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/*

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 * Copyright (C) 2007-2015 Diego Perini

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 * All rights reserved.

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 *

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 * this is just a small example to show

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 * how an extension for NWMatcher could be

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 * adapted to handle special jQuery selectors

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 *

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 * Child Selectors

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 * :even, :odd, :eq, :lt, :gt, :first, :last, :nth

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 *

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 * Pseudo Selectors

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 * :has, :button, :header, :input, :checkbox, :radio, :file, :image

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 * :password, :reset, :submit, :text, :hidden, :visible, :parent

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 *

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 */

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// for structural pseudo-classes extensions

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NW.Dom.registerSelector(

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  'jquery:child',

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  /^\:((?:(nth|eq|lt|gt)\(([^()]*)\))|(?:even|odd|first|last))(.*)/i,

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  (function(global) {

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    return function(match, source, selector) {

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      var status = true, ACCEPT_NODE = NW.Dom.ACCEPT_NODE;

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      switch (match[1].toLowerCase()) {

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        case 'odd':

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          source = source.replace(ACCEPT_NODE, 'if((x=x^1)==0){' + ACCEPT_NODE + '}');

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          break;

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        case 'even':

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          source = source.replace(ACCEPT_NODE, 'if((x=x^1)==1){' + ACCEPT_NODE + '}');

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          break;

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        case 'first':

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          source = 'n=h.getElementsByTagName(e.nodeName);if(n.length&&n[0]===e){' + source + '}';

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          break;

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        case 'last':

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          source = 'n=h.getElementsByTagName(e.nodeName);if(n.length&&n[n.length-1]===e){' + source + '}';

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          break;

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        default:

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          switch (match[2].toLowerCase()) {

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            case 'nth':

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              source = 'n=h.getElementsByTagName(e.nodeName);if(n.length&&n[' + match[3] + ']===e){' + source + '}';

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              break;

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            case 'eq':

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              source = source.replace(ACCEPT_NODE, 'if(x++==' + match[3] + '){' + ACCEPT_NODE + '}');

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              break;

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            case 'lt':

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              source = source.replace(ACCEPT_NODE, 'if(x++<' + match[3] + '){' + ACCEPT_NODE + '}');

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              break;

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            case 'gt':

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              source = source.replace(ACCEPT_NODE, 'if(x++>' + match[3] + '){' + ACCEPT_NODE + '}');

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              break;

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            default:

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              status = false;

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              break;

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          }

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          break;

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      }

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      // compiler will add this to "source"

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      return global.Object({

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        'source': source,

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        'status': status

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      });

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    };

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  })(this));

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// for element pseudo-classes extensions

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NW.Dom.registerSelector(

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  'jquery:pseudo',

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  /^\:(has|checkbox|file|image|password|radio|reset|submit|text|button|input|header|hidden|visible|parent)(?:\(\s*(["']*)?([^'"()]*)\2\s*\))?(.*)/i,

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  (function(global) {

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    return function(match, source) {

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      var status = true, ACCEPT_NODE = NW.Dom.ACCEPT_NODE;

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      switch(match[1].toLowerCase()) {

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        case 'has':

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          source = source.replace(ACCEPT_NODE, 'if(e.getElementsByTagName("' + match[3].replace(/^\s|\s$/g, '') + '")[0]){' + ACCEPT_NODE + '}');

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          break;

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        case 'checkbox':

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        case 'file':

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        case 'image':

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        case 'password':

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        case 'radio':

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        case 'reset':

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        case 'submit':

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        case 'text':

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          // :checkbox, :file, :image, :password, :radio, :reset, :submit, :text

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          source = 'if(/^' + match[1] + '$/i.test(e.type)){' + source + '}';

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          break;

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        case 'button':

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        case 'input':

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          source = 'if(e.type||/button/i.test(e.nodeName)){' + source + '}';

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          break;

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        case 'header':

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          source = 'if(/h[1-6]/i.test(e.nodeName)){' + source + '}';

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          break;

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        case 'hidden':

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          source = 'if(!e.offsetWidth&&!e.offsetHeight){' + source + '}';

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          break;

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        case 'visible':

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          source = 'if(e.offsetWidth||e.offsetHeight){' + source + '}';

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          break;

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        case 'parent':

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          source += 'if(e.firstChild){' + source + '}';

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          break;

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        default:

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          status = false;

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          break;

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      }

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      // compiler will add this to "source"

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      return global.Object({

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        'source': source,

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        'status': status

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      });

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    };

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  })(this));

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