2 Copyright(c)2008-2009 Internet Archive. Software license AGPL version 3.
4 This file is part of BookReader.
6 BookReader is free software: you can redistribute it and/or modify
7 it under the terms of the GNU Affero General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 BookReader is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU Affero General Public License for more details.
16 You should have received a copy of the GNU Affero General Public License
17 along with BookReader. If not, see <http://www.gnu.org/licenses/>.
19 The BookReader source is hosted at http://github.com/openlibrary/bookreader/
21 archive.org cvs $Revision: 1.2 $ $Date: 2009-06-22 18:42:51 $
25 //______________________________________________________________________________
26 // After you instantiate this object, you must supply the following
27 // book-specific functions, before calling init(). Some of these functions
28 // can just be stubs for simple books.
35 // - getSpreadIndices()
36 // You must also add a numLeafs property before calling init().
38 function BookReader() {
41 this.mode = 1; //1, 2, 3
42 this.ui = 'full'; // UI mode
45 this.thumbWidth = 100; // will be overridden during prepareThumbnailView
46 this.thumbRowBuffer = 2; // number of rows to pre-cache out a view
47 this.thumbColumns = 6; // default
48 this.thumbMaxLoading = 4; // number of thumbnails to load at once
49 this.displayedRows=[];
51 this.displayedIndices = [];
52 //this.indicesToDisplay = [];
54 this.prefetchedImgs = {}; //an object with numeric keys cooresponding to page index
57 this.animating = false;
59 this.autoTimer = null;
60 this.flipSpeed = 'fast';
62 this.twoPagePopUp = null;
63 this.leafEdgeTmp = null;
64 this.embedPopup = null;
65 this.printPopup = null;
68 this.searchResults = {};
70 this.firstIndex = null;
72 this.lastDisplayableIndex2up = null;
74 // We link to index.php to avoid redirect which breaks back button
75 this.logoURL = 'http://www.archive.org/index.php';
77 // Base URL for images
78 this.imagesBaseURL = '/bookreader/images/';
81 this.constMode1up = 1;
82 this.constMode2up = 2;
83 this.constModeThumb = 3;
86 this.reductionFactors = [0.5, 1, 2, 4, 8, 16];
88 // Object to hold parameters related to 2up mode
90 coverInternalPadding: 10, // Width of cover
91 coverExternalPadding: 10, // Padding outside of cover
92 bookSpineDivWidth: 30, // Width of book spine $$$ consider sizing based on book length
96 // Background color for pages (e.g. when loading page image)
97 // $$$ TODO dynamically calculate based on page images
98 this.pageDefaultBackgroundColor = 'rgb(234, 226, 205)';
104 //______________________________________________________________________________
105 BookReader.prototype.init = function() {
107 var startIndex = undefined;
108 this.pageScale = this.reduce; // preserve current reduce
110 // Find start index and mode if set in location hash
111 var params = this.paramsFromFragment(window.location.hash);
113 if ('undefined' != typeof(params.index)) {
114 startIndex = params.index;
115 } else if ('undefined' != typeof(params.page)) {
116 startIndex = this.getPageIndex(params.page);
119 if ('undefined' == typeof(startIndex)) {
120 if ('undefined' != typeof(this.titleLeaf)) {
121 startIndex = this.leafNumToIndex(this.titleLeaf);
125 if ('undefined' == typeof(startIndex)) {
129 if ('undefined' != typeof(params.mode)) {
130 this.mode = params.mode;
133 // Set document title -- may have already been set in enclosing html for
134 // search engine visibility
135 document.title = this.shortTitle(50);
137 // Sanitize parameters
138 if ( !this.canSwitchToMode( this.mode ) ) {
139 this.mode = this.constMode1up;
142 $("#BookReader").empty();
143 this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
144 $("#BookReader").append("<div id='BRcontainer'></div>");
145 $("#BRcontainer").append("<div id='BRpageview'></div>");
147 $("#BRcontainer").bind('scroll', this, function(e) {
151 this.setupKeyListeners();
152 this.startLocationPolling();
154 $(window).bind('resize', this, function(e) {
155 //console.log('resize!');
156 if (1 == e.data.mode) {
157 //console.log('centering 1page view');
158 e.data.centerPageView();
159 $('#BRpageview').empty()
160 e.data.displayedIndices = [];
161 e.data.updateSearchHilites(); //deletes hilights but does not call remove()
163 } else if (3 == e.data.mode){
164 e.data.prepareThumbnailView();
166 //console.log('drawing 2 page view');
168 // We only need to prepare again in autofit (size of spread changes)
169 if (e.data.twoPage.autofit) {
170 e.data.prepareTwoPageView();
172 // Re-center if the scrollbars have disappeared
173 var center = e.data.twoPageGetViewCenter();
174 var doRecenter = false;
175 if (e.data.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
176 center.percentageX = 0.5;
179 if (e.data.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
180 center.percentageY = 0.5;
184 e.data.twoPageCenterView(center.percentageX, center.percentageY);
190 $('.BRpagediv1up').bind('mousedown', this, function(e) {
191 // $$$ the purpose of this is to disable selection of the image (makes it turn blue)
192 // but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
196 // $$$ refactor this so it's enough to set the first index and call preparePageView
197 // (get rid of mode-specific logic at this point)
198 if (1 == this.mode) {
199 this.resizePageView();
200 this.firstIndex = startIndex;
201 this.jumpToIndex(startIndex);
202 } else if (3 == this.mode) {
203 this.firstIndex = startIndex;
204 this.prepareThumbnailView();
205 this.jumpToIndex(startIndex);
207 //this.resizePageView();
209 this.displayedIndices=[0];
210 this.firstIndex = startIndex;
211 this.displayedIndices = [this.firstIndex];
212 //console.log('titleLeaf: %d', this.titleLeaf);
213 //console.log('displayedIndices: %s', this.displayedIndices);
214 this.prepareTwoPageView();
217 // Enact other parts of initial params
218 this.updateFromParams(params);
221 BookReader.prototype.setupKeyListeners = function() {
234 // We use document here instead of window to avoid a bug in jQuery on IE7
235 $(document).keydown(function(e) {
237 // Keyboard navigation
238 if (!self.keyboardNavigationIsDisabled(e)) {
242 // In 1up mode page scrolling is handled by browser
243 if (2 == self.mode) {
250 if (2 == self.mode) {
264 if (2 == self.mode) {
270 if (2 == self.mode) {
281 //______________________________________________________________________________
282 BookReader.prototype.drawLeafs = function() {
283 if (1 == this.mode) {
284 this.drawLeafsOnePage();
285 } else if(3 == this.mode) {
286 this.drawLeafsThumbnail();
288 this.drawLeafsTwoPage();
294 //______________________________________________________________________________
295 BookReader.prototype.setDragHandler = function(div) {
296 div.dragging = false;
298 $(div).unbind('mousedown').bind('mousedown', function(e) {
301 //console.log('mousedown at ' + e.pageY);
303 this.dragging = true;
304 this.prevMouseX = e.pageX;
305 this.prevMouseY = e.pageY;
307 var startX = e.pageX;
308 var startY = e.pageY;
309 var startTop = $('#BRcontainer').attr('scrollTop');
310 var startLeft = $('#BRcontainer').attr('scrollLeft');
314 $(div).unbind('mousemove').bind('mousemove', function(ee) {
317 // console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
319 var offsetX = ee.pageX - this.prevMouseX;
320 var offsetY = ee.pageY - this.prevMouseY;
323 $('#BRcontainer').attr('scrollTop', $('#BRcontainer').attr('scrollTop') - offsetY);
324 $('#BRcontainer').attr('scrollLeft', $('#BRcontainer').attr('scrollLeft') - offsetX);
327 this.prevMouseX = ee.pageX;
328 this.prevMouseY = ee.pageY;
332 $(div).unbind('mouseup').bind('mouseup', function(ee) {
334 //console.log('mouseup');
336 this.dragging = false;
339 $(div).unbind('mouseleave').bind('mouseleave', function(e) {
341 //console.log('mouseleave');
343 this.dragging = false;
346 $(div).unbind('mouseenter').bind('mouseenter', function(e) {
348 //console.log('mouseenter');
350 this.dragging = false;
354 // setDragHandler2UP()
355 //______________________________________________________________________________
356 BookReader.prototype.setDragHandler2UP = function(div) {
357 div.dragging = false;
359 $(div).unbind('mousedown').bind('mousedown', function(e) {
362 //console.log('mousedown at ' + e.pageY);
364 this.dragStart = {x: e.pageX, y: e.pageY };
365 this.mouseDown = true;
366 this.dragging = false; // wait until drag distance
367 this.prevMouseX = e.pageX;
368 this.prevMouseY = e.pageY;
370 var startX = e.pageX;
371 var startY = e.pageY;
372 var startTop = $('#BRcontainer').attr('scrollTop');
373 var startLeft = $('#BRcontainer').attr('scrollLeft');
377 $(div).unbind('mousemove').bind('mousemove', function(ee) {
380 // console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
382 var offsetX = ee.pageX - this.prevMouseX;
383 var offsetY = ee.pageY - this.prevMouseY;
385 var minDragDistance = 5; // $$$ constant
387 var distance = Math.max(Math.abs(offsetX), Math.abs(offsetY));
389 if (this.mouseDown && (distance > minDragDistance)) {
390 //console.log('drag start!');
392 this.dragging = true;
396 $('#BRcontainer').attr('scrollTop', $('#BRcontainer').attr('scrollTop') - offsetY);
397 $('#BRcontainer').attr('scrollLeft', $('#BRcontainer').attr('scrollLeft') - offsetX);
398 this.prevMouseX = ee.pageX;
399 this.prevMouseY = ee.pageY;
406 $(div).unbind('mouseup').bind('mouseup', function(ee) {
408 //console.log('mouseup');
410 this.dragging = false;
411 this.mouseDown = false;
416 $(div).unbind('mouseleave').bind('mouseleave', function(e) {
418 //console.log('mouseleave');
420 this.dragging = false;
421 this.mouseDown = false;
424 $(div).unbind('mouseenter').bind('mouseenter', function(e) {
426 //console.log('mouseenter');
428 this.dragging = false;
429 this.mouseDown = false;
433 BookReader.prototype.setClickHandler2UP = function( element, data, handler) {
434 //console.log('setting handler');
435 //console.log(element.tagName);
437 $(element).unbind('click').bind('click', data, function(e) {
440 //console.log('click!');
442 if (this.mouseDown && (!this.dragging)) {
443 //console.log('click not dragging!');
447 this.dragging = false;
448 this.mouseDown = false;
452 // drawLeafsOnePage()
453 //______________________________________________________________________________
454 BookReader.prototype.drawLeafsOnePage = function() {
455 //alert('drawing leafs!');
459 var scrollTop = $('#BRcontainer').attr('scrollTop');
460 var scrollBottom = scrollTop + $('#BRcontainer').height();
461 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
463 var indicesToDisplay = [];
468 for (i=0; i<this.numLeafs; i++) {
469 var height = parseInt(this._getPageHeight(i)/this.reduce);
471 leafBottom += height;
472 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
473 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
474 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
475 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
476 if (topInView | bottomInView | middleInView) {
477 //console.log('displayed: ' + this.displayedIndices);
478 //console.log('to display: ' + i);
479 indicesToDisplay.push(i);
481 leafTop += height +10;
485 var firstIndexToDraw = indicesToDisplay[0];
486 this.firstIndex = firstIndexToDraw;
488 // Update hash, but only if we're currently displaying a leaf
489 // Hack that fixes #365790
490 if (this.displayedIndices.length > 0) {
491 this.updateLocationHash();
