/**
* bbCode control by subBlue design [ www.subBlue.com ]
* Includes unixsafe colour palette selector by SHS`
*/

// Startup variables
var imageTag = false;
var theSelection = false;
var bbcodeEnabled = true;

// Check for Browser & Platform for PC & IE specific bits
// More details from: http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var clientVer = parseInt(navigator.appVersion, 10); // Get browser version

var is_ie = ((clientPC.indexOf('msie') !== -1) && (clientPC.indexOf('opera') === -1));
var is_win = ((clientPC.indexOf('win') !== -1) || (clientPC.indexOf('16bit') !== -1));
var baseHeight;

/**
* Fix a bug involving the TextRange object. From
* http://www.frostjedi.com/terra/scripts/demo/caretBug.html
*/
function initInsertions() {
var doc;

if (document.forms[form_name]) {
doc = document;
} else {
doc = opener.document;
}

var textarea = doc.forms[form_name].elements[text_name];

if (is_ie && typeof(baseHeight) !== 'number') {
textarea.focus();
baseHeight = doc.selection.createRange().duplicate().boundingHeight;

if (!document.forms[form_name]) {
document.body.focus();
}
}
}

/**
* bbstyle
*/
function bbstyle(bbnumber) {
if (bbnumber !== -1) {
bbfontstyle(bbtags[bbnumber], bbtags[bbnumber+1]);
} else {
insert_text('[*]');
document.forms[form_name].elements[text_name].focus();
}
}

/**
* Apply bbcodes
*/
function bbfontstyle(bbopen, bbclose) {
theSelection = false;

var textarea = document.forms[form_name].elements[text_name];

textarea.focus();

if ((clientVer >= 4) && is_ie && is_win) {
// Get text selection
theSelection = document.selection.createRange().text;

if (theSelection) {
// Add tags around selection
document.selection.createRange().text = bbopen + theSelection + bbclose;
textarea.focus();
theSelection = '';
return;
}
} else if (textarea.selectionEnd && (textarea.selectionEnd - textarea.selectionStart > 0)) {
mozWrap(textarea, bbopen, bbclose);
textarea.focus();
theSelection = '';
return;
}

//The new position for the cursor after adding the bbcode
var caret_pos = getCaretPosition(textarea).start;
var new_pos = caret_pos + bbopen.length;

// Open tag
insert_text(bbopen + bbclose);

// Center the cursor when we don't have a selection
// Gecko and proper browsers
if (!isNaN(textarea.selectionStart)) {
textarea.selectionStart = new_pos;
textarea.selectionEnd = new_pos;
}
// IE
else if (document.selection) {
var range = textarea.createTextRange();
range.move("character", new_pos);
range.select();
storeCaret(textarea);
}

textarea.focus();
}

/**
* Insert text at position
*/
function insert_text(text, spaces, popup) {
var textarea;

if (!popup) {
textarea = document.forms[form_name].elements[text_name];
} else {
textarea = opener.document.forms[form_name].elements[text_name];
}

if (spaces) {
text = ' ' + text + ' ';
}

// Since IE9, IE also has textarea.selectionStart, but it still needs to be treated the old way.
// Therefore we simply add a !is_ie here until IE fixes the text-selection completely.
if (!isNaN(textarea.selectionStart) && !is_ie) {
var sel_start = textarea.selectionStart;
var sel_end = textarea.selectionEnd;

mozWrap(textarea, text, '');
textarea.selectionStart = sel_start + text.length;
textarea.selectionEnd = sel_end + text.length;
} else if (textarea.createTextRange && textarea.caretPos) {
if (baseHeight !== textarea.caretPos.boundingHeight) {
textarea.focus();
storeCaret(textarea);
}

var caret_pos = textarea.caretPos;
caret_pos.text = caret_pos.text.charAt(caret_pos.text.length - 1) === ' ' ? caret_pos.text + text + ' ' : caret_pos.text + text;
} else {
textarea.value = textarea.value + text;
}

if (!popup) {
textarea.focus();
}
}

/**
* Add inline attachment at position
*/
function attachInline(index, filename) {
insert_text('[attachment=' + index + ']' + filename + '[/attachment]');
document.forms[form_name].elements[text_name].focus();
}

