Merge remote-tracking branch 'ArthurHoaro/autocomplete' into next

1 files changed, 388 insertions, 0 deletions

diff --git a/inc/awesomplete.js b/inc/awesomplete.js
new file mode 100644
index 00000000..fae550e2
--- /dev/null
+++ b/inc/awesomplete.js
@@ -0,0 +1,388 @@
+/**
+ * Simple, lightweight, usable local autocomplete library for modern browsers
+ * Because there weren’t enough autocomplete scripts in the world? Because I’m completely insane and have NIH syndrome? Probably both. :P
+ * @author Lea Verou http://leaverou.github.io/awesomplete
+ * MIT license
+ */
+
+(function () {
+
+    var _ = function (input, o) {
+        var me = this;
+
+        // Setup
+
+        this.input = $(input);
+        this.input.setAttribute("aria-autocomplete", "list");
+
+        o = o || {};
+
+        configure.call(this, {
+            minChars: 2,
+            maxItems: 10,
+            autoFirst: false,
+            filter: _.FILTER_CONTAINS,
+            sort: _.SORT_BYLENGTH,
+            item: function (text, input) {
+                return $.create("li", {
+                    innerHTML: text.replace(RegExp($.regExpEscape(input.trim()), "gi"), "<mark>$&</mark>"),
+                    "aria-selected": "false"
+                });
+            },
+            replace: function (text) {
+                this.input.value = text;
+            }
+        }, o);
+
+        this.index = -1;
+
+        // Create necessary elements
+
+        this.container = $.create("div", {
+            className: "awesomplete",
+            around: input
+        });
+
+        this.ul = $.create("ul", {
+            hidden: "",
+            inside: this.container
+        });
+
+        this.status = $.create("span", {
+            className: "visually-hidden",
+            role: "status",
+            "aria-live": "assertive",
+            "aria-relevant": "additions",
+            inside: this.container
+        });
+
+        // Bind events
+
+        $.bind(this.input, {
+            "input": this.evaluate.bind(this),
+            "blur": this.close.bind(this),
+            "keydown": function(evt) {
+                var c = evt.keyCode;
+
+                // If the dropdown `ul` is in view, then act on keydown for the following keys:
+                // Enter / Esc / Up / Down
+                if(me.opened) {
+                    if (c === 13 && me.selected) { // Enter
+                        evt.preventDefault();
+                        me.select();
+                    }
+                    else if (c === 27) { // Esc
+                        me.close();
+                    }
+                    else if (c === 38 || c === 40) { // Down/Up arrow
+                        evt.preventDefault();
+                        me[c === 38? "previous" : "next"]();
+                    }
+                }
+            }
+        });
+
+        $.bind(this.input.form, {"submit": this.close.bind(this)});
+
+        $.bind(this.ul, {"mousedown": function(evt) {
+            var li = evt.target;
+
+            if (li !== this) {
+
+                while (li && !/li/i.test(li.nodeName)) {
+                    li = li.parentNode;
+                }
+
+                if (li) {
+                    me.select(li);
+                }
+            }
+        }});
+
+        if (this.input.hasAttribute("list")) {
+            this.list = "#" + input.getAttribute("list");
+            input.removeAttribute("list");
+        }
+        else {
+            this.list = this.input.getAttribute("data-list") || o.list || [];
+        }
+
+        _.all.push(this);
+    };
+
+    _.prototype = {
+        set list(list) {
+            if (Array.isArray(list)) {
+                this._list = list;
+            }
+            else if (typeof list === "string" && list.indexOf(",") > -1) {
+                this._list = list.split(/\s*,\s*/);
+            }
+            else { // Element or CSS selector
+                list = $(list);
+
+                if (list && list.children) {
+                    this._list = slice.apply(list.children).map(function (el) {
+                        return el.innerHTML.trim();
+                    });
+                }
+            }
+
+            if (document.activeElement === this.input) {
+                this.evaluate();
+            }
+        },
+
+        get selected() {
+            return this.index > -1;
+        },
+
+        get opened() {
+            return this.ul && this.ul.getAttribute("hidden") == null;
+        },
+
+        close: function () {
+            this.ul.setAttribute("hidden", "");
+            this.index = -1;
+
+            $.fire(this.input, "awesomplete-close");
+        },
+
+        open: function () {
+            this.ul.removeAttribute("hidden");
+
+            if (this.autoFirst && this.index === -1) {
+                this.goto(0);
+            }
+
+            $.fire(this.input, "awesomplete-open");
+        },
+
+        next: function () {
+            var count = this.ul.children.length;
+
+            this.goto(this.index < count - 1? this.index + 1 : -1);
+        },
+
+        previous: function () {
+            var count = this.ul.children.length;
+
+            this.goto(this.selected? this.index - 1 : count - 1);
+        },
+
+        // Should not be used, highlights specific item without any checks!
