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() {
984 //var viewWidth = $('#BRcontainer').width(); //includes scrollBar
985 var viewWidth = $('#BRcontainer').attr('clientWidth');
987 var oldScrollTop = $('#BRcontainer').attr('scrollTop');
988 var oldScrollLeft = $('#BRcontainer').attr('scrollLeft');
989 var oldPageViewHeight = $('#BRpageview').height();
990 var oldPageViewWidth = $('#BRpageview').width();
992 var oldCenterY = this.centerY1up();
993 var oldCenterX = this.centerX1up();
995 if (0 != oldPageViewHeight) {
996 var scrollRatio = oldCenterY / oldPageViewHeight;
1001 for (i=0; i<this.numLeafs; i++) {
1002 viewHeight += parseInt(this._getPageHeight(i)/this.reduce) + this.padding;
1003 var width = parseInt(this._getPageWidth(i)/this.reduce);
1004 if (width>viewWidth) viewWidth=width;
1006 $('#BRpageview').height(viewHeight);
1007 $('#BRpageview').width(viewWidth);
1009 var newCenterY = scrollRatio*viewHeight;
1010 var newTop = Math.max(0, Math.floor( newCenterY - $('#BRcontainer').height()/2 ));
1011 $('#BRcontainer').attr('scrollTop', newTop);
1013 // We use clientWidth here to avoid miscalculating due to scroll bar
1014 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
1015 var newLeft = newCenterX - $('#BRcontainer').attr('clientWidth') / 2;
1016 newLeft = Math.max(newLeft, 0);
1017 $('#BRcontainer').attr('scrollLeft', newLeft);
1018 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
1020 //this.centerPageView();
1023 // $$$ jump to index here? index is not preserved when resizing in thumb mode
1025 // Not really needed until there is 1up autofit
1026 this.removeSearchHilites();
1027 this.updateSearchHilites();
1031 //______________________________________________________________________________
1032 // Returns the current offset of the viewport center in scaled document coordinates.
1033 BookReader.prototype.centerX1up = function() {
1035 if ($('#BRpageview').width() < $('#BRcontainer').attr('clientWidth')) { // fully shown
1036 centerX = $('#BRpageview').width();
1038 centerX = $('#BRcontainer').attr('scrollLeft') + $('#BRcontainer').attr('clientWidth') / 2;
1040 centerX = Math.floor(centerX);
1045 //______________________________________________________________________________
1046 // Returns the current offset of the viewport center in scaled document coordinates.
1047 BookReader.prototype.centerY1up = function() {
1048 var centerY = $('#BRcontainer').attr('scrollTop') + $('#BRcontainer').height() / 2;
1049 return Math.floor(centerY);
1053 //______________________________________________________________________________
1054 BookReader.prototype.centerPageView = function() {
1056 var scrollWidth = $('#BRcontainer').attr('scrollWidth');
1057 var clientWidth = $('#BRcontainer').attr('clientWidth');
1058 //console.log('sW='+scrollWidth+' cW='+clientWidth);
1059 if (scrollWidth > clientWidth) {
1060 $('#BRcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
1065 // zoom2up(direction)
1066 //______________________________________________________________________________
1067 BookReader.prototype.zoom2up = function(direction) {
1069 // Hard stop autoplay
1070 this.stopFlipAnimations();
1072 // Get new zoom state
1073 var newZoom = this.twoPageNextReduce(this.reduce, direction);
1074 if ((this.reduce == newZoom.reduce) && (this.twoPage.autofit == newZoom.autofit)) {
1077 this.twoPage.autofit = newZoom.autofit;
1078 this.reduce = newZoom.reduce;
1079 this.pageScale = this.reduce; // preserve current reduce
1081 // Preserve view center position
1082 var oldCenter = this.twoPageGetViewCenter();
1084 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
1085 // $$$ An improvement would be to use the low res image until the larger one is loaded.
1086 if (1 == direction) {
1087 for (var img in this.prefetchedImgs) {
1088 delete this.prefetchedImgs[img];
1092 // Prepare view with new center to minimize visual glitches
1093 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
1096 BookReader.prototype.zoomThumb = function(direction) {
1097 var oldColumns = this.thumbColumns;
1098 switch (direction) {
1100 this.thumbColumns += 1;
1103 this.thumbColumns -= 1;
1108 if (this.thumbColumns < 2) {
1109 this.thumbColumns = 2;
1110 } else if (this.thumbColumns > 8) {
1111 this.thumbColumns = 8;
1114 if (this.thumbColumns != oldColumns) {
1115 this.prepareThumbnailView();
1116 this.jumpToIndex(this.currentIndex());
1120 // Returns the width per thumbnail to display the requested number of columns
1121 // Note: #BRpageview must already exist since its width is used to calculate the
1123 BookReader.prototype.getThumbnailWidth = function(thumbnailColumns) {
1124 var padding = (thumbnailColumns + 1) * this.padding;
1125 var width = ($('#BRpageview').width() - padding) / (thumbnailColumns + 0.5); // extra 0.5 is for some space at sides
1126 return parseInt(width);
1129 // quantizeReduce(reduce)
1130 //______________________________________________________________________________
1131 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
1132 BookReader.prototype.quantizeReduce = function(reduce) {
1133 var quantized = this.reductionFactors[0];
1134 var distance = Math.abs(reduce - quantized);
1135 for (var i = 1; i < this.reductionFactors.length; i++) {
1136 newDistance = Math.abs(reduce - this.reductionFactors[i]);
1137 if (newDistance < distance) {
1138 distance = newDistance;
1139 quantized = this.reductionFactors[i];
1146 // twoPageNextReduce()
1147 //______________________________________________________________________________
1148 // Returns the next reduction level
1149 BookReader.prototype.twoPageNextReduce = function(reduce, direction) {
1151 var autofitReduce = this.twoPageGetAutofitReduce();
1153 if (0 == direction) { // autofit
1154 result.autofit = true;
1155 result.reduce = autofitReduce;
1157 } else if (1 == direction) { // zoom in
1158 var newReduce = this.reductionFactors[0];
1160 for (var i = 1; i < this.reductionFactors.length; i++) {
1161 if (this.reductionFactors[i] < reduce) {
1162 newReduce = this.reductionFactors[i];
1166 if (!this.twoPage.autofit && (autofitReduce < reduce && autofitReduce > newReduce)) {
1168 result.autofit = true;
1169 result.reduce = autofitReduce;
1171 result.autofit = false;
1172 result.reduce = newReduce;
1175 } else { // zoom out
1176 var lastIndex = this.reductionFactors.length - 1;
1177 var newReduce = this.reductionFactors[lastIndex];
1179 for (var i = lastIndex; i >= 0; i--) {
1180 if (this.reductionFactors[i] > reduce) {
1181 newReduce = this.reductionFactors[i];
1185 if (!this.twoPage.autofit && (autofitReduce > reduce && autofitReduce < newReduce)) {
1187 result.autofit = true;
1188 result.reduce = autofitReduce;
1190 result.autofit = false;
1191 result.reduce = newReduce;
1199 //______________________________________________________________________________
1200 // Attempts to jump to page. Returns true if page could be found, false otherwise.
1201 BookReader.prototype.jumpToPage = function(pageNum) {
1203 var pageIndex = this.getPageIndex(pageNum);
1205 if ('undefined' != typeof(pageIndex)) {
1208 this.jumpToIndex(pageIndex);
1209 $('#BRcontainer').attr('scrollTop', leafTop);
1218 //______________________________________________________________________________
1219 BookReader.prototype.jumpToIndex = function(index, pageX, pageY) {
1221 if (2 == this.mode) {
1224 // By checking against min/max we do nothing if requested index
1226 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1227 this.flipBackToIndex(index);
1228 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
1229 this.flipFwdToIndex(index);
1232 } else if (3 == this.mode) {
1233 var viewWidth = $('#BRcontainer').attr('scrollWidth') - 20; // width minus buffer
1243 for (i=0; i<(index+1); i++) {
1244 leafWidth = this.thumbWidth;
1245 if (rightPos + (leafWidth + this.padding) > viewWidth){
1250 leafHeight = parseInt((this.getPageHeight(leaf)*this.thumbWidth)/this.getPageWidth(leaf), 10);
1251 if(leafHeight > rowHeight) { rowHeight = leafHeight; }
1252 if (leafIndex==0) { leafTop = bottomPos; }
1253 if (leafIndex==0) { bottomPos += this.padding + rowHeight; }
1254 rightPos += leafWidth + this.padding;
1257 this.firstIndex=index;
1258 if ($('#BRcontainer').attr('scrollTop') == leafTop) {
1261 $('#BRcontainer').animate({scrollTop: leafTop },'fast');
1268 for (i=0; i<index; i++) {
1269 h = parseInt(this._getPageHeight(i)/this.reduce);
1270 leafTop += h + this.padding;
1274 //console.log('pageY ' + pageY);
1275 var offset = parseInt( (pageY) / this.reduce);
1276 offset -= $('#BRcontainer').attr('clientHeight') >> 1;
1277 //console.log( 'jumping to ' + leafTop + ' ' + offset);
1282 var offset = parseInt( (pageX) / this.reduce);
1283 offset -= $('#BRcontainer').attr('clientWidth') >> 1;
1287 //$('#BRcontainer').attr('scrollTop', leafTop);
1288 $('#BRcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
1294 //______________________________________________________________________________
1295 BookReader.prototype.switchMode = function(mode) {
1297 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
1299 if (mode == this.mode) {
1303 if (!this.canSwitchToMode(mode)) {
1308 this.removeSearchHilites();
1311 this.switchToolbarMode(mode);
1313 // reinstate scale if moving from thumbnail view
1314 if (this.pageScale != this.reduce) {
1315 this.reduce = this.pageScale;
1318 // $$$ TODO preserve center of view when switching between mode
1319 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
1322 this.reduce = this.quantizeReduce(this.reduce);
1323 this.prepareOnePageView();
1324 } else if (3 == mode) {
1325 this.reduce = this.quantizeReduce(this.reduce);
1326 this.prepareThumbnailView();
1327 this.jumpToIndex(this.currentIndex());
1329 // $$$ why don't we save autofit?
