2 Copyright(c)2008-2009 Internet Archive. Software license AGPL version 3.
4 This file is part of GnuBook.
6 GnuBook 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 GnuBook 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 GnuBook. If not, see <http://www.gnu.org/licenses/>.
19 The GnuBook 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():
31 // You must also add a numLeafs property before calling init().
36 this.mode = 1; //1 or 2
37 this.ui = 'full'; // UI mode
39 this.displayedIndices = [];
40 //this.indicesToDisplay = [];
42 this.prefetchedImgs = {}; //an object with numeric keys cooresponding to page index
45 this.animating = false;
47 this.autoTimer = null;
48 this.flipSpeed = 'fast';
50 this.twoPagePopUp = null;
51 this.leafEdgeTmp = null;
52 this.embedPopup = null;
53 this.printPopup = null;
56 this.searchResults = {};
58 this.firstIndex = null;
60 this.lastDisplayableIndex2up = null;
62 // We link to index.php to avoid redirect which breaks back button
63 this.logoURL = 'http://www.archive.org/index.php';
65 // Base URL for images
66 this.imagesBaseURL = '/bookreader/images/';
69 this.constMode1up = 1;
70 this.constMode2up = 2;
73 this.reductionFactors = [0.5, 1, 2, 4, 8, 16];
75 // Object to hold parameters related to 2up mode
77 coverInternalPadding: 10, // Width of cover
78 coverExternalPadding: 10, // Padding outside of cover
79 bookSpineDivWidth: 30, // Width of book spine $$$ consider sizing based on book length
83 // Background color for pages (e.g. when loading page image)
84 // $$$ TODO dynamically calculate based on page images
85 this.pageDefaultBackgroundColor = 'rgb(234, 226, 205)';
89 //______________________________________________________________________________
90 GnuBook.prototype.init = function() {
92 var startIndex = undefined;
94 // Find start index and mode if set in location hash
95 var params = this.paramsFromFragment(window.location.hash);
97 if ('undefined' != typeof(params.index)) {
98 startIndex = params.index;
99 } else if ('undefined' != typeof(params.page)) {
100 startIndex = this.getPageIndex(params.page);
103 if ('undefined' == typeof(startIndex)) {
104 if ('undefined' != typeof(this.titleLeaf)) {
105 startIndex = this.leafNumToIndex(this.titleLeaf);
109 if ('undefined' == typeof(startIndex)) {
113 if ('undefined' != typeof(params.mode)) {
114 this.mode = params.mode;
117 // Set document title -- may have already been set in enclosing html for
118 // search engine visibility
119 document.title = this.shortTitle(50);
121 // Sanitize parameters
122 if ( !this.canSwitchToMode( this.mode ) ) {
123 this.mode = this.constMode1up;
126 $("#GnuBook").empty();
127 this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
128 $("#GnuBook").append("<div id='GBcontainer'></div>");
129 $("#GBcontainer").append("<div id='GBpageview'></div>");
131 $("#GBcontainer").bind('scroll', this, function(e) {
135 this.setupKeyListeners();
136 this.startLocationPolling();
138 $(window).bind('resize', this, function(e) {
139 //console.log('resize!');
140 if (1 == e.data.mode) {
141 //console.log('centering 1page view');
142 e.data.centerPageView();
143 $('#GBpageview').empty()
144 e.data.displayedIndices = [];
145 e.data.updateSearchHilites(); //deletes hilights but does not call remove()
148 //console.log('drawing 2 page view');
150 // We only need to prepare again in autofit (size of spread changes)
151 if (e.data.twoPage.autofit) {
152 e.data.prepareTwoPageView();
154 // Re-center if the scrollbars have disappeared
155 var center = e.data.twoPageGetViewCenter();
156 var doRecenter = false;
157 if (e.data.twoPage.totalWidth < $('#GBcontainer').attr('clientWidth')) {
158 center.percentageX = 0.5;
161 if (e.data.twoPage.totalHeight < $('#GBcontainer').attr('clientHeight')) {
162 center.percentageY = 0.5;
166 e.data.twoPageCenterView(center.percentageX, center.percentageY);
172 $('.GBpagediv1up').bind('mousedown', this, function(e) {
173 // $$$ the purpose of this is to disable selection of the image (makes it turn blue)
174 // but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
177 if (1 == this.mode) {
178 this.resizePageView();
179 this.firstIndex = startIndex;
180 this.jumpToIndex(startIndex);
182 //this.resizePageView();
184 this.displayedIndices=[0];
185 this.firstIndex = startIndex;
186 this.displayedIndices = [this.firstIndex];
187 //console.log('titleLeaf: %d', this.titleLeaf);
188 //console.log('displayedIndices: %s', this.displayedIndices);
189 this.prepareTwoPageView();
192 // Enact other parts of initial params
193 this.updateFromParams(params);
196 GnuBook.prototype.setupKeyListeners = function() {
209 // We use document here instead of window to avoid a bug in jQuery on IE7
210 $(document).keydown(function(e) {
212 // Keyboard navigation
213 if (!self.keyboardNavigationIsDisabled(e)) {
217 // In 1up mode page scrolling is handled by browser
218 if (2 == self.mode) {
225 if (2 == self.mode) {
239 if (2 == self.mode) {
245 if (2 == self.mode) {
256 //______________________________________________________________________________
257 GnuBook.prototype.drawLeafs = function() {
258 if (1 == this.mode) {
259 this.drawLeafsOnePage();
261 this.drawLeafsTwoPage();
266 //______________________________________________________________________________
267 GnuBook.prototype.setDragHandler = function(div) {
268 div.dragging = false;
270 $(div).unbind('mousedown').bind('mousedown', function(e) {
273 //console.log('mousedown at ' + e.pageY);
275 this.dragging = true;
276 this.prevMouseX = e.pageX;
277 this.prevMouseY = e.pageY;
279 var startX = e.pageX;
280 var startY = e.pageY;
281 var startTop = $('#GBcontainer').attr('scrollTop');
282 var startLeft = $('#GBcontainer').attr('scrollLeft');
286 $(div).unbind('mousemove').bind('mousemove', function(ee) {
289 // console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
291 var offsetX = ee.pageX - this.prevMouseX;
292 var offsetY = ee.pageY - this.prevMouseY;
295 $('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
296 $('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
299 this.prevMouseX = ee.pageX;
300 this.prevMouseY = ee.pageY;
304 $(div).unbind('mouseup').bind('mouseup', function(ee) {
306 //console.log('mouseup');
308 this.dragging = false;
311 $(div).unbind('mouseleave').bind('mouseleave', function(e) {
313 //console.log('mouseleave');
315 this.dragging = false;
318 $(div).unbind('mouseenter').bind('mouseenter', function(e) {
320 //console.log('mouseenter');
322 this.dragging = false;
326 // setDragHandler2UP()
327 //______________________________________________________________________________
328 GnuBook.prototype.setDragHandler2UP = function(div) {
329 div.dragging = false;
331 $(div).unbind('mousedown').bind('mousedown', function(e) {
334 //console.log('mousedown at ' + e.pageY);
336 this.dragStart = {x: e.pageX, y: e.pageY };
337 this.mouseDown = true;
