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 // Text-to-Speech params
108 this.ttsPosition = -1;
114 //______________________________________________________________________________
115 BookReader.prototype.init = function() {
117 var startIndex = undefined;
118 this.pageScale = this.reduce; // preserve current reduce
120 // Find start index and mode if set in location hash
121 var params = this.paramsFromFragment(window.location.hash);
123 if ('undefined' != typeof(params.index)) {
124 startIndex = params.index;
125 } else if ('undefined' != typeof(params.page)) {
126 startIndex = this.getPageIndex(params.page);
129 if ('undefined' == typeof(startIndex)) {
130 if ('undefined' != typeof(this.titleLeaf)) {
131 startIndex = this.leafNumToIndex(this.titleLeaf);
135 if ('undefined' == typeof(startIndex)) {
139 if ('undefined' != typeof(params.mode)) {
140 this.mode = params.mode;
143 // Set document title -- may have already been set in enclosing html for
144 // search engine visibility
145 document.title = this.shortTitle(50);
147 // Sanitize parameters
148 if ( !this.canSwitchToMode( this.mode ) ) {
149 this.mode = this.constMode1up;
152 $("#BookReader").empty();
154 this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
155 $("#BookReader").append("<div id='BRcontainer'></div>");
156 $("#BRcontainer").append("<div id='BRpageview'></div>");
158 $("#BRcontainer").bind('scroll', this, function(e) {
162 this.setupKeyListeners();
163 this.startLocationPolling();
165 $(window).bind('resize', this, function(e) {
166 //console.log('resize!');
167 if (1 == e.data.mode) {
168 //console.log('centering 1page view');
169 if (e.data.autofit) {
170 e.data.resizePageView();
172 e.data.centerPageView();
173 $('#BRpageview').empty()
174 e.data.displayedIndices = [];
175 e.data.updateSearchHilites(); //deletes hilights but does not call remove()
177 } else if (3 == e.data.mode){
178 e.data.prepareThumbnailView();
180 //console.log('drawing 2 page view');
182 // We only need to prepare again in autofit (size of spread changes)
183 if (e.data.twoPage.autofit) {
184 e.data.prepareTwoPageView();
186 // Re-center if the scrollbars have disappeared
187 var center = e.data.twoPageGetViewCenter();
188 var doRecenter = false;
189 if (e.data.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
190 center.percentageX = 0.5;
193 if (e.data.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
194 center.percentageY = 0.5;
198 e.data.twoPageCenterView(center.percentageX, center.percentageY);
204 $('.BRpagediv1up').bind('mousedown', this, function(e) {
205 // $$$ the purpose of this is to disable selection of the image (makes it turn blue)
206 // but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
210 // $$$ refactor this so it's enough to set the first index and call preparePageView
211 // (get rid of mode-specific logic at this point)
212 if (1 == this.mode) {
213 this.firstIndex = startIndex;
214 this.prepareOnePageView();
215 this.jumpToIndex(startIndex);
216 } else if (3 == this.mode) {
217 this.firstIndex = startIndex;
218 this.prepareThumbnailView();
219 this.jumpToIndex(startIndex);
221 //this.resizePageView();
223 this.displayedIndices=[0];
224 this.firstIndex = startIndex;
225 this.displayedIndices = [this.firstIndex];
226 //console.log('titleLeaf: %d', this.titleLeaf);
227 //console.log('displayedIndices: %s', this.displayedIndices);
228 this.prepareTwoPageView();
231 // Enact other parts of initial params
232 this.updateFromParams(params);
235 BookReader.prototype.setupKeyListeners = function() {
248 // We use document here instead of window to avoid a bug in jQuery on IE7
249 $(document).keydown(function(e) {
251 // Keyboard navigation
252 if (!self.keyboardNavigationIsDisabled(e)) {
256 // In 1up mode page scrolling is handled by browser
257 if (2 == self.mode) {
264 if (2 == self.mode) {
278 if (2 == self.mode) {
284 if (2 == self.mode) {
295 //______________________________________________________________________________
296 BookReader.prototype.drawLeafs = function() {
297 if (1 == this.mode) {
298 this.drawLeafsOnePage();
299 } else if (3 == this.mode) {
300 this.drawLeafsThumbnail();
302 this.drawLeafsTwoPage();
307 // bindGestures(jElement)
308 //______________________________________________________________________________
309 BookReader.prototype.bindGestures = function(jElement) {
311 jElement.unbind('gesturechange').bind('gesturechange', function(e) {
313 if (e.originalEvent.scale > 1.5) {
315 } else if (e.originalEvent.scale < 0.6) {
322 BookReader.prototype.setClickHandler2UP = function( element, data, handler) {
323 //console.log('setting handler');
324 //console.log(element.tagName);
326 $(element).unbind('tap').bind('tap', data, function(e) {
331 // drawLeafsOnePage()
332 //______________________________________________________________________________
333 BookReader.prototype.drawLeafsOnePage = function() {
334 //alert('drawing leafs!');
338 var scrollTop = $('#BRcontainer').attr('scrollTop');
339 var scrollBottom = scrollTop + $('#BRcontainer').height();
340 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
342 var indicesToDisplay = [];
347 for (i=0; i<this.numLeafs; i++) {
348 var height = parseInt(this._getPageHeight(i)/this.reduce);
350 leafBottom += height;
351 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
352 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
353 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
354 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
355 if (topInView | bottomInView | middleInView) {
356 //console.log('displayed: ' + this.displayedIndices);
357 //console.log('to display: ' + i);
358 indicesToDisplay.push(i);
360 leafTop += height +10;
364 var firstIndexToDraw = indicesToDisplay[0];
365 this.firstIndex = firstIndexToDraw;
367 // Update hash, but only if we're currently displaying a leaf
368 // Hack that fixes #365790
369 if (this.displayedIndices.length > 0) {
370 this.updateLocationHash();
373 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
375 indicesToDisplay.unshift(firstIndexToDraw);
378 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
379 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
380 indicesToDisplay.push(lastIndexToDraw+1);
385 for (i=0; i<firstIndexToDraw; i++) {
386 leafTop += parseInt(this._getPageHeight(i)/this.reduce) +10;
389 //var viewWidth = $('#BRpageview').width(); //includes scroll bar width
390 var viewWidth = $('#BRcontainer').attr('scrollWidth');
393 for (i=0; i<indicesToDisplay.length; i++) {
394 var index = indicesToDisplay[i];
395 var height = parseInt(this._getPageHeight(index)/this.reduce);
397 if (BookReader.util.notInArray(indicesToDisplay[i], this.displayedIndices)) {
398 var width = parseInt(this._getPageWidth(index)/this.reduce);
399 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
400 var div = document.createElement("div");
401 div.className = 'BRpagediv1up';
402 div.id = 'pagediv'+index;
403 div.style.position = "absolute";
404 $(div).css('top', leafTop + 'px');
405 var left = (viewWidth-width)>>1;
406 if (left<0) left = 0;
407 $(div).css('left', left+'px');
408 $(div).css('width', width+'px');
409 $(div).css('height', height+'px');
410 //$(div).text('loading...');
412 $('#BRpageview').append(div);
414 var img = document.createElement("img");
415 img.src = this._getPageURI(index, this.reduce, 0);
416 $(img).css('width', width+'px');
417 $(img).css('height', height+'px');
421 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
424 leafTop += height +10;
428 for (i=0; i<this.displayedIndices.length; i++) {
429 if (BookReader.util.notInArray(this.displayedIndices[i], indicesToDisplay)) {
430 var index = this.displayedIndices[i];
431 //console.log('Removing leaf ' + index);
432 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
433 $('#pagediv'+index).remove();
435 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
439 this.displayedIndices = indicesToDisplay.slice();
440 this.updateSearchHilites();
442 if (null != this.getPageNum(firstIndexToDraw)) {
443 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
445 $("#BRpagenum").val('');
448 this.updateToolbarZoom(this.reduce);
452 // drawLeafsThumbnail()
453 //______________________________________________________________________________
454 // If seekIndex is defined, the view will be drawn with that page visible (without any
455 // animated scrolling)
456 BookReader.prototype.drawLeafsThumbnail = function( seekIndex ) {
457 //alert('drawing leafs!');
460 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
462 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
476 // Will be set to top of requested seek index, if set
479 // Calculate the position of every thumbnail. $$$ cache instead of calculating on every draw
480 for (i=0; i<this.numLeafs; i++) {
481 leafWidth = this.thumbWidth;
482 if (rightPos + (leafWidth + this.padding) > viewWidth){
488 if (leafMap[currentRow]===undefined) { leafMap[currentRow] = {}; }
489 if (leafMap[currentRow].leafs===undefined) {
490 leafMap[currentRow].leafs = [];
491 leafMap[currentRow].height = 0;
492 leafMap[currentRow].top = 0;
494 leafMap[currentRow].leafs[leafIndex] = {};
495 leafMap[currentRow].leafs[leafIndex].num = i;
496 leafMap[currentRow].leafs[leafIndex].left = rightPos;
498 leafHeight = parseInt((this.getPageHeight(leafMap[currentRow].leafs[leafIndex].num)*this.thumbWidth)/this.getPageWidth(leafMap[currentRow].leafs[leafIndex].num), 10);
499 if (leafHeight > leafMap[currentRow].height) {
500 leafMap[currentRow].height = leafHeight;
502 if (leafIndex===0) { bottomPos += this.padding + leafMap[currentRow].height; }
503 rightPos += leafWidth + this.padding;
504 if (rightPos > maxRight) { maxRight = rightPos; }
507 if (i == seekIndex) {
508 seekTop = bottomPos - this.padding - leafMap[currentRow].height;
512 // reset the bottom position based on thumbnails
513 $('#BRpageview').height(bottomPos);
515 var pageViewBuffer = Math.floor(($('#BRcontainer').attr('scrollWidth') - maxRight) / 2) - 14;
517 // If seekTop is defined, seeking was requested and target found
518 if (typeof(seekTop) != 'undefined') {
519 $('#BRcontainer').scrollTop( seekTop );
522 var scrollTop = $('#BRcontainer').attr('scrollTop');
523 var scrollBottom = scrollTop + $('#BRcontainer').height();
527 var rowsToDisplay = [];
529 // Visible leafs with least/greatest index
530 var leastVisible = this.numLeafs - 1;
533 // Determine the thumbnails in view
534 for (i=0; i<leafMap.length; i++) {
535 leafBottom += this.padding + leafMap[i].height;
536 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
537 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
538 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
539 if (topInView | bottomInView | middleInView) {
540 //console.log('row to display: ' + j);
541 rowsToDisplay.push(i);
542 if (leafMap[i].leafs[0].num < leastVisible) {
543 leastVisible = leafMap[i].leafs[0].num;
545 if (leafMap[i].leafs[leafMap[i].leafs.length - 1].num > mostVisible) {
546 mostVisible = leafMap[i].leafs[leafMap[i].leafs.length - 1].num;
549 if (leafTop > leafMap[i].top) { leafMap[i].top = leafTop; }
550 leafTop = leafBottom;
553 // create a buffer of preloaded rows before and after the visible rows
554 var firstRow = rowsToDisplay[0];
555 var lastRow = rowsToDisplay[rowsToDisplay.length-1];
556 for (i=1; i<this.thumbRowBuffer+1; i++) {
557 if (lastRow+i < leafMap.length) { rowsToDisplay.push(lastRow+i); }
559 for (i=1; i<this.thumbRowBuffer+1; i++) {
560 if (firstRow-i >= 0) { rowsToDisplay.push(firstRow-i); }
563 // Create the thumbnail divs and images (lazy loaded)
572 for (i=0; i<rowsToDisplay.length; i++) {
573 if (BookReader.util.notInArray(rowsToDisplay[i], this.displayedRows)) {
574 row = rowsToDisplay[i];
576 for (j=0; j<leafMap[row].leafs.length; j++) {
578 leaf = leafMap[row].leafs[j].num;
580 leafWidth = this.thumbWidth;
581 leafHeight = parseInt((this.getPageHeight(leaf)*this.thumbWidth)/this.getPageWidth(leaf), 10);
582 leafTop = leafMap[row].top;
583 left = leafMap[row].leafs[index].left + pageViewBuffer;
584 if ('rl' == this.pageProgression){
585 left = viewWidth - leafWidth - left;
588 div = document.createElement("div");
589 div.id = 'pagediv'+leaf;
590 div.style.position = "absolute";
591 div.className = "BRpagedivthumb";
593 left += this.padding;
594 $(div).css('top', leafTop + 'px');
595 $(div).css('left', left+'px');
596 $(div).css('width', leafWidth+'px');
597 $(div).css('height', leafHeight+'px');
598 //$(div).text('loading...');
600 // link to page in single page mode
601 link = document.createElement("a");
602 $(link).data('leaf', leaf);
603 $(link).bind('tap', function(event) {
604 self.firstIndex = $(this).data('leaf');
605 self.switchMode(self.constMode1up);
606 event.preventDefault();
609 // $$$ we don't actually go to this URL (click is handled in handler above)
610 link.href = '#page/' + (this.getPageNum(leaf)) +'/mode/1up' ;