1330 this.twoPage.autofit = false; // Take zoom level from other mode
1331 this.reduce = this.quantizeReduce(this.reduce);
1332 this.prepareTwoPageView();
1333 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
1338 //prepareOnePageView()
1339 //______________________________________________________________________________
1340 BookReader.prototype.prepareOnePageView = function() {
1342 // var startLeaf = this.displayedIndices[0];
1343 var startLeaf = this.currentIndex();
1345 $('#BRcontainer').empty();
1346 $('#BRcontainer').css({
1347 overflowY: 'scroll',
1351 $("#BRcontainer").append("<div id='BRpageview'></div>");
1352 // $$$ keep select enabled for now since disabling it breaks keyboard
1353 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1354 // BookReader.util.disableSelect($('#BRpageview'));
1356 this.resizePageView();
1358 this.jumpToIndex(startLeaf);
1359 this.displayedIndices = [];
1361 this.drawLeafsOnePage();
1364 //prepareThumbnailView()
1365 //______________________________________________________________________________
1366 BookReader.prototype.prepareThumbnailView = function() {
1368 $('#BRcontainer').empty();
1369 $('#BRcontainer').css({
1370 overflowY: 'scroll',
1374 $("#BRcontainer").append("<div id='BRpageview'></div>");
1376 // $$$ keep select enabled for now since disabling it breaks keyboard
1377 // nav in FF 3.6 (https://bugs.edge.launchpad.net/bookreader/+bug/544666)
1378 // BookReader.util.disableSelect($('#BRpageview'));
1380 var startLeaf = this.currentIndex();
1381 this.thumbWidth = this.getThumbnailWidth(this.thumbColumns);
1382 this.reduce = this.getPageWidth(0)/this.thumbWidth;
1384 this.resizePageView();
1386 this.displayedRows = [];
1388 // $$$ resizePageView will do a delayed load -- this will make it happen faster
1389 this.drawLeafsThumbnail();
1392 // prepareTwoPageView()
1393 //______________________________________________________________________________
1394 // Some decisions about two page view:
1396 // Both pages will be displayed at the same height, even if they were different physical/scanned
1397 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
1398 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
1399 // aspect ratio to determine the height.
1401 // The two page view div is resized to keep the middle of the book in the middle of the div
1402 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the BRcontent
1403 // div requires adjusting the offset of BRtwpageview and/or scrolling in BRcontent.
1404 BookReader.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
1405 $('#BRcontainer').empty();
1406 $('#BRcontainer').css('overflow', 'auto');
1408 // We want to display two facing pages. We may be missing
1409 // one side of the spread because it is the first/last leaf,
1410 // foldouts, missing pages, etc
1412 //var targetLeaf = this.displayedIndices[0];
1413 var targetLeaf = this.firstIndex;
1415 if (targetLeaf < this.firstDisplayableIndex()) {
1416 targetLeaf = this.firstDisplayableIndex();
1419 if (targetLeaf > this.lastDisplayableIndex()) {
1420 targetLeaf = this.lastDisplayableIndex();
1423 //this.twoPage.currentIndexL = null;
1424 //this.twoPage.currentIndexR = null;
1425 //this.pruneUnusedImgs();
1427 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1428 this.twoPage.currentIndexL = currentSpreadIndices[0];
1429 this.twoPage.currentIndexR = currentSpreadIndices[1];
1430 this.firstIndex = this.twoPage.currentIndexL;
1432 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1434 this.pruneUnusedImgs();
1435 this.prefetch(); // Preload images or reload if scaling has changed
1437 //console.dir(this.twoPage);
1439 // Add the two page view
1440 // $$$ Can we get everything set up and then append?
1441 $('#BRcontainer').append('<div id="BRtwopageview"></div>');
1443 // $$$ calculate first then set
1444 $('#BRtwopageview').css( {
1445 height: this.twoPage.totalHeight + 'px',
1446 width: this.twoPage.totalWidth + 'px',
1447 position: 'absolute'
1450 // If there will not be scrollbars (e.g. when zooming out) we center the book
1451 // since otherwise the book will be stuck off-center
1452 if (this.twoPage.totalWidth < $('#BRcontainer').attr('clientWidth')) {
1453 centerPercentageX = 0.5;
1455 if (this.twoPage.totalHeight < $('#BRcontainer').attr('clientHeight')) {
1456 centerPercentageY = 0.5;
1459 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1461 this.twoPage.coverDiv = document.createElement('div');
1462 $(this.twoPage.coverDiv).attr('id', 'BRbookcover').css({
1463 border: '1px solid rgb(68, 25, 17)',
1464 width: this.twoPage.bookCoverDivWidth + 'px',
1465 height: this.twoPage.bookCoverDivHeight+'px',
1466 visibility: 'visible',
1467 position: 'absolute',
1468 backgroundColor: '#663929',
1469 left: this.twoPage.bookCoverDivLeft + 'px',
1470 top: this.twoPage.bookCoverDivTop+'px',
1471 MozBorderRadiusTopleft: '7px',
1472 MozBorderRadiusTopright: '7px',
1473 MozBorderRadiusBottomright: '7px',
1474 MozBorderRadiusBottomleft: '7px'
1475 }).appendTo('#BRtwopageview');
1477 this.leafEdgeR = document.createElement('div');
1478 this.leafEdgeR.className = 'leafEdgeR'; // $$$ the static CSS should be moved into the .css file
1479 $(this.leafEdgeR).css({
1480 borderStyle: 'solid solid solid none',
1481 borderColor: 'rgb(51, 51, 34)',
1482 borderWidth: '1px 1px 1px 0px',
1483 background: 'transparent url(' + this.imagesBaseURL + 'right_edges.png) repeat scroll 0% 0%',
1484 width: this.twoPage.leafEdgeWidthR + 'px',
1485 height: this.twoPage.height-1 + 'px',
1487 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1488 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1489 position: 'absolute'
1490 }).appendTo('#BRtwopageview');
1492 this.leafEdgeL = document.createElement('div');
1493 this.leafEdgeL.className = 'leafEdgeL';
1494 $(this.leafEdgeL).css({ // $$$ static CSS should be moved to file
1495 borderStyle: 'solid none solid solid',
1496 borderColor: 'rgb(51, 51, 34)',
1497 borderWidth: '1px 0px 1px 1px',
1498 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1499 width: this.twoPage.leafEdgeWidthL + 'px',
1500 height: this.twoPage.height-1 + 'px',
1501 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1502 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1503 position: 'absolute'
1504 }).appendTo('#BRtwopageview');
1506 div = document.createElement('div');
1507 $(div).attr('id', 'BRbookspine').css({
1508 border: '1px solid rgb(68, 25, 17)',
1509 width: this.twoPage.bookSpineDivWidth+'px',
1510 height: this.twoPage.bookSpineDivHeight+'px',
1511 position: 'absolute',
1512 backgroundColor: 'rgb(68, 25, 17)',
1513 left: this.twoPage.bookSpineDivLeft+'px',
1514 top: this.twoPage.bookSpineDivTop+'px'
1515 }).appendTo('#BRtwopageview');
1517 var self = this; // for closure
1519 /* Flip areas no longer used
1520 this.twoPage.leftFlipArea = document.createElement('div');
1521 this.twoPage.leftFlipArea.className = 'BRfliparea';
1522 $(this.twoPage.leftFlipArea).attr('id', 'BRleftflip').css({
1524 width: this.twoPageFlipAreaWidth() + 'px',
1525 height: this.twoPageFlipAreaHeight() + 'px',
1526 position: 'absolute',
1527 left: this.twoPageLeftFlipAreaLeft() + 'px',
1528 top: this.twoPageFlipAreaTop() + 'px',
1531 }).bind('click', function(e) {
1533 }).bind('mousedown', function(e) {
1535 }).appendTo('#BRtwopageview');
1537 this.twoPage.rightFlipArea = document.createElement('div');
1538 this.twoPage.rightFlipArea.className = 'BRfliparea';
1539 $(this.twoPage.rightFlipArea).attr('id', 'BRrightflip').css({
1541 width: this.twoPageFlipAreaWidth() + 'px',
1542 height: this.twoPageFlipAreaHeight() + 'px',
1543 position: 'absolute',
1544 left: this.twoPageRightFlipAreaLeft() + 'px',
1545 top: this.twoPageFlipAreaTop() + 'px',
1548 }).bind('click', function(e) {
1550 }).bind('mousedown', function(e) {
1552 }).appendTo('#BRtwopageview');
1555 this.prepareTwoPagePopUp();
1557 this.displayedIndices = [];
1559 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1560 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1562 this.drawLeafsTwoPage();
1563 this.updateToolbarZoom(this.reduce);
1567 this.removeSearchHilites();
1568 this.updateSearchHilites();
1572 // prepareTwoPagePopUp()
1574 // This function prepares the "View Page n" popup that shows while the mouse is
1575 // over the left/right "stack of sheets" edges. It also binds the mouse
1576 // events for these divs.