494 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
496 indicesToDisplay.unshift(firstIndexToDraw);
499 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
500 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
501 indicesToDisplay.push(lastIndexToDraw+1);
506 for (i=0; i<firstIndexToDraw; i++) {
507 leafTop += parseInt(this._getPageHeight(i)/this.reduce) +10;
510 //var viewWidth = $('#BRpageview').width(); //includes scroll bar width
511 var viewWidth = $('#BRcontainer').attr('scrollWidth');
514 for (i=0; i<indicesToDisplay.length; i++) {
515 var index = indicesToDisplay[i];
516 var height = parseInt(this._getPageHeight(index)/this.reduce);
518 if(-1 == jQuery.inArray(indicesToDisplay[i], this.displayedIndices)) {
519 var width = parseInt(this._getPageWidth(index)/this.reduce);
520 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
521 var div = document.createElement("div");
522 div.className = 'BRpagediv1up';
523 div.id = 'pagediv'+index;
524 div.style.position = "absolute";
525 $(div).css('top', leafTop + 'px');
526 var left = (viewWidth-width)>>1;
527 if (left<0) left = 0;
528 $(div).css('left', left+'px');
529 $(div).css('width', width+'px');
530 $(div).css('height', height+'px');
531 //$(div).text('loading...');
533 this.setDragHandler(div);
535 $('#BRpageview').append(div);
537 var img = document.createElement("img");
538 img.src = this._getPageURI(index, this.reduce, 0);
539 $(img).css('width', width+'px');
540 $(img).css('height', height+'px');
544 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
547 leafTop += height +10;
551 for (i=0; i<this.displayedIndices.length; i++) {
552 if (-1 == jQuery.inArray(this.displayedIndices[i], indicesToDisplay)) {
553 var index = this.displayedIndices[i];
554 //console.log('Removing leaf ' + index);
555 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
556 $('#pagediv'+index).remove();
558 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
562 this.displayedIndices = indicesToDisplay.slice();
563 this.updateSearchHilites();
565 if (null != this.getPageNum(firstIndexToDraw)) {
566 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
568 $("#BRpagenum").val('');
571 this.updateToolbarZoom(this.reduce);
575 // drawLeafsThumbnail()
576 //______________________________________________________________________________
577 BookReader.prototype.drawLeafsThumbnail = function() {
578 //alert('drawing leafs!');
581 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
583 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
597 // Calculate the position of every thumbnail. $$$ cache instead of calculating on every draw
598 for (i=0; i<this.numLeafs; i++) {
599 leafWidth = this.thumbWidth;
600 if (rightPos + (leafWidth + this.padding) > viewWidth){
606 if (leafMap[currentRow]===undefined) { leafMap[currentRow] = {}; }
607 if (leafMap[currentRow].leafs===undefined) {
608 leafMap[currentRow].leafs = [];
609 leafMap[currentRow].height = 0;
610 leafMap[currentRow].top = 0;
612 leafMap[currentRow].leafs[leafIndex] = {};
613 leafMap[currentRow].leafs[leafIndex].num = i;
614 leafMap[currentRow].leafs[leafIndex].left = rightPos;
616 leafHeight = parseInt((this.getPageHeight(leafMap[currentRow].leafs[leafIndex].num)*this.thumbWidth)/this.getPageWidth(leafMap[currentRow].leafs[leafIndex].num), 10);
617 if (leafHeight > leafMap[currentRow].height) {
618 leafMap[currentRow].height = leafHeight;
620 if (leafIndex===0) { bottomPos += this.padding + leafMap[currentRow].height; }
621 rightPos += leafWidth + this.padding;
622 if (rightPos > maxRight) { maxRight = rightPos; }
626 // reset the bottom position based on thumbnails
627 $('#BRpageview').height(bottomPos);
629 var pageViewBuffer = Math.floor(($('#BRcontainer').attr('scrollWidth') - maxRight) / 2) - 14;
630 var scrollTop = $('#BRcontainer').attr('scrollTop');
631 var scrollBottom = scrollTop + $('#BRcontainer').height();
635 var rowsToDisplay = [];
637 // Determine the thumbnails in view
638 for (i=0; i<leafMap.length; i++) {
639 leafBottom += this.padding + leafMap[i].height;
640 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
641 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
642 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
643 if (topInView | bottomInView | middleInView) {
644 //console.log('row to display: ' + j);
645 rowsToDisplay.push(i);
647 if(leafTop > leafMap[i].top) { leafMap[i].top = leafTop; }
648 leafTop = leafBottom;
651 // create a buffer of preloaded rows before and after the visible rows
652 var firstRow = rowsToDisplay[0];
653 var lastRow = rowsToDisplay[rowsToDisplay.length-1];
654 for (i=1; i<this.thumbRowBuffer+1; i++) {
655 if (lastRow+i < leafMap.length) { rowsToDisplay.push(lastRow+i); }
657 for (i=1; i<this.thumbRowBuffer+1; i++) {
658 if (firstRow-i >= 0) { rowsToDisplay.push(firstRow-i); }
661 // Update hash, but only if we're currently displaying a leaf
662 // Hack that fixes #365790
663 if (this.displayedRows.length > 0) {
664 this.updateLocationHash();
667 // Create the thumbnail divs and images (lazy loaded)
676 for (i=0; i<rowsToDisplay.length; i++) {
677 if (-1 == jQuery.inArray(rowsToDisplay[i], this.displayedRows)) {
678 row = rowsToDisplay[i];
680 for (j=0; j<leafMap[row].leafs.length; j++) {
682 leaf = leafMap[row].leafs[j].num;
684 leafWidth = this.thumbWidth;
685 leafHeight = parseInt((this.getPageHeight(leaf)*this.thumbWidth)/this.getPageWidth(leaf), 10);
686 leafTop = leafMap[row].top;
687 left = leafMap[row].leafs[index].left + pageViewBuffer;
688 if ('rl' == this.pageProgression){
689 left = viewWidth - leafWidth - left;
692 div = document.createElement("div");
693 div.id = 'pagediv'+leaf;
694 div.style.position = "absolute";
695 div.className = "BRpagedivthumb";
697 left += this.padding;
698 $(div).css('top', leafTop + 'px');
699 $(div).css('left', left+'px');
700 $(div).css('width', leafWidth+'px');
701 $(div).css('height', leafHeight+'px');
702 //$(div).text('loading...');
704 // link to page in single page mode
705 link = document.createElement("a");
706 $(link).data('leaf', leaf);
707 $(link).bind('click', function(event) {
708 self.firstIndex = $(this).data('leaf');
709 self.switchMode(self.constMode1up);
710 event.preventDefault();
713 // $$$ we don't actually go to this URL (click is handled in handler above)
714 link.href = '#page/' + (this.getPageNum(leaf)) +'/mode/1up' ;
717 $('#BRpageview').append(div);
719 img = document.createElement("img");
720 var thumbReduce = Math.floor(this.getPageWidth(leaf) / this.thumbWidth);
722 $(img).attr('src', this.imagesBaseURL + 'transparent.png')
723 .css({'width': leafWidth+'px', 'height': leafHeight+'px' })
724 .addClass('BRlazyload')
725 // Store the URL of the image that will replace this one
726 .data('srcURL', this._getPageURI(leaf, thumbReduce));
728 //console.log('displaying thumbnail: ' + leaf);
733 // remove previous highlights
734 $('.BRpagedivthumb_highlight').removeClass('BRpagedivthumb_highlight');
736 // highlight current page
737 $('#pagediv'+this.currentIndex()).addClass('BRpagedivthumb_highlight');
739 // Remove thumbnails that are not to be displayed
741 for (i=0; i<this.displayedRows.length; i++) {
742 if (-1 == jQuery.inArray(this.displayedRows[i], rowsToDisplay)) {
743 row = this.displayedRows[i];
745 // $$$ Safari doesn't like the comprehension
746 //var rowLeafs = [leaf.num for each (leaf in leafMap[row].leafs)];
747 //console.log('Removing row ' + row + ' ' + rowLeafs);
749 for (k=0; k<leafMap[row].leafs.length; k++) {
750 index = leafMap[row].leafs[k].num;
751 //console.log('Removing leaf ' + index);
752 $('#pagediv'+index).remove();
756 var mRow = this.displayedRows[i];
757 var mLeafs = '[' + [leaf.num for each (leaf in leafMap[mRow].leafs)] + ']';
758 console.log('NOT Removing row ' + mRow + ' ' + mLeafs);
763 this.displayedRows = rowsToDisplay.slice();
765 this.lazyLoadThumbnails();
767 // Update page number box. $$$ refactor to function
768 if (null !== this.getPageNum(this.currentIndex())) {
769 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
771 $("#BRpagenum").val('');
774 this.updateToolbarZoom(this.reduce);
777 BookReader.prototype.lazyLoadThumbnails = function() {
779 // console.log('lazy load');
781 // We check the complete property since load may not be fired if loading from the cache
782 $('.BRlazyloading').filter('[complete=true]').removeClass('BRlazyloading');
784 var loading = $('.BRlazyloading').length;
785 var toLoad = this.thumbMaxLoading - loading;
787 // console.log(' ' + loading + ' thumbnails loading');
788 // console.log(' this.thumbMaxLoading ' + this.thumbMaxLoading);
793 // $$$ TODO load those near top (but not beyond) page view first
794 $('#BRpageview img.BRlazyload').filter(':lt(' + toLoad + ')').each( function() {
795 self.lazyLoadImage(this);
800 BookReader.prototype.lazyLoadImage = function (dummyImage) {
801 //console.log(' lazy load started for ' + $(dummyImage).data('srcURL').match('([0-9]{4}).jp2')[1] );
803 var img = new Image();
807 .addClass('BRlazyloading')
808 .one('load', function() {
809 //if (console) { console.log(' onload ' + $(this).attr('src').match('([0-9]{4}).jp2')[1]); };
811 $(this).removeClass('BRlazyloading');
813 // $$$ Calling lazyLoadThumbnails here was causing stack overflow on IE so
814 // we call the function after a slight delay. Also the img.complete property
815 // is not yet set in IE8 inside this onload handler
816 setTimeout(function() { self.lazyLoadThumbnails(); }, 100);
818 .one('error', function() {
819 // Remove class so we no longer count as loading
820 $(this).removeClass('BRlazyloading');
822 .attr( { width: $(dummyImage).width(),
823 height: $(dummyImage).height(),
824 src: $(dummyImage).data('srcURL')
827 // replace with the new img
828 $(dummyImage).before(img).remove();
830 img = null; // tidy up closure
834 // drawLeafsTwoPage()
835 //______________________________________________________________________________
836 BookReader.prototype.drawLeafsTwoPage = function() {
837 var scrollTop = $('#BRtwopageview').attr('scrollTop');
838 var scrollBottom = scrollTop + $('#BRtwopageview').height();
840 // $$$ we should use calculated values in this.twoPage (recalc if necessary)
842 var indexL = this.twoPage.currentIndexL;
844 var heightL = this._getPageHeight(indexL);
845 var widthL = this._getPageWidth(indexL);
847 var leafEdgeWidthL = this.leafEdgeWidth(indexL);
848 var leafEdgeWidthR = this.twoPage.edgeWidth - leafEdgeWidthL;
849 //var bookCoverDivWidth = this.twoPage.width*2 + 20 + this.twoPage.edgeWidth; // $$$ hardcoded cover width
850 var bookCoverDivWidth = this.twoPage.bookCoverDivWidth;
851 //console.log(leafEdgeWidthL);
853 var middle = this.twoPage.middle; // $$$ getter instead?
854 var top = this.twoPageTop();
855 var bookCoverDivLeft = this.twoPage.bookCoverDivLeft;
857 this.twoPage.scaledWL = this.getPageWidth2UP(indexL);
858 this.twoPage.gutter = this.twoPageGutter();
860 this.prefetchImg(indexL);
861 $(this.prefetchedImgs[indexL]).css({
862 position: 'absolute',
863 left: this.twoPage.gutter-this.twoPage.scaledWL+'px',
866 backgroundColor: this.getPageBackgroundColor(indexL),
867 height: this.twoPage.height +'px', // $$$ height forced the same for both pages
868 width: this.twoPage.scaledWL + 'px',
869 borderRight: '1px solid black',
871 }).appendTo('#BRtwopageview');
873 var indexR = this.twoPage.currentIndexR;
874 var heightR = this._getPageHeight(indexR);
875 var widthR = this._getPageWidth(indexR);
877 // $$$ should use getwidth2up?
