Modernise autosuggest code #25
@ -13,164 +13,165 @@ provided that the following conditions are met:
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'use strict';
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function AutoSuggest(opt) {
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if (typeof opt.inputElement === "undefined" || typeof opt.listElement === "undefined" || typeof opt.baseUrl === "undefined" || typeof opt.appendCallback === "undefined") {
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return;
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class AutoSuggest {
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constructor(opt) {
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if (typeof opt.inputElement === "undefined" || typeof opt.listElement === "undefined" ||
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typeof opt.baseUrl === "undefined" || typeof opt.appendCallback === "undefined") {
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return;
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}
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this.input = document.getElementById(opt.inputElement);
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this.input.autocomplete = "off";
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this.list = document.getElementById(opt.listElement);
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this.appendCallback = opt.appendCallback;
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this.baseurl = opt.baseUrl;
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this.input.addEventListener('keydown', event => this.doSelection(event), false);
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this.input.addEventListener('keyup', event => this.onType(event), false);
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}
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this.input = document.getElementById(opt.inputElement);
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this.input.autocomplete = "off";
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this.list = document.getElementById(opt.listElement);
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this.appendCallback = opt.appendCallback;
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this.baseurl = opt.baseUrl;
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doSelection(event) {
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if (typeof this.container === "undefined" || this.container.children.length === 0) {
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return;
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}
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var self = this;
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this.input.addEventListener('keydown', function(event) {
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self.doSelection(event);
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}, false);
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this.input.addEventListener('keyup', function(event) {
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self.onType(this, event);
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}, false);
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switch (event.key) {
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case 'Enter':
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event.preventDefault();
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this.container.children[this.selectedIndex].click();
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break;
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case 'ArrowUp':
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case 'ArrowDown':
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event.preventDefault();
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this.findSelectedElement().className = '';
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this.selectedIndex += event.key === 'ArrowUp' ? -1 : 1;
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if (this.selectedIndex < 0) {
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this.selectedIndex = this.container.children.length - 1;
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} else if (this.selectedIndex === this.container.children.length) {
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this.selectedIndex = 0;
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}
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let new_el = this.findSelectedElement().className = 'selected';
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break;
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}
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};
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findSelectedElement() {
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return this.container.children[this.selectedIndex];
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};
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onType(event) {
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if (['Enter', 'ArrowDown', 'ArrowUp'].indexOf(event.key) !== -1) {
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return;
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}
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let tokens = event.target.value.split(/\s+/).filter(token => token.length >= 2);
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if (tokens.length === 0) {
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if (typeof this.container !== "undefined") {
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this.clearContainer();
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}
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return false;
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}
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let request_uri = this.baseurl + '/suggest/?type=tags&data=' + window.encodeURIComponent(tokens.join(" "));
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let request = new HttpRequest('get', request_uri, {}, this.onReceive, this);
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};
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onReceive(response, self) {
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self.openContainer();
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self.clearContainer();
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self.fillContainer(response);
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};
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openContainer() {
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if (this.container) {
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if (!this.container.parentNode) {
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this.input.parentNode.appendChild(this.container);
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}
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return this.container;
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}
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this.container = document.createElement('ul');
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this.container.className = 'autosuggest';
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this.input.parentNode.appendChild(this.container);
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return this.container;
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};
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clearContainer() {
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while (this.container.children.length > 0) {
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this.container.removeChild(this.container.children[0]);
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}
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};
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clearInput() {
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this.input.value = "";
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this.input.focus();
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};
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closeContainer() {
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this.container.parentNode.removeChild(this.container);
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};
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fillContainer(response) {
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this.selectedIndex = 0;
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let query = this.input.value.trim().replace(/[\-\[\]{}()*+?.,\\\/^\$|#]/g, ' ');
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let query_tokens = query.split(/ +/).sort((a,b) => a.length - b.length);
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response.items.forEach((item, i) => {
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let node = document.createElement('li');
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node.innerHTML = this.highlightMatches(query_tokens, item.label);
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node.jsondata = item;
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node.addEventListener('click', event => {
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this.appendCallback(event.target.jsondata);
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this.closeContainer();
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this.clearInput();
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});
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this.container.appendChild(node);
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if (this.container.children.length === 1) {
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node.className = 'selected';
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}
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});
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};
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highlightMatches(query_tokens, item) {
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let itemTokens = item.split(/ +/);
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let queryTokens = new RegExp('(' + query_tokens.join('\|') + ')', 'i');
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itemTokens.forEach((token, index) => {
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item = item.replace(token, token.replace(queryTokens, ($1, match) => '<strong>' + match + '</strong>'));
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});
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return item;
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};
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}
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AutoSuggest.prototype.doSelection = function(event) {
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if (typeof this.container === "undefined" || this.container.children.length === 0) {
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return;
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class TagAutoSuggest extends AutoSuggest {
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constructor(opt) {
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super(opt);
