415 lines
15 KiB
JavaScript
415 lines
15 KiB
JavaScript
// Converse.js
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// https://conversejs.org
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//
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// Copyright (c) 2013-2019, the Converse.js developers
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// Licensed under the Mozilla Public License (MPLv2)
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// This plugin started as a fork of Lea Verou's Awesomplete
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// https://leaverou.github.io/awesomplete/
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import converse from "@converse/headless/converse-core";
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const { _, Backbone } = converse.env,
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u = converse.env.utils;
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converse.plugins.add("converse-autocomplete", {
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initialize () {
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const { _converse } = this;
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_converse.FILTER_CONTAINS = function (text, input) {
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return RegExp(helpers.regExpEscape(input.trim()), "i").test(text);
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};
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_converse.FILTER_STARTSWITH = function (text, input) {
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return RegExp("^" + helpers.regExpEscape(input.trim()), "i").test(text);
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};
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const SORT_BYLENGTH = function (a, b) {
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if (a.length !== b.length) {
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return a.length - b.length;
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}
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return a < b? -1 : 1;
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};
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const ITEM = (text, input) => {
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input = input.trim();
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const element = document.createElement("li");
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element.setAttribute("aria-selected", "false");
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const regex = new RegExp("("+input+")", "ig");
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const parts = input ? text.split(regex) : [text];
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parts.forEach((txt) => {
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if (input && txt.match(regex)) {
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const match = document.createElement("mark");
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match.textContent = txt;
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element.appendChild(match);
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} else {
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element.appendChild(document.createTextNode(txt));
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}
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});
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return element;
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};
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class AutoComplete {
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constructor (el, config={}) {
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this.is_opened = false;
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if (u.hasClass('.suggestion-box', el)) {
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this.container = el;
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} else {
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this.container = el.querySelector('.suggestion-box');
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}
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this.input = this.container.querySelector('.suggestion-box__input');
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this.input.setAttribute("autocomplete", "off");
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this.input.setAttribute("aria-autocomplete", "list");
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this.ul = this.container.querySelector('.suggestion-box__results');
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this.status = this.container.querySelector('.suggestion-box__additions');
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_.assignIn(this, {
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'match_current_word': false, // Match only the current word, otherwise all input is matched
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'match_on_tab': false, // Whether matching should only start when tab's pressed
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'trigger_on_at': false, // Whether @ should trigger autocomplete
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'min_chars': 2,
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'max_items': 10,
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'auto_evaluate': true,
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'auto_first': false,
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'data': _.identity,
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'filter': _converse.FILTER_CONTAINS,
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'sort': config.sort === false ? false : SORT_BYLENGTH,
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'item': ITEM
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}, config);
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this.index = -1;
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this.bindEvents()
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if (this.input.hasAttribute("list")) {
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this.list = "#" + this.input.getAttribute("list");
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this.input.removeAttribute("list");
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} else {
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this.list = this.input.getAttribute("data-list") || config.list || [];
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}
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}
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bindEvents () {
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// Bind events
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const input = {
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"blur": () => this.close({'reason': 'blur'})
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}
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if (this.auto_evaluate) {
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input["input"] = () => this.evaluate();
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}
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this._events = {
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'input': input,
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'form': {
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"submit": () => this.close({'reason': 'submit'})
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},
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'ul': {
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"mousedown": (ev) => this.onMouseDown(ev),
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"mouseover": (ev) => this.onMouseOver(ev)
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}
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};
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helpers.bind(this.input, this._events.input);
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helpers.bind(this.input.form, this._events.form);
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helpers.bind(this.ul, this._events.ul);
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}
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set list (list) {
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if (Array.isArray(list) || typeof list === "function") {
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this._list = list;
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} else if (typeof list === "string" && _.includes(list, ",")) {
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this._list = list.split(/\s*,\s*/);
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} else { // Element or CSS selector
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list = helpers.getElement(list);
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if (list && list.children) {
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const items = [];
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slice.apply(list.children).forEach(function (el) {
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if (!el.disabled) {
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const text = el.textContent.trim(),
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value = el.value || text,
