talk] <code></code> tags [was <pre> tags]

[Steve W. <sw...@pa...>]

Can I do:

<code>

<script language="Javascript">
alert("hello sailor!);
</script>

</code>

If so, this is a security breach...

~swain

On Thu, 6 Dec 2001, Lawrence Akka wrote:

> I have patched lib/transform.php (cvs as of today) to enable a new
> formatting rule.
>
> A line beginning <code> will switch wiki formatting off, until a line
> beginning </code>
>
> It is now easier to cut and paste large chunks of code into a wiki, without
> all the ['s creating automatic links.
>
> In other words:
>
> test
> <code>
> This is a __wiki test__.  $array['index']
> </code>
> test
>
> will display as
>
> test
>
> This is a __wiki test__. $array['index']
>
> test
>
> I would appreciate feedback on this:
>
> *  Is it useful?
> *  Does it work?
> *  Should <code></code> be something else?
> *  Should it go into the cvs?
>
> At the moment I am aware of one problem - an extra blank line seems to be
> inserted after the end of the code
>
> Thanks
>
> Lawrence Akka
>
>
> Context diff follows:
>
>
> *** transform.old.php	Thu Dec  6 14:21:31 2001
> --- transform.php	Thu Dec  6 14:29:43 2001
> ***************
> *** 1,10 ****
> ! <?php rcs_id('$Id: transform.php,v 1.27 2001/11/16 22:59:02 dairiki Exp $');
>    require_once('lib/WikiPlugin.php');
>
>    define('WT_SIMPLE_MARKUP', 0);
>    define('WT_TOKENIZER', 1);
>    define('WT_MODE_MARKUP', 2);
> !
>    define("ZERO_LEVEL", 0);
>    define("NESTED_LEVEL", 1);
>
> --- 1,10 ----
> ! <?php rcs_id('$Id: transform.php,v 1.4 2001/11/27 10:44:32 lakka Exp $');
>    require_once('lib/WikiPlugin.php');
>
>    define('WT_SIMPLE_MARKUP', 0);
>    define('WT_TOKENIZER', 1);
>    define('WT_MODE_MARKUP', 2);
> ! define('WT_NO_MARKUP', 4);
>    define("ZERO_LEVEL", 0);
>    define("NESTED_LEVEL", 1);
>
> ***************
> *** 15,20 ****
> --- 15,21 ----
>       var $replacements;	// storage for tokenized strings of current line
>       var $user_data;	// can be used by the transformer functions
>                            // to store miscellaneous data.
> +    var $MarkupEnabled;  // flag to determine whether markup shoud be
> transformed.  added by LA
>
>       // private variables
>       var $content;	// wiki markup, array of lines
> ***************
> *** 27,32 ****
> --- 28,34 ----
>       {
>          $this->trfrm_func = array();
>          $this->stack = new Stack;
> +       $this->MarkupEnabled = 1;  // Added by LA
>       }
>
>       /**
> ***************
> *** 241,246 ****
> --- 243,256 ----
>    	      list($flags, $func, $regexp) = current($this->trfrm_func);
>    	      next($this->trfrm_func)) {
>
> + 	    // if MarkupEnabled is not set then ignore all further markup,
> + 	    // except WT_NO_MARKUP functions (or we couldn't turn markup
> + 	    // back on again (!), and wtm_specialchars (to remove html)
> + 	    // Added by LA
> +
> + 	    if (!$this->MarkupEnabled && !($flags & WT_NO_MARKUP) && $func !=
> 'wtm_htmlchars')
> + 		continue;
> +
>    	    // if HTMLmode is already set then skip all following
>    	    // WT_MODE_MARKUP functions
>    	    if ($this->mode_set && ($flags & WT_MODE_MARKUP) != 0)
> ***************
> *** 316,321 ****
> --- 326,332 ----
>    // register functions
>    // functions are applied in order of registering
>
> + $transform->register(WT_NO_MARKUP, 'wtm_no_markup', '^<code>|^<\/code>');
> //Added by LA
>    $transform->register(WT_SIMPLE_MARKUP, 'wtm_plugin_link');
>    $transform->register(WT_MODE_MARKUP, 'wtm_plugin');
>
> ***************
> *** 643,648 ****
> --- 654,673 ----
>       function wtm_paragraph($line, &$trfrm) {
>          $line = $trfrm->SetHTMLMode('p') . $line;
>          return $line;
> +    }
> +
> +    // No markup between <code>, </code>.  Added by LA
> +    function wtm_no_markup($line, &$trfrm) {
> +        if (preg_match('/^<code>(.*)/', $line, $m)) {
> +            $trfrm->MarkupEnabled = 0;
> +            $line = $trfrm->SetHTMLMode('pre').$m[1];
> +        echo 'on';
> +        } elseif (preg_match('/^<\/code>(.*)/', $line, $m)) {
> + 	   $trfrm->MarkupEnabled = 1;
> + 	   $line = $trfrm->SetHTMLMode('',0).$m[1];
> + 	   echo 'off';
> +        }
> +        return $line;
>       }
>
>    // (c-file-style: "gnu")
>
>
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