338 this.dragging = false; // wait until drag distance
339 this.prevMouseX = e.pageX;
340 this.prevMouseY = e.pageY;
342 var startX = e.pageX;
343 var startY = e.pageY;
344 var startTop = $('#GBcontainer').attr('scrollTop');
345 var startLeft = $('#GBcontainer').attr('scrollLeft');
349 $(div).unbind('mousemove').bind('mousemove', function(ee) {
352 // console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
354 var offsetX = ee.pageX - this.prevMouseX;
355 var offsetY = ee.pageY - this.prevMouseY;
357 var minDragDistance = 5; // $$$ constant
359 var distance = Math.max(Math.abs(offsetX), Math.abs(offsetY));
361 if (this.mouseDown && (distance > minDragDistance)) {
362 //console.log('drag start!');
364 this.dragging = true;
368 $('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
369 $('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
370 this.prevMouseX = ee.pageX;
371 this.prevMouseY = ee.pageY;
378 $(div).unbind('mouseup').bind('mouseup', function(ee) {
380 //console.log('mouseup');
382 this.dragging = false;
383 this.mouseDown = false;
388 $(div).unbind('mouseleave').bind('mouseleave', function(e) {
390 //console.log('mouseleave');
392 this.dragging = false;
393 this.mouseDown = false;
396 $(div).unbind('mouseenter').bind('mouseenter', function(e) {
398 //console.log('mouseenter');
400 this.dragging = false;
401 this.mouseDown = false;
405 GnuBook.prototype.setClickHandler2UP = function( element, data, handler) {
406 //console.log('setting handler');
407 //console.log(element.tagName);
409 $(element).unbind('click').bind('click', data, function(e) {
412 //console.log('click!');
414 if (this.mouseDown && (!this.dragging)) {
415 //console.log('click not dragging!');
419 this.dragging = false;
420 this.mouseDown = false;
424 // drawLeafsOnePage()
425 //______________________________________________________________________________
426 GnuBook.prototype.drawLeafsOnePage = function() {
427 //alert('drawing leafs!');
431 var scrollTop = $('#GBcontainer').attr('scrollTop');
432 var scrollBottom = scrollTop + $('#GBcontainer').height();
433 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
435 var indicesToDisplay = [];
440 for (i=0; i<this.numLeafs; i++) {
441 var height = parseInt(this.getPageHeight(i)/this.reduce);
443 leafBottom += height;
444 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
445 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
446 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
447 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
448 if (topInView | bottomInView | middleInView) {
449 //console.log('displayed: ' + this.displayedIndices);
450 //console.log('to display: ' + i);
451 indicesToDisplay.push(i);
453 leafTop += height +10;
457 var firstIndexToDraw = indicesToDisplay[0];
458 this.firstIndex = firstIndexToDraw;
460 // Update hash, but only if we're currently displaying a leaf
461 // Hack that fixes #365790
462 if (this.displayedIndices.length > 0) {
463 this.updateLocationHash();
466 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
468 indicesToDisplay.unshift(firstIndexToDraw);
471 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
472 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
473 indicesToDisplay.push(lastIndexToDraw+1);
478 for (i=0; i<firstIndexToDraw; i++) {
479 leafTop += parseInt(this.getPageHeight(i)/this.reduce) +10;
482 //var viewWidth = $('#GBpageview').width(); //includes scroll bar width
483 var viewWidth = $('#GBcontainer').attr('scrollWidth');
486 for (i=0; i<indicesToDisplay.length; i++) {
487 var index = indicesToDisplay[i];
488 var height = parseInt(this.getPageHeight(index)/this.reduce);
490 if(-1 == jQuery.inArray(indicesToDisplay[i], this.displayedIndices)) {
491 var width = parseInt(this.getPageWidth(index)/this.reduce);
492 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
493 var div = document.createElement("div");
494 div.className = 'GBpagediv1up';
495 div.id = 'pagediv'+index;
496 div.style.position = "absolute";
497 $(div).css('top', leafTop + 'px');
498 var left = (viewWidth-width)>>1;
499 if (left<0) left = 0;
500 $(div).css('left', left+'px');
501 $(div).css('width', width+'px');
502 $(div).css('height', height+'px');
503 //$(div).text('loading...');
505 this.setDragHandler(div);
507 $('#GBpageview').append(div);
509 var img = document.createElement("img");
510 img.src = this.getPageURI(index, this.reduce, 0);
511 $(img).css('width', width+'px');
512 $(img).css('height', height+'px');
516 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
519 leafTop += height +10;
523 for (i=0; i<this.displayedIndices.length; i++) {
524 if (-1 == jQuery.inArray(this.displayedIndices[i], indicesToDisplay)) {
525 var index = this.displayedIndices[i];
526 //console.log('Removing leaf ' + index);
527 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
528 $('#pagediv'+index).remove();
530 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
534 this.displayedIndices = indicesToDisplay.slice();
535 this.updateSearchHilites();
537 if (null != this.getPageNum(firstIndexToDraw)) {
538 $("#GBpagenum").val(this.getPageNum(this.currentIndex()));
540 $("#GBpagenum").val('');
543 this.updateToolbarZoom(this.reduce);
547 // drawLeafsTwoPage()
548 //______________________________________________________________________________
549 GnuBook.prototype.drawLeafsTwoPage = function() {
550 var scrollTop = $('#GBtwopageview').attr('scrollTop');
551 var scrollBottom = scrollTop + $('#GBtwopageview').height();
553 // $$$ we should use calculated values in this.twoPage (recalc if necessary)
555 var indexL = this.twoPage.currentIndexL;
557 var heightL = this.getPageHeight(indexL);
558 var widthL = this.getPageWidth(indexL);
560 var leafEdgeWidthL = this.leafEdgeWidth(indexL);
561 var leafEdgeWidthR = this.twoPage.edgeWidth - leafEdgeWidthL;
562 //var bookCoverDivWidth = this.twoPage.width*2 + 20 + this.twoPage.edgeWidth; // $$$ hardcoded cover width
563 var bookCoverDivWidth = this.twoPage.bookCoverDivWidth;
564 //console.log(leafEdgeWidthL);
566 var middle = this.twoPage.middle; // $$$ getter instead?
567 var top = this.twoPageTop();
568 var bookCoverDivLeft = this.twoPage.bookCoverDivLeft;
570 this.twoPage.scaledWL = this.getPageWidth2UP(indexL);
571 this.twoPage.gutter = this.twoPageGutter();
573 this.prefetchImg(indexL);
574 $(this.prefetchedImgs[indexL]).css({
575 position: 'absolute',
576 left: this.twoPage.gutter-this.twoPage.scaledWL+'px',
579 backgroundColor: this.getPageBackgroundColor(indexL),
580 height: this.twoPage.height +'px', // $$$ height forced the same for both pages
581 width: this.twoPage.scaledWL + 'px',
582 borderRight: '1px solid black',
584 }).appendTo('#GBtwopageview');
586 var indexR = this.twoPage.currentIndexR;
587 var heightR = this.getPageHeight(indexR);
588 var widthR = this.getPageWidth(indexR);
590 // $$$ should use getwidth2up?
