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widearea.js
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widearea.js
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/**
* WideArea v0.1.0
* https://github.com/usablica/widearea
* MIT licensed
*
* Copyright (C) 2013 usabli.ca - By Afshin Mehrabani (@afshinmeh)
*/
(function (root, factory) {
if (typeof exports === 'object') {
// CommonJS
factory(exports);
} else if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(['exports'], factory);
} else {
// Browser globals
factory(root);
}
} (this, function (exports) {
//Default config/variables
var VERSION = '0.1.0';
/**
* WideArea main class
*
* @class WideArea
*/
function WideArea(obj) {
this._targetElement = obj;
this._options = {
wideAreaAttr: 'data-widearea',
exitOnEsc: true,
defaultColorScheme: 'light',
closeIconLabel: 'Close WideArea',
changeThemeIconLabel: 'Toggle Color Scheme',
fullScreenIconLabel: 'WideArea Mode'
};
_enable.call(this);
}
/**
* Enable the WideArea
*
* @api private
* @method _enable
*/
function _enable() {
var self = this;
//select all textareas in the target element
var textAreaList = this._targetElement.querySelectorAll('textarea[' + this._options.wideAreaAttr + '=\'enable\']');
//then, change all textareas to widearea
for (var i = textAreaList.length - 1; i >= 0; i--) {
var currentTextArea = textAreaList[i];
//create widearea wrapper element
var wideAreaWrapper = document.createElement('div'),
wideAreaIcons = document.createElement('div')
fullscreenIcon = document.createElement('a');
wideAreaWrapper.className = 'widearea-wrapper';
wideAreaIcons.className = 'widearea-icons';
fullscreenIcon.className = 'widearea-icon fullscreen';
fullscreenIcon.title = this._options.fullScreenIconLabel;
//hack!
fullscreenIcon.href = 'javascript:void(0);';
//bind to click event
fullscreenIcon.onclick = function() {
_enableFullScreen.call(self, this);
};
//clone current textarea
wideAreaWrapper.appendChild(currentTextArea.cloneNode());
wideAreaIcons.appendChild(fullscreenIcon);
wideAreaWrapper.appendChild(wideAreaIcons);
//add the wrapper to element
currentTextArea.parentNode.replaceChild(wideAreaWrapper, currentTextArea);
};
}
/**
* FullScreen the textarea
*
* @api private
* @method _enableFullScreen
* @param {Object} link
*/
function _enableFullScreen(link) {
var self = this;
//I don't know whether is this correct or not, but I think it's not a bad way
var targetTextarea = link.parentNode.parentNode.querySelector("textarea");
//clone current textarea
var currentTextArea = targetTextarea.cloneNode();
//add proper css class names
currentTextArea.className = ('widearea-fullscreen ' + targetTextarea.className).trim();
targetTextarea.className = ('widearea-fullscreened ' + targetTextarea.className).trim();
var controlPanel = document.createElement('div');
controlPanel.className = 'widearea-controlPanel';
//create close icon
var closeIcon = document.createElement('a');
closeIcon.href = 'javascript:void(0);';
closeIcon.className = 'widearea-icon close';
closeIcon.title = this._options.closeIconLabel;
closeIcon.onclick = function(){
_disableFullScreen.call(self);
};
//create close icon
var changeThemeIcon = document.createElement('a');
changeThemeIcon.href = 'javascript:void(0);';
changeThemeIcon.className = 'widearea-icon changeTheme';
changeThemeIcon.title = this._options.changeThemeIconLabel;
changeThemeIcon.onclick = function() {
_toggleColorScheme.call(self);
};
controlPanel.appendChild(closeIcon);
controlPanel.appendChild(changeThemeIcon);
//create overlay layer
var overlayLayer = document.createElement('div');
overlayLayer.className = 'widearea-overlayLayer ' + this._options.defaultColorScheme;
//add controls to overlay layer
overlayLayer.appendChild(currentTextArea);
overlayLayer.appendChild(controlPanel);
//finally add it to the body
document.body.appendChild(overlayLayer);
//set the focus to textarea
currentTextArea.focus();
//set the value of small textarea to fullscreen one
currentTextArea.value = targetTextarea.value;
//bind to keydown event
this._onKeyDown = function(e) {
if (e.keyCode === 27 && self._options.exitOnEsc == true) {
//escape key pressed
_disableFullScreen.call(self);
}
};
if (window.addEventListener) {
window.addEventListener('keydown', self._onKeyDown, true);
} else if (document.attachEvent) { //IE
document.attachEvent('onkeydown', self._onKeyDown);
}
}
/**
* Change/Toggle color scheme of WideArea
*
* @api private
* @method _toggleColorScheme
*/
function _toggleColorScheme() {
var overlayLayer = document.querySelector(".widearea-overlayLayer");
if(/dark/gi.test(overlayLayer.className)) {
overlayLayer.className = overlayLayer.className.replace('dark', 'light');
} else {
overlayLayer.className = overlayLayer.className.replace('light', 'dark');
}
}
/**
* Close FullScreen
*
* @api private
* @method _disableFullScreen
*/
function _disableFullScreen() {
var smallTextArea = document.querySelector("textarea.widearea-fullscreened");
var overlayLayer = document.querySelector(".widearea-overlayLayer");
var fullscreenTextArea = overlayLayer.querySelector("textarea");
//change the focus
smallTextArea.focus();
//set fullscreen textarea to small one
smallTextArea.value = fullscreenTextArea.value;
//and then remove the overlay layer
overlayLayer.parentNode.removeChild(overlayLayer);
//clean listeners
if (window.removeEventListener) {
window.removeEventListener('keydown', this._onKeyDown, true);
} else if (document.detachEvent) { //IE
document.detachEvent('onkeydown', this._onKeyDown);
}
}
/**
* Overwrites obj1's values with obj2's and adds obj2's if non existent in obj1
*
* @param obj1
* @param obj2
* @returns obj3 a new object based on obj1 and obj2
*/
function _mergeOptions(obj1, obj2) {
var obj3 = {};
for (var attrname in obj1) { obj3[attrname] = obj1[attrname]; }
for (var attrname in obj2) { obj3[attrname] = obj2[attrname]; }
return obj3;
}
var wideArea = function (selector) {
if (typeof (selector) === 'string') {
//select the target element with query selector
var targetElement = document.querySelector(selector);
if (targetElement) {
return new WideArea(targetElement);
} else {
throw new Error('There is no element with given selector.');
}
} else {
return new WideArea(document.body);
}
};
/**
* Current WideArea version
*
* @property version
* @type String
*/
wideArea.version = VERSION;
//Prototype
wideArea.fn = WideArea.prototype = {
clone: function () {
return new WideArea(this);
},
setOption: function(option, value) {
this._options[option] = value;
return this;
},
setOptions: function(options) {
this._options = _mergeOptions(this._options, options);
return this;
},
};
exports.wideArea = wideArea;
return wideArea;
}));