1577 //______________________________________________________________________________
1578 BookReader.prototype.prepareTwoPagePopUp = function() {
1580 this.twoPagePopUp = document.createElement('div');
1581 $(this.twoPagePopUp).css({
1582 border: '1px solid black',
1584 position: 'absolute',
1585 fontFamily: 'sans-serif',
1588 backgroundColor: 'rgb(255, 255, 238)',
1590 }).appendTo('#BRcontainer');
1591 $(this.twoPagePopUp).hide();
1593 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1594 $(e.data.twoPagePopUp).show();
1597 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1598 $(e.data.twoPagePopUp).hide();
1601 $(this.leafEdgeL).bind('click', this, function(e) {
1603 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1604 e.data.jumpToIndex(jumpIndex);
1607 $(this.leafEdgeR).bind('click', this, function(e) {
1609 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1610 e.data.jumpToIndex(jumpIndex);
1613 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1615 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1616 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1618 // $$$ TODO: Make sure popup is positioned so that it is in view
1619 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1620 $(e.data.twoPagePopUp).css({
1621 left: e.pageX- $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() + 20 + 'px',
1622 top: e.pageY - $('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1626 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1628 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1629 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1631 // $$$ TODO: Make sure popup is positioned so that it is in view
1632 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1633 $(e.data.twoPagePopUp).css({
1634 left: e.pageX - $('#BRcontainer').offset().left + $('#BRcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1635 top: e.pageY-$('#BRcontainer').offset().top + $('#BRcontainer').scrollTop() + 'px'
1640 // calculateSpreadSize()
1641 //______________________________________________________________________________
1642 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1643 // this.twoPage.currentIndexR
1644 // This function sets this.twoPage.height, twoPage.width
1646 BookReader.prototype.calculateSpreadSize = function() {
1648 var firstIndex = this.twoPage.currentIndexL;
1649 var secondIndex = this.twoPage.currentIndexR;
1650 //console.log('first page is ' + firstIndex);
1652 // Calculate page sizes and total leaf width
1654 if ( this.twoPage.autofit) {
1655 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1657 // set based on reduction factor
1658 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1661 // Both pages together
1662 this.twoPage.height = spreadSize.height;
1663 this.twoPage.width = spreadSize.width;
1666 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1667 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1670 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1671 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1672 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1676 // The width of the book cover div. The combined width of both pages, twice the width
1677 // of the book cover internal padding (2*10) and the page edges
1678 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1679 // The height of the book cover div
1680 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1683 // We calculate the total width and height for the div so that we can make the book
1685 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1686 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1687 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1688 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1689 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1690 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1692 // We want to minimize the unused space in two-up mode (maximize the amount of page
1693 // shown). We give width to the leaf edges and these widths change (though the sum
1694 // of the two remains constant) as we flip through the book. With the book
1695 // cover centered and fixed in the BRcontainer div the page images will meet
1696 // at the "gutter" which is generally offset from the center.
1697 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1698 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1700 // The left edge of the book cover moves depending on the width of the pages
1701 // $$$ change to getter
1702 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1703 // The top edge of the book cover stays a fixed distance from the top
1704 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1707 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1708 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1709 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1712 this.reduce = spreadSize.reduce; // $$$ really set this here?
1715 BookReader.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1718 // We check which page is closest to a "normal" page and use that to set the height
1719 // for both pages. This means that foldouts and other odd size pages will be displayed
1720 // smaller than the nominal zoom amount.
1721 var canon5Dratio = 1.5;
1724 height: this._getPageHeight(firstIndex),
1725 width: this._getPageWidth(firstIndex)
1729 height: this._getPageHeight(secondIndex),
1730 width: this._getPageWidth(secondIndex)
1733 var firstIndexRatio = first.height / first.width;
1734 var secondIndexRatio = second.height / second.width;
1735 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1738 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1739 ratio = firstIndexRatio;
1740 //console.log('using firstIndexRatio ' + ratio);
1742 ratio = secondIndexRatio;
1743 //console.log('using secondIndexRatio ' + ratio);
1746 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1747 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1);
1748 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1750 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1751 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1753 ideal.width = ($('#BRcontainer').width() - widthOutsidePages) >> 1;
1754 ideal.width -= 10; // $$$ fudge factor
1755 ideal.height = $('#BRcontainer').height() - heightOutsidePages;
1756 ideal.height -= 20; // fudge factor
1757 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1759 if (ideal.height/ratio <= ideal.width) {
1761 ideal.width = parseInt(ideal.height/ratio);
1764 ideal.height = parseInt(ideal.width*ratio);
1767 // $$$ check this logic with large spreads
1768 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1773 // getSpreadSizeFromReduce()
1774 //______________________________________________________________________________
1775 // Returns the spread size calculated from the reduction factor for the given pages
1776 BookReader.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1777 var spreadSize = {};
1778 // $$$ Scale this based on reduce?
1779 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1780 var maxLeafEdgeWidth = parseInt($('#BRcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1781 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1783 // $$$ Possibly incorrect -- we should make height "dominant"
1784 var nativeWidth = this._getPageWidth(firstIndex) + this._getPageWidth(secondIndex);
1785 var nativeHeight = this._getPageHeight(firstIndex) + this._getPageHeight(secondIndex);
1786 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1787 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1788 spreadSize.reduce = reduce;
1793 // twoPageGetAutofitReduce()
1794 //______________________________________________________________________________
1795 // Returns the current ideal reduction factor
1796 BookReader.prototype.twoPageGetAutofitReduce = function() {
1797 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1798 return spreadSize.reduce;
1801 // twoPageSetCursor()
1802 //______________________________________________________________________________
1803 // Set the cursor for two page view
1804 BookReader.prototype.twoPageSetCursor = function() {
1805 // console.log('setting cursor');
1806 if ( ($('#BRtwopageview').width() > $('#BRcontainer').attr('clientWidth')) ||
1807 ($('#BRtwopageview').height() > $('#BRcontainer').attr('clientHeight')) ) {
1808 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1809 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1811 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1812 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1817 //______________________________________________________________________________
1818 // Returns the currently active index.
1819 BookReader.prototype.currentIndex = function() {
1820 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1821 if (this.mode == this.constMode1up || this.mode == this.constModeThumb) {
1822 return this.firstIndex; // $$$ TODO page in center of view would be better
1823 } else if (this.mode == this.constMode2up) {
1824 // Only allow indices that are actually present in book
1825 return BookReader.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
1827 throw 'currentIndex called for unimplemented mode ' + this.mode;
1832 //______________________________________________________________________________
1833 // Flip the right page over onto the left
1834 BookReader.prototype.right = function() {
1835 if ('rl' != this.pageProgression) {
1845 //______________________________________________________________________________
1846 // Flip to the rightmost page
1847 BookReader.prototype.rightmost = function() {
1848 if ('rl' != this.pageProgression) {
1856 //______________________________________________________________________________
1857 // Flip the left page over onto the right.
1858 BookReader.prototype.left = function() {
1859 if ('rl' != this.pageProgression) {
1869 //______________________________________________________________________________
1870 // Flip to the leftmost page
1871 BookReader.prototype.leftmost = function() {
1872 if ('rl' != this.pageProgression) {
1880 //______________________________________________________________________________
1881 BookReader.prototype.next = function() {
1882 if (2 == this.mode) {
1884 this.flipFwdToIndex(null);
1886 if (this.firstIndex < this.lastDisplayableIndex()) {
1887 this.jumpToIndex(this.firstIndex+1);
1893 //______________________________________________________________________________
1894 BookReader.prototype.prev = function() {
1895 if (2 == this.mode) {
1897 this.flipBackToIndex(null);
1899 if (this.firstIndex >= 1) {
1900 this.jumpToIndex(this.firstIndex-1);
1905 BookReader.prototype.first = function() {
1906 this.jumpToIndex(this.firstDisplayableIndex());
1909 BookReader.prototype.last = function() {
1910 this.jumpToIndex(this.lastDisplayableIndex());
1914 //______________________________________________________________________________
1915 // Scrolls down one screen view
1916 BookReader.prototype.scrollDown = function() {
1917 if ($.inArray(this.mode, [this.constMode2up, this.constModeThumb])) {
1918 $('#BRcontainer').animate(
1919 { scrollTop: '+=' + $('#BRcontainer').height() * 0.95 + 'px'},
1920 450, 'easeInOutQuint'
1929 //______________________________________________________________________________
1930 // Scrolls up one screen view
1931 BookReader.prototype.scrollUp = function() {
1932 if ($.inArray(this.mode, [this.constMode2up, this.constModeThumb])) {
1933 $('#BRcontainer').animate(
1934 { scrollTop: '-=' + $('#BRcontainer').height() * 0.95 + 'px'},
1935 450, 'easeInOutQuint'
1944 // flipBackToIndex()
1945 //______________________________________________________________________________
1946 // to flip back one spread, pass index=null
1947 BookReader.prototype.flipBackToIndex = function(index) {
1949 if (1 == this.mode) return;
1951 var leftIndex = this.twoPage.currentIndexL;
1953 if (this.animating) return;
1955 if (null != this.leafEdgeTmp) {
1956 alert('error: leafEdgeTmp should be null!');
1960 if (null == index) {
1961 index = leftIndex-2;
1963 //if (index<0) return;
1965 var previousIndices = this.getSpreadIndices(index);
1967 if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
1971 this.animating = true;
1973 if ('rl' != this.pageProgression) {
1974 // Assume LTR and we are going backward
1975 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1976 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
1978 // RTL and going backward
1979 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1980 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
1984 // flipLeftToRight()
1985 //______________________________________________________________________________
1986 // Flips the page on the left towards the page on the right
1987 BookReader.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
1989 var leftLeaf = this.twoPage.currentIndexL;
1991 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1992 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1993 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
1995 var currWidthL = this.getPageWidth2UP(leftLeaf);
1996 var newWidthL = this.getPageWidth2UP(newIndexL);
1997 var newWidthR = this.getPageWidth2UP(newIndexR);
1999 var top = this.twoPageTop();
2000 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
2002 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
2003 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
2005 //animation strategy:
2006 // 0. remove search highlight, if any.
2007 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
2008 // of the left leaf and where the user clicked in the leaf edge.
2009 // Note that if this function was triggered by left() and not a
2010 // mouse click, the width of leafEdgeTmp is very small (zero px).
2011 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
2012 // leftLeaf to width=0.
2013 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
2014 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
2015 // its new full width.
2016 // 4. After step 3 is finished, do the following:
2017 // - remove leafEdgeTmp from the dom.