591 //var scaledWR = this.twoPage.height*widthR/heightR;
592 this.twoPage.scaledWR = this.getPageWidth2UP(indexR);
593 this.prefetchImg(indexR);
594 $(this.prefetchedImgs[indexR]).css({
595 position: 'absolute',
596 left: this.twoPage.gutter+'px',
599 backgroundColor: this.getPageBackgroundColor(indexR),
600 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
601 width: this.twoPage.scaledWR + 'px',
602 borderLeft: '1px solid black',
604 }).appendTo('#GBtwopageview');
607 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
608 this.setMouseHandlers2UP();
609 this.twoPageSetCursor();
611 this.updatePageNumBox2UP();
612 this.updateToolbarZoom(this.reduce);
614 // this.twoPagePlaceFlipAreas(); // No longer used
618 // updatePageNumBox2UP
619 //______________________________________________________________________________
620 GnuBook.prototype.updatePageNumBox2UP = function() {
621 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
622 $("#GBpagenum").val(this.getPageNum(this.currentIndex()));
624 $("#GBpagenum").val('');
626 this.updateLocationHash();
630 //______________________________________________________________________________
631 GnuBook.prototype.loadLeafs = function() {
635 if (null == this.timer) {
636 this.timer=setTimeout(function(){self.drawLeafs()},250);
638 clearTimeout(this.timer);
639 this.timer=setTimeout(function(){self.drawLeafs()},250);
645 // Pass 1 to zoom in, anything else to zoom out
646 //______________________________________________________________________________
647 GnuBook.prototype.zoom = function(direction) {
649 case this.constMode1up:
650 return this.zoom1up(direction);
651 case this.constMode2up:
652 return this.zoom2up(direction);
657 //______________________________________________________________________________
658 GnuBook.prototype.zoom1up = function(dir) {
660 if (2 == this.mode) { //can only zoom in 1-page mode
665 // $$$ with flexible zoom we could "snap" to /2 page reductions
666 // for better scaling
668 if (this.reduce <= 0.5) return;
669 this.reduce*=0.5; //zoom in
671 if (this.reduce >= 8) return;
672 this.reduce*=2; //zoom out
675 this.resizePageView();
677 $('#GBpageview').empty()
678 this.displayedIndices = [];
681 this.updateToolbarZoom(this.reduce);
683 // Recalculate search hilites
684 this.removeSearchHilites();
685 this.updateSearchHilites();
690 //______________________________________________________________________________
691 GnuBook.prototype.resizePageView = function() {
694 //var viewWidth = $('#GBcontainer').width(); //includes scrollBar
695 var viewWidth = $('#GBcontainer').attr('clientWidth');
697 var oldScrollTop = $('#GBcontainer').attr('scrollTop');
698 var oldScrollLeft = $('#GBcontainer').attr('scrollLeft');
699 var oldPageViewHeight = $('#GBpageview').height();
700 var oldPageViewWidth = $('#GBpageview').width();
702 var oldCenterY = this.centerY1up();
703 var oldCenterX = this.centerX1up();
705 if (0 != oldPageViewHeight) {
706 var scrollRatio = oldCenterY / oldPageViewHeight;
711 for (i=0; i<this.numLeafs; i++) {
712 viewHeight += parseInt(this.getPageHeight(i)/this.reduce) + this.padding;
713 var width = parseInt(this.getPageWidth(i)/this.reduce);
714 if (width>viewWidth) viewWidth=width;
716 $('#GBpageview').height(viewHeight);
717 $('#GBpageview').width(viewWidth);
719 var newCenterY = scrollRatio*viewHeight;
720 var newTop = Math.max(0, Math.floor( newCenterY - $('#GBcontainer').height()/2 ));
721 $('#GBcontainer').attr('scrollTop', newTop);
723 // We use clientWidth here to avoid miscalculating due to scroll bar
724 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
725 var newLeft = newCenterX - $('#GBcontainer').attr('clientWidth') / 2;
726 newLeft = Math.max(newLeft, 0);
727 $('#GBcontainer').attr('scrollLeft', newLeft);
728 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
730 //this.centerPageView();
733 // Not really needed until there is 1up autofit
734 this.removeSearchHilites();
735 this.updateSearchHilites();
739 //______________________________________________________________________________
740 // Returns the current offset of the viewport center in scaled document coordinates.
741 GnuBook.prototype.centerX1up = function() {
743 if ($('#GBpageview').width() < $('#GBcontainer').attr('clientWidth')) { // fully shown
744 centerX = $('#GBpageview').width();
746 centerX = $('#GBcontainer').attr('scrollLeft') + $('#GBcontainer').attr('clientWidth') / 2;
748 centerX = Math.floor(centerX);
753 //______________________________________________________________________________
754 // Returns the current offset of the viewport center in scaled document coordinates.
755 GnuBook.prototype.centerY1up = function() {
756 var centerY = $('#GBcontainer').attr('scrollTop') + $('#GBcontainer').height() / 2;
757 return Math.floor(centerY);
761 //______________________________________________________________________________
762 GnuBook.prototype.centerPageView = function() {
764 var scrollWidth = $('#GBcontainer').attr('scrollWidth');
765 var clientWidth = $('#GBcontainer').attr('clientWidth');
766 //console.log('sW='+scrollWidth+' cW='+clientWidth);
767 if (scrollWidth > clientWidth) {
768 $('#GBcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
773 // zoom2up(direction)
774 //______________________________________________________________________________
775 GnuBook.prototype.zoom2up = function(direction) {
777 // Hard stop autoplay
778 this.stopFlipAnimations();
780 // Get new zoom state
781 var newZoom = this.twoPageNextReduce(this.reduce, direction);
782 if ((this.reduce == newZoom.reduce) && (this.twoPage.autofit == newZoom.autofit)) {
785 this.twoPage.autofit = newZoom.autofit;
786 this.reduce = newZoom.reduce;
788 // Preserve view center position
789 var oldCenter = this.twoPageGetViewCenter();
791 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
792 // $$$ An improvement would be to use the low res image until the larger one is loaded.
793 if (1 == direction) {
794 for (var img in this.prefetchedImgs) {
795 delete this.prefetchedImgs[img];
799 // Prepare view with new center to minimize visual glitches
800 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
804 // quantizeReduce(reduce)
805 //______________________________________________________________________________
806 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
807 GnuBook.prototype.quantizeReduce = function(reduce) {
808 var quantized = this.reductionFactors[0];
809 var distance = Math.abs(reduce - quantized);
810 for (var i = 1; i < this.reductionFactors.length; i++) {
811 newDistance = Math.abs(reduce - this.reductionFactors[i]);
812 if (newDistance < distance) {
813 distance = newDistance;
814 quantized = this.reductionFactors[i];
821 // twoPageNextReduce()
822 //______________________________________________________________________________
823 // Returns the next reduction level
824 GnuBook.prototype.twoPageNextReduce = function(reduce, direction) {
826 var autofitReduce = this.twoPageGetAutofitReduce();
828 if (0 == direction) { // autofit
829 result.autofit = true;
830 result.reduce = autofitReduce;
832 } else if (1 == direction) { // zoom in
833 var newReduce = this.reductionFactors[0];
835 for (var i = 1; i < this.reductionFactors.length; i++) {
836 if (this.reductionFactors[i] < reduce) {
837 newReduce = this.reductionFactors[i];
841 if (!this.twoPage.autofit && (autofitReduce < reduce && autofitReduce > newReduce)) {
843 result.autofit = true;
844 result.reduce = autofitReduce;
846 result.autofit = false;
847 result.reduce = newReduce;
851 var lastIndex = this.reductionFactors.length - 1;
852 var newReduce = this.reductionFactors[lastIndex];
854 for (var i = lastIndex; i >= 0; i--) {
855 if (this.reductionFactors[i] > reduce) {
856 newReduce = this.reductionFactors[i];
860 if (!this.twoPage.autofit && (autofitReduce > reduce && autofitReduce < newReduce)) {
862 result.autofit = true;
863 result.reduce = autofitReduce;
865 result.autofit = false;
866 result.reduce = newReduce;
874 //______________________________________________________________________________
875 // Attempts to jump to page. Returns true if page could be found, false otherwise.
876 GnuBook.prototype.jumpToPage = function(pageNum) {
878 var pageIndex = this.getPageIndex(pageNum);
880 if ('undefined' != typeof(pageIndex)) {
883 this.jumpToIndex(pageIndex);
884 $('#GBcontainer').attr('scrollTop', leafTop);
893 //______________________________________________________________________________
894 GnuBook.prototype.jumpToIndex = function(index, pageX, pageY) {
896 if (2 == this.mode) {
899 // By checking against min/max we do nothing if requested index
901 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
902 this.flipBackToIndex(index);
903 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
904 this.flipFwdToIndex(index);
912 for (i=0; i<index; i++) {
913 h = parseInt(this.getPageHeight(i)/this.reduce);
914 leafTop += h + this.padding;
918 //console.log('pageY ' + pageY);
919 var offset = parseInt( (pageY) / this.reduce);
920 offset -= $('#GBcontainer').attr('clientHeight') >> 1;
921 //console.log( 'jumping to ' + leafTop + ' ' + offset);
926 var offset = parseInt( (pageX) / this.reduce);
927 offset -= $('#GBcontainer').attr('clientWidth') >> 1;
931 //$('#GBcontainer').attr('scrollTop', leafTop);
932 $('#GBcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
938 //______________________________________________________________________________
939 GnuBook.prototype.switchMode = function(mode) {
941 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
943 if (mode == this.mode) return;
945 if (!this.canSwitchToMode(mode)) {
950 this.removeSearchHilites();
954 this.switchToolbarMode(mode);
956 // $$$ TODO preserve center of view when switching between mode
957 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
960 this.reduce = this.quantizeReduce(this.reduce);
961 this.prepareOnePageView();
963 this.twoPage.autofit = false; // Take zoom level from other mode
964 this.reduce = this.quantizeReduce(this.reduce);
965 this.prepareTwoPageView();
966 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
971 //prepareOnePageView()
972 //______________________________________________________________________________
973 GnuBook.prototype.prepareOnePageView = function() {
975 // var startLeaf = this.displayedIndices[0];
976 var startLeaf = this.currentIndex();
978 $('#GBcontainer').empty();
979 $('#GBcontainer').css({
984 var gbPageView = $("#GBcontainer").append("<div id='GBpageview'></div>");
986 this.resizePageView();
988 this.jumpToIndex(startLeaf);
989 this.displayedIndices = [];
991 this.drawLeafsOnePage();
993 // Bind mouse handlers
994 // Disable mouse click to avoid selected/highlighted page images - bug 354239
995 gbPageView.bind('mousedown', function(e) {
996 // $$$ check here for right-click and don't disable. Also use jQuery style
997 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
1000 // Special hack for IE7
1001 gbPageView[0].onselectstart = function(e) { return false; };
1004 // prepareTwoPageView()
1005 //______________________________________________________________________________
1006 // Some decisions about two page view:
1008 // Both pages will be displayed at the same height, even if they were different physical/scanned
1009 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
1010 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
1011 // aspect ratio to determine the height.
