GnuBook/GnuBook.js

   1 /*
   2 Copyright(c)2008 Internet Archive. Software license AGPL version 3.
   3
   4 This file is part of GnuBook.
   5
   6     GnuBook is free software: you can redistribute it and/or modify
   7     it under the terms of the GNU Affero General Public License as published by
   8     the Free Software Foundation, either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     GnuBook is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU Affero General Public License for more details.
  15
  16     You should have received a copy of the GNU Affero General Public License
  17     along with GnuBook.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 archive.org cvs $Revision: 1.57 $ $Date: 2008-10-27 05:47:40 $
  20 */
  21
  22 // GnuBook()
  23 //______________________________________________________________________________
  24 // After you instantiate this object, you must supply the following
  25 // book-specific functions, before calling init():
  26 //  - getPageWidth()
  27 //  - getPageHeight()
  28 //  - getPageURI()
  29 // You must also add a numLeafs property before calling init().
  30
  31 function GnuBook() {
  32     this.reduce  = 4;
  33     this.padding = 10;
  34     this.mode    = 1; //1 or 2
  35
  36     this.displayedLeafs = [];
  37     //this.leafsToDisplay = [];
  38     this.imgs = {};
  39     this.prefetchedImgs = {}; //an object with numeric keys cooresponding to leafNum
  40
  41     this.timer     = null;
  42     this.animating = false;
  43     this.auto      = false;
  44     this.autoTimer = null;
  45     this.flipSpeed = 'fast';
  46
  47     this.twoPagePopUp = null;
  48     this.leafEdgeTmp  = null;
  49
  50     this.searchResults = {};
  51
  52     this.firstIndex = null;
  53
  54 };
  55
  56 // init()
  57 //______________________________________________________________________________
  58 GnuBook.prototype.init = function() {
  59
  60     var startLeaf = window.location.hash;
  61     var title = this.bookTitle.substr(0,50);
  62     if (this.bookTitle.length>50) title += '...';
  63
  64     $("#GnuBook").empty();
  65     $("#GnuBook").append("<div id='GBtoolbar'><span style='float:left;'><img class='GBicon' src='http://www.us.archive.org/GnuBook/images/zoom_out.png' onclick='gb.zoom1up(-1); return false;'> <img class='GBicon' src='http://www.us.archive.org/GnuBook/images/zoom_in.png' onclick='gb.zoom1up(1); return false;'> zoom: <span id='GBzoom'>25</span>% <img class='GBicon' src='http://www.us.archive.org/GnuBook/images/script.png' onclick='gb.switchMode(1); return false;'> <img class='GBicon' src='http://www.us.archive.org/GnuBook/images/book_open.png' onclick='gb.switchMode(2); return false;'>  &nbsp;&nbsp; <a href='"+this.bookUrl+"' target='_blank'>"+title+"</a></span></div>");
  66     $("#GBtoolbar").append("<form class='GBpageform' action='javascript:' onsubmit='gb.jumpToPage(this.elements[0].value)'><img class='GBicon' src='http://www.us.archive.org/GnuBook/images/page_code.png' onclick='gb.showEmbedCode(); return false;'> page:<input id='GBpagenum' type='text' size='3' onfocus='gb.autoStop();'></input> <img class='GBicon' src='http://www.us.archive.org/GnuBook/images/book_previous.png' onclick='gb.prev(); return false;'> <img class='GBicon' src='http://www.us.archive.org/GnuBook/images/book_next.png' onclick='gb.next(); return false;'> <img class='GBicon' id='autoImg' src='http://www.us.archive.org/GnuBook/images/control_play_blue.png' onclick='gb.autoToggle(); return false;'></form>");
  67     $("#GnuBook").append("<div id='GBcontainer'></div>");
  68     $("#GBcontainer").append("<div id='GBpageview'></div>");
  69
  70     $("#GBcontainer").bind('scroll', this, function(e) {
  71         e.data.loadLeafs();
  72     });
  73
  74     $(window).bind('resize', this, function(e) {
  75         //console.log('resize!');
  76         if (1 == e.data.mode) {
  77             //console.log('centering 1page view');
  78             e.data.centerPageView();
  79             $('#GBpageview').empty()
  80             e.data.displayedLeafs = [];
  81             e.data.updateSearchHilites(); //deletes hilights but does not call remove()
  82             e.data.loadLeafs();
  83         } else {
  84             //console.log('drawing 2 page view');
  85             e.data.prepareTwoPageView();
  86         }
  87     });
  88
  89     if (1 == this.mode) {
  90         this.resizePageView();
  91
  92         if ('' != startLeaf) {
  93             this.jumpToIndex(parseInt(startLeaf.substr(1)));
  94             //alert('jump to ' + startLeaf);
  95         }
  96     } else {
  97         this.displayedLeafs=[0];
  98         this.prepareTwoPageView();
  99         //if (this.auto) this.nextPage();
 100     }
 101 }
 102
 103 // drawLeafs()
 104 //______________________________________________________________________________
 105 GnuBook.prototype.drawLeafs = function() {
 106     if (1 == this.mode) {
 107         this.drawLeafsOnePage();
 108     } else {
 109         this.drawLeafsTwoPage();
 110     }
 111 }
 112
 113
 114 // drawLeafsOnePage()
 115 //______________________________________________________________________________
 116 GnuBook.prototype.drawLeafsOnePage = function() {
 117     //alert('drawing leafs!');
 118     this.timer = null;
 119
 120
 121     var scrollTop = $('#GBcontainer').attr('scrollTop');
 122     var scrollBottom = scrollTop + $('#GBcontainer').height();
 123     //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
 124
 125     var leafsToDisplay = [];
 126
 127     var i;
 128     var leafTop = 0;
 129     var leafBottom = 0;
 130     for (i=0; i<this.numLeafs; i++) {
 131         var height  = parseInt(this.getPageHeight(i)/this.reduce);
 132
 133         leafBottom += height;
 134         //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
 135         var topInView    = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
 136         var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
 137         var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
 138         if (topInView | bottomInView | middleInView) {
 139             //console.log('to display: ' + i);
 140             leafsToDisplay.push(i);
 141         }
 142         leafTop += height +10;
 143         leafBottom += 10;
 144     }
 145
 146     var firstLeafToDraw  = leafsToDisplay[0];
 147     window.location.hash = firstLeafToDraw;
 148     this.firstIndex      = firstLeafToDraw;
 149
 150     if ((0 != firstLeafToDraw) && (1 < this.reduce)) {
 151         firstLeafToDraw--;
 152         leafsToDisplay.unshift(firstLeafToDraw);
 153     }
 154
 155     var lastLeafToDraw = leafsToDisplay[leafsToDisplay.length-1];
 156     if ( ((this.numLeafs-1) != lastLeafToDraw) && (1 < this.reduce) ) {
 157         leafsToDisplay.push(lastLeafToDraw+1);
 158     }
 159
 160     leafTop = 0;
