/*
	Copyright (C) 2003-2007 UseBB Team
	http://www.usebb.net
	
	$Header: /cvsroot/usebb/UseBB/sources/javascript.js,v 1.18 2007/01/25 16:36:16 pc_freak Exp $
	
	This file is part of UseBB.
	
	UseBB is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.
	
	UseBB 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.	See the
	GNU General Public License for more details.
	
	You should have received a copy of the GNU General Public License
	along with UseBB; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/**
 * Some browser detection
 */
var clientPC = navigator.userAgent.toLowerCase();	// Get client info
var is_gecko = ((clientPC.indexOf('gecko') != -1) && (clientPC.indexOf('spoofer') == -1) && (clientPC.indexOf('khtml') == -1) && (clientPC.indexOf('netscape/7.0') == -1));
var is_safari = ((clientPC.indexOf('AppleWebKit') != -1) && (clientPC.indexOf('spoofer') == -1));
var is_khtml = (navigator.vendor == 'KDE' || (document.childNodes && !document.all && !navigator.taintEnabled));
var is_firefox = (clientPC.indexOf('firefox') != -1);

if (clientPC.indexOf('opera') != -1)
{
	var is_opera = true;
	var is_opera_preseven = (window.opera && !document.childNodes);
	var is_opera_seven = (window.opera && document.childNodes);
}

/**
 * apply tagOpen/tagClose to selection in textarea, use sampleText instead
 * of selection if there is none copied and adapted from phpBB
 *
 * @author phpBB development team
 * @author MediaWiki development team
 * @author Andreas Gohr <andi@splitbrain.org>
 * @author Jim Raynor <jim_raynor@web.de>
 */
function insert_tags(
	tagOpen,
	tagClose
)
{
	var txtarea = document.getElementById('tags-txtarea');
	var sampleText = '';

	if (tagOpen.substring(0, 5) == "[url=")
		sampleText = 'Link name';

	// IE
	if (document.selection && !is_gecko)
	{
		var theSelection = document.selection.createRange().text;
		var replaced = true;

		if (!theSelection)
		{
			replaced = false;
			theSelection = sampleText;
		}
		else if (tagOpen.substring(0, 5) == "[url=")
			tagOpen = '[url=' +theSelection +']';

		txtarea.focus();

		// This has change
		text = theSelection;
		if (theSelection.charAt(theSelection.length - 1) == " ")
		{		// exclude ending space char, if any
			theSelection = theSelection.substring(0, theSelection.length - 1);
			r = document.selection.createRange();
			r.text = tagOpen + theSelection + tagClose + " ";
		}
		else
		{
			r = document.selection.createRange();
			r.text = tagOpen + theSelection + tagClose;
		}
		if (!replaced)
		{
			r.moveStart('character', -text.length - tagClose.length);
			r.moveEnd('character', -tagClose.length);
		}
		r.select();
	}
	else if (txtarea.selectionStart || txtarea.selectionStart == '0')
	{
		// Mozilla
		var replaced = false;
		var startPos = txtarea.selectionStart;
		var endPos = txtarea.selectionEnd;

		if (endPos - startPos)
			replaced = true;

		var scrollTop = txtarea.scrollTop;
		var myText = (txtarea.value).substring(startPos, endPos);

		if (!myText)
			myText = sampleText;
		else if (tagOpen.substring(0, 5) == "[url=")
			tagOpen = '[url=' +myText +']';

		if (myText.charAt(myText.length - 1) == " ")
		{		// exclude ending space char, if any
			subst = tagOpen + myText.substring(0, (myText.length - 1)) + tagClose + " ";
		}
		else
		{
			subst = tagOpen + myText + tagClose;
		}
		txtarea.value = txtarea.value.substring(0, startPos) + subst + txtarea.value.substring(endPos, txtarea.value.length);
		txtarea.focus();

		//set new selection
		if (replaced)
		{
			var cPos = startPos + (tagOpen.length + myText.length + tagClose.length);
			txtarea.selectionStart = cPos;
			txtarea.selectionEnd = cPos;
		}
		else
		{
			txtarea.selectionStart = startPos + tagOpen.length;
			txtarea.selectionEnd = startPos + tagOpen.length + myText.length;
		}
		txtarea.scrollTop = scrollTop;
	}
	else
	{
		// All others
		var copy_alertText = alertText;
		var re1 = new RegExp("\\$1", "g");
		var re2 = new RegExp("\\$2", "g");
		copy_alertText = copy_alertText.replace(re1, sampleText);
		copy_alertText = copy_alertText.replace(re2, tagOpen + sampleText + tagClose);
		var text;

		if (sampleText)
		{
			text = prompt(copy_alertText);
		}
		else
		{
			text = "";
		}
		if (!text)
		{
			text = sampleText;
		}
		else if (tagOpen.substring(0, 5) == "[url=")
			tagOpen = '[url=' +text +']';

		text = tagOpen + text + tagClose;
		//append to the end
		txtarea.value += "\n" + text;

		// in Safari this causes scrolling
		if (!is_safari)
		{
			txtarea.focus();
		}

	}
	// reposition cursor if possible
	if (txtarea.createTextRange)
		txtarea.caretPos = document.selection.createRange().duplicate();
}

//
// Shortcut for smiley adding code
//
function insert_smiley(
	code
)
{

	insert_tags(' ' + code + ' ', '');

}

//
// Set focus to input field
//
function set_focus(
	field_id
)
{

	if (document.getElementById(field_id))
		document.getElementById(field_id).focus();
	else
	{
		var e = document.getElementsByName(field_id);

		e[e.length - 1].focus();
	}

}

//
// Insert database table name
//
function insert_table(
	name
)
{

	insert_tags(name, '');

}

//
// Toggle ACP general configuration panels
//
function acp_config_toggle(
	panel
)
{

	if (!document.getElementsByTagName)
		return;

	var panels = document.getElementsByTagName('div');

	for (var i = 0; i < panels.length; i++)
	{

		if (panels[i].className == 'adminconfigtablecell')
			panels[i].style.display = 'none';

	}

	if (panel != null)
		document.getElementById(panel).style.display = 'block';

}

//
// Standards compliant external windows
//
function init_external(
)
{

	if (!document.getElementsByTagName)
		return;

	var anchors = document.getElementsByTagName('a');

	for (var i = 0; i < anchors.length; i++)
	{

		var anchor = anchors[i];
		if (anchor.href && anchor.rel && (' ' + anchor.rel + ' ').indexOf(' external ') != -1)
			anchor.target = '_blank';

	}

}

//
// Avatars resize function
//
function resize_avatars(
	allowed_width,
	allowed_height
)
{

	if (!document.getElementsByTagName)
		return;

	var avatars = document.getElementsByTagName('img');

	for (var i = 0; i < avatars.length; i++)
	{

		if (avatars[i].className == 'usebb-avatar')
		{

			var avatar = avatars[i];

			if (allowed_width > 0 && avatar.width > allowed_width)
				avatar.width = allowed_width;

			if (allowed_height > 0 && avatar.height > allowed_height)
				avatar.height = allowed_height;

		}

	}

}