implement pinch to zoom

node_modules/component-matches-selector/test/index.html

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+<html>
+  <head>
+    <title>Mocha</title>
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <link rel="stylesheet" href="mocha.css" />
+  </head>
+  <body>
+    <div id="mocha"></div>
+    <script src="mocha.js"></script>
+    <script>mocha.setup('bdd')</script>
+    <script src="../build/build.js"></script>
+    <script src="tests.js"></script>
+    <script>
+      mocha.run();
+    </script>
+  </body>
+</html>

node_modules/component-matches-selector/test/mocha.css

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+@charset "UTF-8";
+body {
+  font: 20px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
+  padding: 60px 50px;
+}
+
+#mocha ul, #mocha li {
+  margin: 0;
+  padding: 0;
+}
+
+#mocha ul {
+  list-style: none;
+}
+
+#mocha h1, #mocha h2 {
+  margin: 0;
+}
+
+#mocha h1 {
+  margin-top: 15px;
+  font-size: 1em;
+  font-weight: 200;
+}
+
+#mocha h1 a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha h1 a:hover {
+  text-decoration: underline;
+}
+
+#mocha .suite .suite h1 {
+  margin-top: 0;
+  font-size: .8em;
+}
+
+#mocha h2 {
+  font-size: 12px;
+  font-weight: normal;
+  cursor: pointer;
+}
+
+#mocha .suite {
+  margin-left: 15px;
+}
+
+#mocha .test {
+  margin-left: 15px;
+}
+
+#mocha .test:hover h2::after {
+  position: relative;
+  top: 0;
+  right: -10px;
+  content: '(view source)';
+  font-size: 12px;
+  font-family: arial;
+  color: #888;
+}
+
+#mocha .test.pending:hover h2::after {
+  content: '(pending)';
+  font-family: arial;
+}
+
+#mocha .test.pass.medium .duration {
+  background: #C09853;
+}
+
+#mocha .test.pass.slow .duration {
+  background: #B94A48;
+}
+
+#mocha .test.pass::before {
+  content: '✓';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #00d6b2;
+}
+
+#mocha .test.pass .duration {
+  font-size: 9px;
+  margin-left: 5px;
+  padding: 2px 5px;
+  color: white;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -moz-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -webkit-border-radius: 5px;
+  -moz-border-radius: 5px;
+  -ms-border-radius: 5px;
+  -o-border-radius: 5px;
+  border-radius: 5px;
+}
+
+#mocha .test.pass.fast .duration {
+  display: none;
+}
+
+#mocha .test.pending {
+  color: #0b97c4;
+}
+
+#mocha .test.pending::before {
+  content: '◦';
+  color: #0b97c4;
+}
+
+#mocha .test.fail {
+  color: #c00;
+}
+
+#mocha .test.fail pre {
+  color: black;
+}
+
+#mocha .test.fail::before {
+  content: '✖';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #c00;
+}
+
+#mocha .test pre.error {
+  color: #c00;
+}
+
+#mocha .test pre {
+  display: inline-block;
+  font: 12px/1.5 monaco, monospace;
+  margin: 5px;
+  padding: 15px;
+  border: 1px solid #eee;
+  border-bottom-color: #ddd;
+  -webkit-border-radius: 3px;
+  -webkit-box-shadow: 0 1px 3px #eee;
+}
+
+#report.pass .test.fail {
+  display: none;
+}
+
+#report.fail .test.pass {
+  display: none;
+}
+
+#error {
+  color: #c00;
+  font-size: 1.5  em;
+  font-weight: 100;
+  letter-spacing: 1px;
+}
+
+#stats {
+  position: fixed;
+  top: 15px;
+  right: 10px;
+  font-size: 12px;
+  margin: 0;
+  color: #888;
+}
+
+#stats .progress {
+  float: right;
+  padding-top: 0;
+}
+
+#stats em {
+  color: black;
+}
+
+#stats a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#stats a:hover {
+  border-bottom: 1px solid #eee;
+}
+
+#stats li {
+  display: inline-block;
+  margin: 0 5px;
+  list-style: none;
+  padding-top: 11px;
+}
+
+code .comment { color: #ddd }
+code .init { color: #2F6FAD }
+code .string { color: #5890AD }
+code .keyword { color: #8A6343 }
+code .number { color: #2F6FAD }

node_modules/component-matches-selector/test/tests.js

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+
+var matches = require('matches-selector')
+  , domify = require('domify');
+
+function assert(expr) {
+  if (!expr) throw new Error('assertion failed');
+}
+
+var ul = domify('<ul><li><em>foo</em></li></ul>');
+var li = ul.children[0];
+var em = li.children[0];
+
+describe('matchesSelector(el, selector)', function(){
+  it('should work', function(){
+    assert(true === matches(em, 'ul li em'));
+    assert(true === matches(em, 'ul em'));
+    assert(true === matches(em, 'ul > li > em'));
+    assert(false === matches(em, 'ul ul em'));
+
+    assert(true === matches(li, 'ul li'));
+    assert(true === matches(li, 'ul > li'));
+    assert(true === matches(li, 'li'));
+    assert(false === matches(li, 'div > li'));
+
+    assert(true == matches(ul, 'ul'));
+    assert(false == matches(ul, 'div ul'));
+    assert(false == matches(ul, 'body > ul'));
+  })
+  it('should not throw an Error when given `null`', function(){
+    assert(false == matches(null, 'ul'));
+  })
+  it('should not throw an Error when given a TextNode', function(){
+    assert(false == matches(em.firstChild, 'ul'));
+  })
+})