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tt-rss/tw/tw.php

291 lines
8.1 KiB
PHTML

18 years ago
<?
/*
* tag|wall ver 0.1.4 | PHP Tag Filter |
* ---------------------------------------------------------------------
Copyright (C) 2002 Juraj 'HVGE' Durech
Copyright (C) 2002 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
* ---------------------------------------------------------------------
* tw.php
*
* main tag|wall parser core
* ---------------------------------------------------------------------
*
*/
define ("TW_PARSER_VERSION", "0.1.4");
require_once(TW_PATH."tw-tags.php");
require_once(TW_PATH."tw-errors.php");
class twParser
{
// class variables
var $text, $textlen, $textpos;
var $lang, $options;
var $output, $err, $content_off;
var $out;
var $_trans, $_flags, $_data, $_delim, $_class, $_keywords;
var $_ret,$_quit;
var $base, $_names;
// -----------------------------------------------------------------------
// USER LEVEL functions
//
/* twParser CLASS CONSTRUCTOR
*
* input:
* string $language - TW language class name ( see directory tw/lang/ )
* int $options - parser options (not used)
*/
function twParser(
$language = "TW",
$options = P_DEFAULT
)
{
$_lang = $language."_lang";
$_base = $language."_base";
require_once (TW_LANG."$_base.php");
require_once (TW_CACHE."$_lang.php");
$this->lang = new $_lang;
$this->base = $_base;
$this->options = $options;
$this->_trans = &$this->lang->trans;
$this->_flags = &$this->lang->flags;
$this->_delim = &$this->lang->delim;
$this->_ret = &$this->lang->ret;
$this->_quit = &$this->lang->quit;
$this->_names = &$this->lang->names;
$this->content_off = &$this->lang->content_off;
}
/* STRIP TAGS
*
* input:
* string $text - input string
* array $configuration - filter configuration array ( see files in directory tw/filter-setup/ )
* string $output_module - output module name ( tw/output )
* string $error_module - error module name ( tw/error )
* int $offset - offset in $text
*
* output:
* parsed string
*/
function strip_tags (
$text,
&$configuration,
$output_module = "XHTML",
$error_module = "FOO",
$offset = 0
)
{
// open modules
$_err = $error_module."_error";
require_once (TW_ERRMODULE."$_err.php");
$this->err = new $_err( $this->options );
$_out = $output_module."_output";
require_once (TW_OUTMODULE."$_out.php");
$this->output = new $_out;
// parser init
$this->text = &$text;
$this->textlen = strlen($text);
$this->text .= "IMNOTREALLYOPTIMISTIC";
$this->textpos = $offset;
$this->out = null;
// FSHL pointers init
$this->lang->pt = &$this->text;
$this->lang->pti = &$this->textpos;
$this->lang->out = &$this->out;
$this->lang->err = &$this->err;
$this->lang->output = &$this->output;
// base init
$base = &$this->base;
$this->lang->$base();
$this->lang->config_tags = array_keys($configuration);
// load initial configuration
foreach($configuration as $tag => $attributes)
{
$this->lang->config_req_attr[$tag] = null;
if(is_array($attributes))
{
$this->lang->config_attr[$tag] = array_keys($configuration[$tag]);
foreach($attributes as $attr => $command)
{
if( $command )
if( $command[0] & TW_REQ ) $this->lang->config_req_attr[$tag][] = $attr;
}
}
else
{
$this->lang->config_attr[$tag] = $attributes;
}
}
$this->lang->config = &$configuration;
// start parser
$this->parse_string ( $this->lang->initial_state );
$this->out .= $this->lang->base_end();
$this->out .= $this->output->template_end();
return $this->out;
}
function get_position() { return $this->textpos; }
function get_out() { return $this->out; }
// error wrapper
function is_error() { return $this->err->is_error(); }
function get_err_array() { return $this->err->get_err_array(); }
function get_comments() { return $this->err->get_by_mask(0x000f); }
function get_warnings() { return $this->err->get_by_mask(0x00f0); }
function get_errors() { return $this->err->get_by_mask(0x0f00); }
function get_internal() { return $this->err->get_by_mask(0xf000); }
function get_by_mask($mask) { return $this->err->get_by_mask($mask); }
function get_error_text ( $id, &$lang ) { return $this->err->get_error_text ( $id, &$lang ); }
// ---------------------------------------------------------------------------------
// LOW LEVEL functions
//
// main parser function
//
function parse_string ($state)
{
$flags = $this->_flags[$state];
$statename_n = $this->_names[$state]."_new";
// perform IN function if required
if( $flags & PF_XIO )
{
$statename_i = $this->_names[$state]."_in";
$statename_o = $this->_names[$state]."_out";
$this->lang->$statename_i();
}
$stateword = null;
while( ($word = $this->getword("isd$state")) != null )
{
if(is_array($word))
{
// word is delimiter
$newstate = $this->_trans[$state][$word[0]][XL_DSTATE];
// char back to stream (CB2S) if required
if( $this->_trans[$state][$word[0]][XL_DTYPE] )
{
if( $newstate == $state )
{
// If it is the same state, CB2S flag have different significance
// re-initialize state (call IN function)
$stateword = null;
if( $flags & PF_XIO ) $this->lang->$statename_i();
continue;
}
$this->textpos -= strlen($word[1]);
}
else
{
$stateword .= $word[1]; // add new parsed word to stateword
}
if( $newstate == $this->_ret ) // newstate is _RET from recursion
{
// perform NEW function if required
if( $flags & PF_XNEW ) $this->lang->$statename_n($stateword);
// perform OUT function if required
if( $flags & PF_XIO ) $this->lang->$statename_o($stateword);
// return from recursion
return;
}
if( $state != $newstate ) // recursion - only if it is really new state
{
// perform NEW function if required
if( $flags & PF_XNEW ) $this->lang->$statename_n($stateword);
// recursion
$this->parse_string($newstate);
// perform OUT function if required and return.
if( $flags & PF_XDONE )
{
if( $flags & PF_XIO ) $this->lang->$statename_o(null);
return;
}
continue;
}
}
else
{
// word is not delimiter
if( $flags & PF_CLEAN )
{
if(!$this->content_off)
$this->out .= str_replace("<","&gt",$word);
}
else
{
$stateword .= $word;
}
}
} //END while()
// TODO: check this OUT
// perform NEW function if required
if( $flags & PF_XNEW ) $this->lang->$statename_n($stateword);
// perform OUT function if required and return.
if( $flags & PF_XIO ) $this->lang->$statename_o($stateword);
}
// get word from stream
//
function getword ($state)
{
$result = null;
if($this->textpos < $this->textlen)
{
$del = $this->lang->$state(); // call "is delimiter" isdX function
if($del != false)
{
// actual char (or sub-string) is delimiter
$this->textpos += strlen($del[1]);
return $del;
}
else
{
// Actual char/string is not delimiter.
// Result word is between current position and first delimiter in stream
$result = $this->text[$this->textpos++];
while(($this->textpos < $this->textlen) && !$this->lang->$state())
$result .= $this->text[$this->textpos++];
}
}
return $result;
}
} // END class twParser
?>