lib/overlib/overlib_anchor.js

   1 //\/////
   2 //\  overLIB Anchor Plugin
   3 //\  This file requires overLIB 4.10 or later.
   4 //\
   5 //\  overLIB 4.10 - You may not remove or change this notice.
   6 //\  Copyright Erik Bosrup 1998-2004. 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 ////////
  15 // PRE-INIT
  16 // Ignore these lines, configuration is below.
  17 ////////
  18 if (typeof olInfo == 'undefined' || typeof olInfo.meets == 'undefined' || !olInfo.meets(4.10)) alert('overLIB 4.10 or later is required for the Anchor Plugin.');
  19 else {
  20 registerCommands('anchor,anchorx,anchory,noanchorwarn,anchoralign');
  21
  22
  23
  24 ////////
  25 // DEFAULT CONFIGURATION
  26 // Settings you want everywhere are set here. All of this can also be
  27 // changed on your html page or through an overLIB call.
  28 ////////
  29 if (typeof ol_anchor ==  'undefined') var ol_anchor = '';
  30 if (typeof ol_anchorx ==  'undefined') var ol_anchorx = 0;
  31 if (typeof ol_anchory ==  'undefined') var ol_anchory = 0;
  32 if (typeof ol_noanchorwarn ==  'undefined') var ol_noanchorwarn = 1;
  33 if (typeof ol_anchoralign ==  'undefined') var ol_anchoralign = 'UL';
  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 ////////
  45 // INIT
  46 ////////
  47 // Runtime variables init. Don't change for config!
  48 var o3_anchor = "";
  49 var o3_anchorx = 0;
  50 var o3_anchory = 0;
  51 var o3_noanchorwarn = 1;
  52 var o3_anchoralign = 'UL';
  53 var mrkObj, rmrkPosition;  //reference mark object, reference mark position, an array;
  54
  55
  56 ////////
  57 // PLUGIN FUNCTIONS
  58 ////////
  59 function setAnchorVariables() {
  60         o3_anchor = ol_anchor;
  61         o3_anchorx = ol_anchorx;
  62         o3_anchory = ol_anchory;
  63         o3_noanchorwarn = ol_noanchorwarn;
  64         o3_anchoralign = ol_anchoralign;
  65         mrkObj = null;  // initialize this variable
  66 }
  67
  68 // Parses Reference Mark commands
  69 function parseAnchorExtras(pf,i,ar) {
  70         var v, k=i;
  71
  72         if (k < ar.length) {
  73                 if (ar[k] ==  ANCHOR) { eval(pf + "anchor = '" + escSglQuote(ar[++k]) + "'"); return k; }
  74                 if (ar[k] ==  ANCHORX) { eval(pf + 'anchorx = ' + ar[++k]); return k; }
  75                 if (ar[k] ==  ANCHORY) { eval(pf + 'anchory = ' + ar[++k]); return k; }
  76                 if (ar[k] ==  NOANCHORWARN) { eval(pf + 'noanchorwarn = (' + pf + 'noanchorwarn==1) ? 0 : 1'); return k; }
  77                 if (ar[k] ==  ANCHORALIGN) { k = opt_MULTIPLEARGS(++k, ar, (pf + 'anchoralign'));  return k; }
  78         }
  79
  80         return -1;
  81 }
  82
  83
  84 ///////
  85 //  FUNCTION WHICH CHECKS FOR THE EXISTENCE OF A REFERENCE MARKER
  86 ///////
  87 function checkAnchorObject() {
  88         var w = o3_anchor;
  89
  90         if (w) {
  91                 if (!(mrkObj = getAnchorObjectRef(w))) {
  92                         if (o3_noanchorwarn) {
  93                                 alert('WARNING!  Reference mark "' + w + '" not found.');
  94                                 return false;
  95                         } else w = '';
  96                 }
  97         }
  98
  99         return true;
 100 }
 101
 102 ///////
 103 // EXTERNAL SUPPORT FUNCTIONS TO HANDLE ANCHOR PROPERTIES
 104 ///////
 105
 106 // Horizontal placement routine with anchors
 107 function anchorHorizontal(browserWidth, horizontalScrollAmount, widthFix) {
 108         var hasAnchor = (typeof o3_anchor != 'undefined' && o3_anchor);
 109         if (!hasAnchor) return void(0);
 110
 111         // set o3_relx for follow scroll if defined
 112         if (typeof o3_followscroll != 'undefined' && o3_followscroll && o3_sticky) o3_relx = rmrkPosition[0];
 113
 114         return rmrkPosition[0];
 115 }
 116
 117 // Vertical placement routine with anchors
 118 function anchorVertical(browserHeight,verticalScrollAmount) {
 119         var hasAnchor = (typeof o3_anchor != 'undefined' && o3_anchor);
 120         if (!hasAnchor) return void(0);
 121
 122         // set o3_rely for follow scroll if defined
 123         if (typeof o3_followscroll != 'undefined' && o3_followscroll && o3_sticky) o3_rely = rmrkPosition[1];
