/**
 * This is the javascript for creating a cargo rte in the project editor.
 * It may have originated from another plugin
 * @author Josh
 */

var feedButtons = new Array();
var feedLinks = new Array();
var feedOpenTags = new Array();
var feedCanvases = new Array();
var feedToolbars = new Array();


function feedButton(id, display, tagStart, tagEnd, access, tit, img, open) {
	this.id = id;							// used to name the toolbar button
	this.display = display;					// label on button
	this.tagStart = tagStart; 				// open tag
	this.tagEnd = tagEnd;					// close tag
	this.access = access;					// access key
	this.tit = tit;							// title
	this.img = img;							// image for button
	this.open = open;						// set to -1 if tag does not need to be closed
}


feedButtons[feedButtons.length] = new feedButton(
		'feed_strong'
		,' B '
		,'<b>','</b>'
		,'s'
		,'Bold'
		,'toolbar_bold.gif'
	);

feedButtons[feedButtons.length] = new feedButton(
		'feed_em'
		,' i '
		,'<i>','</i>'
		,'e'
		,'Italic'
		,'toolbar_italic.gif'
	);


feedButtons[feedButtons.length] = new feedButton(
		'feed_quote'
		,' quote '
		,'<blockquote>','</blockquote>'
		,'q'
		,'Quote'
		,'toolbar_quote.gif'
	);

feedButtons[feedButtons.length] = new feedButton(
		'feed_link'
		,' link '
		,'<a>','</a>'
		,'a'
		,'Insert link'
		,'toolbar_link.gif'
	); // special case


	
feedButtons[feedButtons.length] = new feedButton(
		'feed_fullscreen'
		,' fullscreen '
		,'{fullscreen}',''
		,'f'
		,'Insert fullscreen viewer button'
		,'toolbar_fullscreen.gif'
		,''
	); // special case

feedButtons[feedButtons.length] = new feedButton(
		'feed_slide'
		,' slideshow '
		,'{slideshow}','{/slideshow}'
		,'s'
		,'Make a slideshow'
		,'toolbar_slideshow.gif'
	); // special case

feedButtons[feedButtons.length] = new feedButton(
		'feed_audio'
		,' audio '
		,'{audio}',''
		,'d'
		,'Insert audio'
		,'toolbar_audio.gif'
		,''
	); // special case


feedButtons[feedButtons.length] = new feedButton(
		'feed_video'
		,' video '
		,'{video}',''
		,'v'
		,'Get or upload a video'
		,'toolbar_video.gif'
		,''
	); // special case


function feedLink() {
	this.display = '';
	this.URL = '';
	this.newWin = 0;
}

function feedShowButton(key, button, i) {
	var content;
	if (button.id == 'feed_link') {
		content = ('<a href="javascript:feedInsertLink(getCanvas(\''+key+'\'), ' + i + ');" onfocus="this.blur()" title="' + button.tit + '"/><img src="../_gfx/' + button.img + '" border="0"  /></a>');
	} else if (button.id == 'feed_fullscreen') {
		content = ('<img src="../_gfx/spacer.gif" width="5" /><a href="javascript:feedInsertContent(getCanvas(\''+key+'\'), \'' + feedButtons[i].tagStart + '\');" onfocus="this.blur()" title="' + button.tit + '"/><img src="../_gfx/' + button.img + '" border="0"  /></a>');
	} else if (button.id == 'feed_slide') {
		content = ('<img src="../_gfx/spacer.gif" width="5" /><a href="javascript:feedInsertTag(getCanvas(\''+key+'\'), ' + i + ');" onfocus="this.blur()" title="' + button.tit + '"/><img src="../_gfx/' + button.img + '" border="0"  /></a>');
	} else if (button.id == 'feed_video') {
		content = ('<a href="javascript:feedInsertVideo(getCanvas(\''+key+'\'), ' + i + ');" onfocus="this.blur()" title="' + button.tit + '"/><img src="../_gfx/' + button.img + '" border="0"  /></a>');				
	} else if(button.id == 'feed_audio') {
		content = ('<img src="../_gfx/spacer.gif" width="15" /><a href="javascript:feedInsertAudio(getCanvas(\''+key+'\'), ' + i + ');" onfocus="this.blur()" title="' + button.tit + '"/><img src="../_gfx/' + button.img + '" border="0"  /></a>');
	} else {
		content = ('<a href="javascript:feedInsertTag(getCanvas(\''+key+'\'), ' + i + ');" onfocus="this.blur()" title="' + button.tit + '"/><img src="../_gfx/' + button.img + '" border="0"  /></a>');
	}
	return content;
}


