/*
* Quicktags
*
* This is the HTML editor in WordPress. It can be attached to any textarea and will
* append a toolbar above it. This script is self-contained (does not require external libraries).
*
* Run quicktags(settings) to initialize it, where settings is an object containing up to 3 properties:
* settings = {
* id : 'my_id', the HTML ID of the textarea, required
* buttons: '' Comma separated list of the names of the default buttons to show. Optional.
* Current list of default button names: 'strong,em,link,block,del,ins,img,ul,ol,li,code,more,close';
* }
*
* The settings can also be a string quicktags_id.
*
* quicktags_id string The ID of the textarea that will be the editor canvas
* buttons string Comma separated list of the default buttons names that will be shown in that instance.
*
* @output wp-includes/js/quicktags.js
*/

// New edit toolbar used with permission
// by Alex King
// http://www.alexking.org/

/* global adminpage, wpActiveEditor, quicktagsL10n, wpLink, prompt, edButtons */

window.edButtons = [];

/* jshint ignore:start */

/**
* Back-compat
*
* Define all former global functions so plugins that hack quicktags.js directly don't cause fatal errors.
*/
window.edAddTag = function(){};
window.edCheckOpenTags = function(){};
window.edCloseAllTags = function(){};
window.edInsertImage = function(){};
window.edInsertLink = function(){};
window.edInsertTag = function(){};
window.edLink = function(){};
window.edQuickLink = function(){};
window.edRemoveTag = function(){};
window.edShowButton = function(){};
window.edShowLinks = function(){};
window.edSpell = function(){};
window.edToolbar = function(){};

/* jshint ignore:end */

(function(){
// Private stuff is prefixed with an underscore.
var _domReady = function(func) {
var t, i, DOMContentLoaded, _tryReady;

if ( typeof jQuery !== 'undefined' ) {
jQuery( func );
} else {
t = _domReady;
t.funcs = [];

t.ready = function() {
if ( ! t.isReady ) {
t.isReady = true;
for ( i = 0; i < t.funcs.length; i++ ) {
t.funcs[i]();
}
}
};

if ( t.isReady ) {
func();
} else {
t.funcs.push(func);
}

if ( ! t.eventAttached ) {
if ( document.addEventListener ) {
DOMContentLoaded = function(){document.removeEventListener('DOMContentLoaded', DOMContentLoaded, false);t.ready();};
document.addEventListener('DOMContentLoaded', DOMContentLoaded, false);
window.addEventListener('load', t.ready, false);
} else if ( document.attachEvent ) {
DOMContentLoaded = function(){if (document.readyState === 'complete'){ document.detachEvent('onreadystatechange', DOMContentLoaded);t.ready();}};
document.attachEvent('onreadystatechange', DOMContentLoaded);
window.attachEvent('onload', t.ready);

_tryReady = function() {
try {
document.documentElement.doScroll('left');
} catch(e) {
setTimeout(_tryReady, 50);
return;
}

t.ready();
};
_tryReady();
}

t.eventAttached = true;
}
}
},

_datetime = (function() {
var now = new Date(), zeroise;

zeroise = function(number) {
var str = number.toString();

if ( str.length < 2 ) {
str = '0' + str;
}

return str;
};

return now.getUTCFullYear() + '-' +
zeroise( now.getUTCMonth() + 1 ) + '-' +
zeroise( now.getUTCDate() ) + 'T' +
zeroise( now.getUTCHours() ) + ':' +
zeroise( now.getUTCMinutes() ) + ':' +
zeroise( now.getUTCSeconds() ) +
'+00:00';
})();

var qt = window.QTags = function(settings) {
if ( typeof(settings) === 'string' ) {
settings = {id: settings};
} else if ( typeof(settings) !== 'object' ) {
return false;
}

var t = this,
id = settings.id,
canvas = document.getElementById(id),
name = 'qt_' + id,
tb, onclick, toolbar_id, wrap, setActiveEditor;

if ( !id || !canvas ) {
return false;
}

t.name = name;
t.id = id;
t.canvas = canvas;
t.settings = settings;

if ( id === 'content' && typeof(adminpage) === 'string' && ( adminpage === 'post-new-php' || adminpage === 'post-php' ) ) {
// Back compat hack :-(
window.edCanvas = canvas;
toolbar_id = 'ed_toolbar';
} else {
toolbar_id = name + '_toolbar';
}

tb = document.getElementById( toolbar_id );

if ( ! tb ) {
tb = document.createElement('div');
tb.id = toolbar_id;
tb.className = 'quicktags-toolbar';
}

canvas.parentNode.insertBefore(tb, canvas);
t.toolbar = tb;