613 $('#BRpageview').append(div);
615 img = document.createElement("img");
616 var thumbReduce = Math.floor(this.getPageWidth(leaf) / this.thumbWidth);
618 $(img).attr('src', this.imagesBaseURL + 'transparent.png')
619 .css({'width': leafWidth+'px', 'height': leafHeight+'px' })
620 .addClass('BRlazyload')
621 // Store the URL of the image that will replace this one
622 .data('srcURL', this._getPageURI(leaf, thumbReduce));
624 //console.log('displaying thumbnail: ' + leaf);
629 // Remove thumbnails that are not to be displayed
631 for (i=0; i<this.displayedRows.length; i++) {
632 if (BookReader.util.notInArray(this.displayedRows[i], rowsToDisplay)) {
633 row = this.displayedRows[i];
635 // $$$ Safari doesn't like the comprehension
636 //var rowLeafs = [leaf.num for each (leaf in leafMap[row].leafs)];
637 //console.log('Removing row ' + row + ' ' + rowLeafs);
639 for (k=0; k<leafMap[row].leafs.length; k++) {
640 index = leafMap[row].leafs[k].num;
641 //console.log('Removing leaf ' + index);
642 $('#pagediv'+index).remove();
646 var mRow = this.displayedRows[i];
647 var mLeafs = '[' + [leaf.num for each (leaf in leafMap[mRow].leafs)] + ']';
648 console.log('NOT Removing row ' + mRow + ' ' + mLeafs);
653 // Update which page is considered current to make sure a visible page is the current one
654 var currentIndex = this.currentIndex();
655 // console.log('current ' + currentIndex);
656 // console.log('least visible ' + leastVisible + ' most visible ' + mostVisible);
657 if (currentIndex < leastVisible) {
658 this.setCurrentIndex(leastVisible);
659 } else if (currentIndex > mostVisible) {
660 this.setCurrentIndex(mostVisible);
663 this.displayedRows = rowsToDisplay.slice();
665 // Update hash, but only if we're currently displaying a leaf
666 // Hack that fixes #365790
667 if (this.displayedRows.length > 0) {
668 this.updateLocationHash();
671 // remove previous highlights
672 $('.BRpagedivthumb_highlight').removeClass('BRpagedivthumb_highlight');
674 // highlight current page
675 $('#pagediv'+this.currentIndex()).addClass('BRpagedivthumb_highlight');
677 this.lazyLoadThumbnails();
679 // Update page number box. $$$ refactor to function
680 if (null !== this.getPageNum(this.currentIndex())) {
681 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
683 $("#BRpagenum").val('');
686 this.updateToolbarZoom(this.reduce);
689 BookReader.prototype.lazyLoadThumbnails = function() {
691 // console.log('lazy load');
693 // We check the complete property since load may not be fired if loading from the cache
694 $('.BRlazyloading').filter('[complete=true]').removeClass('BRlazyloading');
696 var loading = $('.BRlazyloading').length;
697 var toLoad = this.thumbMaxLoading - loading;
699 // console.log(' ' + loading + ' thumbnails loading');
700 // console.log(' this.thumbMaxLoading ' + this.thumbMaxLoading);
705 // $$$ TODO load those near top (but not beyond) page view first
706 $('#BRpageview img.BRlazyload').filter(':lt(' + toLoad + ')').each( function() {
707 self.lazyLoadImage(this);
712 BookReader.prototype.lazyLoadImage = function (dummyImage) {
713 //console.log(' lazy load started for ' + $(dummyImage).data('srcURL').match('([0-9]{4}).jp2')[1] );
715 var img = new Image();
719 .addClass('BRlazyloading')
720 .one('load', function() {
721 //if (console) { console.log(' onload ' + $(this).attr('src').match('([0-9]{4}).jp2')[1]); };
723 $(this).removeClass('BRlazyloading');
725 // $$$ Calling lazyLoadThumbnails here was causing stack overflow on IE so
726 // we call the function after a slight delay. Also the img.complete property
727 // is not yet set in IE8 inside this onload handler
728 setTimeout(function() { self.lazyLoadThumbnails(); }, 100);
730 .one('error', function() {
731 // Remove class so we no longer count as loading
732 $(this).removeClass('BRlazyloading');
734 .attr( { width: $(dummyImage).width(),
735 height: $(dummyImage).height(),
736 src: $(dummyImage).data('srcURL')
739 // replace with the new img
740 $(dummyImage).before(img).remove();
742 img = null; // tidy up closure
746 // drawLeafsTwoPage()
747 //______________________________________________________________________________
748 BookReader.prototype.drawLeafsTwoPage = function() {
749 var scrollTop = $('#BRtwopageview').attr('scrollTop');
750 var scrollBottom = scrollTop + $('#BRtwopageview').height();
752 // $$$ we should use calculated values in this.twoPage (recalc if necessary)
754 var indexL = this.twoPage.currentIndexL;
756 var heightL = this._getPageHeight(indexL);
757 var widthL = this._getPageWidth(indexL);
759 var leafEdgeWidthL = this.leafEdgeWidth(indexL);
760 var leafEdgeWidthR = this.twoPage.edgeWidth - leafEdgeWidthL;
761 //var bookCoverDivWidth = this.twoPage.width*2 + 20 + this.twoPage.edgeWidth; // $$$ hardcoded cover width
762 var bookCoverDivWidth = this.twoPage.bookCoverDivWidth;
763 //console.log(leafEdgeWidthL);
765 var middle = this.twoPage.middle; // $$$ getter instead?
766 var top = this.twoPageTop();
767 var bookCoverDivLeft = this.twoPage.bookCoverDivLeft;
769 this.twoPage.scaledWL = this.getPageWidth2UP(indexL);
770 this.twoPage.gutter = this.twoPageGutter();
772 this.prefetchImg(indexL);
773 $(this.prefetchedImgs[indexL]).css({
774 position: 'absolute',
775 left: this.twoPage.gutter-this.twoPage.scaledWL+'px',
778 height: this.twoPage.height +'px', // $$$ height forced the same for both pages
779 width: this.twoPage.scaledWL + 'px',
780 borderRight: '1px solid black',
782 }).appendTo('#BRtwopageview');
784 var indexR = this.twoPage.currentIndexR;
785 var heightR = this._getPageHeight(indexR);
786 var widthR = this._getPageWidth(indexR);
788 // $$$ should use getwidth2up?
789 //var scaledWR = this.twoPage.height*widthR/heightR;
790 this.twoPage.scaledWR = this.getPageWidth2UP(indexR);
791 this.prefetchImg(indexR);
792 $(this.prefetchedImgs[indexR]).css({
793 position: 'absolute',
794 left: this.twoPage.gutter+'px',
797 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
798 width: this.twoPage.scaledWR + 'px',
799 borderLeft: '1px solid black',
801 }).appendTo('#BRtwopageview');
804 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
805 this.setMouseHandlers2UP();
806 this.twoPageSetCursor();
808 this.updatePageNumBox2UP();
809 this.updateToolbarZoom(this.reduce);
811 // this.twoPagePlaceFlipAreas(); // No longer used
815 // updatePageNumBox2UP
816 //______________________________________________________________________________
817 BookReader.prototype.updatePageNumBox2UP = function() {
818 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
819 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
821 $("#BRpagenum").val('');
823 this.updateLocationHash();
827 //______________________________________________________________________________
828 BookReader.prototype.loadLeafs = function() {
832 if (null == this.timer) {
833 this.timer=setTimeout(function(){self.drawLeafs()},250);
835 clearTimeout(this.timer);
836 this.timer=setTimeout(function(){self.drawLeafs()},250);
842 // Pass 1 to zoom in, anything else to zoom out
843 //______________________________________________________________________________
844 BookReader.prototype.zoom = function(direction) {
846 case this.constMode1up:
847 if (direction == 1) {
849 return this.zoom1up('in');
851 return this.zoom1up('out');
854 case this.constMode2up:
855 if (direction == 1) {
857 return this.zoom2up('in');
859 return this.zoom2up('out');
862 case this.constModeThumb:
863 // XXX update zoomThumb for named directions
864 return this.zoomThumb(direction);
870 //______________________________________________________________________________
871 BookReader.prototype.zoom1up = function(direction) {
873 if (2 == this.mode) { //can only zoom in 1-page mode
878 var reduceFactor = this.nextReduce(this.reduce, direction, this.onePage.reductionFactors);
880 if (this.reduce == reduceFactor.reduce) {
881 // Already at this level
885 this.reduce = reduceFactor.reduce; // $$$ incorporate into function
886 this.onePage.autofit = reduceFactor.autofit;
888 this.pageScale = this.reduce; // preserve current reduce
889 this.resizePageView();
891 $('#BRpageview').empty()
892 this.displayedIndices = [];
895 this.updateToolbarZoom(this.reduce);
897 // Recalculate search hilites
898 this.removeSearchHilites();
899 this.updateSearchHilites();
904 //______________________________________________________________________________
905 BookReader.prototype.resizePageView = function() {
907 // $$$ This code assumes 1up mode
908 // e.g. does not preserve position in thumbnail mode
909 // See http://bugs.launchpad.net/bookreader/+bug/552972
912 case this.constMode1up:
913 case this.constMode2up:
914 this.resizePageView1up();
916 case this.constModeThumb:
917 this.prepareThumbnailView( this.currentIndex() );
920 alert('Resize not implemented for this mode');
924 BookReader.prototype.resizePageView1up = function() {
927 //var viewWidth = $('#BRcontainer').width(); //includes scrollBar
928 var viewWidth = $('#BRcontainer').attr('clientWidth');
930 var oldScrollTop = $('#BRcontainer').attr('scrollTop');
931 var oldScrollLeft = $('#BRcontainer').attr('scrollLeft');
932 var oldPageViewHeight = $('#BRpageview').height();
933 var oldPageViewWidth = $('#BRpageview').width();
935 var oldCenterY = this.centerY1up();
936 var oldCenterX = this.centerX1up();
938 if (0 != oldPageViewHeight) {
939 var scrollRatio = oldCenterY / oldPageViewHeight;
944 // Recalculate 1up reduction factors
945 this.onePageCalculateReductionFactors( $('#BRcontainer').attr('clientWidth'),
946 $('#BRcontainer').attr('clientHeight') );
947 // Update current reduce (if in autofit)
948 if (this.onePage.autofit) {
949 var reductionFactor = this.nextReduce(this.reduce, this.onePage.autofit, this.onePage.reductionFactors);
950 this.reduce = reductionFactor.reduce;
953 for (i=0; i<this.numLeafs; i++) {
954 viewHeight += parseInt(this._getPageHeight(i)/this.reduce) + this.padding;
955 var width = parseInt(this._getPageWidth(i)/this.reduce);
956 if (width>viewWidth) viewWidth=width;
958 $('#BRpageview').height(viewHeight);
959 $('#BRpageview').width(viewWidth);
961 var newCenterY = scrollRatio*viewHeight;
962 var newTop = Math.max(0, Math.floor( newCenterY - $('#BRcontainer').height()/2 ));
963 $('#BRcontainer').attr('scrollTop', newTop);
965 // We use clientWidth here to avoid miscalculating due to scroll bar
966 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
967 var newLeft = newCenterX - $('#BRcontainer').attr('clientWidth') / 2;
968 newLeft = Math.max(newLeft, 0);
969 $('#BRcontainer').attr('scrollLeft', newLeft);
970 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
972 //this.centerPageView();
975 this.removeSearchHilites();
976 this.updateSearchHilites();
981 //______________________________________________________________________________
982 // Returns the current offset of the viewport center in scaled document coordinates.
983 BookReader.prototype.centerX1up = function() {
985 if ($('#BRpageview').width() < $('#BRcontainer').attr('clientWidth')) { // fully shown
986 centerX = $('#BRpageview').width();
988 centerX = $('#BRcontainer').attr('scrollLeft') + $('#BRcontainer').attr('clientWidth') / 2;
990 centerX = Math.floor(centerX);
995 //______________________________________________________________________________
996 // Returns the current offset of the viewport center in scaled document coordinates.
997 BookReader.prototype.centerY1up = function() {
998 var centerY = $('#BRcontainer').attr('scrollTop') + $('#BRcontainer').height() / 2;
999 return Math.floor(centerY);
1003 //______________________________________________________________________________
1004 BookReader.prototype.centerPageView = function() {
1006 var scrollWidth = $('#BRcontainer').attr('scrollWidth');
1007 var clientWidth = $('#BRcontainer').attr('clientWidth');
1008 //console.log('sW='+scrollWidth+' cW='+clientWidth);
1009 if (scrollWidth > clientWidth) {
1010 $('#BRcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
1015 // zoom2up(direction)
1016 //______________________________________________________________________________
1017 BookReader.prototype.zoom2up = function(direction) {
1019 // Hard stop autoplay
1020 this.stopFlipAnimations();
1022 // Recalculate autofit factors
1023 this.twoPageCalculateReductionFactors();
1025 // Get new zoom state
1026 var reductionFactor = this.nextReduce(this.reduce, direction, this.twoPage.reductionFactors);
1027 if ((this.reduce == reductionFactor.reduce) && (this.twoPage.autofit == reductionFactor.autofit)) {
1031 this.twoPage.autofit = reductionFactor.autofit;
1032 this.reduce = reductionFactor.reduce;
1033 this.pageScale = this.reduce; // preserve current reduce
1035 // Preserve view center position
1036 var oldCenter = this.twoPageGetViewCenter();
1038 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
1039 // $$$ An improvement would be to use the low res image until the larger one is loaded.