1013 // The two page view div is resized to keep the middle of the book in the middle of the div
1014 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the GBcontent
1015 // div requires adjusting the offset of GBtwpageview and/or scrolling in GBcontent.
1016 GnuBook.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
1017 $('#GBcontainer').empty();
1018 $('#GBcontainer').css('overflow', 'auto');
1020 // We want to display two facing pages. We may be missing
1021 // one side of the spread because it is the first/last leaf,
1022 // foldouts, missing pages, etc
1024 //var targetLeaf = this.displayedIndices[0];
1025 var targetLeaf = this.firstIndex;
1027 if (targetLeaf < this.firstDisplayableIndex()) {
1028 targetLeaf = this.firstDisplayableIndex();
1031 if (targetLeaf > this.lastDisplayableIndex()) {
1032 targetLeaf = this.lastDisplayableIndex();
1035 //this.twoPage.currentIndexL = null;
1036 //this.twoPage.currentIndexR = null;
1037 //this.pruneUnusedImgs();
1039 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1040 this.twoPage.currentIndexL = currentSpreadIndices[0];
1041 this.twoPage.currentIndexR = currentSpreadIndices[1];
1042 this.firstIndex = this.twoPage.currentIndexL;
1044 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1046 this.pruneUnusedImgs();
1047 this.prefetch(); // Preload images or reload if scaling has changed
1049 //console.dir(this.twoPage);
1051 // Add the two page view
1052 // $$$ Can we get everything set up and then append?
1053 $('#GBcontainer').append('<div id="GBtwopageview"></div>');
1055 // $$$ calculate first then set
1056 $('#GBtwopageview').css( {
1057 height: this.twoPage.totalHeight + 'px',
1058 width: this.twoPage.totalWidth + 'px',
1059 position: 'absolute'
1062 // If there will not be scrollbars (e.g. when zooming out) we center the book
1063 // since otherwise the book will be stuck off-center
1064 if (this.twoPage.totalWidth < $('#GBcontainer').attr('clientWidth')) {
1065 centerPercentageX = 0.5;
1067 if (this.twoPage.totalHeight < $('#GBcontainer').attr('clientHeight')) {
1068 centerPercentageY = 0.5;
1071 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1073 this.twoPage.coverDiv = document.createElement('div');
1074 $(this.twoPage.coverDiv).attr('id', 'GBbookcover').css({
1075 border: '1px solid rgb(68, 25, 17)',
1076 width: this.twoPage.bookCoverDivWidth + 'px',
1077 height: this.twoPage.bookCoverDivHeight+'px',
1078 visibility: 'visible',
1079 position: 'absolute',
1080 backgroundColor: '#663929',
1081 left: this.twoPage.bookCoverDivLeft + 'px',
1082 top: this.twoPage.bookCoverDivTop+'px',
1083 MozBorderRadiusTopleft: '7px',
1084 MozBorderRadiusTopright: '7px',
1085 MozBorderRadiusBottomright: '7px',
1086 MozBorderRadiusBottomleft: '7px'
1087 }).appendTo('#GBtwopageview');
1089 this.leafEdgeR = document.createElement('div');
1090 this.leafEdgeR.className = 'leafEdgeR'; // $$$ the static CSS should be moved into the .css file
1091 $(this.leafEdgeR).css({
1092 borderStyle: 'solid solid solid none',
1093 borderColor: 'rgb(51, 51, 34)',
1094 borderWidth: '1px 1px 1px 0px',
1095 background: 'transparent url(' + this.imagesBaseURL + 'right_edges.png) repeat scroll 0% 0%',
1096 width: this.twoPage.leafEdgeWidthR + 'px',
1097 height: this.twoPage.height-1 + 'px',
1099 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1100 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1101 position: 'absolute'
1102 }).appendTo('#GBtwopageview');
1104 this.leafEdgeL = document.createElement('div');
1105 this.leafEdgeL.className = 'leafEdgeL';
1106 $(this.leafEdgeL).css({ // $$$ static CSS should be moved to file
1107 borderStyle: 'solid none solid solid',
1108 borderColor: 'rgb(51, 51, 34)',
1109 borderWidth: '1px 0px 1px 1px',
1110 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1111 width: this.twoPage.leafEdgeWidthL + 'px',
1112 height: this.twoPage.height-1 + 'px',
1113 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1114 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1115 position: 'absolute'
1116 }).appendTo('#GBtwopageview');
1118 div = document.createElement('div');
1119 $(div).attr('id', 'GBbookspine').css({
1120 border: '1px solid rgb(68, 25, 17)',
1121 width: this.twoPage.bookSpineDivWidth+'px',
1122 height: this.twoPage.bookSpineDivHeight+'px',
1123 position: 'absolute',
1124 backgroundColor: 'rgb(68, 25, 17)',
1125 left: this.twoPage.bookSpineDivLeft+'px',
1126 top: this.twoPage.bookSpineDivTop+'px'
1127 }).appendTo('#GBtwopageview');
1129 var self = this; // for closure
1131 /* Flip areas no longer used
1132 this.twoPage.leftFlipArea = document.createElement('div');
1133 this.twoPage.leftFlipArea.className = 'GBfliparea';
1134 $(this.twoPage.leftFlipArea).attr('id', 'GBleftflip').css({
1136 width: this.twoPageFlipAreaWidth() + 'px',
1137 height: this.twoPageFlipAreaHeight() + 'px',
1138 position: 'absolute',
1139 left: this.twoPageLeftFlipAreaLeft() + 'px',
1140 top: this.twoPageFlipAreaTop() + 'px',
1143 }).bind('click', function(e) {
1145 }).bind('mousedown', function(e) {
1147 }).appendTo('#GBtwopageview');
1149 this.twoPage.rightFlipArea = document.createElement('div');
1150 this.twoPage.rightFlipArea.className = 'GBfliparea';
1151 $(this.twoPage.rightFlipArea).attr('id', 'GBrightflip').css({
1153 width: this.twoPageFlipAreaWidth() + 'px',
1154 height: this.twoPageFlipAreaHeight() + 'px',
1155 position: 'absolute',
1156 left: this.twoPageRightFlipAreaLeft() + 'px',
1157 top: this.twoPageFlipAreaTop() + 'px',
1160 }).bind('click', function(e) {
1162 }).bind('mousedown', function(e) {
1164 }).appendTo('#GBtwopageview');
1167 this.prepareTwoPagePopUp();
1169 this.displayedIndices = [];
1171 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1172 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1174 this.drawLeafsTwoPage();
1175 this.updateToolbarZoom(this.reduce);
1179 this.removeSearchHilites();
1180 this.updateSearchHilites();
1184 // prepareTwoPagePopUp()
1186 // This function prepares the "View Page n" popup that shows while the mouse is
1187 // over the left/right "stack of sheets" edges. It also binds the mouse
1188 // events for these divs.