2018 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
2019 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
2020 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
2021 // and width=newLeafEdgeWidthL.
2022 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
2023 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
2024 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
2025 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
2026 // - prefetch new adjacent leafs.
2027 // - set up click handlers for both new left and right leafs.
2028 // - redraw the search highlight.
2029 // - update the pagenum box and the url.
2032 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
2034 this.leafEdgeTmp = document.createElement('div');
2035 $(this.leafEdgeTmp).css({
2036 borderStyle: 'solid none solid solid',
2037 borderColor: 'rgb(51, 51, 34)',
2038 borderWidth: '1px 0px 1px 1px',
2039 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
2040 width: leafEdgeTmpW + 'px',
2041 height: this.twoPage.height-1 + 'px',
2042 left: leftEdgeTmpLeft + 'px',
2044 position: 'absolute',
2046 }).appendTo('#BRtwopageview');
2048 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
2049 $(this.leafEdgeL).css({
2050 width: newLeafEdgeWidthL+'px',
2051 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
2054 // Left gets the offset of the current left leaf from the document
2055 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
2056 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
2057 var right = $('#BRtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#BRtwopageview').offset().left-2+'px';
2059 // We change the left leaf to right positioning
2060 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
2061 $(this.prefetchedImgs[leftLeaf]).css({
2066 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
2067 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
2071 this.removeSearchHilites();
2073 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
2074 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
2076 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
2077 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
2079 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
2080 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
2081 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
2083 $(self.leafEdgeR).css({
2084 // Moves the right leaf edge
2085 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
2086 left: gutter+newWidthR+'px'
2089 $(self.leafEdgeL).css({
2090 // Moves and resizes the left leaf edge
2091 width: newLeafEdgeWidthL+'px',
2092 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2095 // Resizes the brown border div
2096 $(self.twoPage.coverDiv).css({
2097 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2098 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
2101 $(self.leafEdgeTmp).remove();
2102 self.leafEdgeTmp = null;
2104 // $$$ TODO refactor with opposite direction flip
2106 self.twoPage.currentIndexL = newIndexL;
2107 self.twoPage.currentIndexR = newIndexR;
2108 self.twoPage.scaledWL = newWidthL;
2109 self.twoPage.scaledWR = newWidthR;
2110 self.twoPage.gutter = gutter;
2112 self.firstIndex = self.twoPage.currentIndexL;
2113 self.displayedIndices = [newIndexL, newIndexR];
2114 self.pruneUnusedImgs();
2116 self.animating = false;
2118 self.updateSearchHilites2UP();
2119 self.updatePageNumBox2UP();
2121 // self.twoPagePlaceFlipAreas(); // No longer used
2122 self.setMouseHandlers2UP();
2123 self.twoPageSetCursor();
2125 if (self.animationFinishedCallback) {
2126 self.animationFinishedCallback();
2127 self.animationFinishedCallback = null;
2135 //______________________________________________________________________________
2136 // Whether we flip left or right is dependent on the page progression
2137 // to flip forward one spread, pass index=null
2138 BookReader.prototype.flipFwdToIndex = function(index) {
2140 if (this.animating) return;
2142 if (null != this.leafEdgeTmp) {
2143 alert('error: leafEdgeTmp should be null!');
2147 if (null == index) {
2148 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
2150 if (index > this.lastDisplayableIndex()) return;
2152 this.animating = true;
2154 var nextIndices = this.getSpreadIndices(index);
2156 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
2158 if ('rl' != this.pageProgression) {
2159 // We did not specify RTL
2160 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
2161 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
2164 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
2165 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
2169 // flipRightToLeft(nextL, nextR, gutter)
2170 // $$$ better not to have to pass gutter in
2171 //______________________________________________________________________________
2172 // Flip from left to right and show the nextL and nextR indices on those sides
2173 BookReader.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
2174 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
2175 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
2176 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
2177 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
2179 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
2181 var top = this.twoPageTop();
2182 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
2184 var middle = this.twoPage.middle;
2185 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
2187 this.leafEdgeTmp = document.createElement('div');
2188 $(this.leafEdgeTmp).css({
2189 borderStyle: 'solid none solid solid',
2190 borderColor: 'rgb(51, 51, 34)',
2191 borderWidth: '1px 0px 1px 1px',
2192 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
2193 width: leafEdgeTmpW + 'px',
2194 height: this.twoPage.height-1 + 'px',
2195 left: gutter+scaledW+'px',
2197 position: 'absolute',
2199 }).appendTo('#BRtwopageview');
2201 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
2202 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
2204 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
2205 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
2206 var newWidthL = this.getPageWidth2UP(newIndexL);
2207 var newWidthR = this.getPageWidth2UP(newIndexR);
2209 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
2211 var self = this; // closure-tastic!
2213 var speed = this.flipSpeed;
2215 this.removeSearchHilites();
2217 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
2218 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
2219 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
2220 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
2221 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
2223 $(self.leafEdgeL).css({
2224 width: newLeafEdgeWidthL+'px',
2225 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
2228 // Resizes the book cover
2229 $(self.twoPage.coverDiv).css({
2230 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
2231 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
2234 $(self.leafEdgeTmp).remove();
2235 self.leafEdgeTmp = null;
2237 self.twoPage.currentIndexL = newIndexL;
2238 self.twoPage.currentIndexR = newIndexR;
2239 self.twoPage.scaledWL = newWidthL;
2240 self.twoPage.scaledWR = newWidthR;
2241 self.twoPage.gutter = gutter;
2243 self.firstIndex = self.twoPage.currentIndexL;
2244 self.displayedIndices = [newIndexL, newIndexR];
2245 self.pruneUnusedImgs();
2247 self.animating = false;
2250 self.updateSearchHilites2UP();
2251 self.updatePageNumBox2UP();
2253 // self.twoPagePlaceFlipAreas(); // No longer used
2254 self.setMouseHandlers2UP();
2255 self.twoPageSetCursor();
2257 if (self.animationFinishedCallback) {
2258 self.animationFinishedCallback();
2259 self.animationFinishedCallback = null;
2265 // setMouseHandlers2UP
2266 //______________________________________________________________________________
2267 BookReader.prototype.setMouseHandlers2UP = function() {
2269 $(this.prefetchedImgs[this.twoPage.currentIndexL]).bind('dblclick', function() {
2274 $(this.prefetchedImgs[this.twoPage.currentIndexR]).bind('dblclick', function() {
2281 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL] );
2282 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
2289 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR] );
2290 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
2293 e.data.self.right();
2299 //______________________________________________________________________________
2300 BookReader.prototype.prefetchImg = function(index) {
2301 var pageURI = this._getPageURI(index);
2303 // Load image if not loaded or URI has changed (e.g. due to scaling)
2304 var loadImage = false;
2305 if (undefined == this.prefetchedImgs[index]) {
2306 //console.log('no image for ' + index);
2308 } else if (pageURI != this.prefetchedImgs[index].uri) {
2309 //console.log('uri changed for ' + index);
2314 //console.log('prefetching ' + index);
2315 var img = document.createElement("img");
2317 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
2318 this.prefetchedImgs[index] = img;
2323 // prepareFlipLeftToRight()
2325 //______________________________________________________________________________
2327 // Prepare to flip the left page towards the right. This corresponds to moving
2328 // backward when the page progression is left to right.
2329 BookReader.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
2331 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
2333 this.prefetchImg(prevL);
2334 this.prefetchImg(prevR);
2336 var height = this._getPageHeight(prevL);
2337 var width = this._getPageWidth(prevL);
2338 var middle = this.twoPage.middle;
2339 var top = this.twoPageTop();
2340 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
2342 // The gutter is the dividing line between the left and right pages.
2343 // It is offset from the middle to create the illusion of thickness to the pages
2344 var gutter = middle + this.gutterOffsetForIndex(prevL);
2346 //console.log(' gutter for ' + prevL + ' is ' + gutter);
2347 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
2348 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
2351 position: 'absolute',
2352 left: gutter-scaledW+'px',
2353 right: '', // clear right property
2355 height: this.twoPage.height,
2356 width: scaledW+'px',
2357 backgroundColor: this.getPageBackgroundColor(prevL),
2358 borderRight: '1px solid black',
2362 $(this.prefetchedImgs[prevL]).css(leftCSS);
2364 $('#BRtwopageview').append(this.prefetchedImgs[prevL]);
2366 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
2369 position: 'absolute',
2373 height: this.twoPage.height,
2375 backgroundColor: this.getPageBackgroundColor(prevR),
2376 borderLeft: '1px solid black',
2380 $(this.prefetchedImgs[prevR]).css(rightCSS);
2382 $('#BRtwopageview').append(this.prefetchedImgs[prevR]);
2386 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
2387 // prepareFlipRightToLeft()
2388 //______________________________________________________________________________
2389 BookReader.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
2391 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
2394 this.prefetchImg(nextL);
2395 this.prefetchImg(nextR);
2397 var height = this._getPageHeight(nextR);
2398 var width = this._getPageWidth(nextR);
2399 var middle = this.twoPage.middle;
2400 var top = this.twoPageTop();
2401 var scaledW = this.twoPage.height*width/height;
2403 var gutter = middle + this.gutterOffsetForIndex(nextL);
2405 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
2406 $(this.prefetchedImgs[nextR]).css({
2407 position: 'absolute',
2410 backgroundColor: this.getPageBackgroundColor(nextR),
2411 height: this.twoPage.height,
2412 width: scaledW+'px',
2413 borderLeft: '1px solid black',
2417 $('#BRtwopageview').append(this.prefetchedImgs[nextR]);
2419 height = this._getPageHeight(nextL);
2420 width = this._getPageWidth(nextL);
2421 scaledW = this.twoPage.height*width/height;
2423 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#BRcontainer').width()-gutter);
2424 $(this.prefetchedImgs[nextL]).css({
2425 position: 'absolute',
2426 right: $('#BRtwopageview').attr('clientWidth')-gutter+'px',
2428 backgroundColor: this.getPageBackgroundColor(nextL),
2429 height: this.twoPage.height,
2430 width: 0+'px', // Start at 0 width, then grow to the left
2431 borderRight: '1px solid black',
2435 $('#BRtwopageview').append(this.prefetchedImgs[nextL]);
2439 // getNextLeafs() -- NOT RTL AWARE
2440 //______________________________________________________________________________
2441 // BookReader.prototype.getNextLeafs = function(o) {
2442 // //TODO: we might have two left or two right leafs in a row (damaged book)
2443 // //For now, assume that leafs are contiguous.
