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 // Should be overriden (before init) by custom implmentations.
76 this.logoURL = 'http://www.archive.org/index.php';
78 // Base URL for UI images - should be overriden (before init) by
79 // custom implementations.
80 // $$$ This is the same directory as the images referenced by relative
81 // path in the CSS. Would be better to automagically find that path.
82 this.imagesBaseURL = '/bookreader/images/';
85 this.constMode1up = 1;
86 this.constMode2up = 2;
87 this.constModeThumb = 3;
90 // $$$ provide finer grained zooming
91 this.reductionFactors = [ {reduce: 0.5, autofit: null},
92 {reduce: 1, autofit: null},
93 {reduce: 2, autofit: null},
94 {reduce: 4, autofit: null},
95 {reduce: 8, autofit: null},
96 {reduce: 16, autofit: null} ];
98 // Object to hold parameters related to 1up mode
100 autofit: 'height' // valid values are height, width, none
103 // Object to hold parameters related to 2up mode
105 coverInternalPadding: 10, // Width of cover
106 coverExternalPadding: 10, // Padding outside of cover
107 bookSpineDivWidth: 30, // Width of book spine $$$ consider sizing based on book length
115 //______________________________________________________________________________
116 BookReader.prototype.init = function() {
118 var startIndex = undefined;
119 this.pageScale = this.reduce; // preserve current reduce
121 // Find start index and mode if set in location hash
122 var params = this.paramsFromFragment(window.location.hash);
124 // Sanitize/process parameters
126 if ( !this.canSwitchToMode( this.mode ) ) {
127 this.mode = this.constMode1up;
130 if ('undefined' != typeof(params.index)) {
131 startIndex = params.index;
132 } else if ('undefined' != typeof(params.page)) {
133 startIndex = this.getPageIndex(params.page);
136 if ('undefined' == typeof(startIndex)) {
137 if ('undefined' != typeof(this.titleLeaf)) {
138 // title leaf is known - but only use as default if book has a few pages
139 if (this.numLeafs > 2) {
140 startIndex = this.leafNumToIndex(this.titleLeaf);
145 if ('undefined' == typeof(startIndex)) {
149 if ('undefined' != typeof(params.mode)) {
150 this.mode = params.mode;
153 // Set document title -- may have already been set in enclosing html for
154 // search engine visibility
155 document.title = this.shortTitle(50);
157 $("#BookReader").empty();
159 this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
160 $("#BookReader").append("<div id='BRcontainer'></div>");
161 $("#BRcontainer").append("<div id='BRpageview'></div>");
163 $("#BRcontainer").bind('scroll', this, function(e) {
167 this.setupKeyListeners();
168 this.startLocationPolling();
170 $(window).bind('resize', this, function(e) {
171 //console.log('resize!');
172 if (1 == e.data.mode) {
173 //console.log('centering 1page view');
174 if (e.data.autofit) {
175 e.data.resizePageView();
177 e.data.centerPageView();
178 $('#BRpageview').empty()
179 e.data.displayedIndices = [];
180 e.data.updateSearchHilites(); //deletes hilights but does not call remove()
182 } else if (3 == e.data.mode){
183 e.data.prepareThumbnailView();
185 //console.log('drawing 2 page view');
187 // We only need to prepare again in autofit (size of spread changes)
188 if (e.data.twoPage.autofit) {
189 e.data.prepareTwoPageView();
191 // Re-center if the scrollbars have disappeared
192 var center = e.data.twoPageGetViewCenter();
193 var doRecenter = false;
194 if (e.data.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
195 center.percentageX = 0.5;
198 if (e.data.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
199 center.percentageY = 0.5;
203 e.data.twoPageCenterView(center.percentageX, center.percentageY);
209 $('.BRpagediv1up').bind('mousedown', this, function(e) {
210 // $$$ the purpose of this is to disable selection of the image (makes it turn blue)
211 // but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
215 // $$$ refactor this so it's enough to set the first index and call preparePageView
216 // (get rid of mode-specific logic at this point)
217 if (1 == this.mode) {
218 this.firstIndex = startIndex;
219 this.prepareOnePageView();
220 this.jumpToIndex(startIndex);
221 } else if (3 == this.mode) {
222 this.firstIndex = startIndex;
223 this.prepareThumbnailView();
224 this.jumpToIndex(startIndex);
226 //this.resizePageView();
228 this.displayedIndices=[0];
229 this.firstIndex = startIndex;
230 this.displayedIndices = [this.firstIndex];
231 //console.log('titleLeaf: %d', this.titleLeaf);
232 //console.log('displayedIndices: %s', this.displayedIndices);
233 this.prepareTwoPageView();
236 // Enact other parts of initial params
237 this.updateFromParams(params);
240 BookReader.prototype.setupKeyListeners = function() {
253 // We use document here instead of window to avoid a bug in jQuery on IE7
254 $(document).keydown(function(e) {
256 // Keyboard navigation
257 if (!self.keyboardNavigationIsDisabled(e)) {
261 // In 1up mode page scrolling is handled by browser
262 if (2 == self.mode) {
269 if (2 == self.mode) {
283 if (2 == self.mode) {
289 if (2 == self.mode) {
300 //______________________________________________________________________________
301 BookReader.prototype.drawLeafs = function() {
302 if (1 == this.mode) {
303 this.drawLeafsOnePage();
304 } else if (3 == this.mode) {
305 this.drawLeafsThumbnail();
307 this.drawLeafsTwoPage();
312 // bindGestures(jElement)
313 //______________________________________________________________________________
314 BookReader.prototype.bindGestures = function(jElement) {
316 jElement.unbind('gesturechange').bind('gesturechange', function(e) {
318 if (e.originalEvent.scale > 1.5) {
320 } else if (e.originalEvent.scale < 0.6) {
327 BookReader.prototype.setClickHandler2UP = function( element, data, handler) {
328 //console.log('setting handler');
329 //console.log(element.tagName);
331 $(element).unbind('tap').bind('tap', data, function(e) {
336 // drawLeafsOnePage()
337 //______________________________________________________________________________
338 BookReader.prototype.drawLeafsOnePage = function() {
339 //alert('drawing leafs!');
343 var scrollTop = $('#BRcontainer').attr('scrollTop');
344 var scrollBottom = scrollTop + $('#BRcontainer').height();
345 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
347 var indicesToDisplay = [];
352 for (i=0; i<this.numLeafs; i++) {
353 var height = parseInt(this._getPageHeight(i)/this.reduce);
355 leafBottom += height;
356 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
357 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
358 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
359 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
360 if (topInView | bottomInView | middleInView) {
361 //console.log('displayed: ' + this.displayedIndices);
362 //console.log('to display: ' + i);
363 indicesToDisplay.push(i);
365 leafTop += height +10;
369 var firstIndexToDraw = indicesToDisplay[0];
370 this.firstIndex = firstIndexToDraw;
372 // Update hash, but only if we're currently displaying a leaf
373 // Hack that fixes #365790
374 if (this.displayedIndices.length > 0) {
375 this.updateLocationHash();
378 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
380 indicesToDisplay.unshift(firstIndexToDraw);
383 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
384 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
385 indicesToDisplay.push(lastIndexToDraw+1);
390 for (i=0; i<firstIndexToDraw; i++) {
391 leafTop += parseInt(this._getPageHeight(i)/this.reduce) +10;
394 //var viewWidth = $('#BRpageview').width(); //includes scroll bar width
395 var viewWidth = $('#BRcontainer').attr('scrollWidth');
398 for (i=0; i<indicesToDisplay.length; i++) {
399 var index = indicesToDisplay[i];
400 var height = parseInt(this._getPageHeight(index)/this.reduce);
402 if (BookReader.util.notInArray(indicesToDisplay[i], this.displayedIndices)) {
403 var width = parseInt(this._getPageWidth(index)/this.reduce);
404 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
405 var div = document.createElement("div");
406 div.className = 'BRpagediv1up';
407 div.id = 'pagediv'+index;
408 div.style.position = "absolute";
409 $(div).css('top', leafTop + 'px');
410 var left = (viewWidth-width)>>1;
411 if (left<0) left = 0;
412 $(div).css('left', left+'px');
413 $(div).css('width', width+'px');
414 $(div).css('height', height+'px');
415 //$(div).text('loading...');
417 $('#BRpageview').append(div);
419 var img = document.createElement("img");
420 img.src = this._getPageURI(index, this.reduce, 0);
421 $(img).css('width', width+'px');
422 $(img).css('height', height+'px');
426 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
429 leafTop += height +10;
433 for (i=0; i<this.displayedIndices.length; i++) {
434 if (BookReader.util.notInArray(this.displayedIndices[i], indicesToDisplay)) {
435 var index = this.displayedIndices[i];
436 //console.log('Removing leaf ' + index);
437 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
438 $('#pagediv'+index).remove();
440 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
444 this.displayedIndices = indicesToDisplay.slice();
445 this.updateSearchHilites();
447 if (null != this.getPageNum(firstIndexToDraw)) {
448 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
450 $("#BRpagenum").val('');
453 this.updateToolbarZoom(this.reduce);
457 // drawLeafsThumbnail()
458 //______________________________________________________________________________
459 // If seekIndex is defined, the view will be drawn with that page visible (without any
460 // animated scrolling)
461 BookReader.prototype.drawLeafsThumbnail = function( seekIndex ) {
462 //alert('drawing leafs!');
465 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
467 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
481 // Will be set to top of requested seek index, if set
484 // Calculate the position of every thumbnail. $$$ cache instead of calculating on every draw
485 for (i=0; i<this.numLeafs; i++) {
486 leafWidth = this.thumbWidth;
487 if (rightPos + (leafWidth + this.padding) > viewWidth){
493 if (leafMap[currentRow]===undefined) { leafMap[currentRow] = {}; }
494 if (leafMap[currentRow].leafs===undefined) {
495 leafMap[currentRow].leafs = [];
496 leafMap[currentRow].height = 0;
497 leafMap[currentRow].top = 0;
499 leafMap[currentRow].leafs[leafIndex] = {};
500 leafMap[currentRow].leafs[leafIndex].num = i;
501 leafMap[currentRow].leafs[leafIndex].left = rightPos;
503 leafHeight = parseInt((this.getPageHeight(leafMap[currentRow].leafs[leafIndex].num)*this.thumbWidth)/this.getPageWidth(leafMap[currentRow].leafs[leafIndex].num), 10);
504 if (leafHeight > leafMap[currentRow].height) {
505 leafMap[currentRow].height = leafHeight;
507 if (leafIndex===0) { bottomPos += this.padding + leafMap[currentRow].height; }
508 rightPos += leafWidth + this.padding;
509 if (rightPos > maxRight) { maxRight = rightPos; }
512 if (i == seekIndex) {
513 seekTop = bottomPos - this.padding - leafMap[currentRow].height;
517 // reset the bottom position based on thumbnails
518 $('#BRpageview').height(bottomPos);
520 var pageViewBuffer = Math.floor(($('#BRcontainer').attr('scrollWidth') - maxRight) / 2) - 14;
522 // If seekTop is defined, seeking was requested and target found
523 if (typeof(seekTop) != 'undefined') {
524 $('#BRcontainer').scrollTop( seekTop );
527 var scrollTop = $('#BRcontainer').attr('scrollTop');
528 var scrollBottom = scrollTop + $('#BRcontainer').height();
532 var rowsToDisplay = [];
534 // Visible leafs with least/greatest index
535 var leastVisible = this.numLeafs - 1;
538 // Determine the thumbnails in view
539 for (i=0; i<leafMap.length; i++) {
540 leafBottom += this.padding + leafMap[i].height;
541 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
542 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
543 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
544 if (topInView | bottomInView | middleInView) {
545 //console.log('row to display: ' + j);
546 rowsToDisplay.push(i);
547 if (leafMap[i].leafs[0].num < leastVisible) {
548 leastVisible = leafMap[i].leafs[0].num;
550 if (leafMap[i].leafs[leafMap[i].leafs.length - 1].num > mostVisible) {
551 mostVisible = leafMap[i].leafs[leafMap[i].leafs.length - 1].num;
554 if (leafTop > leafMap[i].top) { leafMap[i].top = leafTop; }
555 leafTop = leafBottom;
558 // create a buffer of preloaded rows before and after the visible rows
559 var firstRow = rowsToDisplay[0];
560 var lastRow = rowsToDisplay[rowsToDisplay.length-1];
