Initial commit

node_modules/nwmatcher/src/modules/nwmatcher-cache.js

@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2007-2018 Diego Perini
+ * All rights reserved.
+ *
+ * Caching/memoization module for NWMatcher
+ *
+ * Added capabilities:
+ *
+ * - Mutation Events are feature tested and used safely
+ * - handle caching different document types HTML/XML/SVG
+ * - store result sets for different selectors / contexts
+ * - simultaneously control mutation on multiple documents
+ *
+ */
+
+(function(global) {
+
+  // export the public API for CommonJS implementations,
+  // for headless JS engines or for standard web browsers
+  var Dom =
+    // as CommonJS/NodeJS module
+    typeof exports == 'object' ? exports :
+    // create or extend NW namespace
+    ((global.NW || (global.NW = { })) &&
+    (global.NW.Dom || (global.NW.Dom = { }))),
+
+  Contexts = { },
+  Results = { },
+
+  isEnabled = false,
+  isExpired = true,
+  isPaused = false,
+
+  context = global.document,
+  root = context.documentElement,
+
+  // timing pauses
+  now = 0,
+
+  // last time cache initialization was called
+  lastCalled = 0,
+
+  // minimum time allowed between calls to the cache initialization
+  minCacheRest = 15, //ms
+
+  mutationTest =
+    function(type, callback) {
+      var isSupported = false,
+      root = document.documentElement,
+      div = document.createElement('div'),
+      handler = function() { isSupported = true; };
+      root.insertBefore(div, root.firstChild);
+      div.addEventListener(type, handler, true);
+      if (callback && callback.call) callback(div);
+      div.removeEventListener(type, handler, true);
+      root.removeChild(div);
+      return isSupported;
+    },
+
+  // check for Mutation Events, DOMAttrModified should be
+  // enough to ensure DOMNodeInserted/DOMNodeRemoved exist
+  HACKED_MUTATION_EVENTS = false,
+
+  NATIVE_MUTATION_EVENTS = root.addEventListener ?
+    mutationTest('DOMAttrModified', function(e) { e.setAttribute('id', 'nw'); }) : false,
+
+  loadResults =
+    function(selector, from, doc, root) {
+      if (isEnabled && !isPaused) {
+        if (!isExpired) {
+          if (Results[selector] && Contexts[selector] === from) {
+            return Results[selector];
+          }
+        } else {
+          // pause caching while we are getting
+          // hammered by dom mutations (jdalton)
+          now = (new Date).getTime();
+          if ((now - lastCalled) < minCacheRest) {
+            isPaused = isExpired = true;
+            setTimeout(function() { isPaused = false; }, minCacheRest);
+          } else setCache(true, doc);
+          lastCalled = now;
+        }
+      }
+      return undefined;
+    },
+
+  saveResults =
+    function(selector, from, doc, data) {
+      Contexts[selector] = from;
+      Results[selector] = data;
+      return;
+    },
+
+  /*-------------------------------- CACHING ---------------------------------*/
+
+  // invoked by mutation events to expire cached parts
+  mutationWrapper =
+    function(event) {
+      var d = event.target.ownerDocument || event.target;
+      stopMutation(d);
+      expireCache(d);
+    },
+
+  // append mutation events
+  startMutation =
+    function(d) {
+      if (!d.isCaching && d.addEventListener) {
+        // FireFox/Opera/Safari/KHTML have support for Mutation Events
+        d.addEventListener('DOMAttrModified', mutationWrapper, true);
+        d.addEventListener('DOMNodeInserted', mutationWrapper, true);
+        d.addEventListener('DOMNodeRemoved',  mutationWrapper, true);
+        d.isCaching = true;
+      }
+    },
+
+  // remove mutation events
+  stopMutation =
