2 Copyright(c)2008-2009 Internet Archive. Software license AGPL version 3.
4 This file is part of BookReader.
6 BookReader 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.
11 BookReader 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.
16 You should have received a copy of the GNU Affero General Public License
17 along with BookReader. If not, see <http://www.gnu.org/licenses/>.
19 The BookReader source is hosted at http://github.com/openlibrary/bookreader/
21 archive.org cvs $Revision: 1.2 $ $Date: 2009-06-22 18:42:51 $
25 //______________________________________________________________________________
26 // After you instantiate this object, you must supply the following
27 // book-specific functions, before calling init(). Some of these functions
28 // can just be stubs for simple books.
35 // - getSpreadIndices()
36 // You must also add a numLeafs property before calling init().
38 function BookReader() {
41 this.mode = 1; //1, 2, 3
42 this.ui = 'full'; // UI mode
45 this.thumbWidth = 100; // will be overridden during prepareThumbnailView
46 this.thumbRowBuffer = 2; // number of rows to pre-cache out a view
47 this.thumbColumns = 6; // default
48 this.thumbMaxLoading = 4; // number of thumbnails to load at once
49 this.displayedRows=[];
51 this.displayedIndices = [];
52 //this.indicesToDisplay = [];
54 this.prefetchedImgs = {}; //an object with numeric keys cooresponding to page index
57 this.animating = false;
59 this.autoTimer = null;
60 this.flipSpeed = 'fast';
62 this.twoPagePopUp = null;
63 this.leafEdgeTmp = null;
64 this.embedPopup = null;
65 this.printPopup = null;
68 this.searchResults = {};
70 this.firstIndex = null;
72 this.lastDisplayableIndex2up = null;
74 // We link to index.php to avoid redirect which breaks back button
75 this.logoURL = 'http://www.archive.org/index.php';
77 // Base URL for images
78 this.imagesBaseURL = '/bookreader/images/';
81 this.constMode1up = 1;
82 this.constMode2up = 2;
83 this.constModeThumb = 3;
86 // $$$ provide finer grained zooming
87 this.reductionFactors = [ {reduce: 0.5, autofit: null},
88 {reduce: 1, autofit: null},
89 {reduce: 2, autofit: null},
90 {reduce: 4, autofit: null},
91 {reduce: 8, autofit: null},
92 {reduce: 16, autofit: null} ];
94 // Object to hold parameters related to 1up mode
96 autofit: 'height' // valid values are height, width, none
99 // Object to hold parameters related to 2up mode
101 coverInternalPadding: 10, // Width of cover
102 coverExternalPadding: 10, // Padding outside of cover
103 bookSpineDivWidth: 30, // Width of book spine $$$ consider sizing based on book length
107 // Background color for pages (e.g. when loading page image)
108 // $$$ TODO dynamically calculate based on page images
109 this.pageDefaultBackgroundColor = 'rgb(234, 226, 205)';
115 //______________________________________________________________________________
116 BookReader.prototype.init = function() {
118 var startIndex = undefined;
119 this.pageScale = this.reduce; // preserve current reduce
121 // Find start index and mode if set in location hash
122 var params = this.paramsFromFragment(window.location.hash);
124 if ('undefined' != typeof(params.index)) {
125 startIndex = params.index;
126 } else if ('undefined' != typeof(params.page)) {
127 startIndex = this.getPageIndex(params.page);
130 if ('undefined' == typeof(startIndex)) {
131 if ('undefined' != typeof(this.titleLeaf)) {
132 startIndex = this.leafNumToIndex(this.titleLeaf);
136 if ('undefined' == typeof(startIndex)) {
140 if ('undefined' != typeof(params.mode)) {
141 this.mode = params.mode;
144 // Set document title -- may have already been set in enclosing html for
145 // search engine visibility
146 document.title = this.shortTitle(50);
148 // Sanitize parameters
149 if ( !this.canSwitchToMode( this.mode ) ) {
150 this.mode = this.constMode1up;
153 $("#BookReader").empty();
155 this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
156 $("#BookReader").append("<div id='BRcontainer'></div>");
157 $("#BRcontainer").append("<div id='BRpageview'></div>");
159 $("#BRcontainer").bind('scroll', this, function(e) {
163 this.setupKeyListeners();
164 this.startLocationPolling();
166 $(window).bind('resize', this, function(e) {
167 //console.log('resize!');
168 if (1 == e.data.mode) {
169 //console.log('centering 1page view');
170 if (e.data.autofit) {
171 e.data.resizePageView();
173 e.data.centerPageView();
174 $('#BRpageview').empty()
175 e.data.displayedIndices = [];
176 e.data.updateSearchHilites(); //deletes hilights but does not call remove()
178 } else if (3 == e.data.mode){
179 e.data.prepareThumbnailView();
181 //console.log('drawing 2 page view');
183 // We only need to prepare again in autofit (size of spread changes)
184 if (e.data.twoPage.autofit) {
185 e.data.prepareTwoPageView();
187 // Re-center if the scrollbars have disappeared
188 var center = e.data.twoPageGetViewCenter();
189 var doRecenter = false;
190 if (e.data.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
191 center.percentageX = 0.5;
194 if (e.data.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
195 center.percentageY = 0.5;
199 e.data.twoPageCenterView(center.percentageX, center.percentageY);
205 $('.BRpagediv1up').bind('mousedown', this, function(e) {
206 // $$$ the purpose of this is to disable selection of the image (makes it turn blue)
207 // but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
211 // $$$ refactor this so it's enough to set the first index and call preparePageView
212 // (get rid of mode-specific logic at this point)
213 if (1 == this.mode) {
214 this.firstIndex = startIndex;
215 this.prepareOnePageView();
216 this.jumpToIndex(startIndex);
217 } else if (3 == this.mode) {
218 this.firstIndex = startIndex;
219 this.prepareThumbnailView();
220 this.jumpToIndex(startIndex);
222 //this.resizePageView();
224 this.displayedIndices=[0];
225 this.firstIndex = startIndex;
226 this.displayedIndices = [this.firstIndex];
227 //console.log('titleLeaf: %d', this.titleLeaf);
228 //console.log('displayedIndices: %s', this.displayedIndices);
229 this.prepareTwoPageView();
232 // Enact other parts of initial params
233 this.updateFromParams(params);
236 BookReader.prototype.setupKeyListeners = function() {
249 // We use document here instead of window to avoid a bug in jQuery on IE7
250 $(document).keydown(function(e) {
252 // Keyboard navigation
253 if (!self.keyboardNavigationIsDisabled(e)) {
257 // In 1up mode page scrolling is handled by browser
258 if (2 == self.mode) {
265 if (2 == self.mode) {
279 if (2 == self.mode) {
285 if (2 == self.mode) {
296 //______________________________________________________________________________
297 BookReader.prototype.drawLeafs = function() {
298 if (1 == this.mode) {
299 this.drawLeafsOnePage();
300 } else if (3 == this.mode) {
301 this.drawLeafsThumbnail();
303 this.drawLeafsTwoPage();
308 // bindGestures(jElement)
309 //______________________________________________________________________________
310 BookReader.prototype.bindGestures = function(jElement) {
312 jElement.unbind('gesturechange').bind('gesturechange', function(e) {
314 if (e.originalEvent.scale > 1.5) {
316 } else if (e.originalEvent.scale < 0.6) {
323 BookReader.prototype.setClickHandler2UP = function( element, data, handler) {
324 //console.log('setting handler');
325 //console.log(element.tagName);
327 $(element).unbind('tap').bind('tap', data, function(e) {
332 // drawLeafsOnePage()
333 //______________________________________________________________________________
334 BookReader.prototype.drawLeafsOnePage = function() {
335 //alert('drawing leafs!');
339 var scrollTop = $('#BRcontainer').attr('scrollTop');
340 var scrollBottom = scrollTop + $('#BRcontainer').height();
341 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
343 var indicesToDisplay = [];
348 for (i=0; i<this.numLeafs; i++) {
349 var height = parseInt(this._getPageHeight(i)/this.reduce);
351 leafBottom += height;
352 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
353 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
354 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
355 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
356 if (topInView | bottomInView | middleInView) {
357 //console.log('displayed: ' + this.displayedIndices);
358 //console.log('to display: ' + i);
359 indicesToDisplay.push(i);
361 leafTop += height +10;
365 var firstIndexToDraw = indicesToDisplay[0];
366 this.firstIndex = firstIndexToDraw;
368 // Update hash, but only if we're currently displaying a leaf
369 // Hack that fixes #365790
370 if (this.displayedIndices.length > 0) {
371 this.updateLocationHash();
374 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
376 indicesToDisplay.unshift(firstIndexToDraw);
379 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
380 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
381 indicesToDisplay.push(lastIndexToDraw+1);
386 for (i=0; i<firstIndexToDraw; i++) {
387 leafTop += parseInt(this._getPageHeight(i)/this.reduce) +10;
390 //var viewWidth = $('#BRpageview').width(); //includes scroll bar width
391 var viewWidth = $('#BRcontainer').attr('scrollWidth');
394 for (i=0; i<indicesToDisplay.length; i++) {
395 var index = indicesToDisplay[i];
396 var height = parseInt(this._getPageHeight(index)/this.reduce);
398 if (BookReader.util.notInArray(indicesToDisplay[i], this.displayedIndices)) {
399 var width = parseInt(this._getPageWidth(index)/this.reduce);
400 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
401 var div = document.createElement("div");
402 div.className = 'BRpagediv1up';
403 div.id = 'pagediv'+index;
404 div.style.position = "absolute";
405 $(div).css('top', leafTop + 'px');
406 var left = (viewWidth-width)>>1;
407 if (left<0) left = 0;
408 $(div).css('left', left+'px');
409 $(div).css('width', width+'px');
410 $(div).css('height', height+'px');
411 //$(div).text('loading...');
413 $('#BRpageview').append(div);
415 var img = document.createElement("img");
416 img.src = this._getPageURI(index, this.reduce, 0);
417 $(img).css('width', width+'px');
418 $(img).css('height', height+'px');
422 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
425 leafTop += height +10;
429 for (i=0; i<this.displayedIndices.length; i++) {
430 if (BookReader.util.notInArray(this.displayedIndices[i], indicesToDisplay)) {
431 var index = this.displayedIndices[i];
432 //console.log('Removing leaf ' + index);
433 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
434 $('#pagediv'+index).remove();
436 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
440 this.displayedIndices = indicesToDisplay.slice();
441 this.updateSearchHilites();
443 if (null != this.getPageNum(firstIndexToDraw)) {
444 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
446 $("#BRpagenum").val('');
449 this.updateToolbarZoom(this.reduce);
453 // drawLeafsThumbnail()
454 //______________________________________________________________________________
455 // If seekIndex is defined, the view will be drawn with that page visible (without any
456 // animated scrolling)
457 BookReader.prototype.drawLeafsThumbnail = function( seekIndex ) {
458 //alert('drawing leafs!');
461 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
463 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
477 // Will be set to top of requested seek index, if set
480 // Calculate the position of every thumbnail. $$$ cache instead of calculating on every draw
481 for (i=0; i<this.numLeafs; i++) {
482 leafWidth = this.thumbWidth;
483 if (rightPos + (leafWidth + this.padding) > viewWidth){
489 if (leafMap[currentRow]===undefined) { leafMap[currentRow] = {}; }
490 if (leafMap[currentRow].leafs===undefined) {
491 leafMap[currentRow].leafs = [];
492 leafMap[currentRow].height = 0;
493 leafMap[currentRow].top = 0;
495 leafMap[currentRow].leafs[leafIndex] = {};
496 leafMap[currentRow].leafs[leafIndex].num = i;
497 leafMap[currentRow].leafs[leafIndex].left = rightPos;
499 leafHeight = parseInt((this.getPageHeight(leafMap[currentRow].leafs[leafIndex].num)*this.thumbWidth)/this.getPageWidth(leafMap[currentRow].leafs[leafIndex].num), 10);
500 if (leafHeight > leafMap[currentRow].height) {
501 leafMap[currentRow].height = leafHeight;
503 if (leafIndex===0) { bottomPos += this.padding + leafMap[currentRow].height; }
504 rightPos += leafWidth + this.padding;
505 if (rightPos > maxRight) { maxRight = rightPos; }
508 if (i == seekIndex) {
509 seekTop = bottomPos - this.padding - leafMap[currentRow].height;
513 // reset the bottom position based on thumbnails
514 $('#BRpageview').height(bottomPos);
516 var pageViewBuffer = Math.floor(($('#BRcontainer').attr('scrollWidth') - maxRight) / 2) - 14;
518 // If seekTop is defined, seeking was requested and target found
519 if (typeof(seekTop) != 'undefined') {
520 $('#BRcontainer').scrollTop( seekTop );
523 var scrollTop = $('#BRcontainer').attr('scrollTop');
524 var scrollBottom = scrollTop + $('#BRcontainer').height();
528 var rowsToDisplay = [];
530 // Visible leafs with least/greatest index
531 var leastVisible = this.numLeafs - 1;
534 // Determine the thumbnails in view
535 for (i=0; i<leafMap.length; i++) {
536 leafBottom += this.padding + leafMap[i].height;
537 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