 161     var i;
 162     for (i=0; i<firstLeafToDraw; i++) {
 163         leafTop += parseInt(this.getPageHeight(i)/this.reduce) +10;
 164     }
 165
 166     //var viewWidth = $('#GBpageview').width(); //includes scroll bar width
 167     var viewWidth = $('#GBcontainer').attr('scrollWidth');
 168
 169
 170     for (i=0; i<leafsToDisplay.length; i++) {
 171         var leafNum = leafsToDisplay[i];
 172         var height  = parseInt(this.getPageHeight(leafNum)/this.reduce);
 173
 174         if(-1 == jQuery.inArray(leafsToDisplay[i], this.displayedLeafs)) {
 175             var width   = parseInt(this.getPageWidth(leafNum)/this.reduce);
 176             //console.log("displaying leaf " + leafsToDisplay[i] + ' leafTop=' +leafTop);
 177             var div = document.createElement("div");
 178             div.className = 'GBpagediv1up';
 179             div.id = 'pagediv'+leafNum;
 180             div.style.position = "absolute";
 181             $(div).css('top', leafTop + 'px');
 182             var left = (viewWidth-width)>>1;
 183             if (left<0) left = 0;
 184             $(div).css('left', left+'px');
 185             $(div).css('width', width+'px');
 186             $(div).css('height', height+'px');
 187             //$(div).text('loading...');
 188
 189             $('#GBpageview').append(div);
 190
 191             var img = document.createElement("img");
 192             img.src = this.getPageURI(leafNum);
 193             $(img).css('width', width+'px');
 194             $(img).css('height', height+'px');
 195             $(div).append(img);
 196
 197         } else {
 198             //console.log("not displaying " + leafsToDisplay[i] + ' score=' + jQuery.inArray(leafsToDisplay[i], this.displayedLeafs));
 199         }
 200
 201         leafTop += height +10;
 202
 203     }
 204
 205     for (i=0; i<this.displayedLeafs.length; i++) {
 206         if (-1 == jQuery.inArray(this.displayedLeafs[i], leafsToDisplay)) {
 207             var leafNum = this.displayedLeafs[i];
 208             //console.log('Removing leaf ' + leafNum);
 209             //console.log('id='+'#pagediv'+leafNum+ ' top = ' +$('#pagediv'+leafNum).css('top'));
 210             $('#pagediv'+leafNum).remove();
 211         } else {
 212             //console.log('NOT Removing leaf ' + this.displayedLeafs[i]);
 213         }
 214     }
 215
 216     this.displayedLeafs = leafsToDisplay.slice();
 217     this.updateSearchHilites();
 218
 219     if (null != this.getPageNum(firstLeafToDraw))  {
 220         $("#GBpagenum").val(this.getPageNum(firstLeafToDraw));
 221     } else {
 222         $("#GBpagenum").val('');
 223     }
 224 }
 225
 226 // drawLeafsTwoPage()
 227 //______________________________________________________________________________
 228 GnuBook.prototype.drawLeafsTwoPage = function() {
 229     //alert('drawing two leafs!');
 230
 231     var scrollTop = $('#GBcontainer').attr('scrollTop');
 232     var scrollBottom = scrollTop + $('#GBcontainer').height();
 233     var leafNum = this.currentLeafL;
 234     var height  = this.getPageHeight(leafNum);
 235     var width   = this.getPageWidth(leafNum);
 236     var handSide= this.getPageSide(leafNum);
 237
 238     var leafEdgeWidthL = parseInt( (leafNum/this.numLeafs)*this.twoPageEdgeW );
 239     var leafEdgeWidthR = this.twoPageEdgeW - leafEdgeWidthL;
 240     var divWidth = this.twoPageW*2+20 + this.twoPageEdgeW;
 241     var divLeft = ($('#GBcontainer').width() - divWidth) >> 1;
 242     //console.log(leafEdgeWidthL);
 243
 244     var middle = ($('#GBcontainer').width() >> 1);
 245     var left = middle - this.twoPageW;
 246     var top  = ($('#GBcontainer').height() - this.twoPageH) >> 1;
 247
 248     var scaledW = parseInt(this.twoPageH*width/height);
 249     left = 10+leafEdgeWidthL;
 250     //var right = left+scaledW;
 251     var right = $(this.twoPageDiv).width()-11-$(this.leafEdgeL).width()-scaledW;
 252
 253     var gutter = middle+parseInt((2*this.currentLeafL - this.numLeafs)*this.twoPageEdgeW/this.numLeafs/2);
 254
 255
 256     this.prefetchImg(leafNum);
 257     $(this.prefetchedImgs[leafNum]).css({
 258         position: 'absolute',
 259         /*right:   gutter+'px',*/
 260         left: gutter-scaledW+'px',
 261         top:    top+'px',
 262         backgroundColor: 'rgb(234, 226, 205)',
 263         height: this.twoPageH +'px',
 264         width:  scaledW + 'px',
 265         borderRight: '1px solid black',
 266         zIndex: 2
 267     }).appendTo('#GBcontainer');
 268     //$('#GBcontainer').append(this.prefetchedImgs[leafNum]);
 269
 270
 271     var leafNum = this.currentLeafR;
 272     var height  = this.getPageHeight(leafNum);
 273     var width   = this.getPageWidth(leafNum);
 274     //    var left = ($('#GBcontainer').width() >> 1);
 275     left += scaledW;
 276
 277     var scaledW = this.twoPageH*width/height;
 278     this.prefetchImg(leafNum);
 279     $(this.prefetchedImgs[leafNum]).css({
 280         position: 'absolute',
 281         left:   gutter+'px',
 282         top:    top+'px',
 283         backgroundColor: 'rgb(234, 226, 205)',
 284         height: this.twoPageH + 'px',
 285         width:  scaledW + 'px',
 286         borderLeft: '1px solid black',
 287         zIndex: 2
 288     }).appendTo('#GBcontainer');
 289     //$('#GBcontainer').append(this.prefetchedImgs[leafNum]);
 290
 291
 292     this.displayedLeafs = [this.currentLeafL, this.currentLeafR];
 293     this.setClickHandlers();
 294
 295     this.updatePageNumBox2UP();
 296 }
 297
 298 // updatePageNumBox2UP
 299 //______________________________________________________________________________
 300 GnuBook.prototype.updatePageNumBox2UP = function() {
 301     if (null != this.getPageNum(this.currentLeafL))  {
 302         $("#GBpagenum").val(this.getPageNum(this.currentLeafL));
 303     } else {
 304         $("#GBpagenum").val('');
 305     }
 306     window.location.hash = this.currentLeafL;
 307 }
 308
 309 // loadLeafs()
 310 //______________________________________________________________________________
 311 GnuBook.prototype.loadLeafs = function() {
 312
 313
 314     var self = this;
 315     if (null == this.timer) {
 316         this.timer=setTimeout(function(){self.drawLeafs()},250);
 317     } else {
 318         clearTimeout(this.timer);
 319         this.timer=setTimeout(function(){self.drawLeafs()},250);
 320     }
 321 }
 322
 323
 324 // zoom1up()
 325 //______________________________________________________________________________
 326 GnuBook.prototype.zoom1up = function(dir) {
 327     if (2 == this.mode) {     //can only zoom in 1-page mode
 328         this.switchMode(1);
 329         return;
 330     }
 331
 332     if (1 == dir) {
 333         if (this.reduce <= 0.5) return;
 334         this.reduce*=0.5;           //zoom in
 335     } else {
 336         if (this.reduce >= 8) return;