1189 //______________________________________________________________________________
1190 GnuBook.prototype.prepareTwoPagePopUp = function() {
1192 this.twoPagePopUp = document.createElement('div');
1193 $(this.twoPagePopUp).css({
1194 border: '1px solid black',
1196 position: 'absolute',
1197 fontFamily: 'sans-serif',
1200 backgroundColor: 'rgb(255, 255, 238)',
1202 }).appendTo('#GBcontainer');
1203 $(this.twoPagePopUp).hide();
1205 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1206 $(e.data.twoPagePopUp).show();
1209 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1210 $(e.data.twoPagePopUp).hide();
1213 $(this.leafEdgeL).bind('click', this, function(e) {
1215 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1216 e.data.jumpToIndex(jumpIndex);
1219 $(this.leafEdgeR).bind('click', this, function(e) {
1221 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1222 e.data.jumpToIndex(jumpIndex);
1225 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1227 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1228 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1230 // $$$ TODO: Make sure popup is positioned so that it is in view
1231 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1232 $(e.data.twoPagePopUp).css({
1233 left: e.pageX- $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() + 20 + 'px',
1234 top: e.pageY - $('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
1238 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1240 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1241 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1243 // $$$ TODO: Make sure popup is positioned so that it is in view
1244 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1245 $(e.data.twoPagePopUp).css({
1246 left: e.pageX - $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1247 top: e.pageY-$('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
1252 // calculateSpreadSize()
1253 //______________________________________________________________________________
1254 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1255 // this.twoPage.currentIndexR
1256 // This function sets this.twoPage.height, twoPage.width
1258 GnuBook.prototype.calculateSpreadSize = function() {
1260 var firstIndex = this.twoPage.currentIndexL;
1261 var secondIndex = this.twoPage.currentIndexR;
1262 //console.log('first page is ' + firstIndex);
1264 // Calculate page sizes and total leaf width
1266 if ( this.twoPage.autofit) {
1267 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1269 // set based on reduction factor
1270 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1273 // Both pages together
1274 this.twoPage.height = spreadSize.height;
1275 this.twoPage.width = spreadSize.width;
1278 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1279 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1282 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1283 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1284 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1288 // The width of the book cover div. The combined width of both pages, twice the width
1289 // of the book cover internal padding (2*10) and the page edges
1290 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1291 // The height of the book cover div
1292 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1295 // We calculate the total width and height for the div so that we can make the book
1297 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1298 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1299 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1300 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1301 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1302 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1304 // We want to minimize the unused space in two-up mode (maximize the amount of page
1305 // shown). We give width to the leaf edges and these widths change (though the sum
1306 // of the two remains constant) as we flip through the book. With the book
1307 // cover centered and fixed in the GBcontainer div the page images will meet
1308 // at the "gutter" which is generally offset from the center.
1309 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1310 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1312 // The left edge of the book cover moves depending on the width of the pages
1313 // $$$ change to getter
1314 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1315 // The top edge of the book cover stays a fixed distance from the top
1316 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1319 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1320 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1321 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1324 this.reduce = spreadSize.reduce; // $$$ really set this here?
1327 GnuBook.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1330 // We check which page is closest to a "normal" page and use that to set the height
1331 // for both pages. This means that foldouts and other odd size pages will be displayed
1332 // smaller than the nominal zoom amount.
1333 var canon5Dratio = 1.5;
1336 height: this.getPageHeight(firstIndex),
1337 width: this.getPageWidth(firstIndex)
1341 height: this.getPageHeight(secondIndex),
1342 width: this.getPageWidth(secondIndex)
1345 var firstIndexRatio = first.height / first.width;
1346 var secondIndexRatio = second.height / second.width;
1347 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1350 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1351 ratio = firstIndexRatio;
1352 //console.log('using firstIndexRatio ' + ratio);
1354 ratio = secondIndexRatio;
1355 //console.log('using secondIndexRatio ' + ratio);
1358 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1359 var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1);
1360 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1362 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1363 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1365 ideal.width = ($('#GBcontainer').width() - widthOutsidePages) >> 1;
1366 ideal.width -= 10; // $$$ fudge factor
1367 ideal.height = $('#GBcontainer').height() - heightOutsidePages;
1368 ideal.height -= 20; // fudge factor
1369 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1371 if (ideal.height/ratio <= ideal.width) {
1373 ideal.width = parseInt(ideal.height/ratio);
1376 ideal.height = parseInt(ideal.width*ratio);
1379 // $$$ check this logic with large spreads
1380 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1385 // getSpreadSizeFromReduce()
1386 //______________________________________________________________________________
1387 // Returns the spread size calculated from the reduction factor for the given pages
1388 GnuBook.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1389 var spreadSize = {};
1390 // $$$ Scale this based on reduce?
1391 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1392 var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1393 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1395 // $$$ Possibly incorrect -- we should make height "dominant"
1396 var nativeWidth = this.getPageWidth(firstIndex) + this.getPageWidth(secondIndex);
1397 var nativeHeight = this.getPageHeight(firstIndex) + this.getPageHeight(secondIndex);
1398 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1399 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1400 spreadSize.reduce = reduce;
1405 // twoPageGetAutofitReduce()
1406 //______________________________________________________________________________
1407 // Returns the current ideal reduction factor
1408 GnuBook.prototype.twoPageGetAutofitReduce = function() {
1409 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1410 return spreadSize.reduce;
1413 // twoPageSetCursor()
1414 //______________________________________________________________________________
1415 // Set the cursor for two page view
1416 GnuBook.prototype.twoPageSetCursor = function() {
1417 // console.log('setting cursor');
1418 if ( ($('#GBtwopageview').width() > $('#GBcontainer').attr('clientWidth')) ||
1419 ($('#GBtwopageview').height() > $('#GBcontainer').attr('clientHeight')) ) {
1420 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1421 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1423 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1424 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1429 //______________________________________________________________________________
1430 // Returns the currently active index.
1431 GnuBook.prototype.currentIndex = function() {
1432 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1433 if (this.mode == this.constMode1up) {
1434 return this.firstIndex; // $$$ TODO page in center of view would be better
1435 } else if (this.mode == this.constMode2up) {
1436 // Only allow indices that are actually present in book
1437 return GnuBook.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
1439 throw 'currentIndex called for unimplemented mode ' + this.mode;
1444 //______________________________________________________________________________
1445 // Flip the right page over onto the left
1446 GnuBook.prototype.right = function() {
1447 if ('rl' != this.pageProgression) {
1457 //______________________________________________________________________________
1458 // Flip to the rightmost page
1459 GnuBook.prototype.rightmost = function() {
1460 if ('rl' != this.pageProgression) {
1468 //______________________________________________________________________________
1469 // Flip the left page over onto the right.