+    function(d) {
+      if (d.isCaching && d.removeEventListener) {
+        d.removeEventListener('DOMAttrModified', mutationWrapper, true);
+        d.removeEventListener('DOMNodeInserted', mutationWrapper, true);
+        d.removeEventListener('DOMNodeRemoved',  mutationWrapper, true);
+        d.isCaching = false;
+      }
+    },
+
+  // enable/disable context caching system
+  // @d optional document context (iframe, xml document)
+  // script loading context will be used as default context
+  setCache =
+    function(enable, d) {
+      if (!!enable) {
+        isExpired = false;
+        startMutation(d);
+      } else {
+        isExpired = true;
+        stopMutation(d);
+      }
+      isEnabled = !!enable;
+    },
+
+  // expire complete cache
+  // can be invoked by Mutation Events or
+  // programmatically by other code/scripts
+  // document context is mandatory no checks
+  expireCache =
+    function(d) {
+      isExpired = true;
+      Contexts = { };
+      Results = { };
+    };
+
+  if (!NATIVE_MUTATION_EVENTS && root.addEventListener && Element && Element.prototype) {
+    if (mutationTest('DOMNodeInserted', function(e) { e.appendChild(document.createElement('div')); }) &&
+        mutationTest('DOMNodeRemoved', function(e) { e.removeChild(e.appendChild(document.createElement('div'))); })) {
+      HACKED_MUTATION_EVENTS = true;
+      Element.prototype._setAttribute = Element.prototype.setAttribute;
+      Element.prototype.setAttribute =
+        function(name, val) {
+          this._setAttribute(name, val);
+          mutationWrapper({
+            target: this,
+            type: 'DOMAttrModified',
+            attrName: name,
+            attrValue: val });
+        };
+    }
+  }
+
+  isEnabled = NATIVE_MUTATION_EVENTS || HACKED_MUTATION_EVENTS;
+
+  /*------------------------------- PUBLIC API -------------------------------*/
+
+  // save results into cache
+  Dom.saveResults = saveResults;
+
+  // load results from cache
+  Dom.loadResults = loadResults;
+
+  // expire DOM tree cache
+  Dom.expireCache = expireCache;
+
+  // enable/disable cache
+  Dom.setCache = setCache;
+
+})(this);

node_modules/nwmatcher/src/modules/nwmatcher-jquery.js

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+/*
+ * Copyright (C) 2007-2018 Diego Perini
+ * All rights reserved.
+ *
+ * this is just a small example to show
+ * how an extension for NWMatcher could be
+ * adapted to handle special jQuery selectors
+ *
+ * Child Selectors
+ * :even, :odd, :eq, :lt, :gt, :first, :last, :nth
+ *
+ * Pseudo Selectors
+ * :has, :button, :header, :input, :checkbox, :radio, :file, :image
+ * :password, :reset, :submit, :text, :hidden, :visible, :parent
+ *
+ */
+
+// for structural pseudo-classes extensions
+NW.Dom.registerSelector(
+  'jquery:child',
+  /^\:((?:(nth|eq|lt|gt)\(([^()]*)\))|(?:even|odd|first|last))(.*)/i,
+  (function(global) {
+
+    return function(match, source, selector) {
+
+      var status = true, ACCEPT_NODE = NW.Dom.ACCEPT_NODE;
+
+      switch (match[1].toLowerCase()) {
+        case 'odd':
+          source = source.replace(ACCEPT_NODE, 'if((x=x^1)==0){' + ACCEPT_NODE + '}');
+          break;
+        case 'even':
+          source = source.replace(ACCEPT_NODE, 'if((x=x^1)==1){' + ACCEPT_NODE + '}');
+          break;
+        case 'first':
+          source = 'n=h.getElementsByTagName(e.nodeName);if(n.length&&n[0]===e){' + source + '}';
+          break;
+        case 'last':
+          source = 'n=h.getElementsByTagName(e.nodeName);if(n.length&&n[n.length-1]===e){' + source + '}';
+          break;
+        default:
+          switch (match[2].toLowerCase()) {