 337         this.reduce*=2;             //zoom out
 338     }
 339
 340     this.resizePageView();
 341
 342     $('#GBpageview').empty()
 343     this.displayedLeafs = [];
 344     this.loadLeafs();
 345
 346     $('#GBzoom').text(100/this.reduce);
 347 }
 348
 349
 350 // resizePageView()
 351 //______________________________________________________________________________
 352 GnuBook.prototype.resizePageView = function() {
 353     var i;
 354     var viewHeight = 0;
 355     //var viewWidth  = $('#GBcontainer').width(); //includes scrollBar
 356     var viewWidth  = $('#GBcontainer').attr('clientWidth');
 357
 358     var oldScrollTop  = $('#GBcontainer').attr('scrollTop');
 359     var oldViewHeight = $('#GBpageview').height();
 360     if (0 != oldViewHeight) {
 361         var scrollRatio = oldScrollTop / oldViewHeight;
 362     } else {
 363         var scrollRatio = 0;
 364     }
 365
 366     for (i=0; i<this.numLeafs; i++) {
 367         viewHeight += parseInt(this.getPageHeight(i)/this.reduce) + this.padding;
 368         var width = parseInt(this.getPageWidth(i)/this.reduce);
 369         if (width>viewWidth) viewWidth=width;
 370     }
 371     $('#GBpageview').height(viewHeight);
 372     $('#GBpageview').width(viewWidth);
 373
 374     $('#GBcontainer').attr('scrollTop', Math.floor(scrollRatio*viewHeight));
 375
 376     this.centerPageView();
 377     this.loadLeafs();
 378
 379 }
 380
 381 // centerPageView()
 382 //______________________________________________________________________________
 383 GnuBook.prototype.centerPageView = function() {
 384
 385     var scrollWidth  = $('#GBcontainer').attr('scrollWidth');
 386     var clientWidth  =  $('#GBcontainer').attr('clientWidth');
 387     //console.log('sW='+scrollWidth+' cW='+clientWidth);
 388     if (scrollWidth > clientWidth) {
 389         $('#GBcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
 390     }
 391
 392 }
 393
 394 // jumpToPage()
 395 //______________________________________________________________________________
 396 GnuBook.prototype.jumpToPage = function(pageNum) {
 397     //if (2 == this.mode) return;
 398
 399     var i;
 400     var foundPage = false;
 401     var foundLeaf = null;
 402     for (i=0; i<this.numLeafs; i++) {
 403         if (this.getPageNum(i) == pageNum) {
 404             foundPage = true;
 405             foundLeaf = i;
 406             break;
 407         }
 408     }
 409
 410     if (foundPage) {
 411         var leafTop = 0;
 412         var h;
 413         this.jumpToIndex(foundLeaf);
 414         $('#GBcontainer').attr('scrollTop', leafTop);
 415     } else {
 416         alert('Page not found. This book might not have pageNumbers in scandata.');
 417     }
 418 }
 419
 420 // jumpToIndex()
 421 //______________________________________________________________________________
 422 GnuBook.prototype.jumpToIndex = function(index) {
 423     if (2 == this.mode) {
 424         this.autoStop();
 425         if (index<this.currentLeafL) {
 426             if ('L' == this.getPageSide(index)) {
 427                 this.flipBackToIndex(index);
 428             } else {
 429                 this.flipBackToIndex(index-1);
 430             }
 431         } else if (index>this.currentLeafR) {
 432             if ('R' == this.getPageSide(index)) {
 433                 this.flipFwdToIndex(index);
 434             } else {
 435                 this.flipFwdToIndex(index+1);
 436             }
 437         }
 438
 439     } else {
 440         var i;
 441         var leafTop = 0;
 442         var h;
 443         for (i=0; i<index; i++) {
 444             h = parseInt(this.getPageHeight(i)/this.reduce);
 445             leafTop += h + this.padding;
 446         }
 447         //$('#GBcontainer').attr('scrollTop', leafTop);
 448         $('#GBcontainer').animate({scrollTop: leafTop}, 'fast');
 449     }
 450 }
 451
 452
 453
 454 // switchMode()
 455 //______________________________________________________________________________
 456 GnuBook.prototype.switchMode = function(mode) {
 457     if (mode == this.mode) return;
 458
 459     this.autoStop();
 460     this.removeSearchHilites();
 461
 462     this.mode = mode;
 463     if (1 == mode) {
 464         this.prepareOnePageView();
 465     } else {
 466         this.prepareTwoPageView();
 467     }
 468
 469 }
 470
 471 //prepareOnePageView()
 472 //______________________________________________________________________________
 473 GnuBook.prototype.prepareOnePageView = function() {
 474
 475     var startLeaf = this.displayedLeafs[0];
 476
 477     $('#GBcontainer').empty();
 478     $('#GBcontainer').css({
 479         overflowY: 'scroll',
 480         overflowX: 'auto'
 481     });
 482
 483     $("#GBcontainer").append("<div id='GBpageview'></div>");
 484     this.resizePageView();
 485     this.jumpToIndex(startLeaf);
 486     this.displayedLeafs = [];
 487     this.drawLeafsOnePage();
 488     $('#GBzoom').text(100/this.reduce);
 489 }
 490
 491 // prepareTwoPageView()
 492 //______________________________________________________________________________
 493 GnuBook.prototype.prepareTwoPageView = function() {
 494     $('#GBcontainer').empty();
 495
 496     var firstLeaf = this.displayedLeafs[0];
 497     if ('R' == this.getPageSide(firstLeaf)) {
 498         if (0 == firstLeaf) {
 499             firstLeaf++;
 500         } else {
 501             firstLeaf--;
 502         }
 503     }
 504
 505     this.currentLeafL = null;
 506     this.currentLeafR = null;
 507     this.pruneUnusedImgs();
 508
 509     this.currentLeafL = firstLeaf;
 510     this.currentLeafR = firstLeaf + 1;
 511
 512     this.calculateSpreadSize(); //sets this.twoPageW, twoPageH, and twoPageRatio
 513
 514     var middle = ($('#GBcontainer').width() >> 1);
 515     var gutter = middle+parseInt((2*this.currentLeafL - this.numLeafs)*this.twoPageEdgeW/this.numLeafs/2);
 516     var scaledWL = this.getPageWidth2UP(this.currentLeafL);
 517     var scaledWR = this.getPageWidth2UP(this.currentLeafR);
 518     var leafEdgeWidthL = parseInt( (firstLeaf/this.numLeafs)*this.twoPageEdgeW );
 519     var leafEdgeWidthR = this.twoPageEdgeW - leafEdgeWidthL;
 520
 521     //console.log('idealWidth='+idealWidth+' idealHeight='+idealHeight);
 522     //var divWidth = this.twoPageW*2+20 + this.twoPageEdgeW;
 523     var divWidth = scaledWL + scaledWR + 20 + this.twoPageEdgeW;
 524     var divHeight = this.twoPageH+20;
 525     //var divLeft = ($('#GBcontainer').width() - divWidth) >> 1;
 526     var divLeft = gutter-scaledWL-leafEdgeWidthL-10;
 527     var divTop = ($('#GBcontainer').height() - divHeight) >> 1;
 528     //console.log('divWidth='+divWidth+' divHeight='+divHeight+ ' divLeft='+divLeft+' divTop='+divTop);
 529
 530     this.twoPageDiv = document.createElement('div');
 531     $(this.twoPageDiv).attr('id', 'book_div_1').css({
 532         border: '1px solid rgb(68, 25, 17)',
