/////////////////// Plug-in file for CalendarXP 9.0 /////////////////
// This file is totally configurable. You may remove all the comments in this file to minimize the download size.
/////////////////////////////////////////////////////////////////////

///////////// Calendar Onchange Handler ////////////////////////////
// It's triggered whenever the calendar gets changed to y(ear),m(onth),d(ay)
// d = 0 means the calendar is about to switch to the month of (y,m); 
// d > 0 means a specific date [y,m,d] is about to be selected.
// e is a reference to the triggering event object
// Return a true value will cancel the change action.
// NOTE: DO NOT define this handler unless you really need to use it.
////////////////////////////////////////////////////////////////////
function fOnChange(y,m,d,e) {
	fSync(y,m,d);
	return false;  // return true to cancel the change.
}


///////////// Calendar AfterSelected Handler ///////////////////////
// It's triggered whenever a date gets fully selected.
// The selected date is passed in as y(ear),m(onth),d(ay)
// e is a reference to the triggering event object
// NOTE: DO NOT define this handler unless you really need to use it.
////////////////////////////////////////////////////////////////////
// function fAfterSelected(y,m,d,e) {}


///////////// Calendar Cell OnDrag Handler ///////////////////////
// It triggered when you try to drag a calendar cell. (y,m,d) is the cell date. 
// aStat = 0 means a mousedown is detected (dragstart)
// aStat = 1 means a mouseover between dragstart and dragend is detected (dragover)
// aStat = 2 means a mouseup is detected (dragend)
// e is a reference to the triggering event object
// NOTE: DO NOT define this handler unless you really need to use it.
//       If you use fRepaint() here, fAfterSelected() will be ignored.
////////////////////////////////////////////////////////////////////
function fOnDrag(y,m,d,aStat,e) {
	if (aStat==0) {
		var bRangeClick=e?fCheckKeyPressed(1+2+4,e):false;	// use ctrl, shift or alt to select range end
		if (fIsSelected(y,m,d))
			fRemoveRange(y,m,d,bRangeClick||(e?e.button==2||e.which==3:false));
		else
			fAddRange(y,m,d,bRangeClick);
		fRepaint();
	} else if (aStat==1)
		if (!fIsSelected(y,m,d)) {
			fAddRange(y,m,d,true);
			fRepaint();
		}
	return true; // cancel setDate action, 'cause we use multi-select now.
}




////////////////// Calendar OnResize Handler ///////////////////////
// It's triggered after the calendar panel has finished drawing.
// NOTE: DO NOT define this handler unless you really need to use it.
////////////////////////////////////////////////////////////////////
// function fOnResize() {}


////////////////// Calendar fOnWeekClick Handler ///////////////////////
// It's triggered when the week number is clicked.
// NOTE: DO NOT define this handler unless you really need to use it.
////////////////////////////////////////////////////////////////////
// function fOnWeekClick(year, weekNo) {}

////////////////// Calendar fOnDoWClick Handler ///////////////////////
// It's triggered when the week head (day of week) is clicked.
// dow ranged from 0-6 while 0 denotes Sunday, 6 denotes Saturday.
// NOTE: DO NOT define this handler unless you really need to use it.
////////////////////////////////////////////////////////////////////
// function fOnDoWClick(year, month, dow) {}


////////////////// Calendar fIsSelected Callback ///////////////////////
// It's triggered for every date passed in as y(ear) m(onth) d(ay). And if 
// the return value is true, that date will be rendered using the giMarkSelected,
// gcFGSelected, gcBGSelected and guSelectedBGImg theme options.
// NOTE: If NOT defined here, the engine will create one that checks the gdSelect only.
////////////////////////////////////////////////////////////////////
function fIsSelected(y,m,d) {
	if (eval(gsPDS).length==0) return false;
	var dt=Date.UTC(y,m-1,d);
	for (var i=0; i<eval(gsPDS).length; i++)
		if (eval(gsPDS)[i][0]<=dt&&dt<=eval(gsPDS)[i][1])
			return true;
	return false;
}



////////////////// Calendar fOnload Handler ///////////////////////
// It's triggered when the calendar engine is fully loaded by the browser.
// NOTE: DO NOT define this handler unless you really need to use it.
////////////////////////////////////////////////////////////////////
// function fOnload() {}


// ====== predefined utility functions for use with agendas. ========
// load an url in the window/frame designated by "framename".
function popup(url,framename) {	
	var w=parent.open(url,framename,"top=200,left=200,width=400,height=200,scrollbars=1,resizable=1");
	if (w&&url.split(":")[0]=="mailto") w.close();
	else if (w&&!framename) w.focus();
}

// ====== Following are self-defined and/or custom-built functions! =======
gbShareAgenda=true;		// enable agenda sharing.
gsCalTitle="gMonths[gCurMonth[1]-1]";	// reset title to use full month name
giDCStyle=2;	// hide month navigators
gbShrink2fit=false;

// indicates how many calendars need to be synchronized, their engine-context-names must end with "_1", "_2" and so on
var _calendars4sync=12;	// MUST be specified to exact number of your calendars, or you will get errors.

function fSync(y,m,d) {
	var cn=gTheme[3].split("_");	// get current context id
	var no=parseInt(cn[1]),ctx;
	var r=fCalibrate(1,no+gdSelect[1]-m)[1]; // find the one needs refreshing
	for (var n=1; n<=_calendars4sync; n++)
		if (n!=no) {
			ctx=eval("gContainer."+cn[0]+"_"+n);
			if (!ctx) return;	// loading, not ready
			if (d>0) ctx.fUpdSelect(y,m,d);
			if (y!=gCurMonth[0]||m!=gCurMonth[1]||n==r&&gdSelect[1]!=0) ctx.fSetCal(y,m+n-no,0,false);
		}
}