878 //var scaledWR = this.twoPage.height*widthR/heightR;
879 this.twoPage.scaledWR = this.getPageWidth2UP(indexR);
880 this.prefetchImg(indexR);
881 $(this.prefetchedImgs[indexR]).css({
882 position: 'absolute',
883 left: this.twoPage.gutter+'px',
886 backgroundColor: this.getPageBackgroundColor(indexR),
887 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
888 width: this.twoPage.scaledWR + 'px',
889 borderLeft: '1px solid black',
891 }).appendTo('#BRtwopageview');
894 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
895 this.setMouseHandlers2UP();
896 this.twoPageSetCursor();
898 this.updatePageNumBox2UP();
899 this.updateToolbarZoom(this.reduce);
901 // this.twoPagePlaceFlipAreas(); // No longer used
905 // updatePageNumBox2UP
906 //______________________________________________________________________________
907 BookReader.prototype.updatePageNumBox2UP = function() {
908 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
909 $("#BRpagenum").val(this.getPageNum(this.currentIndex()));
911 $("#BRpagenum").val('');
913 this.updateLocationHash();
917 //______________________________________________________________________________
918 BookReader.prototype.loadLeafs = function() {
922 if (null == this.timer) {
923 this.timer=setTimeout(function(){self.drawLeafs()},250);
925 clearTimeout(this.timer);
926 this.timer=setTimeout(function(){self.drawLeafs()},250);
932 // Pass 1 to zoom in, anything else to zoom out
933 //______________________________________________________________________________
934 BookReader.prototype.zoom = function(direction) {
936 case this.constMode1up:
937 return this.zoom1up(direction);
938 case this.constMode2up:
939 return this.zoom2up(direction);
940 case this.constModeThumb:
941 return this.zoomThumb(direction);
946 //______________________________________________________________________________
947 BookReader.prototype.zoom1up = function(dir) {
949 if (2 == this.mode) { //can only zoom in 1-page mode
954 // $$$ with flexible zoom we could "snap" to /2 page reductions
955 // for better scaling
957 if (this.reduce <= 0.5) return;
958 this.reduce*=0.5; //zoom in
960 if (this.reduce >= 8) return;
961 this.reduce*=2; //zoom out
964 this.pageScale = this.reduce; // preserve current reduce
965 this.resizePageView();
967 $('#BRpageview').empty()
968 this.displayedIndices = [];
971 this.updateToolbarZoom(this.reduce);
973 // Recalculate search hilites
974 this.removeSearchHilites();
975 this.updateSearchHilites();
980 //______________________________________________________________________________
981 BookReader.prototype.resizePageView = function() {
983 // $$$ This code assumes 1up mode
984 // e.g. does not preserve position in thumbnail mode
985 // See http://bugs.launchpad.net/bookreader/+bug/552972
989 //var viewWidth = $('#BRcontainer').width(); //includes scrollBar
990 var viewWidth = $('#BRcontainer').attr('clientWidth');
992 var oldScrollTop = $('#BRcontainer').attr('scrollTop');
993 var oldScrollLeft = $('#BRcontainer').attr('scrollLeft');
994 var oldPageViewHeight = $('#BRpageview').height();
995 var oldPageViewWidth = $('#BRpageview').width();
997 var oldCenterY = this.centerY1up();
998 var oldCenterX = this.centerX1up();
1000 if (0 != oldPageViewHeight) {
1001 var scrollRatio = oldCenterY / oldPageViewHeight;
1003 var scrollRatio = 0;
1006 for (i=0; i<this.numLeafs; i++) {
1007 viewHeight += parseInt(this._getPageHeight(i)/this.reduce) + this.padding;
1008 var width = parseInt(this._getPageWidth(i)/this.reduce);
1009 if (width>viewWidth) viewWidth=width;
1011 $('#BRpageview').height(viewHeight);
1012 $('#BRpageview').width(viewWidth);
1014 var newCenterY = scrollRatio*viewHeight;
1015 var newTop = Math.max(0, Math.floor( newCenterY - $('#BRcontainer').height()/2 ));
1016 $('#BRcontainer').attr('scrollTop', newTop);
1018 // We use clientWidth here to avoid miscalculating due to scroll bar
1019 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
1020 var newLeft = newCenterX - $('#BRcontainer').attr('clientWidth') / 2;
1021 newLeft = Math.max(newLeft, 0);
1022 $('#BRcontainer').attr('scrollLeft', newLeft);
1023 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
1025 //this.centerPageView();
1028 // $$$ jump to index here? index is not preserved when resizing in thumb mode
1030 // Not really needed until there is 1up autofit
1031 this.removeSearchHilites();
1032 this.updateSearchHilites();
1036 //______________________________________________________________________________
1037 // Returns the current offset of the viewport center in scaled document coordinates.
1038 BookReader.prototype.centerX1up = function() {
1040 if ($('#BRpageview').width() < $('#BRcontainer').attr('clientWidth')) { // fully shown
1041 centerX = $('#BRpageview').width();
1043 centerX = $('#BRcontainer').attr('scrollLeft') + $('#BRcontainer').attr('clientWidth') / 2;
1045 centerX = Math.floor(centerX);
1050 //______________________________________________________________________________
1051 // Returns the current offset of the viewport center in scaled document coordinates.
1052 BookReader.prototype.centerY1up = function() {
1053 var centerY = $('#BRcontainer').attr('scrollTop') + $('#BRcontainer').height() / 2;
1054 return Math.floor(centerY);
1058 //______________________________________________________________________________
1059 BookReader.prototype.centerPageView = function() {
1061 var scrollWidth = $('#BRcontainer').attr('scrollWidth');
1062 var clientWidth = $('#BRcontainer').attr('clientWidth');
1063 //console.log('sW='+scrollWidth+' cW='+clientWidth);
1064 if (scrollWidth > clientWidth) {
1065 $('#BRcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
1070 // zoom2up(direction)
1071 //______________________________________________________________________________
1072 BookReader.prototype.zoom2up = function(direction) {
1074 // Hard stop autoplay
1075 this.stopFlipAnimations();
1077 // Get new zoom state
1078 var newZoom = this.twoPageNextReduce(this.reduce, direction);
1079 if ((this.reduce == newZoom.reduce) && (this.twoPage.autofit == newZoom.autofit)) {
1082 this.twoPage.autofit = newZoom.autofit;
1083 this.reduce = newZoom.reduce;
1084 this.pageScale = this.reduce; // preserve current reduce
1086 // Preserve view center position
1087 var oldCenter = this.twoPageGetViewCenter();
1089 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
1090 // $$$ An improvement would be to use the low res image until the larger one is loaded.
1091 if (1 == direction) {
1092 for (var img in this.prefetchedImgs) {
1093 delete this.prefetchedImgs[img];
1097 // Prepare view with new center to minimize visual glitches
1098 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
1101 BookReader.prototype.zoomThumb = function(direction) {
1102 var oldColumns = this.thumbColumns;
1103 switch (direction) {
1105 this.thumbColumns += 1;
1108 this.thumbColumns -= 1;
1113 if (this.thumbColumns < 2) {
1114 this.thumbColumns = 2;
1115 } else if (this.thumbColumns > 8) {
1116 this.thumbColumns = 8;
1119 if (this.thumbColumns != oldColumns) {
1120 this.prepareThumbnailView();
1121 this.jumpToIndex(this.currentIndex());
1125 // Returns the width per thumbnail to display the requested number of columns
1126 // Note: #BRpageview must already exist since its width is used to calculate the
1128 BookReader.prototype.getThumbnailWidth = function(thumbnailColumns) {
1129 var padding = (thumbnailColumns + 1) * this.padding;
1130 var width = ($('#BRpageview').width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides
1131 return parseInt(width);
1134 // quantizeReduce(reduce)
1135 //______________________________________________________________________________
1136 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
1137 BookReader.prototype.quantizeReduce = function(reduce) {
1138 var quantized = this.reductionFactors[0];
1139 var distance = Math.abs(reduce - quantized);
1140 for (var i = 1; i < this.reductionFactors.length; i++) {
1141 newDistance = Math.abs(reduce - this.reductionFactors[i]);
1142 if (newDistance < distance) {
1143 distance = newDistance;
1144 quantized = this.reductionFactors[i];
1151 // twoPageNextReduce()
1152 //______________________________________________________________________________
1153 // Returns the next reduction level
1154 BookReader.prototype.twoPageNextReduce = function(reduce, direction) {
1156 var autofitReduce = this.twoPageGetAutofitReduce();
1158 if (0 == direction) { // autofit
1159 result.autofit = true;
1160 result.reduce = autofitReduce;
1162 } else if (1 == direction) { // zoom in
1163 var newReduce = this.reductionFactors[0];
1165 for (var i = 1; i < this.reductionFactors.length; i++) {
1166 if (this.reductionFactors[i] < reduce) {
1167 newReduce = this.reductionFactors[i];
1171 if (!this.twoPage.autofit && (autofitReduce < reduce && autofitReduce > newReduce)) {
1173 result.autofit = true;
1174 result.reduce = autofitReduce;
1176 result.autofit = false;
1177 result.reduce = newReduce;
1180 } else { // zoom out
1181 var lastIndex = this.reductionFactors.length - 1;
1182 var newReduce = this.reductionFactors[lastIndex];
1184 for (var i = lastIndex; i >= 0; i--) {
1185 if (this.reductionFactors[i] > reduce) {
1186 newReduce = this.reductionFactors[i];
1190 if (!this.twoPage.autofit && (autofitReduce > reduce && autofitReduce < newReduce)) {
1192 result.autofit = true;
1193 result.reduce = autofitReduce;
1195 result.autofit = false;
1196 result.reduce = newReduce;
1204 //______________________________________________________________________________
1205 // Attempts to jump to page. Returns true if page could be found, false otherwise.
1206 BookReader.prototype.jumpToPage = function(pageNum) {
1208 var pageIndex = this.getPageIndex(pageNum);
1210 if ('undefined' != typeof(pageIndex)) {
1213 this.jumpToIndex(pageIndex);
1214 $('#BRcontainer').attr('scrollTop', leafTop);
1223 //______________________________________________________________________________
1224 BookReader.prototype.jumpToIndex = function(index, pageX, pageY) {
1226 if (2 == this.mode) {
1229 // By checking against min/max we do nothing if requested index
1231 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1232 this.flipBackToIndex(index);
1233 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1234 this.flipFwdToIndex(index);
1237 } else if (3 == this.mode) {
1238 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
1248 for (i=0; i<(index+1); i++) {
1249 leafWidth = this.thumbWidth;
1250 if (rightPos + (leafWidth + this.padding) > viewWidth){
1255 leafHeight = parseInt((this.getPageHeight(leaf)*this.thumbWidth)/this.getPageWidth(leaf), 10);
1256 if(leafHeight > rowHeight) { rowHeight = leafHeight; }
1257 if (leafIndex==0) { leafTop = bottomPos; }
1258 if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
1259 rightPos += leafWidth + this.padding;
1262 this.firstIndex=index;
1263 if ($('#BRcontainer').attr('scrollTop') == leafTop) {
1266 $('#BRcontainer').animate({scrollTop: leafTop },'fast');
1273 for (i=0; i<index; i++) {
1274 h = parseInt(this._getPageHeight(i)/this.reduce);
1275 leafTop += h + this.padding;
1279 //console.log('pageY ' + pageY);
1280 var offset = parseInt( (pageY) / this.reduce);
1281 offset -= $('#BRcontainer').attr('clientHeight') >> 1;
1282 //console.log( 'jumping to ' + leafTop + ' ' + offset);
1287 var offset = parseInt( (pageX) / this.reduce);
1288 offset -= $('#BRcontainer').attr('clientWidth') >> 1;
1292 //$('#BRcontainer').attr('scrollTop', leafTop);
1293 $('#BRcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
1299 //______________________________________________________________________________
1300 BookReader.prototype.switchMode = function(mode) {
1302 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
1304 if (mode == this.mode) {
1308 if (!this.canSwitchToMode(mode)) {
1313 this.removeSearchHilites();
1316 this.switchToolbarMode(mode);
1318 // reinstate scale if moving from thumbnail view
1319 if (this.pageScale != this.reduce) {
1320 this.reduce = this.pageScale;
1323 // $$$ TODO preserve center of view when switching between mode
1324 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
1327 this.reduce = this.quantizeReduce(this.reduce);
1328 this.prepareOnePageView();
1329 } else if (3 == mode) {
1330 this.reduce = this.quantizeReduce(this.reduce);
1331 this.prepareThumbnailView();
1332 this.jumpToIndex(this.currentIndex());
1334 // $$$ why don't we save autofit?
1335 this.twoPage.autofit = false; // Take zoom level from other mode
1336 this.reduce = this.quantizeReduce(this.reduce);
1337 this.prepareTwoPageView();
1338 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
1343 //prepareOnePageView()
1344 //______________________________________________________________________________
1345 BookReader.prototype.prepareOnePageView = function() {
1347 // var startLeaf = this.displayedIndices[0];
1348 var startLeaf = this.currentIndex();
1350 $('#BRcontainer').empty();
1351 $('#BRcontainer').css({
1352 overflowY: 'scroll',
1356 $("#BRcontainer").append("<div id='BRpageview'></div>");
1357 // $$$ keep select enabled for now since disabling it breaks keyboard
1358 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1359 // BookReader.util.disableSelect($('#BRpageview'));
1361 this.resizePageView();
1363 this.jumpToIndex(startLeaf);
1364 this.displayedIndices = [];
1366 this.drawLeafsOnePage();
1369 //prepareThumbnailView()
1370 //______________________________________________________________________________
1371 BookReader.prototype.prepareThumbnailView = function() {
1373 $('#BRcontainer').empty();
1374 $('#BRcontainer').css({
1375 overflowY: 'scroll',
1379 $("#BRcontainer").append("<div id='BRpageview'></div>");
1381 // $$$ keep select enabled for now since disabling it breaks keyboard
1382 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1383 // BookReader.util.disableSelect($('#BRpageview'));
1385 var startLeaf = this.currentIndex();
1386 this.thumbWidth = this.getThumbnailWidth(this.thumbColumns);
1387 this.reduce = this.getPageWidth(0)/this.thumbWidth;
1389 this.resizePageView();
1391 this.displayedRows = [];
1393 // $$$ resizePageView will do a delayed load -- this will make it happen faster
1394 this.drawLeafsThumbnail();
1397 // prepareTwoPageView()
1398 //______________________________________________________________________________
1399 // Some decisions about two page view:
1401 // Both pages will be displayed at the same height, even if they were different physical/scanned
1402 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
1403 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
1404 // aspect ratio to determine the height.
1406 // The two page view div is resized to keep the middle of the book in the middle of the div
1407 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the BRcontent
1408 // div requires adjusting the offset of BRtwpageview and/or scrolling in BRcontent.