561 for (i=1; i<this.thumbRowBuffer+1; i++) {
562 if (lastRow+i < leafMap.length) { rowsToDisplay.push(lastRow+i); }
564 for (i=1; i<this.thumbRowBuffer+1; i++) {
565 if (firstRow-i >= 0) { rowsToDisplay.push(firstRow-i); }
568 // Create the thumbnail divs and images (lazy loaded)
577 for (i=0; i<rowsToDisplay.length; i++) {
578 if (BookReader.util.notInArray(rowsToDisplay[i], this.displayedRows)) {
579 row = rowsToDisplay[i];
581 for (j=0; j<leafMap[row].leafs.length; j++) {
583 leaf = leafMap[row].leafs[j].num;
585 leafWidth = this.thumbWidth;
586 leafHeight = parseInt((this.getPageHeight(leaf)*this.thumbWidth)/this.getPageWidth(leaf), 10);
587 leafTop = leafMap[row].top;
588 left = leafMap[row].leafs[index].left + pageViewBuffer;
589 if ('rl' == this.pageProgression){
590 left = viewWidth - leafWidth - left;
593 div = document.createElement("div");
594 div.id = 'pagediv'+leaf;
595 div.style.position = "absolute";
596 div.className = "BRpagedivthumb";
598 left += this.padding;
599 $(div).css('top', leafTop + 'px');
600 $(div).css('left', left+'px');
601 $(div).css('width', leafWidth+'px');
602 $(div).css('height', leafHeight+'px');
603 //$(div).text('loading...');
605 // link to page in single page mode
606 link = document.createElement("a");
607 $(link).data('leaf', leaf);
608 $(link).bind('tap', function(event) {
609 self.firstIndex = $(this).data('leaf');
610 self.switchMode(self.constMode1up);
611 event.preventDefault();
614 // $$$ we don't actually go to this URL (click is handled in handler above)
615 link.href = '#page/' + (this.getPageNum(leaf)) +'/mode/1up' ;
618 $('#BRpageview').append(div);
620 img = document.createElement("img");
621 var thumbReduce = Math.floor(this.getPageWidth(leaf) / this.thumbWidth);
623 $(img).attr('src', this.imagesBaseURL + 'transparent.png')
624 .css({'width': leafWidth+'px', 'height': leafHeight+'px' })
625 .addClass('BRlazyload')
626 // Store the URL of the image that will replace this one
627 .data('srcURL', this._getPageURI(leaf, thumbReduce));
629 //console.log('displaying thumbnail: ' + leaf);
634 // Remove thumbnails that are not to be displayed
636 for (i=0; i<this.displayedRows.length; i++) {
637 if (BookReader.util.notInArray(this.displayedRows[i], rowsToDisplay)) {
638 row = this.displayedRows[i];
640 // $$$ Safari doesn't like the comprehension
641 //var rowLeafs = [leaf.num for each (leaf in leafMap[row].leafs)];
642 //console.log('Removing row ' + row + ' ' + rowLeafs);
644 for (k=0; k<leafMap[row].leafs.length; k++) {
645 index = leafMap[row].leafs[k].num;
646 //console.log('Removing leaf ' + index);
647 $('#pagediv'+index).remove();
651 var mRow = this.displayedRows[i];
652 var mLeafs = '[' + [leaf.num for each (leaf in leafMap[mRow].leafs)] + ']';
653 console.log('NOT Removing row ' + mRow + ' ' + mLeafs);
658 // Update which page is considered current to make sure a visible page is the current one
659 var currentIndex = this.currentIndex();
660 // console.log('current ' + currentIndex);
661 // console.log('least visible ' + leastVisible + ' most visible ' + mostVisible);
662 if (currentIndex < leastVisible) {
663 this.setCurrentIndex(leastVisible);
664 } else if (currentIndex > mostVisible) {
665 this.setCurrentIndex(mostVisible);
668 this.displayedRows = rowsToDisplay.slice();
670 // Update hash, but only if we're currently displaying a leaf
671 // Hack that fixes #365790
672 if (this.displayedRows.length > 0) {
673 this.updateLocationHash();
676 // remove previous highlights
677 $('.BRpagedivthumb_highlight').removeClass('BRpagedivthumb_highlight');
679 // highlight current page
680 $('#pagediv'+this.currentIndex()).addClass('BRpagedivthumb_highlight');
682 this.lazyLoadThumbnails();
684 // Update page number box. $$$ refactor to function
685 if (null !== this.getPageNum(this.currentIndex())) {
686 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
688 $("#BRpagenum").val('');
691 this.updateToolbarZoom(this.reduce);
694 BookReader.prototype.lazyLoadThumbnails = function() {
696 // console.log('lazy load');
698 // We check the complete property since load may not be fired if loading from the cache
699 $('.BRlazyloading').filter('[complete=true]').removeClass('BRlazyloading');
701 var loading = $('.BRlazyloading').length;
702 var toLoad = this.thumbMaxLoading - loading;
704 // console.log(' ' + loading + ' thumbnails loading');
705 // console.log(' this.thumbMaxLoading ' + this.thumbMaxLoading);
710 // $$$ TODO load those near top (but not beyond) page view first
711 $('#BRpageview img.BRlazyload').filter(':lt(' + toLoad + ')').each( function() {
712 self.lazyLoadImage(this);
717 BookReader.prototype.lazyLoadImage = function (dummyImage) {
718 //console.log(' lazy load started for ' + $(dummyImage).data('srcURL').match('([0-9]{4}).jp2')[1] );
720 var img = new Image();
724 .addClass('BRlazyloading')
725 .one('load', function() {
726 //if (console) { console.log(' onload ' + $(this).attr('src').match('([0-9]{4}).jp2')[1]); };
728 $(this).removeClass('BRlazyloading');
730 // $$$ Calling lazyLoadThumbnails here was causing stack overflow on IE so
731 // we call the function after a slight delay. Also the img.complete property
732 // is not yet set in IE8 inside this onload handler
733 setTimeout(function() { self.lazyLoadThumbnails(); }, 100);
735 .one('error', function() {
736 // Remove class so we no longer count as loading
737 $(this).removeClass('BRlazyloading');
739 .attr( { width: $(dummyImage).width(),
740 height: $(dummyImage).height(),
741 src: $(dummyImage).data('srcURL')
744 // replace with the new img
745 $(dummyImage).before(img).remove();
747 img = null; // tidy up closure
751 // drawLeafsTwoPage()
752 //______________________________________________________________________________
753 BookReader.prototype.drawLeafsTwoPage = function() {
754 var scrollTop = $('#BRtwopageview').attr('scrollTop');
755 var scrollBottom = scrollTop + $('#BRtwopageview').height();
757 // $$$ we should use calculated values in this.twoPage (recalc if necessary)
759 var indexL = this.twoPage.currentIndexL;
761 var heightL = this._getPageHeight(indexL);
762 var widthL = this._getPageWidth(indexL);
764 var leafEdgeWidthL = this.leafEdgeWidth(indexL);
765 var leafEdgeWidthR = this.twoPage.edgeWidth - leafEdgeWidthL;
766 //var bookCoverDivWidth = this.twoPage.width*2 + 20 + this.twoPage.edgeWidth; // $$$ hardcoded cover width
767 var bookCoverDivWidth = this.twoPage.bookCoverDivWidth;
768 //console.log(leafEdgeWidthL);
770 var middle = this.twoPage.middle; // $$$ getter instead?
771 var top = this.twoPageTop();
772 var bookCoverDivLeft = this.twoPage.bookCoverDivLeft;
774 this.twoPage.scaledWL = this.getPageWidth2UP(indexL);
775 this.twoPage.gutter = this.twoPageGutter();
777 this.prefetchImg(indexL);
778 $(this.prefetchedImgs[indexL]).css({
779 position: 'absolute',
780 left: this.twoPage.gutter-this.twoPage.scaledWL+'px',
783 height: this.twoPage.height +'px', // $$$ height forced the same for both pages
784 width: this.twoPage.scaledWL + 'px',
785 borderRight: '1px solid black',
787 }).appendTo('#BRtwopageview');
789 var indexR = this.twoPage.currentIndexR;
790 var heightR = this._getPageHeight(indexR);
791 var widthR = this._getPageWidth(indexR);
793 // $$$ should use getwidth2up?
794 //var scaledWR = this.twoPage.height*widthR/heightR;
795 this.twoPage.scaledWR = this.getPageWidth2UP(indexR);
796 this.prefetchImg(indexR);
797 $(this.prefetchedImgs[indexR]).css({
798 position: 'absolute',
799 left: this.twoPage.gutter+'px',
802 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
803 width: this.twoPage.scaledWR + 'px',
804 borderLeft: '1px solid black',
806 }).appendTo('#BRtwopageview');
809 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
810 this.setMouseHandlers2UP();
811 this.twoPageSetCursor();
813 this.updatePageNumBox2UP();
814 this.updateToolbarZoom(this.reduce);
816 // this.twoPagePlaceFlipAreas(); // No longer used
820 // updatePageNumBox2UP
821 //______________________________________________________________________________
822 BookReader.prototype.updatePageNumBox2UP = function() {
823 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
824 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
826 $("#BRpagenum").val('');
828 this.updateLocationHash();
832 //______________________________________________________________________________
833 BookReader.prototype.loadLeafs = function() {
837 if (null == this.timer) {
838 this.timer=setTimeout(function(){self.drawLeafs()},250);
840 clearTimeout(this.timer);
841 this.timer=setTimeout(function(){self.drawLeafs()},250);
847 // Pass 1 to zoom in, anything else to zoom out
848 //______________________________________________________________________________
849 BookReader.prototype.zoom = function(direction) {
851 case this.constMode1up:
852 if (direction == 1) {
854 return this.zoom1up('in');
856 return this.zoom1up('out');
859 case this.constMode2up:
860 if (direction == 1) {
862 return this.zoom2up('in');
864 return this.zoom2up('out');
867 case this.constModeThumb:
868 // XXX update zoomThumb for named directions
869 return this.zoomThumb(direction);
875 //______________________________________________________________________________
876 BookReader.prototype.zoom1up = function(direction) {
878 if (2 == this.mode) { //can only zoom in 1-page mode
883 var reduceFactor = this.nextReduce(this.reduce, direction, this.onePage.reductionFactors);
885 if (this.reduce == reduceFactor.reduce) {
886 // Already at this level
890 this.reduce = reduceFactor.reduce; // $$$ incorporate into function
891 this.onePage.autofit = reduceFactor.autofit;
893 this.pageScale = this.reduce; // preserve current reduce
894 this.resizePageView();
896 $('#BRpageview').empty()
897 this.displayedIndices = [];
900 this.updateToolbarZoom(this.reduce);
902 // Recalculate search hilites
903 this.removeSearchHilites();
904 this.updateSearchHilites();
909 //______________________________________________________________________________
910 BookReader.prototype.resizePageView = function() {
912 // $$$ This code assumes 1up mode
913 // e.g. does not preserve position in thumbnail mode
914 // See http://bugs.launchpad.net/bookreader/+bug/552972
917 case this.constMode1up:
918 case this.constMode2up:
919 this.resizePageView1up();
921 case this.constModeThumb:
922 this.prepareThumbnailView( this.currentIndex() );
925 alert('Resize not implemented for this mode');
929 BookReader.prototype.resizePageView1up = function() {
932 //var viewWidth = $('#BRcontainer').width(); //includes scrollBar
933 var viewWidth = $('#BRcontainer').attr('clientWidth');
935 var oldScrollTop = $('#BRcontainer').attr('scrollTop');
936 var oldScrollLeft = $('#BRcontainer').attr('scrollLeft');
937 var oldPageViewHeight = $('#BRpageview').height();
938 var oldPageViewWidth = $('#BRpageview').width();
940 var oldCenterY = this.centerY1up();
941 var oldCenterX = this.centerX1up();
943 if (0 != oldPageViewHeight) {
944 var scrollRatio = oldCenterY / oldPageViewHeight;
949 // Recalculate 1up reduction factors
950 this.onePageCalculateReductionFactors( $('#BRcontainer').attr('clientWidth'),
951 $('#BRcontainer').attr('clientHeight') );
952 // Update current reduce (if in autofit)
953 if (this.onePage.autofit) {
954 var reductionFactor = this.nextReduce(this.reduce, this.onePage.autofit, this.onePage.reductionFactors);
955 this.reduce = reductionFactor.reduce;
958 for (i=0; i<this.numLeafs; i++) {
959 viewHeight += parseInt(this._getPageHeight(i)/this.reduce) + this.padding;
960 var width = parseInt(this._getPageWidth(i)/this.reduce);
961 if (width>viewWidth) viewWidth=width;
963 $('#BRpageview').height(viewHeight);
964 $('#BRpageview').width(viewWidth);
966 var newCenterY = scrollRatio*viewHeight;
967 var newTop = Math.max(0, Math.floor( newCenterY - $('#BRcontainer').height()/2 ));
968 $('#BRcontainer').attr('scrollTop', newTop);
970 // We use clientWidth here to avoid miscalculating due to scroll bar
971 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
972 var newLeft = newCenterX - $('#BRcontainer').attr('clientWidth') / 2;
973 newLeft = Math.max(newLeft, 0);
974 $('#BRcontainer').attr('scrollLeft', newLeft);
975 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
977 //this.centerPageView();
980 this.removeSearchHilites();
981 this.updateSearchHilites();
986 //______________________________________________________________________________
987 // Returns the current offset of the viewport center in scaled document coordinates.