 533         width:  divWidth + 'px',
 534         height: divHeight+'px',
 535         visibility: 'visible',
 536         position: 'absolute',
 537         backgroundColor: 'rgb(136, 51, 34)',
 538         left: divLeft + 'px',
 539         top: divTop+'px',
 540         MozBorderRadiusTopleft: '7px',
 541         MozBorderRadiusTopright: '7px',
 542         MozBorderRadiusBottomright: '7px',
 543         MozBorderRadiusBottomleft: '7px'
 544     }).appendTo('#GBcontainer');
 545     //$('#GBcontainer').append('<div id="book_div_1" style="border: 1px solid rgb(68, 25, 17); width: ' + divWidth + 'px; height: '+divHeight+'px; visibility: visible; position: absolute; background-color: rgb(136, 51, 34); left: ' + divLeft + 'px; top: '+divTop+'px; -moz-border-radius-topleft: 7px; -moz-border-radius-topright: 7px; -moz-border-radius-bottomright: 7px; -moz-border-radius-bottomleft: 7px;"/>');
 546
 547
 548     var height  = this.getPageHeight(this.currentLeafR);
 549     var width   = this.getPageWidth(this.currentLeafR);
 550     var scaledW = this.twoPageH*width/height;
 551
 552     this.leafEdgeR = document.createElement('div');
 553     $(this.leafEdgeR).css({
 554         borderStyle: 'solid solid solid none',
 555         borderColor: 'rgb(51, 51, 34)',
 556         borderWidth: '1px 1px 1px 0px',
 557         background: 'transparent url(http://www.us.archive.org/GnuBook/images/right-edges.png) repeat scroll 0% 0%',
 558         width: leafEdgeWidthR + 'px',
 559         height: this.twoPageH-1 + 'px',
 560         /*right: '10px',*/
 561         left: gutter+scaledW+'px',
 562         top: divTop+10+'px',
 563         position: 'absolute'
 564     }).appendTo('#GBcontainer');
 565
 566     this.leafEdgeL = document.createElement('div');
 567     $(this.leafEdgeL).css({
 568         borderStyle: 'solid none solid solid',
 569         borderColor: 'rgb(51, 51, 34)',
 570         borderWidth: '1px 0px 1px 1px',
 571         background: 'transparent url(http://www.us.archive.org/GnuBook/images/left-edges.png) repeat scroll 0% 0%',
 572         width: leafEdgeWidthL + 'px',
 573         height: this.twoPageH-1 + 'px',
 574         left: divLeft+10+'px',
 575         top: divTop+10+'px',
 576         position: 'absolute'
 577     }).appendTo('#GBcontainer');
 578
 579
 580
 581     divWidth = 30;
 582     divHeight = this.twoPageH+20;
 583     divLeft = ($('#GBcontainer').width() - divWidth) >> 1;
 584     divTop = ($('#GBcontainer').height() - divHeight) >> 1;
 585
 586     div = document.createElement('div');
 587     $(div).attr('id', 'book_div_2').css({
 588         border:          '1px solid rgb(68, 25, 17)',
 589         width:           divWidth+'px',
 590         height:          divHeight+'px',
 591         position:        'absolute',
 592         backgroundColor: 'rgb(68, 25, 17)',
 593         left:            divLeft+'px',
 594         top:             divTop+'px'
 595     }).appendTo('#GBcontainer');
 596     //$('#GBcontainer').append('<div id="book_div_2" style="border: 1px solid rgb(68, 25, 17); width: '+divWidth+'px; height: '+divHeight+'px; visibility: visible; position: absolute; background-color: rgb(68, 25, 17); left: '+divLeft+'px; top: '+divTop+'px;"/>');
 597
 598     divWidth = this.twoPageW*2;
 599     divHeight = this.twoPageH;
 600     divLeft = ($('#GBcontainer').width() - divWidth) >> 1;
 601     divTop = ($('#GBcontainer').height() - divHeight) >> 1;
 602
 603
 604     this.prepareTwoPagePopUp();
 605
 606     this.displayedLeafs = [];
 607     //this.leafsToDisplay=[firstLeaf, firstLeaf+1];
 608     //console.log('leafsToDisplay: ' + this.leafsToDisplay[0] + ' ' + this.leafsToDisplay[1]);
 609     this.drawLeafsTwoPage();
 610     this.updateSearchHilites2UP();
 611
 612     this.prefetch();
 613     $('#GBzoom').text((100*this.twoPageH/this.getPageHeight(firstLeaf)).toString().substr(0,4));
 614 }
 615
 616 // prepareTwoPagePopUp()
 617 //______________________________________________________________________________
 618 GnuBook.prototype.prepareTwoPagePopUp = function() {
 619     this.twoPagePopUp = document.createElement('div');
 620     $(this.twoPagePopUp).css({
 621         border: '1px solid black',
 622         padding: '2px 6px',
 623         position: 'absolute',
 624         fontFamily: 'sans-serif',
 625         fontSize: '14px',
 626         zIndex: '1000',
 627         backgroundColor: 'rgb(255, 255, 238)',
 628         opacity: 0.85
 629     }).appendTo('#GBcontainer');
 630     $(this.twoPagePopUp).hide();
 631
 632     $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
 633         $(e.data.twoPagePopUp).show();
 634     });
 635
 636     $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
 637         $(e.data.twoPagePopUp).hide();
 638     });
 639
 640     $(this.leafEdgeL).bind('click', this, function(e) {
 641         e.data.autoStop();
 642         var jumpIndex = e.data.currentLeafL - ($(e.data.leafEdgeL).offset().left + $(e.data.leafEdgeL).width() - e.pageX) * 10;
 643         jumpIndex = Math.max(jumpIndex, 0);
 644         e.data.flipBackToIndex(jumpIndex);
 645
 646     });
 647
 648     $(this.leafEdgeR).bind('click', this, function(e) {
 649         e.data.autoStop();
 650         var jumpIndex = e.data.currentLeafR + (e.pageX - $(e.data.leafEdgeR).offset().left) * 10;
 651         jumpIndex = Math.max(jumpIndex, 0);
 652         e.data.flipFwdToIndex(jumpIndex);
 653
 654     });
 655
 656     $(this.leafEdgeR).bind('mousemove', this, function(e) {
 657
 658         var jumpLeaf = e.data.currentLeafR + (e.pageX - $(e.data.leafEdgeR).offset().left) * 10;
 659         jumpLeaf = Math.min(jumpLeaf, e.data.numLeafs-1);
 660         $(e.data.twoPagePopUp).text('View Leaf '+jumpLeaf);
 661
 662         $(e.data.twoPagePopUp).css({
 663             left: e.pageX +5+ 'px',
 664             top: e.pageY-$('#GBcontainer').offset().top+ 'px'
 665         });
 666     });
 667
 668     $(this.leafEdgeL).bind('mousemove', this, function(e) {
 669         var jumpLeaf = e.data.currentLeafL - ($(e.data.leafEdgeL).offset().left + $(e.data.leafEdgeL).width() - e.pageX) * 10;
 670         jumpLeaf = Math.max(jumpLeaf, 0);
 671         $(e.data.twoPagePopUp).text('View Leaf '+jumpLeaf);
 672
 673         $(e.data.twoPagePopUp).css({
 674             left: e.pageX - $(e.data.twoPagePopUp).width() - 30 + 'px',
 675             top: e.pageY-$('#GBcontainer').offset().top+ 'px'
 676         });
 677     });
 678 }
 679
 680 // calculateSpreadSize()
 681 //______________________________________________________________________________
 682 // Calculates 2-page spread dimensions based on this.currentLeafL and
 683 // this.currentLeafR
 684 // This function sets this.twoPageH, twoPageW, and twoPageRatio
 685
 686 GnuBook.prototype.calculateSpreadSize = function() {
 687     var firstLeaf  = this.currentLeafL;