1409 BookReader.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
1410 $('#BRcontainer').empty();
1411 $('#BRcontainer').css('overflow', 'auto');
1413 // We want to display two facing pages. We may be missing
1414 // one side of the spread because it is the first/last leaf,
1415 // foldouts, missing pages, etc
1417 //var targetLeaf = this.displayedIndices[0];
1418 var targetLeaf = this.firstIndex;
1420 if (targetLeaf < this.firstDisplayableIndex()) {
1421 targetLeaf = this.firstDisplayableIndex();
1424 if (targetLeaf > this.lastDisplayableIndex()) {
1425 targetLeaf = this.lastDisplayableIndex();
1428 //this.twoPage.currentIndexL = null;
1429 //this.twoPage.currentIndexR = null;
1430 //this.pruneUnusedImgs();
1432 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1433 this.twoPage.currentIndexL = currentSpreadIndices[0];
1434 this.twoPage.currentIndexR = currentSpreadIndices[1];
1435 this.firstIndex = this.twoPage.currentIndexL;
1437 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1439 this.pruneUnusedImgs();
1440 this.prefetch(); // Preload images or reload if scaling has changed
1442 //console.dir(this.twoPage);
1444 // Add the two page view
1445 // $$$ Can we get everything set up and then append?
1446 $('#BRcontainer').append('<div id="BRtwopageview"></div>');
1448 // $$$ calculate first then set
1449 $('#BRtwopageview').css( {
1450 height: this.twoPage.totalHeight + 'px',
1451 width: this.twoPage.totalWidth + 'px',
1452 position: 'absolute'
1455 // If there will not be scrollbars (e.g. when zooming out) we center the book
1456 // since otherwise the book will be stuck off-center
1457 if (this.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
1458 centerPercentageX = 0.5;
1460 if (this.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
1461 centerPercentageY = 0.5;
1464 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1466 this.twoPage.coverDiv = document.createElement('div');
1467 $(this.twoPage.coverDiv).attr('id', 'BRbookcover').css({
1468 border: '1px solid rgb(68, 25, 17)',
1469 width: this.twoPage.bookCoverDivWidth + 'px',
1470 height: this.twoPage.bookCoverDivHeight+'px',
1471 visibility: 'visible',
1472 position: 'absolute',
1473 backgroundColor: '#663929',
1474 left: this.twoPage.bookCoverDivLeft + 'px',
1475 top: this.twoPage.bookCoverDivTop+'px',
1476 MozBorderRadiusTopleft: '7px',
1477 MozBorderRadiusTopright: '7px',
1478 MozBorderRadiusBottomright: '7px',
1479 MozBorderRadiusBottomleft: '7px'
1480 }).appendTo('#BRtwopageview');
1482 this.leafEdgeR = document.createElement('div');
1483 this.leafEdgeR.className = 'leafEdgeR'; // $$$ the static CSS should be moved into the .css file
1484 $(this.leafEdgeR).css({
1485 borderStyle: 'solid solid solid none',
1486 borderColor: 'rgb(51, 51, 34)',
1487 borderWidth: '1px 1px 1px 0px',
1488 background: 'transparent url(' + this.imagesBaseURL + 'right_edges.png) repeat scroll 0% 0%',
1489 width: this.twoPage.leafEdgeWidthR + 'px',
1490 height: this.twoPage.height-1 + 'px',
1492 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1493 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1494 position: 'absolute'
1495 }).appendTo('#BRtwopageview');
1497 this.leafEdgeL = document.createElement('div');
1498 this.leafEdgeL.className = 'leafEdgeL';
1499 $(this.leafEdgeL).css({ // $$$ static CSS should be moved to file
1500 borderStyle: 'solid none solid solid',
1501 borderColor: 'rgb(51, 51, 34)',
1502 borderWidth: '1px 0px 1px 1px',
1503 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1504 width: this.twoPage.leafEdgeWidthL + 'px',
1505 height: this.twoPage.height-1 + 'px',
1506 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1507 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1508 position: 'absolute'
1509 }).appendTo('#BRtwopageview');
1511 div = document.createElement('div');
1512 $(div).attr('id', 'BRbookspine').css({
1513 border: '1px solid rgb(68, 25, 17)',
1514 width: this.twoPage.bookSpineDivWidth+'px',
1515 height: this.twoPage.bookSpineDivHeight+'px',
1516 position: 'absolute',
1517 backgroundColor: 'rgb(68, 25, 17)',
1518 left: this.twoPage.bookSpineDivLeft+'px',
1519 top: this.twoPage.bookSpineDivTop+'px'
1520 }).appendTo('#BRtwopageview');
1522 var self = this; // for closure
1524 /* Flip areas no longer used
1525 this.twoPage.leftFlipArea = document.createElement('div');
1526 this.twoPage.leftFlipArea.className = 'BRfliparea';
1527 $(this.twoPage.leftFlipArea).attr('id', 'BRleftflip').css({
1529 width: this.twoPageFlipAreaWidth() + 'px',
1530 height: this.twoPageFlipAreaHeight() + 'px',
1531 position: 'absolute',
1532 left: this.twoPageLeftFlipAreaLeft() + 'px',
1533 top: this.twoPageFlipAreaTop() + 'px',
1536 }).bind('click', function(e) {
1538 }).bind('mousedown', function(e) {
1540 }).appendTo('#BRtwopageview');
1542 this.twoPage.rightFlipArea = document.createElement('div');
1543 this.twoPage.rightFlipArea.className = 'BRfliparea';
1544 $(this.twoPage.rightFlipArea).attr('id', 'BRrightflip').css({
1546 width: this.twoPageFlipAreaWidth() + 'px',
1547 height: this.twoPageFlipAreaHeight() + 'px',
1548 position: 'absolute',
1549 left: this.twoPageRightFlipAreaLeft() + 'px',
1550 top: this.twoPageFlipAreaTop() + 'px',
1553 }).bind('click', function(e) {
1555 }).bind('mousedown', function(e) {
1557 }).appendTo('#BRtwopageview');
1560 this.prepareTwoPagePopUp();
1562 this.displayedIndices = [];
1564 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1565 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1567 this.drawLeafsTwoPage();
1568 this.updateToolbarZoom(this.reduce);
1572 this.removeSearchHilites();
1573 this.updateSearchHilites();
1577 // prepareTwoPagePopUp()
1579 // This function prepares the "View Page n" popup that shows while the mouse is
1580 // over the left/right "stack of sheets" edges. It also binds the mouse
1581 // events for these divs.
1582 //______________________________________________________________________________
1583 BookReader.prototype.prepareTwoPagePopUp = function() {
1585 this.twoPagePopUp = document.createElement('div');
1586 $(this.twoPagePopUp).css({
1587 border: '1px solid black',
1589 position: 'absolute',
1590 fontFamily: 'sans-serif',
1593 backgroundColor: 'rgb(255, 255, 238)',
1595 }).appendTo('#BRcontainer');
1596 $(this.twoPagePopUp).hide();
1598 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1599 $(e.data.twoPagePopUp).show();
1602 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1603 $(e.data.twoPagePopUp).hide();
1606 $(this.leafEdgeL).bind('click', this, function(e) {
1608 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1609 e.data.jumpToIndex(jumpIndex);
1612 $(this.leafEdgeR).bind('click', this, function(e) {
1614 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1615 e.data.jumpToIndex(jumpIndex);
1618 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1620 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1621 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1623 // $$$ TODO: Make sure popup is positioned so that it is in view
1624 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1625 $(e.data.twoPagePopUp).css({
1626 left: e.pageX- $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() + 20 + 'px',
1627 top: e.pageY - $('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1631 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1633 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1634 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1636 // $$$ TODO: Make sure popup is positioned so that it is in view
1637 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1638 $(e.data.twoPagePopUp).css({
1639 left: e.pageX - $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1640 top: e.pageY-$('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1645 // calculateSpreadSize()
1646 //______________________________________________________________________________
1647 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1648 // this.twoPage.currentIndexR
1649 // This function sets this.twoPage.height, twoPage.width
1651 BookReader.prototype.calculateSpreadSize = function() {
1653 var firstIndex = this.twoPage.currentIndexL;
1654 var secondIndex = this.twoPage.currentIndexR;
1655 //console.log('first page is ' + firstIndex);
1657 // Calculate page sizes and total leaf width
1659 if ( this.twoPage.autofit) {
1660 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1662 // set based on reduction factor
1663 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1666 // Both pages together
1667 this.twoPage.height = spreadSize.height;
1668 this.twoPage.width = spreadSize.width;
1671 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1672 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1675 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1676 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1677 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1681 // The width of the book cover div. The combined width of both pages, twice the width
1682 // of the book cover internal padding (2*10) and the page edges
1683 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1684 // The height of the book cover div
1685 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1688 // We calculate the total width and height for the div so that we can make the book
1690 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1691 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1692 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1693 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1694 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1695 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1697 // We want to minimize the unused space in two-up mode (maximize the amount of page
1698 // shown). We give width to the leaf edges and these widths change (though the sum
1699 // of the two remains constant) as we flip through the book. With the book
1700 // cover centered and fixed in the BRcontainer div the page images will meet
1701 // at the "gutter" which is generally offset from the center.
1702 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1703 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1705 // The left edge of the book cover moves depending on the width of the pages
1706 // $$$ change to getter
1707 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1708 // The top edge of the book cover stays a fixed distance from the top
1709 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1712 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1713 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1714 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1717 this.reduce = spreadSize.reduce; // $$$ really set this here?
1720 BookReader.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1723 // We check which page is closest to a "normal" page and use that to set the height
1724 // for both pages. This means that foldouts and other odd size pages will be displayed
1725 // smaller than the nominal zoom amount.
1726 var canon5Dratio = 1.5;
1729 height: this._getPageHeight(firstIndex),
1730 width: this._getPageWidth(firstIndex)
1734 height: this._getPageHeight(secondIndex),
1735 width: this._getPageWidth(secondIndex)
1738 var firstIndexRatio = first.height / first.width;
1739 var secondIndexRatio = second.height / second.width;
1740 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1743 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1744 ratio = firstIndexRatio;
1745 //console.log('using firstIndexRatio ' + ratio);
1747 ratio = secondIndexRatio;
1748 //console.log('using secondIndexRatio ' + ratio);
1751 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1752 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1);
1753 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1755 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1756 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1758 ideal.width = ($('#BRcontainer').width() - widthOutsidePages) >> 1;
1759 ideal.width -= 10; // $$$ fudge factor
1760 ideal.height = $('#BRcontainer').height() - heightOutsidePages;
1761 ideal.height -= 20; // fudge factor
1762 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1764 if (ideal.height/ratio <= ideal.width) {
1766 ideal.width = parseInt(ideal.height/ratio);
1769 ideal.height = parseInt(ideal.width*ratio);
1772 // $$$ check this logic with large spreads
1773 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1778 // getSpreadSizeFromReduce()
1779 //______________________________________________________________________________
1780 // Returns the spread size calculated from the reduction factor for the given pages
1781 BookReader.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1782 var spreadSize = {};
1783 // $$$ Scale this based on reduce?
1784 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1785 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1786 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1788 // $$$ Possibly incorrect -- we should make height "dominant"
1789 var nativeWidth = this._getPageWidth(firstIndex) + this._getPageWidth(secondIndex);
1790 var nativeHeight = this._getPageHeight(firstIndex) + this._getPageHeight(secondIndex);
1791 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1792 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1793 spreadSize.reduce = reduce;
1798 // twoPageGetAutofitReduce()
1799 //______________________________________________________________________________
1800 // Returns the current ideal reduction factor
1801 BookReader.prototype.twoPageGetAutofitReduce = function() {
1802 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1803 return spreadSize.reduce;
1806 // twoPageSetCursor()
1807 //______________________________________________________________________________
1808 // Set the cursor for two page view
1809 BookReader.prototype.twoPageSetCursor = function() {
1810 // console.log('setting cursor');
1811 if ( ($('#BRtwopageview').width() > $('#BRcontainer').attr('clientWidth')) ||
1812 ($('#BRtwopageview').height() > $('#BRcontainer').attr('clientHeight')) ) {
1813 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1814 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1816 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1817 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1822 //______________________________________________________________________________
1823 // Returns the currently active index.
1824 BookReader.prototype.currentIndex = function() {
1825 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1826 if (this.mode == this.constMode1up || this.mode == this.constModeThumb) {
1827 return this.firstIndex; // $$$ TODO page in center of view would be better
1828 } else if (this.mode == this.constMode2up) {
1829 // Only allow indices that are actually present in book
1830 return BookReader.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
1832 throw 'currentIndex called for unimplemented mode ' + this.mode;
1837 //______________________________________________________________________________
1838 // Flip the right page over onto the left
1839 BookReader.prototype.right = function() {
1840 if ('rl' != this.pageProgression) {
1850 //______________________________________________________________________________
1851 // Flip to the rightmost page
1852 BookReader.prototype.rightmost = function() {
1853 if ('rl' != this.pageProgression) {
1861 //______________________________________________________________________________
1862 // Flip the left page over onto the right.