1040 if (1 == direction) {
1041 for (var img in this.prefetchedImgs) {
1042 delete this.prefetchedImgs[img];
1046 // Prepare view with new center to minimize visual glitches
1047 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
1050 BookReader.prototype.zoomThumb = function(direction) {
1051 var oldColumns = this.thumbColumns;
1052 switch (direction) {
1054 this.thumbColumns += 1;
1057 this.thumbColumns -= 1;
1062 if (this.thumbColumns < 2) {
1063 this.thumbColumns = 2;
1064 } else if (this.thumbColumns > 8) {
1065 this.thumbColumns = 8;
1068 if (this.thumbColumns != oldColumns) {
1069 this.prepareThumbnailView();
1073 // Returns the width per thumbnail to display the requested number of columns
1074 // Note: #BRpageview must already exist since its width is used to calculate the
1076 BookReader.prototype.getThumbnailWidth = function(thumbnailColumns) {
1077 var padding = (thumbnailColumns + 1) * this.padding;
1078 var width = ($('#BRpageview').width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides
1079 return parseInt(width);
1082 // quantizeReduce(reduce)
1083 //______________________________________________________________________________
1084 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
1085 BookReader.prototype.quantizeReduce = function(reduce, reductionFactors) {
1086 var quantized = reductionFactors[0].reduce;
1087 var distance = Math.abs(reduce - quantized);
1088 for (var i = 1; i < reductionFactors.length; i++) {
1089 newDistance = Math.abs(reduce - reductionFactors[i].reduce);
1090 if (newDistance < distance) {
1091 distance = newDistance;
1092 quantized = reductionFactors[i].reduce;
1099 // reductionFactors should be array of sorted reduction factors
1100 // e.g. [ {reduce: 0.25, autofit: null}, {reduce: 0.3, autofit: 'width'}, {reduce: 1, autofit: null} ]
1101 BookReader.prototype.nextReduce = function( currentReduce, direction, reductionFactors ) {
1103 // XXX add 'closest', to replace quantize function
1105 if (direction == 'in') {
1106 var newReduceIndex = 0;
1108 for (var i = 1; i < reductionFactors.length; i++) {
1109 if (reductionFactors[i].reduce < currentReduce) {
1113 return reductionFactors[newReduceIndex];
1115 } else if (direction == 'out') { // zoom out
1116 var lastIndex = reductionFactors.length - 1;
1117 var newReduceIndex = lastIndex;
1119 for (var i = lastIndex; i >= 0; i--) {
1120 if (reductionFactors[i].reduce > currentReduce) {
1124 return reductionFactors[newReduceIndex];
1127 // Asked for specific autofit mode
1128 for (var i = 0; i < reductionFactors.length; i++) {
1129 if (reductionFactors[i].autofit == direction) {
1130 return reductionFactors[i];
1134 alert('Could not find reduction factor for direction ' + direction);
1135 return reductionFactors[0];
1139 BookReader.prototype._reduceSort = function(a, b) {
1140 return a.reduce - b.reduce;
1144 //______________________________________________________________________________
1145 // Attempts to jump to page. Returns true if page could be found, false otherwise.
1146 BookReader.prototype.jumpToPage = function(pageNum) {
1148 var pageIndex = this.getPageIndex(pageNum);
1150 if ('undefined' != typeof(pageIndex)) {
1153 this.jumpToIndex(pageIndex);
1154 $('#BRcontainer').attr('scrollTop', leafTop);
1163 //______________________________________________________________________________
1164 BookReader.prototype.jumpToIndex = function(index, pageX, pageY) {
1166 if (this.constMode2up == this.mode) {
1169 // By checking against min/max we do nothing if requested index
1171 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1172 this.flipBackToIndex(index);
1173 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1174 this.flipFwdToIndex(index);
1177 } else if (this.constModeThumb == this.mode) {
1178 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
1188 for (i=0; i<(index+1); i++) {
1189 leafWidth = this.thumbWidth;
1190 if (rightPos + (leafWidth + this.padding) > viewWidth){
1196 leafHeight = parseInt((this.getPageHeight(leafIndex)*this.thumbWidth)/this.getPageWidth(leafIndex), 10);
1197 if (leafHeight > rowHeight) { rowHeight = leafHeight; }
1198 if (leafIndex==0) { leafTop = bottomPos; }
1199 if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
1200 rightPos += leafWidth + this.padding;
1203 this.firstIndex=index;
1204 if ($('#BRcontainer').attr('scrollTop') == leafTop) {
1207 $('#BRcontainer').animate({scrollTop: leafTop },'fast');
1215 for (i=0; i<index; i++) {
1216 h = parseInt(this._getPageHeight(i)/this.reduce);
1217 leafTop += h + this.padding;
1221 //console.log('pageY ' + pageY);
1222 var offset = parseInt( (pageY) / this.reduce);
1223 offset -= $('#BRcontainer').attr('clientHeight') >> 1;
1224 //console.log( 'jumping to ' + leafTop + ' ' + offset);
1227 // Show page just a little below the top
1228 leafTop -= this.padding / 2;
1232 var offset = parseInt( (pageX) / this.reduce);
1233 offset -= $('#BRcontainer').attr('clientWidth') >> 1;
1236 // Preserve left position
1237 leafLeft = $('#BRcontainer').scrollLeft();
1240 //$('#BRcontainer').attr('scrollTop', leafTop);
1241 $('#BRcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
1247 //______________________________________________________________________________
1248 BookReader.prototype.switchMode = function(mode) {
1250 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
1252 if (mode == this.mode) {
1256 if (!this.canSwitchToMode(mode)) {
1261 this.removeSearchHilites();
1264 this.switchToolbarMode(mode);
1266 // reinstate scale if moving from thumbnail view
1267 if (this.pageScale != this.reduce) {
1268 this.reduce = this.pageScale;
1271 // $$$ TODO preserve center of view when switching between mode
1272 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
1274 // XXX maybe better to preserve zoom in each mode
1276 this.onePageCalculateReductionFactors( $('#BRcontainer').attr('clientWidth'), $('#BRcontainer').attr('clientHeight'));
1277 this.reduce = this.quantizeReduce(this.reduce, this.onePage.reductionFactors);
1278 this.prepareOnePageView();
1279 } else if (3 == mode) {
1280 this.reduce = this.quantizeReduce(this.reduce, this.reductionFactors);
1281 this.prepareThumbnailView();
1283 // $$$ why don't we save autofit?
1284 this.twoPage.autofit = null; // Take zoom level from other mode
1285 this.twoPageCalculateReductionFactors();
1286 this.reduce = this.quantizeReduce(this.reduce, this.twoPage.reductionFactors);
1287 this.prepareTwoPageView();
1288 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
1293 //prepareOnePageView()
1294 //______________________________________________________________________________
1295 BookReader.prototype.prepareOnePageView = function() {
1297 // var startLeaf = this.displayedIndices[0];
1298 var startLeaf = this.currentIndex();
1300 $('#BRcontainer').empty();
1301 $('#BRcontainer').css({
1302 overflowY: 'scroll',
1306 $("#BRcontainer").append("<div id='BRpageview'></div>");
1308 // Attaches to first child - child must be present
1309 $('#BRcontainer').dragscrollable();
1310 this.bindGestures($('#BRcontainer'));
1312 // $$$ keep select enabled for now since disabling it breaks keyboard
1313 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1314 // BookReader.util.disableSelect($('#BRpageview'));
1316 this.resizePageView();
1318 this.jumpToIndex(startLeaf);
1319 this.displayedIndices = [];
1321 this.drawLeafsOnePage();
1324 //prepareThumbnailView()
1325 //______________________________________________________________________________
1326 BookReader.prototype.prepareThumbnailView = function() {
1328 $('#BRcontainer').empty();
1329 $('#BRcontainer').css({
1330 overflowY: 'scroll',
1334 $("#BRcontainer").append("<div id='BRpageview'></div>");
1336 $('#BRcontainer').dragscrollable();
1337 this.bindGestures($('#BRcontainer'));
1339 // $$$ keep select enabled for now since disabling it breaks keyboard
1340 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1341 // BookReader.util.disableSelect($('#BRpageview'));
1343 this.thumbWidth = this.getThumbnailWidth(this.thumbColumns);
1344 this.reduce = this.getPageWidth(0)/this.thumbWidth;
1346 this.displayedRows = [];
1348 // Draw leafs with current index directly in view (no animating to the index)
1349 this.drawLeafsThumbnail( this.currentIndex() );
1353 // prepareTwoPageView()
1354 //______________________________________________________________________________
1355 // Some decisions about two page view:
1357 // Both pages will be displayed at the same height, even if they were different physical/scanned
1358 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
1359 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
1360 // aspect ratio to determine the height.
1362 // The two page view div is resized to keep the middle of the book in the middle of the div
1363 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the BRcontent
1364 // div requires adjusting the offset of BRtwpageview and/or scrolling in BRcontent.
1365 BookReader.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
1366 $('#BRcontainer').empty();
1367 $('#BRcontainer').css('overflow', 'auto');
1369 // We want to display two facing pages. We may be missing
1370 // one side of the spread because it is the first/last leaf,
1371 // foldouts, missing pages, etc
1373 //var targetLeaf = this.displayedIndices[0];
1374 var targetLeaf = this.firstIndex;
1376 if (targetLeaf < this.firstDisplayableIndex()) {
1377 targetLeaf = this.firstDisplayableIndex();
1380 if (targetLeaf > this.lastDisplayableIndex()) {
1381 targetLeaf = this.lastDisplayableIndex();
1384 //this.twoPage.currentIndexL = null;
1385 //this.twoPage.currentIndexR = null;
1386 //this.pruneUnusedImgs();
1388 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1389 this.twoPage.currentIndexL = currentSpreadIndices[0];
1390 this.twoPage.currentIndexR = currentSpreadIndices[1];
1391 this.firstIndex = this.twoPage.currentIndexL;
1393 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1395 this.pruneUnusedImgs();
1396 this.prefetch(); // Preload images or reload if scaling has changed
1398 //console.dir(this.twoPage);
1400 // Add the two page view
1401 // $$$ Can we get everything set up and then append?
1402 $('#BRcontainer').append('<div id="BRtwopageview"></div>');
1404 // Attaches to first child, so must come after we add the page view
1405 $('#BRcontainer').dragscrollable();
1406 this.bindGestures($('#BRcontainer'));
1408 // $$$ calculate first then set
1409 $('#BRtwopageview').css( {
1410 height: this.twoPage.totalHeight + 'px',
1411 width: this.twoPage.totalWidth + 'px',
1412 position: 'absolute'
1415 // If there will not be scrollbars (e.g. when zooming out) we center the book
1416 // since otherwise the book will be stuck off-center
1417 if (this.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
1418 centerPercentageX = 0.5;
1420 if (this.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
1421 centerPercentageY = 0.5;
1424 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1426 this.twoPage.coverDiv = document.createElement('div');
1427 $(this.twoPage.coverDiv).attr('id', 'BRbookcover').css({
1428 width: this.twoPage.bookCoverDivWidth + 'px',
1429 height: this.twoPage.bookCoverDivHeight+'px',
1430 visibility: 'visible',
1431 position: 'absolute',
1432 left: this.twoPage.bookCoverDivLeft + 'px',
1433 top: this.twoPage.bookCoverDivTop+'px'
1434 }).appendTo('#BRtwopageview');
1436 this.leafEdgeR = document.createElement('div');
1437 this.leafEdgeR.className = 'BRleafEdgeR';
1438 $(this.leafEdgeR).css({
1439 width: this.twoPage.leafEdgeWidthR + 'px',
1440 height: this.twoPage.height-1 + 'px',
1441 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1442 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px'
1443 }).appendTo('#BRtwopageview');
1445 this.leafEdgeL = document.createElement('div');
1446 this.leafEdgeL.className = 'BRleafEdgeL';
1447 $(this.leafEdgeL).css({
1448 width: this.twoPage.leafEdgeWidthL + 'px',
1449 height: this.twoPage.height-1 + 'px',
1450 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1451 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px'
1452 }).appendTo('#BRtwopageview');
1454 div = document.createElement('div');
1455 $(div).attr('id', 'BRbookspine').css({
1456 width: this.twoPage.bookSpineDivWidth+'px',
1457 height: this.twoPage.bookSpineDivHeight+'px',
1458 left: this.twoPage.bookSpineDivLeft+'px',
1459 top: this.twoPage.bookSpineDivTop+'px'
1460 }).appendTo('#BRtwopageview');
1462 var self = this; // for closure
1464 /* Flip areas no longer used
1465 this.twoPage.leftFlipArea = document.createElement('div');
1466 this.twoPage.leftFlipArea.className = 'BRfliparea';
1467 $(this.twoPage.leftFlipArea).attr('id', 'BRleftflip').css({
1469 width: this.twoPageFlipAreaWidth() + 'px',
1470 height: this.twoPageFlipAreaHeight() + 'px',
1471 position: 'absolute',
1472 left: this.twoPageLeftFlipAreaLeft() + 'px',
1473 top: this.twoPageFlipAreaTop() + 'px',
1476 }).bind('click', function(e) {
1478 }).bind('mousedown', function(e) {
1480 }).appendTo('#BRtwopageview');
1482 this.twoPage.rightFlipArea = document.createElement('div');
1483 this.twoPage.rightFlipArea.className = 'BRfliparea';
1484 $(this.twoPage.rightFlipArea).attr('id', 'BRrightflip').css({
1486 width: this.twoPageFlipAreaWidth() + 'px',
1487 height: this.twoPageFlipAreaHeight() + 'px',
1488 position: 'absolute',
1489 left: this.twoPageRightFlipAreaLeft() + 'px',
1490 top: this.twoPageFlipAreaTop() + 'px',
1493 }).bind('click', function(e) {
1495 }).bind('mousedown', function(e) {
1497 }).appendTo('#BRtwopageview');
1500 this.prepareTwoPagePopUp();
1502 this.displayedIndices = [];
1504 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1505 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1507 this.drawLeafsTwoPage();
1508 this.updateToolbarZoom(this.reduce);
1512 this.removeSearchHilites();
1513 this.updateSearchHilites();
1517 // prepareTwoPagePopUp()
1519 // This function prepares the "View Page n" popup that shows while the mouse is
1520 // over the left/right "stack of sheets" edges. It also binds the mouse
1521 // events for these divs.