 688     var secondLeaf = this.currentLeafR;
 689     //console.log('first page is ' + firstLeaf);
 690
 691     var canon5Dratio = 1.5;
 692
 693     var firstLeafRatio  = this.getPageHeight(firstLeaf) / this.getPageWidth(firstLeaf);
 694     var secondLeafRatio = this.getPageHeight(secondLeaf) / this.getPageWidth(secondLeaf);
 695     //console.log('firstLeafRatio = ' + firstLeafRatio + ' secondLeafRatio = ' + secondLeafRatio);
 696
 697     var ratio;
 698     if (Math.abs(firstLeafRatio - canon5Dratio) < Math.abs(secondLeafRatio - canon5Dratio)) {
 699         ratio = firstLeafRatio;
 700         //console.log('using firstLeafRatio ' + ratio);
 701     } else {
 702         ratio = secondLeafRatio;
 703         //console.log('using secondLeafRatio ' + ratio);
 704     }
 705
 706     var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
 707     var maxLeafEdgeWidth   = parseInt($('#GBcontainer').width() * 0.1);
 708     totalLeafEdgeWidth     = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
 709
 710     $('#GBcontainer').css('overflow', 'hidden');
 711
 712     var idealWidth  = ($('#GBcontainer').width() - 30 - totalLeafEdgeWidth)>>1;
 713     var idealHeight = $('#GBcontainer').height() - 30;
 714     //console.log('init idealWidth='+idealWidth+' idealHeight='+idealHeight + ' ratio='+ratio);
 715
 716     if (idealHeight/ratio <= idealWidth) {
 717         //use height
 718         idealWidth = parseInt(idealHeight/ratio);
 719     } else {
 720         //use width
 721         idealHeight = parseInt(idealWidth*ratio);
 722     }
 723
 724     this.twoPageH     = idealHeight;
 725     this.twoPageW     = idealWidth;
 726     this.twoPageRatio = ratio;
 727     this.twoPageEdgeW = totalLeafEdgeWidth;
 728
 729 }
 730
 731 // next()
 732 //______________________________________________________________________________
 733 GnuBook.prototype.next = function() {
 734     if (2 == this.mode) {
 735         this.autoStop();
 736         this.flipFwdToIndex(null);
 737     } else {
 738         if (this.firstIndex <= (this.numLeafs - 2)) {
 739             this.jumpToIndex(this.firstIndex+1);
 740         }
 741     }
 742 }
 743
 744 // prev()
 745 //______________________________________________________________________________
 746 GnuBook.prototype.prev = function() {
 747     if (2 == this.mode) {
 748         this.autoStop();
 749         this.flipBackToIndex(null);
 750     } else {
 751         if (this.firstIndex >= 1) {
 752             this.jumpToIndex(this.firstIndex-1);
 753         }
 754     }
 755 }
 756
 757
 758 // flipBackToIndex()
 759 //______________________________________________________________________________
 760 // to flip back one spread, pass index=null
 761 GnuBook.prototype.flipBackToIndex = function(index) {
 762     if (1 == this.mode) return;
 763
 764     var leftIndex = this.currentLeafL;
 765     if (leftIndex <= 2) return;
 766     if (this.animating) return;
 767
 768     if (null != this.leafEdgeTmp) {
 769         alert('error: leafEdgeTmp should be null!');
 770         return;
 771     }
 772
 773     if (null == index) {
 774         index = leftIndex-2;
 775     }
 776     if (index<0) return;
 777
 778     if ('L' !=  this.getPageSide(index)) {
 779         alert('img with index ' + index + ' is not a left-hand page');
 780         return;
 781     }
 782
 783     this.animating = true;
 784
 785     var prevL = index;
 786     var prevR = index+1;
 787
 788     var gutter= this.prepareFlipBack(prevL, prevR);
 789
 790     var leftLeaf = this.currentLeafL;
 791
 792     var oldLeafEdgeWidthL = parseInt( (this.currentLeafL/this.numLeafs)*this.twoPageEdgeW );
 793     var newLeafEdgeWidthL = parseInt( (index            /this.numLeafs)*this.twoPageEdgeW );
 794     var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
 795
 796     var scaledWL = this.getPageWidth2UP(prevL);
 797
 798     var top  = ($('#GBcontainer').height() - this.twoPageH) >> 1;
 799
 800     this.leafEdgeTmp = document.createElement('div');
 801     $(this.leafEdgeTmp).css({
 802         borderStyle: 'solid none solid solid',
 803         borderColor: 'rgb(51, 51, 34)',
 804         borderWidth: '1px 0px 1px 1px',
 805         background: 'transparent url(http://www.us.archive.org/GnuBook/images/left-edges.png) repeat scroll 0% 0%',
 806         width: leafEdgeTmpW + 'px',
 807         height: this.twoPageH-1 + 'px',
 808         left: gutter-scaledWL+10+newLeafEdgeWidthL+'px',
 809         top: top+'px',
 810         position: 'absolute',
 811         zIndex:1000
 812     }).appendTo('#GBcontainer');
 813
 814     //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
 815     $(this.leafEdgeL).css({
 816         width: newLeafEdgeWidthL+'px',
 817         left: gutter-scaledWL-newLeafEdgeWidthL+'px'
 818     });
 819
 820     var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
 821     var right = $('#GBcontainer').width()-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#GBcontainer').offset().left-2+'px';
 822     $(this.prefetchedImgs[leftLeaf]).css({
 823         right: right,
 824         left: null
 825     });
 826
 827      left = $(this.prefetchedImgs[leftLeaf]).offset().left - $('#book_div_1').offset().left;
 828      right = left+$(this.prefetchedImgs[leftLeaf]).width()+'px';
 829
 830     $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
 831     //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
 832
 833     var scaledWR = this.getPageWidth2UP(prevR);
 834
 835     var self = this;
 836
 837     this.removeSearchHilites();
 838
 839     $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
 840         $(self.leafEdgeTmp).animate({left: gutter+scaledWR+'px'}, self.flipSpeed, 'easeOutSine');
 841         $(self.prefetchedImgs[prevR]).animate({width: scaledWR+'px'}, self.flipSpeed, 'easeOutSine', function() {
 842             $(self.prefetchedImgs[prevL]).css('zIndex', 2);
 843
 844             $(self.leafEdgeR).css({
 845                 width: self.twoPageEdgeW-newLeafEdgeWidthL+'px',
 846                 left:  gutter+scaledWR+'px'
 847             });
 848
 849             $(self.twoPageDiv).css({
 850                 width: scaledWL+scaledWR+self.twoPageEdgeW+20+'px',
 851                 left: gutter-scaledWL-newLeafEdgeWidthL-10+'px'
 852             });
 853
 854             $(self.leafEdgeTmp).remove();
 855             self.leafEdgeTmp = null;
 856
 857             self.currentLeafL = prevL;
 858             self.currentLeafR = prevR;
 859             self.displayedLeafs = [prevL, prevR];
 860             self.setClickHandlers();
 861             self.pruneUnusedImgs();
 862             self.prefetch();
 863             self.animating = false;
 864
 865             self.updateSearchHilites2UP();
 866             self.updatePageNumBox2UP();
 867             //$('#GBzoom').text((self.twoPageH/self.getPageHeight(prevL)).toString().substr(0,4));