// ======= the following plugin is coded for the multi-select plugin ========
// If you define a fAddListItem(strDate) and a fRemoveListItem(strDate) in the 
// container page, they will be called whenever dates are adding or removing from
// the range. You may make use of them to populate the listbox on your page.
// The format of param strDate can be modified in fDateString() function
// ------------------------------------------------------------------------
giMarkSelected=1+2;	// change the effects of selection
gcBGSelected="#fffacd";	// set the background color of selection


var gc=gContainer; //  Make objects shared between calendar contexts by moving them into the gContainer.
var gsPDS=gsAgShared+"_pds";
if (!eval(gsPDS)) eval(gsPDS+"=[]"); // selected date periods. It's an array of 1 or more time periods in array format [startdate,enddate]. (startdate and enddate are represented in UTC milliseconds)
var gsLS=gsAgShared+"_ls";
if (!eval(gsLS)) eval(gsLS+"=null"); // last selected date, in UTC milliseconds.

function fGetPDS() { // for external use
	return eval(gsPDS);
}

function fDateString(y,m,d) {
	return y+"/"+fPad0(m)+"/"+fPad0(d);
}

function fPad0(n) {
	return n<10?"0"+n:n;
}

function fCheckKeyPressed(key,e) {
	var ALT=1, CTRL=2, SHIFT=4, pr=false;
	if (key&&ALT) pr=NN4?e.modifiers&1:e.altKey;
	if (!pr&&key&&CTRL) pr=NN4?e.modifiers&2:e.ctrlKey;
	if (!pr&&key&&SHIFT) pr=NN4?e.modifiers&4:e.shiftKey;
	return pr;
}

function fAddDate(y,m,d) {
	var ag=fGetAgenda(y,m,d,false);
	if (fIsSelected(y,m,d)||ag[1]==null) return;
	if (gContainer.fAddListItem) gContainer.fAddListItem(fDateString(y,m,d));
}

function fRemoveDate(y,m,d) {
	if (gContainer.fRemoveListItem) gContainer.fRemoveListItem(fDateString(y,m,d));
}

function fAddRange(y,m,d,bBatch) {
	var dt=Date.UTC(y,m-1,d);
	if (eval(gsLS)==null||!bBatch) {
		fAddDate(y,m,d);
		eval(gsLS+"=dt");
		eval(gsPDS).push([dt,dt]);
	} else {
		var pd=[eval(gsLS),eval(gsLS)];
		eval(gsLS+"=dt");
		if (dt<pd[0]) pd[0]=dt;
		else if (pd[1]<dt) pd[1]=dt;
		for (var i=pd[0];i<=pd[1];i+=MILLIDAY) {
			var di=new Date(i);
			fAddDate(di.getUTCFullYear(),di.getUTCMonth()+1,di.getUTCDate());
		}
		eval(gsPDS).push(pd);
	}
	fMergePDS();
}

function fSort(a,b) {
	return a[0]<b[0]?-1:a[0]>b[0]?1:0;
}

function fMergePDS() {
	if (eval(gsPDS).length<=1) return;
	eval(gsPDS).sort(fSort);
	var tmpd=[eval(gsPDS)[0]];
	for (var i=0,j=1; j<eval(gsPDS).length; j++)
		if (tmpd[i][1]<eval(gsPDS)[j][0]-MILLIDAY) {
			i=tmpd.length;
			tmpd[i]=eval(gsPDS)[j];
		} else
			tmpd[i][1]=Math.max(tmpd[i][1],eval(gsPDS)[j][1]);
	eval(gsPDS+"=tmpd");
}

function fRemoveRange(y,m,d,bBatch) {
	var dt=Date.UTC(y,m-1,d);
	for (var i=0; i<eval(gsPDS).length; i++)
		if (eval(gsPDS)[i][0]<=dt&&eval(gsPDS)[i][1]>=dt) break;
	if (i==eval(gsPDS).length) return;
	if (bBatch||eval(gsPDS)[i][0]==eval(gsPDS)[i][1]) {
		for (var k=eval(gsPDS)[i][0];k<=eval(gsPDS)[i][1];k+=MILLIDAY) {
			var dk=new Date(k);
			fRemoveDate(dk.getUTCFullYear(),dk.getUTCMonth()+1,dk.getUTCDate());
		}
		fSplice(eval(gsPDS),i);
	} else {
		fRemoveDate(y,m,d);
		if (dt<eval(gsPDS)[i][1]) eval(gsPDS).push([dt+MILLIDAY,eval(gsPDS)[i][1]]);
		if (eval(gsPDS)[i][0]<dt) eval(gsPDS)[i][1]=dt-MILLIDAY;
		else fSplice(eval(gsPDS),i);
	}
	eval(gsLS+"=null");
}

function fClearAll() {
	var miny=10000, maxy=0;
	for (var i=eval(gsPDS).length-1; i>=0; i--) {
		var dt=new Date(eval(gsPDS)[i][0]);
		var y=dt.getUTCFullYear(),m=dt.getUTCMonth()+1,d=dt.getUTCDate();
		fRemoveRange(y,m,d,true);
		miny=Math.min(miny,y);
		maxy=Math.max(maxy,y);
	}
	for (var y=miny; y<=maxy; y++) {
		for (var w=1; w<=53; w++) fRemoveEvent(y, -w, 0);
		for (var m=1; m<=12; m++)
			for (var dow=1; dow<=7; dow++)
				fRemoveEvent(y, m, -dow);
	}
}

function fSplice(arr,n) { // made for IE5, push() had already been implemented in the engine
	for (var i=n; i<arr.length-1; i++) arr[i]=arr[i+1];
	arr[i]=null;
	arr.length--;
}

// ======= end of multi-select plugin ========