1863 BookReader.prototype.left = function() {
1864 if ('rl' != this.pageProgression) {
1874 //______________________________________________________________________________
1875 // Flip to the leftmost page
1876 BookReader.prototype.leftmost = function() {
1877 if ('rl' != this.pageProgression) {
1885 //______________________________________________________________________________
1886 BookReader.prototype.next = function() {
1887 if (2 == this.mode) {
1889 this.flipFwdToIndex(null);
1891 if (this.firstIndex < this.lastDisplayableIndex()) {
1892 this.jumpToIndex(this.firstIndex+1);
1898 //______________________________________________________________________________
1899 BookReader.prototype.prev = function() {
1900 if (2 == this.mode) {
1902 this.flipBackToIndex(null);
1904 if (this.firstIndex >= 1) {
1905 this.jumpToIndex(this.firstIndex-1);
1910 BookReader.prototype.first = function() {
1911 this.jumpToIndex(this.firstDisplayableIndex());
1914 BookReader.prototype.last = function() {
1915 this.jumpToIndex(this.lastDisplayableIndex());
1919 //______________________________________________________________________________
1920 // Scrolls down one screen view
1921 BookReader.prototype.scrollDown = function() {
1922 if ($.inArray(this.mode, [this.constMode2up, this.constModeThumb])) {
1923 $('#BRcontainer').animate(
1924 { scrollTop: '+=' + $('#BRcontainer').height() * 0.95 + 'px'},
1925 450, 'easeInOutQuint'
1934 //______________________________________________________________________________
1935 // Scrolls up one screen view
1936 BookReader.prototype.scrollUp = function() {
1937 if ($.inArray(this.mode, [this.constMode2up, this.constModeThumb])) {
1938 $('#BRcontainer').animate(
1939 { scrollTop: '-=' + $('#BRcontainer').height() * 0.95 + 'px'},
1940 450, 'easeInOutQuint'
1949 // flipBackToIndex()
1950 //______________________________________________________________________________
1951 // to flip back one spread, pass index=null
1952 BookReader.prototype.flipBackToIndex = function(index) {
1954 if (1 == this.mode) return;
1956 var leftIndex = this.twoPage.currentIndexL;
1958 if (this.animating) return;
1960 if (null != this.leafEdgeTmp) {
1961 alert('error: leafEdgeTmp should be null!');
1965 if (null == index) {
1966 index = leftIndex-2;
1968 //if (index<0) return;
1970 var previousIndices = this.getSpreadIndices(index);
1972 if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
1976 this.animating = true;
1978 if ('rl' != this.pageProgression) {
1979 // Assume LTR and we are going backward
1980 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1981 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
1983 // RTL and going backward
1984 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1985 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
1989 // flipLeftToRight()
1990 //______________________________________________________________________________
1991 // Flips the page on the left towards the page on the right
1992 BookReader.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
1994 var leftLeaf = this.twoPage.currentIndexL;
1996 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1997 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1998 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
2000 var currWidthL = this.getPageWidth2UP(leftLeaf);
2001 var newWidthL = this.getPageWidth2UP(newIndexL);
2002 var newWidthR = this.getPageWidth2UP(newIndexR);
2004 var top = this.twoPageTop();
2005 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
2007 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
2008 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
2010 //animation strategy:
2011 // 0. remove search highlight, if any.
2012 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
2013 // of the left leaf and where the user clicked in the leaf edge.
2014 // Note that if this function was triggered by left() and not a
2015 // mouse click, the width of leafEdgeTmp is very small (zero px).
2016 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
2017 // leftLeaf to width=0.
2018 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
2019 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
2020 // its new full width.
2021 // 4. After step 3 is finished, do the following:
2022 // - remove leafEdgeTmp from the dom.
2023 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
2024 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
2025 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
2026 // and width=newLeafEdgeWidthL.
2027 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
2028 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
2029 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
2030 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
2031 // - prefetch new adjacent leafs.
2032 // - set up click handlers for both new left and right leafs.
2033 // - redraw the search highlight.
2034 // - update the pagenum box and the url.
2037 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
2039 this.leafEdgeTmp = document.createElement('div');
2040 $(this.leafEdgeTmp).css({
2041 borderStyle: 'solid none solid solid',
2042 borderColor: 'rgb(51, 51, 34)',
2043 borderWidth: '1px 0px 1px 1px',
2044 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
2045 width: leafEdgeTmpW + 'px',
2046 height: this.twoPage.height-1 + 'px',
2047 left: leftEdgeTmpLeft + 'px',
2049 position: 'absolute',
2051 }).appendTo('#BRtwopageview');
2053 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
2054 $(this.leafEdgeL).css({
2055 width: newLeafEdgeWidthL+'px',
2056 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
2059 // Left gets the offset of the current left leaf from the document
2060 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
2061 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
2062 var right = $('#BRtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#BRtwopageview').offset().left-2+'px';
2064 // We change the left leaf to right positioning
2065 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
2066 $(this.prefetchedImgs[leftLeaf]).css({
2071 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
2072 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
2076 this.removeSearchHilites();
2078 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
2079 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
2081 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
2082 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
2084 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
2085 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
2086 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
2088 $(self.leafEdgeR).css({
2089 // Moves the right leaf edge
2090 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
2091 left: gutter+newWidthR+'px'
2094 $(self.leafEdgeL).css({
2095 // Moves and resizes the left leaf edge
2096 width: newLeafEdgeWidthL+'px',
2097 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2100 // Resizes the brown border div
2101 $(self.twoPage.coverDiv).css({
2102 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2103 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
2106 $(self.leafEdgeTmp).remove();
2107 self.leafEdgeTmp = null;
2109 // $$$ TODO refactor with opposite direction flip
2111 self.twoPage.currentIndexL = newIndexL;
2112 self.twoPage.currentIndexR = newIndexR;
2113 self.twoPage.scaledWL = newWidthL;
2114 self.twoPage.scaledWR = newWidthR;
2115 self.twoPage.gutter = gutter;
2117 self.firstIndex = self.twoPage.currentIndexL;
2118 self.displayedIndices = [newIndexL, newIndexR];
2119 self.pruneUnusedImgs();
2121 self.animating = false;
2123 self.updateSearchHilites2UP();
2124 self.updatePageNumBox2UP();
2126 // self.twoPagePlaceFlipAreas(); // No longer used
2127 self.setMouseHandlers2UP();
2128 self.twoPageSetCursor();
2130 if (self.animationFinishedCallback) {
2131 self.animationFinishedCallback();
2132 self.animationFinishedCallback = null;
2140 //______________________________________________________________________________
2141 // Whether we flip left or right is dependent on the page progression
2142 // to flip forward one spread, pass index=null
2143 BookReader.prototype.flipFwdToIndex = function(index) {
2145 if (this.animating) return;
2147 if (null != this.leafEdgeTmp) {
2148 alert('error: leafEdgeTmp should be null!');
2152 if (null == index) {
2153 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
2155 if (index > this.lastDisplayableIndex()) return;
2157 this.animating = true;
2159 var nextIndices = this.getSpreadIndices(index);
2161 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
2163 if ('rl' != this.pageProgression) {
2164 // We did not specify RTL
2165 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
2166 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
2169 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
2170 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
2174 // flipRightToLeft(nextL, nextR, gutter)
2175 // $$$ better not to have to pass gutter in
2176 //______________________________________________________________________________
2177 // Flip from left to right and show the nextL and nextR indices on those sides
2178 BookReader.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
2179 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2180 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
2181 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2182 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
2184 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
2186 var top = this.twoPageTop();
2187 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
2189 var middle = this.twoPage.middle;
2190 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
2192 this.leafEdgeTmp = document.createElement('div');
2193 $(this.leafEdgeTmp).css({
2194 borderStyle: 'solid none solid solid',
2195 borderColor: 'rgb(51, 51, 34)',
2196 borderWidth: '1px 0px 1px 1px',
2197 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
2198 width: leafEdgeTmpW + 'px',
2199 height: this.twoPage.height-1 + 'px',
2200 left: gutter+scaledW+'px',
2202 position: 'absolute',
2204 }).appendTo('#BRtwopageview');
2206 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
2207 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
2209 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
2210 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
2211 var newWidthL = this.getPageWidth2UP(newIndexL);
2212 var newWidthR = this.getPageWidth2UP(newIndexR);
2214 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
2216 var self = this; // closure-tastic!
2218 var speed = this.flipSpeed;
2220 this.removeSearchHilites();
2222 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
2223 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
2224 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
2225 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
2226 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
2228 $(self.leafEdgeL).css({
2229 width: newLeafEdgeWidthL+'px',
2230 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2233 // Resizes the book cover
2234 $(self.twoPage.coverDiv).css({
2235 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2236 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
2239 $(self.leafEdgeTmp).remove();
2240 self.leafEdgeTmp = null;
2242 self.twoPage.currentIndexL = newIndexL;
2243 self.twoPage.currentIndexR = newIndexR;
2244 self.twoPage.scaledWL = newWidthL;
2245 self.twoPage.scaledWR = newWidthR;
2246 self.twoPage.gutter = gutter;
2248 self.firstIndex = self.twoPage.currentIndexL;
2249 self.displayedIndices = [newIndexL, newIndexR];
2250 self.pruneUnusedImgs();
2252 self.animating = false;
2255 self.updateSearchHilites2UP();
2256 self.updatePageNumBox2UP();
2258 // self.twoPagePlaceFlipAreas(); // No longer used
2259 self.setMouseHandlers2UP();
2260 self.twoPageSetCursor();
2262 if (self.animationFinishedCallback) {
2263 self.animationFinishedCallback();
2264 self.animationFinishedCallback = null;
2270 // setMouseHandlers2UP
2271 //______________________________________________________________________________
2272 BookReader.prototype.setMouseHandlers2UP = function() {
2274 $(this.prefetchedImgs[this.twoPage.currentIndexL]).bind('dblclick', function() {
2279 $(this.prefetchedImgs[this.twoPage.currentIndexR]).bind('dblclick', function() {
2286 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL] );
2287 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
2294 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR] );
2295 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
2298 e.data.self.right();
2304 //______________________________________________________________________________
2305 BookReader.prototype.prefetchImg = function(index) {
2306 var pageURI = this._getPageURI(index);
2308 // Load image if not loaded or URI has changed (e.g. due to scaling)
2309 var loadImage = false;
2310 if (undefined == this.prefetchedImgs[index]) {
2311 //console.log('no image for ' + index);
2313 } else if (pageURI != this.prefetchedImgs[index].uri) {
2314 //console.log('uri changed for ' + index);
2319 //console.log('prefetching ' + index);
2320 var img = document.createElement("img");
2322 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
2323 this.prefetchedImgs[index] = img;
2328 // prepareFlipLeftToRight()
2330 //______________________________________________________________________________
2332 // Prepare to flip the left page towards the right. This corresponds to moving
2333 // backward when the page progression is left to right.
2334 BookReader.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
2336 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
2338 this.prefetchImg(prevL);
2339 this.prefetchImg(prevR);
2341 var height = this._getPageHeight(prevL);
2342 var width = this._getPageWidth(prevL);
2343 var middle = this.twoPage.middle;
2344 var top = this.twoPageTop();
2345 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
2347 // The gutter is the dividing line between the left and right pages.
2348 // It is offset from the middle to create the illusion of thickness to the pages
2349 var gutter = middle + this.gutterOffsetForIndex(prevL);
2351 //console.log(' gutter for ' + prevL + ' is ' + gutter);
2352 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
2353 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
2356 position: 'absolute',
2357 left: gutter-scaledW+'px',
2358 right: '', // clear right property
2360 height: this.twoPage.height,
2361 width: scaledW+'px',
2362 backgroundColor: this.getPageBackgroundColor(prevL),
2363 borderRight: '1px solid black',
2367 $(this.prefetchedImgs[prevL]).css(leftCSS);
2369 $('#BRtwopageview').append(this.prefetchedImgs[prevL]);
2371 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
2374 position: 'absolute',
2378 height: this.twoPage.height,
2380 backgroundColor: this.getPageBackgroundColor(prevR),
2381 borderLeft: '1px solid black',
2385 $(this.prefetchedImgs[prevR]).css(rightCSS);
2387 $('#BRtwopageview').append(this.prefetchedImgs[prevR]);
2391 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
2392 // prepareFlipRightToLeft()
2393 //______________________________________________________________________________
2394 BookReader.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
2396 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
2399 this.prefetchImg(nextL);
2400 this.prefetchImg(nextR);
2402 var height = this._getPageHeight(nextR);
2403 var width = this._getPageWidth(nextR);
2404 var middle = this.twoPage.middle;
2405 var top = this.twoPageTop();
2406 var scaledW = this.twoPage.height*width/height;
2408 var gutter = middle + this.gutterOffsetForIndex(nextL);
2410 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
2411 $(this.prefetchedImgs[nextR]).css({
2412 position: 'absolute',
2415 backgroundColor: this.getPageBackgroundColor(nextR),
2416 height: this.twoPage.height,
2417 width: scaledW+'px',
2418 borderLeft: '1px solid black',
2422 $('#BRtwopageview').append(this.prefetchedImgs[nextR]);
2424 height = this._getPageHeight(nextL);
2425 width = this._getPageWidth(nextL);
2426 scaledW = this.twoPage.height*width/height;
2428 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#BRcontainer').width()-gutter);
2429 $(this.prefetchedImgs[nextL]).css({
2430 position: 'absolute',
2431 right: $('#BRtwopageview').attr('clientWidth')-gutter+'px',
2433 backgroundColor: this.getPageBackgroundColor(nextL),
2434 height: this.twoPage.height,
2435 width: 0+'px', // Start at 0 width, then grow to the left
2436 borderRight: '1px solid black',
2440 $('#BRtwopageview').append(this.prefetchedImgs[nextL]);
2444 // getNextLeafs() -- NOT RTL AWARE
2445 //______________________________________________________________________________
2446 // BookReader.prototype.getNextLeafs = function(o) {
2447 // //TODO: we might have two left or two right leafs in a row (damaged book)
2448 // //For now, assume that leafs are contiguous.