2445 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2446 // o.L = this.twoPage.currentIndexL+2;
2447 // o.R = this.twoPage.currentIndexL+3;
2450 // getprevLeafs() -- NOT RTL AWARE
2451 //______________________________________________________________________________
2452 // BookReader.prototype.getPrevLeafs = function(o) {
2453 // //TODO: we might have two left or two right leafs in a row (damaged book)
2454 // //For now, assume that leafs are contiguous.
2456 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2457 // o.L = this.twoPage.currentIndexL-2;
2458 // o.R = this.twoPage.currentIndexL-1;
2461 // pruneUnusedImgs()
2462 //______________________________________________________________________________
2463 BookReader.prototype.pruneUnusedImgs = function() {
2464 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2465 for (var key in this.prefetchedImgs) {
2466 //console.log('key is ' + key);
2467 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2468 //console.log('removing key '+ key);
2469 $(this.prefetchedImgs[key]).remove();
2471 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2472 //console.log('deleting key '+ key);
2473 delete this.prefetchedImgs[key];
2479 //______________________________________________________________________________
2480 BookReader.prototype.prefetch = function() {
2482 // $$$ We should check here if the current indices have finished
2483 // loading (with some timeout) before loading more page images
2484 // See https://bugs.edge.launchpad.net/bookreader/+bug/511391
2486 // prefetch visible pages first
2487 this.prefetchImg(this.twoPage.currentIndexL);
2488 this.prefetchImg(this.twoPage.currentIndexR);
2490 var adjacentPagesToLoad = 3;
2492 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2493 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2495 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2496 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2498 // Load images spreading out from current
2499 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2500 var goingDown = lowCurrent - i;
2501 if (goingDown >= start) {
2502 this.prefetchImg(goingDown);
2504 var goingUp = highCurrent + i;
2505 if (goingUp <= end) {
2506 this.prefetchImg(goingUp);
2511 var lim = this.twoPage.currentIndexL-4;
2513 lim = Math.max(lim, 0);
2514 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2515 this.prefetchImg(i);
2518 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2519 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2520 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2521 this.prefetchImg(i);
2527 // getPageWidth2UP()
2528 //______________________________________________________________________________
2529 BookReader.prototype.getPageWidth2UP = function(index) {
2530 // We return the width based on the dominant height
2531 var height = this._getPageHeight(index);
2532 var width = this._getPageWidth(index);
2533 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2537 //______________________________________________________________________________
2538 BookReader.prototype.search = function(term) {
2539 term = term.replace(/\//g, ' '); // strip slashes
2540 this.searchTerm = term;
2541 $('#BookReaderSearchScript').remove();
2542 var script = document.createElement("script");
2543 script.setAttribute('id', 'BookReaderSearchScript');
2544 script.setAttribute("type", "text/javascript");
2545 script.setAttribute("src", 'http://'+this.server+'/BookReader/flipbook_search_br.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=br.BRSearchCallback');
2546 document.getElementsByTagName('head')[0].appendChild(script);
2547 $('#BookReaderSearchBox').val(term);
2548 $('#BookReaderSearchResults').html('Searching...');
2551 // BRSearchCallback()
2552 //______________________________________________________________________________
2553 BookReader.prototype.BRSearchCallback = function(txt) {
2555 if (jQuery.browser.msie) {
2556 var dom=new ActiveXObject("Microsoft.XMLDOM");
2560 var parser = new DOMParser();
2561 var dom = parser.parseFromString(txt, "text/xml");
2564 $('#BookReaderSearchResults').empty();
2565 $('#BookReaderSearchResults').append('<ul>');
2567 for (var key in this.searchResults) {
2568 if (null != this.searchResults[key].div) {
2569 $(this.searchResults[key].div).remove();
2571 delete this.searchResults[key];
2574 var pages = dom.getElementsByTagName('PAGE');
2576 if (0 == pages.length) {
2577 // $$$ it would be nice to echo the (sanitized) search result here
2578 $('#BookReaderSearchResults').append('<li>No search results found</li>');
2580 for (var i = 0; i < pages.length; i++){
2581 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2584 var re = new RegExp (/_(\d{4})\.djvu/);
2585 var reMatch = re.exec(pages[i].getAttribute('file'));
2586 var index = parseInt(reMatch[1], 10);
2587 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2589 var children = pages[i].childNodes;
2591 for (var j=0; j<children.length; j++) {
2592 //console.log(j + ' - ' + children[j].nodeName);
2593 //console.log(children[j].firstChild.nodeValue);
2594 if ('CONTEXT' == children[j].nodeName) {
2595 context += children[j].firstChild.nodeValue;
2596 } else if ('WORD' == children[j].nodeName) {
2597 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2599 var index = this.leafNumToIndex(index);
2600 if (null != index) {
2601 //coordinates are [left, bottom, right, top, [baseline]]
2602 //we'll skip baseline for now...
2603 var coords = children[j].getAttribute('coords').split(',',4);
2604 if (4 == coords.length) {
2605 this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
2610 var pageName = this.getPageName(index);
2611 var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
2612 var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
2613 //TODO: remove hardcoded instance name
2614 $('#BookReaderSearchResults').append('<li><b><a href="javascript:br.jumpToIndex('+index+','+middleX+','+middleY+');">' + pageName + '</a></b> - ' + context + '</li>');
2617 $('#BookReaderSearchResults').append('</ul>');
2619 // $$$ update again for case of loading search URL in new browser window (search box may not have been ready yet)
2620 $('#BookReaderSearchBox').val(this.searchTerm);
2622 this.updateSearchHilites();
2625 // updateSearchHilites()
2626 //______________________________________________________________________________
2627 BookReader.prototype.updateSearchHilites = function() {
2628 if (2 == this.mode) {
2629 this.updateSearchHilites2UP();
2631 this.updateSearchHilites1UP();
2635 // showSearchHilites1UP()
2636 //______________________________________________________________________________
2637 BookReader.prototype.updateSearchHilites1UP = function() {
2639 for (var key in this.searchResults) {
2641 if (-1 != jQuery.inArray(parseInt(key), this.displayedIndices)) {
2642 var result = this.searchResults[key];
2643 if(null == result.div) {
2644 result.div = document.createElement('div');
2645 $(result.div).attr('className', 'BookReaderSearchHilite').appendTo('#pagediv'+key);
2646 //console.log('appending ' + key);
2649 width: (result.r-result.l)/this.reduce + 'px',
2650 height: (result.b-result.t)/this.reduce + 'px',
2651 left: (result.l)/this.reduce + 'px',
2652 top: (result.t)/this.reduce +'px'
2656 //console.log(key + ' not displayed');
2657 this.searchResults[key].div=null;
2663 //______________________________________________________________________________
2664 // Returns the position of the gutter (line between the page images)
2665 BookReader.prototype.twoPageGutter = function() {
2666 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2670 //______________________________________________________________________________
2671 // Returns the offset for the top of the page images
2672 BookReader.prototype.twoPageTop = function() {
2673 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2676 // twoPageCoverWidth()
2677 //______________________________________________________________________________
2678 // Returns the width of the cover div given the total page width
2679 BookReader.prototype.twoPageCoverWidth = function(totalPageWidth) {
2680 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2683 // twoPageGetViewCenter()
2684 //______________________________________________________________________________
2685 // Returns the percentage offset into twopageview div at the center of container div
2686 // { percentageX: float, percentageY: float }
2687 BookReader.prototype.twoPageGetViewCenter = function() {
2690 var containerOffset = $('#BRcontainer').offset();
2691 var viewOffset = $('#BRtwopageview').offset();
2692 center.percentageX = (containerOffset.left - viewOffset.left + ($('#BRcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2693 center.percentageY = (containerOffset.top - viewOffset.top + ($('#BRcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2698 // twoPageCenterView(percentageX, percentageY)
2699 //______________________________________________________________________________
2700 // Centers the point given by percentage from left,top of twopageview
2701 BookReader.prototype.twoPageCenterView = function(percentageX, percentageY) {
2702 if ('undefined' == typeof(percentageX)) {
2705 if ('undefined' == typeof(percentageY)) {
2709 var viewWidth = $('#BRtwopageview').width();
2710 var containerClientWidth = $('#BRcontainer').attr('clientWidth');
2711 var intoViewX = percentageX * viewWidth;
2713 var viewHeight = $('#BRtwopageview').height();
2714 var containerClientHeight = $('#BRcontainer').attr('clientHeight');
2715 var intoViewY = percentageY * viewHeight;
2717 if (viewWidth < containerClientWidth) {
2718 // Can fit width without scrollbars - center by adjusting offset
2719 $('#BRtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2721 // Need to scroll to center
2722 $('#BRtwopageview').css('left', 0);
2723 $('#BRcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2726 if (viewHeight < containerClientHeight) {
2727 // Fits with scrollbars - add offset
2728 $('#BRtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2730 $('#BRtwopageview').css('top', 0);
2731 $('#BRcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2735 // twoPageFlipAreaHeight
2736 //______________________________________________________________________________
2737 // Returns the integer height of the click-to-flip areas at the edges of the book
2738 BookReader.prototype.twoPageFlipAreaHeight = function() {
2739 return parseInt(this.twoPage.height);
2742 // twoPageFlipAreaWidth
2743 //______________________________________________________________________________
2744 // Returns the integer width of the flip areas
2745 BookReader.prototype.twoPageFlipAreaWidth = function() {
2746 var max = 100; // $$$ TODO base on view width?
