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assets/webapps/camera.gaiamobile.org/bower_components/attach/index.js

@@ -0,0 +1,101 @@
+;
+(function () {
+    'use strict';
+    var ns = '_attach';
+    var proto = Element.prototype;
+    var matches = proto.matchesSelector || proto.webkitMatchesSelector || proto.mozMatchesSelector || proto.msMatchesSelector || proto.oMatchesSelector;
+    function attach(root, type, selector, fn, ctx) {
+        if (arguments.length === 2) {
+            return attach.many.apply(null, arguments);
+        }
+        if (typeof selector === 'function') {
+            ctx = fn;
+            fn = selector;
+            selector = null;
+        }
+        selector = selector || 'null';
+        var store = getStore(root);
+        var master = store.master[type];
+        var delegates = store.delegates[type] = store.delegates[type] || {};
+        delegates[selector] = fn;
+        if (master) {
+            return;
+        }
+        master = store.master[type] = callback;
+        root.addEventListener(type, master);
+        function callback(e) {
+            var el = e.target;
+            var selector;
+            var matched;
+            var out;
+            var fn;
+            while (el) {
+                for (selector in delegates) {
+                    fn = delegates[selector];
+                    matched = el === root && selector === 'null' || matches.call(el, selector);
+                    if (matched) {
+                        out = fn.call(ctx || el, e, el);
+                        if (out === false) {
+                            return e.stopPropagation();
+                        }
+                    }
+                }
+                if (el == root)
+                    break;
+                el = el.parentNode;
+            }
+        }
+    }
+    attach.on = attach;
+    attach.off = function (root, type, selector) {
+        var store = getStore(root);
+        var master = store.master[type];
+        var delegates = store.delegates[type];
+        if (type && selector) {
+            delete delegates[selector];
+        } else if (type) {
+            delete store.delegates[type];
+        } else {
+            for (type in store.master) {
+                attach.off(root, type);
+            }
+        }
+        if (isEmpty(store.delegates[type])) {
+            root.removeEventListener(type, master);
+            delete store.master[type];
+        }
+    };
+    attach.many = function (root, config, ctx) {
+        var parts;
+        var key;
+        for (key in config) {
+            parts = key.split(' ');
+            attach.on(root, parts[0], parts[1], config[key], ctx);
+        }
+    };
+    function getStore(el) {
+        return el[ns] || createStore(el);
+    }
+    function createStore(el) {
+        el[ns] = {
+            master: {},
+            delegates: {}
+        };
+        return el[ns];
+    }
+    function isEmpty(ob) {
+        for (var key in ob) {
+            return false;
+        }
+        return true;
+    }
+    if (typeof exports === 'object') {
+        module.exports = attach;
+    } else if (typeof define === 'function' && define.amd) {
+        define([], function () {
+            return attach;
+        });
+    } else {
+        window.attach = attach;
+    }
+}());