471 lines
12 KiB
PHP
471 lines
12 KiB
PHP
<?
|
|
/*
|
|
* tag|wall | PHP Tag Filter |
|
|
* ---------------------------------------------------------------------
|
|
|
|
Copyright (C) 2002 Juraj 'HVGE' Durech
|
|
Copyright (C) 2002 www.designia.sk
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
* ---------------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* $this->pt text
|
|
* $this->pti text index
|
|
*/
|
|
class TW_base // TW_lang extends this class
|
|
{
|
|
var $error; // error module object
|
|
var $output; // output module object
|
|
var $out; // output string
|
|
|
|
var $content_off;
|
|
|
|
var $tags; // relationships between tags
|
|
var $config; // current configuration (twParser::strip_tags())
|
|
var $config_tags; // tags in current configuration
|
|
var $config_attr; // attributes in current configuration
|
|
var $config_req_attr; // required attributes
|
|
|
|
|
|
var $TAG;
|
|
var $is_attributes;
|
|
var $ATTRIBUTES; // index => array("atr","value")
|
|
var $ATTR; // array(atr,value)
|
|
var $VALUE;
|
|
|
|
/********************************************************************************************
|
|
* BASE CONSTRUCTOR
|
|
*/
|
|
function TW_base()
|
|
{
|
|
global $tw_tag_relations;
|
|
|
|
$this->stack();
|
|
$this->tags = &$tw_tag_relations;
|
|
$this->content_off = 0;
|
|
}
|
|
/*
|
|
* BASE "DESTRUCTOR" (parser call this function if end of string is rached)
|
|
*/
|
|
function base_end()
|
|
{
|
|
while( $tag = $this->stack_pop() )
|
|
{
|
|
$this->out .= $this->output->close( $tag );
|
|
}
|
|
return null;
|
|
}
|
|
|
|
|
|
/********************************************************************************************
|
|
* TAG STACK implementation
|
|
*/
|
|
var $Tstack;
|
|
|
|
function stack() { $this->Tstack[0] = null; }
|
|
function stack_push( $tag ) { array_unshift( $this->Tstack, $tag ); }
|
|
function stack_pop() { return array_shift( $this->Tstack ); }
|
|
function stack_search( $tag ) { return in_array( $tag, $this->Tstack ); }
|
|
|
|
function stack_top( $tag = null )
|
|
{
|
|
if( $tag ) return $this->Tstack[0] == $tag;
|
|
return $this->Tstack[0];
|
|
}
|
|
|
|
|
|
|
|
|
|
/********************************************************************************************
|
|
* S T A R T _ T A G _ f i l t e r <tag atr=value>
|
|
*
|
|
*/
|
|
|
|
function START_TAG_filter()
|
|
{
|
|
$tag = $this->TAG;
|
|
if( $tag == null )
|
|
{
|
|
//###### syntax error
|
|
return;
|
|
}
|
|
if( in_array($tag,$this->config_tags) )
|
|
{
|
|
//enabled tag
|
|
|
|
if(is_string($this->config_attr[$tag]))
|
|
{
|
|
$this->TAG = $tag = $this->config_attr[$tag];
|
|
//tag substitution warning
|
|
}
|
|
|
|
// ------- perform attribute check -----------
|
|
|
|
if($this->is_attributes)
|
|
{
|
|
if(!$this->config_attr[$tag])
|
|
{
|
|
$this->ATTRIBUTES = null;
|
|
// remove attribute warning
|
|
}
|
|
else
|
|
{
|
|
foreach( $this->ATTRIBUTES as $key => $attr )
|
|
{
|
|
if( ! in_array($attr[0], $this->config_attr[$tag] ) )
|
|
{
|
|
$this->ATTRIBUTES[$key][1] = null;
|
|
// remove attribute warning
|
|
continue;
|
|
}
|
|
|
|
// --------- perform value check -----------
|
|
|
|
if(($val = $attr[1])==null) continue;
|
|
if(($cmda = &$this->config[$tag][$attr[0]])==null) continue; //null - accept all values
|
|
switch($cmda[0] & 7)
|
|
{
|
|
case TW_URL:
|
|
// V0.1.2: fixed some fatal bugs, big thanx to fczbkk
|
|
//
|
|
// TODO: make better url check with parse_url()
|
|
|
|
$val = strtolower($val);
|
|
if(strpos($val, "http://") === false)
|
|
{
|
|
if(strpos($val, "ftp://") === false)
|
|
if(strpos($val, "email:") === false)
|
|
if(strpos($val, "https://") === false)
|
|
if(strpos($val, "./") === false) // local relative url
|
|
$val = "http://".$val;
|
|
}
|
|
$this->ATTRIBUTES[$key][1] = $val;
|
|
break;
|
|
|
|
case TW_LINK:
|
|
//TODO: add link separator check here.