1470 GnuBook.prototype.left = function() {
1471 if ('rl' != this.pageProgression) {
1481 //______________________________________________________________________________
1482 // Flip to the leftmost page
1483 GnuBook.prototype.leftmost = function() {
1484 if ('rl' != this.pageProgression) {
1492 //______________________________________________________________________________
1493 GnuBook.prototype.next = function() {
1494 if (2 == this.mode) {
1496 this.flipFwdToIndex(null);
1498 if (this.firstIndex < this.lastDisplayableIndex()) {
1499 this.jumpToIndex(this.firstIndex+1);
1505 //______________________________________________________________________________
1506 GnuBook.prototype.prev = function() {
1507 if (2 == this.mode) {
1509 this.flipBackToIndex(null);
1511 if (this.firstIndex >= 1) {
1512 this.jumpToIndex(this.firstIndex-1);
1517 GnuBook.prototype.first = function() {
1518 this.jumpToIndex(this.firstDisplayableIndex());
1521 GnuBook.prototype.last = function() {
1522 this.jumpToIndex(this.lastDisplayableIndex());
1525 // flipBackToIndex()
1526 //______________________________________________________________________________
1527 // to flip back one spread, pass index=null
1528 GnuBook.prototype.flipBackToIndex = function(index) {
1530 if (1 == this.mode) return;
1532 var leftIndex = this.twoPage.currentIndexL;
1534 if (this.animating) return;
1536 if (null != this.leafEdgeTmp) {
1537 alert('error: leafEdgeTmp should be null!');
1541 if (null == index) {
1542 index = leftIndex-2;
1544 //if (index<0) return;
1546 var previousIndices = this.getSpreadIndices(index);
1548 if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
1552 this.animating = true;
1554 if ('rl' != this.pageProgression) {
1555 // Assume LTR and we are going backward
1556 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1557 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
1559 // RTL and going backward
1560 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1561 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
1565 // flipLeftToRight()
1566 //______________________________________________________________________________
1567 // Flips the page on the left towards the page on the right
1568 GnuBook.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
1570 var leftLeaf = this.twoPage.currentIndexL;
1572 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1573 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1574 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
1576 var currWidthL = this.getPageWidth2UP(leftLeaf);
1577 var newWidthL = this.getPageWidth2UP(newIndexL);
1578 var newWidthR = this.getPageWidth2UP(newIndexR);
1580 var top = this.twoPageTop();
1581 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
1583 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
1584 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
1586 //animation strategy:
1587 // 0. remove search highlight, if any.
1588 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
1589 // of the left leaf and where the user clicked in the leaf edge.
1590 // Note that if this function was triggered by left() and not a
1591 // mouse click, the width of leafEdgeTmp is very small (zero px).
1592 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
1593 // leftLeaf to width=0.
1594 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
1595 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
1596 // its new full width.
1597 // 4. After step 3 is finished, do the following:
1598 // - remove leafEdgeTmp from the dom.
1599 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
1600 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
1601 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
1602 // and width=newLeafEdgeWidthL.
1603 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
1604 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
1605 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
1606 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
1607 // - prefetch new adjacent leafs.
1608 // - set up click handlers for both new left and right leafs.
1609 // - redraw the search highlight.
1610 // - update the pagenum box and the url.
1613 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
1615 this.leafEdgeTmp = document.createElement('div');
1616 $(this.leafEdgeTmp).css({
1617 borderStyle: 'solid none solid solid',
1618 borderColor: 'rgb(51, 51, 34)',
1619 borderWidth: '1px 0px 1px 1px',
1620 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1621 width: leafEdgeTmpW + 'px',
1622 height: this.twoPage.height-1 + 'px',
1623 left: leftEdgeTmpLeft + 'px',
1625 position: 'absolute',
1627 }).appendTo('#GBtwopageview');
1629 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
1630 $(this.leafEdgeL).css({
1631 width: newLeafEdgeWidthL+'px',
1632 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
1635 // Left gets the offset of the current left leaf from the document
1636 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
1637 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
1638 var right = $('#GBtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#GBtwopageview').offset().left-2+'px';
1640 // We change the left leaf to right positioning
1641 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
1642 $(this.prefetchedImgs[leftLeaf]).css({
1647 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
1648 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
1652 this.removeSearchHilites();
1654 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
1655 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
1657 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
1658 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
1660 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
1661 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
1662 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
1664 $(self.leafEdgeR).css({
1665 // Moves the right leaf edge
1666 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
1667 left: gutter+newWidthR+'px'
1670 $(self.leafEdgeL).css({
1671 // Moves and resizes the left leaf edge
1672 width: newLeafEdgeWidthL+'px',
1673 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
1676 // Resizes the brown border div
1677 $(self.twoPage.coverDiv).css({
1678 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
1679 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
1682 $(self.leafEdgeTmp).remove();
1683 self.leafEdgeTmp = null;
1685 // $$$ TODO refactor with opposite direction flip
1687 self.twoPage.currentIndexL = newIndexL;
1688 self.twoPage.currentIndexR = newIndexR;
1689 self.twoPage.scaledWL = newWidthL;
1690 self.twoPage.scaledWR = newWidthR;
1691 self.twoPage.gutter = gutter;
1693 self.firstIndex = self.twoPage.currentIndexL;
1694 self.displayedIndices = [newIndexL, newIndexR];
1695 self.pruneUnusedImgs();
1697 self.animating = false;
1699 self.updateSearchHilites2UP();
1700 self.updatePageNumBox2UP();
1702 // self.twoPagePlaceFlipAreas(); // No longer used
1703 self.setMouseHandlers2UP();
1704 self.twoPageSetCursor();
1706 if (self.animationFinishedCallback) {
1707 self.animationFinishedCallback();
1708 self.animationFinishedCallback = null;
1716 //______________________________________________________________________________
1717 // Whether we flip left or right is dependent on the page progression
1718 // to flip forward one spread, pass index=null
1719 GnuBook.prototype.flipFwdToIndex = function(index) {
1721 if (this.animating) return;
1723 if (null != this.leafEdgeTmp) {
1724 alert('error: leafEdgeTmp should be null!');
1728 if (null == index) {
1729 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
1731 if (index > this.lastDisplayableIndex()) return;
1733 this.animating = true;
1735 var nextIndices = this.getSpreadIndices(index);
1737 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
1739 if ('rl' != this.pageProgression) {
1740 // We did not specify RTL
1741 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
1742 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
1745 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
1746 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
1750 // flipRightToLeft(nextL, nextR, gutter)
1751 // $$$ better not to have to pass gutter in
1752 //______________________________________________________________________________
1753 // Flip from left to right and show the nextL and nextR indices on those sides
1754 GnuBook.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
1755 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1756 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
1757 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1758 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
1760 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
1762 var top = this.twoPageTop();
1763 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
1765 var middle = this.twoPage.middle;
1766 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
1768 this.leafEdgeTmp = document.createElement('div');
1769 $(this.leafEdgeTmp).css({
1770 borderStyle: 'solid none solid solid',
1771 borderColor: 'rgb(51, 51, 34)',
1772 borderWidth: '1px 0px 1px 1px',
1773 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1774 width: leafEdgeTmpW + 'px',
1775 height: this.twoPage.height-1 + 'px',
1776 left: gutter+scaledW+'px',
1778 position: 'absolute',
1780 }).appendTo('#GBtwopageview');
1782 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
1783 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
1785 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
1786 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
1787 var newWidthL = this.getPageWidth2UP(newIndexL);
1788 var newWidthR = this.getPageWidth2UP(newIndexR);
1790 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
1792 var self = this; // closure-tastic!
1794 var speed = this.flipSpeed;
1796 this.removeSearchHilites();
1798 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
1799 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
1800 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
1801 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
1802 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
1804 $(self.leafEdgeL).css({
1805 width: newLeafEdgeWidthL+'px',
1806 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
1809 // Resizes the book cover
1810 $(self.twoPage.coverDiv).css({
1811 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
1812 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
1815 $(self.leafEdgeTmp).remove();
1816 self.leafEdgeTmp = null;
1818 self.twoPage.currentIndexL = newIndexL;
1819 self.twoPage.currentIndexR = newIndexR;
1820 self.twoPage.scaledWL = newWidthL;
1821 self.twoPage.scaledWR = newWidthR;
1822 self.twoPage.gutter = gutter;
1824 self.firstIndex = self.twoPage.currentIndexL;
1825 self.displayedIndices = [newIndexL, newIndexR];
1826 self.pruneUnusedImgs();
1828 self.animating = false;
1831 self.updateSearchHilites2UP();
1832 self.updatePageNumBox2UP();
1834 // self.twoPagePlaceFlipAreas(); // No longer used
1835 self.setMouseHandlers2UP();
1836 self.twoPageSetCursor();
1838 if (self.animationFinishedCallback) {
1839 self.animationFinishedCallback();
1840 self.animationFinishedCallback = null;
1846 // setMouseHandlers2UP
1847 //______________________________________________________________________________
1848 GnuBook.prototype.setMouseHandlers2UP = function() {
1850 $(this.prefetchedImgs[this.twoPage.currentIndexL]).bind('dblclick', function() {
1855 $(this.prefetchedImgs[this.twoPage.currentIndexR]).bind('dblclick', function() {
1862 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL] );
1863 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
1870 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR] );
1871 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
1874 e.data.self.right();
1880 //______________________________________________________________________________
1881 GnuBook.prototype.prefetchImg = function(index) {
1882 var pageURI = this.getPageURI(index);
1884 // Load image if not loaded or URI has changed (e.g. due to scaling)
1885 var loadImage = false;
1886 if (undefined == this.prefetchedImgs[index]) {
1887 //console.log('no image for ' + index);
1889 } else if (pageURI != this.prefetchedImgs[index].uri) {
1890 //console.log('uri changed for ' + index);
1895 //console.log('prefetching ' + index);
1896 var img = document.createElement("img");
1898 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
1899 this.prefetchedImgs[index] = img;
1904 // prepareFlipLeftToRight()
1906 //______________________________________________________________________________
1908 // Prepare to flip the left page towards the right. This corresponds to moving
1909 // backward when the page progression is left to right.