/**
* Add quote text to message
*/
function addquote(post_id, username, l_wrote, attributes) {
var message_name = 'message_' + post_id;
var theSelection = '';
var divarea = false;
var i;

if (l_wrote === undefined) {
// Backwards compatibility
l_wrote = 'wrote';
}
if (typeof attributes !== 'object') {
attributes = {};
}

if (document.all) {
divarea = document.all[message_name];
} else {
divarea = document.getElementById(message_name);
}

// Get text selection - not only the post content :(
// IE9 must use the document.selection method but has the *.getSelection so we just force no IE
if (window.getSelection && !is_ie && !window.opera) {
theSelection = window.getSelection().toString();
} else if (document.getSelection && !is_ie) {
theSelection = document.getSelection();
} else if (document.selection) {
theSelection = document.selection.createRange().text;
}

if (theSelection === '' || typeof theSelection === 'undefined' || theSelection === null) {
if (divarea.innerHTML) {
theSelection = divarea.innerHTML.replace(/<br>/ig, '\n');
theSelection = theSelection.replace(/<br\/>/ig, '\n');
theSelection = theSelection.replace(/&lt\;/ig, '<');
theSelection = theSelection.replace(/&gt\;/ig, '>');
theSelection = theSelection.replace(/&amp\;/ig, '&');
theSelection = theSelection.replace(/&nbsp\;/ig, ' ');
} else if (document.all) {
theSelection = divarea.innerText;
} else if (divarea.textContent) {
theSelection = divarea.textContent;
} else if (divarea.firstChild.nodeValue) {
theSelection = divarea.firstChild.nodeValue;
}
}

if (theSelection) {
if (bbcodeEnabled) {
attributes.author = username;
insert_text(generateQuote(theSelection, attributes));
} else {
insert_text(username + ' ' + l_wrote + ':' + '\n');
var lines = split_lines(theSelection);
for (i = 0; i < lines.length; i++) {
insert_text('> ' + lines[i] + '\n');
}
}
}
}

/**
* Create a quote block for given text
*
* Possible attributes:
*   - author:  author's name (usually a username)
*   - post_id: post_id of the post being quoted
*   - user_id: user_id of the user being quoted
*   - time:    timestamp of the original message
*
* @param  {!string} text       Quote's text
* @param  {!Object} attributes Quote's attributes
* @return {!string}            Quote block to be used in a new post/text
*/
function generateQuote(text, attributes) {
text = text.replace(/^\s+/, '').replace(/\s+$/, '');
var quote = '[quote';
if (attributes.author) {
// Add the author as the BBCode's default attribute
quote += '=' + formatAttributeValue(attributes.author);
delete attributes.author;
}
for (var name in attributes) {
if (attributes.hasOwnProperty(name)) {
var value = attributes[name];
quote += ' ' + name + '=' + formatAttributeValue(value.toString());
}
}
quote += ']';
var newline = ((quote + text + '[/quote]').length > 80 || text.indexOf('\n') > -1) ? '\n' : '';
quote += newline + text + newline + '[/quote]';

return quote;
}

/**
* Format given string to be used as an attribute value
*
* Will return the string as-is if it can be used in a BBCode without quotes. Otherwise,
* it will use either single- or double- quotes depending on whichever requires less escaping.
* Quotes and backslashes are escaped with backslashes where necessary
*
* @param  {!string} str Original string
* @return {!string}     Same string if possible, escaped string within quotes otherwise
*/
function formatAttributeValue(str) {
if (!/[ "'\\\]]/.test(str)) {
// Return as-is if it contains none of: space, ' " \ or ]
return str;
}
var singleQuoted = "'" + str.replace(/[\\']/g, '\\$&') + "'",
doubleQuoted = '"' + str.replace(/[\\"]/g, '\\$&') + '"';