|
|
// Do not use this attribute in config!
|
|
break;
|
|
|
|
case TW_NUM:
|
|
if( $val >= $cmda[2] && $val <= $cmda[3] ) break;
|
|
$this->ATTRIBUTES[$key][1] = $cmda[1];
|
|
break;
|
|
|
|
case TW_CASE:
|
|
if( !in_array($val, $cmda[2]) ) $this->ATTRIBUTES[$key][1] = $cmda[1];
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// check required attributes
|
|
if($this->config_req_attr[$tag])
|
|
{
|
|
if( $this->is_attributes )
|
|
foreach( $this->config_req_attr[$tag] as $required )
|
|
{
|
|
$req_found = 0;
|
|
foreach( $this->ATTRIBUTES as $val)
|
|
if( $val[0] == $required )
|
|
{
|
|
$req_found = 1;
|
|
break;
|
|
}
|
|
if($req_found) continue;
|
|
|
|
switch( $this->config[$tag][$required][0] & 7 )
|
|
{
|
|
case TW_LINK:
|
|
case TW_URL:
|
|
// error
|
|
break;
|
|
|
|
default:
|
|
$this->ATTRIBUTES[$required] = array($required, $this->config[$tag][$required][1]);
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
foreach( $this->config_req_attr[$tag] as $required )
|
|
{
|
|
switch( $this->config[$tag][$required][0] & 7 )
|
|
{
|
|
case TW_LINK:
|
|
case TW_URL:
|
|
|
|
// required tag error
|
|
|
|
break;
|
|
|
|
default:
|
|
$this->ATTRIBUTES[$required] = array($required, $this->config[$tag][$required][1]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
// cross tag removal algorithm
|
|
|
|
$flag = $this->tags[$tag];
|
|
$top = $this->stack_top();
|
|
|
|
if( $flag[2] != null ) // check if tag before is specified
|
|
{
|
|
// yes, tag before is specified, check relationship
|
|
if(! in_array($top, $flag[2]) )
|
|
{
|
|
if( $flag[0] & TW_OPT )
|
|
{
|
|
if( $top == $tag )
|
|
{
|
|
// End Tag is optional and current tag is the same as last tag (on stack).
|
|
// Close previos for XHTML compatibility and open new the same tag.
|
|
// Return, because no manipulation with stack is required.
|
|
$this->out .= $this->output->close( $tag );
|
|
$this->out .= $this->output->pair( $tag, $this->ATTRIBUTES );
|
|
return;
|
|
}
|
|
if( $this->stack_search($tag) )
|
|
{
|
|
// repair stack
|
|
while(($top = $this->stack_pop() ) != $tag )
|
|
{
|
|
/*if( !($this->tags[$top][0] & TW_OPT ) )
|
|
{
|
|
// auto close warning
|
|
}*/
|
|
$this->out .= $this->output->close( $top );
|
|
}
|
|
$this->stack_push($tag);
|
|
$this->out .= $this->output->close( $tag );
|
|
$this->out .= $this->output->pair( $tag, $this->ATTRIBUTES );
|
|
return;
|
|
}
|
|
}
|
|
// <th>...<td> =>> <th>...</th><td>... (<th> & <td> they have common parent tag (<tr>) )
|
|
if( $this->tags[$top][0] & TW_OPT )
|
|
{
|
|
if( $this->tags[$top][2] == $flag[2] )
|
|
{
|
|
$this->out .= $this->output->close( $this->stack_pop() );
|
|
$this->out .= $this->output->pair( $tag, $this->ATTRIBUTES );
|
|
$this->stack_push( $tag );
|
|
return;
|
|
}
|
|
}
|
|
// invalid relation between tags #######
|
|
return;
|
|
}
|
|
// valid relationship
|
|
}
|
|
if( $flag[0] & TW_NOP )
|
|
{
|
|
//tag without End Tag <br />
|
|
$this->out .= $this->output->single( $tag, $this->ATTRIBUTES );
|
|
}
|
|
else
|
|
{
|
|
//Tag with End Tag, push to stack
|
|
if( ($top == $tag) && ($flag[0] & TW_OPT) )
|
|
{
|
|
// '<p><p>' => '<p></p><p>'
|
|
$this->out .= $this->output->close( $tag );
|
|
$this->out .= $this->output->pair( $tag, $this->ATTRIBUTES );
|
|
return;
|
|
}
|
|
$this->out .= $this->output->pair( $tag, $this->ATTRIBUTES );
|
|
$this->stack_push( $tag );
|
|
}
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
//disabled tag (or not supported) ######
|
|
return;
|
|
}
|
|
}
|
|
|
|
/********************************************************************************************
|
|
* E N D _ T A G _ f i l t e r </tag>
|
|
*
|
|
*/
|
|
function END_TAG_filter()
|
|
{
|
|
$tag = $this->TAG;
|
|
if( $tag == null )
|
|
{
|
|
// </>
|
|