2450 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2451 // o.L = this.twoPage.currentIndexL+2;
2452 // o.R = this.twoPage.currentIndexL+3;
2455 // getprevLeafs() -- NOT RTL AWARE
2456 //______________________________________________________________________________
2457 // BookReader.prototype.getPrevLeafs = function(o) {
2458 // //TODO: we might have two left or two right leafs in a row (damaged book)
2459 // //For now, assume that leafs are contiguous.
2461 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2462 // o.L = this.twoPage.currentIndexL-2;
2463 // o.R = this.twoPage.currentIndexL-1;
2466 // pruneUnusedImgs()
2467 //______________________________________________________________________________
2468 BookReader.prototype.pruneUnusedImgs = function() {
2469 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2470 for (var key in this.prefetchedImgs) {
2471 //console.log('key is ' + key);
2472 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2473 //console.log('removing key '+ key);
2474 $(this.prefetchedImgs[key]).remove();
2476 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2477 //console.log('deleting key '+ key);
2478 delete this.prefetchedImgs[key];
2484 //______________________________________________________________________________
2485 BookReader.prototype.prefetch = function() {
2487 // $$$ We should check here if the current indices have finished
2488 // loading (with some timeout) before loading more page images
2489 // See https://bugs.edge.launchpad.net/bookreader/+bug/511391
2491 // prefetch visible pages first
2492 this.prefetchImg(this.twoPage.currentIndexL);
2493 this.prefetchImg(this.twoPage.currentIndexR);
2495 var adjacentPagesToLoad = 3;
2497 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2498 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2500 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2501 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2503 // Load images spreading out from current
2504 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2505 var goingDown = lowCurrent - i;
2506 if (goingDown >= start) {
2507 this.prefetchImg(goingDown);
2509 var goingUp = highCurrent + i;
2510 if (goingUp <= end) {
2511 this.prefetchImg(goingUp);
2516 var lim = this.twoPage.currentIndexL-4;
2518 lim = Math.max(lim, 0);
2519 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2520 this.prefetchImg(i);
2523 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2524 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2525 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2526 this.prefetchImg(i);
2532 // getPageWidth2UP()
2533 //______________________________________________________________________________
2534 BookReader.prototype.getPageWidth2UP = function(index) {
2535 // We return the width based on the dominant height
2536 var height = this._getPageHeight(index);
2537 var width = this._getPageWidth(index);
2538 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2542 //______________________________________________________________________________
2543 BookReader.prototype.search = function(term) {
2544 term = term.replace(/\//g, ' '); // strip slashes
2545 this.searchTerm = term;
2546 $('#BookReaderSearchScript').remove();
2547 var script = document.createElement("script");
2548 script.setAttribute('id', 'BookReaderSearchScript');
2549 script.setAttribute("type", "text/javascript");
2550 script.setAttribute("src", 'http://'+this.server+'/BookReader/flipbook_search_br.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=br.BRSearchCallback');
2551 document.getElementsByTagName('head')[0].appendChild(script);
2552 $('#BookReaderSearchBox').val(term);
2553 $('#BookReaderSearchResults').html('Searching...');
2556 // BRSearchCallback()
2557 //______________________________________________________________________________
2558 BookReader.prototype.BRSearchCallback = function(txt) {
2560 if (jQuery.browser.msie) {
2561 var dom=new ActiveXObject("Microsoft.XMLDOM");
2565 var parser = new DOMParser();
2566 var dom = parser.parseFromString(txt, "text/xml");
2569 $('#BookReaderSearchResults').empty();
2570 $('#BookReaderSearchResults').append('<ul>');
2572 for (var key in this.searchResults) {
2573 if (null != this.searchResults[key].div) {
2574 $(this.searchResults[key].div).remove();
2576 delete this.searchResults[key];
2579 var pages = dom.getElementsByTagName('PAGE');
2581 if (0 == pages.length) {
2582 // $$$ it would be nice to echo the (sanitized) search result here
2583 $('#BookReaderSearchResults').append('<li>No search results found</li>');
2585 for (var i = 0; i < pages.length; i++){
2586 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2589 var re = new RegExp (/_(\d{4})\.djvu/);
2590 var reMatch = re.exec(pages[i].getAttribute('file'));
2591 var index = parseInt(reMatch[1], 10);
2592 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2594 var children = pages[i].childNodes;
2596 for (var j=0; j<children.length; j++) {
2597 //console.log(j + ' - ' + children[j].nodeName);
2598 //console.log(children[j].firstChild.nodeValue);
2599 if ('CONTEXT' == children[j].nodeName) {
2600 context += children[j].firstChild.nodeValue;
2601 } else if ('WORD' == children[j].nodeName) {
2602 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2604 var index = this.leafNumToIndex(index);
2605 if (null != index) {
2606 //coordinates are [left, bottom, right, top, [baseline]]
2607 //we'll skip baseline for now...
2608 var coords = children[j].getAttribute('coords').split(',',4);
2609 if (4 == coords.length) {
2610 this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
2615 var pageName = this.getPageName(index);
2616 var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
2617 var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
2618 //TODO: remove hardcoded instance name
2619 $('#BookReaderSearchResults').append('<li><b><a href="javascript:br.jumpToIndex('+index+','+middleX+','+middleY+');">' + pageName + '</a></b> - ' + context + '</li>');
2622 $('#BookReaderSearchResults').append('</ul>');
2624 // $$$ update again for case of loading search URL in new browser window (search box may not have been ready yet)
2625 $('#BookReaderSearchBox').val(this.searchTerm);
2627 this.updateSearchHilites();
2630 // updateSearchHilites()
2631 //______________________________________________________________________________
2632 BookReader.prototype.updateSearchHilites = function() {
2633 if (2 == this.mode) {
2634 this.updateSearchHilites2UP();
2636 this.updateSearchHilites1UP();
2640 // showSearchHilites1UP()
2641 //______________________________________________________________________________
2642 BookReader.prototype.updateSearchHilites1UP = function() {
2644 for (var key in this.searchResults) {
2646 if (-1 != jQuery.inArray(parseInt(key), this.displayedIndices)) {
2647 var result = this.searchResults[key];
2648 if(null == result.div) {
2649 result.div = document.createElement('div');
2650 $(result.div).attr('className', 'BookReaderSearchHilite').appendTo('#pagediv'+key);
2651 //console.log('appending ' + key);
2654 width: (result.r-result.l)/this.reduce + 'px',
2655 height: (result.b-result.t)/this.reduce + 'px',
2656 left: (result.l)/this.reduce + 'px',
2657 top: (result.t)/this.reduce +'px'
2661 //console.log(key + ' not displayed');
2662 this.searchResults[key].div=null;
2668 //______________________________________________________________________________
2669 // Returns the position of the gutter (line between the page images)
2670 BookReader.prototype.twoPageGutter = function() {
2671 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2675 //______________________________________________________________________________
2676 // Returns the offset for the top of the page images
2677 BookReader.prototype.twoPageTop = function() {
2678 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2681 // twoPageCoverWidth()
2682 //______________________________________________________________________________
2683 // Returns the width of the cover div given the total page width
2684 BookReader.prototype.twoPageCoverWidth = function(totalPageWidth) {
2685 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2688 // twoPageGetViewCenter()
2689 //______________________________________________________________________________
2690 // Returns the percentage offset into twopageview div at the center of container div
2691 // { percentageX: float, percentageY: float }
2692 BookReader.prototype.twoPageGetViewCenter = function() {
2695 var containerOffset = $('#BRcontainer').offset();
2696 var viewOffset = $('#BRtwopageview').offset();
2697 center.percentageX = (containerOffset.left - viewOffset.left + ($('#BRcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2698 center.percentageY = (containerOffset.top - viewOffset.top + ($('#BRcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2703 // twoPageCenterView(percentageX, percentageY)
2704 //______________________________________________________________________________
2705 // Centers the point given by percentage from left,top of twopageview
2706 BookReader.prototype.twoPageCenterView = function(percentageX, percentageY) {
2707 if ('undefined' == typeof(percentageX)) {
2710 if ('undefined' == typeof(percentageY)) {
2714 var viewWidth = $('#BRtwopageview').width();
2715 var containerClientWidth = $('#BRcontainer').attr('clientWidth');
2716 var intoViewX = percentageX * viewWidth;
2718 var viewHeight = $('#BRtwopageview').height();
2719 var containerClientHeight = $('#BRcontainer').attr('clientHeight');
2720 var intoViewY = percentageY * viewHeight;
2722 if (viewWidth < containerClientWidth) {
2723 // Can fit width without scrollbars - center by adjusting offset
2724 $('#BRtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2726 // Need to scroll to center
2727 $('#BRtwopageview').css('left', 0);
2728 $('#BRcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2731 if (viewHeight < containerClientHeight) {
2732 // Fits with scrollbars - add offset
2733 $('#BRtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2735 $('#BRtwopageview').css('top', 0);
2736 $('#BRcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2740 // twoPageFlipAreaHeight
2741 //______________________________________________________________________________
2742 // Returns the integer height of the click-to-flip areas at the edges of the book
2743 BookReader.prototype.twoPageFlipAreaHeight = function() {
2744 return parseInt(this.twoPage.height);
2747 // twoPageFlipAreaWidth
2748 //______________________________________________________________________________
2749 // Returns the integer width of the flip areas
2750 BookReader.prototype.twoPageFlipAreaWidth = function() {
2751 var max = 100; // $$$ TODO base on view width?
