xmpp.chapril.org-conversejs/src/converse-autocomplete.js

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// Converse.js
// http://conversejs.org
//
// Copyright (c) 2013-2018, the Converse.js developers
// Licensed under the Mozilla Public License (MPLv2)
// This plugin started as a fork of Lea Verou's Awesomplete
// https://leaverou.github.io/awesomplete/
(function (root, factory) {
define(["converse-core"], factory);
}(this, function (converse) {
const { _, Backbone } = converse.env,
u = converse.env.utils;
converse.plugins.add("converse-autocomplete", {
initialize () {
const { _converse } = this;
_converse.FILTER_CONTAINS = function (text, input) {
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return RegExp(helpers.regExpEscape(input.trim()), "i").test(text);
};
_converse.FILTER_STARTSWITH = function (text, input) {
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return RegExp("^" + helpers.regExpEscape(input.trim()), "i").test(text);
};
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const SORT_BYLENGTH = function (a, b) {
if (a.length !== b.length) {
return a.length - b.length;
}
return a < b? -1 : 1;
};
const REPLACE = (text) => (this.input.value = text.value);
const ITEM = (text, input) => {
input = input.trim();
const element = document.createElement("li");
element.setAttribute("aria-selected", "false");
const regex = new RegExp("("+input+")", "ig");
const parts = input ? text.split(regex) : [text];
parts.forEach((txt) => {
if (input && txt.match(regex)) {
const match = document.createElement("mark");
match.textContent = txt;
element.appendChild(match);
} else {
element.appendChild(document.createTextNode(txt));
}
});
return element;
};
class AutoComplete {
constructor (el, o) {
this.is_opened = false;
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if (u.hasClass('.suggestion-box', el)) {
this.container = el;
} else {
this.container = el.querySelector('.suggestion-box');
}
this.input = this.container.querySelector('.suggestion-box__input');
this.input.setAttribute("autocomplete", "off");
this.input.setAttribute("aria-autocomplete", "list");
this.ul = this.container.querySelector('.suggestion-box__results');
this.status = this.container.querySelector('.suggestion-box__additions');
o = o || {};
_.assignIn(this, {
'match_current_word': false, // Match only the current word, otherwise all input is matched
'match_on_tab': false, // Whether matching should only start when tab's pressed
'min_chars': 2,
'max_items': 10,
'auto_evaluate': true,
'auto_first': false,
'data': _.identity,
'filter': _converse.FILTER_CONTAINS,
'sort': o.sort === false ? false : SORT_BYLENGTH,
'item': ITEM,
'replace': REPLACE
}, o);
this.index = -1;
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const input = {
"blur": this.close.bind(this, {'reason': "blur" }),
"keydown": () => this.onKeyDown()
}
if (this.auto_evaluate) {
input["input"] = this.evaluate.bind(this);
}
this.bindEvents(input)
if (this.input.hasAttribute("list")) {
this.list = "#" + this.input.getAttribute("list");
this.input.removeAttribute("list");
} else {
this.list = this.input.getAttribute("data-list") || o.list || [];
}
}
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onKeyDown (evt) {
const c = evt.keyCode;
// If the dropdown `ul` is in view, then act on keydown for the following keys:
// Enter / Esc / Up / Down
if (this.opened) {
if (c === _converse.keycodes.ENTER && this.selected) {
evt.preventDefault();
this.select();
} else if (c === _converse.keycodes.ESCAPE) {
this.close({ reason: "esc" });
} else if (c === _converse.keycodes.UP_ARROW || c === _converse.keycodes.DOWN_ARROW) {
evt.preventDefault();
this[c === _converse.keycodes.UP_ARROW ? "previous" : "next"]();
}
}
}
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bindEvents (input) {
// Bind events
this._events = {
'input': input,
'form': {
"submit": this.close.bind(this, { reason: "submit" })
},
'ul': {
"mousedown": (evt) => {
let li = evt.target;
if (li !== this) {
while (li && !(/li/i).test(li.nodeName)) {
li = li.parentNode;
}
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if (li && evt.button === 0) { // Only select on left click
evt.preventDefault();
this.select(li, evt.target);
}
}
}
}
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};
helpers.bind(this.input, this._events.input);
helpers.bind(this.input.form, this._events.form);
helpers.bind(this.ul, this._events.ul);
}
set list (list) {
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if (Array.isArray(list) || typeof list === "function") {
this._list = list;
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} else if (typeof list === "string" && _.includes(list, ",")) {
this._list = list.split(/\s*,\s*/);
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} else { // Element or CSS selector
list = helpers.getElement(list);
if (list && list.children) {
const items = [];
slice.apply(list.children).forEach(function (el) {
if (!el.disabled) {
const text = el.textContent.trim(),
value = el.value || text,
label = el.label || text;
if (value !== "") {
items.push({ label: label, value: value });
}
}
});
this._list = items;
}
}
if (document.activeElement === this.input) {
this.evaluate();
}
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}
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get selected () {
return this.index > -1;
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}
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get opened () {
return this.is_opened;
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}
close (o) {
if (!this.opened) {
return;
}
this.ul.setAttribute("hidden", "");
this.is_opened = false;
this.index = -1;
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helpers.fire(this.input, "suggestion-box-close", o || {});
}
open () {
this.ul.removeAttribute("hidden");
this.is_opened = true;
if (this.auto_first && this.index === -1) {
this.goto(0);
}
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helpers.fire(this.input, "suggestion-box-open");
}
destroy () {
//remove events from the input and its form
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helpers.unbind(this.input, this._events.input);
helpers.unbind(this.input.form, this._events.form);
//move the input out of the suggestion-box container and remove the container and its children
const parentNode = this.container.parentNode;
parentNode.insertBefore(this.input, this.container);
parentNode.removeChild(this.container);
//remove autocomplete and aria-autocomplete attributes
this.input.removeAttribute("autocomplete");
this.input.removeAttribute("aria-autocomplete");
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}
next () {
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const count = this.ul.children.length;
this.goto(this.index < count - 1 ? this.index + 1 : (count ? 0 : -1) );
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}
previous () {
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const count = this.ul.children.length,
pos = this.index - 1;
this.goto(this.selected && pos !== -1 ? pos : count - 1);
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}
// Should not be used, highlights specific item without any checks!