// Listen for click events.
onclick = function(e) {
e = e || window.event;
var target = e.target || e.srcElement, visible = target.clientWidth || target.offsetWidth, i;

// Don't call the callback on pressing the accesskey when the button is not visible.
if ( !visible ) {
return;
}

// As long as it has the class ed_button, execute the callback.
if ( / ed_button /.test(' ' + target.className + ' ') ) {
// We have to reassign canvas here.
t.canvas = canvas = document.getElementById(id);
i = target.id.replace(name + '_', '');

if ( t.theButtons[i] ) {
t.theButtons[i].callback.call(t.theButtons[i], target, canvas, t);
}
}
};

setActiveEditor = function() {
window.wpActiveEditor = id;
};

wrap = document.getElementById( 'wp-' + id + '-wrap' );

if ( tb.addEventListener ) {
tb.addEventListener( 'click', onclick, false );

if ( wrap ) {
wrap.addEventListener( 'click', setActiveEditor, false );
}
} else if ( tb.attachEvent ) {
tb.attachEvent( 'onclick', onclick );

if ( wrap ) {
wrap.attachEvent( 'onclick', setActiveEditor );
}
}

t.getButton = function(id) {
return t.theButtons[id];
};

t.getButtonElement = function(id) {
return document.getElementById(name + '_' + id);
};

t.init = function() {
_domReady( function(){ qt._buttonsInit( id ); } );
};

t.remove = function() {
delete qt.instances[id];

if ( tb && tb.parentNode ) {
tb.parentNode.removeChild( tb );
}
};

qt.instances[id] = t;
t.init();
};

function _escape( text ) {
text = text || '';
text = text.replace( /&([^#])(?![a-z1-4]{1,8};)/gi, '&#038;$1' );
return text.replace( /</g, '&lt;' ).replace( />/g, '&gt;' ).replace( /"/g, '&quot;' ).replace( /'/g, '&#039;' );
}

qt.instances = {};

qt.getInstance = function(id) {
return qt.instances[id];
};

qt._buttonsInit = function( id ) {
var t = this;

function _init( instanceId ) {
var canvas, name, settings, theButtons, html, ed, id, i, use,
defaults = ',strong,em,link,block,del,ins,img,ul,ol,li,code,more,close,';

ed = t.instances[instanceId];
canvas = ed.canvas;
name = ed.name;
settings = ed.settings;
html = '';
theButtons = {};
use = '';

// Set buttons.
if ( settings.buttons ) {
use = ','+settings.buttons+',';
}

for ( i in edButtons ) {
if ( ! edButtons[i] ) {
continue;
}

id = edButtons[i].id;
if ( use && defaults.indexOf( ',' + id + ',' ) !== -1 && use.indexOf( ',' + id + ',' ) === -1 ) {
continue;
}

if ( ! edButtons[i].instance || edButtons[i].instance === instanceId ) {
theButtons[id] = edButtons[i];

if ( edButtons[i].html ) {
html += edButtons[i].html( name + '_' );
}
}
}

if ( use && use.indexOf(',dfw,') !== -1 ) {
theButtons.dfw = new qt.DFWButton();
html += theButtons.dfw.html( name + '_' );
}

if ( 'rtl' === document.getElementsByTagName( 'html' )[0].dir ) {
theButtons.textdirection = new qt.TextDirectionButton();
html += theButtons.textdirection.html( name + '_' );
}

ed.toolbar.innerHTML = html;
ed.theButtons = theButtons;

if ( typeof jQuery !== 'undefined' ) {
jQuery( document ).triggerHandler( 'quicktags-init', [ ed ] );
}
}

if ( id ) {
_init( id );
} else {
for ( id in t.instances ) {
_init( id );
}
}

t.buttonsInitDone = true;
};