+            case 'nth':
+              source = 'n=h.getElementsByTagName(e.nodeName);if(n.length&&n[' + match[3] + ']===e){' + source + '}';
+              break;
+            case 'eq':
+              source = source.replace(ACCEPT_NODE, 'if(x++==' + match[3] + '){' + ACCEPT_NODE + '}');
+              break;
+            case 'lt':
+              source = source.replace(ACCEPT_NODE, 'if(x++<' + match[3] + '){' + ACCEPT_NODE + '}');
+              break;
+            case 'gt':
+              source = source.replace(ACCEPT_NODE, 'if(x++>' + match[3] + '){' + ACCEPT_NODE + '}');
+              break;
+            default:
+              status = false;
+              break;
+          }
+          break;
+      }
+
+      // compiler will add this to "source"
+      return {
+        'source': source,
+        'status': status
+      };
+
+    };
+
+  })(this));
+
+// for element pseudo-classes extensions
+NW.Dom.registerSelector(
+  'jquery:pseudo',
+  /^\:(has|checkbox|file|image|password|radio|reset|submit|text|button|input|header|hidden|visible|parent)(?:\(\s*(["']*)?([^'"()]*)\2\s*\))?(.*)/i,
+  (function(global) {
+
+    return function(match, source) {
+
+      var status = true, ACCEPT_NODE = NW.Dom.ACCEPT_NODE;
+
+      switch(match[1].toLowerCase()) {
+        case 'has':
+          source = source.replace(ACCEPT_NODE, 'if(e.getElementsByTagName("' + match[3].replace(/^\s|\s$/g, '') + '")[0]){' + ACCEPT_NODE + '}');
+          break;
+        case 'checkbox':
+        case 'file':
+        case 'image':
+        case 'password':
+        case 'radio':
+        case 'reset':
+        case 'submit':
+        case 'text':
+          // :checkbox, :file, :image, :password, :radio, :reset, :submit, :text
+          source = 'if(/^' + match[1] + '$/i.test(e.type)){' + source + '}';
+          break;
+        case 'button':
+        case 'input':
+          source = 'if(e.type||/button/i.test(e.nodeName)){' + source + '}';
+          break;
+        case 'header':
+          source = 'if(/h[1-6]/i.test(e.nodeName)){' + source + '}';
+          break;
+        case 'hidden':
+          source = 'if(!e.offsetWidth&&!e.offsetHeight){' + source + '}';
+          break;
+        case 'visible':
+          source = 'if(e.offsetWidth||e.offsetHeight){' + source + '}';
+          break;
+        case 'parent':
+          source += 'if(e.firstChild){' + source + '}';
+          break;
+        default:
+          status = false;
+          break;
+      }
+
+      // compiler will add this to "source"
+      return {
+        'source': source,
+        'status': status
+      };
+
+    };
+
+  })(this));

node_modules/nwmatcher/src/modules/nwmatcher-pseudos.js

@@ -0,0 +1,308 @@
+/*
+ * Copyright (C) 2007-2018 Diego Perini
+ * All rights reserved.
+ *
+ * CSS3 pseudo-classes extension for NWMatcher
+ *
+ * Added capabilities:
+ *
+ * - structural pseudo-classes
+ *
+ * :root, :empty,
+ * :nth-child(), nth-of-type(),
+ * :nth-last-child(), nth-last-of-type(),
+ * :first-child, :last-child, :only-child
+ * :first-of-type, :last-of-type, :only-of-type
+ *
+ * - negation, language, target and UI element pseudo-classes
+ *
+ * :not(), :target, :lang(), :target
+ * :link, :visited, :active, :focus, :hover,
+ * :checked, :disabled, :enabled, :selected
+ */
+
+(function(global) {
+
+  var LINK_NODES = {
+    'a': 1, 'A': 1,
+    'area': 1, 'AREA': 1,
+    'link': 1, 'LINK': 1
+  },
+
+  root = document.documentElement,
+
+  contains = 'compareDocumentPosition' in root ?
+    function(container, element) {
+      return (container.compareDocumentPosition(element) & 16) == 16;
+    } : 'contains' in root ?