 868         });
 869     });
 870
 871 }
 872
 873 // flipFwdToIndex()
 874 //______________________________________________________________________________
 875 // to flip forward one spread, pass index=null
 876 GnuBook.prototype.flipFwdToIndex = function(index) {
 877     var rightLeaf = this.currentLeafR;
 878     if (rightLeaf >= this.numLeafs-3) return;
 879
 880     if (this.animating) return;
 881
 882     if (null != this.leafEdgeTmp) {
 883         alert('error: leafEdgeTmp should be null!');
 884         return;
 885     }
 886
 887
 888     if (null == index) {
 889         index = rightLeaf+2;
 890     }
 891     if (index>=this.numLeafs-3) return;
 892
 893     if ('R' !=  this.getPageSide(index)) {
 894         alert('img with index ' + index + ' is not a right-hand page');
 895         return;
 896     }
 897
 898     this.animating = true;
 899
 900     var nextL = index-1;
 901     var nextR = index;
 902
 903     var gutter= this.prepareFlipFwd(nextL, nextR);
 904
 905     var oldLeafEdgeWidthL = parseInt( (this.currentLeafL/this.numLeafs)*this.twoPageEdgeW );
 906     var oldLeafEdgeWidthR = this.twoPageEdgeW-oldLeafEdgeWidthL;
 907     var newLeafEdgeWidthL = parseInt( (nextL            /this.numLeafs)*this.twoPageEdgeW );
 908     var newLeafEdgeWidthR = this.twoPageEdgeW-newLeafEdgeWidthL;
 909
 910     var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
 911
 912     var top  = ($('#GBcontainer').height() - this.twoPageH) >> 1;
 913
 914     var height  = this.getPageHeight(rightLeaf);
 915     var width   = this.getPageWidth(rightLeaf);
 916     var scaledW = this.twoPageH*width/height;
 917
 918     var middle     = ($('#GBcontainer').width() >> 1);
 919     var currGutter = middle+parseInt((2*this.currentLeafL - this.numLeafs)*this.twoPageEdgeW/this.numLeafs/2);
 920
 921     this.leafEdgeTmp = document.createElement('div');
 922     $(this.leafEdgeTmp).css({
 923         borderStyle: 'solid none solid solid',
 924         borderColor: 'rgb(51, 51, 34)',
 925         borderWidth: '1px 0px 1px 1px',
 926         background: 'transparent url(http://www.us.archive.org/GnuBook/images/left-edges.png) repeat scroll 0% 0%',
 927         width: leafEdgeTmpW + 'px',
 928         height: this.twoPageH-1 + 'px',
 929         left: currGutter+scaledW+'px',
 930         top: top+'px',
 931         position: 'absolute',
 932         zIndex:1000
 933     }).appendTo('#GBcontainer');
 934
 935     var scaledWR = this.getPageWidth2UP(nextR);
 936     $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+scaledWR+'px' });
 937
 938     var scaledWL = this.getPageWidth2UP(nextL);
 939
 940     var self = this;
 941
 942     var speed = this.flipSpeed;
 943
 944     this.removeSearchHilites();
 945
 946     $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
 947     $(this.prefetchedImgs[rightLeaf]).animate({width: '0px'}, speed, 'easeInSine', function() {
 948         $(self.leafEdgeTmp).animate({left: gutter-scaledWL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
 949         $(self.prefetchedImgs[nextL]).animate({width: scaledWL+'px'}, speed, 'easeOutSine', function() {
 950             $(self.prefetchedImgs[nextR]).css('zIndex', 2);
 951
 952             $(self.leafEdgeL).css({
 953                 width: newLeafEdgeWidthL+'px',
 954                 left: gutter-scaledWL-newLeafEdgeWidthL+'px'
 955             });
 956
 957             $(self.twoPageDiv).css({
 958                 width: scaledWL+scaledWR+self.twoPageEdgeW+20+'px',
 959                 left: gutter-scaledWL-newLeafEdgeWidthL-10+'px'
 960             });
 961
 962             $(self.leafEdgeTmp).remove();
 963             self.leafEdgeTmp = null;
 964
 965             self.currentLeafL = nextL;
 966             self.currentLeafR = nextR;
 967             self.displayedLeafs = [nextL, nextR];
 968             self.setClickHandlers();
 969             self.pruneUnusedImgs();
 970             self.prefetch();
 971             self.animating = false;
 972
 973             self.updateSearchHilites2UP();
 974             self.updatePageNumBox2UP();
 975             //$('#GBzoom').text((self.twoPageH/self.getPageHeight(nextL)).toString().substr(0,4));
 976         });
 977     });
 978
 979 }
 980
 981 // setClickHandlers
 982 //______________________________________________________________________________
 983 GnuBook.prototype.setClickHandlers = function() {
 984     var self = this;
 985     $(this.prefetchedImgs[this.currentLeafL]).click(function() {
 986         //self.prevPage();
 987         self.autoStop();
 988         self.flipBackToIndex(null);
 989     });
 990     $(this.prefetchedImgs[this.currentLeafR]).click(function() {
 991         //self.nextPage();'
 992         self.autoStop();
 993         self.flipFwdToIndex(null);
 994     });
 995 }
 996
 997 // prefetchImg()
 998 //______________________________________________________________________________
 999 GnuBook.prototype.prefetchImg = function(leafNum) {
1000     if (undefined == this.prefetchedImgs[leafNum]) {
1001         var img = document.createElement("img");
1002         img.src = this.getPageURI(leafNum);
1003         this.prefetchedImgs[leafNum] = img;
1004     }
1005 }
1006
1007
1008 // prepareFlipBack()
1009 //______________________________________________________________________________
1010 GnuBook.prototype.prepareFlipBack = function(prevL, prevR) {
1011
1012     this.prefetchImg(prevL);
1013     this.prefetchImg(prevR);
1014
1015     var height  = this.getPageHeight(prevL);
1016     var width   = this.getPageWidth(prevL);
1017     var middle = ($('#GBcontainer').width() >> 1);
1018     var top  = ($('#GBcontainer').height() - this.twoPageH) >> 1;
1019     var scaledW = this.twoPageH*width/height;
1020
1021     var gutter = middle+parseInt((2*prevL - this.numLeafs)*this.twoPageEdgeW/this.numLeafs/2);
1022
1023     $(this.prefetchedImgs[prevL]).css({
1024         position: 'absolute',
1025         /*right:   middle+'px',*/
1026         left: gutter-scaledW+'px',
1027         top:    top+'px',
1028         backgroundColor: 'rgb(234, 226, 205)',
1029         height: this.twoPageH,
1030         width:  scaledW+'px',
1031         borderRight: '1px solid black',
1032         zIndex: 1
1033     });
1034
1035     $('#GBcontainer').append(this.prefetchedImgs[prevL]);
1036
1037     $(this.prefetchedImgs[prevR]).css({
1038         position: 'absolute',
1039         left:   gutter+'px',
1040         top:    top+'px',
1041         backgroundColor: 'rgb(234, 226, 205)',
1042         height: this.twoPageH,
1043         width:  '0px',
1044         borderLeft: '1px solid black',
1045         zIndex: 2
1046     });
1047
1048     $('#GBcontainer').append(this.prefetchedImgs[prevR]);
1049
1050
1051     return gutter;
1052
1053 }
1054
1055 // prepareFlipFwd()
1056 //______________________________________________________________________________