+        goto: function (i) {
+            var lis = this.ul.children;
+
+            if (this.selected) {
+                lis[this.index].setAttribute("aria-selected", "false");
+            }
+
+            this.index = i;
+
+            if (i > -1 && lis.length > 0) {
+                lis[i].setAttribute("aria-selected", "true");
+                this.status.textContent = lis[i].textContent;
+            }
+
+            $.fire(this.input, "awesomplete-highlight");
+        },
+
+        select: function (selected) {
+            selected = selected || this.ul.children[this.index];
+
+            if (selected) {
+                var prevented;
+
+                $.fire(this.input, "awesomplete-select", {
+                    text: selected.textContent,
+                    preventDefault: function () {
+                        prevented = true;
+                    }
+                });
+
+                if (!prevented) {
+                    this.replace(selected.textContent);
+                    this.close();
+                    $.fire(this.input, "awesomplete-selectcomplete");
+                }
+            }
+        },
+
+        evaluate: function() {
+            var me = this;
+            var value = this.input.value;
+
+            if (value.length >= this.minChars && this._list.length > 0) {
+                this.index = -1;
+                // Populate list with options that match
+                this.ul.innerHTML = "";
+
+                this._list
+                    .filter(function(item) {
+                        return me.filter(item, value);
+                    })
+                    .sort(this.sort)
+                    .every(function(text, i) {
+                        me.ul.appendChild(me.item(text, value));
+
+                        return i < me.maxItems - 1;
+                    });
+
+                if (this.ul.children.length === 0) {
+                    this.close();
+                } else {
+                    this.open();
+                }
+            }
+            else {
+                this.close();
+            }
+        }
+    };
+
+// Static methods/properties
+
+    _.all = [];
+
+    _.FILTER_CONTAINS = function (text, input) {
+        return RegExp($.regExpEscape(input.trim()), "i").test(text);
+    };
+
+    _.FILTER_STARTSWITH = function (text, input) {
+        return RegExp("^" + $.regExpEscape(input.trim()), "i").test(text);
+    };
+
+    _.SORT_BYLENGTH = function (a, b) {
+        if (a.length !== b.length) {
+            return a.length - b.length;
+        }
+
+        return a < b? -1 : 1;
+    };
+
+// Private functions
+
+    function configure(properties, o) {
+        for (var i in properties) {
+            var initial = properties[i],
+                attrValue = this.input.getAttribute("data-" + i.toLowerCase());
+
+            if (typeof initial === "number") {
+                this[i] = +attrValue;
+            }
+            else if (initial === false) { // Boolean options must be false by default anyway
+                this[i] = attrValue !== null;
+            }
+            else if (initial instanceof Function) {
+                this[i] = null;
+            }
+            else {
+                this[i] = attrValue;
+            }
+
+            this[i] = this[i] || o[i] || initial;
+        }
+    }
+
+// Helpers
+
+    var slice = Array.prototype.slice;
+
+    function $(expr, con) {
+        return typeof expr === "string"? (con || document).querySelector(expr) : expr || null;
+    }
+
+    function $$(expr, con) {
+        return slice.call((con || document).querySelectorAll(expr));
+    }
+
+    $.create = function(tag, o) {
+        var element = document.createElement(tag);
+
+        for (var i in o) {
+            var val = o[i];
+
+            if (i === "inside") {
+                $(val).appendChild(element);
+            }
+            else if (i === "around") {
+                var ref = $(val);
+                ref.parentNode.insertBefore(element, ref);
+                element.appendChild(ref);
+            }
+            else if (i in element) {
+                element[i] = val;
+            }
+            else {
+                element.setAttribute(i, val);
+            }
+        }
+
+        return element;
+    };
+
+    $.bind = function(element, o) {
+        if (element) {
+            for (var event in o) {
+                var callback = o[event];
+
+                event.split(/\s+/).forEach(function (event) {
+                    element.addEventListener(event, callback);
+                });
+            }
+        }
+    };
+
+    $.fire = function(target, type, properties) {
+        var evt = document.createEvent("HTMLEvents");
+
+        evt.initEvent(type, true, true );
+
+        for (var j in properties) {
+            evt[j] = properties[j];
+        }
+
+        target.dispatchEvent(evt);
+    };
+
+    $.regExpEscape = function (s) {
+        return s.replace(/[-\\^$*+?.()|[\]{}]/g, "\\$&");
+    }
+
+// Initialization
+
+    function init() {
+        $$("input.awesomplete").forEach(function (input) {
+            new Awesomplete(input);
+        });
+    }
+
+// Are we in a browser? Check for Document constructor
+    if (typeof Document !== 'undefined') {
+        // DOM already loaded?
+        if (document.readyState !== "loading") {
+            init();
+        }
+        else {
+            // Wait for it
+            document.addEventListener("DOMContentLoaded", init);
+        }
+    }
+
+    _.$ = $;
+    _.$$ = $$;
+
+// Make sure to export Awesomplete on self when in a browser
+    if (typeof self !== 'undefined') {
+        self.Awesomplete = _;
+    }
+
+// Expose Awesomplete as a CJS module
+    if (typeof exports === 'object') {
+        module.exports = _;
+    }
+
+    return _;
+
+}());