538 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
539 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
540 if (topInView | bottomInView | middleInView) {
541 //console.log('row to display: ' + j);
542 rowsToDisplay.push(i);
543 if (leafMap[i].leafs[0].num < leastVisible) {
544 leastVisible = leafMap[i].leafs[0].num;
546 if (leafMap[i].leafs[leafMap[i].leafs.length - 1].num > mostVisible) {
547 mostVisible = leafMap[i].leafs[leafMap[i].leafs.length - 1].num;
550 if (leafTop > leafMap[i].top) { leafMap[i].top = leafTop; }
551 leafTop = leafBottom;
554 // create a buffer of preloaded rows before and after the visible rows
555 var firstRow = rowsToDisplay[0];
556 var lastRow = rowsToDisplay[rowsToDisplay.length-1];
557 for (i=1; i<this.thumbRowBuffer+1; i++) {
558 if (lastRow+i < leafMap.length) { rowsToDisplay.push(lastRow+i); }
560 for (i=1; i<this.thumbRowBuffer+1; i++) {
561 if (firstRow-i >= 0) { rowsToDisplay.push(firstRow-i); }
564 // Create the thumbnail divs and images (lazy loaded)
573 for (i=0; i<rowsToDisplay.length; i++) {
574 if (BookReader.util.notInArray(rowsToDisplay[i], this.displayedRows)) {
575 row = rowsToDisplay[i];
577 for (j=0; j<leafMap[row].leafs.length; j++) {
579 leaf = leafMap[row].leafs[j].num;
581 leafWidth = this.thumbWidth;
582 leafHeight = parseInt((this.getPageHeight(leaf)*this.thumbWidth)/this.getPageWidth(leaf), 10);
583 leafTop = leafMap[row].top;
584 left = leafMap[row].leafs[index].left + pageViewBuffer;
585 if ('rl' == this.pageProgression){
586 left = viewWidth - leafWidth - left;
589 div = document.createElement("div");
590 div.id = 'pagediv'+leaf;
591 div.style.position = "absolute";
592 div.className = "BRpagedivthumb";
594 left += this.padding;
595 $(div).css('top', leafTop + 'px');
596 $(div).css('left', left+'px');
597 $(div).css('width', leafWidth+'px');
598 $(div).css('height', leafHeight+'px');
599 //$(div).text('loading...');
601 // link to page in single page mode
602 link = document.createElement("a");
603 $(link).data('leaf', leaf);
604 $(link).bind('tap', function(event) {
605 self.firstIndex = $(this).data('leaf');
606 self.switchMode(self.constMode1up);
607 event.preventDefault();
610 // $$$ we don't actually go to this URL (click is handled in handler above)
611 link.href = '#page/' + (this.getPageNum(leaf)) +'/mode/1up' ;
614 $('#BRpageview').append(div);
616 img = document.createElement("img");
617 var thumbReduce = Math.floor(this.getPageWidth(leaf) / this.thumbWidth);
619 $(img).attr('src', this.imagesBaseURL + 'transparent.png')
620 .css({'width': leafWidth+'px', 'height': leafHeight+'px' })
621 .addClass('BRlazyload')
622 // Store the URL of the image that will replace this one
623 .data('srcURL', this._getPageURI(leaf, thumbReduce));
625 //console.log('displaying thumbnail: ' + leaf);
630 // Remove thumbnails that are not to be displayed
632 for (i=0; i<this.displayedRows.length; i++) {
633 if (BookReader.util.notInArray(this.displayedRows[i], rowsToDisplay)) {
634 row = this.displayedRows[i];
636 // $$$ Safari doesn't like the comprehension
637 //var rowLeafs = [leaf.num for each (leaf in leafMap[row].leafs)];
638 //console.log('Removing row ' + row + ' ' + rowLeafs);
640 for (k=0; k<leafMap[row].leafs.length; k++) {
641 index = leafMap[row].leafs[k].num;
642 //console.log('Removing leaf ' + index);
643 $('#pagediv'+index).remove();
647 var mRow = this.displayedRows[i];
648 var mLeafs = '[' + [leaf.num for each (leaf in leafMap[mRow].leafs)] + ']';
649 console.log('NOT Removing row ' + mRow + ' ' + mLeafs);
654 // Update which page is considered current to make sure a visible page is the current one
655 var currentIndex = this.currentIndex();
656 // console.log('current ' + currentIndex);
657 // console.log('least visible ' + leastVisible + ' most visible ' + mostVisible);
658 if (currentIndex < leastVisible) {
659 this.setCurrentIndex(leastVisible);
660 } else if (currentIndex > mostVisible) {
661 this.setCurrentIndex(mostVisible);
664 this.displayedRows = rowsToDisplay.slice();
666 // Update hash, but only if we're currently displaying a leaf
667 // Hack that fixes #365790
668 if (this.displayedRows.length > 0) {
669 this.updateLocationHash();
672 // remove previous highlights
673 $('.BRpagedivthumb_highlight').removeClass('BRpagedivthumb_highlight');
675 // highlight current page
676 $('#pagediv'+this.currentIndex()).addClass('BRpagedivthumb_highlight');
678 this.lazyLoadThumbnails();
680 // Update page number box. $$$ refactor to function
681 if (null !== this.getPageNum(this.currentIndex())) {
682 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
684 $("#BRpagenum").val('');
687 this.updateToolbarZoom(this.reduce);
690 BookReader.prototype.lazyLoadThumbnails = function() {
692 // console.log('lazy load');
694 // We check the complete property since load may not be fired if loading from the cache
695 $('.BRlazyloading').filter('[complete=true]').removeClass('BRlazyloading');
697 var loading = $('.BRlazyloading').length;
698 var toLoad = this.thumbMaxLoading - loading;
700 // console.log(' ' + loading + ' thumbnails loading');
701 // console.log(' this.thumbMaxLoading ' + this.thumbMaxLoading);
706 // $$$ TODO load those near top (but not beyond) page view first
707 $('#BRpageview img.BRlazyload').filter(':lt(' + toLoad + ')').each( function() {
708 self.lazyLoadImage(this);
713 BookReader.prototype.lazyLoadImage = function (dummyImage) {
714 //console.log(' lazy load started for ' + $(dummyImage).data('srcURL').match('([0-9]{4}).jp2')[1] );
716 var img = new Image();
720 .addClass('BRlazyloading')
721 .one('load', function() {
722 //if (console) { console.log(' onload ' + $(this).attr('src').match('([0-9]{4}).jp2')[1]); };
724 $(this).removeClass('BRlazyloading');
726 // $$$ Calling lazyLoadThumbnails here was causing stack overflow on IE so
727 // we call the function after a slight delay. Also the img.complete property
728 // is not yet set in IE8 inside this onload handler
729 setTimeout(function() { self.lazyLoadThumbnails(); }, 100);
731 .one('error', function() {
732 // Remove class so we no longer count as loading
733 $(this).removeClass('BRlazyloading');
735 .attr( { width: $(dummyImage).width(),
736 height: $(dummyImage).height(),
737 src: $(dummyImage).data('srcURL')
740 // replace with the new img
741 $(dummyImage).before(img).remove();
743 img = null; // tidy up closure
747 // drawLeafsTwoPage()
748 //______________________________________________________________________________
749 BookReader.prototype.drawLeafsTwoPage = function() {
750 var scrollTop = $('#BRtwopageview').attr('scrollTop');
751 var scrollBottom = scrollTop + $('#BRtwopageview').height();
753 // $$$ we should use calculated values in this.twoPage (recalc if necessary)
755 var indexL = this.twoPage.currentIndexL;
757 var heightL = this._getPageHeight(indexL);
758 var widthL = this._getPageWidth(indexL);
760 var leafEdgeWidthL = this.leafEdgeWidth(indexL);
761 var leafEdgeWidthR = this.twoPage.edgeWidth - leafEdgeWidthL;
762 //var bookCoverDivWidth = this.twoPage.width*2 + 20 + this.twoPage.edgeWidth; // $$$ hardcoded cover width
763 var bookCoverDivWidth = this.twoPage.bookCoverDivWidth;
764 //console.log(leafEdgeWidthL);
766 var middle = this.twoPage.middle; // $$$ getter instead?
767 var top = this.twoPageTop();
768 var bookCoverDivLeft = this.twoPage.bookCoverDivLeft;
770 this.twoPage.scaledWL = this.getPageWidth2UP(indexL);
771 this.twoPage.gutter = this.twoPageGutter();
773 this.prefetchImg(indexL);
774 $(this.prefetchedImgs[indexL]).css({
775 position: 'absolute',
776 left: this.twoPage.gutter-this.twoPage.scaledWL+'px',
779 backgroundColor: this.getPageBackgroundColor(indexL),
780 height: this.twoPage.height +'px', // $$$ height forced the same for both pages
781 width: this.twoPage.scaledWL + 'px',
782 borderRight: '1px solid black',
784 }).appendTo('#BRtwopageview');
786 var indexR = this.twoPage.currentIndexR;
787 var heightR = this._getPageHeight(indexR);
788 var widthR = this._getPageWidth(indexR);
790 // $$$ should use getwidth2up?
791 //var scaledWR = this.twoPage.height*widthR/heightR;
792 this.twoPage.scaledWR = this.getPageWidth2UP(indexR);
793 this.prefetchImg(indexR);
794 $(this.prefetchedImgs[indexR]).css({
795 position: 'absolute',
796 left: this.twoPage.gutter+'px',
799 backgroundColor: this.getPageBackgroundColor(indexR),
800 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
801 width: this.twoPage.scaledWR + 'px',
802 borderLeft: '1px solid black',
804 }).appendTo('#BRtwopageview');
807 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
808 this.setMouseHandlers2UP();
809 this.twoPageSetCursor();
811 this.updatePageNumBox2UP();
812 this.updateToolbarZoom(this.reduce);
814 // this.twoPagePlaceFlipAreas(); // No longer used
818 // updatePageNumBox2UP
819 //______________________________________________________________________________
820 BookReader.prototype.updatePageNumBox2UP = function() {
821 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
822 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
824 $("#BRpagenum").val('');
826 this.updateLocationHash();
830 //______________________________________________________________________________
831 BookReader.prototype.loadLeafs = function() {
835 if (null == this.timer) {
836 this.timer=setTimeout(function(){self.drawLeafs()},250);
838 clearTimeout(this.timer);
839 this.timer=setTimeout(function(){self.drawLeafs()},250);
845 // Pass 1 to zoom in, anything else to zoom out
846 //______________________________________________________________________________
847 BookReader.prototype.zoom = function(direction) {
849 case this.constMode1up:
850 if (direction == 1) {
852 return this.zoom1up('in');
854 return this.zoom1up('out');
857 case this.constMode2up:
858 if (direction == 1) {
860 return this.zoom2up('in');
862 return this.zoom2up('out');
865 case this.constModeThumb:
866 // XXX update zoomThumb for named directions
867 return this.zoomThumb(direction);
873 //______________________________________________________________________________
874 BookReader.prototype.zoom1up = function(direction) {
876 if (2 == this.mode) { //can only zoom in 1-page mode
881 var reduceFactor = this.nextReduce(this.reduce, direction, this.onePage.reductionFactors);
883 if (this.reduce == reduceFactor.reduce) {
884 // Already at this level
888 this.reduce = reduceFactor.reduce; // $$$ incorporate into function
889 this.autofit = reduceFactor.autofit;
891 this.pageScale = this.reduce; // preserve current reduce
892 this.resizePageView();
894 $('#BRpageview').empty()
895 this.displayedIndices = [];
898 this.updateToolbarZoom(this.reduce);
900 // Recalculate search hilites
901 this.removeSearchHilites();
902 this.updateSearchHilites();
907 //______________________________________________________________________________
908 BookReader.prototype.resizePageView = function() {
910 // $$$ This code assumes 1up mode
911 // e.g. does not preserve position in thumbnail mode
912 // See http://bugs.launchpad.net/bookreader/+bug/552972
915 case this.constMode1up:
916 case this.constMode2up:
917 this.resizePageView1up();
919 case this.constModeThumb:
920 this.prepareThumbnailView( this.currentIndex() );
923 alert('Resize not implemented for this mode');
927 BookReader.prototype.resizePageView1up = function() {
930 //var viewWidth = $('#BRcontainer').width(); //includes scrollBar
931 var viewWidth = $('#BRcontainer').attr('clientWidth');
933 var oldScrollTop = $('#BRcontainer').attr('scrollTop');
934 var oldScrollLeft = $('#BRcontainer').attr('scrollLeft');
935 var oldPageViewHeight = $('#BRpageview').height();
936 var oldPageViewWidth = $('#BRpageview').width();
938 var oldCenterY = this.centerY1up();
939 var oldCenterX = this.centerX1up();
941 if (0 != oldPageViewHeight) {
942 var scrollRatio = oldCenterY / oldPageViewHeight;
947 // Recalculate 1up reduction factors
948 this.onePageCalculateReductionFactors( $('#BRcontainer').attr('clientWidth'),
949 $('#BRcontainer').attr('clientHeight') );
950 // Update current reduce (if in autofit)
952 var reductionFactor = this.nextReduce(this.reduce, this.autofit, this.onePage.reductionFactors);
953 this.reduce = reductionFactor.reduce;
956 for (i=0; i<this.numLeafs; i++) {
957 viewHeight += parseInt(this._getPageHeight(i)/this.reduce) + this.padding;
958 var width = parseInt(this._getPageWidth(i)/this.reduce);
959 if (width>viewWidth) viewWidth=width;
961 $('#BRpageview').height(viewHeight);
962 $('#BRpageview').width(viewWidth);
964 var newCenterY = scrollRatio*viewHeight;
965 var newTop = Math.max(0, Math.floor( newCenterY - $('#BRcontainer').height()/2 ));
966 $('#BRcontainer').attr('scrollTop', newTop);
968 // We use clientWidth here to avoid miscalculating due to scroll bar
969 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
970 var newLeft = newCenterX - $('#BRcontainer').attr('clientWidth') / 2;
971 newLeft = Math.max(newLeft, 0);
972 $('#BRcontainer').attr('scrollLeft', newLeft);
973 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
975 //this.centerPageView();
978 this.removeSearchHilites();
979 this.updateSearchHilites();
984 //______________________________________________________________________________
985 // Returns the current offset of the viewport center in scaled document coordinates.