988 BookReader.prototype.centerX1up = function() {
990 if ($('#BRpageview').width() < $('#BRcontainer').attr('clientWidth')) { // fully shown
991 centerX = $('#BRpageview').width();
993 centerX = $('#BRcontainer').attr('scrollLeft') + $('#BRcontainer').attr('clientWidth') / 2;
995 centerX = Math.floor(centerX);
1000 //______________________________________________________________________________
1001 // Returns the current offset of the viewport center in scaled document coordinates.
1002 BookReader.prototype.centerY1up = function() {
1003 var centerY = $('#BRcontainer').attr('scrollTop') + $('#BRcontainer').height() / 2;
1004 return Math.floor(centerY);
1008 //______________________________________________________________________________
1009 BookReader.prototype.centerPageView = function() {
1011 var scrollWidth = $('#BRcontainer').attr('scrollWidth');
1012 var clientWidth = $('#BRcontainer').attr('clientWidth');
1013 //console.log('sW='+scrollWidth+' cW='+clientWidth);
1014 if (scrollWidth > clientWidth) {
1015 $('#BRcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
1020 // zoom2up(direction)
1021 //______________________________________________________________________________
1022 BookReader.prototype.zoom2up = function(direction) {
1024 // Hard stop autoplay
1025 this.stopFlipAnimations();
1027 // Recalculate autofit factors
1028 this.twoPageCalculateReductionFactors();
1030 // Get new zoom state
1031 var reductionFactor = this.nextReduce(this.reduce, direction, this.twoPage.reductionFactors);
1032 if ((this.reduce == reductionFactor.reduce) && (this.twoPage.autofit == reductionFactor.autofit)) {
1036 this.twoPage.autofit = reductionFactor.autofit;
1037 this.reduce = reductionFactor.reduce;
1038 this.pageScale = this.reduce; // preserve current reduce
1040 // Preserve view center position
1041 var oldCenter = this.twoPageGetViewCenter();
1043 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
1044 // $$$ An improvement would be to use the low res image until the larger one is loaded.
1045 if (1 == direction) {
1046 for (var img in this.prefetchedImgs) {
1047 delete this.prefetchedImgs[img];
1051 // Prepare view with new center to minimize visual glitches
1052 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
1055 BookReader.prototype.zoomThumb = function(direction) {
1056 var oldColumns = this.thumbColumns;
1057 switch (direction) {
1059 this.thumbColumns += 1;
1062 this.thumbColumns -= 1;
1067 if (this.thumbColumns < 2) {
1068 this.thumbColumns = 2;
1069 } else if (this.thumbColumns > 8) {
1070 this.thumbColumns = 8;
1073 if (this.thumbColumns != oldColumns) {
1074 this.prepareThumbnailView();
1078 // Returns the width per thumbnail to display the requested number of columns
1079 // Note: #BRpageview must already exist since its width is used to calculate the
1081 BookReader.prototype.getThumbnailWidth = function(thumbnailColumns) {
1082 var padding = (thumbnailColumns + 1) * this.padding;
1083 var width = ($('#BRpageview').width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides
1084 return parseInt(width);
1087 // quantizeReduce(reduce)
1088 //______________________________________________________________________________
1089 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
1090 BookReader.prototype.quantizeReduce = function(reduce, reductionFactors) {
1091 var quantized = reductionFactors[0].reduce;
1092 var distance = Math.abs(reduce - quantized);
1093 for (var i = 1; i < reductionFactors.length; i++) {
1094 newDistance = Math.abs(reduce - reductionFactors[i].reduce);
1095 if (newDistance < distance) {
1096 distance = newDistance;
1097 quantized = reductionFactors[i].reduce;
1104 // reductionFactors should be array of sorted reduction factors
1105 // e.g. [ {reduce: 0.25, autofit: null}, {reduce: 0.3, autofit: 'width'}, {reduce: 1, autofit: null} ]
1106 BookReader.prototype.nextReduce = function( currentReduce, direction, reductionFactors ) {
1108 // XXX add 'closest', to replace quantize function
1110 if (direction == 'in') {
1111 var newReduceIndex = 0;
1113 for (var i = 1; i < reductionFactors.length; i++) {
1114 if (reductionFactors[i].reduce < currentReduce) {
1118 return reductionFactors[newReduceIndex];
1120 } else if (direction == 'out') { // zoom out
1121 var lastIndex = reductionFactors.length - 1;
1122 var newReduceIndex = lastIndex;
1124 for (var i = lastIndex; i >= 0; i--) {
1125 if (reductionFactors[i].reduce > currentReduce) {
1129 return reductionFactors[newReduceIndex];
1132 // Asked for specific autofit mode
1133 for (var i = 0; i < reductionFactors.length; i++) {
1134 if (reductionFactors[i].autofit == direction) {
1135 return reductionFactors[i];
1139 alert('Could not find reduction factor for direction ' + direction);
1140 return reductionFactors[0];
1144 BookReader.prototype._reduceSort = function(a, b) {
1145 return a.reduce - b.reduce;
1149 //______________________________________________________________________________
1150 // Attempts to jump to page. Returns true if page could be found, false otherwise.
1151 BookReader.prototype.jumpToPage = function(pageNum) {
1153 var pageIndex = this.getPageIndex(pageNum);
1155 if ('undefined' != typeof(pageIndex)) {
1158 this.jumpToIndex(pageIndex);
1159 $('#BRcontainer').attr('scrollTop', leafTop);
1168 //______________________________________________________________________________
1169 BookReader.prototype.jumpToIndex = function(index, pageX, pageY) {
1171 if (this.constMode2up == this.mode) {
1174 // By checking against min/max we do nothing if requested index
1176 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1177 this.flipBackToIndex(index);
1178 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1179 this.flipFwdToIndex(index);
1182 } else if (this.constModeThumb == this.mode) {
1183 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
1193 for (i=0; i<(index+1); i++) {
1194 leafWidth = this.thumbWidth;
1195 if (rightPos + (leafWidth + this.padding) > viewWidth){
1201 leafHeight = parseInt((this.getPageHeight(leafIndex)*this.thumbWidth)/this.getPageWidth(leafIndex), 10);
1202 if (leafHeight > rowHeight) { rowHeight = leafHeight; }
1203 if (leafIndex==0) { leafTop = bottomPos; }
1204 if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
1205 rightPos += leafWidth + this.padding;
1208 this.firstIndex=index;
1209 if ($('#BRcontainer').attr('scrollTop') == leafTop) {
1212 $('#BRcontainer').animate({scrollTop: leafTop },'fast');
1220 for (i=0; i<index; i++) {
1221 h = parseInt(this._getPageHeight(i)/this.reduce);
1222 leafTop += h + this.padding;
1226 //console.log('pageY ' + pageY);
1227 var offset = parseInt( (pageY) / this.reduce);
1228 offset -= $('#BRcontainer').attr('clientHeight') >> 1;
1229 //console.log( 'jumping to ' + leafTop + ' ' + offset);
1232 // Show page just a little below the top
1233 leafTop -= this.padding / 2;
1237 var offset = parseInt( (pageX) / this.reduce);
1238 offset -= $('#BRcontainer').attr('clientWidth') >> 1;
1241 // Preserve left position
1242 leafLeft = $('#BRcontainer').scrollLeft();
1245 //$('#BRcontainer').attr('scrollTop', leafTop);
1246 $('#BRcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
1252 //______________________________________________________________________________
1253 BookReader.prototype.switchMode = function(mode) {
1255 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
1257 if (mode == this.mode) {
1261 if (!this.canSwitchToMode(mode)) {
1266 this.removeSearchHilites();
1269 this.switchToolbarMode(mode);
1271 // reinstate scale if moving from thumbnail view
1272 if (this.pageScale != this.reduce) {
1273 this.reduce = this.pageScale;
1276 // $$$ TODO preserve center of view when switching between mode
1277 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
1279 // XXX maybe better to preserve zoom in each mode
1281 this.onePageCalculateReductionFactors( $('#BRcontainer').attr('clientWidth'), $('#BRcontainer').attr('clientHeight'));
1282 this.reduce = this.quantizeReduce(this.reduce, this.onePage.reductionFactors);
1283 this.prepareOnePageView();
1284 } else if (3 == mode) {
1285 this.reduce = this.quantizeReduce(this.reduce, this.reductionFactors);
1286 this.prepareThumbnailView();
1288 // $$$ why don't we save autofit?
1289 this.twoPage.autofit = null; // Take zoom level from other mode
1290 this.twoPageCalculateReductionFactors();
1291 this.reduce = this.quantizeReduce(this.reduce, this.twoPage.reductionFactors);
1292 this.prepareTwoPageView();
1293 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
1298 //prepareOnePageView()
1299 //______________________________________________________________________________
1300 BookReader.prototype.prepareOnePageView = function() {
1302 // var startLeaf = this.displayedIndices[0];
1303 var startLeaf = this.currentIndex();
1305 $('#BRcontainer').empty();
1306 $('#BRcontainer').css({
1307 overflowY: 'scroll',
1311 $("#BRcontainer").append("<div id='BRpageview'></div>");
1313 // Attaches to first child - child must be present
1314 $('#BRcontainer').dragscrollable();
1315 this.bindGestures($('#BRcontainer'));
1317 // $$$ keep select enabled for now since disabling it breaks keyboard
1318 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1319 // BookReader.util.disableSelect($('#BRpageview'));
1321 this.resizePageView();
1323 this.jumpToIndex(startLeaf);
1324 this.displayedIndices = [];
1326 this.drawLeafsOnePage();
1329 //prepareThumbnailView()
1330 //______________________________________________________________________________
1331 BookReader.prototype.prepareThumbnailView = function() {
1333 $('#BRcontainer').empty();
1334 $('#BRcontainer').css({
1335 overflowY: 'scroll',
1339 $("#BRcontainer").append("<div id='BRpageview'></div>");
1341 $('#BRcontainer').dragscrollable();
1342 this.bindGestures($('#BRcontainer'));
1344 // $$$ keep select enabled for now since disabling it breaks keyboard
1345 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1346 // BookReader.util.disableSelect($('#BRpageview'));
1348 this.thumbWidth = this.getThumbnailWidth(this.thumbColumns);
1349 this.reduce = this.getPageWidth(0)/this.thumbWidth;
1351 this.displayedRows = [];
1353 // Draw leafs with current index directly in view (no animating to the index)
1354 this.drawLeafsThumbnail( this.currentIndex() );
1358 // prepareTwoPageView()
1359 //______________________________________________________________________________
1360 // Some decisions about two page view:
1362 // Both pages will be displayed at the same height, even if they were different physical/scanned
1363 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
1364 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
1365 // aspect ratio to determine the height.
1367 // The two page view div is resized to keep the middle of the book in the middle of the div
1368 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the BRcontent
1369 // div requires adjusting the offset of BRtwpageview and/or scrolling in BRcontent.
1370 BookReader.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
1371 $('#BRcontainer').empty();
1372 $('#BRcontainer').css('overflow', 'auto');
1374 // We want to display two facing pages. We may be missing
1375 // one side of the spread because it is the first/last leaf,
1376 // foldouts, missing pages, etc
1378 //var targetLeaf = this.displayedIndices[0];
1379 var targetLeaf = this.firstIndex;
1381 if (targetLeaf < this.firstDisplayableIndex()) {
1382 targetLeaf = this.firstDisplayableIndex();
1385 if (targetLeaf > this.lastDisplayableIndex()) {
1386 targetLeaf = this.lastDisplayableIndex();
1389 //this.twoPage.currentIndexL = null;
1390 //this.twoPage.currentIndexR = null;
1391 //this.pruneUnusedImgs();
1393 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1394 this.twoPage.currentIndexL = currentSpreadIndices[0];
1395 this.twoPage.currentIndexR = currentSpreadIndices[1];
1396 this.firstIndex = this.twoPage.currentIndexL;
1398 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1400 this.pruneUnusedImgs();
1401 this.prefetch(); // Preload images or reload if scaling has changed
1403 //console.dir(this.twoPage);
1405 // Add the two page view
1406 // $$$ Can we get everything set up and then append?