goto (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;
// scroll to highlighted element in case parent's height is fixed
this.ul.scrollTop = lis[i].offsetTop - this.ul.clientHeight + lis[i].clientHeight;
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helpers.fire(this.input, "suggestion-box-highlight", {
text: this.suggestions[this.index]
});
}
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}
select (selected, origin) {
if (selected) {
this.index = u.siblingIndex(selected);
} else {
selected = this.ul.children[this.index];
}
if (selected) {
const suggestion = this.suggestions[this.index],
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allowed = helpers.fire(this.input, "suggestion-box-select", {
'text': suggestion,
'origin': origin || selected
});
if (allowed) {
this.replace(suggestion);
this.close({'reason': 'select'});
this.auto_completing = false;
this.trigger("suggestion-box-selectcomplete", {'text': suggestion});
}
}
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}
keyPressed (ev) {
if (_.includes([
_converse.keycodes.SHIFT,
_converse.keycodes.META,
_converse.keycodes.META_RIGHT,
_converse.keycodes.ESCAPE,
_converse.keycodes.ALT]
, ev.keyCode)) {
return;
}
if (this.match_on_tab && ev.keyCode === _converse.keycodes.TAB) {
ev.preventDefault();
this.auto_completing = true;
}
if (this.auto_completing) {
this.evaluate();
}
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}
evaluate (ev) {
let value = this.input.value;
if (this.match_current_word) {
value = u.getCurrentWord(this.input);
}
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const list = typeof this._list === "function" ? this._list() : this._list;
if (value.length >= this.min_chars && list.length > 0) {
this.index = -1;
// Populate list with options that match
this.ul.innerHTML = "";
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this.suggestions = list
.map(item => new Suggestion(this.data(item, value)))
.filter(item => this.filter(item, value));
if (this.sort !== false) {
this.suggestions = this.suggestions.sort(this.sort);
}
this.suggestions = this.suggestions.slice(0, this.max_items);
this.suggestions.forEach((text) => this.ul.appendChild(this.item(text, value)));
if (this.ul.children.length === 0) {
this.close({'reason': 'nomatches'});
} else {
this.open();
}
} else {
this.close({'reason': 'nomatches'});
this.auto_completing = false;
}
}
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}
// Make it an event emitter
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_.extend(AutoComplete.prototype, Backbone.Events);
// Private functions
function Suggestion(data) {
const o = Array.isArray(data)
? { label: data[0], value: data[1] }
: typeof data === "object" && "label" in data && "value" in data ? data : { label: data, value: data };
this.label = o.label || o.value;
this.value = o.value;
}
Object.defineProperty(Suggestion.prototype = Object.create(String.prototype), "length", {
get: function() { return this.label.length; }
});
Suggestion.prototype.toString = Suggestion.prototype.valueOf = function () {
return "" + this.label;
};
// Helpers
var slice = Array.prototype.slice;
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const helpers = {
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getElement (expr, el) {
return typeof expr === "string"? (el || document).querySelector(expr) : expr || null;
},
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bind (element, o) {
if (element) {
for (var event in o) {
if (!Object.prototype.hasOwnProperty.call(o, event)) {
continue;
}
const callback = o[event];
event.split(/\s+/).forEach(event => element.addEventListener(event, callback));
}
}
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},
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unbind (element, o) {
if (element) {
for (var event in o) {
if (!Object.prototype.hasOwnProperty.call(o, event)) {
continue;
}
const callback = o[event];
event.split(/\s+/).forEach(event => element.removeEventListener(event, callback));
}
}
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},
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fire (target, type, properties) {
const evt = document.createEvent("HTMLEvents");
evt.initEvent(type, true, true );
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for (var j in properties) {
if (!Object.prototype.hasOwnProperty.call(properties, j)) {
continue;
}
evt[j] = properties[j];
}
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return target.dispatchEvent(evt);
},
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regExpEscape (s) {
return s.replace(/[-\\^$*+?.()|[\]{}]/g, "\\$&");
}
}
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_converse.AutoComplete = AutoComplete;
}
});
}));