var edButtons = new Array();
var edOpenTags = new Array();

function edButton(id, display, tagStart, tagEnd, access, 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;			// set to -1 if tag does not need to be closed
	this.open = open;			// set to -1 if tag does not need to be closed
}

edButtons.push(new edButton('ed_bold', 'BOLD', '<b>', '</b>', 'b'));
edButtons.push(new edButton('ed_italic', 'ITALIC', '<i>', '</i>', 'i'));
edButtons.push(new edButton('ed_link', 'ANCHOR', '', '</a>', 'a'));
edButtons.push(new edButton('ed_img', 'IMAGE', '', '', 'm', -1));
var extendedStart = edButtons.length;

function edLink(display, URL, newWin) {
	this.display = display;
	this.URL = URL;
	if (!newWin) {
		newWin = 0;
	}
	this.newWin = newWin;
}

function edShowButton(button, i) {
	if (button.access) {
		var accesskey = ' accesskey = "' + button.access + '"'
	}
	else {
		var accesskey = '';
	}
	switch (button.id) {
		case 'ed_img':
			document.write('<input type="button" class="ez_sm" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertImage(edCanvas);" value="' + button.display + '">');
			break;
		case 'ed_link':
			document.write('<input type="button" class="ez_sm" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertLink(edCanvas, ' + i + ');" value="' + button.display + '">');
			break;
		case 'ed_ext_link':
			document.write('<input type="button" class="ez_sm" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertExtLink(edCanvas, ' + i + ');" value="' + button.display + '">');
			break;
		case 'ed_footnote':
			document.write('<input type="button" class="ez_sm" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertFootnote(edCanvas);" value="' + button.display + '">');
			break;
		default:
			document.write('<input type="button" class="ez_sm" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertTag(edCanvas, ' + i + ');" value="' + button.display + '" >');
			break;
	}
}

function edAddTag(button) {
	if (edButtons[button].tagEnd != '') {
		edOpenTags[edOpenTags.length] = button;
		document.getElementById(edButtons[button].id).value = '/' + document.getElementById(edButtons[button].id).value;
	}
}

function edRemoveTag(button) {
	for (i = 0; i < edOpenTags.length; i++) {
		if (edOpenTags[i] == button) {
			edOpenTags.splice(i, 1);
			document.getElementById(edButtons[button].id).value = document.getElementById(edButtons[button].id).value.replace('/', '');
		}
	}
}

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

function edCloseAllTags() {
	var count = edOpenTags.length;
	for (o = 0; o < count; o++) {
		edInsertTag(edCanvas, edOpenTags[edOpenTags.length - 1]);
	}
}

function edToolbar() {
	document.write('<div id="ed_toolbar"><span>');
	for (i = 0; i < extendedStart; i++) {
		edShowButton(edButtons[i], i);
	}
	
	for (i = extendedStart; i < edButtons.length; i++) {
		edShowButton(edButtons[i], i);
	}
	document.write('</span>');
	document.write('</div>');
}

// insertion code

function edInsertSpan(myField, myStart, myEnd) {
	//IE support
	if (document.selection) {
		myField.focus();
	    sel = document.selection.createRange();
		if (sel.text.length > 0) {
			sel.text = myStart + sel.text + myEnd;
		}		
		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 = myField.scrollTop;
		if (startPos != endPos) {
			myField.value = myField.value.substring(0, startPos)
			              + myStart
			              + myField.value.substring(startPos, endPos) 
			              + myEnd
			              + myField.value.substring(endPos, myField.value.length);
			cursorPos += myStart.length + myEnd.length;
		}
		else {
			if (!edCheckOpenTags(i) || myEnd == '') {
				myField.value = myField.value.substring(0, startPos) 
				              + myStart
				              + myField.value.substring(endPos, myField.value.length);
				edAddTag(i);
				cursorPos = startPos + myStart.length;
			}
			else {
				myField.value = myField.value.substring(0, startPos) 
				              + myEnd
				              + myField.value.substring(endPos, myField.value.length);
				edRemoveTag(i);
				cursorPos = startPos + myEnd.length;
			}
		}
		myField.focus();
		myField.selectionStart = cursorPos;
		myField.selectionEnd = cursorPos;
		myField.scrollTop = scrollTop;
	}
	else {
		if (!edCheckOpenTags(i) || myEnd == '') {
			myField.value += myStart;
			edAddTag(i);
		}
		else {
			myField.value += myEnd;
			edRemoveTag(i);
		}
		myField.focus();
	}
}