2749 var width = this.twoPage.width * 0.15;
2750 return parseInt(BookReader.util.clamp(width, min, max));
2753 // twoPageFlipAreaTop
2754 //______________________________________________________________________________
2755 // Returns integer top offset for flip areas
2756 BookReader.prototype.twoPageFlipAreaTop = function() {
2757 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2760 // twoPageLeftFlipAreaLeft
2761 //______________________________________________________________________________
2762 // Left offset for left flip area
2763 BookReader.prototype.twoPageLeftFlipAreaLeft = function() {
2764 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2767 // twoPageRightFlipAreaLeft
2768 //______________________________________________________________________________
2769 // Left offset for right flip area
2770 BookReader.prototype.twoPageRightFlipAreaLeft = function() {
2771 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2774 // twoPagePlaceFlipAreas
2775 //______________________________________________________________________________
2776 // Readjusts position of flip areas based on current layout
2777 BookReader.prototype.twoPagePlaceFlipAreas = function() {
2778 // We don't set top since it shouldn't change relative to view
2779 $(this.twoPage.leftFlipArea).css({
2780 left: this.twoPageLeftFlipAreaLeft() + 'px',
2781 width: this.twoPageFlipAreaWidth() + 'px'
2783 $(this.twoPage.rightFlipArea).css({
2784 left: this.twoPageRightFlipAreaLeft() + 'px',
2785 width: this.twoPageFlipAreaWidth() + 'px'
2789 // showSearchHilites2UP()
2790 //______________________________________________________________________________
2791 BookReader.prototype.updateSearchHilites2UP = function() {
2793 for (var key in this.searchResults) {
2794 key = parseInt(key, 10);
2795 if (-1 != jQuery.inArray(key, this.displayedIndices)) {
2796 var result = this.searchResults[key];
2797 if(null == result.div) {
2798 result.div = document.createElement('div');
2799 $(result.div).attr('className', 'BookReaderSearchHilite').css('zIndex', 3).appendTo('#BRtwopageview');
2800 //console.log('appending ' + key);
2803 // We calculate the reduction factor for the specific page because it can be different
2804 // for each page in the spread
2805 var height = this._getPageHeight(key);
2806 var width = this._getPageWidth(key)
2807 var reduce = this.twoPage.height/height;
2808 var scaledW = parseInt(width*reduce);
2810 var gutter = this.twoPageGutter();
2812 if ('L' == this.getPageSide(key)) {
2813 pageL = gutter-scaledW;
2817 var pageT = this.twoPageTop();
2820 width: (result.r-result.l)*reduce + 'px',
2821 height: (result.b-result.t)*reduce + 'px',
2822 left: pageL+(result.l)*reduce + 'px',
2823 top: pageT+(result.t)*reduce +'px'
2827 //console.log(key + ' not displayed');
2828 if (null != this.searchResults[key].div) {
2829 //console.log('removing ' + key);
2830 $(this.searchResults[key].div).remove();
2832 this.searchResults[key].div=null;
2837 // removeSearchHilites()
2838 //______________________________________________________________________________
2839 BookReader.prototype.removeSearchHilites = function() {
2840 for (var key in this.searchResults) {
2841 if (null != this.searchResults[key].div) {
2842 $(this.searchResults[key].div).remove();
2843 this.searchResults[key].div=null;
2849 //______________________________________________________________________________
2850 BookReader.prototype.printPage = function() {
2851 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2853 /* iframe implementation
2855 if (null != this.printPopup) { // check if already showing
2858 this.printPopup = document.createElement("div");
2859 $(this.printPopup).css({
2860 position: 'absolute',
2862 left: ($('#BRcontainer').width()-400)/2 + 'px',
2865 border: "3px double #999999",
2867 backgroundColor: "#fff"
2868 }).appendTo('#BookReader');
2871 if (this.constMode1up == this.mode) {
2872 indexToPrint = this.firstIndex;
2874 indexToPrint = this.twoPage.currentIndexL;
2877 this.indexToPrint = indexToPrint;
2879 var htmlStr = '<div style="text-align: center;">';
2880 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>';
2881 htmlStr += '<div id="printDiv" name="printDiv" style="text-align: center; width: 233px; margin: auto">'
2882 htmlStr += '<p style="text-align:right; margin: 0; font-size: 0.85em">';
2883 //htmlStr += '<button class="BRicon rollover book_up" onclick="br.updatePrintFrame(-1); return false;"></button> ';
2884 //htmlStr += '<button class="BRicon rollover book_down" onclick="br.updatePrintFrame(1); return false;"></button>';
2885 htmlStr += '<a href="#" onclick="br.updatePrintFrame(-1); return false;">Prev</a> <a href="#" onclick="br.updatePrintFrame(1); return false;">Next</a>';
2887 htmlStr += '</div>';
2888 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.printPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2889 htmlStr += '</div>';
2891 this.printPopup.innerHTML = htmlStr;
2893 var iframe = document.createElement('iframe');
2894 iframe.id = 'printFrame';
2895 iframe.name = 'printFrame';
2896 iframe.width = '233px'; // 8.5 x 11 aspect
2897 iframe.height = '300px';
2899 var self = this; // closure
2901 $(iframe).load(function() {
2902 var doc = BookReader.util.getIFrameDocument(this);
2903 $('body', doc).html(self.getPrintFrameContent(self.indexToPrint));
2906 $('#printDiv').prepend(iframe);
2910 // Get print URI from current indices and mode
2911 BookReader.prototype.getPrintURI = function() {
2913 if (this.constMode2up == this.mode) {
2914 indexToPrint = this.twoPage.currentIndexL;
2916 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2919 var options = 'id=' + this.bookId + '&server=' + this.server + '&zip=' + this.zip
2920 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2921 + '&width=' + this._getPageWidth(indexToPrint) + '&height=' + this._getPageHeight(indexToPrint);
2923 if (this.constMode2up == this.mode) {
2924 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this._getPageWidth(this.twoPage.currentIndexR);
2925 options += '&height2=' + this._getPageHeight(this.twoPage.currentIndexR);
2926 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2928 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2931 return '/bookreader/print.php?' + options;
2934 /* iframe implementation
2935 BookReader.prototype.getPrintFrameContent = function(index) {
2936 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2937 // 8.5x11 so we should end up not overflowing on either paper size.
2938 var paperAspect = 8.5 / 11;
2939 var imageAspect = this._getPageWidth(index) / this._getPageHeight(index);
2943 // Rotate if possible and appropriate, to get larger image size on printed page
2944 if (this.canRotatePage(index)) {
2945 if (imageAspect > 1 && imageAspect > paperAspect) {
2946 // more wide than square, and more wide than paper
2948 imageAspect = 1/imageAspect;
2953 if (imageAspect > paperAspect) {
2954 // wider than paper, fit width
2955 fitAttrs = 'width="95%"';
2957 // taller than paper, fit height
2958 fitAttrs = 'height="95%"';
2961 var imageURL = this._getPageURI(index, 1, rotate);
2962 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2963 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2964 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2965 iframeStr += '</div>';
2966 iframeStr += '</body></html>';
2971 BookReader.prototype.updatePrintFrame = function(delta) {
2972 var newIndex = this.indexToPrint + delta;
2973 newIndex = BookReader.util.clamp(newIndex, 0, this.numLeafs - 1);
2974 if (newIndex == this.indexToPrint) {
2977 this.indexToPrint = newIndex;
2978 var doc = BookReader.util.getIFrameDocument($('#printFrame')[0]);
2979 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2984 //______________________________________________________________________________
2985 BookReader.prototype.showEmbedCode = function() {
2986 if (null != this.embedPopup) { // check if already showing
2990 this.embedPopup = document.createElement("div");
2991 $(this.embedPopup).css({
2992 position: 'absolute',
2994 left: ($('#BRcontainer').attr('clientWidth')-400)/2 + 'px',
2997 border: "3px double #999999",
2999 backgroundColor: "#fff"
3000 }).appendTo('#BookReader');
3002 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
3003 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>';
3004 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
3005 htmlStr += '<p style="text-align:center;"><a href="" onclick="br.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
3007 this.embedPopup.innerHTML = htmlStr;
3008 $(this.embedPopup).find('input').bind('click', function() {
3014 //______________________________________________________________________________
3015 BookReader.prototype.autoToggle = function() {
3017 var bComingFrom1up = false;
3018 if (2 != this.mode) {
3019 bComingFrom1up = true;
3023 // Change to autofit if book is too large
3024 if (this.reduce < this.twoPageGetAutofitReduce()) {
3029 if (null == this.autoTimer) {
3030 this.flipSpeed = 2000;
3032 // $$$ Draw events currently cause layout problems when they occur during animation.
3033 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
3034 // we workaround for now by not triggering immediate animation in that case.
3035 // See https://bugs.launchpad.net/gnubook/+bug/328327
3036 if (('rl' == this.pageProgression) && bComingFrom1up) {
3037 // don't flip immediately -- wait until timer fires
3040 this.flipFwdToIndex();
3043 $('#BRtoolbar .play').hide();
3044 $('#BRtoolbar .pause').show();
3045 this.autoTimer=setInterval(function(){
3046 if (self.animating) {return;}
3048 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
3049 self.flipBackToIndex(1); // $$$ really what we want?
3051 self.flipFwdToIndex();
3060 //______________________________________________________________________________
3061 // Stop autoplay mode, allowing animations to finish
3062 BookReader.prototype.autoStop = function() {
3063 if (null != this.autoTimer) {
3064 clearInterval(this.autoTimer);
3065 this.flipSpeed = 'fast';
3066 $('#BRtoolbar .pause').hide();
3067 $('#BRtoolbar .play').show();
3068 this.autoTimer = null;
3072 // stopFlipAnimations
3073 //______________________________________________________________________________
3074 // Immediately stop flip animations. Callbacks are triggered.
