// MediaWiki JavaScript support functions
// Part needed to run EditformToolbar
// Edited by JIri Vackar

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 ));
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);
}

// add any onload functions in this hook (please don't hard-code any events in the xhtml source)

var doneOnloadHook;

if (!window.onloadFuncts)
	var onloadFuncts = [];

function addOnloadHook(hookFunct) {
	// Allows add-on scripts to add onload functions
	onloadFuncts[onloadFuncts.length] = hookFunct;
}

function runOnloadHook() {
	// don't run anything below this for non-dom browsers
	if (doneOnloadHook || !(document.getElementById && document.getElementsByTagName))
		return;

	histrowinit();
	unhidetzbutton();
	tabbedprefs();
	akeytt();
	scrollEditBox();
	setupCheckboxShiftClick();

	// Run any added-on functions
	for (var i = 0; i < onloadFuncts.length; i++)
		onloadFuncts[i]();

	doneOnloadHook = true;
}

function hookEvent(hookName, hookFunct) {
	if (window.addEventListener)
		addEventListener(hookName, hookFunct, false);
	else if (window.attachEvent)
		attachEvent("on" + hookName, hookFunct);
}

//note: all skins shoud call runOnloadHook() at the end of html output,
//      so the below should be redundant. It's there just in case.
hookEvent("load", runOnloadHook);


var mwEditButtons = [];
var mwCustomEditButtons = []; // eg to add in MediaWiki:Common.js

// this function generates the actual toolbar buttons with localized text
// we use it to avoid creating the toolbar where javascript is not enabled
function addButton(imageFile, speedTip, tagOpen, tagClose, sampleText) {
	// Don't generate buttons for browsers which don't fully
	// support it.
	mwEditButtons[mwEditButtons.length] =
		{"imageFile": imageFile,
		 "speedTip": speedTip,
		 "tagOpen": tagOpen,
		 "tagClose": tagClose,
		 "sampleText": sampleText};
}

// this function generates the actual toolbar buttons with localized text
// we use it to avoid creating the toolbar where javascript is not enabled
function mwInsertEditButton(parent, item) {
	var image = document.createElement("img");
	image.width = 23;
	image.height = 22;
	image.src = item.imageFile;
	image.border = 0;
	image.alt = item.speedTip;
	image.title = item.speedTip;
	image.style.cursor = "pointer";
	image.onclick = function() {
		insertTags(item.tagOpen, item.tagClose, item.sampleText);
		return false;
	}
	
	parent.appendChild(image);
	return true;
}

function mwSetupToolbar() {
	var toolbar = document.getElementById('toolbar');
	if (!toolbar) return false;

	var textbox = document.getElementById('wpTextbox1');
	if (!textbox) return false;
	
	// Don't generate buttons for browsers which don't fully
	// support it.
	if (!document.selection && textbox.selectionStart == null)
		return false;
	
	for (var i in mwEditButtons) {
		mwInsertEditButton(toolbar, mwEditButtons[i]);
	}
	for (var i in mwCustomEditButtons) {
		mwInsertEditButton(toolbar, mwCustomEditButtons[i]);
	}
	return true;
}


// apply tagOpen/tagClose to selection in textarea,
// use sampleText instead of selection if there is none
// copied and adapted from phpBB
function insertTags(tagOpen, tagClose, sampleText) {
	if (document.editform)
		var txtarea = document.editform.wpTextbox1;
	else {
		// some alternate form? take the first one we can find
		var areas = document.getElementsByTagName('textarea');
		var txtarea = areas[0];
	}

	// IE
	if (document.selection  && !is_gecko) {
		var theSelection = document.selection.createRange().text;
		if (!theSelection)
			theSelection=sampleText;
		txtarea.focus();
		if (theSelection.charAt(theSelection.length - 1) == " ") { // exclude ending space char, if any
			theSelection = theSelection.substring(0, theSelection.length - 1);
			document.selection.createRange().text = tagOpen + theSelection + tagClose + " ";
		} else {
			document.selection.createRange().text = tagOpen + theSelection + tagClose;
		}

	// Mozilla
	} else if(txtarea.selectionStart || txtarea.selectionStart == '0') {
		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;
		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;

	// All other browsers get no toolbar.
	// There was previously support for a crippled "help"
	// bar, but that caused more problems than it solved.
	}
	// reposition cursor if possible
	if (txtarea.createTextRange)
		txtarea.caretPos = document.selection.createRange().duplicate();
}

function scrollEditBox() {
	var editBoxEl = document.getElementById("wpTextbox1");
	var scrollTopEl = document.getElementById("wpScrolltop");
	var editFormEl = document.getElementById("editform");

	if (editBoxEl && scrollTopEl) {
		if (scrollTopEl.value) editBoxEl.scrollTop = scrollTopEl.value;
		editFormEl.onsubmit = function() {
			document.getElementById("wpScrolltop").value = document.getElementById("wpTextbox1").scrollTop;
		}
	}
}

hookEvent("load", scrollEditBox);


function allmessagesshow() {
	k = document.getElementById('allmessagesfilter');
	if (k) { k.style.display = ''; }

	allmessages_prev = '';
	allmessages_modified = false;
}

hookEvent("load", allmessagesshow);
hookEvent("load", mwSetupToolbar);