1522 //______________________________________________________________________________
1523 BookReader.prototype.prepareTwoPagePopUp = function() {
1525 this.twoPagePopUp = document.createElement('div');
1526 this.twoPagePopUp.className = 'BRtwoPagePopUp';
1527 $(this.twoPagePopUp).css({
1529 }).appendTo('#BRcontainer');
1530 $(this.twoPagePopUp).hide();
1532 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1533 $(e.data.twoPagePopUp).show();
1536 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1537 $(e.data.twoPagePopUp).hide();
1540 $(this.leafEdgeL).bind('click', this, function(e) {
1542 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1543 e.data.jumpToIndex(jumpIndex);
1546 $(this.leafEdgeR).bind('click', this, function(e) {
1548 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1549 e.data.jumpToIndex(jumpIndex);
1552 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1554 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1555 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1557 // $$$ TODO: Make sure popup is positioned so that it is in view
1558 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1559 $(e.data.twoPagePopUp).css({
1560 left: e.pageX- $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() + 20 + 'px',
1561 top: e.pageY - $('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1565 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1567 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1568 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1570 // $$$ TODO: Make sure popup is positioned so that it is in view
1571 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1572 $(e.data.twoPagePopUp).css({
1573 left: e.pageX - $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1574 top: e.pageY-$('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1579 // calculateSpreadSize()
1580 //______________________________________________________________________________
1581 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1582 // this.twoPage.currentIndexR
1583 // This function sets this.twoPage.height, twoPage.width
1585 BookReader.prototype.calculateSpreadSize = function() {
1587 var firstIndex = this.twoPage.currentIndexL;
1588 var secondIndex = this.twoPage.currentIndexR;
1589 //console.log('first page is ' + firstIndex);
1591 // Calculate page sizes and total leaf width
1593 if ( this.twoPage.autofit) {
1594 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1596 // set based on reduction factor
1597 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1600 // Both pages together
1601 this.twoPage.height = spreadSize.height;
1602 this.twoPage.width = spreadSize.width;
1605 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1606 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1609 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1610 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1611 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1615 // The width of the book cover div. The combined width of both pages, twice the width
1616 // of the book cover internal padding (2*10) and the page edges
1617 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1618 // The height of the book cover div
1619 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1622 // We calculate the total width and height for the div so that we can make the book
1624 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1625 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1626 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1627 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1628 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1629 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1631 // We want to minimize the unused space in two-up mode (maximize the amount of page
1632 // shown). We give width to the leaf edges and these widths change (though the sum
1633 // of the two remains constant) as we flip through the book. With the book
1634 // cover centered and fixed in the BRcontainer div the page images will meet
1635 // at the "gutter" which is generally offset from the center.
1636 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1637 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1639 // The left edge of the book cover moves depending on the width of the pages
1640 // $$$ change to getter
1641 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1642 // The top edge of the book cover stays a fixed distance from the top
1643 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1646 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1647 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1648 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1651 this.reduce = spreadSize.reduce; // $$$ really set this here?
1654 BookReader.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1657 // We check which page is closest to a "normal" page and use that to set the height
1658 // for both pages. This means that foldouts and other odd size pages will be displayed
1659 // smaller than the nominal zoom amount.
1660 var canon5Dratio = 1.5;
1663 height: this._getPageHeight(firstIndex),
1664 width: this._getPageWidth(firstIndex)
1668 height: this._getPageHeight(secondIndex),
1669 width: this._getPageWidth(secondIndex)
1672 var firstIndexRatio = first.height / first.width;
1673 var secondIndexRatio = second.height / second.width;
1674 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1677 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1678 ratio = firstIndexRatio;
1679 //console.log('using firstIndexRatio ' + ratio);
1681 ratio = secondIndexRatio;
1682 //console.log('using secondIndexRatio ' + ratio);
1685 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1686 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1);
1687 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1689 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1690 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1692 ideal.width = ($('#BRcontainer').width() - widthOutsidePages) >> 1;
1693 ideal.width -= 10; // $$$ fudge factor
1694 ideal.height = $('#BRcontainer').height() - heightOutsidePages;
1695 ideal.height -= 20; // fudge factor
1696 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1698 if (ideal.height/ratio <= ideal.width) {
1700 ideal.width = parseInt(ideal.height/ratio);
1703 ideal.height = parseInt(ideal.width*ratio);
1706 // $$$ check this logic with large spreads
1707 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1712 // getSpreadSizeFromReduce()
1713 //______________________________________________________________________________
1714 // Returns the spread size calculated from the reduction factor for the given pages
1715 BookReader.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1716 var spreadSize = {};
1717 // $$$ Scale this based on reduce?
1718 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1719 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1720 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1722 // $$$ Possibly incorrect -- we should make height "dominant"
1723 var nativeWidth = this._getPageWidth(firstIndex) + this._getPageWidth(secondIndex);
1724 var nativeHeight = this._getPageHeight(firstIndex) + this._getPageHeight(secondIndex);
1725 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1726 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1727 spreadSize.reduce = reduce;
1732 // twoPageGetAutofitReduce()
1733 //______________________________________________________________________________
1734 // Returns the current ideal reduction factor
1735 BookReader.prototype.twoPageGetAutofitReduce = function() {
1736 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1737 return spreadSize.reduce;
1740 BookReader.prototype.onePageGetAutofitWidth = function() {
1741 var widthPadding = 20;
1742 return (this.getMedianPageSize().width + 0.0) / ($('#BRcontainer').attr('clientWidth') - widthPadding * 2);
1745 BookReader.prototype.onePageGetAutofitHeight = function() {
1746 return (this.getMedianPageSize().height + 0.0) / ($('#BRcontainer').attr('clientHeight') - this.padding * 2); // make sure a little of adjacent pages show
1749 BookReader.prototype.getMedianPageSize = function() {
1750 if (this._medianPageSize) {
1751 return this._medianPageSize;
1754 // A little expensive but we just do it once
1757 for (var i = 0; i < this.numLeafs; i++) {
1758 widths.push(this.getPageWidth(i));
1759 heights.push(this.getPageHeight(i));
1765 this._medianPageSize = { width: widths[parseInt(widths.length / 2)], height: heights[parseInt(heights.length / 2)] };
1766 return this._medianPageSize;
1769 // Update the reduction factors for 1up mode given the available width and height. Recalculates
1770 // the autofit reduction factors.
1771 BookReader.prototype.onePageCalculateReductionFactors = function( width, height ) {
1772 this.onePage.reductionFactors = this.reductionFactors.concat(
1774 { reduce: this.onePageGetAutofitWidth(), autofit: 'width' },
1775 { reduce: this.onePageGetAutofitHeight(), autofit: 'height'}
1777 this.onePage.reductionFactors.sort(this._reduceSort);
1780 BookReader.prototype.twoPageCalculateReductionFactors = function() {
1781 this.twoPage.reductionFactors = this.reductionFactors.concat(
1783 { reduce: this.getIdealSpreadSize( this.twoPage.currentIndexL, this.twoPage.currentIndexR ).reduce,
1786 this.twoPage.reductionFactors.sort(this._reduceSort);
1789 // twoPageSetCursor()
1790 //______________________________________________________________________________
1791 // Set the cursor for two page view
1792 BookReader.prototype.twoPageSetCursor = function() {
1793 // console.log('setting cursor');
1794 if ( ($('#BRtwopageview').width() > $('#BRcontainer').attr('clientWidth')) ||
1795 ($('#BRtwopageview').height() > $('#BRcontainer').attr('clientHeight')) ) {
1796 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1797 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1799 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1800 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1805 //______________________________________________________________________________
1806 // Returns the currently active index.
1807 BookReader.prototype.currentIndex = function() {
1808 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1809 if (this.mode == this.constMode1up || this.mode == this.constModeThumb) {
1810 return this.firstIndex; // $$$ TODO page in center of view would be better
1811 } else if (this.mode == this.constMode2up) {
1812 // Only allow indices that are actually present in book
1813 return BookReader.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
1815 throw 'currentIndex called for unimplemented mode ' + this.mode;
1819 // setCurrentIndex(index)
1820 //______________________________________________________________________________
1821 // Sets the idea of current index without triggering other actions such as animation.
1822 // Compare to jumpToIndex which animates to that index
1823 BookReader.prototype.setCurrentIndex = function(index) {
1824 this.firstIndex = index;
1829 //______________________________________________________________________________
1830 // Flip the right page over onto the left
1831 BookReader.prototype.right = function() {
1832 if ('rl' != this.pageProgression) {
1842 //______________________________________________________________________________
1843 // Flip to the rightmost page
1844 BookReader.prototype.rightmost = function() {
1845 if ('rl' != this.pageProgression) {
1853 //______________________________________________________________________________
1854 // Flip the left page over onto the right.
1855 BookReader.prototype.left = function() {
1856 if ('rl' != this.pageProgression) {
1866 //______________________________________________________________________________
1867 // Flip to the leftmost page
1868 BookReader.prototype.leftmost = function() {
1869 if ('rl' != this.pageProgression) {
1877 //______________________________________________________________________________
1878 BookReader.prototype.next = function() {
1879 if (2 == this.mode) {
1881 this.flipFwdToIndex(null);
1883 if (this.firstIndex < this.lastDisplayableIndex()) {
1884 this.jumpToIndex(this.firstIndex+1);
1890 //______________________________________________________________________________
1891 BookReader.prototype.prev = function() {
1892 if (2 == this.mode) {
1894 this.flipBackToIndex(null);
1896 if (this.firstIndex >= 1) {
1897 this.jumpToIndex(this.firstIndex-1);
1902 BookReader.prototype.first = function() {
1903 this.jumpToIndex(this.firstDisplayableIndex());
1906 BookReader.prototype.last = function() {
1907 this.jumpToIndex(this.lastDisplayableIndex());
1911 //______________________________________________________________________________
1912 // Scrolls down one screen view
1913 BookReader.prototype.scrollDown = function() {
1914 if ($.inArray(this.mode, [this.constMode1up, this.constModeThumb]) >= 0) {
1915 if ( this.mode == this.constMode1up && (this.reduce >= this.onePageGetAutofitHeight()) ) {
1916 // Whole pages are visible, scroll whole page only
1920 $('#BRcontainer').animate(
1921 { scrollTop: '+=' + this._scrollAmount() + 'px'},
1922 400, 'easeInOutExpo'
1931 //______________________________________________________________________________
1932 // Scrolls up one screen view
1933 BookReader.prototype.scrollUp = function() {
1934 if ($.inArray(this.mode, [this.constMode1up, this.constModeThumb]) >= 0) {
1935 if ( this.mode == this.constMode1up && (this.reduce >= this.onePageGetAutofitHeight()) ) {
1936 // Whole pages are visible, scroll whole page only
1940 $('#BRcontainer').animate(
1941 { scrollTop: '-=' + this._scrollAmount() + 'px'},
1942 400, 'easeInOutExpo'
1951 //______________________________________________________________________________
1952 // The amount to scroll vertically in integer pixels
1953 BookReader.prototype._scrollAmount = function() {
1954 if (this.constMode1up == this.mode) {
1955 // Overlap by % of page size
1956 return parseInt($('#BRcontainer').attr('clientHeight') - this.getPageHeight(this.currentIndex()) / this.reduce * 0.03);
1959 return parseInt(0.9 * $('#BRcontainer').attr('clientHeight'));
1963 // flipBackToIndex()
1964 //______________________________________________________________________________
1965 // to flip back one spread, pass index=null
1966 BookReader.prototype.flipBackToIndex = function(index) {
1968 if (1 == this.mode) return;
1970 var leftIndex = this.twoPage.currentIndexL;
1972 if (this.animating) return;
1974 if (null != this.leafEdgeTmp) {
1975 alert('error: leafEdgeTmp should be null!');
1979 if (null == index) {
1980 index = leftIndex-2;
1982 //if (index<0) return;
1984 var previousIndices = this.getSpreadIndices(index);
1986 if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
1990 this.animating = true;
1992 if ('rl' != this.pageProgression) {
1993 // Assume LTR and we are going backward
1994 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1995 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
1997 // RTL and going backward
1998 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1999 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
2003 // flipLeftToRight()
2004 //______________________________________________________________________________
2005 // Flips the page on the left towards the page on the right
2006 BookReader.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
2008 var leftLeaf = this.twoPage.currentIndexL;
2010 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2011 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2012 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
2014 var currWidthL = this.getPageWidth2UP(leftLeaf);
2015 var newWidthL = this.getPageWidth2UP(newIndexL);
2016 var newWidthR = this.getPageWidth2UP(newIndexR);
2018 var top = this.twoPageTop();
2019 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
2021 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
2022 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
2024 //animation strategy:
2025 // 0. remove search highlight, if any.