if ($tag = $this->stack_pop() )
|
|
{
|
|
$this->out .= $this->output->close($tag);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
// kunda underflow :)
|
|
return;
|
|
}
|
|
}
|
|
if(in_array($tag,$this->config_tags))
|
|
{
|
|
// enabled tag
|
|
if(is_string($this->config_attr[$tag]))
|
|
{
|
|
$this->TAG = $tag = $this->config_attr[$tag];
|
|
//tag substitution warning
|
|
}
|
|
|
|
$top = $this->stack_top( $tag );
|
|
if( $top )
|
|
{
|
|
$this->out .= $this->output->close( $tag );
|
|
$this->stack_pop();
|
|
return;
|
|
}
|
|
|
|
if( $this->stack_search($tag) )
|
|
{
|
|
// closing cross tags
|
|
while( ($top = $this->stack_pop()) != $tag )
|
|
{
|
|
/*if( !($this->tags[$top][0] & TW_OPT ) )
|
|
{
|
|
// auto close warning
|
|
}*/
|
|
$this->out .= $this->output->close( $top );
|
|
}
|
|
$this->out .= $this->output->close( $tag );
|
|
}
|
|
else
|
|
{
|
|
// ###### cross tag error
|
|
return;
|
|
}
|
|
}
|
|
// drop out warning
|
|
}
|
|
|
|
|
|
/*
|
|
* THERE ARE STATE IN, OUT & NEW FUNCTIONS
|
|
*
|
|
*/
|
|
|
|
/********************************************************************************************
|
|
* STATE T_begin '<'
|
|
*/
|
|
function T_begin_in()
|
|
{
|
|
$this->tag_position = $this->pti;
|
|
$this->TAG = null;
|
|
}
|
|
|
|
// --- MAIN TAG-FILTER FUNCTION ---
|
|
|
|
function T_begin_out($word)
|
|
{
|
|
$this->START_TAG_filter();
|
|
}
|
|
|
|
/********************************************************************************************
|
|
* STATE TC_begin '</'
|
|
*/
|
|
function T_Cbegin_in()
|
|
{
|
|
$this->tag_position = $this->pti;
|
|
$this->TAG = null;
|
|
}
|
|
|
|
// TAG CLOSE function
|
|
//
|
|
function T_Cbegin_out($word)
|
|
{
|
|
$this->END_TAG_filter();
|
|
}
|
|
|
|
/********************************************************************************************
|
|
* STATE T_gettag 'tagname'
|
|
*/
|
|
function T_gettag_in()
|
|
{
|
|
$this->is_attributes = 0;
|
|
$this->ATTRIBUTES = null;
|
|
return;
|
|
}
|
|
|
|
function T_gettag_new($word) { $this->TAG = strtolower($word); }
|
|
function T_gettag_out($word) { return; }
|
|
|
|
/********************************************************************************************
|
|
* STATE A_begin '__atr...'
|
|
*/
|
|
function A_begin_in() { $this->ATTR = null; }
|
|
function A_begin_new($word) { $this->ATTR[0] = strtolower($word); }
|
|
function A_begin_out($word)
|
|
{
|
|
if( $this->is_attributes )
|
|
{
|
|
foreach( $this->ATTRIBUTES as $akey => $aval )
|
|
{
|
|
if($this->ATTR[0] == $aval[0])
|
|
{
|
|
// duplicate warning
|
|
$this->ATTRIBUTES[$akey] = $aval;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
$this->is_attributes = 1;
|
|
}
|
|
$this->ATTRIBUTES[] = $this->ATTR;
|
|
}
|
|
|
|
/********************************************************************************************
|
|
* STATE V_begin 'atr...'
|
|
*/
|
|
function V_begin_in() { $this->VALUE = null; }
|
|
function V_begin_out($word) { $this->ATTR[1] = $this->VALUE; }
|
|
|
|
/********************************************************************************************
|
|
* STATE VALUE1
|
|
*/
|
|
function VALUE1_in() { return; }
|
|
function VALUE1_out($word) { $this->VALUE = substr($word,0,strlen($word)-1); }
|
|
|
|
/********************************************************************************************
|
|
* STATE VALUE2
|
|
*/
|
|
function VALUE2_in() { return; }
|
|
function VALUE2_out($word)
|
|
{
|
|
$this->VALUE = str_replace("\"", """, substr($word, 0, strlen($word)-1) );
|
|
}
|
|
/********************************************************************************************
|
|
* STATE VALUE3
|
|
*/
|
|
function VALUE3_in() { return; }
|
|
function VALUE3_out($word) { $this->VALUE = $word; }
|
|
|
|
|
|
} // END class TW_base
|
|
?>
|