 124
 125         return rmrkPosition[1];
 126 }
 127
 128 // Stub function for the runHook routine
 129 function anchorPreface() {
 130         if (!mrkObj) return;
 131         rmrkPosition = getAnchorLocation(mrkObj);
 132 }
 133
 134 // Get Reference Mark object
 135 function getAnchorObjectRef(aObj) {
 136         return getRefById(aObj, o3_frame.document) || getRefByName(aObj, o3_frame.document)
 137 }
 138
 139 // Adapted to overlib from jwin by Jason Anderson -- http://www.jwinlib.com
 140 function getAnchorLocation(objRef){
 141         var mkObj, of, offsets, mlyr
 142
 143         mkObj = mlyr = objRef
 144         offsets = [o3_anchorx, o3_anchory]
 145
 146         if (document.layers){
 147                 if (typeof mlyr.length != 'undefined' &&  mlyr.length > 1) {
 148                                 mkObj = mlyr[0]
 149                                 offsets[0] += mlyr[0].x + mlyr[1].pageX
 150                                 offsets[1] += mlyr[0].y + mlyr[1].pageY
 151                         } else {
 152                                 if(mlyr.toString().indexOf('Image') != -1 || mlyr.toString().indexOf('Anchor') != -1){
 153                                         offsets[0] += mlyr.x
 154                                         offsets[1] += mlyr.y
 155                                 } else {
 156                                         offsets[0] += mlyr.pageX
 157                                         offsets[1] += mlyr.pageY
 158                                 }
 159                         }
 160         } else {
 161                 offsets[0] += pageLocation(mlyr, 'Left')
 162                 offsets[1] += pageLocation(mlyr, 'Top')
 163         }
 164
 165         of = getAnchorOffsets(mkObj)
 166
 167         if (typeof o3_dragimg != 'undefined' &&  o3_dragimg) {
 168                 olImgLeft = offsets[0];
 169                 olImgTop = offsets[1];
 170         }
 171
 172         offsets[0] += of[0]
 173         offsets[1] += of[1]
 174
 175         if (typeof o3_dragimg != 'undefined' &&  o3_dragimg) {
 176                 olImgRight = offsets[0];
 177                 olImgBottom = offsets[1];
 178                 return;
 179         }
 180
 181         return offsets;
 182 }
 183
 184 // Adapted to overlib from jwin by Jason Anderson -- http://www.jwinlib.com
 185 function getAnchorOffsets(mkObj){
 186         var fx = fy = 0,  mp, puc, mkAry, sx = sy = 0, w = o3_anchoralign
 187         var mW = mH = pW = pH = 0
 188         var off = [0, 0]
 189
 190         mkAry = w.split(',');
 191
 192         if (mkAry.length < 3) {
 193                 mp = mkAry[0].toUpperCase();
 194                 puc = (mkAry.length == 1) ? mp : mkAry[1].toUpperCase();
 195         } else if (mkAry.length == 3) {
 196                 if (!isNaN(mkAry[0])) {
 197                         mp = mkAry.slice(0, 2);
 198                         puc = mkAry[2].toUpperCase();
 199                  } else {
 200                         mp = mkAry[0].toUpperCase();
 201                         puc = mkAry.slice(1);
 202                  }
 203         } else {
 204                 mp = mkAry.slice(0, 2);
 205                 puc = mkAry.slice(2);
 206         }
 207
 208         var shdwPresent = typeof o3_shadow != 'undefined' &&  o3_shadow
 209
 210         if (shdwPresent) {
 211                 sx = Math.abs(o3_shadowx);
 212                 sy = Math.abs(o3_shadowy);
 213         }
 214
 215         pW = (shdwPresent ? parseInt(o3_width) : (olNs4 ? over.clip.width : over.offsetWidth))
 216         pH = (shdwPresent ? parseInt(o3_aboveheight) : (olNs4 ? over.clip.height : over.offsetHeight))
 217
 218         if (olOp &&  o3_wrap) {
 219                 pW = (shdwPresent ? parseInt(o3_width) : (olNs4 ? over.clip.width : over.offsetWidth))
 220                 pH = (shdwPresent ? parseInt(o3_aboveheight) : (olNs4 ? over.clip.height : over.offsetHeight))
 221         }
 222
 223         if (!olOp &&  mkObj.toString().indexOf('Image') != -1){
 224                 mW = mkObj.width
 225                 mH = mkObj.height
 226         } else if (!olOp &&  mkObj.toString().indexOf('Anchor') != -1) {  // enforced only for NS4