/**
* Main API function for adding a button to Quicktags
*
* Adds qt.Button or qt.TagButton depending on the args. The first three args are always required.
* To be able to add button(s) to Quicktags, your script should be enqueued as dependent
* on "quicktags" and outputted in the footer. If you are echoing JS directly from PHP,
* use add_action( 'admin_print_footer_scripts', 'output_my_js', 100 ) or add_action( 'wp_footer', 'output_my_js', 100 )
*
* Minimum required to add a button that calls an external function:
* QTags.addButton( 'my_id', 'my button', my_callback );
* function my_callback() { alert('yeah!'); }
*
* Minimum required to add a button that inserts a tag:
* QTags.addButton( 'my_id', 'my button', '<span>', '</span>' );
* QTags.addButton( 'my_id2', 'my button', '<br />' );
*
* @param string id Required. Button HTML ID
* @param string display Required. Button's value="..."
* @param string|function arg1 Required. Either a starting tag to be inserted like "<span>" or a callback that is executed when the button is clicked.
* @param string arg2 Optional. Ending tag like "</span>"
* @param string access_key Deprecated Not used
* @param string title Optional. Button's title="..."
* @param int priority Optional. Number representing the desired position of the button in the toolbar. 1 - 9 = first, 11 - 19 = second, 21 - 29 = third, etc.
* @param string instance Optional. Limit the button to a specific instance of Quicktags, add to all instances if not present.
* @param attr object Optional. Used to pass additional attributes. Currently supports `ariaLabel` and `ariaLabelClose` (for "close tag" state)
* @return mixed null or the button object that is needed for back-compat.
*/
qt.addButton = function( id, display, arg1, arg2, access_key, title, priority, instance, attr ) {
var btn;

if ( !id || !display ) {
return;
}

priority = priority || 0;
arg2 = arg2 || '';
attr = attr || {};

if ( typeof(arg1) === 'function' ) {
btn = new qt.Button( id, display, access_key, title, instance, attr );
btn.callback = arg1;
} else if ( typeof(arg1) === 'string' ) {
btn = new qt.TagButton( id, display, arg1, arg2, access_key, title, instance, attr );
} else {
return;
}

if ( priority === -1 ) { // Back-compat.
return btn;
}

if ( priority > 0 ) {
while ( typeof(edButtons[priority]) !== 'undefined' ) {
priority++;
}

edButtons[priority] = btn;
} else {
edButtons[edButtons.length] = btn;
}

if ( this.buttonsInitDone ) {
this._buttonsInit(); // Add the button HTML to all instances toolbars if addButton() was called too late.
}
};

qt.insertContent = function(content) {
var sel, startPos, endPos, scrollTop, text, canvas = document.getElementById(wpActiveEditor), event;

if ( !canvas ) {
return false;
}

if ( document.selection ) { // IE.
canvas.focus();
sel = document.selection.createRange();
sel.text = content;
canvas.focus();
} else if ( canvas.selectionStart || canvas.selectionStart === 0 ) { // FF, WebKit, Opera.
text = canvas.value;
startPos = canvas.selectionStart;
endPos = canvas.selectionEnd;
scrollTop = canvas.scrollTop;

canvas.value = text.substring(0, startPos) + content + text.substring(endPos, text.length);

canvas.selectionStart = startPos + content.length;
canvas.selectionEnd = startPos + content.length;
canvas.scrollTop = scrollTop;
canvas.focus();
} else {
canvas.value += content;
canvas.focus();
}

if ( document.createEvent ) {
event = document.createEvent( 'HTMLEvents' );
event.initEvent( 'change', false, true );
canvas.dispatchEvent( event );
} else if ( canvas.fireEvent ) {
canvas.fireEvent( 'onchange' );
}

return true;
};

