Metacat

//\/////

//\  overLIB Shadow Plugin

//\  This file requires overLIB 4.10 or later.

//\

//\  overLIB 4.05 - You may not remove or change this notice.

//\  Copyright Erik Bosrup 1998-2003. All rights reserved.

//\  Contributors are listed on the homepage.

//\  See http://www.bosrup.com/web/overlib/ for details.

//   $Revision$                $Date$

//\/////

//\mini

////////

// PRE-INIT

// Ignore these lines, configuration is below.

////////

if (typeof olInfo == 'undefined' || typeof olInfo.meets == 'undefined' || !olInfo.meets(4.10)) alert('overLIB 4.10 or later is required for the Shadow Plugin.');

else {

registerCommands('shadow,shadowcolor,shadowimage,shadowopacity,shadowx,shadowy');

////////

// DEFAULT CONFIGURATION

// You don't have to change anything here if you don't want to. All of this can be

// changed on your html page or through an overLIB call.

////////

if (typeof ol_shadowadjust=='undefined') var ol_shadowadjust=2;  // for Ns4.x only

if (typeof ol_shadow=='undefined') var ol_shadow=0;

if (typeof ol_shadowcolor=='undefined') var ol_shadowcolor='#CCCCCC';

if (typeof ol_shadowimage=='undefined') var  ol_shadowimage='';

if (typeof ol_shadowopacity=='undefined') var  ol_shadowopacity=0;

if (typeof ol_shadowx=='undefined') var ol_shadowx=5;

if (typeof ol_shadowy=='undefined') var ol_shadowy=5;

////////

// END OF CONFIGURATION

// Don't change anything below this line, all configuration is above.

////////

////////

// INIT

////////

// Runtime variables init. Don't change for config!

var o3_shadow=0;

var o3_shadowcolor="#cccccc";

var o3_shadowimage='';

var o3_shadowopacity=0;

var o3_shadowx=5;

var o3_shadowy=5;

var bkSet=0;  // Needed for this effect in NS4

// Function which sets runtime variables to their default values

function setShadowVariables() {

	o3_shadow=ol_shadow;

	o3_shadowcolor=ol_shadowcolor;

	o3_shadowimage=ol_shadowimage;

	o3_shadowopacity=ol_shadowopacity;

	o3_shadowx=ol_shadowx;

	o3_shadowy=ol_shadowy;

}

// Parses shadow commands

function parseShadowExtras(pf,i,ar) {

	var k = i, v;

	if (k < ar.length) {

		if (ar[k]==SHADOW) { eval(pf +'shadow=('+pf+'shadow==0) ? 1 : 0'); return k; }

		if (ar[k]==SHADOWCOLOR) { eval(pf+'shadowcolor="'+ar[++k]+'"'); return k; }

		if (ar[k]==SHADOWOPACITY) {v=ar[++k]; eval(pf+'shadowopacity='+(olOp ? 0 : v)); return k; }

		if (ar[k]==SHADOWIMAGE) { eval(pf+'shadowimage="'+ar[++k]+'"'); return k; }

		if (ar[k]==SHADOWX) { eval(pf+'shadowx='+ar[++k]); return k; }

		if (ar[k]==SHADOWY) { eval(pf+'shadowy='+ar[++k]); return k; }

	}

	return -1;

}

// Function for MOUSEOUT/MOUSEOFF feature with shadow

function shadow_cursorOff() {

	var left= parseInt(over.style.left);

	var top=parseInt(over.style.top);

	var right=left+(o3_shadow ? o3_width : over.offsetWidth);

	var bottom=top+(o3_shadow ? o3_aboveheight : over.offsetHeight);

	if (o3_x < left || o3_x > right || o3_y < top || o3_y > bottom) return true;

	return false;

}

// Pre-hide processing to clean-up.