2026 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
2027 // of the left leaf and where the user clicked in the leaf edge.
2028 // Note that if this function was triggered by left() and not a
2029 // mouse click, the width of leafEdgeTmp is very small (zero px).
2030 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
2031 // leftLeaf to width=0.
2032 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
2033 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
2034 // its new full width.
2035 // 4. After step 3 is finished, do the following:
2036 // - remove leafEdgeTmp from the dom.
2037 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
2038 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
2039 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
2040 // and width=newLeafEdgeWidthL.
2041 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
2042 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
2043 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
2044 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
2045 // - prefetch new adjacent leafs.
2046 // - set up click handlers for both new left and right leafs.
2047 // - redraw the search highlight.
2048 // - update the pagenum box and the url.
2051 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
2053 this.leafEdgeTmp = document.createElement('div');
2054 this.leafEdgeTmp.className = 'BRleafEdgeTmp';
2055 $(this.leafEdgeTmp).css({
2056 width: leafEdgeTmpW + 'px',
2057 height: this.twoPage.height-1 + 'px',
2058 left: leftEdgeTmpLeft + 'px',
2061 }).appendTo('#BRtwopageview');
2063 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
2064 $(this.leafEdgeL).css({
2065 width: newLeafEdgeWidthL+'px',
2066 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
2069 // Left gets the offset of the current left leaf from the document
2070 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
2071 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
2072 var right = $('#BRtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#BRtwopageview').offset().left-2+'px';
2074 // We change the left leaf to right positioning
2075 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
2076 $(this.prefetchedImgs[leftLeaf]).css({
2081 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
2082 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
2086 this.removeSearchHilites();
2088 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
2089 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
2091 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
2092 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
2094 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
2095 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
2096 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
2098 $(self.leafEdgeR).css({
2099 // Moves the right leaf edge
2100 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
2101 left: gutter+newWidthR+'px'
2104 $(self.leafEdgeL).css({
2105 // Moves and resizes the left leaf edge
2106 width: newLeafEdgeWidthL+'px',
2107 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2110 // Resizes the brown border div
2111 $(self.twoPage.coverDiv).css({
2112 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2113 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
2116 $(self.leafEdgeTmp).remove();
2117 self.leafEdgeTmp = null;
2119 // $$$ TODO refactor with opposite direction flip
2121 self.twoPage.currentIndexL = newIndexL;
2122 self.twoPage.currentIndexR = newIndexR;
2123 self.twoPage.scaledWL = newWidthL;
2124 self.twoPage.scaledWR = newWidthR;
2125 self.twoPage.gutter = gutter;
2127 self.firstIndex = self.twoPage.currentIndexL;
2128 self.displayedIndices = [newIndexL, newIndexR];
2129 self.pruneUnusedImgs();
2131 self.animating = false;
2133 self.updateSearchHilites2UP();
2134 self.updatePageNumBox2UP();
2136 // self.twoPagePlaceFlipAreas(); // No longer used
2137 self.setMouseHandlers2UP();
2138 self.twoPageSetCursor();
2140 if (self.animationFinishedCallback) {
2141 self.animationFinishedCallback();
2142 self.animationFinishedCallback = null;
2150 //______________________________________________________________________________
2151 // Whether we flip left or right is dependent on the page progression
2152 // to flip forward one spread, pass index=null
2153 BookReader.prototype.flipFwdToIndex = function(index) {
2155 if (this.animating) return;
2157 if (null != this.leafEdgeTmp) {
2158 alert('error: leafEdgeTmp should be null!');
2162 if (null == index) {
2163 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
2165 if (index > this.lastDisplayableIndex()) return;
2167 this.animating = true;
2169 var nextIndices = this.getSpreadIndices(index);
2171 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
2173 if ('rl' != this.pageProgression) {
2174 // We did not specify RTL
2175 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
2176 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
2179 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
2180 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
2184 // flipRightToLeft(nextL, nextR, gutter)
2185 // $$$ better not to have to pass gutter in
2186 //______________________________________________________________________________
2187 // Flip from left to right and show the nextL and nextR indices on those sides
2188 BookReader.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
2189 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2190 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
2191 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2192 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
2194 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
2196 var top = this.twoPageTop();
2197 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
2199 var middle = this.twoPage.middle;
2200 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
2202 this.leafEdgeTmp = document.createElement('div');
2203 this.leafEdgeTmp.className = 'BRleafEdgeTmp';
2204 $(this.leafEdgeTmp).css({
2205 width: leafEdgeTmpW + 'px',
2206 height: this.twoPage.height-1 + 'px',
2207 left: gutter+scaledW+'px',
2210 }).appendTo('#BRtwopageview');
2212 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
2213 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
2215 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
2216 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
2217 var newWidthL = this.getPageWidth2UP(newIndexL);
2218 var newWidthR = this.getPageWidth2UP(newIndexR);
2220 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
2222 var self = this; // closure-tastic!
2224 var speed = this.flipSpeed;
2226 this.removeSearchHilites();
2228 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
2229 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
2230 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
2231 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
2232 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
2234 $(self.leafEdgeL).css({
2235 width: newLeafEdgeWidthL+'px',
2236 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2239 // Resizes the book cover
2240 $(self.twoPage.coverDiv).css({
2241 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2242 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
2245 $(self.leafEdgeTmp).remove();
2246 self.leafEdgeTmp = null;
2248 self.twoPage.currentIndexL = newIndexL;
2249 self.twoPage.currentIndexR = newIndexR;
2250 self.twoPage.scaledWL = newWidthL;
2251 self.twoPage.scaledWR = newWidthR;
2252 self.twoPage.gutter = gutter;
2254 self.firstIndex = self.twoPage.currentIndexL;
2255 self.displayedIndices = [newIndexL, newIndexR];
2256 self.pruneUnusedImgs();
2258 self.animating = false;
2261 self.updateSearchHilites2UP();
2262 self.updatePageNumBox2UP();
2264 // self.twoPagePlaceFlipAreas(); // No longer used
2265 self.setMouseHandlers2UP();
2266 self.twoPageSetCursor();
2268 if (self.animationFinishedCallback) {
2269 self.animationFinishedCallback();
2270 self.animationFinishedCallback = null;
2276 // setMouseHandlers2UP
2277 //______________________________________________________________________________
2278 BookReader.prototype.setMouseHandlers2UP = function() {
2279 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
2287 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
2290 e.data.self.right();
2297 //______________________________________________________________________________
2298 BookReader.prototype.prefetchImg = function(index) {
2299 var pageURI = this._getPageURI(index);
2301 // Load image if not loaded or URI has changed (e.g. due to scaling)
2302 var loadImage = false;
2303 if (undefined == this.prefetchedImgs[index]) {
2304 //console.log('no image for ' + index);
2306 } else if (pageURI != this.prefetchedImgs[index].uri) {
2307 //console.log('uri changed for ' + index);
2312 //console.log('prefetching ' + index);
2313 var img = document.createElement("img");
2314 img.className = 'BRpageimage';
2315 if (index < 0 || index > (this.numLeafs - 1) ) {
2316 // Facing page at beginning or end, or beyond
2318 'background-color': 'transparent'
2322 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
2323 this.prefetchedImgs[index] = img;
2328 // prepareFlipLeftToRight()
2330 //______________________________________________________________________________
2332 // Prepare to flip the left page towards the right. This corresponds to moving
2333 // backward when the page progression is left to right.
2334 BookReader.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
2336 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
2338 this.prefetchImg(prevL);
2339 this.prefetchImg(prevR);
2341 var height = this._getPageHeight(prevL);
2342 var width = this._getPageWidth(prevL);
2343 var middle = this.twoPage.middle;
2344 var top = this.twoPageTop();
2345 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
2347 // The gutter is the dividing line between the left and right pages.
2348 // It is offset from the middle to create the illusion of thickness to the pages
2349 var gutter = middle + this.gutterOffsetForIndex(prevL);
2351 //console.log(' gutter for ' + prevL + ' is ' + gutter);
2352 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
2353 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
2356 position: 'absolute',
2357 left: gutter-scaledW+'px',
2358 right: '', // clear right property
2360 height: this.twoPage.height,
2361 width: scaledW+'px',
2362 borderRight: '1px solid black',
2366 $(this.prefetchedImgs[prevL]).css(leftCSS);
2368 $('#BRtwopageview').append(this.prefetchedImgs[prevL]);
2370 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
2373 position: 'absolute',
2377 height: this.twoPage.height,
2379 borderLeft: '1px solid black',
2383 $(this.prefetchedImgs[prevR]).css(rightCSS);
2385 $('#BRtwopageview').append(this.prefetchedImgs[prevR]);
2389 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
2390 // prepareFlipRightToLeft()
2391 //______________________________________________________________________________
2392 BookReader.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
2394 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
2397 this.prefetchImg(nextL);
2398 this.prefetchImg(nextR);
2400 var height = this._getPageHeight(nextR);
2401 var width = this._getPageWidth(nextR);
2402 var middle = this.twoPage.middle;
2403 var top = this.twoPageTop();
2404 var scaledW = this.twoPage.height*width/height;
2406 var gutter = middle + this.gutterOffsetForIndex(nextL);
2408 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
2409 $(this.prefetchedImgs[nextR]).css({
2410 position: 'absolute',
2413 height: this.twoPage.height,
2414 width: scaledW+'px',
2415 borderLeft: '1px solid black',
2419 $('#BRtwopageview').append(this.prefetchedImgs[nextR]);
2421 height = this._getPageHeight(nextL);
2422 width = this._getPageWidth(nextL);
2423 scaledW = this.twoPage.height*width/height;
2425 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#BRcontainer').width()-gutter);
2426 $(this.prefetchedImgs[nextL]).css({
2427 position: 'absolute',
2428 right: $('#BRtwopageview').attr('clientWidth')-gutter+'px',
2430 height: this.twoPage.height,
2431 width: 0+'px', // Start at 0 width, then grow to the left
2432 borderRight: '1px solid black',
2436 $('#BRtwopageview').append(this.prefetchedImgs[nextL]);
2440 // getNextLeafs() -- NOT RTL AWARE
2441 //______________________________________________________________________________
2442 // BookReader.prototype.getNextLeafs = function(o) {
2443 // //TODO: we might have two left or two right leafs in a row (damaged book)
2444 // //For now, assume that leafs are contiguous.
2446 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2447 // o.L = this.twoPage.currentIndexL+2;
2448 // o.R = this.twoPage.currentIndexL+3;
2451 // getprevLeafs() -- NOT RTL AWARE
2452 //______________________________________________________________________________
2453 // BookReader.prototype.getPrevLeafs = function(o) {
2454 // //TODO: we might have two left or two right leafs in a row (damaged book)
2455 // //For now, assume that leafs are contiguous.