function feedAddTag(button) {
	if (feedButtons[button].tagEnd != '') {
		feedOpenTags[feedOpenTags.length] = button;
	}
}

function feedRemoveTag(button) {
	for (i = 0; i < feedOpenTags.length; i++) {
		if (feedOpenTags[i] == button) {
			feedOpenTags.splice(i, 1);
		}
	}
}

function feedCheckOpenTags(button) {
	var tag = 0;
	for (i = 0; i < feedOpenTags.length; i++) {
		if (feedOpenTags[i] == button) {
			tag++;
		}
	}
	if (tag > 0) {
		return true; // tag found
	}
	else {
		return false; // tag not found
	}
}

function feedCloseAllTags() {
	var count = feedOpenTags.length;
	for (o = 0; o < count; o++) {
		feedInsertTag(feedCanvas, feedOpenTags[feedOpenTags.length - 1]);
	}
}
/**
 * @depcrecated use constructor below
 */
function feedToolbar() {
	//console.log("feedToolbar");
	feedCanvases["default"] = document.getElementById('description');
	for (var i = 0; i < feedButtons.length; i++) {
		feedShowButton("default", feedButtons[i], i);
	}
}
function feedToolbarUnique(key, canvas, toolbar) {
	//console.log("feedToolbarUnique: " + key);
	feedCanvases[key] = canvas;
	feedToolbars[key] = toolbar;
	var contentstr = "";
	for (var i = 0; i < feedButtons.length; i++) {
		contentstr += feedShowButton(key, feedButtons[i], i);
	}
	toolbar.innerHTML = contentstr;
}

// insertion code
function feedInsertTag(myField, i)
{
	//IE support
	if (document.selection)
	{
		myField.focus();
			sel = document.selection.createRange();
		if (sel.text.length > 0) {
			sel.text = feedButtons[i].tagStart + sel.text + feedButtons[i].tagEnd;
		}
		else {
			sel.text = feedButtons[i].tagStart + feedButtons[i].tagEnd;
			feedAddTag(i);
		}
		myField.focus();
	}
	//MOZILLA/NETSCAPE support
	else if (myField.selectionStart || myField.selectionStart == '0')
	{
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		var cursorPos = endPos;

		var scrollTop, scrollLeft;
		if( myField.type == 'textarea' && typeof myField.scrollTop != 'undefined' )
		{ // remember old position
			scrollTop = myField.scrollTop;
			scrollLeft = myField.scrollLeft;
		}

		if (startPos != endPos)
		{ // some text selected
			myField.value = myField.value.substring(0, startPos)
										+ feedButtons[i].tagStart
										+ myField.value.substring(startPos, endPos)
										+ feedButtons[i].tagEnd
										+ myField.value.substring(endPos, myField.value.length);
			cursorPos += feedButtons[i].tagStart.length + feedButtons[i].tagEnd.length;
		}
		else {
			myField.value = myField.value.substring(0, startPos)
										+ feedButtons[i].tagStart + feedButtons[i].tagEnd
										+ myField.value.substring(endPos, myField.value.length);
			feedRemoveTag(i);
			cursorPos = startPos + feedButtons[i].tagStart.length;
		}

		if( typeof scrollTop != 'undefined' )
		{ // scroll to old position
			myField.scrollTop = scrollTop;
			myField.scrollLeft = scrollLeft;
		}

		myField.focus();
		myField.selectionStart = cursorPos;
		myField.selectionEnd = cursorPos;
	}
	else
	{ // Browser not especially supported
		myField.value += feedButtons[i].tagStart + feedButtons[i].tagEnd;
		feedRemoveTag(i);
		myField.focus();
	}
}