function checkShadowPreHide() {

	if (o3_shadow && o3_shadowopacity) cleanUpShadowEffects();

	if (o3_shadow && (olIe4 && isMac) ) over.style.pixelWidth=over.style.pixelHeight = 0;

}

// Funciton that creates the actual shadow

function generateShadow(content) {

	var wd, ht, X = 0, Y = 0, zIdx = 0, txt, dpObj, puObj, bS= '', aPos, posStr=new Array();

	if (!o3_shadow || (o3_shadowx == 0 && o3_shadowy == 0)) return;

	X = Math.abs(o3_shadowx);

	Y = Math.abs(o3_shadowy);

	wd = parseInt(o3_width);

	ht = (olNs4) ? over.clip.height : over.offsetHeight;

	if (o3_shadowx == 0) {

		if (o3_shadowy < 0) {

		  posStr[0]=' left:0; top: 0';

		  posStr[1]=' left:0; top: '+Y+'px';

		} else if (o3_shadowy > 0) {

		  posStr[0]=' left:0; top: '+Y+'px';

		  posStr[1]=' left:0; top:0';

		}

	} else if (o3_shadowy == 0) {

		if (o3_shadowx < 0) {

		  posStr[0]=' left:0; top: 0';

		  posStr[1]=' left: '+X+'px';

		} else if (o3_shadowx > 0) {

		  posStr[0]=' left: '+ X+'px; top: 0';

		  posStr[1]=' left:0; top:0';

		}

	} else if (o3_shadowx > 0) {

		if (o3_shadowy > 0) {

		  posStr[0]=' left:'+ X+'px; top:'+Y+'px';

		  posStr[1]=' left:0; top:0';

		} else if (o3_shadowy < 0) {

		  posStr[0]=' left:'+X+'px; top:0';

		  posStr[1]=' left:0; top: '+Y+'px';

		}

	} else if (o3_shadowx < 0) {

		if (o3_shadowy > 0) {

		  posStr[0]=' left:0; top:'+Y+'px';

		  posStr[1]=' left:'+X+'px; top:0';

		} else if (o3_shadowy < 0) {

		  posStr[0]=' left:0; top:0';

		  posStr[1]=' left:'+X+'px; top:'+Y+'px';

		}

	}

	txt = (olNs4) ? '<div id="backdrop"></div>' : ((olIe55&&olHideForm) ? backDropSource(wd+X,ht+Y,zIdx++) : '') + '<div id="backdrop" style="position: absolute;'+posStr[0]+'; width: '+wd+'px; height: '+ht+'px; z-index: ' + (zIdx++) + '; ';

	if (o3_shadowimage) {

		bS='background-image: url('+o3_shadowimage+');';

		if (olNs4) bkSet=1;

	} else { 

		bS='background-color: '+o3_shadowcolor +';';

		if (olNs4) bkSet=2;

	}

	if (olNs4) {

		txt += '<div id="PUContent">'+content+'</div>';

	} else {

		txt += bS+'"></div><div id="PUContent" style="position: absolute;'+posStr[1]+'; width: '+ wd+'px; z-index: '+(zIdx++)+';">'+content+'</div>';

	}

	layerWrite(txt);

	if (olNs4 && bkSet) {

		dpObj = over.document.layers['backdrop'];

		if (typeof dpObj == 'undefined') return;  // if shadow layer not found, then content layer won't be either

		puObj = over.document.layers['PUContent'];

		wd = puObj.clip.width;

		ht = puObj.clip.height;

		aPos = posStr[0].split(';');

		dpObj.clip.width = wd;

		dpObj.clip.height = ht;

		dpObj.left = parseInt(aPos[0].split(':')[1]);

		dpObj.top = parseInt(aPos[1].split(':')[1]);

    dpObj.bgColor = (bkSet == 1) ? null : o3_shadowcolor;

		dpObj.background.src = (bkSet==2) ? null : o3_shadowimage;

		dpObj.zIndex = 0;

		aPos = posStr[1].split(';');

		puObj.left = parseInt(aPos[0].split(':')[1]);

		puObj.top = parseInt(aPos[1].split(':')[1]);

		puObj.zIndex = 1;