986 BookReader.prototype.centerX1up = function() {
988 if ($('#BRpageview').width() < $('#BRcontainer').attr('clientWidth')) { // fully shown
989 centerX = $('#BRpageview').width();
991 centerX = $('#BRcontainer').attr('scrollLeft') + $('#BRcontainer').attr('clientWidth') / 2;
993 centerX = Math.floor(centerX);
998 //______________________________________________________________________________
999 // Returns the current offset of the viewport center in scaled document coordinates.
1000 BookReader.prototype.centerY1up = function() {
1001 var centerY = $('#BRcontainer').attr('scrollTop') + $('#BRcontainer').height() / 2;
1002 return Math.floor(centerY);
1006 //______________________________________________________________________________
1007 BookReader.prototype.centerPageView = function() {
1009 var scrollWidth = $('#BRcontainer').attr('scrollWidth');
1010 var clientWidth = $('#BRcontainer').attr('clientWidth');
1011 //console.log('sW='+scrollWidth+' cW='+clientWidth);
1012 if (scrollWidth > clientWidth) {
1013 $('#BRcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
1018 // zoom2up(direction)
1019 //______________________________________________________________________________
1020 BookReader.prototype.zoom2up = function(direction) {
1022 // Hard stop autoplay
1023 this.stopFlipAnimations();
1025 // Recalculate autofit factors
1026 this.twoPageCalculateReductionFactors();
1028 // Get new zoom state
1029 var reductionFactor = this.nextReduce(this.reduce, direction, this.twoPage.reductionFactors);
1030 if ((this.reduce == reductionFactor.reduce) && (this.twoPage.autofit == reductionFactor.autofit)) {
1034 this.twoPage.autofit = reductionFactor.autofit;
1035 this.reduce = reductionFactor.reduce;
1036 this.pageScale = this.reduce; // preserve current reduce
1038 // Preserve view center position
1039 var oldCenter = this.twoPageGetViewCenter();
1041 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
1042 // $$$ An improvement would be to use the low res image until the larger one is loaded.
1043 if (1 == direction) {
1044 for (var img in this.prefetchedImgs) {
1045 delete this.prefetchedImgs[img];
1049 // Prepare view with new center to minimize visual glitches
1050 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
1053 BookReader.prototype.zoomThumb = function(direction) {
1054 var oldColumns = this.thumbColumns;
1055 switch (direction) {
1057 this.thumbColumns += 1;
1060 this.thumbColumns -= 1;
1065 if (this.thumbColumns < 2) {
1066 this.thumbColumns = 2;
1067 } else if (this.thumbColumns > 8) {
1068 this.thumbColumns = 8;
1071 if (this.thumbColumns != oldColumns) {
1072 this.prepareThumbnailView();
1076 // Returns the width per thumbnail to display the requested number of columns
1077 // Note: #BRpageview must already exist since its width is used to calculate the
1079 BookReader.prototype.getThumbnailWidth = function(thumbnailColumns) {
1080 var padding = (thumbnailColumns + 1) * this.padding;
1081 var width = ($('#BRpageview').width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides
1082 return parseInt(width);
1085 // quantizeReduce(reduce)
1086 //______________________________________________________________________________
1087 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
1088 BookReader.prototype.quantizeReduce = function(reduce, reductionFactors) {
1089 var quantized = reductionFactors[0].reduce;
1090 var distance = Math.abs(reduce - quantized);
1091 for (var i = 1; i < reductionFactors.length; i++) {
1092 newDistance = Math.abs(reduce - reductionFactors[i].reduce);
1093 if (newDistance < distance) {
1094 distance = newDistance;
1095 quantized = reductionFactors[i].reduce;
1102 // reductionFactors should be array of sorted reduction factors
1103 // e.g. [ {reduce: 0.25, autofit: null}, {reduce: 0.3, autofit: 'width'}, {reduce: 1, autofit: null} ]
1104 BookReader.prototype.nextReduce = function( currentReduce, direction, reductionFactors ) {
1106 // XXX add 'closest', to replace quantize function
1108 if (direction == 'in') {
1109 var newReduceIndex = 0;
1111 for (var i = 1; i < reductionFactors.length; i++) {
1112 if (reductionFactors[i].reduce < currentReduce) {
1116 return reductionFactors[newReduceIndex];
1118 } else if (direction == 'out') { // zoom out
1119 var lastIndex = reductionFactors.length - 1;
1120 var newReduceIndex = lastIndex;
1122 for (var i = lastIndex; i >= 0; i--) {
1123 if (reductionFactors[i].reduce > currentReduce) {
1127 return reductionFactors[newReduceIndex];
1130 // Asked for specific autofit mode
1131 for (var i = 0; i < reductionFactors.length; i++) {
1132 if (reductionFactors[i].autofit == direction) {
1133 return reductionFactors[i];
1137 alert('Could not find reduction factor for direction ' + direction);
1138 return reductionFactors[0];
1142 BookReader.prototype._reduceSort = function(a, b) {
1143 return a.reduce - b.reduce;
1147 //______________________________________________________________________________
1148 // Attempts to jump to page. Returns true if page could be found, false otherwise.
1149 BookReader.prototype.jumpToPage = function(pageNum) {
1151 var pageIndex = this.getPageIndex(pageNum);
1153 if ('undefined' != typeof(pageIndex)) {
1156 this.jumpToIndex(pageIndex);
1157 $('#BRcontainer').attr('scrollTop', leafTop);
1166 //______________________________________________________________________________
1167 BookReader.prototype.jumpToIndex = function(index, pageX, pageY) {
1169 if (2 == this.mode) {
1172 // By checking against min/max we do nothing if requested index
1174 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1175 this.flipBackToIndex(index);
1176 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1177 this.flipFwdToIndex(index);
1180 } else if (3 == this.mode) {
1181 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
1191 for (i=0; i<(index+1); i++) {
1192 leafWidth = this.thumbWidth;
1193 if (rightPos + (leafWidth + this.padding) > viewWidth){
1199 leafHeight = parseInt((this.getPageHeight(leafIndex)*this.thumbWidth)/this.getPageWidth(leafIndex), 10);
1200 if (leafHeight > rowHeight) { rowHeight = leafHeight; }
1201 if (leafIndex==0) { leafTop = bottomPos; }
1202 if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
1203 rightPos += leafWidth + this.padding;
1206 this.firstIndex=index;
1207 if ($('#BRcontainer').attr('scrollTop') == leafTop) {
1210 $('#BRcontainer').animate({scrollTop: leafTop },'fast');
1217 for (i=0; i<index; i++) {
1218 h = parseInt(this._getPageHeight(i)/this.reduce);
1219 leafTop += h + this.padding;
1223 //console.log('pageY ' + pageY);
1224 var offset = parseInt( (pageY) / this.reduce);
1225 offset -= $('#BRcontainer').attr('clientHeight') >> 1;
1226 //console.log( 'jumping to ' + leafTop + ' ' + offset);
1231 var offset = parseInt( (pageX) / this.reduce);
1232 offset -= $('#BRcontainer').attr('clientWidth') >> 1;
1236 //$('#BRcontainer').attr('scrollTop', leafTop);
1237 $('#BRcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
1243 //______________________________________________________________________________
1244 BookReader.prototype.switchMode = function(mode) {
1246 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
1248 if (mode == this.mode) {
1252 if (!this.canSwitchToMode(mode)) {
1257 this.removeSearchHilites();
1260 this.switchToolbarMode(mode);
1262 // reinstate scale if moving from thumbnail view
1263 if (this.pageScale != this.reduce) {
1264 this.reduce = this.pageScale;
1267 // $$$ TODO preserve center of view when switching between mode
1268 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
1270 // XXX maybe better to preserve zoom in each mode
1272 this.onePageCalculateReductionFactors( $('#BRcontainer').attr('clientWidth'), $('#BRcontainer').attr('clientHeight'));
1273 this.reduce = this.quantizeReduce(this.reduce, this.onePage.reductionFactors);
1274 this.prepareOnePageView();
1275 } else if (3 == mode) {
1276 this.reduce = this.quantizeReduce(this.reduce, this.reductionFactors);
1277 this.prepareThumbnailView();
1279 // $$$ why don't we save autofit?
1280 this.twoPage.autofit = null; // Take zoom level from other mode
1281 this.twoPageCalculateReductionFactors();
1282 this.reduce = this.quantizeReduce(this.reduce, this.twoPage.reductionFactors);
1283 this.prepareTwoPageView();
1284 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
1289 //prepareOnePageView()
1290 //______________________________________________________________________________
1291 BookReader.prototype.prepareOnePageView = function() {
1293 // var startLeaf = this.displayedIndices[0];
1294 var startLeaf = this.currentIndex();
1296 $('#BRcontainer').empty();
1297 $('#BRcontainer').css({
1298 overflowY: 'scroll',
1302 $("#BRcontainer").append("<div id='BRpageview'></div>");
1304 // Attaches to first child - child must be present
1305 $('#BRcontainer').dragscrollable();
1306 this.bindGestures($('#BRcontainer'));
1308 // $$$ keep select enabled for now since disabling it breaks keyboard
1309 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1310 // BookReader.util.disableSelect($('#BRpageview'));
1312 this.resizePageView();
1314 this.jumpToIndex(startLeaf);
1315 this.displayedIndices = [];
1317 this.drawLeafsOnePage();
1320 //prepareThumbnailView()
1321 //______________________________________________________________________________
1322 BookReader.prototype.prepareThumbnailView = function() {
1324 $('#BRcontainer').empty();
1325 $('#BRcontainer').css({
1326 overflowY: 'scroll',
1330 $("#BRcontainer").append("<div id='BRpageview'></div>");
1332 $('#BRcontainer').dragscrollable();
1333 this.bindGestures($('#BRcontainer'));
1335 // $$$ keep select enabled for now since disabling it breaks keyboard
1336 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1337 // BookReader.util.disableSelect($('#BRpageview'));
1339 this.thumbWidth = this.getThumbnailWidth(this.thumbColumns);
1340 this.reduce = this.getPageWidth(0)/this.thumbWidth;
1342 this.displayedRows = [];
1344 // Draw leafs with current index directly in view (no animating to the index)
1345 this.drawLeafsThumbnail( this.currentIndex() );
1349 // prepareTwoPageView()
1350 //______________________________________________________________________________
1351 // Some decisions about two page view:
1353 // Both pages will be displayed at the same height, even if they were different physical/scanned
1354 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
1355 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
1356 // aspect ratio to determine the height.
1358 // The two page view div is resized to keep the middle of the book in the middle of the div
1359 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the BRcontent
1360 // div requires adjusting the offset of BRtwpageview and/or scrolling in BRcontent.
1361 BookReader.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
1362 $('#BRcontainer').empty();
1363 $('#BRcontainer').css('overflow', 'auto');
1365 // We want to display two facing pages. We may be missing
1366 // one side of the spread because it is the first/last leaf,
1367 // foldouts, missing pages, etc
1369 //var targetLeaf = this.displayedIndices[0];
1370 var targetLeaf = this.firstIndex;
1372 if (targetLeaf < this.firstDisplayableIndex()) {
1373 targetLeaf = this.firstDisplayableIndex();
1376 if (targetLeaf > this.lastDisplayableIndex()) {
1377 targetLeaf = this.lastDisplayableIndex();
1380 //this.twoPage.currentIndexL = null;
1381 //this.twoPage.currentIndexR = null;
1382 //this.pruneUnusedImgs();
1384 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1385 this.twoPage.currentIndexL = currentSpreadIndices[0];
1386 this.twoPage.currentIndexR = currentSpreadIndices[1];
1387 this.firstIndex = this.twoPage.currentIndexL;
1389 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1391 this.pruneUnusedImgs();
1392 this.prefetch(); // Preload images or reload if scaling has changed
1394 //console.dir(this.twoPage);
1396 // Add the two page view
1397 // $$$ Can we get everything set up and then append?