 227                 mp = 'UL'
 228         } else {
 229                 mW = (olNs4) ? mkObj.clip.width : mkObj.offsetWidth
 230                 mH = (olNs4) ? mkObj.clip.height : mkObj.offsetHeight
 231         }
 232
 233         if (!isNaN(mp) || typeof mp == 'object') {
 234                 if (typeof mp == 'object') {
 235                         fx = parseFloat(mp[0]);
 236                         fy = parseFloat(mp[1]);
 237                 } else
 238                         fx = fy = parseFloat(mp);
 239                 off = [Math.round(fx*mW), Math.round(fy*mH)];
 240         } else {
 241                  if (mp == 'UR') off = [mW, 0]
 242                  else if (mp == 'LL') off = [0, mH]
 243                  else if (mp == 'LR') off = [mW, mH]
 244         }
 245
 246         if (typeof o3_dragimg != 'undefined' &&  o3_dragimg) return off;
 247         else {
 248                 if (!isNaN(puc) || typeof puc == 'object' ) {
 249                         if (typeof puc == 'object') {
 250                                 fx = parseFloat(puc[0]);
 251                                 fy = parseFloat(puc[1]);
 252                         } else
 253                                 fx = fy = parseFloat(puc);
 254                         off[0] -= Math.round(fx*(pW - sx));
 255                         off[1] -= Math.round(fy*(pH - sy));
 256                 } else {
 257                         if (puc == 'UR') {
 258                                 off[0] -= (pW - sx);
 259                                 off[1] -= sy
 260                         } else if (puc == 'LL') {
 261                                 off[0] -= sx;
 262                                 off[1] -= (pH - sy)
 263                         } else if (puc == 'LR') {
 264                                 off[0] -= (pW-sx);
 265                                 off[1] -= (pH - sy)
 266                         }
 267                 }
 268                 return off
 269         }
 270 }
 271
 272 // Adapted to overlib from jwin by Jason Anderson -- http://www.jwinlib.com
 273 function pageLocation(o, t){
 274         var x = 0
 275
 276         while(o.offsetParent){
 277                 x += o['offset' + t]
 278                 o = o.offsetParent
 279         }
 280         x += o['offset' + t]
 281
 282         return x
 283 }
 284
 285 // Adapted to overlib from jwin by Jason Anderson -- http://www.jwinlib.com
 286 function getRefById(l, d){
 287         var r = "", j
 288
 289         d = (d || document)
 290         if (d.all) return d.all[l]
 291         else if (d.getElementById) return d.getElementById(l)
 292         else if (d.layers &&  d.layers.length > 0) {
 293                 if (d.layers[l]) return d.layers[l]
 294
 295                 for (j=0; j < d.layers.length; j++) {
 296                         r = getRefById(l, d.layers[j].document)
 297                         if(r) return r
 298                 }
 299         }
 300
 301         return false
 302 }
 303
 304 // Adapted to overlib from jwin by Jason Anderson -- http://www.jwinlib.com
 305 function getRefByName(l, d) {
 306         var r = null, j
 307
 308         d = (d || document)
 309
 310         if (d.images[l]) return d.images[l]
 311         else if (d.anchors[l]) return d.anchors[l];
 312         else if (d.layers &&  d.layers.length > 0) {
 313                 for (j=0; j < d.layers.length; j++) {
 314                         r = getRefByName(l, d.layers[j].document)
 315                         if (r &&  r.length > 0) return r
 316                         else if (r) return [r, d.layers[j]]
 317                 }
 318         }
 319
 320         return null
 321 }
 322
 323 ////////
 324 // PLUGIN REGISTRATIONS
 325 ////////
 326 registerRunTimeFunction(setAnchorVariables);
 327 registerCmdLineFunction(parseAnchorExtras);
 328 registerPostParseFunction(checkAnchorObject);
 329 registerHook("createPopup", anchorPreface, FAFTER);
 330 registerHook("horizontalPlacement", anchorHorizontal, FCHAIN);
 331 registerHook("verticalPlacement", anchorVertical, FCHAIN);
 332 if(olInfo.meets(4.10)) registerNoParameterCommands('noanchorwarn');
 333 }