1407 $('#BRcontainer').append('<div id="BRtwopageview"></div>');
1409 // Attaches to first child, so must come after we add the page view
1410 $('#BRcontainer').dragscrollable();
1411 this.bindGestures($('#BRcontainer'));
1413 // $$$ calculate first then set
1414 $('#BRtwopageview').css( {
1415 height: this.twoPage.totalHeight + 'px',
1416 width: this.twoPage.totalWidth + 'px',
1417 position: 'absolute'
1420 // If there will not be scrollbars (e.g. when zooming out) we center the book
1421 // since otherwise the book will be stuck off-center
1422 if (this.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
1423 centerPercentageX = 0.5;
1425 if (this.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
1426 centerPercentageY = 0.5;
1429 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1431 this.twoPage.coverDiv = document.createElement('div');
1432 $(this.twoPage.coverDiv).attr('id', 'BRbookcover').css({
1433 width: this.twoPage.bookCoverDivWidth + 'px',
1434 height: this.twoPage.bookCoverDivHeight+'px',
1435 visibility: 'visible',
1436 position: 'absolute',
1437 left: this.twoPage.bookCoverDivLeft + 'px',
1438 top: this.twoPage.bookCoverDivTop+'px'
1439 }).appendTo('#BRtwopageview');
1441 this.leafEdgeR = document.createElement('div');
1442 this.leafEdgeR.className = 'BRleafEdgeR';
1443 $(this.leafEdgeR).css({
1444 width: this.twoPage.leafEdgeWidthR + 'px',
1445 height: this.twoPage.height-1 + 'px',
1446 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1447 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px'
1448 }).appendTo('#BRtwopageview');
1450 this.leafEdgeL = document.createElement('div');
1451 this.leafEdgeL.className = 'BRleafEdgeL';
1452 $(this.leafEdgeL).css({
1453 width: this.twoPage.leafEdgeWidthL + 'px',
1454 height: this.twoPage.height-1 + 'px',
1455 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1456 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px'
1457 }).appendTo('#BRtwopageview');
1459 div = document.createElement('div');
1460 $(div).attr('id', 'BRbookspine').css({
1461 width: this.twoPage.bookSpineDivWidth+'px',
1462 height: this.twoPage.bookSpineDivHeight+'px',
1463 left: this.twoPage.bookSpineDivLeft+'px',
1464 top: this.twoPage.bookSpineDivTop+'px'
1465 }).appendTo('#BRtwopageview');
1467 var self = this; // for closure
1469 /* Flip areas no longer used
1470 this.twoPage.leftFlipArea = document.createElement('div');
1471 this.twoPage.leftFlipArea.className = 'BRfliparea';
1472 $(this.twoPage.leftFlipArea).attr('id', 'BRleftflip').css({
1474 width: this.twoPageFlipAreaWidth() + 'px',
1475 height: this.twoPageFlipAreaHeight() + 'px',
1476 position: 'absolute',
1477 left: this.twoPageLeftFlipAreaLeft() + 'px',
1478 top: this.twoPageFlipAreaTop() + 'px',
1481 }).bind('click', function(e) {
1483 }).bind('mousedown', function(e) {
1485 }).appendTo('#BRtwopageview');
1487 this.twoPage.rightFlipArea = document.createElement('div');
1488 this.twoPage.rightFlipArea.className = 'BRfliparea';
1489 $(this.twoPage.rightFlipArea).attr('id', 'BRrightflip').css({
1491 width: this.twoPageFlipAreaWidth() + 'px',
1492 height: this.twoPageFlipAreaHeight() + 'px',
1493 position: 'absolute',
1494 left: this.twoPageRightFlipAreaLeft() + 'px',
1495 top: this.twoPageFlipAreaTop() + 'px',
1498 }).bind('click', function(e) {
1500 }).bind('mousedown', function(e) {
1502 }).appendTo('#BRtwopageview');
1505 this.prepareTwoPagePopUp();
1507 this.displayedIndices = [];
1509 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1510 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1512 this.drawLeafsTwoPage();
1513 this.updateToolbarZoom(this.reduce);
1517 this.removeSearchHilites();
1518 this.updateSearchHilites();
1522 // prepareTwoPagePopUp()
1524 // This function prepares the "View Page n" popup that shows while the mouse is
1525 // over the left/right "stack of sheets" edges. It also binds the mouse
1526 // events for these divs.
1527 //______________________________________________________________________________
1528 BookReader.prototype.prepareTwoPagePopUp = function() {
1530 this.twoPagePopUp = document.createElement('div');
1531 this.twoPagePopUp.className = 'BRtwoPagePopUp';
1532 $(this.twoPagePopUp).css({
1534 }).appendTo('#BRcontainer');
1535 $(this.twoPagePopUp).hide();
1537 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1538 $(e.data.twoPagePopUp).show();
1541 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1542 $(e.data.twoPagePopUp).hide();
1545 $(this.leafEdgeL).bind('click', this, function(e) {
1547 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1548 e.data.jumpToIndex(jumpIndex);
1551 $(this.leafEdgeR).bind('click', this, function(e) {
1553 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1554 e.data.jumpToIndex(jumpIndex);
1557 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1559 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1560 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1562 // $$$ TODO: Make sure popup is positioned so that it is in view
1563 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1564 $(e.data.twoPagePopUp).css({
1565 left: e.pageX- $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() + 20 + 'px',
1566 top: e.pageY - $('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1570 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1572 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1573 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1575 // $$$ TODO: Make sure popup is positioned so that it is in view
1576 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1577 $(e.data.twoPagePopUp).css({
1578 left: e.pageX - $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1579 top: e.pageY-$('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1584 // calculateSpreadSize()
1585 //______________________________________________________________________________
1586 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1587 // this.twoPage.currentIndexR
1588 // This function sets this.twoPage.height, twoPage.width
1590 BookReader.prototype.calculateSpreadSize = function() {
1592 var firstIndex = this.twoPage.currentIndexL;
1593 var secondIndex = this.twoPage.currentIndexR;
1594 //console.log('first page is ' + firstIndex);
1596 // Calculate page sizes and total leaf width
1598 if ( this.twoPage.autofit) {
1599 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1601 // set based on reduction factor
1602 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1605 // Both pages together
1606 this.twoPage.height = spreadSize.height;
1607 this.twoPage.width = spreadSize.width;
1610 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1611 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1614 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1615 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1616 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1620 // The width of the book cover div. The combined width of both pages, twice the width
1621 // of the book cover internal padding (2*10) and the page edges
1622 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1623 // The height of the book cover div
1624 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1627 // We calculate the total width and height for the div so that we can make the book
1629 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1630 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1631 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1632 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1633 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1634 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1636 // We want to minimize the unused space in two-up mode (maximize the amount of page
1637 // shown). We give width to the leaf edges and these widths change (though the sum
1638 // of the two remains constant) as we flip through the book. With the book
1639 // cover centered and fixed in the BRcontainer div the page images will meet
1640 // at the "gutter" which is generally offset from the center.
1641 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1642 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1644 // The left edge of the book cover moves depending on the width of the pages
1645 // $$$ change to getter
1646 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1647 // The top edge of the book cover stays a fixed distance from the top
1648 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1651 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1652 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1653 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1656 this.reduce = spreadSize.reduce; // $$$ really set this here?
1659 BookReader.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1662 // We check which page is closest to a "normal" page and use that to set the height
1663 // for both pages. This means that foldouts and other odd size pages will be displayed
1664 // smaller than the nominal zoom amount.
1665 var canon5Dratio = 1.5;
1668 height: this._getPageHeight(firstIndex),
1669 width: this._getPageWidth(firstIndex)
1673 height: this._getPageHeight(secondIndex),
1674 width: this._getPageWidth(secondIndex)
1677 var firstIndexRatio = first.height / first.width;
1678 var secondIndexRatio = second.height / second.width;
1679 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1682 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1683 ratio = firstIndexRatio;
1684 //console.log('using firstIndexRatio ' + ratio);
1686 ratio = secondIndexRatio;
1687 //console.log('using secondIndexRatio ' + ratio);
1690 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1691 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1);
1692 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1694 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1695 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1697 ideal.width = ($('#BRcontainer').width() - widthOutsidePages) >> 1;
1698 ideal.width -= 10; // $$$ fudge factor
1699 ideal.height = $('#BRcontainer').height() - heightOutsidePages;
1700 ideal.height -= 20; // fudge factor
1701 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1703 if (ideal.height/ratio <= ideal.width) {
1705 ideal.width = parseInt(ideal.height/ratio);
1708 ideal.height = parseInt(ideal.width*ratio);
1711 // $$$ check this logic with large spreads
1712 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1717 // getSpreadSizeFromReduce()
1718 //______________________________________________________________________________
1719 // Returns the spread size calculated from the reduction factor for the given pages
1720 BookReader.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1721 var spreadSize = {};
1722 // $$$ Scale this based on reduce?
1723 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1724 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1725 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1727 // $$$ Possibly incorrect -- we should make height "dominant"
1728 var nativeWidth = this._getPageWidth(firstIndex) + this._getPageWidth(secondIndex);
1729 var nativeHeight = this._getPageHeight(firstIndex) + this._getPageHeight(secondIndex);
1730 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1731 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1732 spreadSize.reduce = reduce;
1737 // twoPageGetAutofitReduce()
1738 //______________________________________________________________________________
1739 // Returns the current ideal reduction factor
1740 BookReader.prototype.twoPageGetAutofitReduce = function() {
1741 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1742 return spreadSize.reduce;
1745 BookReader.prototype.onePageGetAutofitWidth = function() {
1746 var widthPadding = 20;
1747 return (this.getMedianPageSize().width + 0.0) / ($('#BRcontainer').attr('clientWidth') - widthPadding * 2);
1750 BookReader.prototype.onePageGetAutofitHeight = function() {
1751 return (this.getMedianPageSize().height + 0.0) / ($('#BRcontainer').attr('clientHeight') - this.padding * 2); // make sure a little of adjacent pages show
1754 BookReader.prototype.getMedianPageSize = function() {
1755 if (this._medianPageSize) {
1756 return this._medianPageSize;
1759 // A little expensive but we just do it once
1762 for (var i = 0; i < this.numLeafs; i++) {
1763 widths.push(this.getPageWidth(i));
1764 heights.push(this.getPageHeight(i));
1770 this._medianPageSize = { width: widths[parseInt(widths.length / 2)], height: heights[parseInt(heights.length / 2)] };
1771 return this._medianPageSize;
1774 // Update the reduction factors for 1up mode given the available width and height. Recalculates
1775 // the autofit reduction factors.
1776 BookReader.prototype.onePageCalculateReductionFactors = function( width, height ) {
1777 this.onePage.reductionFactors = this.reductionFactors.concat(
1779 { reduce: this.onePageGetAutofitWidth(), autofit: 'width' },
1780 { reduce: this.onePageGetAutofitHeight(), autofit: 'height'}
1782 this.onePage.reductionFactors.sort(this._reduceSort);
1785 BookReader.prototype.twoPageCalculateReductionFactors = function() {
1786 this.twoPage.reductionFactors = this.reductionFactors.concat(
1788 { reduce: this.getIdealSpreadSize( this.twoPage.currentIndexL, this.twoPage.currentIndexR ).reduce,
1791 this.twoPage.reductionFactors.sort(this._reduceSort);
1794 // twoPageSetCursor()
1795 //______________________________________________________________________________
1796 // Set the cursor for two page view
1797 BookReader.prototype.twoPageSetCursor = function() {
1798 // console.log('setting cursor');
1799 if ( ($('#BRtwopageview').width() > $('#BRcontainer').attr('clientWidth')) ||
1800 ($('#BRtwopageview').height() > $('#BRcontainer').attr('clientHeight')) ) {
1801 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1802 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1804 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1805 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1810 //______________________________________________________________________________
1811 // Returns the currently active index.
1812 BookReader.prototype.currentIndex = function() {
1813 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1814 if (this.mode == this.constMode1up || this.mode == this.constModeThumb) {
1815 return this.firstIndex; // $$$ TODO page in center of view would be better
1816 } else if (this.mode == this.constMode2up) {
1817 // Only allow indices that are actually present in book
1818 return BookReader.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
1820 throw 'currentIndex called for unimplemented mode ' + this.mode;
1824 // setCurrentIndex(index)
1825 //______________________________________________________________________________
1826 // Sets the idea of current index without triggering other actions such as animation.
1827 // Compare to jumpToIndex which animates to that index
1828 BookReader.prototype.setCurrentIndex = function(index) {
1829 this.firstIndex = index;
1834 //______________________________________________________________________________
1835 // Flip the right page over onto the left
1836 BookReader.prototype.right = function() {
1837 if ('rl' != this.pageProgression) {
1847 //______________________________________________________________________________
1848 // Flip to the rightmost page
1849 BookReader.prototype.rightmost = function() {
1850 if ('rl' != this.pageProgression) {
1858 //______________________________________________________________________________
1859 // Flip the left page over onto the right.
