lib/overlib/overlib_shadow.js

   1 //\/////
   2 //\  overLIB Shadow Plugin
   3 //\  This file requires overLIB 4.10 or later.
   4 //\
   5 //\  overLIB 4.05 - You may not remove or change this notice.
   6 //\  Copyright Erik Bosrup 1998-2003. All rights reserved.
   7 //\  Contributors are listed on the homepage.
   8 //\  See http://www.bosrup.com/web/overlib/ for details.
   9 //   $Revision$                $Date$
  10 //\/////
  11 //\mini
  12
  13 ////////
  14 // PRE-INIT
  15 // Ignore these lines, configuration is below.
  16 ////////
  17 if (typeof olInfo == 'undefined' || typeof olInfo.meets == 'undefined' || !olInfo.meets(4.10)) alert('overLIB 4.10 or later is required for the Shadow Plugin.');
  18 else {
  19 registerCommands('shadow,shadowcolor,shadowimage,shadowopacity,shadowx,shadowy');
  20
  21
  22 ////////
  23 // DEFAULT CONFIGURATION
  24 // You don't have to change anything here if you don't want to. All of this can be
  25 // changed on your html page or through an overLIB call.
  26 ////////
  27 if (typeof ol_shadowadjust=='undefined') var ol_shadowadjust=2;  // for Ns4.x only
  28 if (typeof ol_shadow=='undefined') var ol_shadow=0;
  29 if (typeof ol_shadowcolor=='undefined') var ol_shadowcolor='#CCCCCC';
  30 if (typeof ol_shadowimage=='undefined') var  ol_shadowimage='';
  31 if (typeof ol_shadowopacity=='undefined') var  ol_shadowopacity=0;
  32 if (typeof ol_shadowx=='undefined') var ol_shadowx=5;
  33 if (typeof ol_shadowy=='undefined') var ol_shadowy=5;
  34
  35 ////////
  36 // END OF CONFIGURATION
  37 // Don't change anything below this line, all configuration is above.
  38 ////////
  39
  40
  41
  42
  43 ////////
  44 // INIT
  45 ////////
  46 // Runtime variables init. Don't change for config!
  47 var o3_shadow=0;
  48 var o3_shadowcolor="#cccccc";
  49 var o3_shadowimage='';
  50 var o3_shadowopacity=0;
  51 var o3_shadowx=5;
  52 var o3_shadowy=5;
  53 var bkSet=0;  // Needed for this effect in NS4
  54
  55
  56
  57 // Function which sets runtime variables to their default values
  58 function setShadowVariables() {
  59         o3_shadow=ol_shadow;
  60         o3_shadowcolor=ol_shadowcolor;
  61         o3_shadowimage=ol_shadowimage;
  62         o3_shadowopacity=ol_shadowopacity;
  63         o3_shadowx=ol_shadowx;
  64         o3_shadowy=ol_shadowy;
  65 }
  66
  67
  68 // Parses shadow commands
  69 function parseShadowExtras(pf,i,ar) {
  70         var k = i, v;
  71
  72         if (k < ar.length) {
  73                 if (ar[k]==SHADOW) { eval(pf +'shadow=('+pf+'shadow==0) ? 1 : 0'); return k; }
  74                 if (ar[k]==SHADOWCOLOR) { eval(pf+'shadowcolor="'+ar[++k]+'"'); return k; }
  75                 if (ar[k]==SHADOWOPACITY) {v=ar[++k]; eval(pf+'shadowopacity='+(olOp ? 0 : v)); return k; }
  76                 if (ar[k]==SHADOWIMAGE) { eval(pf+'shadowimage="'+ar[++k]+'"'); return k; }
  77                 if (ar[k]==SHADOWX) { eval(pf+'shadowx='+ar[++k]); return k; }
  78                 if (ar[k]==SHADOWY) { eval(pf+'shadowy='+ar[++k]); return k; }
  79         }
  80
  81         return -1;
  82 }
  83
  84
  85 // Function for MOUSEOUT/MOUSEOFF feature with shadow
  86 function shadow_cursorOff() {
  87         var left= parseInt(over.style.left);
  88         var top=parseInt(over.style.top);
  89         var right=left+(o3_shadow ? o3_width : over.offsetWidth);
  90         var bottom=top+(o3_shadow ? o3_aboveheight : over.offsetHeight);
  91
  92         if (o3_x < left || o3_x > right || o3_y < top || o3_y > bottom) return true;
  93         return false;
  94 }
  95
  96 // Pre-hide processing to clean-up.