2457 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2458 // o.L = this.twoPage.currentIndexL-2;
2459 // o.R = this.twoPage.currentIndexL-1;
2462 // pruneUnusedImgs()
2463 //______________________________________________________________________________
2464 BookReader.prototype.pruneUnusedImgs = function() {
2465 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2466 for (var key in this.prefetchedImgs) {
2467 //console.log('key is ' + key);
2468 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2469 //console.log('removing key '+ key);
2470 $(this.prefetchedImgs[key]).remove();
2472 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2473 //console.log('deleting key '+ key);
2474 delete this.prefetchedImgs[key];
2480 //______________________________________________________________________________
2481 BookReader.prototype.prefetch = function() {
2483 // $$$ We should check here if the current indices have finished
2484 // loading (with some timeout) before loading more page images
2485 // See https://bugs.edge.launchpad.net/bookreader/+bug/511391
2487 // prefetch visible pages first
2488 this.prefetchImg(this.twoPage.currentIndexL);
2489 this.prefetchImg(this.twoPage.currentIndexR);
2491 var adjacentPagesToLoad = 3;
2493 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2494 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2496 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2497 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2499 // Load images spreading out from current
2500 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2501 var goingDown = lowCurrent - i;
2502 if (goingDown >= start) {
2503 this.prefetchImg(goingDown);
2505 var goingUp = highCurrent + i;
2506 if (goingUp <= end) {
2507 this.prefetchImg(goingUp);
2512 var lim = this.twoPage.currentIndexL-4;
2514 lim = Math.max(lim, 0);
2515 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2516 this.prefetchImg(i);
2519 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2520 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2521 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2522 this.prefetchImg(i);
2528 // getPageWidth2UP()
2529 //______________________________________________________________________________
2530 BookReader.prototype.getPageWidth2UP = function(index) {
2531 // We return the width based on the dominant height
2532 var height = this._getPageHeight(index);
2533 var width = this._getPageWidth(index);
2534 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2538 //______________________________________________________________________________
2539 BookReader.prototype.search = function(term) {
2540 term = term.replace(/\//g, ' '); // strip slashes
2541 this.searchTerm = term;
2542 $('#BookReaderSearchScript').remove();
2543 var script = document.createElement("script");
2544 script.setAttribute('id', 'BookReaderSearchScript');
2545 script.setAttribute("type", "text/javascript");
2546 script.setAttribute("src", 'http://'+this.server+'/BookReader/flipbook_search_br.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=br.BRSearchCallback');
2547 document.getElementsByTagName('head')[0].appendChild(script);
2548 $('#BookReaderSearchBox').val(term);
2549 $('#BookReaderSearchResults').html('Searching...');
2552 // BRSearchCallback()
2553 //______________________________________________________________________________
2554 BookReader.prototype.BRSearchCallback = function(txt) {
2556 if (jQuery.browser.msie) {
2557 var dom=new ActiveXObject("Microsoft.XMLDOM");
2561 var parser = new DOMParser();
2562 var dom = parser.parseFromString(txt, "text/xml");
2565 $('#BookReaderSearchResults').empty();
2566 $('#BookReaderSearchResults').append('<ul>');
2568 for (var key in this.searchResults) {
2569 if (null != this.searchResults[key].div) {
2570 $(this.searchResults[key].div).remove();
2572 delete this.searchResults[key];
2575 var pages = dom.getElementsByTagName('PAGE');
2577 if (0 == pages.length) {
2578 // $$$ it would be nice to echo the (sanitized) search result here
2579 $('#BookReaderSearchResults').append('<li>No search results found</li>');
2581 for (var i = 0; i < pages.length; i++){
2582 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2585 var re = new RegExp (/_(\d{4})\.djvu/);
2586 var reMatch = re.exec(pages[i].getAttribute('file'));
2587 var index = parseInt(reMatch[1], 10);
2588 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2590 var children = pages[i].childNodes;
2592 for (var j=0; j<children.length; j++) {
2593 //console.log(j + ' - ' + children[j].nodeName);
2594 //console.log(children[j].firstChild.nodeValue);
2595 if ('CONTEXT' == children[j].nodeName) {
2596 context += children[j].firstChild.nodeValue;
2597 } else if ('WORD' == children[j].nodeName) {
2598 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2600 var index = this.leafNumToIndex(index);
2601 if (null != index) {
2602 //coordinates are [left, bottom, right, top, [baseline]]
2603 //we'll skip baseline for now...
2604 var coords = children[j].getAttribute('coords').split(',',4);
2605 if (4 == coords.length) {
2606 this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
2611 var pageName = this.getPageName(index);
2612 var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
2613 var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
2614 //TODO: remove hardcoded instance name
2615 $('#BookReaderSearchResults').append('<li><b><a href="javascript:br.jumpToIndex('+index+','+middleX+','+middleY+');">' + pageName + '</a></b> - ' + context + '</li>');
2618 $('#BookReaderSearchResults').append('</ul>');
2620 // $$$ update again for case of loading search URL in new browser window (search box may not have been ready yet)
2621 $('#BookReaderSearchBox').val(this.searchTerm);
2623 this.updateSearchHilites();
2626 // updateSearchHilites()
2627 //______________________________________________________________________________
2628 BookReader.prototype.updateSearchHilites = function() {
2629 if (2 == this.mode) {
2630 this.updateSearchHilites2UP();
2632 this.updateSearchHilites1UP();
2636 // showSearchHilites1UP()
2637 //______________________________________________________________________________
2638 BookReader.prototype.updateSearchHilites1UP = function() {
2640 for (var key in this.searchResults) {
2642 if (jQuery.inArray(parseInt(key), this.displayedIndices) >= 0) {
2643 var result = this.searchResults[key];
2644 if (null == result.div) {
2645 result.div = document.createElement('div');
2646 $(result.div).attr('className', 'BookReaderSearchHilite').appendTo('#pagediv'+key);
2647 //console.log('appending ' + key);
2650 width: (result.r-result.l)/this.reduce + 'px',
2651 height: (result.b-result.t)/this.reduce + 'px',
2652 left: (result.l)/this.reduce + 'px',
2653 top: (result.t)/this.reduce +'px'
2657 //console.log(key + ' not displayed');
2658 this.searchResults[key].div=null;
2664 //______________________________________________________________________________
2665 // Returns the position of the gutter (line between the page images)
2666 BookReader.prototype.twoPageGutter = function() {
2667 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2671 //______________________________________________________________________________
2672 // Returns the offset for the top of the page images
2673 BookReader.prototype.twoPageTop = function() {
2674 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2677 // twoPageCoverWidth()
2678 //______________________________________________________________________________
2679 // Returns the width of the cover div given the total page width
2680 BookReader.prototype.twoPageCoverWidth = function(totalPageWidth) {
2681 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2684 // twoPageGetViewCenter()
2685 //______________________________________________________________________________
2686 // Returns the percentage offset into twopageview div at the center of container div
2687 // { percentageX: float, percentageY: float }
2688 BookReader.prototype.twoPageGetViewCenter = function() {
2691 var containerOffset = $('#BRcontainer').offset();
2692 var viewOffset = $('#BRtwopageview').offset();
2693 center.percentageX = (containerOffset.left - viewOffset.left + ($('#BRcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2694 center.percentageY = (containerOffset.top - viewOffset.top + ($('#BRcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2699 // twoPageCenterView(percentageX, percentageY)
2700 //______________________________________________________________________________
2701 // Centers the point given by percentage from left,top of twopageview
2702 BookReader.prototype.twoPageCenterView = function(percentageX, percentageY) {
2703 if ('undefined' == typeof(percentageX)) {
2706 if ('undefined' == typeof(percentageY)) {
2710 var viewWidth = $('#BRtwopageview').width();
2711 var containerClientWidth = $('#BRcontainer').attr('clientWidth');
2712 var intoViewX = percentageX * viewWidth;
2714 var viewHeight = $('#BRtwopageview').height();
2715 var containerClientHeight = $('#BRcontainer').attr('clientHeight');
2716 var intoViewY = percentageY * viewHeight;
2718 if (viewWidth < containerClientWidth) {
2719 // Can fit width without scrollbars - center by adjusting offset
2720 $('#BRtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2722 // Need to scroll to center
2723 $('#BRtwopageview').css('left', 0);
2724 $('#BRcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2727 if (viewHeight < containerClientHeight) {
2728 // Fits with scrollbars - add offset
2729 $('#BRtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2731 $('#BRtwopageview').css('top', 0);
2732 $('#BRcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2736 // twoPageFlipAreaHeight
2737 //______________________________________________________________________________
2738 // Returns the integer height of the click-to-flip areas at the edges of the book
2739 BookReader.prototype.twoPageFlipAreaHeight = function() {
2740 return parseInt(this.twoPage.height);
2743 // twoPageFlipAreaWidth
2744 //______________________________________________________________________________
2745 // Returns the integer width of the flip areas
2746 BookReader.prototype.twoPageFlipAreaWidth = function() {
2747 var max = 100; // $$$ TODO base on view width?
2750 var width = this.twoPage.width * 0.15;
2751 return parseInt(BookReader.util.clamp(width, min, max));
2754 // twoPageFlipAreaTop
2755 //______________________________________________________________________________
2756 // Returns integer top offset for flip areas
2757 BookReader.prototype.twoPageFlipAreaTop = function() {
2758 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2761 // twoPageLeftFlipAreaLeft
2762 //______________________________________________________________________________
2763 // Left offset for left flip area
2764 BookReader.prototype.twoPageLeftFlipAreaLeft = function() {
2765 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2768 // twoPageRightFlipAreaLeft
2769 //______________________________________________________________________________
2770 // Left offset for right flip area
2771 BookReader.prototype.twoPageRightFlipAreaLeft = function() {
2772 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2775 // twoPagePlaceFlipAreas
2776 //______________________________________________________________________________
2777 // Readjusts position of flip areas based on current layout
2778 BookReader.prototype.twoPagePlaceFlipAreas = function() {
2779 // We don't set top since it shouldn't change relative to view
2780 $(this.twoPage.leftFlipArea).css({
2781 left: this.twoPageLeftFlipAreaLeft() + 'px',
2782 width: this.twoPageFlipAreaWidth() + 'px'
2784 $(this.twoPage.rightFlipArea).css({
2785 left: this.twoPageRightFlipAreaLeft() + 'px',
2786 width: this.twoPageFlipAreaWidth() + 'px'
2790 // showSearchHilites2UP()
2791 //______________________________________________________________________________
2792 BookReader.prototype.updateSearchHilites2UP = function() {
2794 for (var key in this.searchResults) {
2795 key = parseInt(key, 10);
2796 if (jQuery.inArray(key, this.displayedIndices) >= 0) {
2797 var result = this.searchResults[key];
2798 if (null == result.div) {
2799 result.div = document.createElement('div');
2800 $(result.div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
2801 //console.log('appending ' + key);
2804 this.setHilightCss2UP(result.div, key, result.l, result.r, result.t, result.b);
2807 //console.log(key + ' not displayed');
2808 if (null != this.searchResults[key].div) {
2809 //console.log('removing ' + key);
2810 $(this.searchResults[key].div).remove();
2812 this.searchResults[key].div=null;
2817 // setHilightCss2UP()
2818 //______________________________________________________________________________
2819 //position calculation shared between search and text-to-speech functions
2820 BookReader.prototype.setHilightCss2UP = function(div, index, left, right, top, bottom) {
2822 // We calculate the reduction factor for the specific page because it can be different
2823 // for each page in the spread
2824 var height = this._getPageHeight(index);
2825 var width = this._getPageWidth(index)
2826 var reduce = this.twoPage.height/height;
2827 var scaledW = parseInt(width*reduce);
2829 var gutter = this.twoPageGutter();
2831 if ('L' == this.getPageSide(index)) {
2832 pageL = gutter-scaledW;
2836 var pageT = this.twoPageTop();
2839 width: (right-left)*reduce + 'px',
2840 height: (bottom-top)*reduce + 'px',
2841 left: pageL+left*reduce + 'px',
2842 top: pageT+top*reduce +'px'
2846 // removeSearchHilites()
2847 //______________________________________________________________________________
2848 BookReader.prototype.removeSearchHilites = function() {
2849 for (var key in this.searchResults) {
2850 if (null != this.searchResults[key].div) {
2851 $(this.searchResults[key].div).remove();
2852 this.searchResults[key].div=null;
2858 //______________________________________________________________________________
2859 BookReader.prototype.printPage = function() {
2860 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2863 // Get print URI from current indices and mode
2864 BookReader.prototype.getPrintURI = function() {
2866 if (this.constMode2up == this.mode) {
2867 indexToPrint = this.twoPage.currentIndexL;
2869 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2872 var options = 'id=' + this.subPrefix + '&server=' + this.server + '&zip=' + this.zip
2873 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2874 + '&width=' + this._getPageWidth(indexToPrint) + '&height=' + this._getPageHeight(indexToPrint);
2876 if (this.constMode2up == this.mode) {
2877 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this._getPageWidth(this.twoPage.currentIndexR);
2878 options += '&height2=' + this._getPageHeight(this.twoPage.currentIndexR);
2879 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2881 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2884 return '/bookreader/print.php?' + options;
2887 /* iframe implementation
2888 BookReader.prototype.getPrintFrameContent = function(index) {
2889 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2890 // 8.5x11 so we should end up not overflowing on either paper size.