function edInsertTag(myField, i) {
	//IE support
	if (document.selection) {
		myField.focus();
	    sel = document.selection.createRange();
		if (sel.text.length > 0) {
			sel.text = edButtons[i].tagStart + sel.text + edButtons[i].tagEnd;
		}
		else {
			if (!edCheckOpenTags(i) || edButtons[i].tagEnd == '') {
				sel.text = edButtons[i].tagStart;
				edAddTag(i);
			}
			else {
				sel.text = edButtons[i].tagEnd;
				edRemoveTag(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 = myField.scrollTop;
		if (startPos != endPos) {
			myField.value = myField.value.substring(0, startPos)
			              + edButtons[i].tagStart
			              + myField.value.substring(startPos, endPos) 
			              + edButtons[i].tagEnd
			              + myField.value.substring(endPos, myField.value.length);
			cursorPos += edButtons[i].tagStart.length + edButtons[i].tagEnd.length;
		}
		else {
			if (!edCheckOpenTags(i) || edButtons[i].tagEnd == '') {
				myField.value = myField.value.substring(0, startPos) 
				              + edButtons[i].tagStart
				              + myField.value.substring(endPos, myField.value.length);
				edAddTag(i);
				cursorPos = startPos + edButtons[i].tagStart.length;
			}
			else {
				myField.value = myField.value.substring(0, startPos) 
				              + edButtons[i].tagEnd
				              + myField.value.substring(endPos, myField.value.length);
				edRemoveTag(i);
				cursorPos = startPos + edButtons[i].tagEnd.length;
			}
		}
		myField.focus();
		myField.selectionStart = cursorPos;
		myField.selectionEnd = cursorPos;
		myField.scrollTop = scrollTop;
	}
	else {
		if (!edCheckOpenTags(i) || edButtons[i].tagEnd == '') {
			myField.value += edButtons[i].tagStart;
			edAddTag(i);
		}
		else {
			myField.value += edButtons[i].tagEnd;
			edRemoveTag(i);
		}
		myField.focus();
	}
}

function edInsertContent(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;
		var scrollTop = myField.scrollTop;
		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;
		myField.scrollTop = scrollTop;
	} else {
		myField.value += myValue;
		myField.focus();
	}
}

function edInsertLink(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://';
	}
	if (!edCheckOpenTags(i)) {
		var URL = prompt('Enter the URL' ,defaultValue);
		if (URL) {
			edButtons[i].tagStart = '<a href="' + URL + '">';
			edInsertTag(myField, i);
		}
	}
	else {
		edInsertTag(myField, i);
	}
}

function edInsertExtLink(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://';
	}
	if (!edCheckOpenTags(i)) {
		var URL = prompt('Enter the URL' ,defaultValue);
		if (URL) {
			edButtons[i].tagStart = '<a href="' + URL + '" rel="external">';
			edInsertTag(myField, i);
		}
	}
	else {
		edInsertTag(myField, i);
	}
}

function edInsertImage(myField) {
	var myValue = prompt('Enter the URL of the image', 'http://');
	if (myValue) {
		myValue = '<img src="' 
				+ myValue 
				+ '" alt="' + prompt('Enter a description of the image', '') 
				+ '">';
		edInsertContent(myField, myValue);
	}
}

function edInsertFootnote(myField) {
	var note = prompt('Enter the footnote:', '');
	if (!note || note == '') {
		return false;
	}
	var now = new Date;
	var fnId = 'fn' + now.getTime();
	var fnStart = edCanvas.value.indexOf('<ol class="footnotes">');
	if (fnStart != -1) {
		var fnStr1 = edCanvas.value.substring(0, fnStart)
		var fnStr2 = edCanvas.value.substring(fnStart, edCanvas.value.length)
		var count = countInstances(fnStr2, '<li id="') + 1;
	}
	else {
		var count = 1;
	}
	var count = '<sup><a href="#' + fnId + 'n" id="' + fnId + '" class="footnote">' + count + '</a></sup>';
	edInsertContent(edCanvas, count);
	if (fnStart != -1) {
		fnStr1 = edCanvas.value.substring(0, fnStart + count.length)
		fnStr2 = edCanvas.value.substring(fnStart + count.length, edCanvas.value.length)
	}
	else {
		var fnStr1 = edCanvas.value;
		var fnStr2 = "\n\n" + '<ol class="footnotes">' + "\n"
		           + '</ol>' + "\n";
	}
	var footnote = '	<li id="' + fnId + 'n">' + note + ' [<a href="#' + fnId + '">back</a>]</li>' + "\n"
				 + '</ol>';
	edCanvas.value = fnStr1 + fnStr2.replace('</ol>', footnote);
}

function countInstances(string, substr) {
	var count = string.split(substr);
	return count.length - 1;
}

function edSetCookie(name, value, expires, path, domain) {
	document.cookie= name + "=" + escape(value) +
		((expires) ? "; expires=" + expires.toGMTString() : "") +
		((path) ? "; path=" + path : "") +
		((domain) ? "; domain=" + domain : "");
}

function edShowExtraCookie() {
	var cookies = document.cookie.split(';');
	for (var i=0;i < cookies.length; i++) {
		var cookieData = cookies[i];
		while (cookieData.charAt(0) ==' ') {
			cookieData = cookieData.substring(1, cookieData.length);
		}
		if (cookieData.indexOf('js_quicktags_extra') == 0) {
			if (cookieData.substring(19, cookieData.length) == 'show') {
				return true;
			}
			else {
				return false;
			}
		}
	}
	return false;
}