  97 function checkShadowPreHide() {
  98         if (o3_shadow && o3_shadowopacity) cleanUpShadowEffects();
  99         if (o3_shadow && (olIe4 && isMac) ) over.style.pixelWidth=over.style.pixelHeight = 0;
 100 }
 101
 102
 103 // Funciton that creates the actual shadow
 104 function generateShadow(content) {
 105         var wd, ht, X = 0, Y = 0, zIdx = 0, txt, dpObj, puObj, bS= '', aPos, posStr=new Array();
 106
 107         if (!o3_shadow || (o3_shadowx == 0 && o3_shadowy == 0)) return;
 108
 109         X = Math.abs(o3_shadowx);
 110         Y = Math.abs(o3_shadowy);
 111         wd = parseInt(o3_width);
 112         ht = (olNs4) ? over.clip.height : over.offsetHeight;
 113
 114         if (o3_shadowx == 0) {
 115                 if (o3_shadowy < 0) {
 116                   posStr[0]=' left:0; top: 0';
 117                   posStr[1]=' left:0; top: '+Y+'px';
 118                 } else if (o3_shadowy > 0) {
 119                   posStr[0]=' left:0; top: '+Y+'px';
 120                   posStr[1]=' left:0; top:0';
 121                 }
 122         } else if (o3_shadowy == 0) {
 123                 if (o3_shadowx < 0) {
 124                   posStr[0]=' left:0; top: 0';
 125                   posStr[1]=' left: '+X+'px';
 126                 } else if (o3_shadowx > 0) {
 127                   posStr[0]=' left: '+ X+'px; top: 0';
 128                   posStr[1]=' left:0; top:0';
 129                 }
 130         } else if (o3_shadowx > 0) {
 131                 if (o3_shadowy > 0) {
 132                   posStr[0]=' left:'+ X+'px; top:'+Y+'px';
 133                   posStr[1]=' left:0; top:0';
 134                 } else if (o3_shadowy < 0) {
 135                   posStr[0]=' left:'+X+'px; top:0';
 136                   posStr[1]=' left:0; top: '+Y+'px';
 137                 }
 138         } else if (o3_shadowx < 0) {
 139                 if (o3_shadowy > 0) {
 140                   posStr[0]=' left:0; top:'+Y+'px';
 141                   posStr[1]=' left:'+X+'px; top:0';
 142                 } else if (o3_shadowy < 0) {
 143                   posStr[0]=' left:0; top:0';
 144                   posStr[1]=' left:'+X+'px; top:'+Y+'px';
 145                 }
 146         }
 147
 148         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++) + '; ';
 149
 150         if (o3_shadowimage) {
 151                 bS='background-image: url('+o3_shadowimage+');';
 152                 if (olNs4) bkSet=1;
 153         } else {
 154                 bS='background-color: '+o3_shadowcolor +';';
 155                 if (olNs4) bkSet=2;
 156         }
 157
 158         if (olNs4) {
 159                 txt += '<div id="PUContent">'+content+'</div>';
 160         } else {
 161                 txt += bS+'"></div><div id="PUContent" style="position: absolute;'+posStr[1]+'; width: '+ wd+'px; z-index: '+(zIdx++)+';">'+content+'</div>';
 162         }
 163
 164         layerWrite(txt);
 165
 166         if (olNs4 && bkSet) {
 167                 dpObj = over.document.layers['backdrop'];
 168                 if (typeof dpObj == 'undefined') return;  // if shadow layer not found, then content layer won't be either
 169
 170                 puObj = over.document.layers['PUContent'];
 171                 wd = puObj.clip.width;
 172                 ht = puObj.clip.height;
 173                 aPos = posStr[0].split(';');
 174
 175                 dpObj.clip.width = wd;
 176                 dpObj.clip.height = ht;
 177                 dpObj.left = parseInt(aPos[0].split(':')[1]);
 178                 dpObj.top = parseInt(aPos[1].split(':')[1]);
 179
 180     dpObj.bgColor = (bkSet == 1) ? null : o3_shadowcolor;
 181                 dpObj.background.src = (bkSet==2) ? null : o3_shadowimage;
 182                 dpObj.zIndex = 0;
 183
 184                 aPos = posStr[1].split(';');
 185                 puObj.left = parseInt(aPos[0].split(':')[1]);
 186                 puObj.top = parseInt(aPos[1].split(':')[1]);
 187                 puObj.zIndex = 1;
 188
 189         } else {
 190                 puObj = (olIe4 ? o3_frame.document.all['PUContent'] : o3_frame.document.getElementById('PUContent'));
 191                 dpObj = (olIe4 ? o3_frame.document.all['backdrop'] : o3_frame.document.getElementById('backdrop'));
 192                 ht = puObj.offsetHeight;
 193                 dpObj.style.height = ht + 'px';
 194
 195                 if (o3_shadowopacity) {
 196                         var op = o3_shadowopacity;
 197                         op = (op <= 100 ? op : 100);
 198
 199                         setBrowserOpacity(op,dpObj);
 200                 }
 201         }
 202
 203         // Set popup's new width and height values here so they are available in placeLayer()
 204         o3_width = wd+X;
 205         o3_aboveheight = ht+Y;
 206 }
 207
 208
 209 ////////
 210 // SUPPORT FUNCTIONS
 211 ////////
 212
 213 // Cleans up opacity settings if any.