1860 BookReader.prototype.left = function() {
1861 if ('rl' != this.pageProgression) {
1871 //______________________________________________________________________________
1872 // Flip to the leftmost page
1873 BookReader.prototype.leftmost = function() {
1874 if ('rl' != this.pageProgression) {
1882 //______________________________________________________________________________
1883 BookReader.prototype.next = function() {
1884 if (2 == this.mode) {
1886 this.flipFwdToIndex(null);
1888 if (this.firstIndex < this.lastDisplayableIndex()) {
1889 this.jumpToIndex(this.firstIndex+1);
1895 //______________________________________________________________________________
1896 BookReader.prototype.prev = function() {
1897 if (2 == this.mode) {
1899 this.flipBackToIndex(null);
1901 if (this.firstIndex >= 1) {
1902 this.jumpToIndex(this.firstIndex-1);
1907 BookReader.prototype.first = function() {
1908 this.jumpToIndex(this.firstDisplayableIndex());
1911 BookReader.prototype.last = function() {
1912 this.jumpToIndex(this.lastDisplayableIndex());
1916 //______________________________________________________________________________
1917 // Scrolls down one screen view
1918 BookReader.prototype.scrollDown = function() {
1919 if ($.inArray(this.mode, [this.constMode1up, this.constModeThumb]) >= 0) {
1920 if ( this.mode == this.constMode1up && (this.reduce >= this.onePageGetAutofitHeight()) ) {
1921 // Whole pages are visible, scroll whole page only
1925 $('#BRcontainer').animate(
1926 { scrollTop: '+=' + this._scrollAmount() + 'px'},
1927 400, 'easeInOutExpo'
1936 //______________________________________________________________________________
1937 // Scrolls up one screen view
1938 BookReader.prototype.scrollUp = function() {
1939 if ($.inArray(this.mode, [this.constMode1up, this.constModeThumb]) >= 0) {
1940 if ( this.mode == this.constMode1up && (this.reduce >= this.onePageGetAutofitHeight()) ) {
1941 // Whole pages are visible, scroll whole page only
1945 $('#BRcontainer').animate(
1946 { scrollTop: '-=' + this._scrollAmount() + 'px'},
1947 400, 'easeInOutExpo'
1956 //______________________________________________________________________________
1957 // The amount to scroll vertically in integer pixels
1958 BookReader.prototype._scrollAmount = function() {
1959 if (this.constMode1up == this.mode) {
1960 // Overlap by % of page size
1961 return parseInt($('#BRcontainer').attr('clientHeight') - this.getPageHeight(this.currentIndex()) / this.reduce * 0.03);
1964 return parseInt(0.9 * $('#BRcontainer').attr('clientHeight'));
1968 // flipBackToIndex()
1969 //______________________________________________________________________________
1970 // to flip back one spread, pass index=null
1971 BookReader.prototype.flipBackToIndex = function(index) {
1973 if (1 == this.mode) return;
1975 var leftIndex = this.twoPage.currentIndexL;
1977 if (this.animating) return;
1979 if (null != this.leafEdgeTmp) {
1980 alert('error: leafEdgeTmp should be null!');
1984 if (null == index) {
1985 index = leftIndex-2;
1987 //if (index<0) return;
1989 var previousIndices = this.getSpreadIndices(index);
1991 if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
1995 this.animating = true;
1997 if ('rl' != this.pageProgression) {
1998 // Assume LTR and we are going backward
1999 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
2000 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
2002 // RTL and going backward
2003 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
2004 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
2008 // flipLeftToRight()
2009 //______________________________________________________________________________
2010 // Flips the page on the left towards the page on the right
2011 BookReader.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
2013 var leftLeaf = this.twoPage.currentIndexL;
2015 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2016 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2017 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
2019 var currWidthL = this.getPageWidth2UP(leftLeaf);
2020 var newWidthL = this.getPageWidth2UP(newIndexL);
2021 var newWidthR = this.getPageWidth2UP(newIndexR);
2023 var top = this.twoPageTop();
2024 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
2026 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
2027 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
2029 //animation strategy:
2030 // 0. remove search highlight, if any.
2031 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
2032 // of the left leaf and where the user clicked in the leaf edge.
2033 // Note that if this function was triggered by left() and not a
2034 // mouse click, the width of leafEdgeTmp is very small (zero px).
2035 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
2036 // leftLeaf to width=0.
2037 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
2038 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
2039 // its new full width.
2040 // 4. After step 3 is finished, do the following:
2041 // - remove leafEdgeTmp from the dom.
2042 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
2043 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
2044 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
2045 // and width=newLeafEdgeWidthL.
2046 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
2047 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
2048 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
2049 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
2050 // - prefetch new adjacent leafs.
2051 // - set up click handlers for both new left and right leafs.
2052 // - redraw the search highlight.
2053 // - update the pagenum box and the url.
2056 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
2058 this.leafEdgeTmp = document.createElement('div');
2059 this.leafEdgeTmp.className = 'BRleafEdgeTmp';
2060 $(this.leafEdgeTmp).css({
2061 width: leafEdgeTmpW + 'px',
2062 height: this.twoPage.height-1 + 'px',
2063 left: leftEdgeTmpLeft + 'px',
2066 }).appendTo('#BRtwopageview');
2068 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
2069 $(this.leafEdgeL).css({
2070 width: newLeafEdgeWidthL+'px',
2071 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
2074 // Left gets the offset of the current left leaf from the document
2075 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
2076 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
2077 var right = $('#BRtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#BRtwopageview').offset().left-2+'px';
2079 // We change the left leaf to right positioning
2080 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
2081 $(this.prefetchedImgs[leftLeaf]).css({
2086 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
2087 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
2091 this.removeSearchHilites();
2093 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
2094 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
2096 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
2097 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
2099 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
2100 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
2101 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
2103 $(self.leafEdgeR).css({
2104 // Moves the right leaf edge
2105 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
2106 left: gutter+newWidthR+'px'
2109 $(self.leafEdgeL).css({
2110 // Moves and resizes the left leaf edge
2111 width: newLeafEdgeWidthL+'px',
2112 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2115 // Resizes the brown border div
2116 $(self.twoPage.coverDiv).css({
2117 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2118 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
2121 $(self.leafEdgeTmp).remove();
2122 self.leafEdgeTmp = null;
2124 // $$$ TODO refactor with opposite direction flip
2126 self.twoPage.currentIndexL = newIndexL;
2127 self.twoPage.currentIndexR = newIndexR;
2128 self.twoPage.scaledWL = newWidthL;
2129 self.twoPage.scaledWR = newWidthR;
2130 self.twoPage.gutter = gutter;
2132 self.firstIndex = self.twoPage.currentIndexL;
2133 self.displayedIndices = [newIndexL, newIndexR];
2134 self.pruneUnusedImgs();
2136 self.animating = false;
2138 self.updateSearchHilites2UP();
2139 self.updatePageNumBox2UP();
2141 // self.twoPagePlaceFlipAreas(); // No longer used
2142 self.setMouseHandlers2UP();
2143 self.twoPageSetCursor();
2145 if (self.animationFinishedCallback) {
2146 self.animationFinishedCallback();
2147 self.animationFinishedCallback = null;
2155 //______________________________________________________________________________
2156 // Whether we flip left or right is dependent on the page progression
2157 // to flip forward one spread, pass index=null
2158 BookReader.prototype.flipFwdToIndex = function(index) {
2160 if (this.animating) return;
2162 if (null != this.leafEdgeTmp) {
2163 alert('error: leafEdgeTmp should be null!');
2167 if (null == index) {
2168 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
2170 if (index > this.lastDisplayableIndex()) return;
2172 this.animating = true;
2174 var nextIndices = this.getSpreadIndices(index);
2176 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
2178 if ('rl' != this.pageProgression) {
2179 // We did not specify RTL
2180 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
2181 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
2184 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
2185 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
2189 // flipRightToLeft(nextL, nextR, gutter)
2190 // $$$ better not to have to pass gutter in
2191 //______________________________________________________________________________
2192 // Flip from left to right and show the nextL and nextR indices on those sides
2193 BookReader.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
2194 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2195 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
2196 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2197 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
2199 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
2201 var top = this.twoPageTop();
2202 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
2204 var middle = this.twoPage.middle;
2205 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
2207 this.leafEdgeTmp = document.createElement('div');
2208 this.leafEdgeTmp.className = 'BRleafEdgeTmp';
2209 $(this.leafEdgeTmp).css({
2210 width: leafEdgeTmpW + 'px',
2211 height: this.twoPage.height-1 + 'px',
2212 left: gutter+scaledW+'px',
2215 }).appendTo('#BRtwopageview');
2217 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
2218 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
2220 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
2221 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
2222 var newWidthL = this.getPageWidth2UP(newIndexL);
2223 var newWidthR = this.getPageWidth2UP(newIndexR);
2225 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
2227 var self = this; // closure-tastic!
2229 var speed = this.flipSpeed;
2231 this.removeSearchHilites();
2233 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
2234 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
2235 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
2236 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
2237 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
2239 $(self.leafEdgeL).css({
2240 width: newLeafEdgeWidthL+'px',
2241 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2244 // Resizes the book cover
2245 $(self.twoPage.coverDiv).css({
2246 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2247 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
2250 $(self.leafEdgeTmp).remove();
2251 self.leafEdgeTmp = null;
2253 self.twoPage.currentIndexL = newIndexL;
2254 self.twoPage.currentIndexR = newIndexR;
2255 self.twoPage.scaledWL = newWidthL;
2256 self.twoPage.scaledWR = newWidthR;
2257 self.twoPage.gutter = gutter;
2259 self.firstIndex = self.twoPage.currentIndexL;
2260 self.displayedIndices = [newIndexL, newIndexR];
2261 self.pruneUnusedImgs();
2263 self.animating = false;
2266 self.updateSearchHilites2UP();
2267 self.updatePageNumBox2UP();
2269 // self.twoPagePlaceFlipAreas(); // No longer used
2270 self.setMouseHandlers2UP();
2271 self.twoPageSetCursor();
2273 if (self.animationFinishedCallback) {
2274 self.animationFinishedCallback();
2275 self.animationFinishedCallback = null;
2281 // setMouseHandlers2UP
2282 //______________________________________________________________________________
2283 BookReader.prototype.setMouseHandlers2UP = function() {
2284 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
2292 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
2295 e.data.self.right();
2302 //______________________________________________________________________________
2303 BookReader.prototype.prefetchImg = function(index) {
2304 var pageURI = this._getPageURI(index);
2306 // Load image if not loaded or URI has changed (e.g. due to scaling)
2307 var loadImage = false;
2308 if (undefined == this.prefetchedImgs[index]) {
2309 //console.log('no image for ' + index);
2311 } else if (pageURI != this.prefetchedImgs[index].uri) {
2312 //console.log('uri changed for ' + index);
2317 //console.log('prefetching ' + index);
2318 var img = document.createElement("img");
2319 img.className = 'BRpageimage';
2320 if (index < 0 || index > (this.numLeafs - 1) ) {
2321 // Facing page at beginning or end, or beyond
2323 'background-color': 'transparent'
2327 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
2328 this.prefetchedImgs[index] = img;
2333 // prepareFlipLeftToRight()
2335 //______________________________________________________________________________
2337 // Prepare to flip the left page towards the right. This corresponds to moving
2338 // backward when the page progression is left to right.
2339 BookReader.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
2341 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
2343 this.prefetchImg(prevL);
2344 this.prefetchImg(prevR);
2346 var height = this._getPageHeight(prevL);
2347 var width = this._getPageWidth(prevL);
2348 var middle = this.twoPage.middle;
2349 var top = this.twoPageTop();
2350 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
2352 // The gutter is the dividing line between the left and right pages.