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this.type = "tags";
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}
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switch (event.keyCode) {
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case 13: // Enter
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event.preventDefault();
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this.container.children[this.selectedIndex].click();
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break;
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fillContainer(response) {
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if (response.items.length > 0) {
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super.fillContainer.call(this, response);
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} else {
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let node = document.createElement('li')
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node.innerHTML = "<em>Tag does not exist yet. Create it?</em>";
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case 38: // Arrow up
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case 40: // Arrow down
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event.preventDefault();
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this.findSelectedElement().className = '';
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this.selectedIndex += event.keyCode === 38 ? -1 : 1;
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if (this.selectedIndex < 0) {
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this.selectedIndex = this.container.children.length - 1;
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} else if (this.selectedIndex === this.container.children.length) {
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this.selectedIndex = 0;
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}
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var new_el = this.findSelectedElement().className = 'selected';
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break;
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}
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};
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node.addEventListener('click', event => {
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this.createNewTag(response => this.appendCallback(response));
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this.closeContainer();
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this.clearInput();
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});
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AutoSuggest.prototype.findSelectedElement = function() {
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return this.container.children[this.selectedIndex];
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};
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AutoSuggest.prototype.onType = function(input, event) {
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if (event.keyCode === 13 || event.keyCode === 38 || event.keyCode === 40) {
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return;
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}
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var tokens = input.value.split(/\s+/).filter(function(token) {
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return token.length >= 2;
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});
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if (tokens.length === 0) {
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if (typeof this.container !== "undefined") {
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this.clearContainer();
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}
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return false;
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}
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var request_uri = this.baseurl + '/suggest/?type=tags&data=' + window.encodeURIComponent(tokens.join(" "));
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var request = new HttpRequest('get', request_uri, {}, this.onReceive, this);
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};
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AutoSuggest.prototype.onReceive = function(response, self) {
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self.openContainer();
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self.clearContainer();
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self.fillContainer(response);
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};
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AutoSuggest.prototype.openContainer = function() {
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if (this.container) {
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if (!this.container.parentNode) {
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this.input.parentNode.appendChild(this.container);
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}
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return this.container;
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}
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this.container = document.createElement('ul');
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this.container.className = 'autosuggest';
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this.input.parentNode.appendChild(this.container);
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return this.container;
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};
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AutoSuggest.prototype.clearContainer = function() {
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while (this.container.children.length > 0) {
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this.container.removeChild(this.container.children[0]);
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}
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};
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AutoSuggest.prototype.clearInput = function() {
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this.input.value = "";
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this.input.focus();
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};
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AutoSuggest.prototype.closeContainer = function() {
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this.container.parentNode.removeChild(this.container);
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};
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AutoSuggest.prototype.fillContainer = function(response) {
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var self = this;
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this.selectedIndex = 0;
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response.items.forEach(function(item, i) {
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var node = document.createElement('li');
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var text = document.createTextNode(item.label);
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node.jsondata = item;
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node.addEventListener('click', function(event) {
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self.appendCallback(this.jsondata);
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self.closeContainer();
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self.clearInput();
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});
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node.appendChild(text);
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self.container.appendChild(node);
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if (self.container.children.length === 1) {
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this.container.appendChild(node);
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this.selectedIndex = 0;
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node.className = 'selected';
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}
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});
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};
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};
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function TagAutoSuggest(opt) {
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AutoSuggest.prototype.constructor.call(this, opt);
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this.type = "tags";
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}
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TagAutoSuggest.prototype = Object.create(AutoSuggest.prototype);
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TagAutoSuggest.prototype.constructor = TagAutoSuggest;
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TagAutoSuggest.prototype.fillContainer = function(response) {
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if (response.items.length > 0) {
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AutoSuggest.prototype.fillContainer.call(this, response);
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} else {
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var node = document.createElement('li')
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node.innerHTML = "<em>Tag does not exist yet. Create it?</em>";
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var self = this;
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node.addEventListener('click', function(event) {
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self.createNewTag(function(response) {
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self.appendCallback(response);
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});
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self.closeContainer();
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self.clearInput();
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});
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self.container.appendChild(node);
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this.selectedIndex = 0;
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node.className = 'selected';
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createNewTag(callback) {
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let request_uri = this.baseurl + '/suggest/?type=createtag';
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let request = new HttpRequest('post', request_uri, 'tag=' + encodeURIComponent(this.input.value), callback, this);
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}
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};
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TagAutoSuggest.prototype.createNewTag = function(callback) {
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var request_uri = this.baseurl + '/suggest/?type=createtag';
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var request = new HttpRequest('post', request_uri, 'tag=' + encodeURIComponent(this.input.value), callback, this);
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}
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