function feedInsertContent(myField, myValue) {
	//IE support
	if (document.selection) {
		myField.focus();
		sel = document.selection.createRange();
		sel.text = myValue;
		myField.focus();
	}
	//MOZILLA/NETSCAPE support
	else if (myField.selectionStart || myField.selectionStart == '0') {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		myField.value = myField.value.substring(0, startPos)
									+ myValue
									+ myField.value.substring(endPos, myField.value.length);
		myField.focus();
		myField.selectionStart = startPos + myValue.length;
		myField.selectionEnd = startPos + myValue.length;
	} else {
		myField.value += myValue;
		myField.focus();
	}
}

function feedInsertLink(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://';
	}
	if (!feedCheckOpenTags(i)) {
		var URL = prompt('URL:' ,defaultValue);
		if (URL) {
			feedButtons[i].tagStart = '<a href="' + URL + '" target="_blank">';
			feedInsertTag(myField, i);
		}
	}
	else {
		feedInsertTag(myField, i);
	}
}

function feedInsertAudio(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://example.com/example.mp3';
	}
	if (!feedCheckOpenTags(i)) {
		var URL = prompt('Enter URL to external MP3 file:' ,defaultValue);
		if (URL) {
			if(URL == defaultValue) URL = "";
			feedButtons[i].tagStart = '{audio=' + URL + '}';
			feedInsertTag(myField, i);
		}
	}
	else {
		feedInsertTag(myField, i);
	}
}

function feedInsertVideo(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://example.com/example.mov';
	}
	if (!feedCheckOpenTags(i)) {
		var URL = prompt('Enter URL to external Video file: (QT H.264 or FLV)' ,defaultValue);
		if (URL) { 
			if(isUrl(URL)) {
				if(URL == defaultValue) URL = "";
				feedButtons[i].tagStart = '{video=' + URL;
				feedButtons[i].tagStart += ' width=640 height=360';
				feedButtons[i].tagStart += ' poster=http://cargocollective.com/example/posterframe.jpg';
				feedButtons[i].tagStart += '}';
				feedInsertTag(myField, i);
			
			} else {
				feedButtons[i].tagStart = URL;
				feedInsertTag(myField, i);
			}
		}
	}
	else {
		feedInsertTag(myField, i);
	}
}		

function isUrl(s) {
	var regexp = /(http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/
	if(regexp.test(s) && s.indexOf("http://") < 2) return true;
	else return false;
}


//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////

function addCategory(myField,cat) {
	var lastChar = myField.value.charAt(myField.value.length-1);
	var secLastChar = myField.value.charAt(myField.value.length-2);
	//IE support
	if (document.selection) {
		myField.focus();
		if(myField.value == 'Separate with commas') myField.value = cat;
		else if(lastChar == ',') myField.value += ' ' + cat;
		else if(secLastChar == ',') myField.value += cat;
		else myField.value += ', ' + cat;
	}
	//MOZILLA/NETSCAPE support
	else if (myField.selectionStart || myField.selectionStart == '0') {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		if(myField.value == 'Separate with commas') myField.value = cat;
		else if(lastChar == ',') {
			myField.value = myField.value.substring(0, startPos)
									+ ' ' + cat
									+ myField.value.substring(endPos, myField.value.length);
		} else if(secLastChar == ',') {
			myField.value = myField.value.substring(0, startPos)
									+ ' ' + cat
									+ myField.value.substring(endPos, myField.value.length);
		} else {
			myField.value = myField.value.substring(0, startPos)
									+ ', ' + cat
									+ myField.value.substring(endPos, myField.value.length);
		}
		myField.focus();
		myField.selectionStart = startPos + myValue.length;
		myField.selectionEnd = startPos + myValue.length;
	} else {
		if(myField.value == 'Separate with commas') myField.value = cat;
		else if(lastChar == ',') myField.value += ' ' + cat;
		else if(secLastChar == ',') myField.value += cat;
		else myField.value += ', ' + cat;
	}
}


//////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////
/**
 * This function is used to add support for multiple text areas on the page
 */
function getCanvas(key) {
	//console.log("getCanvas:" + key);
	//console.log(feedCanvases);
	var c = feedCanvases[key];
	//console.log(c);
	if(c === undefined) {
		c = feedCanvases["default"] || undefined;
	}
	//console.log(c);
	return c;
}