 214 function cleanUpShadowEffects() {
 215         if (olNs4 || olOp) return;
 216         var dpObj=(olIe4 ? o3_frame.document.all['backdrop'] : o3_frame.document.getElementById('backdrop'));
 217         cleanUpBrowserOpacity(dpObj);
 218 }
 219
 220 // multi browser opacity support
 221 function setBrowserOpacity(op,lyr){
 222         if (olNs4||!op) return;  // if Ns4.x or opacity not given return;
 223         lyr=(lyr) ? lyr : over;
 224         if (olIe4&&typeof lyr.filters != 'undefined') {
 225                 lyr.style.filter='Alpha(Opacity='+op+')';
 226                 lyr.filters.alpha.enabled=true;
 227         } else {
 228                 var sOp=(typeof(lyr.style.MozOpacity)!='undefined') ? 'MozOpacity' : (typeof(lyr.style.KhtmlOpacity)!='undefined' ? 'KhtmlOpacity' : (typeof(lyr.style.opacity)!='undefined' ? 'opacity' : ''));
 229                 if (sOp) eval('lyr.style.'+sOp+'=op/100');
 230         }
 231 }
 232
 233 // multi-browser Opacity cleanup
 234 function cleanUpBrowserOpacity(lyr) {
 235         if (olNs4) return;
 236         lyr=(lyr) ? lyr : over;
 237         if (olIe4&&(typeof lyr.filters != 'undefined'&&lyr.filters.alpha.enabled)) {
 238                 lyr.style.filter='Alpha(Opacity=100)';
 239                 lyr.filters.alpha.enabled=false;
 240         } else {
 241                 var sOp=(typeof(lyr.style.MozOpacity)!='undefined') ? 'MozOpacity' : (typeof(lyr.style.KhtmlOpacity)!='undefined' ? 'KhtmlOpacity' : (typeof(lyr.style.opacity)!='undefined' ? 'opacity' : ''));
 242                 if (sOp) eval('lyr.style.'+sOp+'=1.0');
 243         }
 244 }
 245
 246 // This routine is needed only for Ns4.x to allow use of popups with dropshadows and CSSCLASS at the same time on a page
 247 function shadowAdjust() {
 248         if (!olNs4) return;
 249         var fac = ol_shadowadjust;
 250         if (olNs4) {
 251                 document.write('<style type="text/css">\n<!--\n');
 252                 document.write('#backdrop, #PUContent {position: absolute; left: '+fac*o3_shadowx+'px; top: '+fac*o3_shadowy+'px; }\n');
 253                 document.write('-->\n<' + '\/style>');
 254         }
 255 }
 256
 257 ////////
 258 // PLUGIN REGISTRATIONS
 259 ////////
 260 var before = (typeof rmrkPreface!='undefined' ? rmrkPreface : null);
 261
 262 registerRunTimeFunction(setShadowVariables);
 263 registerCmdLineFunction(parseShadowExtras);
 264 registerHook("cursorOff",shadow_cursorOff,FREPLACE);
 265 registerHook("hideObject",checkShadowPreHide,FBEFORE);
 266 registerHook("createPopup",generateShadow,FAFTER,before);
 267 if (olInfo.meets(4.10)) registerNoParameterCommands('shadow');
 268
 269 if (olNs4) shadowAdjust();  // write style rules for proper support of Ns4.x
 270 }