+    function(container, element) {
+      return element.nodeType == 1 && container.contains(element);
+    } :
+    function(container, element) {
+      while ((element = element.parentNode) && element.nodeType == 1) {
+        if (element === container) return true;
+      }
+      return false;
+    },
+
+  isLink =
+    function(element) {
+      return element.getAttribute('href') && LINK_NODES[element.nodeName];
+    },
+
+  isEmpty =
+    function(node) {
+      node = node.firstChild;
+      while (node) {
+        if (node.nodeType == 3 || node.nodeName > '@') return false;
+        node = node.nextSibling;
+      }
+      return true;
+    },
+
+  nthElement =
+    function(element, last) {
+      var count = 1, succ = last ? 'nextSibling' : 'previousSibling';
+      while ((element = element[succ])) {
+        if (element.nodeName > '@') ++count;
+      }
+      return count;
+    },
+
+  nthOfType =
+    function(element, last) {
+      var count = 1, succ = last ? 'nextSibling' : 'previousSibling', type = element.nodeName;
+      while ((element = element[succ])) {
+        if (element.nodeName == type) ++count;
+      }
+      return count;
+    };
+
+  NW.Dom.Snapshot['contains'] = contains;
+
+  NW.Dom.Snapshot['isLink'] = isLink;
+  NW.Dom.Snapshot['isEmpty'] = isEmpty;
+  NW.Dom.Snapshot['nthOfType'] = nthOfType;
+  NW.Dom.Snapshot['nthElement'] = nthElement;
+
+})(this);
+
+NW.Dom.registerSelector(
+  'nwmatcher:spseudos',
+  /^\:(root|empty|(?:first|last|only)(?:-child|-of-type)|nth(?:-last)?(?:-child|-of-type)\(\s*(even|odd|(?:[-+]{0,1}\d*n\s*)?[-+]{0,1}\s*\d*)\s*\))?(.*)/i,
+  (function(global) {
+
+    return function(match, source) {
+
+      var a, n, b, status = true, test, type;
+
+      switch (match[1]) {
+
+        case 'root':
+          if (match[3])
+            source = 'if(e===h||s.contains(h,e)){' + source + '}';
+          else
+            source = 'if(e===h){' + source + '}';
+          break;
+
+        case 'empty':
+          source = 'if(s.isEmpty(e)){' + source + '}';
+          break;
+
+        default:
+          if (match[1] && match[2]) {
+
+            if (match[2] == 'n') {
+              source = 'if(e!==h){' + source + '}';
+              break;
+            } else if (match[2] == 'even') {
+              a = 2;
+              b = 0;
+            } else if (match[2] == 'odd') {
+              a = 2;
+              b = 1;
+            } else {
+              b = ((n = match[2].match(/(-?\d+)$/)) ? parseInt(n[1], 10) : 0);
+              a = ((n = match[2].match(/(-?\d*)n/i)) ? parseInt(n[1], 10) : 0);
+              if (n && n[1] == '-') a = -1;
+            }
+            test = a > 1 ?
+              (/last/i.test(match[1])) ? '(n-(' + b + '))%' + a + '==0' :
+              'n>=' + b + '&&(n-(' + b + '))%' + a + '==0' : a < -1 ?
+              (/last/i.test(match[1])) ? '(n-(' + b + '))%' + a + '==0' :
+              'n<=' + b + '&&(n-(' + b + '))%' + a + '==0' : a === 0 ?
+              'n==' + b : a == -1 ? 'n<=' + b : 'n>=' + b;
+            source =
+              'if(e!==h){' +
+                'n=s[' + (/-of-type/i.test(match[1]) ? '"nthOfType"' : '"nthElement"') + ']' +
+                  '(e,' + (/last/i.test(match[1]) ? 'true' : 'false') + ');' +
+                'if(' + test + '){' + source + '}' +
+              '}';
+
+          } else if (match[1]) {
+
+            a = /first/i.test(match[1]) ? 'previous' : 'next';
+            n = /only/i.test(match[1]) ? 'previous' : 'next';
+            b = /first|last/i.test(match[1]);
+            type = /-of-type/i.test(match[1]) ? '&&n.nodeName!==e.nodeName' : '&&n.nodeName<"@"';