return (singleQuoted.length < doubleQuoted.length) ? singleQuoted : doubleQuoted;
}

function split_lines(text) {
var lines = text.split('\n');
var splitLines = new Array();
var j = 0;
var i;

for(i = 0; i < lines.length; i++) {
if (lines[i].length <= 80) {
splitLines[j] = lines[i];
j++;
} else {
var line = lines[i];
var splitAt;
do {
splitAt = line.indexOf(' ', 80);

if (splitAt === -1) {
splitLines[j] = line;
j++;
} else {
splitLines[j] = line.substring(0, splitAt);
line = line.substring(splitAt);
j++;
}
}
while(splitAt !== -1);
}
}
return splitLines;
}

/**
* From http://www.massless.org/mozedit/
*/
function mozWrap(txtarea, open, close) {
var selLength = (typeof(txtarea.textLength) === 'undefined') ? txtarea.value.length : txtarea.textLength;
var selStart = txtarea.selectionStart;
var selEnd = txtarea.selectionEnd;
var scrollTop = txtarea.scrollTop;

var s1 = (txtarea.value).substring(0,selStart);
var s2 = (txtarea.value).substring(selStart, selEnd);
var s3 = (txtarea.value).substring(selEnd, selLength);

txtarea.value = s1 + open + s2 + close + s3;
txtarea.selectionStart = selStart + open.length;
txtarea.selectionEnd = selEnd + open.length;
txtarea.focus();
txtarea.scrollTop = scrollTop;

return;
}

/**
* Insert at Caret position. Code from
* http://www.faqts.com/knowledge_base/view.phtml/aid/1052/fid/130
*/
function storeCaret(textEl) {
if (textEl.createTextRange && document.selection) {
textEl.caretPos = document.selection.createRange().duplicate();
}
}

/**
* Caret Position object
*/
function caretPosition() {
var start = null;
var end = null;
}

/**
* Get the caret position in an textarea
*/
function getCaretPosition(txtarea) {
var caretPos = new caretPosition();

// simple Gecko/Opera way
if (txtarea.selectionStart || txtarea.selectionStart === 0) {
caretPos.start = txtarea.selectionStart;
caretPos.end = txtarea.selectionEnd;
}
// dirty and slow IE way
else if (document.selection) {
// get current selection
var range = document.selection.createRange();

// a new selection of the whole textarea
var range_all = document.body.createTextRange();
range_all.moveToElementText(txtarea);

// calculate selection start point by moving beginning of range_all to beginning of range
var sel_start;
for (sel_start = 0; range_all.compareEndPoints('StartToStart', range) < 0; sel_start++) {
range_all.moveStart('character', 1);
}

txtarea.sel_start = sel_start;

// we ignore the end value for IE, this is already dirty enough and we don't need it
caretPos.start = txtarea.sel_start;
caretPos.end = txtarea.sel_start;
}

return caretPos;
}

/**
* Allow to use tab character when typing code
* Keep indentation of last line of code when typing code
*/
(function($) {
$(document).ready(function() {
var doc, textarea;

// find textarea, make sure browser supports necessary functions
if (document.forms[form_name]) {
doc = document;
} else {
doc = opener.document;
}

if (!doc.forms[form_name]) {
return;
}

textarea = doc.forms[form_name].elements[text_name];

phpbb.applyCodeEditor(textarea);
if ($('#attach-panel').length) {
phpbb.showDragNDrop(textarea);
}

$('textarea').on('keydown', function (e) {
if (e.which === 13 && (e.metaKey || e.ctrlKey)) {
$(this).closest('form').find(':submit').click();
}
});
});
})(jQuery);