2353 // It is offset from the middle to create the illusion of thickness to the pages
2354 var gutter = middle + this.gutterOffsetForIndex(prevL);
2356 //console.log(' gutter for ' + prevL + ' is ' + gutter);
2357 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
2358 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
2361 position: 'absolute',
2362 left: gutter-scaledW+'px',
2363 right: '', // clear right property
2365 height: this.twoPage.height,
2366 width: scaledW+'px',
2367 borderRight: '1px solid black',
2371 $(this.prefetchedImgs[prevL]).css(leftCSS);
2373 $('#BRtwopageview').append(this.prefetchedImgs[prevL]);
2375 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
2378 position: 'absolute',
2382 height: this.twoPage.height,
2384 borderLeft: '1px solid black',
2388 $(this.prefetchedImgs[prevR]).css(rightCSS);
2390 $('#BRtwopageview').append(this.prefetchedImgs[prevR]);
2394 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
2395 // prepareFlipRightToLeft()
2396 //______________________________________________________________________________
2397 BookReader.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
2399 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
2402 this.prefetchImg(nextL);
2403 this.prefetchImg(nextR);
2405 var height = this._getPageHeight(nextR);
2406 var width = this._getPageWidth(nextR);
2407 var middle = this.twoPage.middle;
2408 var top = this.twoPageTop();
2409 var scaledW = this.twoPage.height*width/height;
2411 var gutter = middle + this.gutterOffsetForIndex(nextL);
2413 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
2414 $(this.prefetchedImgs[nextR]).css({
2415 position: 'absolute',
2418 height: this.twoPage.height,
2419 width: scaledW+'px',
2420 borderLeft: '1px solid black',
2424 $('#BRtwopageview').append(this.prefetchedImgs[nextR]);
2426 height = this._getPageHeight(nextL);
2427 width = this._getPageWidth(nextL);
2428 scaledW = this.twoPage.height*width/height;
2430 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#BRcontainer').width()-gutter);
2431 $(this.prefetchedImgs[nextL]).css({
2432 position: 'absolute',
2433 right: $('#BRtwopageview').attr('clientWidth')-gutter+'px',
2435 height: this.twoPage.height,
2436 width: 0+'px', // Start at 0 width, then grow to the left
2437 borderRight: '1px solid black',
2441 $('#BRtwopageview').append(this.prefetchedImgs[nextL]);
2445 // getNextLeafs() -- NOT RTL AWARE
2446 //______________________________________________________________________________
2447 // BookReader.prototype.getNextLeafs = function(o) {
2448 // //TODO: we might have two left or two right leafs in a row (damaged book)
2449 // //For now, assume that leafs are contiguous.
2451 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2452 // o.L = this.twoPage.currentIndexL+2;
2453 // o.R = this.twoPage.currentIndexL+3;
2456 // getprevLeafs() -- NOT RTL AWARE
2457 //______________________________________________________________________________
2458 // BookReader.prototype.getPrevLeafs = function(o) {
2459 // //TODO: we might have two left or two right leafs in a row (damaged book)
2460 // //For now, assume that leafs are contiguous.
2462 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2463 // o.L = this.twoPage.currentIndexL-2;
2464 // o.R = this.twoPage.currentIndexL-1;
2467 // pruneUnusedImgs()
2468 //______________________________________________________________________________
2469 BookReader.prototype.pruneUnusedImgs = function() {
2470 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2471 for (var key in this.prefetchedImgs) {
2472 //console.log('key is ' + key);
2473 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2474 //console.log('removing key '+ key);
2475 $(this.prefetchedImgs[key]).remove();
2477 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2478 //console.log('deleting key '+ key);
2479 delete this.prefetchedImgs[key];
2485 //______________________________________________________________________________
2486 BookReader.prototype.prefetch = function() {
2488 // $$$ We should check here if the current indices have finished
2489 // loading (with some timeout) before loading more page images
2490 // See https://bugs.edge.launchpad.net/bookreader/+bug/511391
2492 // prefetch visible pages first
2493 this.prefetchImg(this.twoPage.currentIndexL);
2494 this.prefetchImg(this.twoPage.currentIndexR);
2496 var adjacentPagesToLoad = 3;
2498 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2499 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2501 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2502 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2504 // Load images spreading out from current
2505 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2506 var goingDown = lowCurrent - i;
2507 if (goingDown >= start) {
2508 this.prefetchImg(goingDown);
2510 var goingUp = highCurrent + i;
2511 if (goingUp <= end) {
2512 this.prefetchImg(goingUp);
2517 var lim = this.twoPage.currentIndexL-4;
2519 lim = Math.max(lim, 0);
2520 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2521 this.prefetchImg(i);
2524 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2525 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2526 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2527 this.prefetchImg(i);
2533 // getPageWidth2UP()
2534 //______________________________________________________________________________
2535 BookReader.prototype.getPageWidth2UP = function(index) {
2536 // We return the width based on the dominant height
2537 var height = this._getPageHeight(index);
2538 var width = this._getPageWidth(index);
2539 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2543 //______________________________________________________________________________
2544 BookReader.prototype.search = function(term) {
2545 term = term.replace(/\//g, ' '); // strip slashes
2546 this.searchTerm = term;
2547 $('#BookReaderSearchScript').remove();
2548 var script = document.createElement("script");
2549 script.setAttribute('id', 'BookReaderSearchScript');
2550 script.setAttribute("type", "text/javascript");
2551 script.setAttribute("src", 'http://'+this.server+'/BookReader/flipbook_search_br.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=br.BRSearchCallback');
2552 document.getElementsByTagName('head')[0].appendChild(script);
2553 $('#BookReaderSearchBox').val(term);
2554 $('#BookReaderSearchResults').html('Searching...');
2557 // BRSearchCallback()
2558 //______________________________________________________________________________
2559 BookReader.prototype.BRSearchCallback = function(txt) {
2561 if (jQuery.browser.msie) {
2562 var dom=new ActiveXObject("Microsoft.XMLDOM");
2566 var parser = new DOMParser();
2567 var dom = parser.parseFromString(txt, "text/xml");
2570 $('#BookReaderSearchResults').empty();
2571 $('#BookReaderSearchResults').append('<ul>');
2573 for (var key in this.searchResults) {
2574 if (null != this.searchResults[key].div) {
2575 $(this.searchResults[key].div).remove();
2577 delete this.searchResults[key];
2580 var pages = dom.getElementsByTagName('PAGE');
2582 if (0 == pages.length) {
2583 // $$$ it would be nice to echo the (sanitized) search result here
2584 $('#BookReaderSearchResults').append('<li>No search results found</li>');
2586 for (var i = 0; i < pages.length; i++){
2587 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2590 var re = new RegExp (/_(\d{4})\.djvu/);
2591 var reMatch = re.exec(pages[i].getAttribute('file'));
2592 var index = parseInt(reMatch[1], 10);
2593 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2595 var children = pages[i].childNodes;
2597 for (var j=0; j<children.length; j++) {
2598 //console.log(j + ' - ' + children[j].nodeName);
2599 //console.log(children[j].firstChild.nodeValue);
2600 if ('CONTEXT' == children[j].nodeName) {
2601 context += children[j].firstChild.nodeValue;
2602 } else if ('WORD' == children[j].nodeName) {
2603 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2605 var index = this.leafNumToIndex(index);
2606 if (null != index) {
2607 //coordinates are [left, bottom, right, top, [baseline]]
2608 //we'll skip baseline for now...
2609 var coords = children[j].getAttribute('coords').split(',',4);
2610 if (4 == coords.length) {
2611 this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
2616 var pageName = this.getPageName(index);
2617 var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
2618 var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
2619 //TODO: remove hardcoded instance name
2620 $('#BookReaderSearchResults').append('<li><b><a href="javascript:br.jumpToIndex('+index+','+middleX+','+middleY+');">' + pageName + '</a></b> - ' + context + '</li>');
2623 $('#BookReaderSearchResults').append('</ul>');
2625 // $$$ update again for case of loading search URL in new browser window (search box may not have been ready yet)
2626 $('#BookReaderSearchBox').val(this.searchTerm);
2628 this.updateSearchHilites();
2631 // updateSearchHilites()
2632 //______________________________________________________________________________
2633 BookReader.prototype.updateSearchHilites = function() {
2634 if (2 == this.mode) {
2635 this.updateSearchHilites2UP();
2637 this.updateSearchHilites1UP();
2641 // showSearchHilites1UP()
2642 //______________________________________________________________________________
2643 BookReader.prototype.updateSearchHilites1UP = function() {
2645 for (var key in this.searchResults) {
2647 if (jQuery.inArray(parseInt(key), this.displayedIndices) >= 0) {
2648 var result = this.searchResults[key];
2649 if (null == result.div) {
2650 result.div = document.createElement('div');
2651 $(result.div).attr('className', 'BookReaderSearchHilite').appendTo('#pagediv'+key);
2652 //console.log('appending ' + key);
2655 width: (result.r-result.l)/this.reduce + 'px',
2656 height: (result.b-result.t)/this.reduce + 'px',
2657 left: (result.l)/this.reduce + 'px',
2658 top: (result.t)/this.reduce +'px'
2662 //console.log(key + ' not displayed');
2663 this.searchResults[key].div=null;
2669 //______________________________________________________________________________
2670 // Returns the position of the gutter (line between the page images)
2671 BookReader.prototype.twoPageGutter = function() {
2672 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2676 //______________________________________________________________________________
2677 // Returns the offset for the top of the page images
2678 BookReader.prototype.twoPageTop = function() {
2679 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2682 // twoPageCoverWidth()
2683 //______________________________________________________________________________
2684 // Returns the width of the cover div given the total page width
2685 BookReader.prototype.twoPageCoverWidth = function(totalPageWidth) {
2686 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2689 // twoPageGetViewCenter()
2690 //______________________________________________________________________________
2691 // Returns the percentage offset into twopageview div at the center of container div
2692 // { percentageX: float, percentageY: float }
2693 BookReader.prototype.twoPageGetViewCenter = function() {
2696 var containerOffset = $('#BRcontainer').offset();
2697 var viewOffset = $('#BRtwopageview').offset();
2698 center.percentageX = (containerOffset.left - viewOffset.left + ($('#BRcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2699 center.percentageY = (containerOffset.top - viewOffset.top + ($('#BRcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2704 // twoPageCenterView(percentageX, percentageY)
2705 //______________________________________________________________________________
2706 // Centers the point given by percentage from left,top of twopageview
2707 BookReader.prototype.twoPageCenterView = function(percentageX, percentageY) {
2708 if ('undefined' == typeof(percentageX)) {
2711 if ('undefined' == typeof(percentageY)) {
2715 var viewWidth = $('#BRtwopageview').width();
2716 var containerClientWidth = $('#BRcontainer').attr('clientWidth');
2717 var intoViewX = percentageX * viewWidth;
2719 var viewHeight = $('#BRtwopageview').height();
2720 var containerClientHeight = $('#BRcontainer').attr('clientHeight');
2721 var intoViewY = percentageY * viewHeight;
2723 if (viewWidth < containerClientWidth) {
2724 // Can fit width without scrollbars - center by adjusting offset
2725 $('#BRtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2727 // Need to scroll to center
2728 $('#BRtwopageview').css('left', 0);
2729 $('#BRcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2732 if (viewHeight < containerClientHeight) {
2733 // Fits with scrollbars - add offset
2734 $('#BRtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2736 $('#BRtwopageview').css('top', 0);
2737 $('#BRcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2741 // twoPageFlipAreaHeight
2742 //______________________________________________________________________________
2743 // Returns the integer height of the click-to-flip areas at the edges of the book
2744 BookReader.prototype.twoPageFlipAreaHeight = function() {
2745 return parseInt(this.twoPage.height);
2748 // twoPageFlipAreaWidth
2749 //______________________________________________________________________________
2750 // Returns the integer width of the flip areas
2751 BookReader.prototype.twoPageFlipAreaWidth = function() {
2752 var max = 100; // $$$ TODO base on view width?
