485 lines
13 KiB
JavaScript
485 lines
13 KiB
JavaScript
/**
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* emojiarea - A rich textarea control that supports emojis, WYSIWYG-style.
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* Copyright (c) 2012 DIY Co
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this
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* file except in compliance with the License. You may obtain a copy of the License at:
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software distributed under
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* the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
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* ANY KIND, either express or implied. See the License for the specific language
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* governing permissions and limitations under the License.
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*
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* @author Brian Reavis <brian@diy.org>
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*/
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(function($, window, document) {
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var ELEMENT_NODE = 1;
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var TEXT_NODE = 3;
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var TAGS_BLOCK = ['p', 'div', 'pre', 'form'];
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var KEY_ESC = 27;
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var KEY_TAB = 9;
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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$.emojiarea = {
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path: '',
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icons: {},
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defaults: {
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button: null,
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buttonLabel: 'Emojis',
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buttonPosition: 'after'
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}
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};
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$.fn.emojiarea = function(options) {
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options = $.extend({}, $.emojiarea.defaults, options);
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return this.each(function() {
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var $textarea = $(this);
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if ('contentEditable' in document.body && options.wysiwyg !== false) {
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new EmojiArea_WYSIWYG($textarea, options);
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} else {
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new EmojiArea_Plain($textarea, options);
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}
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});
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};
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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var util = {};
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util.restoreSelection = (function() {
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if (window.getSelection) {
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return function(savedSelection) {
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var sel = window.getSelection();
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sel.removeAllRanges();
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for (var i = 0, len = savedSelection.length; i < len; ++i) {
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sel.addRange(savedSelection[i]);
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}
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};
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} else if (document.selection && document.selection.createRange) {
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return function(savedSelection) {
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if (savedSelection) {
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savedSelection.select();
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}
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};
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}
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})();
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util.saveSelection = (function() {
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if (window.getSelection) {
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return function() {
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var sel = window.getSelection(), ranges = [];
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if (sel.rangeCount) {
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for (var i = 0, len = sel.rangeCount; i < len; ++i) {
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ranges.push(sel.getRangeAt(i));
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}
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}
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return ranges;
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};
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} else if (document.selection && document.selection.createRange) {
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return function() {
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var sel = document.selection;
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return (sel.type.toLowerCase() !== 'none') ? sel.createRange() : null;
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};
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}
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})();
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util.replaceSelection = (function() {
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if (window.getSelection) {
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return function(content) {
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var range, sel = window.getSelection();
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var node = typeof content === 'string' ? document.createTextNode(content) : content;
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if (sel.getRangeAt && sel.rangeCount) {
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range = sel.getRangeAt(0);
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range.deleteContents();
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range.insertNode(document.createTextNode(' '));
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range.insertNode(node);
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range.setStart(node, 0);
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window.setTimeout(function() {
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range = document.createRange();
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range.setStartAfter(node);
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range.collapse(true);
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sel.removeAllRanges();
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sel.addRange(range);
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}, 0);
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}
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}
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} else if (document.selection && document.selection.createRange) {
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return function(content) {
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var range = document.selection.createRange();
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if (typeof content === 'string') {
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range.text = content;
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} else {
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range.pasteHTML(content.outerHTML);
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}
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}
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}
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})();
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util.insertAtCursor = function(text, el) {
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text = ' ' + text;
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var val = el.value, endIndex, startIndex, range;
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if (typeof el.selectionStart != 'undefined' && typeof el.selectionEnd != 'undefined') {
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startIndex = el.selectionStart;
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endIndex = el.selectionEnd;
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el.value = val.substring(0, startIndex) + text + val.substring(el.selectionEnd);
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el.selectionStart = el.selectionEnd = startIndex + text.length;
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} else if (typeof document.selection != 'undefined' && typeof document.selection.createRange != 'undefined') {
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el.focus();
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range = document.selection.createRange();
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range.text = text;
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range.select();
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}
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};
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util.extend = function(a, b) {
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if (typeof a === 'undefined' || !a) { a = {}; }
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if (typeof b === 'object') {
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for (var key in b) {
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if (b.hasOwnProperty(key)) {
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a[key] = b[key];
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}
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}
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}
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return a;
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};
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util.escapeRegex = function(str) {
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return (str + '').replace(/([.?*+^$[\]\\(){}|-])/g, '\\$1');
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};
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util.htmlEntities = function(str) {
