// JS QuickTags version 1.2
//
// Copyright (c) 2002-2005 Alex King
// http://www.alexking.org/
//
// Licensed under the LGPL license
// http://www.gnu.org/copyleft/lesser.html
//
// **********************************************************************
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
// **********************************************************************
//
// This JavaScript will insert the tags below at the cursor position in IE and 
// Gecko-based browsers (Mozilla, Camino, Firefox, Netscape). For browsers that 
// do not support inserting at the cursor position (Safari, OmniWeb) it appends
// the tags to the end of the content.
//
// The variable 'svnwikiCanvas' must be defined as the <textarea> element you want 
// to be editing in. See the accompanying 'index.html' page for an example.
//
// Modifications for SVNWiki:
// neb at gigax dot org
// http://cgi.afc.no-ip.info/svnwiki.cgi/default/svnwiki
//

var edButtons = new Array();
var edLinks = 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_strong'
		,'Bold text'
		,'\'\'\''
		,'\'\'\''
		,'b'
	)
);

edButtons.push(
	new edButton(
		'ed_em'
		,'Italic text'
		,'\'\''
		,'\'\''
		,'i'
	)
);

edButtons.push(
	new edButton(
		'ed_link'
		,'Link'
		,''
		,''
		,'a'
		,-1
	)
); // special case

edButtons.push(
	new edButton(
		'ed_img'
		,'Image'
		,''
		,''
		,'m'
		,-1
	)
); // special case

edButtons.push(
	new edButton(
		'ed_def'
		,'Definition'
		,''
		,''
		,'d'
		,-1
	)
); // special case

edButtons.push(
	new edButton(
		'ed_title'
		,'Headline'
		,'\n\n== '
		,'\n\n'
		,'t'
	)
);

edButtons.push(
	new edButton(
		'ed_big'
		,'Big font'
		,'<big>'
		,'</big>'
		,'BB'
	)
);

edButtons.push(
	new edButton(
		'ed_small'
		,'Small font'
		,'<small>'
		,'</small>'
		,'bb'
	)
);

edButtons.push(
	new edButton(
		'ed_center'
		,'Center text'
		,'<center>'
		,'</center>'
		,'c'
	)
);

edButtons.push(
	new edButton(
		'ed_quote'
		,'Quote'
		,'<blockquote>'
		,'</blockquote>'
		,'q'
	)
);

edButtons.push(
	new edButton(
		'ed_hr'
		,'Horizontal line'
		,'\n\n----\n\n'
		,''
		,'h'
		,-1
	)
);

edButtons.push(
	new edButton(
		'ed_nowiki'
		,'No wiki syntax'
		,'<nowiki>'
		,'</nowiki>'
		,'w'
	)
);

var extendedStart = edButtons.length;

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" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertImage(svnwikiCanvas);" title="' + button.display + '" />');
			break;
		case 'ed_link':
			document.write('<input type="button" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertLink(svnwikiCanvas);" title="' + button.display + '" />');
			break;
		case 'ed_def':
			document.write('<input type="button" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertDefinition(svnwikiCanvas);" title="' + button.display + '" />');
			break;
		default:
			document.write('<input type="button" id="' + button.id + '" ' + accesskey + ' class="ed_button" onclick="edInsertTag(svnwikiCanvas, ' + i + ');" title="' + 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(svnwikiCanvas, edOpenTags[edOpenTags.length - 1]);
	}
}

function svnwikiToolbar() {
	document.write('<div id="ed_toolbar"><span>');
	for (i = 0; i < extendedStart; i++) {
		edShowButton(edButtons[i], i);
	}
	if (edShowExtraCookie()) {
		document.write(
			'<input type="button" id="ed_close" class="ed_button" onclick="edCloseAllTags();" title="Close syntax" />'
		);
		document.write(
			'<input type="button" id="ed_syntax" class="ed_button" onclick="edWikiSyntax();" title="Wiki syntax help" />'
		);
	}
	else {
		document.write(
			'<input type="button" id="ed_close" class="ed_button" onclick="edCloseAllTags();" title="Close syntax" />'
		);
		document.write(
			'<input type="button" id="ed_syntax" class="ed_button" onclick="edWikiSyntax();" title="Wiki syntax help" />'
		);
	}
	for (i = extendedStart; i < edButtons.length; i++) {
		edShowButton(edButtons[i], i);
	}
	document.write('</span>');
	document.write('</div>');
}

// insertion code

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) {
	var myValue = prompt('Enter the URL', 'http://');
	if (myValue) {
		myValue = '[[' 
				+ myValue 
				+ '|' + prompt('Enter a title', '') 
				+ ']]';
		edInsertContent(myField, myValue);
	}
}

function edInsertImage(myField) {
	var myValue = prompt('Enter the URL of the image', 'http://');
	if (myValue) {
		myValue = '[[image:' 
				+ myValue 
				+ '|' + prompt('Enter a description of the image', '') 
				+ ']]';
		edInsertContent(myField, myValue);
	}
}

function edInsertDefinition(myField) {
	var myValue = prompt('Enter a term', '');
	if (myValue) {
		myValue = '\n;' 
				+ myValue 
				+ ':' + prompt('Enter a definition for this term', '') 
				+ '\n\n';
		edInsertContent(myField, myValue);
	}
}

function edWikiSyntax() {
	window.open("wiki/syntax", "_blank");
}

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;
}