// A plain, dumb button.
qt.Button = function( id, display, access, title, instance, attr ) {
this.id = id;
this.display = display;
this.access = '';
this.title = title || '';
this.instance = instance || '';
this.attr = attr || {};
};
qt.Button.prototype.html = function(idPrefix) {
var active, on, wp,
title = this.title ? ' title="' + _escape( this.title ) + '"' : '',
ariaLabel = this.attr && this.attr.ariaLabel ? ' aria-label="' + _escape( this.attr.ariaLabel ) + '"' : '',
val = this.display ? ' value="' + _escape( this.display ) + '"' : '',
id = this.id ? ' id="' + _escape( idPrefix + this.id ) + '"' : '',
dfw = ( wp = window.wp ) && wp.editor && wp.editor.dfw;

if ( this.id === 'fullscreen' ) {
return '<button type="button"' + id + ' class="ed_button qt-dfw qt-fullscreen"' + title + ariaLabel + '></button>';
} else if ( this.id === 'dfw' ) {
active = dfw && dfw.isActive() ? '' : ' disabled="disabled"';
on = dfw && dfw.isOn() ? ' active' : '';

return '<button type="button"' + id + ' class="ed_button qt-dfw' + on + '"' + title + ariaLabel + active + '></button>';
}

return '<input type="button"' + id + ' class="ed_button button button-small"' + title + ariaLabel + val + ' />';
};
qt.Button.prototype.callback = function(){};

// A button that inserts HTML tag.
qt.TagButton = function( id, display, tagStart, tagEnd, access, title, instance, attr ) {
var t = this;
qt.Button.call( t, id, display, access, title, instance, attr );
t.tagStart = tagStart;
t.tagEnd = tagEnd;
};
qt.TagButton.prototype = new qt.Button();
qt.TagButton.prototype.openTag = function( element, ed ) {
if ( ! ed.openTags ) {
ed.openTags = [];
}

if ( this.tagEnd ) {
ed.openTags.push( this.id );
element.value = '/' + element.value;

if ( this.attr.ariaLabelClose ) {
element.setAttribute( 'aria-label', this.attr.ariaLabelClose );
}
}
};
qt.TagButton.prototype.closeTag = function( element, ed ) {
var i = this.isOpen(ed);

if ( i !== false ) {
ed.openTags.splice( i, 1 );
}

element.value = this.display;

if ( this.attr.ariaLabel ) {
element.setAttribute( 'aria-label', this.attr.ariaLabel );
}
};
// Whether a tag is open or not. Returns false if not open, or current open depth of the tag.
qt.TagButton.prototype.isOpen = function (ed) {
var t = this, i = 0, ret = false;
if ( ed.openTags ) {
while ( ret === false && i < ed.openTags.length ) {
ret = ed.openTags[i] === t.id ? i : false;
i ++;
}
} else {
ret = false;
}
return ret;
};
qt.TagButton.prototype.callback = function(element, canvas, ed) {
var t = this, startPos, endPos, cursorPos, scrollTop, v = canvas.value, l, r, i, sel, endTag = v ? t.tagEnd : '', event;

if ( document.selection ) { // IE.
canvas.focus();
sel = document.selection.createRange();
if ( sel.text.length > 0 ) {
if ( !t.tagEnd ) {
sel.text = sel.text + t.tagStart;
} else {
sel.text = t.tagStart + sel.text + endTag;
}
} else {
if ( !t.tagEnd ) {
sel.text = t.tagStart;
} else if ( t.isOpen(ed) === false ) {
sel.text = t.tagStart;
t.openTag(element, ed);
} else {
sel.text = endTag;
t.closeTag(element, ed);
}
}
canvas.focus();
} else if ( canvas.selectionStart || canvas.selectionStart === 0 ) { // FF, WebKit, Opera.
startPos = canvas.selectionStart;
endPos = canvas.selectionEnd;