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label = el.label || text;
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if (value !== "") {
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items.push({ label: label, value: value });
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}
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}
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});
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this._list = items;
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}
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}
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if (document.activeElement === this.input) {
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this.evaluate();
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}
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}
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get selected () {
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return this.index > -1;
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}
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get opened () {
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return this.is_opened;
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}
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close (o) {
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if (!this.opened) {
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return;
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}
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this.ul.setAttribute("hidden", "");
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this.is_opened = false;
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this.index = -1;
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this.trigger("suggestion-box-close", o || {});
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}
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insertValue (suggestion) {
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let value;
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if (this.match_current_word) {
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u.replaceCurrentWord(this.input, suggestion.value);
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} else {
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this.input.value = suggestion.value;
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}
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}
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open () {
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this.ul.removeAttribute("hidden");
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this.is_opened = true;
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if (this.auto_first && this.index === -1) {
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this.goto(0);
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}
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this.trigger("suggestion-box-open");
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}
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destroy () {
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//remove events from the input and its form
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helpers.unbind(this.input, this._events.input);
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helpers.unbind(this.input.form, this._events.form);
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//move the input out of the suggestion-box container and remove the container and its children
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const parentNode = this.container.parentNode;
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parentNode.insertBefore(this.input, this.container);
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parentNode.removeChild(this.container);
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//remove autocomplete and aria-autocomplete attributes
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this.input.removeAttribute("autocomplete");
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this.input.removeAttribute("aria-autocomplete");
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}
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next () {
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const count = this.ul.children.length;
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this.goto(this.index < count - 1 ? this.index + 1 : (count ? 0 : -1) );
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}
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previous () {
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const count = this.ul.children.length,
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pos = this.index - 1;
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this.goto(this.selected && pos !== -1 ? pos : count - 1);
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}
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goto (i) {
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// Should not be used directly, highlights specific item without any checks!
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const list = this.ul.children;
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if (this.selected) {
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list[this.index].setAttribute("aria-selected", "false");
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}
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this.index = i;
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if (i > -1 && list.length > 0) {
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list[i].setAttribute("aria-selected", "true");
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list[i].focus();
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this.status.textContent = list[i].textContent;
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// scroll to highlighted element in case parent's height is fixed
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this.ul.scrollTop = list[i].offsetTop - this.ul.clientHeight + list[i].clientHeight;
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this.trigger("suggestion-box-highlight", {'text': this.suggestions[this.index]});
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}
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}
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select (selected, origin) {
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if (selected) {
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this.index = u.siblingIndex(selected);
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} else {
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selected = this.ul.children[this.index];
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}
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if (selected) {
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const suggestion = this.suggestions[this.index];
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this.insertValue(suggestion);
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this.close({'reason': 'select'});
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this.auto_completing = false;
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this.trigger("suggestion-box-selectcomplete", {'text': suggestion});
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}
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}
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onMouseOver (ev) {
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const li = u.ancestor(ev.target, 'li');
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if (li) {
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this.goto(Array.prototype.slice.call(this.ul.children).indexOf(li))
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}
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}
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onMouseDown (ev) {
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if (ev.button !== 0) {
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return; // Only select on left click
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}
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const li = u.ancestor(ev.target, 'li');
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if (li) {
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ev.preventDefault();
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this.select(li, ev.target);
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}
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}
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keyPressed (ev) {
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if (this.opened) {
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if (_.includes([_converse.keycodes.ENTER, _converse.keycodes.TAB], ev.keyCode) && this.selected) {
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ev.preventDefault();
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ev.stopPropagation();
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this.select();
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return true;
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} else if (ev.keyCode === _converse.keycodes.ESCAPE) {
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this.close({'reason': 'esc'});