2754 var width = this.twoPage.width * 0.15;
2755 return parseInt(BookReader.util.clamp(width, min, max));
2758 // twoPageFlipAreaTop
2759 //______________________________________________________________________________
2760 // Returns integer top offset for flip areas
2761 BookReader.prototype.twoPageFlipAreaTop = function() {
2762 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2765 // twoPageLeftFlipAreaLeft
2766 //______________________________________________________________________________
2767 // Left offset for left flip area
2768 BookReader.prototype.twoPageLeftFlipAreaLeft = function() {
2769 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2772 // twoPageRightFlipAreaLeft
2773 //______________________________________________________________________________
2774 // Left offset for right flip area
2775 BookReader.prototype.twoPageRightFlipAreaLeft = function() {
2776 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2779 // twoPagePlaceFlipAreas
2780 //______________________________________________________________________________
2781 // Readjusts position of flip areas based on current layout
2782 BookReader.prototype.twoPagePlaceFlipAreas = function() {
2783 // We don't set top since it shouldn't change relative to view
2784 $(this.twoPage.leftFlipArea).css({
2785 left: this.twoPageLeftFlipAreaLeft() + 'px',
2786 width: this.twoPageFlipAreaWidth() + 'px'
2788 $(this.twoPage.rightFlipArea).css({
2789 left: this.twoPageRightFlipAreaLeft() + 'px',
2790 width: this.twoPageFlipAreaWidth() + 'px'
2794 // showSearchHilites2UP()
2795 //______________________________________________________________________________
2796 BookReader.prototype.updateSearchHilites2UP = function() {
2798 for (var key in this.searchResults) {
2799 key = parseInt(key, 10);
2800 if (-1 != jQuery.inArray(key, this.displayedIndices)) {
2801 var result = this.searchResults[key];
2802 if(null == result.div) {
2803 result.div = document.createElement('div');
2804 $(result.div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
2805 //console.log('appending ' + key);
2808 // We calculate the reduction factor for the specific page because it can be different
2809 // for each page in the spread
2810 var height = this._getPageHeight(key);
2811 var width = this._getPageWidth(key)
2812 var reduce = this.twoPage.height/height;
2813 var scaledW = parseInt(width*reduce);
2815 var gutter = this.twoPageGutter();
2817 if ('L' == this.getPageSide(key)) {
2818 pageL = gutter-scaledW;
2822 var pageT = this.twoPageTop();
2825 width: (result.r-result.l)*reduce + 'px',
2826 height: (result.b-result.t)*reduce + 'px',
2827 left: pageL+(result.l)*reduce + 'px',
2828 top: pageT+(result.t)*reduce +'px'
2832 //console.log(key + ' not displayed');
2833 if (null != this.searchResults[key].div) {
2834 //console.log('removing ' + key);
2835 $(this.searchResults[key].div).remove();
2837 this.searchResults[key].div=null;
2842 // removeSearchHilites()
2843 //______________________________________________________________________________
2844 BookReader.prototype.removeSearchHilites = function() {
2845 for (var key in this.searchResults) {
2846 if (null != this.searchResults[key].div) {
2847 $(this.searchResults[key].div).remove();
2848 this.searchResults[key].div=null;
2854 //______________________________________________________________________________
2855 BookReader.prototype.printPage = function() {
2856 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2858 /* iframe implementation
2860 if (null != this.printPopup) { // check if already showing
2863 this.printPopup = document.createElement("div");
2864 $(this.printPopup).css({
2865 position: 'absolute',
2867 left: ($('#BRcontainer').width()-400)/2 + 'px',
2870 border: "3px double #999999",
2872 backgroundColor: "#fff"
2873 }).appendTo('#BookReader');
2876 if (this.constMode1up == this.mode) {
2877 indexToPrint = this.firstIndex;
2879 indexToPrint = this.twoPage.currentIndexL;
2882 this.indexToPrint = indexToPrint;
2884 var htmlStr = '<div style="text-align: center;">';
2885 htmlStr = '<p style="text-align:center;"><b><a href="javascript:void(0);" onclick="window.frames[0].focus(); window.frames[0].print(); return false;">Click here to print this page</a></b></p>';
2886 htmlStr += '<div id="printDiv" name="printDiv" style="text-align: center; width: 233px; margin: auto">'
2887 htmlStr += '<p style="text-align:right; margin: 0; font-size: 0.85em">';
2888 //htmlStr += '<button class="BRicon rollover book_up" onclick="br.updatePrintFrame(-1); return false;"></button> ';
2889 //htmlStr += '<button class="BRicon rollover book_down" onclick="br.updatePrintFrame(1); return false;"></button>';
2890 htmlStr += '<a href="#" onclick="br.updatePrintFrame(-1); return false;">Prev</a> <a href="#" onclick="br.updatePrintFrame(1); return false;">Next</a>';
2892 htmlStr += '</div>';
2893 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.printPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2894 htmlStr += '</div>';
2896 this.printPopup.innerHTML = htmlStr;
2898 var iframe = document.createElement('iframe');
2899 iframe.id = 'printFrame';
2900 iframe.name = 'printFrame';
2901 iframe.width = '233px'; // 8.5 x 11 aspect
2902 iframe.height = '300px';
2904 var self = this; // closure
2906 $(iframe).load(function() {
2907 var doc = BookReader.util.getIFrameDocument(this);
2908 $('body', doc).html(self.getPrintFrameContent(self.indexToPrint));
2911 $('#printDiv').prepend(iframe);
2915 // Get print URI from current indices and mode
2916 BookReader.prototype.getPrintURI = function() {
2918 if (this.constMode2up == this.mode) {
2919 indexToPrint = this.twoPage.currentIndexL;
2921 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2924 var options = 'id=' + this.bookId + '&server=' + this.server + '&zip=' + this.zip
2925 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2926 + '&width=' + this._getPageWidth(indexToPrint) + '&height=' + this._getPageHeight(indexToPrint);
2928 if (this.constMode2up == this.mode) {
2929 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this._getPageWidth(this.twoPage.currentIndexR);
2930 options += '&height2=' + this._getPageHeight(this.twoPage.currentIndexR);
2931 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2933 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2936 return '/bookreader/print.php?' + options;
2939 /* iframe implementation
2940 BookReader.prototype.getPrintFrameContent = function(index) {
2941 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2942 // 8.5x11 so we should end up not overflowing on either paper size.
2943 var paperAspect = 8.5 / 11;
2944 var imageAspect = this._getPageWidth(index) / this._getPageHeight(index);
2948 // Rotate if possible and appropriate, to get larger image size on printed page
2949 if (this.canRotatePage(index)) {
2950 if (imageAspect > 1 && imageAspect > paperAspect) {
2951 // more wide than square, and more wide than paper
2953 imageAspect = 1/imageAspect;
2958 if (imageAspect > paperAspect) {
2959 // wider than paper, fit width
2960 fitAttrs = 'width="95%"';
2962 // taller than paper, fit height
2963 fitAttrs = 'height="95%"';
2966 var imageURL = this._getPageURI(index, 1, rotate);
2967 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2968 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2969 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2970 iframeStr += '</div>';
2971 iframeStr += '</body></html>';
2976 BookReader.prototype.updatePrintFrame = function(delta) {
2977 var newIndex = this.indexToPrint + delta;
2978 newIndex = BookReader.util.clamp(newIndex, 0, this.numLeafs - 1);
2979 if (newIndex == this.indexToPrint) {
2982 this.indexToPrint = newIndex;
2983 var doc = BookReader.util.getIFrameDocument($('#printFrame')[0]);
2984 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2989 //______________________________________________________________________________
2990 BookReader.prototype.showEmbedCode = function() {
2991 if (null != this.embedPopup) { // check if already showing
2995 this.embedPopup = document.createElement("div");
2996 $(this.embedPopup).css({
2997 position: 'absolute',
2999 left: ($('#BRcontainer').attr('clientWidth')-400)/2 + 'px',
3002 border: "3px double #999999",
3004 backgroundColor: "#fff"
3005 }).appendTo('#BookReader');
3007 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
3008 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>';
3009 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
3010 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
3012 this.embedPopup.innerHTML = htmlStr;
3013 $(this.embedPopup).find('input').bind('click', function() {
3019 //______________________________________________________________________________
3020 BookReader.prototype.autoToggle = function() {
3022 var bComingFrom1up = false;
3023 if (2 != this.mode) {
3024 bComingFrom1up = true;
3028 // Change to autofit if book is too large
3029 if (this.reduce < this.twoPageGetAutofitReduce()) {
3034 if (null == this.autoTimer) {
3035 this.flipSpeed = 2000;
3037 // $$$ Draw events currently cause layout problems when they occur during animation.
3038 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
3039 // we workaround for now by not triggering immediate animation in that case.
3040 // See https://bugs.launchpad.net/gnubook/+bug/328327
3041 if (('rl' == this.pageProgression) && bComingFrom1up) {
3042 // don't flip immediately -- wait until timer fires
3045 this.flipFwdToIndex();
3048 $('#BRtoolbar .play').hide();
3049 $('#BRtoolbar .pause').show();
3050 this.autoTimer=setInterval(function(){
3051 if (self.animating) {return;}
3053 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
3054 self.flipBackToIndex(1); // $$$ really what we want?
3056 self.flipFwdToIndex();
3065 //______________________________________________________________________________
3066 // Stop autoplay mode, allowing animations to finish
3067 BookReader.prototype.autoStop = function() {
3068 if (null != this.autoTimer) {
3069 clearInterval(this.autoTimer);
3070 this.flipSpeed = 'fast';
3071 $('#BRtoolbar .pause').hide();
3072 $('#BRtoolbar .play').show();
3073 this.autoTimer = null;
3077 // stopFlipAnimations
3078 //______________________________________________________________________________
3079 // Immediately stop flip animations. Callbacks are triggered.
3080 BookReader.prototype.stopFlipAnimations = function() {
3082 this.autoStop(); // Clear timers
3084 // Stop animation, clear queue, trigger callbacks
3085 if (this.leafEdgeTmp) {
3086 $(this.leafEdgeTmp).stop(false, true);
3088 jQuery.each(this.prefetchedImgs, function() {
3089 $(this).stop(false, true);
3092 // And again since animations also queued in callbacks
3093 if (this.leafEdgeTmp) {
3094 $(this.leafEdgeTmp).stop(false, true);
3096 jQuery.each(this.prefetchedImgs, function() {
3097 $(this).stop(false, true);
3102 // keyboardNavigationIsDisabled(event)
3103 // - returns true if keyboard navigation should be disabled for the event
3104 //______________________________________________________________________________
3105 BookReader.prototype.keyboardNavigationIsDisabled = function(event) {
3106 if (event.target.tagName == "INPUT") {
3112 // gutterOffsetForIndex
3113 //______________________________________________________________________________
3115 // Returns the gutter offset for the spread containing the given index.
3116 // This function supports RTL
3117 BookReader.prototype.gutterOffsetForIndex = function(pindex) {
3119 // To find the offset of the gutter from the middle we calculate our percentage distance
3120 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
3121 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
3123 // But then again for RTL it's the opposite
3124 if ('rl' == this.pageProgression) {
3132 //______________________________________________________________________________
3133 // Returns the width of the leaf edge div for the page with index given
3134 BookReader.prototype.leafEdgeWidth = function(pindex) {
3135 // $$$ could there be single pixel rounding errors for L vs R?
3136 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
3137 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3139 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3143 // jumpIndexForLeftEdgePageX
3144 //______________________________________________________________________________
3145 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
3146 BookReader.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
3147 if ('rl' != this.pageProgression) {
3148 // LTR - flipping backward
3149 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3151 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
3152 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
3156 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3157 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
3162 // jumpIndexForRightEdgePageX
3163 //______________________________________________________________________________
3164 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
3165 BookReader.prototype.jumpIndexForRightEdgePageX = function(pageX) {
3166 if ('rl' != this.pageProgression) {
3168 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
3169 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
3172 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
3173 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
3178 BookReader.prototype.initToolbar = function(mode, ui) {
3180 $("#BookReader").append("<div id='BRtoolbar'>"
3181 + "<span id='BRtoolbarbuttons' style='float: right'>"
3182 + "<button class='BRicon print rollover' /> <button class='BRicon rollover embed' />"
3183 + "<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>"
3184 + "<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>"
3185 + "<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>"
3186 + "<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>"
3187 + "<button class='BRicon rollover play' /><button class='BRicon rollover pause' style='display: none' />"
3191 + "<a class='BRicon logo rollover' href='" + this.logoURL + "'> </a>"
3192 + " <button class='BRicon rollover zoom_out' onclick='br.zoom(-1); return false;'/>"
3193 + "<button class='BRicon rollover zoom_in' onclick='br.zoom(1); return false;'/>"
3194 + " <span class='label'>Zoom: <span id='BRzoom'>"+parseInt(100/this.reduce)+"</span></span>"
3195 + " <button class='BRicon rollover one_page_mode' onclick='br.switchMode(1); return false;'/>"
3196 + " <button class='BRicon rollover two_page_mode' onclick='br.switchMode(2); return false;'/>"
3197 + " <button class='BRicon rollover thumbnail_mode' onclick='br.switchMode(3); return false;'/>"
3200 + "<span id='#BRbooktitle'>"
3201 + " <a class='BRblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
3205 this.updateToolbarZoom(this.reduce); // Pretty format
3207 if (ui == "embed") {
3208 $("#BookReader a.logo").attr("target","_blank");
3211 // $$$ turn this into a member variable
3212 var jToolbar = $('#BRtoolbar'); // j prefix indicates jQuery object
3214 // We build in mode 2
3217 this.bindToolbarNavHandlers(jToolbar);
3219 // Setup tooltips -- later we could load these from a file for i18n
3220 var titles = { '.logo': 'Go to Archive.org',
3221 '.zoom_in': 'Zoom in',
3222 '.zoom_out': 'Zoom out',
3223 '.one_page_mode': 'One-page view',
3224 '.two_page_mode': 'Two-page view',
3225 '.thumbnail_mode': 'Thumbnail view',
3226 '.print': 'Print this page',
3227 '.embed': 'Embed bookreader',
3228 '.book_left': 'Flip left',
3229 '.book_right': 'Flip right',
3230 '.book_up': 'Page up',
3231 '.book_down': 'Page down',
3234 '.book_top': 'First page',
3235 '.book_bottom': 'Last page'
3237 if ('rl' == this.pageProgression) {
3238 titles['.book_leftmost'] = 'Last page';
3239 titles['.book_rightmost'] = 'First page';
3241 titles['.book_leftmost'] = 'First page';
3242 titles['.book_rightmost'] = 'Last page';
3245 for (var icon in titles) {
3246 jToolbar.find(icon).attr('title', titles[icon]);
3249 // Hide mode buttons and autoplay if 2up is not available
3250 // $$$ if we end up with more than two modes we should show the applicable buttons
3251 if ( !this.canSwitchToMode(this.constMode2up) ) {
3252 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
3255 // Switch to requested mode -- binds other click handlers
3256 this.switchToolbarMode(mode);
3261 // switchToolbarMode
3262 //______________________________________________________________________________
3263 // Update the toolbar for the given mode (changes navigation buttons)
3264 // $$$ we should soon split the toolbar out into its own module
3265 BookReader.prototype.switchToolbarMode = function(mode) {
3268 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3269 $('#BRtoolbar .BRtoolbarmode2').hide();
3270 $('#BRtoolbar .BRtoolbarmode3').hide();
3271 $('#BRtoolbar .BRtoolbarmode1').show().css('display', 'inline');
3272 } else if (2 == mode) {
3274 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3275 $('#BRtoolbar .BRtoolbarmode1').hide();
3276 $('#BRtoolbar .BRtoolbarmode3').hide();
3277 $('#BRtoolbar .BRtoolbarmode2').show().css('display', 'inline');
3280 $('#BRtoolbar .BRtoolbarzoom').hide();
3281 $('#BRtoolbar .BRtoolbarmode2').hide();
3282 $('#BRtoolbar .BRtoolbarmode1').hide();
3283 $('#BRtoolbar .BRtoolbarmode3').show().css('display', 'inline');
3287 // bindToolbarNavHandlers
3288 //______________________________________________________________________________
3289 // Binds the toolbar handlers
3290 BookReader.prototype.bindToolbarNavHandlers = function(jToolbar) {
3292 var self = this; // closure
3294 jToolbar.find('.book_left').bind('click', function(e) {
3299 jToolbar.find('.book_right').bind('click', function(e) {
3304 jToolbar.find('.book_up').bind('click', function(e) {
3305 if ($.inArray(self.mode, [self.constMode2up, self.constModeThumb])) {
3313 jToolbar.find('.book_down').bind('click', function(e) {
3314 if ($.inArray(self.mode, [self.constMode2up, self.constModeThumb])) {
3322 jToolbar.find('.print').bind('click', function(e) {
3327 jToolbar.find('.embed').bind('click', function(e) {
3328 self.showEmbedCode();
3332 jToolbar.find('.play').bind('click', function(e) {
3337 jToolbar.find('.pause').bind('click', function(e) {
3342 jToolbar.find('.book_top').bind('click', function(e) {
3347 jToolbar.find('.book_bottom').bind('click', function(e) {
3352 jToolbar.find('.book_leftmost').bind('click', function(e) {
3357 jToolbar.find('.book_rightmost').bind('click', function(e) {
3363 // updateToolbarZoom(reduce)
3364 //______________________________________________________________________________
3365 // Update the displayed zoom factor based on reduction factor
3366 BookReader.prototype.updateToolbarZoom = function(reduce) {
3368 if (this.constMode2up == this.mode && this.twoPage.autofit) {
3371 value = (100 / reduce).toFixed(2);
3372 // Strip trailing zeroes and decimal if all zeroes
3373 value = value.replace(/0+$/,'');
3374 value = value.replace(/\.$/,'');
3377 $('#BRzoom').text(value);
3380 // firstDisplayableIndex
3381 //______________________________________________________________________________
3382 // Returns the index of the first visible page, dependent on the mode.