+            source = 'if(e!==h){' +
+              ( 'n=e;while((n=n.' + a + 'Sibling)' + type + ');if(!n){' + (b ? source :
+                'n=e;while((n=n.' + n + 'Sibling)' + type + ');if(!n){' + source + '}') + '}' ) + '}';
+
+          } else {
+
+            status = false;
+
+          }
+          break;
+      }
+
+      return {
+        'source': source,
+        'status': status
+      };
+
+    };
+
+  })(this));
+
+NW.Dom.registerSelector(
+  'nwmatcher:dpseudos',
+  /^\:(link|visited|target|active|focus|hover|checked|disabled|enabled|selected|lang\(([-\w]{2,})\)|not\(\s*(:nth(?:-last)?(?:-child|-of-type)\(\s*(?:even|odd|(?:[-+]{0,1}\d*n\s*)?[-+]{0,1}\s*\d*)\s*\)|[^()]*)\s*\))?(.*)/i,
+  (function(global) {
+
+    var doc = global.document,
+    Config = NW.Dom.Config,
+    Tokens = NW.Dom.Tokens,
+
+    reTrimSpace = RegExp('^\\s+|\\s+$', 'g'),
+
+    reSimpleNot = RegExp('^((?!:not)' +
+      '(' + Tokens.prefixes + '|' + Tokens.identifier +
+      '|\\([^()]*\\))+|\\[' + Tokens.attributes + '\\])$');
+
+    return function(match, source) {
+
+      var expr, status = true, test;
+
+      switch (match[1].match(/^\w+/)[0]) {
+
+        case 'not':
+          expr = match[3].replace(reTrimSpace, '');
+          if (Config.SIMPLENOT && !reSimpleNot.test(expr)) {
+            NW.Dom.emit('Negation pseudo-class only accepts simple selectors "' + selector + '"');
+          } else {
+            if ('compatMode' in doc) {
+              source = 'if(!' + NW.Dom.compile(expr, '', false) + '(e,s,d,h,g)){' + source + '}';
+            } else {
+              source = 'if(!s.match(e, "' + expr.replace(/\x22/g, '\\"') + '",g)){' + source +'}';
+            }
+          }
+          break;
+
+        case 'checked':
+          source = 'if((typeof e.form!=="undefined"&&(/^(?:radio|checkbox)$/i).test(e.type)&&e.checked)' +
+            (Config.USE_HTML5 ? '||(/^option$/i.test(e.nodeName)&&(e.selected||e.checked))' : '') +
+            '){' + source + '}';
+          break;
+
+        case 'disabled':
+          source = 'if(((typeof e.form!=="undefined"' +
+            (Config.USE_HTML5 ? '' : '&&!(/^hidden$/i).test(e.type)') +
+            ')||s.isLink(e))&&e.disabled===true){' + source + '}';
+          break;
+
+        case 'enabled':
+          source = 'if(((typeof e.form!=="undefined"' +
+            (Config.USE_HTML5 ? '' : '&&!(/^hidden$/i).test(e.type)') +
+            ')||s.isLink(e))&&e.disabled===false){' + source + '}';
+          break;
+
+        case 'lang':
+          test = '';
+          if (match[2]) test = match[2].substr(0, 2) + '-';
+          source = 'do{(n=e.lang||"").toLowerCase();' +
+            'if((n==""&&h.lang=="' + match[2].toLowerCase() + '")||' +
+            '(n&&(n=="' + match[2].toLowerCase() +
+            '"||n.substr(0,3)=="' + test.toLowerCase() + '")))' +
+            '{' + source + 'break;}}while((e=e.parentNode)&&e!==g);';
+          break;
+
+        case 'target':
+          source = 'if(e.id==d.location.hash.slice(1)){' + source + '}';
+          break;
+
+        case 'link':
+          source = 'if(s.isLink(e)&&!e.visited){' + source + '}';
+          break;
+
+        case 'visited':
+          source = 'if(s.isLink(e)&&e.visited){' + source + '}';
+          break;
+
+        case 'active':
+          source = 'if(e===d.activeElement){' + source + '}';
+          break;
+
+        case 'hover':
+          source = 'if(e===d.hoverElement){' + source + '}';
+          break;
+
+        case 'focus':
+          source = 'hasFocus' in doc ?