1910 GnuBook.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
1912 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
1914 this.prefetchImg(prevL);
1915 this.prefetchImg(prevR);
1917 var height = this.getPageHeight(prevL);
1918 var width = this.getPageWidth(prevL);
1919 var middle = this.twoPage.middle;
1920 var top = this.twoPageTop();
1921 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
1923 // The gutter is the dividing line between the left and right pages.
1924 // It is offset from the middle to create the illusion of thickness to the pages
1925 var gutter = middle + this.gutterOffsetForIndex(prevL);
1927 //console.log(' gutter for ' + prevL + ' is ' + gutter);
1928 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
1929 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
1932 position: 'absolute',
1933 left: gutter-scaledW+'px',
1934 right: '', // clear right property
1936 height: this.twoPage.height,
1937 width: scaledW+'px',
1938 backgroundColor: this.getPageBackgroundColor(prevL),
1939 borderRight: '1px solid black',
1943 $(this.prefetchedImgs[prevL]).css(leftCSS);
1945 $('#GBtwopageview').append(this.prefetchedImgs[prevL]);
1947 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
1950 position: 'absolute',
1954 height: this.twoPage.height,
1956 backgroundColor: this.getPageBackgroundColor(prevR),
1957 borderLeft: '1px solid black',
1961 $(this.prefetchedImgs[prevR]).css(rightCSS);
1963 $('#GBtwopageview').append(this.prefetchedImgs[prevR]);
1967 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
1968 // prepareFlipRightToLeft()
1969 //______________________________________________________________________________
1970 GnuBook.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
1972 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
1975 this.prefetchImg(nextL);
1976 this.prefetchImg(nextR);
1978 var height = this.getPageHeight(nextR);
1979 var width = this.getPageWidth(nextR);
1980 var middle = this.twoPage.middle;
1981 var top = this.twoPageTop();
1982 var scaledW = this.twoPage.height*width/height;
1984 var gutter = middle + this.gutterOffsetForIndex(nextL);
1986 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
1987 $(this.prefetchedImgs[nextR]).css({
1988 position: 'absolute',
1991 backgroundColor: this.getPageBackgroundColor(nextR),
1992 height: this.twoPage.height,
1993 width: scaledW+'px',
1994 borderLeft: '1px solid black',
1998 $('#GBtwopageview').append(this.prefetchedImgs[nextR]);
2000 height = this.getPageHeight(nextL);
2001 width = this.getPageWidth(nextL);
2002 scaledW = this.twoPage.height*width/height;
2004 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#GBcontainer').width()-gutter);
2005 $(this.prefetchedImgs[nextL]).css({
2006 position: 'absolute',
2007 right: $('#GBtwopageview').attr('clientWidth')-gutter+'px',
2009 backgroundColor: this.getPageBackgroundColor(nextL),
2010 height: this.twoPage.height,
2011 width: 0+'px', // Start at 0 width, then grow to the left
2012 borderRight: '1px solid black',
2016 $('#GBtwopageview').append(this.prefetchedImgs[nextL]);
2020 // getNextLeafs() -- NOT RTL AWARE
2021 //______________________________________________________________________________
2022 // GnuBook.prototype.getNextLeafs = function(o) {
2023 // //TODO: we might have two left or two right leafs in a row (damaged book)
2024 // //For now, assume that leafs are contiguous.
2026 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2027 // o.L = this.twoPage.currentIndexL+2;
2028 // o.R = this.twoPage.currentIndexL+3;
2031 // getprevLeafs() -- NOT RTL AWARE
2032 //______________________________________________________________________________
2033 // GnuBook.prototype.getPrevLeafs = function(o) {
2034 // //TODO: we might have two left or two right leafs in a row (damaged book)
2035 // //For now, assume that leafs are contiguous.
2037 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2038 // o.L = this.twoPage.currentIndexL-2;
2039 // o.R = this.twoPage.currentIndexL-1;
2042 // pruneUnusedImgs()
2043 //______________________________________________________________________________
2044 GnuBook.prototype.pruneUnusedImgs = function() {
2045 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2046 for (var key in this.prefetchedImgs) {
2047 //console.log('key is ' + key);
2048 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2049 //console.log('removing key '+ key);
2050 $(this.prefetchedImgs[key]).remove();
2052 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2053 //console.log('deleting key '+ key);
2054 delete this.prefetchedImgs[key];
2060 //______________________________________________________________________________
2061 GnuBook.prototype.prefetch = function() {
2063 // prefetch visible pages first
2064 this.prefetchImg(this.twoPage.currentIndexL);
2065 this.prefetchImg(this.twoPage.currentIndexR);
2067 var adjacentPagesToLoad = 3;
2069 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2070 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2072 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2073 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2075 // Load images spreading out from current
2076 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2077 var goingDown = lowCurrent - i;
2078 if (goingDown >= start) {
2079 this.prefetchImg(goingDown);
2081 var goingUp = highCurrent + i;
2082 if (goingUp <= end) {
2083 this.prefetchImg(goingUp);
2088 var lim = this.twoPage.currentIndexL-4;
2090 lim = Math.max(lim, 0);
2091 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2092 this.prefetchImg(i);
2095 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2096 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2097 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2098 this.prefetchImg(i);
2104 // getPageWidth2UP()
2105 //______________________________________________________________________________
2106 GnuBook.prototype.getPageWidth2UP = function(index) {
2107 // We return the width based on the dominant height
2108 var height = this.getPageHeight(index);
2109 var width = this.getPageWidth(index);
2110 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2114 //______________________________________________________________________________
2115 GnuBook.prototype.search = function(term) {
2116 term = term.replace(/\//g, ' '); // strip slashes
2117 this.searchTerm = term;
2118 $('#GnuBookSearchScript').remove();
2119 var script = document.createElement("script");
2120 script.setAttribute('id', 'GnuBookSearchScript');
2121 script.setAttribute("type", "text/javascript");
2122 script.setAttribute("src", 'http://'+this.server+'/GnuBook/flipbook_search_gb.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=gb.GBSearchCallback');
2123 document.getElementsByTagName('head')[0].appendChild(script);
2124 $('#GnuBookSearchBox').val(term);
2125 $('#GnuBookSearchResults').html('Searching...');
2128 // GBSearchCallback()
2129 //______________________________________________________________________________
2130 GnuBook.prototype.GBSearchCallback = function(txt) {
2132 if (jQuery.browser.msie) {
2133 var dom=new ActiveXObject("Microsoft.XMLDOM");
2137 var parser = new DOMParser();
2138 var dom = parser.parseFromString(txt, "text/xml");
2141 $('#GnuBookSearchResults').empty();
2142 $('#GnuBookSearchResults').append('<ul>');
2144 for (var key in this.searchResults) {
2145 if (null != this.searchResults[key].div) {
2146 $(this.searchResults[key].div).remove();
2148 delete this.searchResults[key];
2151 var pages = dom.getElementsByTagName('PAGE');
2153 if (0 == pages.length) {
2154 // $$$ it would be nice to echo the (sanitized) search result here
2155 $('#GnuBookSearchResults').append('<li>No search results found</li>');
2157 for (var i = 0; i < pages.length; i++){
2158 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2161 var re = new RegExp (/_(\d{4})/);
2162 var reMatch = re.exec(pages[i].getAttribute('file'));
2163 var index = parseInt(reMatch[1], 10);
2164 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2166 var children = pages[i].childNodes;
2168 for (var j=0; j<children.length; j++) {
2169 //console.log(j + ' - ' + children[j].nodeName);
2170 //console.log(children[j].firstChild.nodeValue);
2171 if ('CONTEXT' == children[j].nodeName) {
2172 context += children[j].firstChild.nodeValue;
2173 } else if ('WORD' == children[j].nodeName) {
2174 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2176 var index = this.leafNumToIndex(index);
2177 if (null != index) {
2178 //coordinates are [left, bottom, right, top, [baseline]]
2179 //we'll skip baseline for now...
