var editButtons = new Array();
var editLinks = new Array();
var editOpenTags = new Array();

function editButton(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;		// access key
	this.open = open;			// set to -1 if tag does not need to be closed
}

function zeroise(number, threshold) {
	// FIXME: or we could use an implementation of printf in js here
	var str = number.toString();
	if (number < 0) { str = str.substr(1, str.length) }
	while (str.length < threshold) { str = "0" + str }
	if (number < 0) { str = '-' + str }
	return str;
}

var now = new Date();
var datetime = now.getUTCFullYear() + '-' + 
zeroise(now.getUTCMonth() + 1, 2) + '-' +
zeroise(now.getUTCDate(), 2) + 'T' + 
zeroise(now.getUTCHours(), 2) + ':' + 
zeroise(now.getUTCMinutes(), 2) + ':' + 
zeroise(now.getUTCSeconds() ,2) +
'+00:00';

editButtons[editButtons.length] = 
new editButton('edit_strong'
,' [F] '
,'<strong>'
,'</strong>'
,'b'
);

editButtons[editButtons.length] = 
new editButton('edit_em'
,' [K] '
,'<em>'
,'</em>'
,'i'
);

editButtons[editButtons.length] = 
new editButton('edit_unter'
,' [U] '
,'<u>'
,'</u>'
,'i'
);


editButtons[editButtons.length] = 
new editButton('edit_link'
,' [Link] '
,''
,'</a>'
,'a'
); // special case


editButtons[editButtons.length] = 
new editButton('edit_ul'
,' [ul] '
,'<ul>\n'
,'</ul>\n\n'
,'u'
);

editButtons[editButtons.length] = 
new editButton('edit_li'
,' [li] '
,'\t<li>'
,'</li>\n'
,'l'
);



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

editLinks[editLinks.length] = new editLink('ComComet'
                                    ,'http://www.comcomet.de/'
                                    );

editLinks[editLinks.length] = new editLink('comcomet.de'
                                    ,'http://www.comcomet.de/'
                                    );

function editShowButton(button, i) {
	if (button.id == 'edit_img') {
		document.write('<input type="button" id="' + button.id + '" accesskey="' + button.access + '" class="edit_button" onclick="editInsertImage(editCanvas);" value="' + button.display + '" />');
	}
	else if (button.id == 'edit_link') {
		document.write('<input type="button" id="' + button.id + '" accesskey="' + button.access + '" class="edit_button" onclick="editInsertLink(editCanvas, ' + i + ');" value="' + button.display + '" />');
	}
	else {
		document.write('<input type="button" id="' + button.id + '" accesskey="' + button.access + '" class="edit_button" onclick="editInsertTag(editCanvas, ' + i + ');" value="' + button.display + '"  />');
	}
}

function editShowLinks() {
	var tempStr = '<select onchange="editQuickLink(this.options[this.selectedIndex].value, this);"><option value="-1" selected>(Quick Links)</option>';
	for (i = 0; i < editLinks.length; i++) {
		tempStr += '<option value="' + i + '">' + editLinks[i].display + '</option>';
	}
	tempStr += '</select>';
	document.write(tempStr);
}

function editAddTag(button) {
	if (editButtons[button].tagEnd != '') {
		editOpenTags[editOpenTags.length] = button;
		document.getElementById(editButtons[button].id).value = '/' + document.getElementById(editButtons[button].id).value;
	}
}

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

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


function editQuickLink(i, thisSelect) {
	if (i > -1) {
		var newWin = '';
		if (editLinks[i].newWin == 1) {
			newWin = ' rel="external"';
		}
		var tempStr = '<a href="' + editLinks[i].URL + '"' + newWin + '>' 
		            + editLinks[i].display
		            + '</a>';
		thisSelect.selectedIndex = 0;
		editInsertContent(editCanvas, tempStr);
	}
	else {
		thisSelect.selectedIndex = 0;
	}
}

function editSpell(myField) {
	var word = '';
	if (document.selection) {
		myField.focus();
	    var sel = document.selection.createRange();
		if (sel.text.length > 0) {
			word = sel.text;
		}
	}
	else if (myField.selectionStart || myField.selectionStart == '0') {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		if (startPos != endPos) {
			word = myField.value.substring(startPos, endPos);
		}
	}
	if (word == '') {
		word = prompt('Enter a word to look up:', '');
	}
	if (word !== null && /^\w[\w ]*$/.test(word)) {
		window.open('http://www.answers.com/' + escape(word));
	}
}

function Toolbar() {
	document.write('<div id="cc_toolbar">');
	for (i = 0; i < editButtons.length; i++) {
		editShowButton(editButtons[i], i);
	}
	document.write('</div>');
}

// insertion code

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

function editInsertContent(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 editInsertLink(myField, i, defaultValue) {
	if (!defaultValue) {
		defaultValue = 'http://';
	}
	if (!editCheckOpenTags(i)) {
		var URL = prompt('Geben Sie Ihre URL (Webseiten-Adresse) ein:' ,defaultValue);
		if (URL) {
			editButtons[i].tagStart = '<a href="' + URL + '" rel="external">';
			editInsertTag(myField, i);
		}
	}
	else {
		editInsertTag(myField, i);
	}
}

function editInsertImage(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', '') 
				+ '" />';
		editInsertContent(myField, myValue);
	}
}