1 files changed, 81 insertions, 0 deletions
diff --git a/frontend/gamma/js/Zepto/selector.js b/frontend/gamma/js/Zepto/selector.js
new file mode 100644
index 0000000..c0b035a
--- a/dev/null
+++ b/frontend/gamma/js/Zepto/selector.js
@@ -0,0 +1,81 @@
+;(function($){
+  var zepto = $.zepto, oldQsa = zepto.qsa, oldMatches = zepto.matches
+
+  function visible(elem){
+    elem = $(elem)
+    return !!(elem.width() || elem.height()) && elem.css("display") !== "none"
+  }
+
+  // Implements a subset from:
+  // http://api.jquery.com/category/selectors/jquery-selector-extensions/
+  //
+  // Each filter function receives the current index, all nodes in the
+  // considered set, and a value if there were parentheses. The value
+  // of `this` is the node currently being considered. The function returns the
+  // resulting node(s), null, or undefined.
+  //
+  // Complex selectors are not supported:
+  //   li:has(label:contains("foo")) + li:has(label:contains("bar"))
+  //   ul.inner:first > li
+  var filters = $.expr[':'] = {
+    visible:  function(){ if (visible(this)) return this },
+    hidden:   function(){ if (!visible(this)) return this },
+    selected: function(){ if (this.selected) return this },
+    checked:  function(){ if (this.checked) return this },
+    parent:   function(){ return this.parentNode },
+    first:    function(idx){ if (idx === 0) return this },
+    last:     function(idx, nodes){ if (idx === nodes.length - 1) return this },
+    eq:       function(idx, _, value){ if (idx === value) return this },
+    contains: function(idx, _, text){ if ($(this).text().indexOf(text) > -1) return this },
+    has:      function(idx, _, sel){ if (zepto.qsa(this, sel).length) return this }
+  }
+
+  var filterRe = new RegExp('(.*):(\\w+)(?:\\(([^)]+)\\))?$\\s*'),
+      childRe  = /^\s*>/,
+      classTag = 'Zepto' + (+new Date())
+
+  function process(sel, fn) {
+    // quote the hash in `a[href^=#]` expression
+    sel = sel.replace(/=#\]/g, '="#"]')
+    var filter, arg, match = filterRe.exec(sel)
+    if (match && match[2] in filters) {
+      var filter = filters[match[2]], arg = match[3]
+      sel = match[1]
+      if (arg) {
+        var num = Number(arg)
+        if (isNaN(num)) arg = arg.replace(/^["']|["']$/g, '')
+        else arg = num
+      }
+    }
+    return fn(sel, filter, arg)
+  }
+
+  zepto.qsa = function(node, selector) {
+    return process(selector, function(sel, filter, arg){
+      try {
+        var taggedParent
+        if (!sel && filter) sel = '*'
+        else if (childRe.test(sel))
+          // support "> *" child queries by tagging the parent node with a
+          // unique class and prepending that classname onto the selector
+          taggedParent = $(node).addClass(classTag), sel = '.'+classTag+' '+sel
+
+        var nodes = oldQsa(node, sel)
+      } catch(e) {
+        console.error('error performing selector: %o', selector)
+        throw e
+      } finally {
+        if (taggedParent) taggedParent.removeClass(classTag)
+      }
+      return !filter ? nodes :
+        zepto.uniq($.map(nodes, function(n, i){ return filter.call(n, i, nodes, arg) }))
+    })
+  }
+
+  zepto.matches = function(node, selector){
+    return process(selector, function(sel, filter, arg){
+      return (!sel || oldMatches(node, sel)) &&
+        (!filter || filter.call(node, null, arg) === node)
+    })
+  }
+})(Zepto)