Initial commit

.gitignore

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+node_modules
+.nyc_output
+coverage

.travis.yml

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+sudo: false
+language: node_js
+node_js:
+  - "0.10"
+  - "0.12"
+  - "4"
+  - "5"
+  - "6"
+  - "7"

LICENSE

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+Copyright (c) 2016 Thomas Rasshofer <hello@thomasrasshofer.com>
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# CSS Selector Tree
+
+> A small helper to split CSS selectors into subjects and conditions
+
+[![Build Status](https://travis-ci.org/rasshofer/cssSelectorTree.svg)](https://travis-ci.org/rasshofer/css-selector-tree)
+[![Coverage Status](https://coveralls.io/repos/github/rasshofer/css-selector-tree/badge.svg)](https://coveralls.io/github/rasshofer/css-selector-tree)
+[![Dependency Status](https://david-dm.org/rasshofer/css-selector-tree/status.svg)](https://david-dm.org/rasshofer/css-selector-tree)
+[![Dependency Status](https://david-dm.org/rasshofer/css-selector-tree/dev-status.svg)](https://david-dm.org/rasshofer/css-selector-tree)
+
+## Installation
+
+```shell
+npm install css-selector-tree --save-dev
+```
+
+## API
+
+### cssSelectorTree.tree(selector)
+
+Accepts a CSS selector and returns its tree (subject and conditions).
+
+In case no valid CSS selector is provided, `false` is returned.
+
+### cssSelectorTree.subject(selector)
+
+Accepts a CSS selector and returns its subject.
+
+In case no valid CSS selector is provided, `false` is returned.
+
+### cssSelectorTree.conditions(selector)
+
+Accepts a CSS selector and returns its conditions.
+
+In case no valid CSS selector is provided, `false` is returned.
+
+## Changelog
+
+* 0.0.1
+  * Initial version
+
+## License
+
+Copyright (c) 2016 [Thomas Rasshofer](http://thomasrasshofer.com/)  
+Licensed under the MIT license.
+
+See LICENSE for more info.

css-selector-tree.js

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+var tokenizer = require('css-selector-tokenizer');
+
+function generateSelectorTree (selector) {
+
+  if (!selector) {
+    return false;
+  }
+
+  selector = selector.split(/,/)[0];
+
+  var parsed = tokenizer.parse(selector);
+
+  var filtered = parsed.nodes.filter(function (node) {
+    return node.type === 'selector' && node.nodes && node.nodes.length;
+  });
+
+  if (filtered.length === 0) {
+    return false;
+  }
+
+  var conditions = filtered.shift().nodes.filter(function (subnode) {
+    if (subnode.type === 'spacing') {
+      subnode.type = 'child';
+      delete subnode.value;
+    }
+    return subnode;
+  });
+
+  return conditions.reverse();
+
+}
+
+function extractSelectorSubject (selector) {
+
+  var tree = generateSelectorTree(selector);
+
+  if (tree === false) {
+    return false;
+  }
+
+  return tree[0];
+
+}
+
+function extractSelectorConditions (selector) {
+
+  var tree = generateSelectorTree(selector);
+
+  if (tree === false) {
+    return false;
+  }
+
+  return tree.slice(1);
+
+}
+
+module.exports = {
+  tree: generateSelectorTree,
+  subject: extractSelectorSubject,
+  conditions: extractSelectorConditions
+};

package.json

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+{
+  "name": "css-selector-tree",
+  "version": "0.0.1",
+  "description": "A small helper to split CSS selectors into subjects and conditions",
+  "author": {
+    "name": "Thomas Rasshofer",
+    "email": "hello@thomasrasshofer.com",
+    "url": "http://thomasrasshofer.com/"
+  },
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/rasshofer/css-selector-tree.git"
+  },
+  "bugs": {
+    "url": "https://github.com/rasshofer/css-selector-tree/issues"
+  },
+  "main": "css-selector-tree.js",
+  "keywords": [
+    "css-selector-tree",
+    "css",
+    "complexity"
+  ],
+  "devDependencies": {
+    "jshint": "^2.9.3",
+    "tap": "^7.1.1"
+  },
+  "dependencies": {
+    "css-selector-tokenizer": "^0.7.0"
+  },
+  "scripts": {
+    "test": "jshint css-selector-tree.js && tap tests.js --cov"
+  }
+}

tests.js

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+var fs = require('fs');
+var path = require('path');
+var tap = require('tap');
+var cssSelectorTree = require('./css-selector-tree');
+
+// API
+
+tap.equal(typeof cssSelectorTree, 'object');
+tap.equal(typeof cssSelectorTree.tree, 'function');
+tap.equal(typeof cssSelectorTree.subject, 'function');
+tap.equal(typeof cssSelectorTree.conditions, 'function');
+
+// Tree API
+
+tap.equal(cssSelectorTree.tree(null), false);
+tap.equal(cssSelectorTree.tree(), false);
+tap.equal(cssSelectorTree.tree(''), false);
+tap.equal(cssSelectorTree.tree(new Array(3).join(' ')), false);
+tap.deepEqual(cssSelectorTree.tree('.grid-homepage .teaser .article-title .headline'), [{
+  type: 'class',
+  name: 'headline'
+}, {
+  type: 'child'
+}, {
+  type: 'class',
+  name: 'article-title'
+}, {
+  type: 'child'
+}, {
+  type: 'class',
+  name: 'teaser'
+}, {
+  type: 'child'
+}, {
+  type: 'class',
+  name: 'grid-homepage'
+}]);
+
+// Subject API
+
+tap.equal(cssSelectorTree.subject(null), false);
+tap.equal(cssSelectorTree.subject(), false);
+tap.equal(cssSelectorTree.subject(''), false);
+tap.equal(cssSelectorTree.subject(new Array(3).join(' ')), false);
+tap.deepEqual(cssSelectorTree.subject('.grid-homepage .teaser .article-title .headline'), {
+  type: 'class',
+  name: 'headline'
+});
+
+// Conditions API
+
+tap.equal(cssSelectorTree.conditions(null), false);
+tap.equal(cssSelectorTree.conditions(), false);
+tap.equal(cssSelectorTree.conditions(''), false);
+tap.equal(cssSelectorTree.conditions(new Array(3).join(' ')), false);
+tap.deepEqual(cssSelectorTree.conditions('.grid-homepage .teaser .article-title .headline'), [{
+  type: 'child'
+}, {
+  type: 'class',
+  name: 'article-title'
+}, {
+  type: 'child'
+}, {
+  type: 'class',
+  name: 'teaser'
+}, {
+  type: 'child'
+}, {
+  type: 'class',
+  name: 'grid-homepage'
+}]);