3383 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3384 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
3385 BookReader.prototype.firstDisplayableIndex = function() {
3386 if (this.mode != this.constMode2up) {
3390 if ('rl' != this.pageProgression) {
3392 if (this.getPageSide(0) == 'L') {
3399 if (this.getPageSide(0) == 'R') {
3407 // lastDisplayableIndex
3408 //______________________________________________________________________________
3409 // Returns the index of the last visible page, dependent on the mode.
3410 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3411 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
3412 BookReader.prototype.lastDisplayableIndex = function() {
3414 var lastIndex = this.numLeafs - 1;
3416 if (this.mode != this.constMode2up) {
3420 if ('rl' != this.pageProgression) {
3422 if (this.getPageSide(lastIndex) == 'R') {
3425 return lastIndex + 1;
3429 if (this.getPageSide(lastIndex) == 'L') {
3432 return lastIndex + 1;
3437 // shortTitle(maximumCharacters)
3439 // Returns a shortened version of the title with the maximum number of characters
3440 BookReader.prototype.shortTitle = function(maximumCharacters) {
3441 if (this.bookTitle.length < maximumCharacters) {
3442 return this.bookTitle;
3445 var title = this.bookTitle.substr(0, maximumCharacters - 3);
3450 // Parameter related functions
3452 // updateFromParams(params)
3454 // Update ourselves from the params object.
3456 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
3457 BookReader.prototype.updateFromParams = function(params) {
3458 if ('undefined' != typeof(params.mode)) {
3459 this.switchMode(params.mode);
3463 if ('undefined' != typeof(params.searchTerm)) {
3464 if (this.searchTerm != params.searchTerm) {
3465 this.search(params.searchTerm);
3469 // $$$ process /zoom
3471 // We only respect page if index is not set
3472 if ('undefined' != typeof(params.index)) {
3473 if (params.index != this.currentIndex()) {
3474 this.jumpToIndex(params.index);
3476 } else if ('undefined' != typeof(params.page)) {
3477 // $$$ this assumes page numbers are unique
3478 if (params.page != this.getPageNum(this.currentIndex())) {
3479 this.jumpToPage(params.page);
3483 // $$$ process /region
3484 // $$$ process /highlight
3487 // paramsFromFragment(urlFragment)
3489 // Returns a object with configuration parametes from a URL fragment.
3491 // E.g paramsFromFragment(window.location.hash)
3492 BookReader.prototype.paramsFromFragment = function(urlFragment) {
3493 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
3497 // For convenience we allow an initial # character (as from window.location.hash)
3498 // but don't require it
3499 if (urlFragment.substr(0,1) == '#') {
3500 urlFragment = urlFragment.substr(1);
3503 // Simple #nn syntax
3504 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3505 if ( !isNaN(oldStyleLeafNum) ) {
3506 params.index = oldStyleLeafNum;
3508 // Done processing if using old-style syntax
3512 // Split into key-value pairs
3513 var urlArray = urlFragment.split('/');
3515 for (var i = 0; i < urlArray.length; i += 2) {
3516 urlHash[urlArray[i]] = urlArray[i+1];
3520 if ('1up' == urlHash['mode']) {
3521 params.mode = this.constMode1up;
3522 } else if ('2up' == urlHash['mode']) {
3523 params.mode = this.constMode2up;
3524 } else if ('thumb' == urlHash['mode']) {
3525 params.mode = this.constModeThumb;
3529 if ('undefined' != typeof(urlHash['page'])) {
3530 // page was set -- may not be int
3531 params.page = urlHash['page'];
3534 // $$$ process /region
3535 // $$$ process /search
3537 if (urlHash['search'] != undefined) {
3538 params.searchTerm = BookReader.util.decodeURIComponentPlus(urlHash['search']);
3541 // $$$ process /highlight
3546 // paramsFromCurrent()
3548 // Create a params object from the current parameters.
3549 BookReader.prototype.paramsFromCurrent = function() {
3553 var index = this.currentIndex();
3554 var pageNum = this.getPageNum(index);
3555 if ((pageNum === 0) || pageNum) {
3556 params.page = pageNum;
3559 params.index = index;
3560 params.mode = this.mode;
3566 if (this.searchHighlightVisible()) {
3567 params.searchTerm = this.searchTerm;
3573 // fragmentFromParams(params)
3575 // Create a fragment string from the params object.
3576 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3577 BookReader.prototype.fragmentFromParams = function(params) {
3578 var separator = '/';
3582 if ('undefined' != typeof(params.page)) {
3583 fragments.push('page', params.page);
3585 // Don't have page numbering -- use index instead
3586 fragments.push('page', 'n' + params.index);
3593 if ('undefined' != typeof(params.mode)) {
3594 if (params.mode == this.constMode1up) {
3595 fragments.push('mode', '1up');
3596 } else if (params.mode == this.constMode2up) {
3597 fragments.push('mode', '2up');
3598 } else if (params.mode == this.constModeThumb) {
3599 fragments.push('mode', 'thumb');
3601 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3606 if (params.searchTerm) {
3607 fragments.push('search', params.searchTerm);
3610 return BookReader.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3613 // getPageIndex(pageNum)
3615 // Returns the *highest* index the given page number, or undefined
3616 BookReader.prototype.getPageIndex = function(pageNum) {
3617 var pageIndices = this.getPageIndices(pageNum);
3619 if (pageIndices.length > 0) {
3620 return pageIndices[pageIndices.length - 1];
3626 // getPageIndices(pageNum)
3628 // Returns an array (possibly empty) of the indices with the given page number
3629 BookReader.prototype.getPageIndices = function(pageNum) {
3632 // Check for special "nXX" page number
3633 if (pageNum.slice(0,1) == 'n') {
3635 var pageIntStr = pageNum.slice(1, pageNum.length);
3636 var pageIndex = parseInt(pageIntStr);
3637 indices.push(pageIndex);
3640 // Do nothing... will run through page names and see if one matches
3645 for (i=0; i<this.numLeafs; i++) {
3646 if (this.getPageNum(i) == pageNum) {
3654 // getPageName(index)
3656 // Returns the name of the page as it should be displayed in the user interface
3657 BookReader.prototype.getPageName = function(index) {
3658 return 'Page ' + this.getPageNum(index);
3661 // updateLocationHash
3663 // Update the location hash from the current parameters. Call this instead of manually
3664 // using window.location.replace
3665 BookReader.prototype.updateLocationHash = function() {
3666 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3667 window.location.replace(newHash);
3669 // This is the variable checked in the timer. Only user-generated changes
3670 // to the URL will trigger the event.
3671 this.oldLocationHash = newHash;
3674 // startLocationPolling
3676 // Starts polling of window.location to see hash fragment changes
3677 BookReader.prototype.startLocationPolling = function() {
3678 var self = this; // remember who I am
3679 self.oldLocationHash = window.location.hash;
3681 if (this.locationPollId) {
3682 clearInterval(this.locationPollID);
3683 this.locationPollId = null;
3686 this.locationPollId = setInterval(function() {
3687 var newHash = window.location.hash;
3688 if (newHash != self.oldLocationHash) {
3689 if (newHash != self.oldUserHash) { // Only process new user hash once
3690 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3692 // Queue change if animating
3693 if (self.animating) {
3695 self.animationFinishedCallback = function() {
3696 self.updateFromParams(self.paramsFromFragment(newHash));
3698 } else { // update immediately
3699 self.updateFromParams(self.paramsFromFragment(newHash));
3701 self.oldUserHash = newHash;
3709 // Returns true if we can switch to the requested mode
3710 BookReader.prototype.canSwitchToMode = function(mode) {
3711 if (mode == this.constMode2up) {
3712 // check there are enough pages to display
3713 // $$$ this is a workaround for the mis-feature that we can't display
3714 // short books in 2up mode
3715 if (this.numLeafs < 6) {
3723 // searchHighlightVisible
3725 // Returns true if a search highlight is currently being displayed
3726 BookReader.prototype.searchHighlightVisible = function() {
3727 if (this.constMode2up == this.mode) {
3728 if (this.searchResults[this.twoPage.currentIndexL]
3729 || this.searchResults[this.twoPage.currentIndexR]) {
3733 if (this.searchResults[this.currentIndex()]) {
3740 // getPageBackgroundColor
3742 // Returns a CSS property string for the background color for the given page
3743 // $$$ turn into regular CSS?
3744 BookReader.prototype.getPageBackgroundColor = function(index) {
3745 if (index >= 0 && index < this.numLeafs) {
3747 return this.pageDefaultBackgroundColor;
3755 // Returns the page width for the given index, or first or last page if out of range
3756 BookReader.prototype._getPageWidth = function(index) {
3757 // Synthesize a page width for pages not actually present in book.
3758 // May or may not be the best approach.
3759 // If index is out of range we return the width of first or last page
3760 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3761 return this.getPageWidth(index);
3766 // Returns the page height for the given index, or first or last page if out of range
3767 BookReader.prototype._getPageHeight= function(index) {
3768 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3769 return this.getPageHeight(index);
3774 // Returns the page URI or transparent image if out of range
3775 BookReader.prototype._getPageURI = function(index, reduce, rotate) {
3776 if (index < 0 || index >= this.numLeafs) { // Synthesize page
3777 return this.imagesBaseURL + "/transparent.png";
3780 if ('undefined' == typeof(reduce)) {
3781 // reduce not passed in
3782 // $$$ this probably won't work for thumbnail mode
3783 var ratio = this.getPageHeight(index) / this.twoPage.height;
3785 // $$$ we make an assumption here that the scales are available pow2 (like kakadu)
3788 } else if (ratio < 4) {
3790 } else if (ratio < 8) {
3792 } else if (ratio < 16) {
3794 } else if (ratio < 32) {
3802 return this.getPageURI(index, reduce, rotate);
3805 // Library functions
3807 disableSelect: function(jObject) {
3808 // Bind mouse handlers
3809 // Disable mouse click to avoid selected/highlighted page images - bug 354239
3810 jObject.bind('mousedown', function(e) {
3811 // $$$ check here for right-click and don't disable. Also use jQuery style
3812 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
3815 // Special hack for IE7
3816 jObject[0].onselectstart = function(e) { return false; };
3819 clamp: function(value, min, max) {
3820 return Math.min(Math.max(value, min), max);
3823 getIFrameDocument: function(iframe) {
3824 // Adapted from http://xkr.us/articles/dom/iframe-document/
3825 var outer = (iframe.contentWindow || iframe.contentDocument);
3826 return (outer.document || outer);
3829 decodeURIComponentPlus: function(value) {
3830 // Decodes a URI component and converts '+' to ' '
3831 return decodeURIComponent(value).replace(/\+/g, ' ');
3834 encodeURIComponentPlus: function(value) {
3835 // Encodes a URI component and converts ' ' to '+'
3836 return encodeURIComponent(value).replace(/%20/g, '+');
3838 // The final property here must NOT have a comma after it - IE7