2891 var paperAspect = 8.5 / 11;
2892 var imageAspect = this._getPageWidth(index) / this._getPageHeight(index);
2896 // Rotate if possible and appropriate, to get larger image size on printed page
2897 if (this.canRotatePage(index)) {
2898 if (imageAspect > 1 && imageAspect > paperAspect) {
2899 // more wide than square, and more wide than paper
2901 imageAspect = 1/imageAspect;
2906 if (imageAspect > paperAspect) {
2907 // wider than paper, fit width
2908 fitAttrs = 'width="95%"';
2910 // taller than paper, fit height
2911 fitAttrs = 'height="95%"';
2914 var imageURL = this._getPageURI(index, 1, rotate);
2915 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2916 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2917 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2918 iframeStr += '</div>';
2919 iframeStr += '</body></html>';
2924 BookReader.prototype.updatePrintFrame = function(delta) {
2925 var newIndex = this.indexToPrint + delta;
2926 newIndex = BookReader.util.clamp(newIndex, 0, this.numLeafs - 1);
2927 if (newIndex == this.indexToPrint) {
2930 this.indexToPrint = newIndex;
2931 var doc = BookReader.util.getIFrameDocument($('#printFrame')[0]);
2932 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2937 //______________________________________________________________________________
2938 BookReader.prototype.showEmbedCode = function() {
2939 if (null != this.embedPopup) { // check if already showing
2943 this.embedPopup = document.createElement("div");
2944 $(this.embedPopup).css({
2945 position: 'absolute',
2947 left: ($('#BRcontainer').attr('clientWidth')-400)/2 + 'px',
2950 border: "3px double #999999",
2952 backgroundColor: "#fff"
2953 }).appendTo('#BookReader');
2955 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
2956 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>';
2957 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
2958 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2960 this.embedPopup.innerHTML = htmlStr;
2961 $(this.embedPopup).find('input').bind('click', function() {
2967 //______________________________________________________________________________
2968 BookReader.prototype.autoToggle = function() {
2970 var bComingFrom1up = false;
2971 if (2 != this.mode) {
2972 bComingFrom1up = true;
2976 // Change to autofit if book is too large
2977 if (this.reduce < this.twoPageGetAutofitReduce()) {
2978 this.zoom2up('auto');
2982 if (null == this.autoTimer) {
2983 this.flipSpeed = 2000;
2985 // $$$ Draw events currently cause layout problems when they occur during animation.
2986 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
2987 // we workaround for now by not triggering immediate animation in that case.
2988 // See https://bugs.launchpad.net/gnubook/+bug/328327
2989 if (('rl' == this.pageProgression) && bComingFrom1up) {
2990 // don't flip immediately -- wait until timer fires
2993 this.flipFwdToIndex();
2996 $('#BRtoolbar .play').hide();
2997 $('#BRtoolbar .pause').show();
2998 this.autoTimer=setInterval(function(){
2999 if (self.animating) {return;}
3001 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
3002 self.flipBackToIndex(1); // $$$ really what we want?
3004 self.flipFwdToIndex();
3013 //______________________________________________________________________________
3014 // Stop autoplay mode, allowing animations to finish
3015 BookReader.prototype.autoStop = function() {
3016 if (null != this.autoTimer) {
3017 clearInterval(this.autoTimer);
3018 this.flipSpeed = 'fast';
3019 $('#BRtoolbar .pause').hide();
3020 $('#BRtoolbar .play').show();
3021 this.autoTimer = null;
3025 // stopFlipAnimations
3026 //______________________________________________________________________________
3027 // Immediately stop flip animations. Callbacks are triggered.
3028 BookReader.prototype.stopFlipAnimations = function() {
3030 this.autoStop(); // Clear timers
3032 // Stop animation, clear queue, trigger callbacks
3033 if (this.leafEdgeTmp) {
3034 $(this.leafEdgeTmp).stop(false, true);
3036 jQuery.each(this.prefetchedImgs, function() {
3037 $(this).stop(false, true);
3040 // And again since animations also queued in callbacks
3041 if (this.leafEdgeTmp) {
3042 $(this.leafEdgeTmp).stop(false, true);
3044 jQuery.each(this.prefetchedImgs, function() {
3045 $(this).stop(false, true);
3050 // keyboardNavigationIsDisabled(event)
3051 // - returns true if keyboard navigation should be disabled for the event
3052 //______________________________________________________________________________
3053 BookReader.prototype.keyboardNavigationIsDisabled = function(event) {
3054 if (event.target.tagName == "INPUT") {
3060 // gutterOffsetForIndex
3061 //______________________________________________________________________________
3063 // Returns the gutter offset for the spread containing the given index.
3064 // This function supports RTL
3065 BookReader.prototype.gutterOffsetForIndex = function(pindex) {
3067 // To find the offset of the gutter from the middle we calculate our percentage distance
3068 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
3069 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
3071 // But then again for RTL it's the opposite
3072 if ('rl' == this.pageProgression) {
3080 //______________________________________________________________________________
3081 // Returns the width of the leaf edge div for the page with index given
3082 BookReader.prototype.leafEdgeWidth = function(pindex) {
3083 // $$$ could there be single pixel rounding errors for L vs R?
3084 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
3085 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3087 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3091 // jumpIndexForLeftEdgePageX
3092 //______________________________________________________________________________
3093 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
3094 BookReader.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
3095 if ('rl' != this.pageProgression) {
3096 // LTR - flipping backward
3097 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3099 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
3100 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
3104 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3105 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
3110 // jumpIndexForRightEdgePageX
3111 //______________________________________________________________________________
3112 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
3113 BookReader.prototype.jumpIndexForRightEdgePageX = function(pageX) {
3114 if ('rl' != this.pageProgression) {
3116 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
3117 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
3120 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
3121 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
3126 BookReader.prototype.initToolbar = function(mode, ui) {
3128 $("#BookReader").append("<div id='BRtoolbar'>"
3129 + "<span id='BRtoolbarbuttons' style='float: right'>"
3130 + "<button class='BRicon rollover read_aloud' onclick='br.ttsStart(); return false;'/>"
3131 + "<button class='BRicon print rollover' /> <button class='BRicon rollover embed' />"
3132 + "<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>"
3133 + "<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>"
3134 + "<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>"
3135 + "<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>"
3136 + "<button class='BRicon rollover play' /><button class='BRicon rollover pause' style='display: none' />"
3140 + "<a class='BRicon logo rollover' href='" + this.logoURL + "'> </a>"
3141 + " <button class='BRicon rollover zoom_out' onclick='br.zoom(-1); return false;'/>"
3142 + "<button class='BRicon rollover zoom_in' onclick='br.zoom(1); return false;'/>"
3143 + " <span class='label'>Zoom: <span id='BRzoom'>"+parseInt(100/this.reduce)+"</span></span>"
3144 + " <button class='BRicon rollover one_page_mode' onclick='br.switchMode(1); return false;'/>"
3145 + " <button class='BRicon rollover two_page_mode' onclick='br.switchMode(2); return false;'/>"
3146 + " <button class='BRicon rollover thumbnail_mode' onclick='br.switchMode(3); return false;'/>"
3149 + "<span id='#BRbooktitle'>"
3150 + " <a class='BRblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
3154 this.updateToolbarZoom(this.reduce); // Pretty format
3156 if (ui == "embed" || ui == "touch") {
3157 $("#BookReader a.logo").attr("target","_blank");
3160 // $$$ turn this into a member variable
3161 var jToolbar = $('#BRtoolbar'); // j prefix indicates jQuery object
3163 // We build in mode 2
3166 this.bindToolbarNavHandlers(jToolbar);
3168 // Setup tooltips -- later we could load these from a file for i18n
3169 var titles = { '.logo': 'Go to Archive.org',
3170 '.zoom_in': 'Zoom in',
3171 '.zoom_out': 'Zoom out',
3172 '.one_page_mode': 'One-page view',
3173 '.two_page_mode': 'Two-page view',
3174 '.thumbnail_mode': 'Thumbnail view',
3175 '.print': 'Print this page',
3176 '.embed': 'Embed bookreader',
3177 '.book_left': 'Flip left',
3178 '.book_right': 'Flip right',
3179 '.book_up': 'Page up',
3180 '.book_down': 'Page down',
3183 '.book_top': 'First page',
3184 '.book_bottom': 'Last page'
3186 if ('rl' == this.pageProgression) {
3187 titles['.book_leftmost'] = 'Last page';
3188 titles['.book_rightmost'] = 'First page';
3190 titles['.book_leftmost'] = 'First page';
3191 titles['.book_rightmost'] = 'Last page';
3194 for (var icon in titles) {
3195 jToolbar.find(icon).attr('title', titles[icon]);
3198 // Hide mode buttons and autoplay if 2up is not available
3199 // $$$ if we end up with more than two modes we should show the applicable buttons
3200 if ( !this.canSwitchToMode(this.constMode2up) ) {
3201 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
3204 // Switch to requested mode -- binds other click handlers
3205 this.switchToolbarMode(mode);
3210 // switchToolbarMode
3211 //______________________________________________________________________________
3212 // Update the toolbar for the given mode (changes navigation buttons)
3213 // $$$ we should soon split the toolbar out into its own module
3214 BookReader.prototype.switchToolbarMode = function(mode) {
3217 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3218 $('#BRtoolbar .BRtoolbarmode2').hide();
3219 $('#BRtoolbar .BRtoolbarmode3').hide();
3220 $('#BRtoolbar .BRtoolbarmode1').show().css('display', 'inline');
3221 } else if (2 == mode) {
3223 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3224 $('#BRtoolbar .BRtoolbarmode1').hide();
3225 $('#BRtoolbar .BRtoolbarmode3').hide();
3226 $('#BRtoolbar .BRtoolbarmode2').show().css('display', 'inline');
3229 $('#BRtoolbar .BRtoolbarzoom').hide();
3230 $('#BRtoolbar .BRtoolbarmode2').hide();
3231 $('#BRtoolbar .BRtoolbarmode1').hide();
3232 $('#BRtoolbar .BRtoolbarmode3').show().css('display', 'inline');
3236 // bindToolbarNavHandlers
3237 //______________________________________________________________________________
3238 // Binds the toolbar handlers
3239 BookReader.prototype.bindToolbarNavHandlers = function(jToolbar) {
3241 var self = this; // closure
3243 jToolbar.find('.book_left').bind('click', function(e) {
3248 jToolbar.find('.book_right').bind('click', function(e) {
3253 jToolbar.find('.book_up').bind('click', function(e) {
3254 if ($.inArray(self.mode, [self.constMode1up, self.constModeThumb]) >= 0) {
3262 jToolbar.find('.book_down').bind('click', function(e) {
3263 if ($.inArray(self.mode, [self.constMode1up, self.constModeThumb]) >= 0) {
3271 jToolbar.find('.print').bind('click', function(e) {
3276 jToolbar.find('.embed').bind('click', function(e) {
3277 self.showEmbedCode();
3281 jToolbar.find('.play').bind('click', function(e) {
3286 jToolbar.find('.pause').bind('click', function(e) {
3291 jToolbar.find('.book_top').bind('click', function(e) {
3296 jToolbar.find('.book_bottom').bind('click', function(e) {
3301 jToolbar.find('.book_leftmost').bind('click', function(e) {
3306 jToolbar.find('.book_rightmost').bind('click', function(e) {
3312 // updateToolbarZoom(reduce)
3313 //______________________________________________________________________________
3314 // Update the displayed zoom factor based on reduction factor
3315 BookReader.prototype.updateToolbarZoom = function(reduce) {
3319 // $$$ TODO preserve zoom/fit for each mode
3320 if (this.mode == this.constMode2up) {
3321 autofit = this.twoPage.autofit;
3323 autofit = this.onePage.autofit;
3327 value = autofit.slice(0,1).toUpperCase() + autofit.slice(1);
3329 value = (100 / reduce).toFixed(2);
3330 // Strip trailing zeroes and decimal if all zeroes
3331 value = value.replace(/0+$/,'');
3332 value = value.replace(/\.$/,'');
3335 $('#BRzoom').text(value);
3338 // firstDisplayableIndex
3339 //______________________________________________________________________________
3340 // Returns the index of the first visible page, dependent on the mode.
3341 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3342 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
3343 BookReader.prototype.firstDisplayableIndex = function() {
3344 if (this.mode != this.constMode2up) {
3348 if ('rl' != this.pageProgression) {
3350 if (this.getPageSide(0) == 'L') {
3357 if (this.getPageSide(0) == 'R') {
3365 // lastDisplayableIndex
3366 //______________________________________________________________________________
3367 // Returns the index of the last visible page, dependent on the mode.
3368 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3369 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
3370 BookReader.prototype.lastDisplayableIndex = function() {
3372 var lastIndex = this.numLeafs - 1;
3374 if (this.mode != this.constMode2up) {
3378 if ('rl' != this.pageProgression) {
3380 if (this.getPageSide(lastIndex) == 'R') {
3383 return lastIndex + 1;
3387 if (this.getPageSide(lastIndex) == 'L') {
3390 return lastIndex + 1;
3395 // shortTitle(maximumCharacters)
3397 // Returns a shortened version of the title with the maximum number of characters
3398 BookReader.prototype.shortTitle = function(maximumCharacters) {
3399 if (this.bookTitle.length < maximumCharacters) {
3400 return this.bookTitle;
3403 var title = this.bookTitle.substr(0, maximumCharacters - 3);
3408 // Parameter related functions
3410 // updateFromParams(params)
3412 // Update ourselves from the params object.