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return String(str).replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"');
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};
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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var EmojiArea = function() {};
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EmojiArea.prototype.setup = function() {
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var self = this;
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this.$editor.on('focus', function() { self.hasFocus = true; });
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this.$editor.on('blur', function() { self.hasFocus = false; });
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this.setupButton();
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};
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EmojiArea.prototype.setupButton = function() {
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var self = this;
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var $button;
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if (this.options.button) {
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$button = $(this.options.button);
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} else if (this.options.button !== false) {
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$button = $('<a href="javascript:void(0)">');
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$button.html(this.options.buttonLabel);
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$button.addClass('emoji-button');
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$button.attr({title: this.options.buttonLabel});
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this.$editor[this.options.buttonPosition]($button);
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} else {
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$button = $('');
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}
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$button.on('click', function(e) {
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EmojiMenu.show(self);
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e.stopPropagation();
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});
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this.$button = $button;
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};
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EmojiArea.createIcon = function(group, emoji) {
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var filename = $.emojiarea.icons[group]['icons'][emoji];
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var path = $.emojiarea.path || '';
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if (path.length && path.charAt(path.length - 1) !== '/') {
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path += '/';
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}
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return '<img src="' + path + filename + '" alt="' + util.htmlEntities(emoji) + '">';
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};
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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/**
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* Editor (plain-text)
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*
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* @constructor
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* @param {object} $textarea
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* @param {object} options
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*/
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var EmojiArea_Plain = function($textarea, options) {
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this.options = options;
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this.$textarea = $textarea;
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this.$editor = $textarea;
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this.setup();
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};
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EmojiArea_Plain.prototype.insert = function(group, emoji) {
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if (!$.emojiarea.icons[group]['icons'].hasOwnProperty(emoji)) return;
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util.insertAtCursor(emoji, this.$textarea[0]);
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this.$textarea.trigger('change');
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};
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EmojiArea_Plain.prototype.val = function() {
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return this.$textarea.val();
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};
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util.extend(EmojiArea_Plain.prototype, EmojiArea.prototype);
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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/**
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* Editor (rich)
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*
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* @constructor
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* @param {object} $textarea
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* @param {object} options
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*/
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var EmojiArea_WYSIWYG = function($textarea, options) {
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var self = this;
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this.options = options;
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this.$textarea = $textarea;
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this.$editor = $('<div>').addClass('emoji-wysiwyg-editor');
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this.$editor.text($textarea.val());
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this.$editor.attr({contenteditable: 'true'});
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this.$editor.on('blur keyup paste', function() { return self.onChange.apply(self, arguments); });
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this.$editor.on('mousedown focus', function() { document.execCommand('enableObjectResizing', false, false); });
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this.$editor.on('blur', function() { document.execCommand('enableObjectResizing', true, true); });
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var html = this.$editor.text();
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var emojis = $.emojiarea.icons;
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for (var group in emojis) {
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for (var key in emojis[group]['icons']) {
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if (emojis[group]['icons'].hasOwnProperty(key)) {
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html = html.replace(new RegExp(util.escapeRegex(key), 'g'), EmojiArea.createIcon(group, key));
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}
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}
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}
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this.$editor.html(html);
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$textarea.hide().after(this.$editor);
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this.setup();
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this.$button.on('mousedown', function() {
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if (self.hasFocus) {
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self.selection = util.saveSelection();
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}
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});
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};
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EmojiArea_WYSIWYG.prototype.onChange = function() {
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this.$textarea.val(this.val()).trigger('change');
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};
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EmojiArea_WYSIWYG.prototype.insert = function(group, emoji) {
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var content;
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var $img = $(EmojiArea.createIcon(group, emoji));
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if ($img[0].attachEvent) {
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$img[0].attachEvent('onresizestart', function(e) { e.returnValue = false; }, false);
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}
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this.$editor.trigger('focus');
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if (this.selection) {
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util.restoreSelection(this.selection);
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}
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try { util.replaceSelection($img[0]); } catch (e) {}
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this.onChange();
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};
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EmojiArea_WYSIWYG.prototype.val = function() {
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var lines = [];
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var line = [];
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var flush = function() {
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lines.push(line.join(''));
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line = [];
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};
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var sanitizeNode = function(node) {
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if (node.nodeType === TEXT_NODE) {
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line.push(node.nodeValue);
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} else if (node.nodeType === ELEMENT_NODE) {
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var tagName = node.tagName.toLowerCase();
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var isBlock = TAGS_BLOCK.indexOf(tagName) !== -1;
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if (isBlock && line.length) flush();
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if (tagName === 'img') {
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var alt = node.getAttribute('alt') || '';
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if (alt) line.push(alt);
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return;
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} else if (tagName === 'br') {
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flush();
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}
