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