====== Chem plugin ====== ---- plugin ---- description: Format a molecular formula author : Ikuo Obataya email : ikuo_obataya@symplus.co.jp type : syntax lastupdate : 2008-09-29 compatible : 2006/11/06 or later depends : conflicts : similar : tags : formula chemistry science ---- [[http://www.symplus.com/legacy/wiki/en:Chem%20plugin|Details and Download]] page ^ ZIP file ^ |{{http://wiki.symplus.co.jp/lib/exe/fetch.php/computer/source/chem.zip|chem.zip}} (1KB)| This DokuWiki plugin formats a molecular formula easily. ^ Appearance |**C₂H₅O₂^-Na⁺**| ^ Without the plugin |%%C₂H₅O₂^-Na⁺%%| ^ Using Chem plugin |C2H5O2-Na+| The latest version supports to export Open Document format using [[plugin:odt|ODT]] plugin. =====Examples===== C₂H₆ C2H6 Na₂HPO₄ 12H₂O Na2HPO4 12H2O C₂H₅O₂^-Na⁺ C2H5O2|-Na+ // | is a splitter. Cl₂H₆N₂Pt²⁺ Cl2H6N2Pt2+ Al₂(SO₄)₃ Al2(SO4)3 ====== another Version ====== The original plugin works very fine. For those of you who have to write more chemical formulars and have some extra wishes like easyer syntax, nuclid-number and a nicer output in DW-pages the following suggestion could help you. __Syntax__: 92|235U3|2+ would appear as ²³⁵_{92₃²⁺; the single numbers are optional so expressions like U2+, U2, 235U or 92|235U are recognized as well as all the brackets.

__Unfortunatelly there are some limitations__:
* Due to many preg_matches the entering and leaving of DW-editmenu takes quite long
* :!: ODT-Support doesn´t work - but that´s just due to a lack of regular expressions to get the formating out. (May someone could give me a hand here)
* :!: if you use ions and have multiple elements the shifting breaks as I just optimized it for one digit. (May someone could give me a hand here)

__syntax.php__:

'Ikuo Obataya',
'email' => 'I.Obataya@gmail.com',
'date' => '2008-9-29',
'name' => 'Chemical Formula Plugin',
'desc' => 'Format chemical formula',
'url' => 'http://wiki.symplus.co.jp/computer/en/chem_plugin',
);
}

function getType(){ return 'formatting'; }
function getAllowedTypes() { return array('formatting', 'substition', 'disabled'); }
function getSort(){ return 158; }
function connectTo($mode) { $this->Lexer->addEntryPattern('(?=.*?)',$mode,'plugin_chem'); }
function postConnect() { $this->Lexer->addExitPattern('','plugin_chem'); }

function handle($match, $state, $pos, &$handler){
switch ($state) {
case DOKU_LEXER_ENTER :return array($state, '');
case DOKU_LEXER_UNMATCHED :return array($state, $match);
case DOKU_LEXER_EXIT :return array($state, '');
}
return array();
}

function render($mode, &$renderer, $data) {
if($mode == 'xhtml' || $mode=='odt'){
list($state, $match) = $data;
switch ($state) {
case DOKU_LEXER_ENTER:break;
case DOKU_LEXER_UNMATCHED:
if($mode=='xhtml'){
// xhtml
$renderer->doc .= $this->getChemFormat($match);
}
if($mode == 'odt'){
// Open document format
$renderer->doc.= $this->getOdtChemFormat($match);
}
break;
case DOKU_LEXER_EXIT:break;
}
return true;
}
return false;
}

function getChemFormat($raw){
$pattern = array( "/([A-Z][a-z]?|\)|\])([1-9][0-9]*)[\|](([\-\+][0-9]*)|([0-9]*[\-\+]))/", /* sub+ sup: Al2|2+ , H2 , )2 , ]2 */
"/([A-Ze][a-z]?|\)|\])(([\-\+][0-9]*)|([0-9]*[\-\+]))/", /* only sup: Al2- , H2+ , )2+ , ]2- */
"/([A-Z][a-z]?|\)|\])([1-9][0-9]*)/", /* only sub: Al2 , H2 , )2 , ]2 */
"/([0-9]*)[\|]([0-9]*)([A-Z][a-z]?)/", /* sup + sub: 92|235U */
"/([0-9]*)([A-Z][a-z]?)/", /* only sup: 235U */

"/Neutron/",
"/Elektron/",
"/Proton/",

"/alpha/",
"/beta/",
"/gamma/");
$replace = array( "\${1}_\${2}^\${3}",
"\${1}^\${2}",
"\${1}_\${2}",
"^\${2}_\${1}\${3}",
"^\${1}\${2}",

"¹₀n",
"⁰_-1e",
"⁰₊₁p",

"₂⁴He",
"e^-",
"γ");
return preg_replace($pattern,$replace,$raw);
}

function getOdtChemFormat($raw){
$c = $this->getChemFormat($raw);
$pattern = array( "/]*)>([^<]+)<\/sup>/",
"/]*)>([^<]+)<\/sub>/");
$replace = array( "\${2}",
"\${2}");
return preg_replace($pattern,$replace,$c);
}

}
?>}