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return true;
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} else if (_.includes([_converse.keycodes.UP_ARROW, _converse.keycodes.DOWN_ARROW], ev.keyCode)) {
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ev.preventDefault();
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ev.stopPropagation();
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this[ev.keyCode === _converse.keycodes.UP_ARROW ? "previous" : "next"]();
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return true;
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}
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}
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if (_.includes([
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_converse.keycodes.SHIFT,
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_converse.keycodes.META,
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_converse.keycodes.META_RIGHT,
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_converse.keycodes.ESCAPE,
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_converse.keycodes.ALT]
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, ev.keyCode)) {
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return;
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}
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if (this.match_on_tab && ev.keyCode === _converse.keycodes.TAB) {
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ev.preventDefault();
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this.auto_completing = true;
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} else if (this.trigger_on_at && ev.keyCode === _converse.keycodes.AT) {
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this.auto_completing = true;
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}
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}
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evaluate (ev) {
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const arrow_pressed = (
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ev.keyCode === _converse.keycodes.UP_ARROW ||
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ev.keyCode === _converse.keycodes.DOWN_ARROW
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);
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if (!this.auto_completing || (this.selected && arrow_pressed)) {
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return;
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}
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const list = typeof this._list === "function" ? this._list() : this._list;
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if (list.length === 0) {
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return;
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}
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let value = this.match_current_word ? u.getCurrentWord(this.input) : this.input.value;
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let ignore_min_chars = false;
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if (this.trigger_on_at && value.startsWith('@')) {
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ignore_min_chars = true;
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value = value.slice('1');
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}
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if ((value.length >= this.min_chars) || ignore_min_chars) {
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this.index = -1;
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// Populate list with options that match
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this.ul.innerHTML = "";
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this.suggestions = list
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.map(item => new Suggestion(this.data(item, value)))
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.filter(item => this.filter(item, value));
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if (this.sort !== false) {
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this.suggestions = this.suggestions.sort(this.sort);
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}
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this.suggestions = this.suggestions.slice(0, this.max_items);
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this.suggestions.forEach((text) => this.ul.appendChild(this.item(text, value)));
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if (this.ul.children.length === 0) {
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this.close({'reason': 'nomatches'});
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} else {
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this.open();
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}
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} else {
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this.close({'reason': 'nomatches'});
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this.auto_completing = false;
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}
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}
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}
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// Make it an event emitter
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_.extend(AutoComplete.prototype, Backbone.Events);
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// Private functions
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function Suggestion(data) {
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const o = Array.isArray(data)
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? { label: data[0], value: data[1] }
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: typeof data === "object" && "label" in data && "value" in data ? data : { label: data, value: data };
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this.label = o.label || o.value;
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this.value = o.value;
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}
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Object.defineProperty(Suggestion.prototype = Object.create(String.prototype), "length", {
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get: function() { return this.label.length; }
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});
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Suggestion.prototype.toString = Suggestion.prototype.valueOf = function () {
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return "" + this.label;
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};
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// Helpers
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var slice = Array.prototype.slice;
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const helpers = {
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getElement (expr, el) {
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return typeof expr === "string"? (el || document).querySelector(expr) : expr || null;
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},
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bind (element, o) {
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if (element) {
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for (var event in o) {
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if (!Object.prototype.hasOwnProperty.call(o, event)) {
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continue;
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}
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const callback = o[event];
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event.split(/\s+/).forEach(event => element.addEventListener(event, callback));
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}
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}
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},
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unbind (element, o) {
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if (element) {
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for (var event in o) {
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if (!Object.prototype.hasOwnProperty.call(o, event)) {
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continue;
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}
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const callback = o[event];
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event.split(/\s+/).forEach(event => element.removeEventListener(event, callback));
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}
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}
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},
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regExpEscape (s) {
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return s.replace(/[-\\^$*+?.()|[\]{}]/g, "\\$&");
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}
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}
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_converse.AutoComplete = AutoComplete;
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}
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});
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