2755 var width = this.twoPage.width * 0.15;
2756 return parseInt(BookReader.util.clamp(width, min, max));
2759 // twoPageFlipAreaTop
2760 //______________________________________________________________________________
2761 // Returns integer top offset for flip areas
2762 BookReader.prototype.twoPageFlipAreaTop = function() {
2763 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2766 // twoPageLeftFlipAreaLeft
2767 //______________________________________________________________________________
2768 // Left offset for left flip area
2769 BookReader.prototype.twoPageLeftFlipAreaLeft = function() {
2770 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2773 // twoPageRightFlipAreaLeft
2774 //______________________________________________________________________________
2775 // Left offset for right flip area
2776 BookReader.prototype.twoPageRightFlipAreaLeft = function() {
2777 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2780 // twoPagePlaceFlipAreas
2781 //______________________________________________________________________________
2782 // Readjusts position of flip areas based on current layout
2783 BookReader.prototype.twoPagePlaceFlipAreas = function() {
2784 // We don't set top since it shouldn't change relative to view
2785 $(this.twoPage.leftFlipArea).css({
2786 left: this.twoPageLeftFlipAreaLeft() + 'px',
2787 width: this.twoPageFlipAreaWidth() + 'px'
2789 $(this.twoPage.rightFlipArea).css({
2790 left: this.twoPageRightFlipAreaLeft() + 'px',
2791 width: this.twoPageFlipAreaWidth() + 'px'
2795 // showSearchHilites2UP()
2796 //______________________________________________________________________________
2797 BookReader.prototype.updateSearchHilites2UP = function() {
2799 for (var key in this.searchResults) {
2800 key = parseInt(key, 10);
2801 if (jQuery.inArray(key, this.displayedIndices) >= 0) {
2802 var result = this.searchResults[key];
2803 if (null == result.div) {
2804 result.div = document.createElement('div');
2805 $(result.div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
2806 //console.log('appending ' + key);
2809 // We calculate the reduction factor for the specific page because it can be different
2810 // for each page in the spread
2811 var height = this._getPageHeight(key);
2812 var width = this._getPageWidth(key)
2813 var reduce = this.twoPage.height/height;
2814 var scaledW = parseInt(width*reduce);
2816 var gutter = this.twoPageGutter();
2818 if ('L' == this.getPageSide(key)) {
2819 pageL = gutter-scaledW;
2823 var pageT = this.twoPageTop();
2826 width: (result.r-result.l)*reduce + 'px',
2827 height: (result.b-result.t)*reduce + 'px',
2828 left: pageL+(result.l)*reduce + 'px',
2829 top: pageT+(result.t)*reduce +'px'
2833 //console.log(key + ' not displayed');
2834 if (null != this.searchResults[key].div) {
2835 //console.log('removing ' + key);
2836 $(this.searchResults[key].div).remove();
2838 this.searchResults[key].div=null;
2843 // removeSearchHilites()
2844 //______________________________________________________________________________
2845 BookReader.prototype.removeSearchHilites = function() {
2846 for (var key in this.searchResults) {
2847 if (null != this.searchResults[key].div) {
2848 $(this.searchResults[key].div).remove();
2849 this.searchResults[key].div=null;
2855 //______________________________________________________________________________
2856 BookReader.prototype.printPage = function() {
2857 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2860 // Get print URI from current indices and mode
2861 BookReader.prototype.getPrintURI = function() {
2863 if (this.constMode2up == this.mode) {
2864 indexToPrint = this.twoPage.currentIndexL;
2866 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2869 var options = 'id=' + this.subPrefix + '&server=' + this.server + '&zip=' + this.zip
2870 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2871 + '&width=' + this._getPageWidth(indexToPrint) + '&height=' + this._getPageHeight(indexToPrint);
2873 if (this.constMode2up == this.mode) {
2874 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this._getPageWidth(this.twoPage.currentIndexR);
2875 options += '&height2=' + this._getPageHeight(this.twoPage.currentIndexR);
2876 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2878 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2881 return '/bookreader/print.php?' + options;
2884 /* iframe implementation
2885 BookReader.prototype.getPrintFrameContent = function(index) {
2886 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2887 // 8.5x11 so we should end up not overflowing on either paper size.
2888 var paperAspect = 8.5 / 11;
2889 var imageAspect = this._getPageWidth(index) / this._getPageHeight(index);
2893 // Rotate if possible and appropriate, to get larger image size on printed page
2894 if (this.canRotatePage(index)) {
2895 if (imageAspect > 1 && imageAspect > paperAspect) {
2896 // more wide than square, and more wide than paper
2898 imageAspect = 1/imageAspect;
2903 if (imageAspect > paperAspect) {
2904 // wider than paper, fit width
2905 fitAttrs = 'width="95%"';
2907 // taller than paper, fit height
2908 fitAttrs = 'height="95%"';
2911 var imageURL = this._getPageURI(index, 1, rotate);
2912 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2913 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2914 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2915 iframeStr += '</div>';
2916 iframeStr += '</body></html>';
2921 BookReader.prototype.updatePrintFrame = function(delta) {
2922 var newIndex = this.indexToPrint + delta;
2923 newIndex = BookReader.util.clamp(newIndex, 0, this.numLeafs - 1);
2924 if (newIndex == this.indexToPrint) {
2927 this.indexToPrint = newIndex;
2928 var doc = BookReader.util.getIFrameDocument($('#printFrame')[0]);
2929 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2934 //______________________________________________________________________________
2935 BookReader.prototype.showEmbedCode = function() {
2936 if (null != this.embedPopup) { // check if already showing
2940 this.embedPopup = document.createElement("div");
2941 $(this.embedPopup).css({
2942 position: 'absolute',
2944 left: ($('#BRcontainer').attr('clientWidth')-400)/2 + 'px',
2947 border: "3px double #999999",
2949 backgroundColor: "#fff"
2950 }).appendTo('#BookReader');
2952 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
2953 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>';
2954 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
2955 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2957 this.embedPopup.innerHTML = htmlStr;
2958 $(this.embedPopup).find('input').bind('click', function() {
2964 //______________________________________________________________________________
2965 BookReader.prototype.autoToggle = function() {
2967 var bComingFrom1up = false;
2968 if (2 != this.mode) {
2969 bComingFrom1up = true;
2973 // Change to autofit if book is too large
2974 if (this.reduce < this.twoPageGetAutofitReduce()) {
2975 this.zoom2up('auto');
2979 if (null == this.autoTimer) {
2980 this.flipSpeed = 2000;
2982 // $$$ Draw events currently cause layout problems when they occur during animation.
2983 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
2984 // we workaround for now by not triggering immediate animation in that case.
2985 // See https://bugs.launchpad.net/gnubook/+bug/328327
2986 if (('rl' == this.pageProgression) && bComingFrom1up) {
2987 // don't flip immediately -- wait until timer fires
2990 this.flipFwdToIndex();
2993 $('#BRtoolbar .play').hide();
2994 $('#BRtoolbar .pause').show();
2995 this.autoTimer=setInterval(function(){
2996 if (self.animating) {return;}
2998 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
2999 self.flipBackToIndex(1); // $$$ really what we want?
3001 self.flipFwdToIndex();
3010 //______________________________________________________________________________
3011 // Stop autoplay mode, allowing animations to finish
3012 BookReader.prototype.autoStop = function() {
3013 if (null != this.autoTimer) {
3014 clearInterval(this.autoTimer);
3015 this.flipSpeed = 'fast';
3016 $('#BRtoolbar .pause').hide();
3017 $('#BRtoolbar .play').show();
3018 this.autoTimer = null;
3022 // stopFlipAnimations
3023 //______________________________________________________________________________
3024 // Immediately stop flip animations. Callbacks are triggered.
3025 BookReader.prototype.stopFlipAnimations = function() {
3027 this.autoStop(); // Clear timers
3029 // Stop animation, clear queue, trigger callbacks
3030 if (this.leafEdgeTmp) {
3031 $(this.leafEdgeTmp).stop(false, true);
3033 jQuery.each(this.prefetchedImgs, function() {
3034 $(this).stop(false, true);
3037 // And again since animations also queued in callbacks
3038 if (this.leafEdgeTmp) {
3039 $(this.leafEdgeTmp).stop(false, true);
3041 jQuery.each(this.prefetchedImgs, function() {
3042 $(this).stop(false, true);
3047 // keyboardNavigationIsDisabled(event)
3048 // - returns true if keyboard navigation should be disabled for the event
3049 //______________________________________________________________________________
3050 BookReader.prototype.keyboardNavigationIsDisabled = function(event) {
3051 if (event.target.tagName == "INPUT") {
3057 // gutterOffsetForIndex
3058 //______________________________________________________________________________
3060 // Returns the gutter offset for the spread containing the given index.
3061 // This function supports RTL
3062 BookReader.prototype.gutterOffsetForIndex = function(pindex) {
3064 // To find the offset of the gutter from the middle we calculate our percentage distance
3065 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
3066 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
3068 // But then again for RTL it's the opposite
3069 if ('rl' == this.pageProgression) {
3077 //______________________________________________________________________________
3078 // Returns the width of the leaf edge div for the page with index given
3079 BookReader.prototype.leafEdgeWidth = function(pindex) {
3080 // $$$ could there be single pixel rounding errors for L vs R?
3081 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
3082 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3084 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3088 // jumpIndexForLeftEdgePageX
3089 //______________________________________________________________________________
3090 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
3091 BookReader.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
3092 if ('rl' != this.pageProgression) {
3093 // LTR - flipping backward
3094 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3096 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
3097 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
3101 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3102 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
3107 // jumpIndexForRightEdgePageX
3108 //______________________________________________________________________________
3109 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
3110 BookReader.prototype.jumpIndexForRightEdgePageX = function(pageX) {
3111 if ('rl' != this.pageProgression) {
3113 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
3114 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
3117 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
3118 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
3123 BookReader.prototype.initToolbar = function(mode, ui) {
3125 $("#BookReader").append("<div id='BRtoolbar'>"
3126 + "<span id='BRtoolbarbuttons' style='float: right'>"
3127 + "<button class='BRicon print rollover' /> <button class='BRicon rollover embed' />"
3128 + "<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>"
3129 + "<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>"
3130 + "<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>"
3131 + "<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>"
3132 + "<button class='BRicon rollover play' /><button class='BRicon rollover pause' style='display: none' />"
3136 + "<a class='BRicon logo rollover' href='" + this.logoURL + "'> </a>"
3137 + " <button class='BRicon rollover zoom_out' onclick='br.zoom(-1); return false;'/>"
3138 + "<button class='BRicon rollover zoom_in' onclick='br.zoom(1); return false;'/>"
3139 + " <span class='label'>Zoom: <span id='BRzoom'>"+parseInt(100/this.reduce)+"</span></span>"
3140 + " <button class='BRicon rollover one_page_mode' onclick='br.switchMode(1); return false;'/>"
3141 + " <button class='BRicon rollover two_page_mode' onclick='br.switchMode(2); return false;'/>"
3142 + " <button class='BRicon rollover thumbnail_mode' onclick='br.switchMode(3); return false;'/>"
3145 + "<span id='#BRbooktitle'>"
3146 + " <a class='BRblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
3150 this.updateToolbarZoom(this.reduce); // Pretty format
3152 if (ui == "embed" || ui == "touch") {
3153 $("#BookReader a.logo").attr("target","_blank");
3156 // $$$ turn this into a member variable
3157 var jToolbar = $('#BRtoolbar'); // j prefix indicates jQuery object
3159 // We build in mode 2
3162 this.bindToolbarNavHandlers(jToolbar);
3164 // Setup tooltips -- later we could load these from a file for i18n
3165 var titles = { '.logo': 'Go to Archive.org',
3166 '.zoom_in': 'Zoom in',
3167 '.zoom_out': 'Zoom out',
3168 '.one_page_mode': 'One-page view',
3169 '.two_page_mode': 'Two-page view',
3170 '.thumbnail_mode': 'Thumbnail view',
3171 '.print': 'Print this page',
3172 '.embed': 'Embed bookreader',
3173 '.book_left': 'Flip left',
3174 '.book_right': 'Flip right',
3175 '.book_up': 'Page up',
3176 '.book_down': 'Page down',
3179 '.book_top': 'First page',
3180 '.book_bottom': 'Last page'
3182 if ('rl' == this.pageProgression) {
3183 titles['.book_leftmost'] = 'Last page';
3184 titles['.book_rightmost'] = 'First page';
3186 titles['.book_leftmost'] = 'First page';
3187 titles['.book_rightmost'] = 'Last page';
3190 for (var icon in titles) {
3191 jToolbar.find(icon).attr('title', titles[icon]);
3194 // Hide mode buttons and autoplay if 2up is not available
3195 // $$$ if we end up with more than two modes we should show the applicable buttons
3196 if ( !this.canSwitchToMode(this.constMode2up) ) {
3197 jToolbar.find('.two_page_mode, .play, .pause').hide();
3199 if ( !this.canSwitchToMode(this.constModeThumb) ) {
3200 jToolbar.find('.thumbnail_mode').hide();
3203 // Hide one page button if it is the only mode available
3204 if ( ! (this.canSwitchToMode(this.constMode2up) || this.canSwitchToMode(this.constModeThumb)) ) {
3205 jToolbar.find('.one_page_mode').hide();
3208 // Switch to requested mode -- binds other click handlers
3209 this.switchToolbarMode(mode);
3214 // switchToolbarMode
3215 //______________________________________________________________________________
3216 // Update the toolbar for the given mode (changes navigation buttons)
3217 // $$$ we should soon split the toolbar out into its own module
3218 BookReader.prototype.switchToolbarMode = function(mode) {
3221 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3222 $('#BRtoolbar .BRtoolbarmode2').hide();
3223 $('#BRtoolbar .BRtoolbarmode3').hide();
3224 $('#BRtoolbar .BRtoolbarmode1').show().css('display', 'inline');
3225 } else if (2 == mode) {
3227 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3228 $('#BRtoolbar .BRtoolbarmode1').hide();
3229 $('#BRtoolbar .BRtoolbarmode3').hide();
3230 $('#BRtoolbar .BRtoolbarmode2').show().css('display', 'inline');
3233 $('#BRtoolbar .BRtoolbarzoom').hide();
3234 $('#BRtoolbar .BRtoolbarmode2').hide();
3235 $('#BRtoolbar .BRtoolbarmode1').hide();
3236 $('#BRtoolbar .BRtoolbarmode3').show().css('display', 'inline');
3240 // bindToolbarNavHandlers
3241 //______________________________________________________________________________
3242 // Binds the toolbar handlers
3243 BookReader.prototype.bindToolbarNavHandlers = function(jToolbar) {
3245 var self = this; // closure
3247 jToolbar.find('.book_left').bind('click', function(e) {
3252 jToolbar.find('.book_right').bind('click', function(e) {
3257 jToolbar.find('.book_up').bind('click', function(e) {
3258 if ($.inArray(self.mode, [self.constMode1up, self.constModeThumb]) >= 0) {
3266 jToolbar.find('.book_down').bind('click', function(e) {
3267 if ($.inArray(self.mode, [self.constMode1up, self.constModeThumb]) >= 0) {
3275 jToolbar.find('.print').bind('click', function(e) {
3280 jToolbar.find('.embed').bind('click', function(e) {
3281 self.showEmbedCode();
3285 jToolbar.find('.play').bind('click', function(e) {
3290 jToolbar.find('.pause').bind('click', function(e) {
3295 jToolbar.find('.book_top').bind('click', function(e) {
3300 jToolbar.find('.book_bottom').bind('click', function(e) {
3305 jToolbar.find('.book_leftmost').bind('click', function(e) {
3310 jToolbar.find('.book_rightmost').bind('click', function(e) {
3316 // updateToolbarZoom(reduce)
3317 //______________________________________________________________________________
3318 // Update the displayed zoom factor based on reduction factor
3319 BookReader.prototype.updateToolbarZoom = function(reduce) {
3323 // $$$ TODO preserve zoom/fit for each mode
3324 if (this.mode == this.constMode2up) {
3325 autofit = this.twoPage.autofit;
3327 autofit = this.onePage.autofit;
3331 value = autofit.slice(0,1).toUpperCase() + autofit.slice(1);
3333 value = (100 / reduce).toFixed(2);
3334 // Strip trailing zeroes and decimal if all zeroes
3335 value = value.replace(/0+$/,'');
3336 value = value.replace(/\.$/,'');
3339 $('#BRzoom').text(value);
3342 // firstDisplayableIndex
3343 //______________________________________________________________________________
3344 // Returns the index of the first visible page, dependent on the mode.