1398 $('#BRcontainer').append('<div id="BRtwopageview"></div>');
1400 // Attaches to first child, so must come after we add the page view
1401 $('#BRcontainer').dragscrollable();
1402 this.bindGestures($('#BRcontainer'));
1404 // $$$ calculate first then set
1405 $('#BRtwopageview').css( {
1406 height: this.twoPage.totalHeight + 'px',
1407 width: this.twoPage.totalWidth + 'px',
1408 position: 'absolute'
1411 // If there will not be scrollbars (e.g. when zooming out) we center the book
1412 // since otherwise the book will be stuck off-center
1413 if (this.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
1414 centerPercentageX = 0.5;
1416 if (this.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
1417 centerPercentageY = 0.5;
1420 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1422 this.twoPage.coverDiv = document.createElement('div');
1423 $(this.twoPage.coverDiv).attr('id', 'BRbookcover').css({
1424 width: this.twoPage.bookCoverDivWidth + 'px',
1425 height: this.twoPage.bookCoverDivHeight+'px',
1426 visibility: 'visible',
1427 position: 'absolute',
1428 left: this.twoPage.bookCoverDivLeft + 'px',
1429 top: this.twoPage.bookCoverDivTop+'px',
1430 }).appendTo('#BRtwopageview');
1432 this.leafEdgeR = document.createElement('div');
1433 this.leafEdgeR.className = 'BRleafEdgeR';
1434 $(this.leafEdgeR).css({
1435 width: this.twoPage.leafEdgeWidthR + 'px',
1436 height: this.twoPage.height-1 + 'px',
1437 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1438 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1439 }).appendTo('#BRtwopageview');
1441 this.leafEdgeL = document.createElement('div');
1442 this.leafEdgeL.className = 'BRleafEdgeL';
1443 $(this.leafEdgeL).css({
1444 width: this.twoPage.leafEdgeWidthL + 'px',
1445 height: this.twoPage.height-1 + 'px',
1446 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1447 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1448 }).appendTo('#BRtwopageview');
1450 div = document.createElement('div');
1451 $(div).attr('id', 'BRbookspine').css({
1452 width: this.twoPage.bookSpineDivWidth+'px',
1453 height: this.twoPage.bookSpineDivHeight+'px',
1454 left: this.twoPage.bookSpineDivLeft+'px',
1455 top: this.twoPage.bookSpineDivTop+'px'
1456 }).appendTo('#BRtwopageview');
1458 var self = this; // for closure
1460 /* Flip areas no longer used
1461 this.twoPage.leftFlipArea = document.createElement('div');
1462 this.twoPage.leftFlipArea.className = 'BRfliparea';
1463 $(this.twoPage.leftFlipArea).attr('id', 'BRleftflip').css({
1465 width: this.twoPageFlipAreaWidth() + 'px',
1466 height: this.twoPageFlipAreaHeight() + 'px',
1467 position: 'absolute',
1468 left: this.twoPageLeftFlipAreaLeft() + 'px',
1469 top: this.twoPageFlipAreaTop() + 'px',
1472 }).bind('click', function(e) {
1474 }).bind('mousedown', function(e) {
1476 }).appendTo('#BRtwopageview');
1478 this.twoPage.rightFlipArea = document.createElement('div');
1479 this.twoPage.rightFlipArea.className = 'BRfliparea';
1480 $(this.twoPage.rightFlipArea).attr('id', 'BRrightflip').css({
1482 width: this.twoPageFlipAreaWidth() + 'px',
1483 height: this.twoPageFlipAreaHeight() + 'px',
1484 position: 'absolute',
1485 left: this.twoPageRightFlipAreaLeft() + 'px',
1486 top: this.twoPageFlipAreaTop() + 'px',
1489 }).bind('click', function(e) {
1491 }).bind('mousedown', function(e) {
1493 }).appendTo('#BRtwopageview');
1496 this.prepareTwoPagePopUp();
1498 this.displayedIndices = [];
1500 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1501 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1503 this.drawLeafsTwoPage();
1504 this.updateToolbarZoom(this.reduce);
1508 this.removeSearchHilites();
1509 this.updateSearchHilites();
1513 // prepareTwoPagePopUp()
1515 // This function prepares the "View Page n" popup that shows while the mouse is
1516 // over the left/right "stack of sheets" edges. It also binds the mouse
1517 // events for these divs.
1518 //______________________________________________________________________________
1519 BookReader.prototype.prepareTwoPagePopUp = function() {
1521 this.twoPagePopUp = document.createElement('div');
1522 this.twoPagePopUp.className = 'BRtwoPagePopUp';
1523 $(this.twoPagePopUp).css({
1525 }).appendTo('#BRcontainer');
1526 $(this.twoPagePopUp).hide();
1528 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1529 $(e.data.twoPagePopUp).show();
1532 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1533 $(e.data.twoPagePopUp).hide();
1536 $(this.leafEdgeL).bind('click', this, function(e) {
1538 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1539 e.data.jumpToIndex(jumpIndex);
1542 $(this.leafEdgeR).bind('click', this, function(e) {
1544 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1545 e.data.jumpToIndex(jumpIndex);
1548 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1550 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1551 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1553 // $$$ TODO: Make sure popup is positioned so that it is in view
1554 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1555 $(e.data.twoPagePopUp).css({
1556 left: e.pageX- $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() + 20 + 'px',
1557 top: e.pageY - $('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1561 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1563 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1564 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1566 // $$$ TODO: Make sure popup is positioned so that it is in view
1567 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1568 $(e.data.twoPagePopUp).css({
1569 left: e.pageX - $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1570 top: e.pageY-$('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1575 // calculateSpreadSize()
1576 //______________________________________________________________________________
1577 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1578 // this.twoPage.currentIndexR
1579 // This function sets this.twoPage.height, twoPage.width
1581 BookReader.prototype.calculateSpreadSize = function() {
1583 var firstIndex = this.twoPage.currentIndexL;
1584 var secondIndex = this.twoPage.currentIndexR;
1585 //console.log('first page is ' + firstIndex);
1587 // Calculate page sizes and total leaf width
1589 if ( this.twoPage.autofit) {
1590 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1592 // set based on reduction factor
1593 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1596 // Both pages together
1597 this.twoPage.height = spreadSize.height;
1598 this.twoPage.width = spreadSize.width;
1601 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1602 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1605 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1606 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1607 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1611 // The width of the book cover div. The combined width of both pages, twice the width
1612 // of the book cover internal padding (2*10) and the page edges
1613 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1614 // The height of the book cover div
1615 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1618 // We calculate the total width and height for the div so that we can make the book
1620 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1621 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1622 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1623 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1624 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1625 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1627 // We want to minimize the unused space in two-up mode (maximize the amount of page
1628 // shown). We give width to the leaf edges and these widths change (though the sum
1629 // of the two remains constant) as we flip through the book. With the book
1630 // cover centered and fixed in the BRcontainer div the page images will meet
1631 // at the "gutter" which is generally offset from the center.
1632 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1633 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1635 // The left edge of the book cover moves depending on the width of the pages
1636 // $$$ change to getter
1637 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1638 // The top edge of the book cover stays a fixed distance from the top
1639 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1642 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1643 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1644 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1647 this.reduce = spreadSize.reduce; // $$$ really set this here?
1650 BookReader.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1653 // We check which page is closest to a "normal" page and use that to set the height
1654 // for both pages. This means that foldouts and other odd size pages will be displayed
1655 // smaller than the nominal zoom amount.
1656 var canon5Dratio = 1.5;
1659 height: this._getPageHeight(firstIndex),
1660 width: this._getPageWidth(firstIndex)
1664 height: this._getPageHeight(secondIndex),
1665 width: this._getPageWidth(secondIndex)
1668 var firstIndexRatio = first.height / first.width;
1669 var secondIndexRatio = second.height / second.width;
1670 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1673 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1674 ratio = firstIndexRatio;
1675 //console.log('using firstIndexRatio ' + ratio);
1677 ratio = secondIndexRatio;
1678 //console.log('using secondIndexRatio ' + ratio);
1681 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1682 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1);
1683 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1685 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1686 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1688 ideal.width = ($('#BRcontainer').width() - widthOutsidePages) >> 1;
1689 ideal.width -= 10; // $$$ fudge factor
1690 ideal.height = $('#BRcontainer').height() - heightOutsidePages;
1691 ideal.height -= 20; // fudge factor
1692 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1694 if (ideal.height/ratio <= ideal.width) {
1696 ideal.width = parseInt(ideal.height/ratio);
1699 ideal.height = parseInt(ideal.width*ratio);
1702 // $$$ check this logic with large spreads
1703 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1708 // getSpreadSizeFromReduce()
1709 //______________________________________________________________________________
1710 // Returns the spread size calculated from the reduction factor for the given pages
1711 BookReader.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1712 var spreadSize = {};
1713 // $$$ Scale this based on reduce?
1714 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1715 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1716 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1718 // $$$ Possibly incorrect -- we should make height "dominant"
1719 var nativeWidth = this._getPageWidth(firstIndex) + this._getPageWidth(secondIndex);
1720 var nativeHeight = this._getPageHeight(firstIndex) + this._getPageHeight(secondIndex);
1721 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1722 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1723 spreadSize.reduce = reduce;
1728 // twoPageGetAutofitReduce()
1729 //______________________________________________________________________________
1730 // Returns the current ideal reduction factor
1731 BookReader.prototype.twoPageGetAutofitReduce = function() {
1732 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1733 return spreadSize.reduce;
1736 BookReader.prototype.onePageGetAutofitWidth = function() {
1737 var widthPadding = 50;
1738 return (this.getMedianPageSize().width + 0.0) / ($('#BRcontainer').attr('clientWidth') - widthPadding * 2);
1741 BookReader.prototype.onePageGetAutofitHeight = function() {
1742 var heightPadding = 10;
1743 return (this.getMedianPageSize().height + 0.0) / ($('#BRcontainer').attr('clientHeight') - heightPadding * 2);
1746 BookReader.prototype.getMedianPageSize = function() {
1747 if (this._medianPageSize) {
1748 return this._medianPageSize;
1751 // A little expensive but we just do it once
1754 for (var i = 0; i < this.numLeafs; i++) {
1755 widths.push(this.getPageWidth(i));
1756 heights.push(this.getPageHeight(i));
1762 this._medianPageSize = { width: widths[parseInt(widths.length / 2)], height: heights[parseInt(heights.length / 2)] };
1763 return this._medianPageSize;
1766 // Update the reduction factors for 1up mode given the available width and height. Recalculates
1767 // the autofit reduction factors.
1768 BookReader.prototype.onePageCalculateReductionFactors = function( width, height ) {
1769 this.onePage.reductionFactors = this.reductionFactors.concat(
1771 { reduce: this.onePageGetAutofitWidth(), autofit: 'width' },
1772 { reduce: this.onePageGetAutofitHeight(), autofit: 'height'}
1774 this.onePage.reductionFactors.sort(this._reduceSort);
1777 BookReader.prototype.twoPageCalculateReductionFactors = function() {
1778 this.twoPage.reductionFactors = this.reductionFactors.concat(
1780 { reduce: this.getIdealSpreadSize( this.twoPage.currentIndexL, this.twoPage.currentIndexR ).reduce,
1783 this.twoPage.reductionFactors.sort(this._reduceSort);
1786 // twoPageSetCursor()
1787 //______________________________________________________________________________
1788 // Set the cursor for two page view
1789 BookReader.prototype.twoPageSetCursor = function() {
1790 // console.log('setting cursor');
1791 if ( ($('#BRtwopageview').width() > $('#BRcontainer').attr('clientWidth')) ||
1792 ($('#BRtwopageview').height() > $('#BRcontainer').attr('clientHeight')) ) {
1793 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1794 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1796 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1797 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1802 //______________________________________________________________________________
1803 // Returns the currently active index.
1804 BookReader.prototype.currentIndex = function() {
1805 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1806 if (this.mode == this.constMode1up || this.mode == this.constModeThumb) {
1807 return this.firstIndex; // $$$ TODO page in center of view would be better
1808 } else if (this.mode == this.constMode2up) {
1809 // Only allow indices that are actually present in book
1810 return BookReader.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
1812 throw 'currentIndex called for unimplemented mode ' + this.mode;
1816 // setCurrentIndex(index)
1817 //______________________________________________________________________________
1818 // Sets the idea of current index without triggering other actions such as animation.
1819 // Compare to jumpToIndex which animates to that index
1820 BookReader.prototype.setCurrentIndex = function(index) {
1821 this.firstIndex = index;
1826 //______________________________________________________________________________
1827 // Flip the right page over onto the left
1828 BookReader.prototype.right = function() {
1829 if ('rl' != this.pageProgression) {
1839 //______________________________________________________________________________
1840 // Flip to the rightmost page
1841 BookReader.prototype.rightmost = function() {
1842 if ('rl' != this.pageProgression) {
1850 //______________________________________________________________________________
1851 // Flip the left page over onto the right.