if ( startPos < endPos && v.charAt( endPos - 1 ) === '\n' ) {
endPos -= 1;
}

cursorPos = endPos;
scrollTop = canvas.scrollTop;
l = v.substring(0, startPos); // Left of the selection.
r = v.substring(endPos, v.length); // Right of the selection.
i = v.substring(startPos, endPos); // Inside the selection.
if ( startPos !== endPos ) {
if ( !t.tagEnd ) {
canvas.value = l + i + t.tagStart + r; // Insert self-closing tags after the selection.
cursorPos += t.tagStart.length;
} else {
canvas.value = l + t.tagStart + i + endTag + r;
cursorPos += t.tagStart.length + endTag.length;
}
} else {
if ( !t.tagEnd ) {
canvas.value = l + t.tagStart + r;
cursorPos = startPos + t.tagStart.length;
} else if ( t.isOpen(ed) === false ) {
canvas.value = l + t.tagStart + r;
t.openTag(element, ed);
cursorPos = startPos + t.tagStart.length;
} else {
canvas.value = l + endTag + r;
cursorPos = startPos + endTag.length;
t.closeTag(element, ed);
}
}

canvas.selectionStart = cursorPos;
canvas.selectionEnd = cursorPos;
canvas.scrollTop = scrollTop;
canvas.focus();
} else { // Other browsers?
if ( !endTag ) {
canvas.value += t.tagStart;
} else if ( t.isOpen(ed) !== false ) {
canvas.value += t.tagStart;
t.openTag(element, ed);
} else {
canvas.value += endTag;
t.closeTag(element, ed);
}
canvas.focus();
}

if ( document.createEvent ) {
event = document.createEvent( 'HTMLEvents' );
event.initEvent( 'change', false, true );
canvas.dispatchEvent( event );
} else if ( canvas.fireEvent ) {
canvas.fireEvent( 'onchange' );
}
};

// Removed.
qt.SpellButton = function() {};

// The close tags button.
qt.CloseButton = function() {
qt.Button.call( this, 'close', quicktagsL10n.closeTags, '', quicktagsL10n.closeAllOpenTags );
};

qt.CloseButton.prototype = new qt.Button();

qt._close = function(e, c, ed) {
var button, element, tbo = ed.openTags;

if ( tbo ) {
while ( tbo.length > 0 ) {
button = ed.getButton(tbo[tbo.length - 1]);
element = document.getElementById(ed.name + '_' + button.id);

if ( e ) {
button.callback.call(button, element, c, ed);
} else {
button.closeTag(element, ed);
}
}
}
};

qt.CloseButton.prototype.callback = qt._close;

qt.closeAllTags = function( editor_id ) {
var ed = this.getInstance( editor_id );

if ( ed ) {
qt._close( '', ed.canvas, ed );
}
};

// The link button.
qt.LinkButton = function() {
var attr = {
ariaLabel: quicktagsL10n.link
};

qt.TagButton.call( this, 'link', 'link', '', '</a>', '', '', '', attr );
};
qt.LinkButton.prototype = new qt.TagButton();
qt.LinkButton.prototype.callback = function(e, c, ed, defaultValue) {
var URL, t = this;

if ( typeof wpLink !== 'undefined' ) {
wpLink.open( ed.id );
return;
}

if ( ! defaultValue ) {
defaultValue = 'http://';
}

if ( t.isOpen(ed) === false ) {
URL = prompt( quicktagsL10n.enterURL, defaultValue );
if ( URL ) {
t.tagStart = '<a href="' + URL + '">';
qt.TagButton.prototype.callback.call(t, e, c, ed);
}
} else {
qt.TagButton.prototype.callback.call(t, e, c, ed);
}
};

// The img button.
qt.ImgButton = function() {
var attr = {
ariaLabel: quicktagsL10n.image
};

qt.TagButton.call( this, 'img', 'img', '', '', '', '', '', attr );
};
qt.ImgButton.prototype = new qt.TagButton();
qt.ImgButton.prototype.callback = function(e, c, ed, defaultValue) {
if ( ! defaultValue ) {
defaultValue = 'http://';
}
var src = prompt(quicktagsL10n.enterImageURL, defaultValue), alt;
if ( src ) {
alt = prompt(quicktagsL10n.enterImageDescription, '');
this.tagStart = '<img src="' + src + '" alt="' + alt + '" />';
qt.TagButton.prototype.callback.call(this, e, c, ed);
}
};

qt.DFWButton = function() {
qt.Button.call( this, 'dfw', '', 'f', quicktagsL10n.dfw );
};
qt.DFWButton.prototype = new qt.Button();
qt.DFWButton.prototype.callback = function() {
var wp;