3414 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
3415 BookReader.prototype.updateFromParams = function(params) {
3416 if ('undefined' != typeof(params.mode)) {
3417 this.switchMode(params.mode);
3421 if ('undefined' != typeof(params.searchTerm)) {
3422 if (this.searchTerm != params.searchTerm) {
3423 this.search(params.searchTerm);
3427 // $$$ process /zoom
3429 // We only respect page if index is not set
3430 if ('undefined' != typeof(params.index)) {
3431 if (params.index != this.currentIndex()) {
3432 this.jumpToIndex(params.index);
3434 } else if ('undefined' != typeof(params.page)) {
3435 // $$$ this assumes page numbers are unique
3436 if (params.page != this.getPageNum(this.currentIndex())) {
3437 this.jumpToPage(params.page);
3441 // $$$ process /region
3442 // $$$ process /highlight
3445 // paramsFromFragment(urlFragment)
3447 // Returns a object with configuration parametes from a URL fragment.
3449 // E.g paramsFromFragment(window.location.hash)
3450 BookReader.prototype.paramsFromFragment = function(urlFragment) {
3451 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
3455 // For convenience we allow an initial # character (as from window.location.hash)
3456 // but don't require it
3457 if (urlFragment.substr(0,1) == '#') {
3458 urlFragment = urlFragment.substr(1);
3461 // Simple #nn syntax
3462 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3463 if ( !isNaN(oldStyleLeafNum) ) {
3464 params.index = oldStyleLeafNum;
3466 // Done processing if using old-style syntax
3470 // Split into key-value pairs
3471 var urlArray = urlFragment.split('/');
3473 for (var i = 0; i < urlArray.length; i += 2) {
3474 urlHash[urlArray[i]] = urlArray[i+1];
3478 if ('1up' == urlHash['mode']) {
3479 params.mode = this.constMode1up;
3480 } else if ('2up' == urlHash['mode']) {
3481 params.mode = this.constMode2up;
3482 } else if ('thumb' == urlHash['mode']) {
3483 params.mode = this.constModeThumb;
3487 if ('undefined' != typeof(urlHash['page'])) {
3488 // page was set -- may not be int
3489 params.page = urlHash['page'];
3492 // $$$ process /region
3493 // $$$ process /search
3495 if (urlHash['search'] != undefined) {
3496 params.searchTerm = BookReader.util.decodeURIComponentPlus(urlHash['search']);
3499 // $$$ process /highlight
3504 // paramsFromCurrent()
3506 // Create a params object from the current parameters.
3507 BookReader.prototype.paramsFromCurrent = function() {
3511 var index = this.currentIndex();
3512 var pageNum = this.getPageNum(index);
3513 if ((pageNum === 0) || pageNum) {
3514 params.page = pageNum;
3517 params.index = index;
3518 params.mode = this.mode;
3524 if (this.searchHighlightVisible()) {
3525 params.searchTerm = this.searchTerm;
3531 // fragmentFromParams(params)
3533 // Create a fragment string from the params object.
3534 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3535 BookReader.prototype.fragmentFromParams = function(params) {
3536 var separator = '/';
3540 if ('undefined' != typeof(params.page)) {
3541 fragments.push('page', params.page);
3543 // Don't have page numbering -- use index instead
3544 fragments.push('page', 'n' + params.index);
3551 if ('undefined' != typeof(params.mode)) {
3552 if (params.mode == this.constMode1up) {
3553 fragments.push('mode', '1up');
3554 } else if (params.mode == this.constMode2up) {
3555 fragments.push('mode', '2up');
3556 } else if (params.mode == this.constModeThumb) {
3557 fragments.push('mode', 'thumb');
3559 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3564 if (params.searchTerm) {
3565 fragments.push('search', params.searchTerm);
3568 return BookReader.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3571 // getPageIndex(pageNum)
3573 // Returns the *highest* index the given page number, or undefined
3574 BookReader.prototype.getPageIndex = function(pageNum) {
3575 var pageIndices = this.getPageIndices(pageNum);
3577 if (pageIndices.length > 0) {
3578 return pageIndices[pageIndices.length - 1];
3584 // getPageIndices(pageNum)
3586 // Returns an array (possibly empty) of the indices with the given page number
3587 BookReader.prototype.getPageIndices = function(pageNum) {
3590 // Check for special "nXX" page number
3591 if (pageNum.slice(0,1) == 'n') {
3593 var pageIntStr = pageNum.slice(1, pageNum.length);
3594 var pageIndex = parseInt(pageIntStr);
3595 indices.push(pageIndex);
3598 // Do nothing... will run through page names and see if one matches
3603 for (i=0; i<this.numLeafs; i++) {
3604 if (this.getPageNum(i) == pageNum) {
3612 // getPageName(index)
3614 // Returns the name of the page as it should be displayed in the user interface
3615 BookReader.prototype.getPageName = function(index) {
3616 return 'Page ' + this.getPageNum(index);
3619 // updateLocationHash
3621 // Update the location hash from the current parameters. Call this instead of manually
3622 // using window.location.replace
3623 BookReader.prototype.updateLocationHash = function() {
3624 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3625 window.location.replace(newHash);
3627 // This is the variable checked in the timer. Only user-generated changes
3628 // to the URL will trigger the event.
3629 this.oldLocationHash = newHash;
3632 // startLocationPolling
3634 // Starts polling of window.location to see hash fragment changes
3635 BookReader.prototype.startLocationPolling = function() {
3636 var self = this; // remember who I am
3637 self.oldLocationHash = window.location.hash;
3639 if (this.locationPollId) {
3640 clearInterval(this.locationPollID);
3641 this.locationPollId = null;
3644 this.locationPollId = setInterval(function() {
3645 var newHash = window.location.hash;
3646 if (newHash != self.oldLocationHash) {
3647 if (newHash != self.oldUserHash) { // Only process new user hash once
3648 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3650 // Queue change if animating
3651 if (self.animating) {
3653 self.animationFinishedCallback = function() {
3654 self.updateFromParams(self.paramsFromFragment(newHash));
3656 } else { // update immediately
3657 self.updateFromParams(self.paramsFromFragment(newHash));
3659 self.oldUserHash = newHash;
3667 // Returns true if we can switch to the requested mode
3668 BookReader.prototype.canSwitchToMode = function(mode) {
3669 if (mode == this.constMode2up) {
3670 // check there are enough pages to display
3671 // $$$ this is a workaround for the mis-feature that we can't display
3672 // short books in 2up mode
3673 if (this.numLeafs < 6) {
3681 // searchHighlightVisible
3683 // Returns true if a search highlight is currently being displayed
3684 BookReader.prototype.searchHighlightVisible = function() {
3685 if (this.constMode2up == this.mode) {
3686 if (this.searchResults[this.twoPage.currentIndexL]
3687 || this.searchResults[this.twoPage.currentIndexR]) {
3691 if (this.searchResults[this.currentIndex()]) {
3700 // Returns the page width for the given index, or first or last page if out of range
3701 BookReader.prototype._getPageWidth = function(index) {
3702 // Synthesize a page width for pages not actually present in book.
3703 // May or may not be the best approach.
3704 // If index is out of range we return the width of first or last page
3705 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3706 return this.getPageWidth(index);
3711 // Returns the page height for the given index, or first or last page if out of range
3712 BookReader.prototype._getPageHeight= function(index) {
3713 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3714 return this.getPageHeight(index);
3719 // Returns the page URI or transparent image if out of range
3720 BookReader.prototype._getPageURI = function(index, reduce, rotate) {
3721 if (index < 0 || index >= this.numLeafs) { // Synthesize page
3722 return this.imagesBaseURL + "/transparent.png";
3725 if ('undefined' == typeof(reduce)) {
3726 // reduce not passed in
3727 // $$$ this probably won't work for thumbnail mode
3728 var ratio = this.getPageHeight(index) / this.twoPage.height;
3730 // $$$ we make an assumption here that the scales are available pow2 (like kakadu)
3733 } else if (ratio < 4) {
3735 } else if (ratio < 8) {
3737 } else if (ratio < 16) {
3739 } else if (ratio < 32) {
3747 return this.getPageURI(index, reduce, rotate);
3750 // Library functions
3752 disableSelect: function(jObject) {
3753 // Bind mouse handlers
3754 // Disable mouse click to avoid selected/highlighted page images - bug 354239
3755 jObject.bind('mousedown', function(e) {
3756 // $$$ check here for right-click and don't disable. Also use jQuery style
3757 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
3760 // Special hack for IE7
3761 jObject[0].onselectstart = function(e) { return false; };
3764 clamp: function(value, min, max) {
3765 return Math.min(Math.max(value, min), max);
3768 notInArray: function(value, array) {
3769 // inArray returns -1 or undefined if value not in array
3770 return ! (jQuery.inArray(value, array) >= 0);
3773 getIFrameDocument: function(iframe) {
3774 // Adapted from http://xkr.us/articles/dom/iframe-document/
3775 var outer = (iframe.contentWindow || iframe.contentDocument);
3776 return (outer.document || outer);
3779 decodeURIComponentPlus: function(value) {
3780 // Decodes a URI component and converts '+' to ' '
3781 return decodeURIComponent(value).replace(/\+/g, ' ');
3784 encodeURIComponentPlus: function(value) {
3785 // Encodes a URI component and converts ' ' to '+'
3786 return encodeURIComponent(value).replace(/%20/g, '+');
3788 // The final property here must NOT have a comma after it - IE7
3793 //______________________________________________________________________________
3794 BookReader.prototype.ttsStart = function () {
3795 console.log('starting readAloud');
3796 var url = 'http://'+this.server+'/BookReader/BookReaderGetTextWrapper.php?path='+this.bookPath+'_djvu.xml&page='+this.currentIndex();
3797 console.log('url is ' + url);
3798 $.ajax({url:url, dataType:'jsonp'});
3801 // ttsGetTextCB(): text-to-speech callback
3802 //______________________________________________________________________________
3803 BookReader.prototype.ttsGetTextCB = function (data) {
3804 console.log('ttsGetTextCB got data:');
3806 this.ttsChunks = data;
3807 this.ttsHilites = [];
3808 //$.ajax({url:'http://'+this.ttsServer+'/renderAudio.py', data:{string:data[0][0], format:'ogg'}, dataType:'json'});
3810 this.ttsPosition = -1;
3811 var snd = soundManager.createSound({
3813 //url: 'http://home.us.archive.org/~rkumar/arctic.ogg',
3814 url: 'http://home.us.archive.org/~rkumar/getOgg.php?string=' + escape(data[0][0]) + '&f=.ogg', //the .ogg is to trick SoundManager2 to use the HTML5 audio player
3819 this.ttsNextChunk();
3823 //______________________________________________________________________________
3824 BookReader.prototype.ttsNextChunk = function () {
3826 console.log(this.ttsPosition);
3828 console.log('next chunk is ');
3829 console.log(this.ttsPosition);
3831 if (this.ttsPosition >= this.ttsChunks.length) {
3832 console.log('tts stop');
3836 var chunk = this.ttsChunks[this.ttsPosition];
3838 //remove old hilights
3839 $(this.ttsHilites).remove();
3840 this.ttsHilites = [];
3842 if (2 == this.mode) {
3843 this.ttsHilite2UP(chunk);
3845 alert('only 2 page mode supported for TTS..');
3848 //preload next chunk
3849 var nextPos = this.ttsPosition+1;
3850 if (nextPos < this.ttsChunks.length) {
3851 var snd = soundManager.createSound({
3852 id: 'chunk'+nextPos,
3853 url: 'http://home.us.archive.org/~rkumar/getOgg.php?string=' + escape(this.ttsChunks[nextPos][0]) + '&f=.ogg', //the .ogg is to trick SoundManager2 to use the HTML5 audio player
3854 //url: 'http://home.us.archive.org/~rkumar/arctic.ogg',
3861 //play current chunk
3863 var foo = function() {console.log(this.br); br.ttsNextChunk();}
3864 soundManager.play('chunk'+this.ttsPosition,{onfinish:foo});
3869 //______________________________________________________________________________
3870 BookReader.prototype.ttsHilite2UP = function (chunk) {
3872 for (i=0; i<chunk.length; i++) {
3873 //each rect is an array of l,b,r,t coords (djvu.xml ordering...)
3874 var l = chunk[i][0];
3875 var b = chunk[i][1];
3876 var r = chunk[i][2];
3877 var t = chunk[i][3];
3879 var div = document.createElement('div');
3880 this.ttsHilites.push(div);
3881 $(div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
3882 this.setHilightCss2UP(div, this.currentIndex(), l, r, t, b);