1057 GnuBook.prototype.prepareFlipFwd = function(nextL, nextR) {
1058
1059     this.prefetchImg(nextL);
1060     this.prefetchImg(nextR);
1061
1062     var height  = this.getPageHeight(nextR);
1063     var width   = this.getPageWidth(nextR);
1064     var middle = ($('#GBcontainer').width() >> 1);
1065     var top  = ($('#GBcontainer').height() - this.twoPageH) >> 1;
1066     var scaledW = this.twoPageH*width/height;
1067
1068     var gutter = middle+parseInt((2*nextL - this.numLeafs)*this.twoPageEdgeW/this.numLeafs/2);
1069
1070     $(this.prefetchedImgs[nextR]).css({
1071         position: 'absolute',
1072         left:   gutter+'px',
1073         top:    top+'px',
1074         backgroundColor: 'rgb(234, 226, 205)',
1075         height: this.twoPageH,
1076         width:  scaledW+'px',
1077         borderLeft: '1px solid black',
1078         zIndex: 1
1079     });
1080
1081     $('#GBcontainer').append(this.prefetchedImgs[nextR]);
1082
1083     height  = this.getPageHeight(nextL);
1084     width   = this.getPageWidth(nextL);
1085     scaledW = this.twoPageH*width/height;
1086
1087     $(this.prefetchedImgs[nextL]).css({
1088         position: 'absolute',
1089         right:   $('#GBcontainer').width()-gutter+'px',
1090         top:    top+'px',
1091         backgroundColor: 'rgb(234, 226, 205)',
1092         height: this.twoPageH,
1093         width:  0+'px',
1094         borderRight: '1px solid black',
1095         zIndex: 2
1096     });
1097
1098     $('#GBcontainer').append(this.prefetchedImgs[nextL]);
1099
1100     return gutter;
1101
1102 }
1103
1104 // getNextLeafs()
1105 //______________________________________________________________________________
1106 GnuBook.prototype.getNextLeafs = function(o) {
1107     //TODO: we might have two left or two right leafs in a row (damaged book)
1108     //For now, assume that leafs are contiguous.
1109
1110     //return [this.currentLeafL+2, this.currentLeafL+3];
1111     o.L = this.currentLeafL+2;
1112     o.R = this.currentLeafL+3;
1113 }
1114
1115 // getprevLeafs()
1116 //______________________________________________________________________________
1117 GnuBook.prototype.getPrevLeafs = function(o) {
1118     //TODO: we might have two left or two right leafs in a row (damaged book)
1119     //For now, assume that leafs are contiguous.
1120
1121     //return [this.currentLeafL-2, this.currentLeafL-1];
1122     o.L = this.currentLeafL-2;
1123     o.R = this.currentLeafL-1;
1124 }
1125
1126 // pruneUnusedImgs()
1127 //______________________________________________________________________________
1128 GnuBook.prototype.pruneUnusedImgs = function() {
1129     //console.log('current: ' + this.currentLeafL + ' ' + this.currentLeafR);
1130     for (var key in this.prefetchedImgs) {
1131         //console.log('key is ' + key);
1132         if ((key != this.currentLeafL) && (key != this.currentLeafR)) {
1133             //console.log('removing key '+ key);
1134             $(this.prefetchedImgs[key]).remove();
1135         }
1136         if ((key < this.currentLeafL-4) || (key > this.currentLeafR+4)) {
1137             //console.log('deleting key '+ key);
1138             delete this.prefetchedImgs[key];
1139         }
1140     }
1141 }
1142
1143 // prefetch()
1144 //______________________________________________________________________________
1145 GnuBook.prototype.prefetch = function() {
1146     var lim = this.currentLeafL-4;
1147     var i;
1148     lim = Math.max(lim, 0);
1149     for (i = lim; i < this.currentLeafL; i++) {
1150         this.prefetchImg(i);
1151     }
1152
1153     if (this.numLeafs > (this.currentLeafR+1)) {
1154         lim = Math.min(this.currentLeafR+4, this.numLeafs-1);
1155         for (i=this.currentLeafR+1; i<=lim; i++) {
1156             this.prefetchImg(i);
1157         }
1158     }
1159 }
1160
1161 // getPageWidth2UP()
1162 //______________________________________________________________________________
1163 GnuBook.prototype.getPageWidth2UP = function(index) {
1164     var height  = this.getPageHeight(index);
1165     var width   = this.getPageWidth(index);
1166     return Math.floor(this.twoPageH*width/height);
1167 }
1168
1169 // search()
1170 //______________________________________________________________________________
1171 GnuBook.prototype.search = function(term) {
1172     $('#GnuBookSearchScript').remove();
1173         var script  = document.createElement("script");
1174         script.setAttribute('id', 'GnuBookSearchScript');
1175         script.setAttribute("type", "text/javascript");
1176         script.setAttribute("src", 'http://'+this.server+'/GnuBook/flipbook_search_gb.php?url='+escape(this.bookPath+'/'+this.bookId+'_djvu.xml')+'&term='+term+'&format=XML&callback=gb.GBSearchCallback');
1177         document.getElementsByTagName('head')[0].appendChild(script);
1178 }
1179
1180 // GBSearchCallback()
1181 //______________________________________________________________________________
1182 GnuBook.prototype.GBSearchCallback = function(txt) {
1183     //alert(txt);
1184     if (jQuery.browser.msie) {
1185         var dom=new ActiveXObject("Microsoft.XMLDOM");
1186         dom.async="false";
1187         dom.loadXML(txt);
1188     } else {
1189         var parser = new DOMParser();
1190         var dom = parser.parseFromString(txt, "text/xml");
1191     }
1192
1193     $('#GnuBookSearchResults').empty();
1194     $('#GnuBookSearchResults').append('<ul>');
1195
1196     for (var key in this.searchResults) {
1197         if (null != this.searchResults[key].div) {
1198             $(this.searchResults[key].div).remove();
1199         }
1200         delete this.searchResults[key];
1201     }
1202
1203     var pages = dom.getElementsByTagName('PAGE');
1204     for (var i = 0; i < pages.length; i++){
1205         //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
1206
1207
1208         var re = new RegExp (/_(\d{4})/);
1209         var reMatch = re.exec(pages[i].getAttribute('file'));
1210         var leafNum = parseInt(reMatch[1], 10);
1211         //var leafNum = parseInt(pages[i].getAttribute('file').substr(1), 10);
1212
1213         var children = pages[i].childNodes;
1214         var context = '';
1215         for (var j=0; j<children.length; j++) {
1216             //console.log(j + ' - ' + children[j].nodeName);
1217             //console.log(children[j].firstChild.nodeValue);
1218             if ('CONTEXT' == children[j].nodeName) {
1219                 context += children[j].firstChild.nodeValue;
1220             } else if ('WORD' == children[j].nodeName) {
1221                 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
1222
1223                 var index = this.leafNumToIndex(leafNum);
1224                 if (null != index) {
1225                     //coordinates are [left, bottom, right, top, [baseline]]
1226                     //we'll skip baseline for now...