1852 BookReader.prototype.left = function() {
1853 if ('rl' != this.pageProgression) {
1863 //______________________________________________________________________________
1864 // Flip to the leftmost page
1865 BookReader.prototype.leftmost = function() {
1866 if ('rl' != this.pageProgression) {
1874 //______________________________________________________________________________
1875 BookReader.prototype.next = function() {
1876 if (2 == this.mode) {
1878 this.flipFwdToIndex(null);
1880 if (this.firstIndex < this.lastDisplayableIndex()) {
1881 this.jumpToIndex(this.firstIndex+1);
1887 //______________________________________________________________________________
1888 BookReader.prototype.prev = function() {
1889 if (2 == this.mode) {
1891 this.flipBackToIndex(null);
1893 if (this.firstIndex >= 1) {
1894 this.jumpToIndex(this.firstIndex-1);
1899 BookReader.prototype.first = function() {
1900 this.jumpToIndex(this.firstDisplayableIndex());
1903 BookReader.prototype.last = function() {
1904 this.jumpToIndex(this.lastDisplayableIndex());
1908 //______________________________________________________________________________
1909 // Scrolls down one screen view
1910 BookReader.prototype.scrollDown = function() {
1911 if ($.inArray(this.mode, [this.constMode2up, this.constModeThumb]) >= 0) {
1912 $('#BRcontainer').animate(
1913 { scrollTop: '+=' + $('#BRcontainer').height() * 0.95 + 'px'},
1914 450, 'easeInOutQuint'
1923 //______________________________________________________________________________
1924 // Scrolls up one screen view
1925 BookReader.prototype.scrollUp = function() {
1926 if ($.inArray(this.mode, [this.constMode2up, this.constModeThumb]) >= 0) {
1927 $('#BRcontainer').animate(
1928 { scrollTop: '-=' + $('#BRcontainer').height() * 0.95 + 'px'},
1929 450, 'easeInOutQuint'
1938 // flipBackToIndex()
1939 //______________________________________________________________________________
1940 // to flip back one spread, pass index=null
1941 BookReader.prototype.flipBackToIndex = function(index) {
1943 if (1 == this.mode) return;
1945 var leftIndex = this.twoPage.currentIndexL;
1947 if (this.animating) return;
1949 if (null != this.leafEdgeTmp) {
1950 alert('error: leafEdgeTmp should be null!');
1954 if (null == index) {
1955 index = leftIndex-2;
1957 //if (index<0) return;
1959 var previousIndices = this.getSpreadIndices(index);
1961 if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
1965 this.animating = true;
1967 if ('rl' != this.pageProgression) {
1968 // Assume LTR and we are going backward
1969 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1970 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
1972 // RTL and going backward
1973 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1974 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
1978 // flipLeftToRight()
1979 //______________________________________________________________________________
1980 // Flips the page on the left towards the page on the right
1981 BookReader.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
1983 var leftLeaf = this.twoPage.currentIndexL;
1985 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1986 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1987 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
1989 var currWidthL = this.getPageWidth2UP(leftLeaf);
1990 var newWidthL = this.getPageWidth2UP(newIndexL);
1991 var newWidthR = this.getPageWidth2UP(newIndexR);
1993 var top = this.twoPageTop();
1994 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
1996 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
1997 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
1999 //animation strategy:
2000 // 0. remove search highlight, if any.
2001 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
2002 // of the left leaf and where the user clicked in the leaf edge.
2003 // Note that if this function was triggered by left() and not a
2004 // mouse click, the width of leafEdgeTmp is very small (zero px).
2005 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
2006 // leftLeaf to width=0.
2007 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
2008 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
2009 // its new full width.
2010 // 4. After step 3 is finished, do the following:
2011 // - remove leafEdgeTmp from the dom.
2012 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
2013 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
2014 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
2015 // and width=newLeafEdgeWidthL.
2016 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
2017 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
2018 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
2019 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
2020 // - prefetch new adjacent leafs.
2021 // - set up click handlers for both new left and right leafs.
2022 // - redraw the search highlight.
2023 // - update the pagenum box and the url.
2026 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
2028 this.leafEdgeTmp = document.createElement('div');
2029 this.leafEdgeTmp.className = 'BRleafEdgeTmp';
2030 $(this.leafEdgeTmp).css({
2031 width: leafEdgeTmpW + 'px',
2032 height: this.twoPage.height-1 + 'px',
2033 left: leftEdgeTmpLeft + 'px',
2036 }).appendTo('#BRtwopageview');
2038 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
2039 $(this.leafEdgeL).css({
2040 width: newLeafEdgeWidthL+'px',
2041 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
2044 // Left gets the offset of the current left leaf from the document
2045 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
2046 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
2047 var right = $('#BRtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#BRtwopageview').offset().left-2+'px';
2049 // We change the left leaf to right positioning
2050 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
2051 $(this.prefetchedImgs[leftLeaf]).css({
2056 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
2057 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
2061 this.removeSearchHilites();
2063 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
2064 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
2066 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
2067 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
2069 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
2070 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
2071 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
2073 $(self.leafEdgeR).css({
2074 // Moves the right leaf edge
2075 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
2076 left: gutter+newWidthR+'px'
2079 $(self.leafEdgeL).css({
2080 // Moves and resizes the left leaf edge
2081 width: newLeafEdgeWidthL+'px',
2082 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2085 // Resizes the brown border div
2086 $(self.twoPage.coverDiv).css({
2087 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2088 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
2091 $(self.leafEdgeTmp).remove();
2092 self.leafEdgeTmp = null;
2094 // $$$ TODO refactor with opposite direction flip
2096 self.twoPage.currentIndexL = newIndexL;
2097 self.twoPage.currentIndexR = newIndexR;
2098 self.twoPage.scaledWL = newWidthL;
2099 self.twoPage.scaledWR = newWidthR;
2100 self.twoPage.gutter = gutter;
2102 self.firstIndex = self.twoPage.currentIndexL;
2103 self.displayedIndices = [newIndexL, newIndexR];
2104 self.pruneUnusedImgs();
2106 self.animating = false;
2108 self.updateSearchHilites2UP();
2109 self.updatePageNumBox2UP();
2111 // self.twoPagePlaceFlipAreas(); // No longer used
2112 self.setMouseHandlers2UP();
2113 self.twoPageSetCursor();
2115 if (self.animationFinishedCallback) {
2116 self.animationFinishedCallback();
2117 self.animationFinishedCallback = null;
2125 //______________________________________________________________________________
2126 // Whether we flip left or right is dependent on the page progression
2127 // to flip forward one spread, pass index=null
2128 BookReader.prototype.flipFwdToIndex = function(index) {
2130 if (this.animating) return;
2132 if (null != this.leafEdgeTmp) {
2133 alert('error: leafEdgeTmp should be null!');
2137 if (null == index) {
2138 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
2140 if (index > this.lastDisplayableIndex()) return;
2142 this.animating = true;
2144 var nextIndices = this.getSpreadIndices(index);
2146 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
2148 if ('rl' != this.pageProgression) {
2149 // We did not specify RTL
2150 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
2151 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
2154 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
2155 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
2159 // flipRightToLeft(nextL, nextR, gutter)
2160 // $$$ better not to have to pass gutter in
2161 //______________________________________________________________________________
2162 // Flip from left to right and show the nextL and nextR indices on those sides
2163 BookReader.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
2164 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2165 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
2166 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2167 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
2169 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
2171 var top = this.twoPageTop();
2172 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
2174 var middle = this.twoPage.middle;
2175 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
2177 this.leafEdgeTmp = document.createElement('div');
2178 this.leafEdgeTmp.className = 'BRleafEdgeTmp';
2179 $(this.leafEdgeTmp).css({
2180 width: leafEdgeTmpW + 'px',
2181 height: this.twoPage.height-1 + 'px',
2182 left: gutter+scaledW+'px',
2185 }).appendTo('#BRtwopageview');
2187 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
2188 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
2190 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
2191 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
2192 var newWidthL = this.getPageWidth2UP(newIndexL);
2193 var newWidthR = this.getPageWidth2UP(newIndexR);
2195 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
2197 var self = this; // closure-tastic!
2199 var speed = this.flipSpeed;
2201 this.removeSearchHilites();
2203 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
2204 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
2205 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
2206 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
2207 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
2209 $(self.leafEdgeL).css({
2210 width: newLeafEdgeWidthL+'px',
2211 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2214 // Resizes the book cover
2215 $(self.twoPage.coverDiv).css({
2216 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2217 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
2220 $(self.leafEdgeTmp).remove();
2221 self.leafEdgeTmp = null;
2223 self.twoPage.currentIndexL = newIndexL;
2224 self.twoPage.currentIndexR = newIndexR;
2225 self.twoPage.scaledWL = newWidthL;
2226 self.twoPage.scaledWR = newWidthR;
2227 self.twoPage.gutter = gutter;
2229 self.firstIndex = self.twoPage.currentIndexL;
2230 self.displayedIndices = [newIndexL, newIndexR];
2231 self.pruneUnusedImgs();
2233 self.animating = false;
2236 self.updateSearchHilites2UP();
2237 self.updatePageNumBox2UP();
2239 // self.twoPagePlaceFlipAreas(); // No longer used
2240 self.setMouseHandlers2UP();
2241 self.twoPageSetCursor();
2243 if (self.animationFinishedCallback) {
2244 self.animationFinishedCallback();
2245 self.animationFinishedCallback = null;
2251 // setMouseHandlers2UP
2252 //______________________________________________________________________________
2253 BookReader.prototype.setMouseHandlers2UP = function() {
2254 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
2262 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
2265 e.data.self.right();
2272 //______________________________________________________________________________
2273 BookReader.prototype.prefetchImg = function(index) {
2274 var pageURI = this._getPageURI(index);
2276 // Load image if not loaded or URI has changed (e.g. due to scaling)
2277 var loadImage = false;
2278 if (undefined == this.prefetchedImgs[index]) {
2279 //console.log('no image for ' + index);
2281 } else if (pageURI != this.prefetchedImgs[index].uri) {
2282 //console.log('uri changed for ' + index);
2287 //console.log('prefetching ' + index);
2288 var img = document.createElement("img");
2290 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
2291 this.prefetchedImgs[index] = img;
2296 // prepareFlipLeftToRight()
2298 //______________________________________________________________________________
2300 // Prepare to flip the left page towards the right. This corresponds to moving
2301 // backward when the page progression is left to right.
2302 BookReader.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
2304 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
2306 this.prefetchImg(prevL);
2307 this.prefetchImg(prevR);
2309 var height = this._getPageHeight(prevL);
2310 var width = this._getPageWidth(prevL);
2311 var middle = this.twoPage.middle;
2312 var top = this.twoPageTop();
2313 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
2315 // The gutter is the dividing line between the left and right pages.
2316 // It is offset from the middle to create the illusion of thickness to the pages
2317 var gutter = middle + this.gutterOffsetForIndex(prevL);
2319 //console.log(' gutter for ' + prevL + ' is ' + gutter);
2320 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
2321 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
2324 position: 'absolute',
2325 left: gutter-scaledW+'px',
2326 right: '', // clear right property
2328 height: this.twoPage.height,
2329 width: scaledW+'px',
2330 backgroundColor: this.getPageBackgroundColor(prevL),
2331 borderRight: '1px solid black',
2335 $(this.prefetchedImgs[prevL]).css(leftCSS);
2337 $('#BRtwopageview').append(this.prefetchedImgs[prevL]);
2339 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
2342 position: 'absolute',
2346 height: this.twoPage.height,
2348 backgroundColor: this.getPageBackgroundColor(prevR),
2349 borderLeft: '1px solid black',
2353 $(this.prefetchedImgs[prevR]).css(rightCSS);
2355 $('#BRtwopageview').append(this.prefetchedImgs[prevR]);
2359 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
2360 // prepareFlipRightToLeft()
2361 //______________________________________________________________________________
2362 BookReader.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
2364 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
2367 this.prefetchImg(nextL);
2368 this.prefetchImg(nextR);
2370 var height = this._getPageHeight(nextR);
2371 var width = this._getPageWidth(nextR);
2372 var middle = this.twoPage.middle;
2373 var top = this.twoPageTop();
2374 var scaledW = this.twoPage.height*width/height;
2376 var gutter = middle + this.gutterOffsetForIndex(nextL);
2378 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
2379 $(this.prefetchedImgs[nextR]).css({
2380 position: 'absolute',
2383 backgroundColor: this.getPageBackgroundColor(nextR),
2384 height: this.twoPage.height,
2385 width: scaledW+'px',
2386 borderLeft: '1px solid black',
2390 $('#BRtwopageview').append(this.prefetchedImgs[nextR]);
2392 height = this._getPageHeight(nextL);
2393 width = this._getPageWidth(nextL);
2394 scaledW = this.twoPage.height*width/height;
2396 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#BRcontainer').width()-gutter);
2397 $(this.prefetchedImgs[nextL]).css({
2398 position: 'absolute',
2399 right: $('#BRtwopageview').attr('clientWidth')-gutter+'px',
2401 backgroundColor: this.getPageBackgroundColor(nextL),
2402 height: this.twoPage.height,
2403 width: 0+'px', // Start at 0 width, then grow to the left
2404 borderRight: '1px solid black',
2408 $('#BRtwopageview').append(this.prefetchedImgs[nextL]);
2412 // getNextLeafs() -- NOT RTL AWARE
2413 //______________________________________________________________________________
2414 // BookReader.prototype.getNextLeafs = function(o) {
2415 // //TODO: we might have two left or two right leafs in a row (damaged book)
2416 // //For now, assume that leafs are contiguous.
