//    Licensed Materials - Property of IBM
//
//    IBM Cognos Products: ps
//
//    (C) Copyright IBM Corp. 2005, 2014
//
//    US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
// Copyright (C) 2008 Cognos ULC, an IBM Company. All rights reserved.
// Cognos (R) is a trademark of Cognos ULC, (formerly Cognos Incorporated).

function obj(sName) {
	return document.getElementById(sName);
}

var g_oTabWindow = document.getElementById('tabWindow');
var g_oTabs = document.getElementById('tabs');
var g_oBody = document.getElementsByTagName('body')[0];
var g_sDirection = "";
var oInterval = null;
var g_bEndScroll = false;
var g_iIncrument = null;
var g_iDefualtIncrument = 5;
var g_scrollDisabled = false;
				
function tabControlMouseOver(obj) {
	if (obj.className != 'tabScrollButtonDisabled') {
		obj.className = 'tabScrollButtonOver';
	}
}
function tabControlMouseOut(obj) {
	if (obj.className != 'tabScrollButtonDisabled') {
		obj.className = 'tabScrollButton';
	}
}

function tabControlDisable() {
	obj('tabControlRight').src =  g_sImageRoot + "action_scroll_right_disabled.gif";
	obj('tabControlRightContainer').className = 'tabScrollButtonDisabled';
	obj('tabControlLeft').src =  g_sImageRoot + "action_scroll_left_disabled.gif";
	obj('tabControlLeftContainer').className = 'tabScrollButtonDisabled';				
	g_scrollDisabled = true;
}

function tabControlEnable() {
	obj('tabControlRight').src =  g_sImageRoot + "action_scroll_right.gif";
	obj('tabControlRightContainer').className = 'tabScrollButton';
	obj('tabControlLeft').src =  g_sImageRoot + "action_scroll_left.gif";
	obj('tabControlLeftContainer').className = 'tabScrollButton';	
	g_scrollDisabled = false;			
}

function tabControlDBLClick(sDirection, evt) {
	var e = (evt) ? evt : (event) ? event : null;
	if (g_scrollDisabled) {
		return;
	}
	window.clearInterval(oInterval);
	oInterval = "";	
	var inc = (e.shiftKey) ? (g_iDefualtIncrument * 2) : g_iDefualtIncrument;
	scrollTab(sDirection, inc, e.ctrlKey);			
}
			
function tabControlPress(sDirection, evt) {	
	var e = (evt) ? evt : (event) ? event : null;
	if (g_scrollDisabled || e === null) {
		return;
	}
	g_sDirection = sDirection;
	g_bEndScroll = e.ctrlKey;
	g_iIncrument = (e.shiftKey) ? (g_iDefualtIncrument * 2) : g_iDefualtIncrument;
	oInterval = window.setInterval("scrollTab(g_sDirection,g_iIncrument,g_bEndScroll);", 10);
	return true;			
}

function tabControlRelease() {
	window.clearInterval(oInterval);
	oInterval = "";
}

function scrollTab(sDirection, iIncrument, bEnd) {
	var iMaxScroll =  g_oTabs.clientWidth - g_oTabWindow.clientWidth;
	if (iMaxScroll < 0) {
		iMaxScroll = 0;
	}
	
	var iScrollIncrument = (iIncrument > 0) ? iIncrument : g_iDefualtIncrument;
	if (bEnd) {
		iScrollIncrument = iMaxScroll;
	}
	var iScrollWidth = 0;
	var iAvailableScroll;
	
	if (sDirection == 'right') {
		iAvailableScroll = iMaxScroll - g_oTabWindow.scrollLeft;
		if (iAvailableScroll <= iScrollIncrument) {
			iScrollWidth = iAvailableScroll;
		} else {
			iScrollWidth = iScrollIncrument;
		}
	} else {
		iAvailableScroll = g_oTabWindow.scrollLeft;
		if (iAvailableScroll <= iScrollIncrument) {
			iScrollWidth = iAvailableScroll;
		} else {
			iScrollWidth = iScrollIncrument;
		}
			
		iScrollWidth = -(iScrollWidth);					
	}
	g_oTabWindow.scrollLeft = g_oTabWindow.scrollLeft + iScrollWidth;			
}

function tabEvalScroll() {	
	var bodySize = g_oBody.offsetWidth -48;
	var style = "overflow:hidden;width:" + bodySize + "px";
	g_oTabWindow.setAttribute("style",style);
	
	var iMaxScroll =  g_oTabs.clientWidth - g_oTabWindow.clientWidth;
	
	if (iMaxScroll > 0) {
		tabControlEnable();
	} else {
		tabControlDisable();
	}
}

function tabControlInitialize() {
	g_oBody.setAttribute("onresize","tabEvalScroll()");

	var oSelectedTab = document.getElementById('selectedTab');
	tabEvalScroll();
	if (oSelectedTab) {
		// Scroll to the selected tab
		var iSTWidth = oSelectedTab.offsetWidth;
		var iSTLeft = oSelectedTab.offsetLeft;
		var iTWWidth = g_oTabWindow.offsetWidth;
		var iLeftScrollOffset = (iTWWidth - iSTWidth) / 2;
		var iScroll = iSTLeft - iLeftScrollOffset;
		
		if ((iSTWidth +  iSTLeft) > iTWWidth) {
			scrollTab('right', iScroll, false);						
		}
	}
}

function tabControlResize() {}