if ( ! ( wp = window.wp ) || ! wp.editor || ! wp.editor.dfw ) {
return;
}

window.wp.editor.dfw.toggle();
};

qt.TextDirectionButton = function() {
qt.Button.call( this, 'textdirection', quicktagsL10n.textdirection, '', quicktagsL10n.toggleTextdirection );
};
qt.TextDirectionButton.prototype = new qt.Button();
qt.TextDirectionButton.prototype.callback = function(e, c) {
var isRTL = ( 'rtl' === document.getElementsByTagName('html')[0].dir ),
currentDirection = c.style.direction;

if ( ! currentDirection ) {
currentDirection = ( isRTL ) ? 'rtl' : 'ltr';
}

c.style.direction = ( 'rtl' === currentDirection ) ? 'ltr' : 'rtl';
c.focus();
};

// Ensure backward compatibility.
edButtons[10] = new qt.TagButton( 'strong', 'b', '<strong>', '</strong>', '', '', '', { ariaLabel: quicktagsL10n.strong, ariaLabelClose: quicktagsL10n.strongClose } );
edButtons[20] = new qt.TagButton( 'em', 'i', '<em>', '</em>', '', '', '', { ariaLabel: quicktagsL10n.em, ariaLabelClose: quicktagsL10n.emClose } );
edButtons[30] = new qt.LinkButton(); // Special case.
edButtons[40] = new qt.TagButton( 'block', 'b-quote', '\n\n<blockquote>', '</blockquote>\n\n', '', '', '', { ariaLabel: quicktagsL10n.blockquote, ariaLabelClose: quicktagsL10n.blockquoteClose } );
edButtons[50] = new qt.TagButton( 'del', 'del', '<del datetime="' + _datetime + '">', '</del>', '', '', '', { ariaLabel: quicktagsL10n.del, ariaLabelClose: quicktagsL10n.delClose } );
edButtons[60] = new qt.TagButton( 'ins', 'ins', '<ins datetime="' + _datetime + '">', '</ins>', '', '', '', { ariaLabel: quicktagsL10n.ins, ariaLabelClose: quicktagsL10n.insClose } );
edButtons[70] = new qt.ImgButton(); // Special case.
edButtons[80] = new qt.TagButton( 'ul', 'ul', '<ul>\n', '</ul>\n\n', '', '', '', { ariaLabel: quicktagsL10n.ul, ariaLabelClose: quicktagsL10n.ulClose } );
edButtons[90] = new qt.TagButton( 'ol', 'ol', '<ol>\n', '</ol>\n\n', '', '', '', { ariaLabel: quicktagsL10n.ol, ariaLabelClose: quicktagsL10n.olClose } );
edButtons[100] = new qt.TagButton( 'li', 'li', '\t<li>', '</li>\n', '', '', '', { ariaLabel: quicktagsL10n.li, ariaLabelClose: quicktagsL10n.liClose } );
edButtons[110] = new qt.TagButton( 'code', 'code', '<code>', '</code>', '', '', '', { ariaLabel: quicktagsL10n.code, ariaLabelClose: quicktagsL10n.codeClose } );
edButtons[120] = new qt.TagButton( 'more', 'more', '<!--more-->\n\n', '', '', '', '', { ariaLabel: quicktagsL10n.more } );
edButtons[140] = new qt.CloseButton();

})();

/**
* Initialize new instance of the Quicktags editor
*/
window.quicktags = function(settings) {
return new window.QTags(settings);
};

/**
* Inserts content at the caret in the active editor (textarea)
*
* Added for back compatibility
* @see QTags.insertContent()
*/
window.edInsertContent = function(bah, txt) {
return window.QTags.insertContent(txt);
};

/**
* Adds a button to all instances of the editor
*
* Added for back compatibility, use QTags.addButton() as it gives more flexibility like type of button, button placement, etc.
* @see QTags.addButton()
*/
window.edButton = function(id, display, tagStart, tagEnd, access) {
return window.QTags.addButton( id, display, tagStart, tagEnd, access, '', -1 );
};