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var children = node.childNodes;
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for (var i = 0; i < children.length; i++) {
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sanitizeNode(children[i]);
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}
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if (isBlock && line.length) flush();
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}
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};
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var children = this.$editor[0].childNodes;
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for (var i = 0; i < children.length; i++) {
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sanitizeNode(children[i]);
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}
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if (line.length) flush();
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return lines.join('\n');
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};
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util.extend(EmojiArea_WYSIWYG.prototype, EmojiArea.prototype);
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// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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/**
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* Emoji Dropdown Menu
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*
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* @constructor
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* @param {object} emojiarea
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*/
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var EmojiMenu = function() {
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var self = this;
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var $body = $(document.body);
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var $window = $(window);
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this.visible = false;
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this.emojiarea = null;
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this.$menu = $('<div>');
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this.$menu.addClass('emoji-menu');
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this.$menu.hide();
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this.$items = $('<div>').appendTo(this.$menu);
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$body.append(this.$menu);
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$body.on('keydown', function(e) {
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if (e.keyCode === KEY_ESC || e.keyCode === KEY_TAB) {
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self.hide();
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}
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});
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$body.on('mouseup', function() {
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self.hide();
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});
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$window.on('resize', function() {
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if (self.visible) self.reposition();
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});
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this.$menu.on('mouseup', 'a', function(e) {
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e.stopPropagation();
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return false;
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});
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this.$menu.on('click', 'a', function(e) {
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var emoji = $('.label', $(this)).text();
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var group = $('.label', $(this)).parent().parent().attr('group');
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if(group && emoji !== ''){
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window.setTimeout(function() {
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self.onItemSelected.apply(self, [group, emoji]);
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}, 0);
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e.stopPropagation();
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return false;
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}
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});
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this.load();
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};
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EmojiMenu.prototype.onItemSelected = function(group, emoji) {
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this.emojiarea.insert(group, emoji);
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this.hide();
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};
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EmojiMenu.prototype.load = function() {
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var html = [];
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var groups = [];
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var options = $.emojiarea.icons;
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var path = $.emojiarea.path;
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if (path.length && path.charAt(path.length - 1) !== '/') {
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path += '/';
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}
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groups.push('<ul class="group-selector">');
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for (var group in options) {
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groups.push('<a href="#group_' + group + '" class="tab_switch"><li>' + options[group]['name'] + '</li></a>');
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html.push('<div class="select_group" group="' + group + '" id="group_' + group + '">');
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for (var key in options[group]['icons']) {
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if (options[group]['icons'].hasOwnProperty(key)) {
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var filename = options[key];
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html.push('<a href="javascript:void(0)" title="' + util.htmlEntities(key) + '">' + EmojiArea.createIcon(group, key) + '<span class="label">' + util.htmlEntities(key) + '</span></a>');
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}
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}
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html.push('</div>');
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}
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groups.push('</ul>');
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this.$items.html(html.join(''));
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this.$menu.prepend(groups.join(''));
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this.$menu.find('.tab_switch').each(function(i) {
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if (i != 0) {
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var select = $(this).attr('href');
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$(select).hide();
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} else {
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$(this).addClass('active');
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}
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$(this).click(function() {
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$(this).addClass('active');
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$(this).siblings().removeClass('active');
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$('.select_group').hide();
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var select = $(this).attr('href');
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$(select).show();
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});
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});
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};
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EmojiMenu.prototype.reposition = function() {
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var $button = this.emojiarea.$button;
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var offset = $button.offset();
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offset.top += $button.outerHeight();
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offset.left += Math.round($button.outerWidth() / 2);
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this.$menu.css({
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top: offset.top,
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left: offset.left
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});
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};
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EmojiMenu.prototype.hide = function(callback) {
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if (this.emojiarea) {
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this.emojiarea.menu = null;
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this.emojiarea.$button.removeClass('on');
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this.emojiarea = null;
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}
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this.visible = false;
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this.$menu.hide();
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};
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EmojiMenu.prototype.show = function(emojiarea) {
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if (this.emojiarea && this.emojiarea === emojiarea) return;
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this.emojiarea = emojiarea;
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this.emojiarea.menu = this;
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this.reposition();
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this.$menu.show();
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this.visible = true;
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};
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EmojiMenu.show = (function() {
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var menu = null;
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return function(emojiarea) {
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menu = menu || new EmojiMenu();
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menu.show(emojiarea);
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};
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})();
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})(jQuery, window, document); |