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<?php
/**
* GeSHi - Generic Syntax Highlighter
*
* For information on how to use GeSHi, please consult the documentation
* found in the docs/ directory, or online at http://geshi.org/docs/
*
* This file is part of GeSHi.
*
* GeSHi 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.
*
* GeSHi 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 GeSHi; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* You can view a copy of the GNU GPL in the COPYING file that comes
* with GeSHi, in the docs/ directory.
*
* @package lang
* @author Nigel McNie <nigel@geshi.org>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL
* @copyright (C) 2005 Nigel McNie
* @version 1.1.0
*
*/
/**
* The GeSHiPHPDoubleStringContext class represents a PHP double string
*
* @package lang
* @author Nigel McNie <nigel@geshi.org>
* @since 1.1.0
* @version 1.1.0
* @see GeSHiStringContext, GeSHiContext
*/
class GeSHiPHPDoubleStringContext extends GeSHiStringContext
{
/**
* A cached copy of the parent name
* @var string
* @access private
*/
var $_parentName;
/**
* The regular expressions used to match variables
* in this context.
*
* {@internal Do Not Change These! The code logic
* depends on them, they are just assigned here so
* that they aren't assigned every time the
* _addParseData method is called}}
*
* @var array
* @access private
*/
var $_regexes = array(
'REGEX#(\{?\$\$?\{?[a-zA-Z_][a-zA-Z0-9_]*\}?)#',
'REGEX#(\{?\$\$?\{?[a-zA-Z_][a-zA-Z0-9_]*\[[\$a-zA-Z0-9_\s\[\]\']*\]\}?)#',
'REGEX#(\{?)(\$\$?\{?[a-zA-Z_][a-zA-Z0-9_]*)(\s*->\s*)([a-zA-Z_][a-zA-Z0-9_]*)(\}?)#'
);
/**
* Loads data for a PHP Double String Context.
*
* @var GeSHiStyler The styler to be used for this context
*/
function load (&$styler)
{
parent::load($styler);
$this->_parentName = parent::getName();
}
/**
* Adds code detected as being in this context to the parse data
*/
function _addParseData ($code, $first_char_of_next_context = '')
{
geshi_dbg('GeSHiPHPDoubleStringContext::_addParseData(' . substr($code, 0, 15) . '...)', GESHI_DBG_PARSE);
while (true) {
$earliest_data = array('pos' => false, 'len' => 0);
foreach ($this->_regexes as $regex) {
$data = geshi_get_position($code, $regex, 0, false, true); // request table
if ((false != $data['pos'] && false === $earliest_data['pos']) ||
(false !== $data['pos']) &&
(($data['pos'] < $earliest_data['pos']) ||
($data['pos'] == $earliest_data['pos'] && $data['len'] > $earliest_data['len']))) {
$earliest_data = $data;
}
}
if (false === $earliest_data['pos']) {
// No more variables in this string
break;
}
// bugfix: because we match a var, it might have been escaped.
// so only do to -1 so we can catch slash if it has been
$pos = ($earliest_data['pos']) ? $earliest_data['pos'] - 1 : 0;
$len = ($earliest_data['pos']) ? $earliest_data['len'] + 1 : $earliest_data['len'];
parent::_addParseData(substr($code, 0, $pos));
// Now the entire possible var is in:
$possible_var = substr($code, $pos, $len);
geshi_dbg('Found variable at position ' . $earliest_data['pos'] . '(' . $possible_var . ')', GESHI_DBG_PARSE);
// Check that the dollar sign that started this variable was not escaped
//$first_part = str_replace('\\\\', '', substr($code, 0, $pos));
//if ('\\' == substr($first_part, -1)) {
// If \\ before var and { is not next character after that...
if ('\\' == substr($possible_var, 0, 1) && '{' != substr($possible_var, 1, 1)) {
// This variable has been escaped, so add the escaped dollar sign
// as the correct context, and the rest of the variable (recurse to catch
// other variables inside this possible variable)
geshi_dbg('Variable was escaped', GESHI_DBG_PARSE);
$this->_styler->addParseData(substr($possible_var, 0, 2), $this->_parentName . '/esc');
$this->_addParseData(substr($possible_var, 2));
} else {
// Add first character that might have been a \\ but in fact isn't to the parent
// but only do it if we had to modify the position
if ('$' != substr($possible_var, 0, 1)) {
parent::_addParseData(substr($possible_var, 0, 1));
$possible_var = substr($possible_var, 1);
}
// Many checks could go in here...
// @todo [blocking 1.1.5] check for ${foo} variables: start { matched by end }
// because at the moment ${foo is matched for example.
if ('{' == substr($possible_var, 0, 1)) {
if ('}' == substr($possible_var, -1)) {
$start_brace = '{';
} else {
$start_brace = '';
parent::_addParseData('{');
// remove brace from $possible_var. This will only be used
// if the variable isn't an OO variable anyway...
$possible_var = substr($possible_var, 1);
}
} else {
$start_brace = '';
}
if (isset($earliest_data['tab'][5])) {
// Then we matched off the third regex - the one that does objects
// The first { if there is one, and $this (which is in index 2
$this->_styler->addParseData($start_brace . $earliest_data['tab'][2], $this->_parentName . '/var');
// The -> with any whitespace around it
$this->_styler->addParseData($earliest_data['tab'][3], $this->_parentName . '/sym0');
// The method name
$this->_styler->addParseData($earliest_data['tab'][4], $this->_parentName . '/oodynamic');
// The closing }, if any
if ($earliest_data['tab'][5]) {
if ($start_brace) {
$this->_styler->addParseData($earliest_data['tab'][5], $this->_parentName . '/var');
} else {
parent::_addParseData('}');
}
}
} else {
$this->_styler->addParseData($possible_var, $this->_parentName . '/var');
}
}
// Chop off what we have done
$code = substr($code, $earliest_data['pos'] + $earliest_data['len']);
}
// Add the rest
parent::_addParseData($code, $first_char_of_next_context);
}
}
?>
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