1227                     var coords = children[j].getAttribute('coords').split(',',4);
1228                     if (4 == coords.length) {
1229                         this.searchResults[index] = {'l':coords[0], 'b':coords[1], 'r':coords[2], 't':coords[3], 'div':null};
1230                     }
1231                 }
1232             }
1233         }
1234         //TODO: remove hardcoded instance name
1235         $('#GnuBookSearchResults').append('<li><b><a href="javascript:gb.jumpToIndex('+index+');">Leaf ' + leafNum + '</a></b> - ' + context+'</li>');
1236     }
1237     $('#GnuBookSearchResults').append('</ul>');
1238
1239     this.updateSearchHilites();
1240 }
1241
1242 // updateSearchHilites()
1243 //______________________________________________________________________________
1244 GnuBook.prototype.updateSearchHilites = function() {
1245     if (2 == this.mode) {
1246         this.updateSearchHilites2UP();
1247     } else {
1248         this.updateSearchHilites1UP();
1249     }
1250 }
1251
1252 // showSearchHilites1UP()
1253 //______________________________________________________________________________
1254 GnuBook.prototype.updateSearchHilites1UP = function() {
1255
1256     for (var key in this.searchResults) {
1257
1258         if (-1 != jQuery.inArray(parseInt(key), this.displayedLeafs)) {
1259             var result = this.searchResults[key];
1260             if(null == result.div) {
1261                 result.div = document.createElement('div');
1262                 $(result.div).attr('className', 'GnuBookSearchHilite').appendTo('#pagediv'+key);
1263                 //console.log('appending ' + key);
1264             }
1265             $(result.div).css({
1266                 width:  (result.r-result.l)/this.reduce + 'px',
1267                 height: (result.b-result.t)/this.reduce + 'px',
1268                 left:   (result.l)/this.reduce + 'px',
1269                 top:    (result.t)/this.reduce +'px'
1270             });
1271
1272         } else {
1273             //console.log(key + ' not displayed');
1274             this.searchResults[key].div=null;
1275         }
1276     }
1277 }
1278
1279 // showSearchHilites2UP()
1280 //______________________________________________________________________________
1281 GnuBook.prototype.updateSearchHilites2UP = function() {
1282
1283     var middle = ($('#GBcontainer').width() >> 1);
1284
1285     for (var key in this.searchResults) {
1286         key = parseInt(key, 10);
1287         if (-1 != jQuery.inArray(key, this.displayedLeafs)) {
1288             var result = this.searchResults[key];
1289             if(null == result.div) {
1290                 result.div = document.createElement('div');
1291                 $(result.div).attr('className', 'GnuBookSearchHilite').css('zIndex', 3).appendTo('#GBcontainer');
1292                 //console.log('appending ' + key);
1293             }
1294
1295             var height = this.getPageHeight(key);
1296             var width  = this.getPageWidth(key)
1297             var reduce = this.twoPageH/height;
1298             var scaledW = parseInt(width*reduce);
1299
1300             var gutter = middle+parseInt((2*this.currentLeafL - this.numLeafs)*this.twoPageEdgeW/this.numLeafs/2);
1301
1302             if ('L' == this.getPageSide(key)) {
1303                 var pageL = gutter-scaledW;
1304             } else {
1305                 var pageL = gutter;
1306             }
1307             var pageT  = ($('#GBcontainer').height() - this.twoPageH) >> 1;
1308
1309             $(result.div).css({
1310                 width:  (result.r-result.l)*reduce + 'px',
1311                 height: (result.b-result.t)*reduce + 'px',
1312                 left:   pageL+(result.l)*reduce + 'px',
1313                 top:    pageT+(result.t)*reduce +'px'
1314             });
1315
1316         } else {
1317             //console.log(key + ' not displayed');
1318             if (null != this.searchResults[key].div) {
1319                 //console.log('removing ' + key);
1320                 $(this.searchResults[key].div).remove();
1321             }
1322             this.searchResults[key].div=null;
1323         }
1324     }
1325 }
1326
1327 // removeSearchHilites()
1328 //______________________________________________________________________________
1329 GnuBook.prototype.removeSearchHilites = function() {
1330     for (var key in this.searchResults) {
1331         if (null != this.searchResults[key].div) {
1332             $(this.searchResults[key].div).remove();
1333             this.searchResults[key].div=null;
1334         }
1335     }
1336 }
1337
1338 // showEmbedCode()
1339 //______________________________________________________________________________
1340 GnuBook.prototype.showEmbedCode = function() {
1341     this.autoStop();
1342     var overlay = document.createElement("div");
1343     $(overlay).css({
1344         position: 'absolute',
1345         top:      '20px',
1346         left:     ($('#GBcontainer').width()-400)/2 + 'px',
1347         width:    '400px',
1348         padding:  "20px",
1349         border:   "3px double #999999",
1350         zIndex:   3,
1351         backgroundColor: "#fff",
1352     }).appendTo('#GnuBook');
1353
1354     htmlStr =  '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
1355     htmlStr += '<p><b>Note:</b> The bookreader is still in beta testing. URLs may change in the future, breaking embedded books. This feature is just for testing!</b></p>';
1356     htmlStr += '<p>The bookreader uses iframes for embedding. It will not work on web hosts that block iframes. The embed feature has been tested on blogspot.com blogs as well as self-hosted Wordpress blogs. This feature will NOT work on wordpress.com blogs.</p>';
1357     htmlStr += '<p>Embed Code: <input type="text" size="40" value="<iframe src=\'http://www.us.archive.org/GnuBook/GnuBookEmbed.php?id='+this.bookId+'\' width=\'430px\' height=\'430px\'></iframe>"></p>';
1358     htmlStr += '<p style="text-align:center;"><a href="" onclick="$(this.parentNode.parentNode).remove(); return false;">Close popup</a></p>';
1359
1360     overlay.innerHTML = htmlStr;
1361 }
1362
1363 // autoToggle()
1364 //______________________________________________________________________________
1365 GnuBook.prototype.autoToggle = function() {
1366     if (2 != this.mode) {
1367         this.switchMode(2);
1368     }
1369
1370     var self = this;
1371     if (null == this.autoTimer) {
1372         this.flipSpeed = 2000;
1373         this.flipFwdToIndex();
1374
1375         $('#autoImg').attr('src', 'http://www.us.archive.org/GnuBook/images/control_pause_blue.png');
1376         this.autoTimer=setInterval(function(){
1377             if (self.animating) {return;}
1378
1379             if (self.currentLeafR >= self.numLeafs-5) {
1380                 self.flipBackToIndex(1);
1381             } else {
1382                 self.flipFwdToIndex();
1383             }
1384         },5000);
1385     } else {
1386         this.autoStop();
1387     }
1388 }
1389
1390 // autoStop()
1391 //______________________________________________________________________________
1392 GnuBook.prototype.autoStop = function() {
1393     if (null != this.autoTimer) {
1394         clearInterval(this.autoTimer);
1395         this.flipSpeed = 'fast';
1396         $('#autoImg').attr('src', 'http://www.us.archive.org/GnuBook/images/control_play_blue.png');
1397         this.autoTimer = null;
1398     }
1399 }