2418 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2419 // o.L = this.twoPage.currentIndexL+2;
2420 // o.R = this.twoPage.currentIndexL+3;
2423 // getprevLeafs() -- NOT RTL AWARE
2424 //______________________________________________________________________________
2425 // BookReader.prototype.getPrevLeafs = function(o) {
2426 // //TODO: we might have two left or two right leafs in a row (damaged book)
2427 // //For now, assume that leafs are contiguous.
2429 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2430 // o.L = this.twoPage.currentIndexL-2;
2431 // o.R = this.twoPage.currentIndexL-1;
2434 // pruneUnusedImgs()
2435 //______________________________________________________________________________
2436 BookReader.prototype.pruneUnusedImgs = function() {
2437 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2438 for (var key in this.prefetchedImgs) {
2439 //console.log('key is ' + key);
2440 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2441 //console.log('removing key '+ key);
2442 $(this.prefetchedImgs[key]).remove();
2444 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2445 //console.log('deleting key '+ key);
2446 delete this.prefetchedImgs[key];
2452 //______________________________________________________________________________
2453 BookReader.prototype.prefetch = function() {
2455 // $$$ We should check here if the current indices have finished
2456 // loading (with some timeout) before loading more page images
2457 // See https://bugs.edge.launchpad.net/bookreader/+bug/511391
2459 // prefetch visible pages first
2460 this.prefetchImg(this.twoPage.currentIndexL);
2461 this.prefetchImg(this.twoPage.currentIndexR);
2463 var adjacentPagesToLoad = 3;
2465 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2466 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2468 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2469 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2471 // Load images spreading out from current
2472 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2473 var goingDown = lowCurrent - i;
2474 if (goingDown >= start) {
2475 this.prefetchImg(goingDown);
2477 var goingUp = highCurrent + i;
2478 if (goingUp <= end) {
2479 this.prefetchImg(goingUp);
2484 var lim = this.twoPage.currentIndexL-4;
2486 lim = Math.max(lim, 0);
2487 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2488 this.prefetchImg(i);
2491 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2492 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2493 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2494 this.prefetchImg(i);
2500 // getPageWidth2UP()
2501 //______________________________________________________________________________
2502 BookReader.prototype.getPageWidth2UP = function(index) {
2503 // We return the width based on the dominant height
2504 var height = this._getPageHeight(index);
2505 var width = this._getPageWidth(index);
2506 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2510 //______________________________________________________________________________
2511 BookReader.prototype.search = function(term) {
2512 term = term.replace(/\//g, ' '); // strip slashes
2513 this.searchTerm = term;
2514 $('#BookReaderSearchScript').remove();
2515 var script = document.createElement("script");
2516 script.setAttribute('id', 'BookReaderSearchScript');
2517 script.setAttribute("type", "text/javascript");
2518 script.setAttribute("src", 'http://'+this.server+'/BookReader/flipbook_search_br.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=br.BRSearchCallback');
2519 document.getElementsByTagName('head')[0].appendChild(script);
2520 $('#BookReaderSearchBox').val(term);
2521 $('#BookReaderSearchResults').html('Searching...');
2524 // BRSearchCallback()
2525 //______________________________________________________________________________
2526 BookReader.prototype.BRSearchCallback = function(txt) {
2528 if (jQuery.browser.msie) {
2529 var dom=new ActiveXObject("Microsoft.XMLDOM");
2533 var parser = new DOMParser();
2534 var dom = parser.parseFromString(txt, "text/xml");
2537 $('#BookReaderSearchResults').empty();
2538 $('#BookReaderSearchResults').append('<ul>');
2540 for (var key in this.searchResults) {
2541 if (null != this.searchResults[key].div) {
2542 $(this.searchResults[key].div).remove();
2544 delete this.searchResults[key];
2547 var pages = dom.getElementsByTagName('PAGE');
2549 if (0 == pages.length) {
2550 // $$$ it would be nice to echo the (sanitized) search result here
2551 $('#BookReaderSearchResults').append('<li>No search results found</li>');
2553 for (var i = 0; i < pages.length; i++){
2554 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2557 var re = new RegExp (/_(\d{4})\.djvu/);
2558 var reMatch = re.exec(pages[i].getAttribute('file'));
2559 var index = parseInt(reMatch[1], 10);
2560 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2562 var children = pages[i].childNodes;
2564 for (var j=0; j<children.length; j++) {
2565 //console.log(j + ' - ' + children[j].nodeName);
2566 //console.log(children[j].firstChild.nodeValue);
2567 if ('CONTEXT' == children[j].nodeName) {
2568 context += children[j].firstChild.nodeValue;
2569 } else if ('WORD' == children[j].nodeName) {
2570 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2572 var index = this.leafNumToIndex(index);
2573 if (null != index) {
2574 //coordinates are [left, bottom, right, top, [baseline]]
2575 //we'll skip baseline for now...
2576 var coords = children[j].getAttribute('coords').split(',',4);
2577 if (4 == coords.length) {
2578 this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
2583 var pageName = this.getPageName(index);
2584 var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
2585 var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
2586 //TODO: remove hardcoded instance name
2587 $('#BookReaderSearchResults').append('<li><b><a href="javascript:br.jumpToIndex('+index+','+middleX+','+middleY+');">' + pageName + '</a></b> - ' + context + '</li>');
2590 $('#BookReaderSearchResults').append('</ul>');
2592 // $$$ update again for case of loading search URL in new browser window (search box may not have been ready yet)
2593 $('#BookReaderSearchBox').val(this.searchTerm);
2595 this.updateSearchHilites();
2598 // updateSearchHilites()
2599 //______________________________________________________________________________
2600 BookReader.prototype.updateSearchHilites = function() {
2601 if (2 == this.mode) {
2602 this.updateSearchHilites2UP();
2604 this.updateSearchHilites1UP();
2608 // showSearchHilites1UP()
2609 //______________________________________________________________________________
2610 BookReader.prototype.updateSearchHilites1UP = function() {
2612 for (var key in this.searchResults) {
2614 if (jQuery.inArray(parseInt(key), this.displayedIndices) >= 0) {
2615 var result = this.searchResults[key];
2616 if (null == result.div) {
2617 result.div = document.createElement('div');
2618 $(result.div).attr('className', 'BookReaderSearchHilite').appendTo('#pagediv'+key);
2619 //console.log('appending ' + key);
2622 width: (result.r-result.l)/this.reduce + 'px',
2623 height: (result.b-result.t)/this.reduce + 'px',
2624 left: (result.l)/this.reduce + 'px',
2625 top: (result.t)/this.reduce +'px'
2629 //console.log(key + ' not displayed');
2630 this.searchResults[key].div=null;
2636 //______________________________________________________________________________
2637 // Returns the position of the gutter (line between the page images)
2638 BookReader.prototype.twoPageGutter = function() {
2639 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2643 //______________________________________________________________________________
2644 // Returns the offset for the top of the page images
2645 BookReader.prototype.twoPageTop = function() {
2646 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2649 // twoPageCoverWidth()
2650 //______________________________________________________________________________
2651 // Returns the width of the cover div given the total page width
2652 BookReader.prototype.twoPageCoverWidth = function(totalPageWidth) {
2653 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2656 // twoPageGetViewCenter()
2657 //______________________________________________________________________________
2658 // Returns the percentage offset into twopageview div at the center of container div
2659 // { percentageX: float, percentageY: float }
2660 BookReader.prototype.twoPageGetViewCenter = function() {
2663 var containerOffset = $('#BRcontainer').offset();
2664 var viewOffset = $('#BRtwopageview').offset();
2665 center.percentageX = (containerOffset.left - viewOffset.left + ($('#BRcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2666 center.percentageY = (containerOffset.top - viewOffset.top + ($('#BRcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2671 // twoPageCenterView(percentageX, percentageY)
2672 //______________________________________________________________________________
2673 // Centers the point given by percentage from left,top of twopageview
2674 BookReader.prototype.twoPageCenterView = function(percentageX, percentageY) {
2675 if ('undefined' == typeof(percentageX)) {
2678 if ('undefined' == typeof(percentageY)) {
2682 var viewWidth = $('#BRtwopageview').width();
2683 var containerClientWidth = $('#BRcontainer').attr('clientWidth');
2684 var intoViewX = percentageX * viewWidth;
2686 var viewHeight = $('#BRtwopageview').height();
2687 var containerClientHeight = $('#BRcontainer').attr('clientHeight');
2688 var intoViewY = percentageY * viewHeight;
2690 if (viewWidth < containerClientWidth) {
2691 // Can fit width without scrollbars - center by adjusting offset
2692 $('#BRtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2694 // Need to scroll to center
2695 $('#BRtwopageview').css('left', 0);
2696 $('#BRcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2699 if (viewHeight < containerClientHeight) {
2700 // Fits with scrollbars - add offset
2701 $('#BRtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2703 $('#BRtwopageview').css('top', 0);
2704 $('#BRcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2708 // twoPageFlipAreaHeight
2709 //______________________________________________________________________________
2710 // Returns the integer height of the click-to-flip areas at the edges of the book
2711 BookReader.prototype.twoPageFlipAreaHeight = function() {
2712 return parseInt(this.twoPage.height);
2715 // twoPageFlipAreaWidth
2716 //______________________________________________________________________________
2717 // Returns the integer width of the flip areas
2718 BookReader.prototype.twoPageFlipAreaWidth = function() {
2719 var max = 100; // $$$ TODO base on view width?
2722 var width = this.twoPage.width * 0.15;
2723 return parseInt(BookReader.util.clamp(width, min, max));
2726 // twoPageFlipAreaTop
2727 //______________________________________________________________________________
2728 // Returns integer top offset for flip areas
2729 BookReader.prototype.twoPageFlipAreaTop = function() {
2730 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2733 // twoPageLeftFlipAreaLeft
2734 //______________________________________________________________________________
2735 // Left offset for left flip area
2736 BookReader.prototype.twoPageLeftFlipAreaLeft = function() {
2737 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2740 // twoPageRightFlipAreaLeft
2741 //______________________________________________________________________________
2742 // Left offset for right flip area
2743 BookReader.prototype.twoPageRightFlipAreaLeft = function() {
2744 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2747 // twoPagePlaceFlipAreas
2748 //______________________________________________________________________________
2749 // Readjusts position of flip areas based on current layout
2750 BookReader.prototype.twoPagePlaceFlipAreas = function() {
2751 // We don't set top since it shouldn't change relative to view
2752 $(this.twoPage.leftFlipArea).css({
2753 left: this.twoPageLeftFlipAreaLeft() + 'px',
2754 width: this.twoPageFlipAreaWidth() + 'px'
2756 $(this.twoPage.rightFlipArea).css({
2757 left: this.twoPageRightFlipAreaLeft() + 'px',
2758 width: this.twoPageFlipAreaWidth() + 'px'
2762 // showSearchHilites2UP()
2763 //______________________________________________________________________________
2764 BookReader.prototype.updateSearchHilites2UP = function() {
2766 for (var key in this.searchResults) {
2767 key = parseInt(key, 10);
2768 if (jQuery.inArray(key, this.displayedIndices) >= 0) {
2769 var result = this.searchResults[key];
2770 if (null == result.div) {
2771 result.div = document.createElement('div');
2772 $(result.div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
2773 //console.log('appending ' + key);
2776 // We calculate the reduction factor for the specific page because it can be different
2777 // for each page in the spread
2778 var height = this._getPageHeight(key);
2779 var width = this._getPageWidth(key)
2780 var reduce = this.twoPage.height/height;
2781 var scaledW = parseInt(width*reduce);
2783 var gutter = this.twoPageGutter();
2785 if ('L' == this.getPageSide(key)) {
2786 pageL = gutter-scaledW;
2790 var pageT = this.twoPageTop();
2793 width: (result.r-result.l)*reduce + 'px',
2794 height: (result.b-result.t)*reduce + 'px',
2795 left: pageL+(result.l)*reduce + 'px',
2796 top: pageT+(result.t)*reduce +'px'
2800 //console.log(key + ' not displayed');
2801 if (null != this.searchResults[key].div) {
2802 //console.log('removing ' + key);
2803 $(this.searchResults[key].div).remove();
2805 this.searchResults[key].div=null;
2810 // removeSearchHilites()
2811 //______________________________________________________________________________
2812 BookReader.prototype.removeSearchHilites = function() {
2813 for (var key in this.searchResults) {
2814 if (null != this.searchResults[key].div) {
2815 $(this.searchResults[key].div).remove();
2816 this.searchResults[key].div=null;
2822 //______________________________________________________________________________
2823 BookReader.prototype.printPage = function() {
2824 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2826 /* iframe implementation
2828 if (null != this.printPopup) { // check if already showing
2831 this.printPopup = document.createElement("div");
2832 $(this.printPopup).css({
2833 position: 'absolute',
2835 left: ($('#BRcontainer').width()-400)/2 + 'px',
2838 border: "3px double #999999",
2840 backgroundColor: "#fff"
2841 }).appendTo('#BookReader');
2844 if (this.constMode1up == this.mode) {
2845 indexToPrint = this.firstIndex;
2847 indexToPrint = this.twoPage.currentIndexL;
2850 this.indexToPrint = indexToPrint;
2852 var htmlStr = '<div style="text-align: center;">';
2853 htmlStr = '<p style="text-align:center;"><b><a href="javascript:void(0);" onclick="window.frames[0].focus(); window.frames[0].print(); return false;">Click here to print this page</a></b></p>';
2854 htmlStr += '<div id="printDiv" name="printDiv" style="text-align: center; width: 233px; margin: auto">'
2855 htmlStr += '<p style="text-align:right; margin: 0; font-size: 0.85em">';
2856 //htmlStr += '<button class="BRicon rollover book_up" onclick="br.updatePrintFrame(-1); return false;"></button> ';
2857 //htmlStr += '<button class="BRicon rollover book_down" onclick="br.updatePrintFrame(1); return false;"></button>';
2858 htmlStr += '<a href="#" onclick="br.updatePrintFrame(-1); return false;">Prev</a> <a href="#" onclick="br.updatePrintFrame(1); return false;">Next</a>';
2860 htmlStr += '</div>';
2861 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.printPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2862 htmlStr += '</div>';
2864 this.printPopup.innerHTML = htmlStr;
2866 var iframe = document.createElement('iframe');
2867 iframe.id = 'printFrame';
2868 iframe.name = 'printFrame';
2869 iframe.width = '233px'; // 8.5 x 11 aspect
2870 iframe.height = '300px';
2872 var self = this; // closure
2874 $(iframe).load(function() {
2875 var doc = BookReader.util.getIFrameDocument(this);
2876 $('body', doc).html(self.getPrintFrameContent(self.indexToPrint));
2879 $('#printDiv').prepend(iframe);
2883 // Get print URI from current indices and mode
2884 BookReader.prototype.getPrintURI = function() {
2886 if (this.constMode2up == this.mode) {
2887 indexToPrint = this.twoPage.currentIndexL;
2889 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2892 var options = 'id=' + this.bookId + '&server=' + this.server + '&zip=' + this.zip
2893 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2894 + '&width=' + this._getPageWidth(indexToPrint) + '&height=' + this._getPageHeight(indexToPrint);
2896 if (this.constMode2up == this.mode) {
2897 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this._getPageWidth(this.twoPage.currentIndexR);
2898 options += '&height2=' + this._getPageHeight(this.twoPage.currentIndexR);
2899 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2901 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2904 return '/bookreader/print.php?' + options;
2907 /* iframe implementation
2908 BookReader.prototype.getPrintFrameContent = function(index) {
2909 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2910 // 8.5x11 so we should end up not overflowing on either paper size.