3075 BookReader.prototype.stopFlipAnimations = function() {
3077 this.autoStop(); // Clear timers
3079 // Stop animation, clear queue, trigger callbacks
3080 if (this.leafEdgeTmp) {
3081 $(this.leafEdgeTmp).stop(false, true);
3083 jQuery.each(this.prefetchedImgs, function() {
3084 $(this).stop(false, true);
3087 // And again since animations also queued in callbacks
3088 if (this.leafEdgeTmp) {
3089 $(this.leafEdgeTmp).stop(false, true);
3091 jQuery.each(this.prefetchedImgs, function() {
3092 $(this).stop(false, true);
3097 // keyboardNavigationIsDisabled(event)
3098 // - returns true if keyboard navigation should be disabled for the event
3099 //______________________________________________________________________________
3100 BookReader.prototype.keyboardNavigationIsDisabled = function(event) {
3101 if (event.target.tagName == "INPUT") {
3107 // gutterOffsetForIndex
3108 //______________________________________________________________________________
3110 // Returns the gutter offset for the spread containing the given index.
3111 // This function supports RTL
3112 BookReader.prototype.gutterOffsetForIndex = function(pindex) {
3114 // To find the offset of the gutter from the middle we calculate our percentage distance
3115 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
3116 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
3118 // But then again for RTL it's the opposite
3119 if ('rl' == this.pageProgression) {
3127 //______________________________________________________________________________
3128 // Returns the width of the leaf edge div for the page with index given
3129 BookReader.prototype.leafEdgeWidth = function(pindex) {
3130 // $$$ could there be single pixel rounding errors for L vs R?
3131 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
3132 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3134 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
3138 // jumpIndexForLeftEdgePageX
3139 //______________________________________________________________________________
3140 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
3141 BookReader.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
3142 if ('rl' != this.pageProgression) {
3143 // LTR - flipping backward
3144 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3146 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
3147 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
3151 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
3152 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
3157 // jumpIndexForRightEdgePageX
3158 //______________________________________________________________________________
3159 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
3160 BookReader.prototype.jumpIndexForRightEdgePageX = function(pageX) {
3161 if ('rl' != this.pageProgression) {
3163 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
3164 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
3167 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
3168 jumpIndex = BookReader.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
3173 BookReader.prototype.initToolbar = function(mode, ui) {
3175 $("#BookReader").append("<div id='BRtoolbar'>"
3176 + "<span id='BRtoolbarbuttons' style='float: right'>"
3177 + "<button class='BRicon print rollover' /> <button class='BRicon rollover embed' />"
3178 + "<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>"
3179 + "<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>"
3180 + "<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>"
3181 + "<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>"
3182 + "<button class='BRicon rollover play' /><button class='BRicon rollover pause' style='display: none' />"
3186 + "<a class='BRicon logo rollover' href='" + this.logoURL + "'> </a>"
3187 + " <button class='BRicon rollover zoom_out' onclick='br.zoom(-1); return false;'/>"
3188 + "<button class='BRicon rollover zoom_in' onclick='br.zoom(1); return false;'/>"
3189 + " <span class='label'>Zoom: <span id='BRzoom'>"+parseInt(100/this.reduce)+"</span></span>"
3190 + " <button class='BRicon rollover one_page_mode' onclick='br.switchMode(1); return false;'/>"
3191 + " <button class='BRicon rollover two_page_mode' onclick='br.switchMode(2); return false;'/>"
3192 + " <button class='BRicon rollover thumbnail_mode' onclick='br.switchMode(3); return false;'/>"
3195 + "<span id='#BRbooktitle'>"
3196 + " <a class='BRblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
3200 this.updateToolbarZoom(this.reduce); // Pretty format
3202 if (ui == "embed") {
3203 $("#BookReader a.logo").attr("target","_blank");
3206 // $$$ turn this into a member variable
3207 var jToolbar = $('#BRtoolbar'); // j prefix indicates jQuery object
3209 // We build in mode 2
3212 this.bindToolbarNavHandlers(jToolbar);
3214 // Setup tooltips -- later we could load these from a file for i18n
3215 var titles = { '.logo': 'Go to Archive.org',
3216 '.zoom_in': 'Zoom in',
3217 '.zoom_out': 'Zoom out',
3218 '.one_page_mode': 'One-page view',
3219 '.two_page_mode': 'Two-page view',
3220 '.thumbnail_mode': 'Thumbnail view',
3221 '.print': 'Print this page',
3222 '.embed': 'Embed bookreader',
3223 '.book_left': 'Flip left',
3224 '.book_right': 'Flip right',
3225 '.book_up': 'Page up',
3226 '.book_down': 'Page down',
3229 '.book_top': 'First page',
3230 '.book_bottom': 'Last page'
3232 if ('rl' == this.pageProgression) {
3233 titles['.book_leftmost'] = 'Last page';
3234 titles['.book_rightmost'] = 'First page';
3236 titles['.book_leftmost'] = 'First page';
3237 titles['.book_rightmost'] = 'Last page';
3240 for (var icon in titles) {
3241 jToolbar.find(icon).attr('title', titles[icon]);
3244 // Hide mode buttons and autoplay if 2up is not available
3245 // $$$ if we end up with more than two modes we should show the applicable buttons
3246 if ( !this.canSwitchToMode(this.constMode2up) ) {
3247 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
3250 // Switch to requested mode -- binds other click handlers
3251 this.switchToolbarMode(mode);
3256 // switchToolbarMode
3257 //______________________________________________________________________________
3258 // Update the toolbar for the given mode (changes navigation buttons)
3259 // $$$ we should soon split the toolbar out into its own module
3260 BookReader.prototype.switchToolbarMode = function(mode) {
3263 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3264 $('#BRtoolbar .BRtoolbarmode2').hide();
3265 $('#BRtoolbar .BRtoolbarmode3').hide();
3266 $('#BRtoolbar .BRtoolbarmode1').show().css('display', 'inline');
3267 } else if (2 == mode) {
3269 $('#BRtoolbar .BRtoolbarzoom').show().css('display', 'inline');
3270 $('#BRtoolbar .BRtoolbarmode1').hide();
3271 $('#BRtoolbar .BRtoolbarmode3').hide();
3272 $('#BRtoolbar .BRtoolbarmode2').show().css('display', 'inline');
3275 $('#BRtoolbar .BRtoolbarzoom').hide();
3276 $('#BRtoolbar .BRtoolbarmode2').hide();
3277 $('#BRtoolbar .BRtoolbarmode1').hide();
3278 $('#BRtoolbar .BRtoolbarmode3').show().css('display', 'inline');
3282 // bindToolbarNavHandlers
3283 //______________________________________________________________________________
3284 // Binds the toolbar handlers
3285 BookReader.prototype.bindToolbarNavHandlers = function(jToolbar) {
3287 var self = this; // closure
3289 jToolbar.find('.book_left').bind('click', function(e) {
3294 jToolbar.find('.book_right').bind('click', function(e) {
3299 jToolbar.find('.book_up').bind('click', function(e) {
3300 if ($.inArray(self.mode, [self.constMode2up, self.constModeThumb])) {
3308 jToolbar.find('.book_down').bind('click', function(e) {
3309 if ($.inArray(self.mode, [self.constMode2up, self.constModeThumb])) {
3317 jToolbar.find('.print').bind('click', function(e) {
3322 jToolbar.find('.embed').bind('click', function(e) {
3323 self.showEmbedCode();
3327 jToolbar.find('.play').bind('click', function(e) {
3332 jToolbar.find('.pause').bind('click', function(e) {
3337 jToolbar.find('.book_top').bind('click', function(e) {
3342 jToolbar.find('.book_bottom').bind('click', function(e) {
3347 jToolbar.find('.book_leftmost').bind('click', function(e) {
3352 jToolbar.find('.book_rightmost').bind('click', function(e) {
3358 // updateToolbarZoom(reduce)
3359 //______________________________________________________________________________
3360 // Update the displayed zoom factor based on reduction factor
3361 BookReader.prototype.updateToolbarZoom = function(reduce) {
3363 if (this.constMode2up == this.mode && this.twoPage.autofit) {
3366 value = (100 / reduce).toFixed(2);
3367 // Strip trailing zeroes and decimal if all zeroes
3368 value = value.replace(/0+$/,'');
3369 value = value.replace(/\.$/,'');
3372 $('#BRzoom').text(value);
3375 // firstDisplayableIndex
3376 //______________________________________________________________________________
3377 // Returns the index of the first visible page, dependent on the mode.
3378 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3379 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
3380 BookReader.prototype.firstDisplayableIndex = function() {
3381 if (this.mode != this.constMode2up) {
3385 if ('rl' != this.pageProgression) {
3387 if (this.getPageSide(0) == 'L') {
3394 if (this.getPageSide(0) == 'R') {
3402 // lastDisplayableIndex
3403 //______________________________________________________________________________
3404 // Returns the index of the last visible page, dependent on the mode.
3405 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
3406 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
3407 BookReader.prototype.lastDisplayableIndex = function() {
3409 var lastIndex = this.numLeafs - 1;
3411 if (this.mode != this.constMode2up) {
3415 if ('rl' != this.pageProgression) {
3417 if (this.getPageSide(lastIndex) == 'R') {
3420 return lastIndex + 1;
3424 if (this.getPageSide(lastIndex) == 'L') {
3427 return lastIndex + 1;
3432 // shortTitle(maximumCharacters)
3434 // Returns a shortened version of the title with the maximum number of characters
3435 BookReader.prototype.shortTitle = function(maximumCharacters) {
3436 if (this.bookTitle.length < maximumCharacters) {
3437 return this.bookTitle;
3440 var title = this.bookTitle.substr(0, maximumCharacters - 3);
3445 // Parameter related functions
3447 // updateFromParams(params)
3449 // Update ourselves from the params object.