+            'if(e===d.activeElement&&d.hasFocus()&&(e.type||e.href||typeof e.tabIndex=="number")){' + source + '}' :
+            'if(e===d.activeElement&&(e.type||e.href)){' + source + '}';
+          break;
+
+        case 'selected':
+          source = 'if(/^option$/i.test(e.nodeName)&&(e.selected||e.checked)){' + source + '}';
+          break;
+
+        default:
+          status = false;
+          break;
+      }
+
+      return {
+        'source': source,
+        'status': status
+      };
+
+    };
+
+  })(this));
+
+NW.Dom.registerSelector(
+  'nwmatcher:epseudos',
+  /^((?:[:]{1,2}(?:after|before|first-letter|first-line))|(?:[:]{2,2}(?:selection|backdrop|placeholder)))?(.*)/i,
+  (function(global) {
+
+    return function(match, source) {
+
+      var status = true;
+
+      switch (match[1].match(/(\w+)$/)[0]) {
+
+        case 'after':
+        case 'before':
+        case 'first-letter':
+        case 'first-line':
+        case 'selection':
+        case 'backdrop':
+        case 'placeholder':
+          source = 'if(!(/1|11/).test(e.nodeType)){' + source + '}';
+          break;
+
+        default:
+          status = false;
+          break;
+      }
+
+      return {
+        'source': source,
+        'status': status
+      };
+
+    };
+
+  })(this));

node_modules/nwmatcher/src/modules/nwmatcher-shortcuts.js

@@ -0,0 +1,35 @@
+NW.Dom.shortcuts = (function() {
+
+  // match missing R/L context
+  var nextID = 0,
+  reLeftContext = /^[\x20\t\n\r\f]*[>+~]/,
+  reRightContext = /[>+~][\x20\t\n\r\f]*$/;
+
+  return function(selector, from, alt) {
+
+    // add left context if missing
+    if (reLeftContext.test(selector)) {
+      if (from.nodeType == 9) {
+        selector = '* ' + selector;
+      } else if (/html|body/i.test(from.nodeName)) {
+        selector = from.nodeName + ' ' + selector;
+      } else if (alt) {
+        selector = NW.Dom.shortcuts(selector, alt);
+      } else if (from.nodeType == 1 && from.id) {
+        selector = '#' + from.id + ' ' + selector;
+      } else {
+        ++nextID;
+        selector = '#' + (from.id = 'NW' + nextID) + ' ' + selector;
+        //NW.Dom.emit('Unable to resolve a context for the shortcut selector "' + selector + '"');
+      }
+    }
+
+    // add right context if missing
+    if (reRightContext.test(selector)) {
+      selector += ' *';
+    }
+
+    return selector;
+  };
+
+})();

node_modules/nwmatcher/src/modules/nwmatcher-traversal.js

@@ -0,0 +1,90 @@
+/*
+ * Element Traversal methods from Juriy Zaytsev (kangax)
+ * used to emulate Prototype up/down/previous/next methods
+ */
+
+(function(D){
+
+  // TODO: all of this needs tests
+  var match = D.match, select = D.select, root = document.documentElement,
+
+  // Use the Element Traversal API if available.
+  nextElement = 'nextElementSibling',
+  previousElement = 'previousElementSibling',
+  parentElement = 'parentElement';
+
+  // Fall back to the DOM Level 1 API.
+  if (!(nextElement in root)) nextElement = 'nextSibling';
+  if (!(previousElement in root)) previousElement = 'previousSibling';
+  if (!(parentElement in root)) parentElement = 'parentNode';
+
+  function walkElements(property, element, expr) {
+    var i = 0, isIndex = typeof expr == 'number';
+    if (typeof expr == 'undefined') {
+      isIndex = true;
+      expr = 0;
+    }
+    while ((element = element[property])) {
+      if (element.nodeType != 1) continue;
+      if (isIndex) {
+        ++i;
+        if (i == expr) return element;
+      } else if (match(element, expr)) {
+        return element;
+      }
+    }
+    return null;
+  }
+
+  /**
+   * @method up
+   * @param {HTMLElement} element element to walk from
+   * @param {String | Number} expr CSS expression or an index
+   * @return {HTMLElement | null}
+   */
+  function up(element, expr) {
+    return walkElements(parentElement, element, expr);
+  }
+  /**
+   * @method next
+   * @param {HTMLElement} element element to walk from
+   * @param {String | Number} expr CSS expression or an index
+   * @return {HTMLElement | null}
+   */
+  function next(element, expr) {
+    return walkElements(nextElement, element, expr);
+  }
+  /**
+   * @method previous
+   * @param {HTMLElement} element element to walk from
+   * @param {String | Number} expr CSS expression or an index
+   * @return {HTMLElement | null}
+   */
+  function previous(element, expr) {
+    return walkElements(previousElement, element, expr);
+  }
+  /**
+   * @method down
+   * @param {HTMLElement} element element to walk from
+   * @param {String | Number} expr CSS expression or an index
+   * @return {HTMLElement | null}
+   */
+  function down(element, expr) {
+    var isIndex = typeof expr == 'number', descendants, index, descendant;
+    if (expr === null) {
+      element = element.firstChild;
+      while (element && element.nodeType != 1) element = element[nextElement];
+      return element;
+    }
+    if (!isIndex && match(element, expr) || isIndex && expr === 0) return element;
+    descendants = select('*', element);
+    if (isIndex) return descendants[expr] || null;
+    index = 0;
+    while ((descendant = descendants[index]) && !match(descendant, expr)) { ++index; }
+    return descendant || null;
+  }
+  D.up = up;
+  D.down = down;
+  D.next = next;
+  D.previous = previous;
+})(NW.Dom);

node_modules/nwmatcher/src/modules/nwmatcher-webforms.js

@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2007-2018 Diego Perini
+ * All rights reserved.