2911 var paperAspect = 8.5 / 11;
2912 var imageAspect = this._getPageWidth(index) / this._getPageHeight(index);
2916 // Rotate if possible and appropriate, to get larger image size on printed page
2917 if (this.canRotatePage(index)) {
2918 if (imageAspect > 1 && imageAspect > paperAspect) {
2919 // more wide than square, and more wide than paper
2921 imageAspect = 1/imageAspect;
2926 if (imageAspect > paperAspect) {
2927 // wider than paper, fit width
2928 fitAttrs = 'width="95%"';
2930 // taller than paper, fit height
2931 fitAttrs = 'height="95%"';
2934 var imageURL = this._getPageURI(index, 1, rotate);
2935 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2936 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2937 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2938 iframeStr += '</div>';
2939 iframeStr += '</body></html>';
2944 BookReader.prototype.updatePrintFrame = function(delta) {
2945 var newIndex = this.indexToPrint + delta;
2946 newIndex = BookReader.util.clamp(newIndex, 0, this.numLeafs - 1);
2947 if (newIndex == this.indexToPrint) {
2950 this.indexToPrint = newIndex;
2951 var doc = BookReader.util.getIFrameDocument($('#printFrame')[0]);
2952 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2957 //______________________________________________________________________________
2958 BookReader.prototype.showEmbedCode = function() {
2959 if (null != this.embedPopup) { // check if already showing
2963 this.embedPopup = document.createElement("div");
2964 $(this.embedPopup).css({
2965 position: 'absolute',
2967 left: ($('#BRcontainer').attr('clientWidth')-400)/2 + 'px',
2970 border: "3px double #999999",
2972 backgroundColor: "#fff"
2973 }).appendTo('#BookReader');
2975 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
2976 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>';
2977 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
2978 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2980 this.embedPopup.innerHTML = htmlStr;
2981 $(this.embedPopup).find('input').bind('click', function() {
2987 //______________________________________________________________________________
2988 BookReader.prototype.autoToggle = function() {
2990 var bComingFrom1up = false;
2991 if (2 != this.mode) {
2992 bComingFrom1up = true;
2996 // Change to autofit if book is too large
2997 if (this.reduce < this.twoPageGetAutofitReduce()) {
2998 this.zoom2up('auto');
3002 if (null == this.autoTimer) {
3003 this.flipSpeed = 2000;
3005 // $$$ Draw events currently cause layout problems when they occur during animation.
3006 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
3007 // we workaround for now by not triggering immediate animation in that case.
3008 // See https://bugs.launchpad.net/gnubook/+bug/328327
3009 if (('rl' == this.pageProgression) && bComingFrom1up) {
3010 // don't flip immediately -- wait until timer fires
3013 this.flipFwdToIndex();
3016 $('#BRtoolbar .play').hide();
3017 $('#BRtoolbar .pause').show();
3018 this.autoTimer=setInterval(function(){
3019 if (self.animating) {return;}
3021 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
3022 self.flipBackToIndex(1); // $$$ really what we want?
3024 self.flipFwdToIndex();
3033 //______________________________________________________________________________
3034 // Stop autoplay mode, allowing animations to finish
3035 BookReader.prototype.autoStop = function() {
3036 if (null != this.autoTimer) {
3037 clearInterval(this.autoTimer);
3038 this.flipSpeed = 'fast';
3039 $('#BRtoolbar .pause').hide();
3040 $('#BRtoolbar .play').show();
3041 this.autoTimer = null;
3045 // stopFlipAnimations
3046 //______________________________________________________________________________
3047 // Immediately stop flip animations. Callbacks are triggered.
3048 BookReader.prototype.stopFlipAnimations = function() {
3050 this.autoStop(); // Clear timers
3052 // Stop animation, clear queue, trigger callbacks
3053 if (this.leafEdgeTmp) {
3054 $(this.leafEdgeTmp).stop(false, true);
3056 jQuery.each(this.prefetchedImgs, function() {
3057 $(this).stop(false, true);
3060 // And again since animations also queued in callbacks
3061 if (this.leafEdgeTmp) {
3062 $(this.leafEdgeTmp).stop(false, true);
3064 jQuery.each(this.prefetchedImgs, function() {
3065 $(this).stop(false, true);
3070 // keyboardNavigationIsDisabled(event)
3071 // - returns true if keyboard navigation should be disabled for the event
3072 //______________________________________________________________________________
3073 BookReader.prototype.keyboardNavigationIsDisabled = function(event) {
3074 if (event.target.tagName == "INPUT") {
3080 // gutterOffsetForIndex
3081 //______________________________________________________________________________
3083 // Returns the gutter offset for the spread containing the given index.
3084 // This function supports RTL
3085 BookReader.prototype.gutterOffsetForIndex = function(pindex) {
3087 // To find the offset of the gutter from the middle we calculate our percentage distance
3088 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
3089 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
3091 // But then again for RTL it's the opposite
3092 if ('rl' == this.pageProgression) {
3100 //______________________________________________________________________________
3101 // Returns the width of the leaf edge div for the page with index given
3102 BookReader.prototype.leafEdgeWidth = function(pindex) {
3103 // $$$ could there be single pixel rounding errors for L vs R?
3104 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
3105 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3107 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3111 // jumpIndexForLeftEdgePageX
3112 //______________________________________________________________________________
3113 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
3114 BookReader.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
3115 if ('rl' != this.pageProgression) {
3116 // LTR - flipping backward
3117 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3119 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
3120 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
3124 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3125 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
3130 // jumpIndexForRightEdgePageX
3131 //______________________________________________________________________________
3132 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
3133 BookReader.prototype.jumpIndexForRightEdgePageX = function(pageX) {
3134 if ('rl' != this.pageProgression) {
3136 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
3137 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
3140 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
3141 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
3146 BookReader.prototype.initToolbar = function(mode, ui) {
3148 $("#BookReader").append("<div id='BRtoolbar'>"
3149 + "<span id='BRtoolbarbuttons' style='float: right'>"
3150 + "<button class='BRicon print rollover' /> <button class='BRicon rollover embed' />"
3151 + "<form class='BRpageform' action='javascript:' onsubmit='br.jumpToPage(this.elements[0].value)'> <span class='label'>Page:<input id='BRpagenum' type='text' size='3' onfocus='br.autoStop();'></input></span></form>"
3152 + "<div class='BRtoolbarmode2' style='display: none'><button class='BRicon rollover book_leftmost' /><button class='BRicon rollover book_left' /><button class='BRicon rollover book_right' /><button class='BRicon rollover book_rightmost' /></div>"
3153 + "<div class='BRtoolbarmode1' style='display: none'><button class='BRicon rollover book_top' /><button class='BRicon rollover book_up' /> <button class='BRicon rollover book_down' /><button class='BRicon rollover book_bottom' /></div>"
3154 + "<div class='BRtoolbarmode3' style='display: none'><button class='BRicon rollover book_top' /><button class='BRicon rollover book_up' /> <button class='BRicon rollover book_down' /><button class='BRicon rollover book_bottom' /></div>"
3155 + "<button class='BRicon rollover play' /><button class='BRicon rollover pause' style='display: none' />"
3159 + "<a class='BRicon logo rollover' href='" + this.logoURL + "'> </a>"
3160 + " <button class='BRicon rollover zoom_out' onclick='br.zoom(-1); return false;'/>"
3161 + "<button class='BRicon rollover zoom_in' onclick='br.zoom(1); return false;'/>"
3162 + " <span class='label'>Zoom: <span id='BRzoom'>"+parseInt(100/this.reduce)+"</span></span>"
3163 + " <button class='BRicon rollover one_page_mode' onclick='br.switchMode(1); return false;'/>"
3164 + " <button class='BRicon rollover two_page_mode' onclick='br.switchMode(2); return false;'/>"
3165 + " <button class='BRicon rollover thumbnail_mode' onclick='br.switchMode(3); return false;'/>"
3168 + "<span id='#BRbooktitle'>"
3169 + " <a class='BRblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
3173 this.updateToolbarZoom(this.reduce); // Pretty format
3175 if (ui == "embed" || ui == "touch") {
3176 $("#BookReader a.logo").attr("target","_blank");
3179 // $$$ turn this into a member variable
3180 var jToolbar = $('#BRtoolbar'); // j prefix indicates jQuery object
3182 // We build in mode 2
3185 this.bindToolbarNavHandlers(jToolbar);
3187 // Setup tooltips -- later we could load these from a file for i18n
3188 var titles = { '.logo': 'Go to Archive.org',
3189 '.zoom_in': 'Zoom in',
3190 '.zoom_out': 'Zoom out',
3191 '.one_page_mode': 'One-page view',
3192 '.two_page_mode': 'Two-page view',
3193 '.thumbnail_mode': 'Thumbnail view',
3194 '.print': 'Print this page',
3195 '.embed': 'Embed bookreader',
3196 '.book_left': 'Flip left',
3197 '.book_right': 'Flip right',
3198 '.book_up': 'Page up',
3199 '.book_down': 'Page down',
3202 '.book_top': 'First page',
3203 '.book_bottom': 'Last page'
3205 if ('rl' == this.pageProgression) {
3206 titles['.book_leftmost'] = 'Last page';
3207 titles['.book_rightmost'] = 'First page';
3209 titles['.book_leftmost'] = 'First page';
3210 titles['.book_rightmost'] = 'Last page';
3213 for (var icon in titles) {
3214 jToolbar.find(icon).attr('title', titles[icon]);
3217 // Hide mode buttons and autoplay if 2up is not available
3218 // $$$ if we end up with more than two modes we should show the applicable buttons
3219 if ( !this.canSwitchToMode(this.constMode2up) ) {
3220 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
3223 // Switch to requested mode -- binds other click handlers
3224 this.switchToolbarMode(mode);
3229 // switchToolbarMode
3230 //______________________________________________________________________________
3231 // Update the toolbar for the given mode (changes navigation buttons)
3232 // $$$ we should soon split the toolbar out into its own module
3233 BookReader.prototype.switchToolbarMode = function(mode) {
3236 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3237 $('#BRtoolbar .BRtoolbarmode2').hide();
3238 $('#BRtoolbar .BRtoolbarmode3').hide();
3239 $('#BRtoolbar .BRtoolbarmode1').show().css('display', 'inline');
3240 } else if (2 == mode) {
3242 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3243 $('#BRtoolbar .BRtoolbarmode1').hide();
3244 $('#BRtoolbar .BRtoolbarmode3').hide();
3245 $('#BRtoolbar .BRtoolbarmode2').show().css('display', 'inline');
3248 $('#BRtoolbar .BRtoolbarzoom').hide();
3249 $('#BRtoolbar .BRtoolbarmode2').hide();
3250 $('#BRtoolbar .BRtoolbarmode1').hide();
3251 $('#BRtoolbar .BRtoolbarmode3').show().css('display', 'inline');
3255 // bindToolbarNavHandlers
3256 //______________________________________________________________________________
3257 // Binds the toolbar handlers
3258 BookReader.prototype.bindToolbarNavHandlers = function(jToolbar) {
3260 var self = this; // closure
3262 jToolbar.find('.book_left').bind('click', function(e) {
3267 jToolbar.find('.book_right').bind('click', function(e) {
3272 jToolbar.find('.book_up').bind('click', function(e) {
3273 if ($.inArray(self.mode, [self.constMode2up, self.constModeThumb]) >= 0) {
3281 jToolbar.find('.book_down').bind('click', function(e) {
3282 if ($.inArray(self.mode, [self.constMode2up, self.constModeThumb]) >= 0) {
3290 jToolbar.find('.print').bind('click', function(e) {
3295 jToolbar.find('.embed').bind('click', function(e) {
3296 self.showEmbedCode();
3300 jToolbar.find('.play').bind('click', function(e) {
3305 jToolbar.find('.pause').bind('click', function(e) {
3310 jToolbar.find('.book_top').bind('click', function(e) {
3315 jToolbar.find('.book_bottom').bind('click', function(e) {
3320 jToolbar.find('.book_leftmost').bind('click', function(e) {
3325 jToolbar.find('.book_rightmost').bind('click', function(e) {
3331 // updateToolbarZoom(reduce)
3332 //______________________________________________________________________________
3333 // Update the displayed zoom factor based on reduction factor
3334 BookReader.prototype.updateToolbarZoom = function(reduce) {
3338 // $$$ TODO preserve zoom/fit for each mode
3339 if (this.mode == this.constMode2up) {
3340 autofit = this.twoPage.autofit;
3342 autofit = this.autofit;
3346 value = autofit[0].toUpperCase() + autofit.slice(1);
3348 value = (100 / reduce).toFixed(2);
3349 // Strip trailing zeroes and decimal if all zeroes
3350 value = value.replace(/0+$/,'');
3351 value = value.replace(/\.$/,'');
3354 $('#BRzoom').text(value);
3357 // firstDisplayableIndex
3358 //______________________________________________________________________________
3359 // Returns the index of the first visible page, dependent on the mode.