	} else {

		puObj = (olIe4 ? o3_frame.document.all['PUContent'] : o3_frame.document.getElementById('PUContent'));

		dpObj = (olIe4 ? o3_frame.document.all['backdrop'] : o3_frame.document.getElementById('backdrop'));

		ht = puObj.offsetHeight;

		dpObj.style.height = ht + 'px';

		if (o3_shadowopacity) {

			var op = o3_shadowopacity;

			op = (op <= 100 ? op : 100);

			setBrowserOpacity(op,dpObj);

		}

	} 

	// Set popup's new width and height values here so they are available in placeLayer()

	o3_width = wd+X;

	o3_aboveheight = ht+Y;

}

////////

// SUPPORT FUNCTIONS

////////

// Cleans up opacity settings if any.

function cleanUpShadowEffects() {

	if (olNs4 || olOp) return;

	var dpObj=(olIe4 ? o3_frame.document.all['backdrop'] : o3_frame.document.getElementById('backdrop'));

	cleanUpBrowserOpacity(dpObj);

}

// multi browser opacity support

function setBrowserOpacity(op,lyr){

	if (olNs4||!op) return;  // if Ns4.x or opacity not given return;

	lyr=(lyr) ? lyr : over;

	if (olIe4&&typeof lyr.filters != 'undefined') {

		lyr.style.filter='Alpha(Opacity='+op+')';

		lyr.filters.alpha.enabled=true;

	} else {

		var sOp=(typeof(lyr.style.MozOpacity)!='undefined') ? 'MozOpacity' : (typeof(lyr.style.KhtmlOpacity)!='undefined' ? 'KhtmlOpacity' : (typeof(lyr.style.opacity)!='undefined' ? 'opacity' : '')); 

		if (sOp) eval('lyr.style.'+sOp+'=op/100');

	}

}

// multi-browser Opacity cleanup

function cleanUpBrowserOpacity(lyr) {

	if (olNs4) return;

	lyr=(lyr) ? lyr : over;

	if (olIe4&&(typeof lyr.filters != 'undefined'&&lyr.filters.alpha.enabled)) {

		lyr.style.filter='Alpha(Opacity=100)';

		lyr.filters.alpha.enabled=false;

	} else {

		var sOp=(typeof(lyr.style.MozOpacity)!='undefined') ? 'MozOpacity' : (typeof(lyr.style.KhtmlOpacity)!='undefined' ? 'KhtmlOpacity' : (typeof(lyr.style.opacity)!='undefined' ? 'opacity' : '')); 

		if (sOp) eval('lyr.style.'+sOp+'=1.0');

	}

}

// This routine is needed only for Ns4.x to allow use of popups with dropshadows and CSSCLASS at the same time on a page

function shadowAdjust() {

	if (!olNs4) return;

	var fac = ol_shadowadjust;

	if (olNs4) {

		document.write('<style type="text/css">\n<!--\n');

		document.write('#backdrop, #PUContent {position: absolute; left: '+fac*o3_shadowx+'px; top: '+fac*o3_shadowy+'px; }\n');

		document.write('-->\n<' + '\/style>');

	}

}

////////

// PLUGIN REGISTRATIONS

////////

var before = (typeof rmrkPreface!='undefined' ? rmrkPreface : null);

registerRunTimeFunction(setShadowVariables);

registerCmdLineFunction(parseShadowExtras);

registerHook("cursorOff",shadow_cursorOff,FREPLACE);

registerHook("hideObject",checkShadowPreHide,FBEFORE);

registerHook("createPopup",generateShadow,FAFTER,before);

if (olInfo.meets(4.10)) registerNoParameterCommands('shadow');

if (olNs4) shadowAdjust();  // write style rules for proper support of Ns4.x

}