3451 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
3452 BookReader.prototype.updateFromParams = function(params) {
3453 if ('undefined' != typeof(params.mode)) {
3454 this.switchMode(params.mode);
3458 if ('undefined' != typeof(params.searchTerm)) {
3459 if (this.searchTerm != params.searchTerm) {
3460 this.search(params.searchTerm);
3464 // $$$ process /zoom
3466 // We only respect page if index is not set
3467 if ('undefined' != typeof(params.index)) {
3468 if (params.index != this.currentIndex()) {
3469 this.jumpToIndex(params.index);
3471 } else if ('undefined' != typeof(params.page)) {
3472 // $$$ this assumes page numbers are unique
3473 if (params.page != this.getPageNum(this.currentIndex())) {
3474 this.jumpToPage(params.page);
3478 // $$$ process /region
3479 // $$$ process /highlight
3482 // paramsFromFragment(urlFragment)
3484 // Returns a object with configuration parametes from a URL fragment.
3486 // E.g paramsFromFragment(window.location.hash)
3487 BookReader.prototype.paramsFromFragment = function(urlFragment) {
3488 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
3492 // For convenience we allow an initial # character (as from window.location.hash)
3493 // but don't require it
3494 if (urlFragment.substr(0,1) == '#') {
3495 urlFragment = urlFragment.substr(1);
3498 // Simple #nn syntax
3499 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3500 if ( !isNaN(oldStyleLeafNum) ) {
3501 params.index = oldStyleLeafNum;
3503 // Done processing if using old-style syntax
3507 // Split into key-value pairs
3508 var urlArray = urlFragment.split('/');
3510 for (var i = 0; i < urlArray.length; i += 2) {
3511 urlHash[urlArray[i]] = urlArray[i+1];
3515 if ('1up' == urlHash['mode']) {
3516 params.mode = this.constMode1up;
3517 } else if ('2up' == urlHash['mode']) {
3518 params.mode = this.constMode2up;
3519 } else if ('thumb' == urlHash['mode']) {
3520 params.mode = this.constModeThumb;
3524 if ('undefined' != typeof(urlHash['page'])) {
3525 // page was set -- may not be int
3526 params.page = urlHash['page'];
3529 // $$$ process /region
3530 // $$$ process /search
3532 if (urlHash['search'] != undefined) {
3533 params.searchTerm = BookReader.util.decodeURIComponentPlus(urlHash['search']);
3536 // $$$ process /highlight
3541 // paramsFromCurrent()
3543 // Create a params object from the current parameters.
3544 BookReader.prototype.paramsFromCurrent = function() {
3548 var index = this.currentIndex();
3549 var pageNum = this.getPageNum(index);
3550 if ((pageNum === 0) || pageNum) {
3551 params.page = pageNum;
3554 params.index = index;
3555 params.mode = this.mode;
3561 if (this.searchHighlightVisible()) {
3562 params.searchTerm = this.searchTerm;
3568 // fragmentFromParams(params)
3570 // Create a fragment string from the params object.
3571 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3572 BookReader.prototype.fragmentFromParams = function(params) {
3573 var separator = '/';
3577 if ('undefined' != typeof(params.page)) {
3578 fragments.push('page', params.page);
3580 // Don't have page numbering -- use index instead
3581 fragments.push('page', 'n' + params.index);
3588 if ('undefined' != typeof(params.mode)) {
3589 if (params.mode == this.constMode1up) {
3590 fragments.push('mode', '1up');
3591 } else if (params.mode == this.constMode2up) {
3592 fragments.push('mode', '2up');
3593 } else if (params.mode == this.constModeThumb) {
3594 fragments.push('mode', 'thumb');
3596 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3601 if (params.searchTerm) {
3602 fragments.push('search', params.searchTerm);
3605 return BookReader.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3608 // getPageIndex(pageNum)
3610 // Returns the *highest* index the given page number, or undefined
3611 BookReader.prototype.getPageIndex = function(pageNum) {
3612 var pageIndices = this.getPageIndices(pageNum);
3614 if (pageIndices.length > 0) {
3615 return pageIndices[pageIndices.length - 1];
3621 // getPageIndices(pageNum)
3623 // Returns an array (possibly empty) of the indices with the given page number
3624 BookReader.prototype.getPageIndices = function(pageNum) {
3627 // Check for special "nXX" page number
3628 if (pageNum.slice(0,1) == 'n') {
3630 var pageIntStr = pageNum.slice(1, pageNum.length);
3631 var pageIndex = parseInt(pageIntStr);
3632 indices.push(pageIndex);
3635 // Do nothing... will run through page names and see if one matches
3640 for (i=0; i<this.numLeafs; i++) {
3641 if (this.getPageNum(i) == pageNum) {
3649 // getPageName(index)
3651 // Returns the name of the page as it should be displayed in the user interface
3652 BookReader.prototype.getPageName = function(index) {
3653 return 'Page ' + this.getPageNum(index);
3656 // updateLocationHash
3658 // Update the location hash from the current parameters. Call this instead of manually
3659 // using window.location.replace
3660 BookReader.prototype.updateLocationHash = function() {
3661 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3662 window.location.replace(newHash);
3664 // This is the variable checked in the timer. Only user-generated changes
3665 // to the URL will trigger the event.
3666 this.oldLocationHash = newHash;
3669 // startLocationPolling
3671 // Starts polling of window.location to see hash fragment changes
3672 BookReader.prototype.startLocationPolling = function() {
3673 var self = this; // remember who I am
3674 self.oldLocationHash = window.location.hash;
3676 if (this.locationPollId) {
3677 clearInterval(this.locationPollID);
3678 this.locationPollId = null;
3681 this.locationPollId = setInterval(function() {
3682 var newHash = window.location.hash;
3683 if (newHash != self.oldLocationHash) {
3684 if (newHash != self.oldUserHash) { // Only process new user hash once
3685 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3687 // Queue change if animating
3688 if (self.animating) {
3690 self.animationFinishedCallback = function() {
3691 self.updateFromParams(self.paramsFromFragment(newHash));
3693 } else { // update immediately
3694 self.updateFromParams(self.paramsFromFragment(newHash));
3696 self.oldUserHash = newHash;
3704 // Returns true if we can switch to the requested mode
3705 BookReader.prototype.canSwitchToMode = function(mode) {
3706 if (mode == this.constMode2up) {
3707 // check there are enough pages to display
3708 // $$$ this is a workaround for the mis-feature that we can't display
3709 // short books in 2up mode
3710 if (this.numLeafs < 6) {
3718 // searchHighlightVisible
3720 // Returns true if a search highlight is currently being displayed
3721 BookReader.prototype.searchHighlightVisible = function() {
3722 if (this.constMode2up == this.mode) {
3723 if (this.searchResults[this.twoPage.currentIndexL]
3724 || this.searchResults[this.twoPage.currentIndexR]) {
3728 if (this.searchResults[this.currentIndex()]) {
3735 // getPageBackgroundColor
3737 // Returns a CSS property string for the background color for the given page
3738 // $$$ turn into regular CSS?
3739 BookReader.prototype.getPageBackgroundColor = function(index) {
3740 if (index >= 0 && index < this.numLeafs) {
3742 return this.pageDefaultBackgroundColor;
3750 // Returns the page width for the given index, or first or last page if out of range
3751 BookReader.prototype._getPageWidth = function(index) {
3752 // Synthesize a page width for pages not actually present in book.
3753 // May or may not be the best approach.
3754 // If index is out of range we return the width of first or last page
3755 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3756 return this.getPageWidth(index);
3761 // Returns the page height for the given index, or first or last page if out of range
3762 BookReader.prototype._getPageHeight= function(index) {
3763 index = BookReader.util.clamp(index, 0, this.numLeafs - 1);
3764 return this.getPageHeight(index);
3769 // Returns the page URI or transparent image if out of range
3770 BookReader.prototype._getPageURI = function(index, reduce, rotate) {
3771 if (index < 0 || index >= this.numLeafs) { // Synthesize page
3772 return this.imagesBaseURL + "/transparent.png";
3775 if ('undefined' == typeof(reduce)) {
3776 // reduce not passed in
3777 // $$$ this probably won't work for thumbnail mode
3778 var ratio = this.getPageHeight(index) / this.twoPage.height;
3780 // $$$ we make an assumption here that the scales are available pow2 (like kakadu)
3783 } else if (ratio < 4) {
3785 } else if (ratio < 8) {
3787 } else if (ratio < 16) {
3789 } else if (ratio < 32) {
3797 return this.getPageURI(index, reduce, rotate);
3800 // Library functions
3802 disableSelect: function(jObject) {
3803 // Bind mouse handlers
3804 // Disable mouse click to avoid selected/highlighted page images - bug 354239
3805 jObject.bind('mousedown', function(e) {
3806 // $$$ check here for right-click and don't disable. Also use jQuery style
3807 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
3810 // Special hack for IE7
3811 jObject[0].onselectstart = function(e) { return false; };
3814 clamp: function(value, min, max) {
3815 return Math.min(Math.max(value, min), max);
3818 getIFrameDocument: function(iframe) {
3819 // Adapted from http://xkr.us/articles/dom/iframe-document/
3820 var outer = (iframe.contentWindow || iframe.contentDocument);
3821 return (outer.document || outer);
3824 decodeURIComponentPlus: function(value) {
3825 // Decodes a URI component and converts '+' to ' '
3826 return decodeURIComponent(value).replace(/\+/g, ' ');
3829 encodeURIComponentPlus: function(value) {
3830 // Encodes a URI component and converts ' ' to '+'
3831 return encodeURIComponent(value).replace(/%20/g, '+');
3833 // The final property here must NOT have a comma after it - IE7