3360 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3361 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
3362 BookReader.prototype.firstDisplayableIndex = function() {
3363 if (this.mode != this.constMode2up) {
3367 if ('rl' != this.pageProgression) {
3369 if (this.getPageSide(0) == 'L') {
3376 if (this.getPageSide(0) == 'R') {
3384 // lastDisplayableIndex
3385 //______________________________________________________________________________
3386 // Returns the index of the last visible page, dependent on the mode.
3387 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3388 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
3389 BookReader.prototype.lastDisplayableIndex = function() {
3391 var lastIndex = this.numLeafs - 1;
3393 if (this.mode != this.constMode2up) {
3397 if ('rl' != this.pageProgression) {
3399 if (this.getPageSide(lastIndex) == 'R') {
3402 return lastIndex + 1;
3406 if (this.getPageSide(lastIndex) == 'L') {
3409 return lastIndex + 1;
3414 // shortTitle(maximumCharacters)
3416 // Returns a shortened version of the title with the maximum number of characters
3417 BookReader.prototype.shortTitle = function(maximumCharacters) {
3418 if (this.bookTitle.length < maximumCharacters) {
3419 return this.bookTitle;
3422 var title = this.bookTitle.substr(0, maximumCharacters - 3);
3427 // Parameter related functions
3429 // updateFromParams(params)
3431 // Update ourselves from the params object.
3433 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
3434 BookReader.prototype.updateFromParams = function(params) {
3435 if ('undefined' != typeof(params.mode)) {
3436 this.switchMode(params.mode);
3440 if ('undefined' != typeof(params.searchTerm)) {
3441 if (this.searchTerm != params.searchTerm) {
3442 this.search(params.searchTerm);
3446 // $$$ process /zoom
3448 // We only respect page if index is not set
3449 if ('undefined' != typeof(params.index)) {
3450 if (params.index != this.currentIndex()) {
3451 this.jumpToIndex(params.index);
3453 } else if ('undefined' != typeof(params.page)) {
3454 // $$$ this assumes page numbers are unique
3455 if (params.page != this.getPageNum(this.currentIndex())) {
3456 this.jumpToPage(params.page);
3460 // $$$ process /region
3461 // $$$ process /highlight
3464 // paramsFromFragment(urlFragment)
3466 // Returns a object with configuration parametes from a URL fragment.
3468 // E.g paramsFromFragment(window.location.hash)
3469 BookReader.prototype.paramsFromFragment = function(urlFragment) {
3470 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
3474 // For convenience we allow an initial # character (as from window.location.hash)
3475 // but don't require it
3476 if (urlFragment.substr(0,1) == '#') {
3477 urlFragment = urlFragment.substr(1);
3480 // Simple #nn syntax
3481 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3482 if ( !isNaN(oldStyleLeafNum) ) {
3483 params.index = oldStyleLeafNum;
3485 // Done processing if using old-style syntax
3489 // Split into key-value pairs
3490 var urlArray = urlFragment.split('/');
3492 for (var i = 0; i < urlArray.length; i += 2) {
3493 urlHash[urlArray[i]] = urlArray[i+1];
3497 if ('1up' == urlHash['mode']) {
3498 params.mode = this.constMode1up;
3499 } else if ('2up' == urlHash['mode']) {
3500 params.mode = this.constMode2up;
3501 } else if ('thumb' == urlHash['mode']) {
3502 params.mode = this.constModeThumb;
3506 if ('undefined' != typeof(urlHash['page'])) {
3507 // page was set -- may not be int
3508 params.page = urlHash['page'];
3511 // $$$ process /region
3512 // $$$ process /search
3514 if (urlHash['search'] != undefined) {
3515 params.searchTerm = BookReader.util.decodeURIComponentPlus(urlHash['search']);
3518 // $$$ process /highlight
3523 // paramsFromCurrent()
3525 // Create a params object from the current parameters.
3526 BookReader.prototype.paramsFromCurrent = function() {
3530 var index = this.currentIndex();
3531 var pageNum = this.getPageNum(index);
3532 if ((pageNum === 0) || pageNum) {
3533 params.page = pageNum;
3536 params.index = index;
3537 params.mode = this.mode;
3543 if (this.searchHighlightVisible()) {
3544 params.searchTerm = this.searchTerm;
3550 // fragmentFromParams(params)
3552 // Create a fragment string from the params object.
3553 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3554 BookReader.prototype.fragmentFromParams = function(params) {
3555 var separator = '/';
3559 if ('undefined' != typeof(params.page)) {
3560 fragments.push('page', params.page);
3562 // Don't have page numbering -- use index instead
3563 fragments.push('page', 'n' + params.index);
3570 if ('undefined' != typeof(params.mode)) {
3571 if (params.mode == this.constMode1up) {
3572 fragments.push('mode', '1up');
3573 } else if (params.mode == this.constMode2up) {
3574 fragments.push('mode', '2up');
3575 } else if (params.mode == this.constModeThumb) {
3576 fragments.push('mode', 'thumb');
3578 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3583 if (params.searchTerm) {
3584 fragments.push('search', params.searchTerm);
3587 return BookReader.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3590 // getPageIndex(pageNum)
3592 // Returns the *highest* index the given page number, or undefined
3593 BookReader.prototype.getPageIndex = function(pageNum) {
3594 var pageIndices = this.getPageIndices(pageNum);
3596 if (pageIndices.length > 0) {
3597 return pageIndices[pageIndices.length - 1];
3603 // getPageIndices(pageNum)
3605 // Returns an array (possibly empty) of the indices with the given page number
3606 BookReader.prototype.getPageIndices = function(pageNum) {
3609 // Check for special "nXX" page number
3610 if (pageNum.slice(0,1) == 'n') {
3612 var pageIntStr = pageNum.slice(1, pageNum.length);
3613 var pageIndex = parseInt(pageIntStr);
3614 indices.push(pageIndex);
3617 // Do nothing... will run through page names and see if one matches
3622 for (i=0; i<this.numLeafs; i++) {
3623 if (this.getPageNum(i) == pageNum) {
3631 // getPageName(index)
3633 // Returns the name of the page as it should be displayed in the user interface
3634 BookReader.prototype.getPageName = function(index) {
3635 return 'Page ' + this.getPageNum(index);
3638 // updateLocationHash
3640 // Update the location hash from the current parameters. Call this instead of manually
3641 // using window.location.replace
3642 BookReader.prototype.updateLocationHash = function() {
3643 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3644 window.location.replace(newHash);
3646 // This is the variable checked in the timer. Only user-generated changes
3647 // to the URL will trigger the event.
3648 this.oldLocationHash = newHash;
3651 // startLocationPolling
3653 // Starts polling of window.location to see hash fragment changes
3654 BookReader.prototype.startLocationPolling = function() {
3655 var self = this; // remember who I am
3656 self.oldLocationHash = window.location.hash;
3658 if (this.locationPollId) {
3659 clearInterval(this.locationPollID);
3660 this.locationPollId = null;
3663 this.locationPollId = setInterval(function() {
3664 var newHash = window.location.hash;
3665 if (newHash != self.oldLocationHash) {
3666 if (newHash != self.oldUserHash) { // Only process new user hash once
3667 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3669 // Queue change if animating
3670 if (self.animating) {
3672 self.animationFinishedCallback = function() {
3673 self.updateFromParams(self.paramsFromFragment(newHash));
3675 } else { // update immediately
3676 self.updateFromParams(self.paramsFromFragment(newHash));
3678 self.oldUserHash = newHash;
3686 // Returns true if we can switch to the requested mode
3687 BookReader.prototype.canSwitchToMode = function(mode) {
3688 if (mode == this.constMode2up) {
3689 // check there are enough pages to display
3690 // $$$ this is a workaround for the mis-feature that we can't display
3691 // short books in 2up mode
3692 if (this.numLeafs < 6) {
3700 // searchHighlightVisible
3702 // Returns true if a search highlight is currently being displayed
3703 BookReader.prototype.searchHighlightVisible = function() {
3704 if (this.constMode2up == this.mode) {
3705 if (this.searchResults[this.twoPage.currentIndexL]
3706 || this.searchResults[this.twoPage.currentIndexR]) {
3710 if (this.searchResults[this.currentIndex()]) {
3717 // getPageBackgroundColor
3719 // Returns a CSS property string for the background color for the given page
3720 // $$$ turn into regular CSS?
3721 BookReader.prototype.getPageBackgroundColor = function(index) {
3722 if (index >= 0 && index < this.numLeafs) {
3724 return this.pageDefaultBackgroundColor;
3732 // Returns the page width for the given index, or first or last page if out of range
3733 BookReader.prototype._getPageWidth = function(index) {
3734 // Synthesize a page width for pages not actually present in book.
3735 // May or may not be the best approach.
3736 // If index is out of range we return the width of first or last page
3737 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3738 return this.getPageWidth(index);
3743 // Returns the page height for the given index, or first or last page if out of range
3744 BookReader.prototype._getPageHeight= function(index) {
3745 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3746 return this.getPageHeight(index);
3751 // Returns the page URI or transparent image if out of range
3752 BookReader.prototype._getPageURI = function(index, reduce, rotate) {
3753 if (index < 0 || index >= this.numLeafs) { // Synthesize page
3754 return this.imagesBaseURL + "/transparent.png";
3757 if ('undefined' == typeof(reduce)) {
3758 // reduce not passed in
3759 // $$$ this probably won't work for thumbnail mode
3760 var ratio = this.getPageHeight(index) / this.twoPage.height;
3762 // $$$ we make an assumption here that the scales are available pow2 (like kakadu)
3765 } else if (ratio < 4) {
3767 } else if (ratio < 8) {
3769 } else if (ratio < 16) {
3771 } else if (ratio < 32) {
3779 return this.getPageURI(index, reduce, rotate);
3782 // Library functions
3784 disableSelect: function(jObject) {
3785 // Bind mouse handlers
3786 // Disable mouse click to avoid selected/highlighted page images - bug 354239
3787 jObject.bind('mousedown', function(e) {
3788 // $$$ check here for right-click and don't disable. Also use jQuery style
3789 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
3792 // Special hack for IE7
3793 jObject[0].onselectstart = function(e) { return false; };
3796 clamp: function(value, min, max) {
3797 return Math.min(Math.max(value, min), max);
3800 notInArray: function(value, array) {
3801 // inArray returns -1 or undefined if value not in array
3802 return ! (jQuery.inArray(value, array) >= 0);
3805 getIFrameDocument: function(iframe) {
3806 // Adapted from http://xkr.us/articles/dom/iframe-document/
3807 var outer = (iframe.contentWindow || iframe.contentDocument);
3808 return (outer.document || outer);
3811 decodeURIComponentPlus: function(value) {
3812 // Decodes a URI component and converts '+' to ' '
3813 return decodeURIComponent(value).replace(/\+/g, ' ');
3816 encodeURIComponentPlus: function(value) {
3817 // Encodes a URI component and converts ' ' to '+'
3818 return encodeURIComponent(value).replace(/%20/g, '+');
3820 // The final property here must NOT have a comma after it - IE7