+ *
+ * this is just a small example to show
+ * how an extension for NWMatcher could be
+ * adapted to handle WebForms/HTML5 selectors
+ *
+ * Pseudo Selectors
+ * :default, :indeterminate, :optional, :required,
+ * :valid, :invalid, :in-range, :out-of-range,
+ * :read-only, :read-write
+ * :has, :matches (not yet in a defined specification)
+ *
+ */
+
+// for UI pseudo-classes extensions (WebForms/HTML5)
+NW.Dom.registerSelector(
+  'html5:pseudos',
+  /^\:(default|indeterminate|optional|required|valid|invalid|in-range|out-of-range|read-only|read-write)(.*)/,
+  (function(global) {
+
+    return function(match, source) {
+
+      var status = true,
+
+      HTML5PseudoClasses = {
+        'default': 4, 'indeterminate': 4, 'invalid': 4, 'valid': 4,
+        'optional': 4, 'required': 4, 'read-write': 4, 'read-only': 4
+      };
+
+      switch (match[1]) {
+
+        // HTML5 UI element states (form controls)
+        case 'default':
+          // only radio buttons, check boxes and option elements
+          source = 'if(((typeof e.form!=="undefined"&&(/radio|checkbox/i).test(e.type))||/option/i.test(e.nodeName))&&(e.defaultChecked||e.defaultSelected)){' + source + '}';
+          break;
+
+        case 'indeterminate':
+          // only radio buttons, check boxes and option elements
+          source = 'if(typeof e.form!=="undefined"&&(/radio|checkbox/i).test(e.type)&&s.select("[checked]",e.form).length===0){' + source + '}';
+          break;
+
+        case 'optional':
+          // only fields for which "required" applies
+          source = 'if(typeof e.form!=="undefined"&&typeof e.required!="undefined"&&!e.required){' + source + '}';
+          break;
+
+        case 'required':
+          // only fields for which "required" applies
+          source = 'if(typeof e.form!=="undefined"&&typeof e.required!="undefined"&&e.required){' + source + '}';
+          break;
+
+        case 'read-write':
+          // only fields for which "readOnly" applies
+          source = 'if(typeof e.form!=="undefined"&&typeof e.readOnly!="undefined"&&!e.readOnly){' + source + '}';
+          break;
+
+        case 'read-only':
+          // only fields for which "readOnly" applies
+          source = 'if(typeof e.form!=="undefined"&&typeof e.readOnly!="undefined"&&e.readOnly){' + source + '}';
+          break;
+
+        case 'invalid':
+          // only fields for which validity applies
+          source = 'if(typeof e.form!=="undefined"&&typeof e.validity=="object"&&!e.validity.valid){' + source + '}';
+          break;
+
+        case 'valid':
+          // only fields for which validity applies
+          source = 'if(typeof e.form!=="undefined"&&typeof e.validity=="object"&&e.validity.valid){' + source + '}';
+          break;
+
+        case 'in-range':
+          // only fields for which validity applies
+          source = 'if(typeof e.form!=="undefined"&&' +
+            '(s.getAttribute(e,"min")||s.getAttribute(e,"max"))&&' +
+            'typeof e.validity=="object"&&!e.validity.typeMismatch&&' +
+            '!e.validity.rangeUnderflow&&!e.validity.rangeOverflow){' + source + '}';
+          break;
+
+        case 'out-of-range':
+          // only fields for which validity applies
+          source = 'if(typeof e.form!=="undefined"&&' +
+            '(s.getAttribute(e,"min")||s.getAttribute(e,"max"))&&' +
+            'typeof e.validity=="object"&&(e.validity.rangeUnderflow||e.validity.rangeOverflow)){' + source + '}';
+          break;
+
+        default:
+          status = false;
+          break;
+
+      }
+
+      // compiler will add this to "source"
+      return {
+        'source': source,
+        'status': status
+      };
+
+    };
+
+  })(this));