3345 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3346 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
3347 BookReader.prototype.firstDisplayableIndex = function() {
3348 if (this.mode != this.constMode2up) {
3352 if ('rl' != this.pageProgression) {
3354 if (this.getPageSide(0) == 'L') {
3361 if (this.getPageSide(0) == 'R') {
3369 // lastDisplayableIndex
3370 //______________________________________________________________________________
3371 // Returns the index of the last visible page, dependent on the mode.
3372 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3373 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
3374 BookReader.prototype.lastDisplayableIndex = function() {
3376 var lastIndex = this.numLeafs - 1;
3378 if (this.mode != this.constMode2up) {
3382 if ('rl' != this.pageProgression) {
3384 if (this.getPageSide(lastIndex) == 'R') {
3387 return lastIndex + 1;
3391 if (this.getPageSide(lastIndex) == 'L') {
3394 return lastIndex + 1;
3399 // shortTitle(maximumCharacters)
3401 // Returns a shortened version of the title with the maximum number of characters
3402 BookReader.prototype.shortTitle = function(maximumCharacters) {
3403 if (this.bookTitle.length < maximumCharacters) {
3404 return this.bookTitle;
3407 var title = this.bookTitle.substr(0, maximumCharacters - 3);
3412 // Parameter related functions
3414 // updateFromParams(params)
3416 // Update ourselves from the params object.
3418 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
3419 BookReader.prototype.updateFromParams = function(params) {
3420 if ('undefined' != typeof(params.mode)) {
3421 this.switchMode(params.mode);
3425 if ('undefined' != typeof(params.searchTerm)) {
3426 if (this.searchTerm != params.searchTerm) {
3427 this.search(params.searchTerm);
3431 // $$$ process /zoom
3433 // We only respect page if index is not set
3434 if ('undefined' != typeof(params.index)) {
3435 if (params.index != this.currentIndex()) {
3436 this.jumpToIndex(params.index);
3438 } else if ('undefined' != typeof(params.page)) {
3439 // $$$ this assumes page numbers are unique
3440 if (params.page != this.getPageNum(this.currentIndex())) {
3441 this.jumpToPage(params.page);
3445 // $$$ process /region
3446 // $$$ process /highlight
3449 // paramsFromFragment(urlFragment)
3451 // Returns a object with configuration parametes from a URL fragment.
3453 // E.g paramsFromFragment(window.location.hash)
3454 BookReader.prototype.paramsFromFragment = function(urlFragment) {
3455 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
3459 // For convenience we allow an initial # character (as from window.location.hash)
3460 // but don't require it
3461 if (urlFragment.substr(0,1) == '#') {
3462 urlFragment = urlFragment.substr(1);
3465 // Simple #nn syntax
3466 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3467 if ( !isNaN(oldStyleLeafNum) ) {
3468 params.index = oldStyleLeafNum;
3470 // Done processing if using old-style syntax
3474 // Split into key-value pairs
3475 var urlArray = urlFragment.split('/');
3477 for (var i = 0; i < urlArray.length; i += 2) {
3478 urlHash[urlArray[i]] = urlArray[i+1];
3482 if ('1up' == urlHash['mode']) {
3483 params.mode = this.constMode1up;
3484 } else if ('2up' == urlHash['mode']) {
3485 params.mode = this.constMode2up;
3486 } else if ('thumb' == urlHash['mode']) {
3487 params.mode = this.constModeThumb;
3491 if ('undefined' != typeof(urlHash['page'])) {
3492 // page was set -- may not be int
3493 params.page = urlHash['page'];
3496 // $$$ process /region
3497 // $$$ process /search
3499 if (urlHash['search'] != undefined) {
3500 params.searchTerm = BookReader.util.decodeURIComponentPlus(urlHash['search']);
3503 // $$$ process /highlight
3508 // paramsFromCurrent()
3510 // Create a params object from the current parameters.
3511 BookReader.prototype.paramsFromCurrent = function() {
3515 var index = this.currentIndex();
3516 var pageNum = this.getPageNum(index);
3517 if ((pageNum === 0) || pageNum) {
3518 params.page = pageNum;
3521 params.index = index;
3522 params.mode = this.mode;
3528 if (this.searchHighlightVisible()) {
3529 params.searchTerm = this.searchTerm;
3535 // fragmentFromParams(params)
3537 // Create a fragment string from the params object.
3538 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3539 BookReader.prototype.fragmentFromParams = function(params) {
3540 var separator = '/';
3544 if ('undefined' != typeof(params.page)) {
3545 fragments.push('page', params.page);
3547 // Don't have page numbering -- use index instead
3548 fragments.push('page', 'n' + params.index);
3555 if ('undefined' != typeof(params.mode)) {
3556 if (params.mode == this.constMode1up) {
3557 fragments.push('mode', '1up');
3558 } else if (params.mode == this.constMode2up) {
3559 fragments.push('mode', '2up');
3560 } else if (params.mode == this.constModeThumb) {
3561 fragments.push('mode', 'thumb');
3563 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3568 if (params.searchTerm) {
3569 fragments.push('search', params.searchTerm);
3572 return BookReader.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3575 // getPageIndex(pageNum)
3577 // Returns the *highest* index the given page number, or undefined
3578 BookReader.prototype.getPageIndex = function(pageNum) {
3579 var pageIndices = this.getPageIndices(pageNum);
3581 if (pageIndices.length > 0) {
3582 return pageIndices[pageIndices.length - 1];
3588 // getPageIndices(pageNum)
3590 // Returns an array (possibly empty) of the indices with the given page number
3591 BookReader.prototype.getPageIndices = function(pageNum) {
3594 // Check for special "nXX" page number
3595 if (pageNum.slice(0,1) == 'n') {
3597 var pageIntStr = pageNum.slice(1, pageNum.length);
3598 var pageIndex = parseInt(pageIntStr);
3599 indices.push(pageIndex);
3602 // Do nothing... will run through page names and see if one matches
3607 for (i=0; i<this.numLeafs; i++) {
3608 if (this.getPageNum(i) == pageNum) {
3616 // getPageName(index)
3618 // Returns the name of the page as it should be displayed in the user interface
3619 BookReader.prototype.getPageName = function(index) {
3620 return 'Page ' + this.getPageNum(index);
3623 // updateLocationHash
3625 // Update the location hash from the current parameters. Call this instead of manually
3626 // using window.location.replace
3627 BookReader.prototype.updateLocationHash = function() {
3628 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3629 window.location.replace(newHash);
3631 // This is the variable checked in the timer. Only user-generated changes
3632 // to the URL will trigger the event.
3633 this.oldLocationHash = newHash;
3636 // startLocationPolling
3638 // Starts polling of window.location to see hash fragment changes
3639 BookReader.prototype.startLocationPolling = function() {
3640 var self = this; // remember who I am
3641 self.oldLocationHash = window.location.hash;
3643 if (this.locationPollId) {
3644 clearInterval(this.locationPollID);
3645 this.locationPollId = null;
3648 this.locationPollId = setInterval(function() {
3649 var newHash = window.location.hash;
3650 if (newHash != self.oldLocationHash) {
3651 if (newHash != self.oldUserHash) { // Only process new user hash once
3652 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3654 // Queue change if animating
3655 if (self.animating) {
3657 self.animationFinishedCallback = function() {
3658 self.updateFromParams(self.paramsFromFragment(newHash));
3660 } else { // update immediately
3661 self.updateFromParams(self.paramsFromFragment(newHash));
3663 self.oldUserHash = newHash;
3671 // Returns true if we can switch to the requested mode
3672 BookReader.prototype.canSwitchToMode = function(mode) {
3673 if (mode == this.constMode2up || mode == this.constModeThumb) {
3674 // check there are enough pages to display
3675 // $$$ this is a workaround for the mis-feature that we can't display
3676 // short books in 2up mode
3677 if (this.numLeafs < 2) {
3685 // searchHighlightVisible
3687 // Returns true if a search highlight is currently being displayed
3688 BookReader.prototype.searchHighlightVisible = function() {
3689 if (this.constMode2up == this.mode) {
3690 if (this.searchResults[this.twoPage.currentIndexL]
3691 || this.searchResults[this.twoPage.currentIndexR]) {
3695 if (this.searchResults[this.currentIndex()]) {
3704 // Returns the page width for the given index, or first or last page if out of range
3705 BookReader.prototype._getPageWidth = function(index) {
3706 // Synthesize a page width for pages not actually present in book.
3707 // May or may not be the best approach.
3708 // If index is out of range we return the width of first or last page
3709 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3710 return this.getPageWidth(index);
3715 // Returns the page height for the given index, or first or last page if out of range
3716 BookReader.prototype._getPageHeight= function(index) {
3717 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3718 return this.getPageHeight(index);
3723 // Returns the page URI or transparent image if out of range
3724 BookReader.prototype._getPageURI = function(index, reduce, rotate) {
3725 if (index < 0 || index >= this.numLeafs) { // Synthesize page
3726 return this.imagesBaseURL + "/transparent.png";
3729 if ('undefined' == typeof(reduce)) {
3730 // reduce not passed in
3731 // $$$ this probably won't work for thumbnail mode
3732 var ratio = this.getPageHeight(index) / this.twoPage.height;
3734 // $$$ we make an assumption here that the scales are available pow2 (like kakadu)
3737 } else if (ratio < 4) {
3739 } else if (ratio < 8) {
3741 } else if (ratio < 16) {
3743 } else if (ratio < 32) {
3751 return this.getPageURI(index, reduce, rotate);
3754 // Library functions
3756 disableSelect: function(jObject) {
3757 // Bind mouse handlers
3758 // Disable mouse click to avoid selected/highlighted page images - bug 354239
3759 jObject.bind('mousedown', function(e) {
3760 // $$$ check here for right-click and don't disable. Also use jQuery style
3761 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
3764 // Special hack for IE7
3765 jObject[0].onselectstart = function(e) { return false; };
3768 clamp: function(value, min, max) {
3769 return Math.min(Math.max(value, min), max);
3772 notInArray: function(value, array) {
3773 // inArray returns -1 or undefined if value not in array
3774 return ! (jQuery.inArray(value, array) >= 0);
3777 getIFrameDocument: function(iframe) {
3778 // Adapted from http://xkr.us/articles/dom/iframe-document/
3779 var outer = (iframe.contentWindow || iframe.contentDocument);
3780 return (outer.document || outer);
3783 decodeURIComponentPlus: function(value) {
3784 // Decodes a URI component and converts '+' to ' '
3785 return decodeURIComponent(value).replace(/\+/g, ' ');
3788 encodeURIComponentPlus: function(value) {
3789 // Encodes a URI component and converts ' ' to '+'
3790 return encodeURIComponent(value).replace(/%20/g, '+');
3792 // The final property here must NOT have a comma after it - IE7