2180 var coords = children[j].getAttribute('coords').split(',',4);
2181 if (4 == coords.length) {
2182 this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
2187 var pageName = this.getPageName(index);
2188 var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
2189 var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
2190 //TODO: remove hardcoded instance name
2191 $('#GnuBookSearchResults').append('<li><b><a href="javascript:gb.jumpToIndex('+index+','+middleX+','+middleY+');">' + pageName + '</a></b> - ' + context + '</li>');
2194 $('#GnuBookSearchResults').append('</ul>');
2196 // $$$ update again for case of loading search URL in new browser window (search box may not have been ready yet)
2197 $('#GnuBookSearchBox').val(this.searchTerm);
2199 this.updateSearchHilites();
2202 // updateSearchHilites()
2203 //______________________________________________________________________________
2204 GnuBook.prototype.updateSearchHilites = function() {
2205 if (2 == this.mode) {
2206 this.updateSearchHilites2UP();
2208 this.updateSearchHilites1UP();
2212 // showSearchHilites1UP()
2213 //______________________________________________________________________________
2214 GnuBook.prototype.updateSearchHilites1UP = function() {
2216 for (var key in this.searchResults) {
2218 if (-1 != jQuery.inArray(parseInt(key), this.displayedIndices)) {
2219 var result = this.searchResults[key];
2220 if(null == result.div) {
2221 result.div = document.createElement('div');
2222 $(result.div).attr('className', 'GnuBookSearchHilite').appendTo('#pagediv'+key);
2223 //console.log('appending ' + key);
2226 width: (result.r-result.l)/this.reduce + 'px',
2227 height: (result.b-result.t)/this.reduce + 'px',
2228 left: (result.l)/this.reduce + 'px',
2229 top: (result.t)/this.reduce +'px'
2233 //console.log(key + ' not displayed');
2234 this.searchResults[key].div=null;
2240 //______________________________________________________________________________
2241 // Returns the position of the gutter (line between the page images)
2242 GnuBook.prototype.twoPageGutter = function() {
2243 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2247 //______________________________________________________________________________
2248 // Returns the offset for the top of the page images
2249 GnuBook.prototype.twoPageTop = function() {
2250 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2253 // twoPageCoverWidth()
2254 //______________________________________________________________________________
2255 // Returns the width of the cover div given the total page width
2256 GnuBook.prototype.twoPageCoverWidth = function(totalPageWidth) {
2257 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2260 // twoPageGetViewCenter()
2261 //______________________________________________________________________________
2262 // Returns the percentage offset into twopageview div at the center of container div
2263 // { percentageX: float, percentageY: float }
2264 GnuBook.prototype.twoPageGetViewCenter = function() {
2267 var containerOffset = $('#GBcontainer').offset();
2268 var viewOffset = $('#GBtwopageview').offset();
2269 center.percentageX = (containerOffset.left - viewOffset.left + ($('#GBcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2270 center.percentageY = (containerOffset.top - viewOffset.top + ($('#GBcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2275 // twoPageCenterView(percentageX, percentageY)
2276 //______________________________________________________________________________
2277 // Centers the point given by percentage from left,top of twopageview
2278 GnuBook.prototype.twoPageCenterView = function(percentageX, percentageY) {
2279 if ('undefined' == typeof(percentageX)) {
2282 if ('undefined' == typeof(percentageY)) {
2286 var viewWidth = $('#GBtwopageview').width();
2287 var containerClientWidth = $('#GBcontainer').attr('clientWidth');
2288 var intoViewX = percentageX * viewWidth;
2290 var viewHeight = $('#GBtwopageview').height();
2291 var containerClientHeight = $('#GBcontainer').attr('clientHeight');
2292 var intoViewY = percentageY * viewHeight;
2294 if (viewWidth < containerClientWidth) {
2295 // Can fit width without scrollbars - center by adjusting offset
2296 $('#GBtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2298 // Need to scroll to center
2299 $('#GBtwopageview').css('left', 0);
2300 $('#GBcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2303 if (viewHeight < containerClientHeight) {
2304 // Fits with scrollbars - add offset
2305 $('#GBtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2307 $('#GBtwopageview').css('top', 0);
2308 $('#GBcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2312 // twoPageFlipAreaHeight
2313 //______________________________________________________________________________
2314 // Returns the integer height of the click-to-flip areas at the edges of the book
2315 GnuBook.prototype.twoPageFlipAreaHeight = function() {
2316 return parseInt(this.twoPage.height);
2319 // twoPageFlipAreaWidth
2320 //______________________________________________________________________________
2321 // Returns the integer width of the flip areas
2322 GnuBook.prototype.twoPageFlipAreaWidth = function() {
2323 var max = 100; // $$$ TODO base on view width?
2326 var width = this.twoPage.width * 0.15;
2327 return parseInt(GnuBook.util.clamp(width, min, max));
2330 // twoPageFlipAreaTop
2331 //______________________________________________________________________________
2332 // Returns integer top offset for flip areas
2333 GnuBook.prototype.twoPageFlipAreaTop = function() {
2334 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2337 // twoPageLeftFlipAreaLeft
2338 //______________________________________________________________________________
2339 // Left offset for left flip area
2340 GnuBook.prototype.twoPageLeftFlipAreaLeft = function() {
2341 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2344 // twoPageRightFlipAreaLeft
2345 //______________________________________________________________________________
2346 // Left offset for right flip area
2347 GnuBook.prototype.twoPageRightFlipAreaLeft = function() {
2348 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2351 // twoPagePlaceFlipAreas
2352 //______________________________________________________________________________
2353 // Readjusts position of flip areas based on current layout
2354 GnuBook.prototype.twoPagePlaceFlipAreas = function() {
2355 // We don't set top since it shouldn't change relative to view
2356 $(this.twoPage.leftFlipArea).css({
2357 left: this.twoPageLeftFlipAreaLeft() + 'px',
2358 width: this.twoPageFlipAreaWidth() + 'px'
2360 $(this.twoPage.rightFlipArea).css({
2361 left: this.twoPageRightFlipAreaLeft() + 'px',
2362 width: this.twoPageFlipAreaWidth() + 'px'
2366 // showSearchHilites2UP()
2367 //______________________________________________________________________________
2368 GnuBook.prototype.updateSearchHilites2UP = function() {
2370 for (var key in this.searchResults) {
2371 key = parseInt(key, 10);
2372 if (-1 != jQuery.inArray(key, this.displayedIndices)) {
2373 var result = this.searchResults[key];
2374 if(null == result.div) {
2375 result.div = document.createElement('div');
2376 $(result.div).attr('className', 'GnuBookSearchHilite').css('zIndex', 3).appendTo('#GBtwopageview');
2377 //console.log('appending ' + key);
2380 // We calculate the reduction factor for the specific page because it can be different
2381 // for each page in the spread
2382 var height = this.getPageHeight(key);
2383 var width = this.getPageWidth(key)
2384 var reduce = this.twoPage.height/height;
2385 var scaledW = parseInt(width*reduce);
2387 var gutter = this.twoPageGutter();
2389 if ('L' == this.getPageSide(key)) {
2390 pageL = gutter-scaledW;
2394 var pageT = this.twoPageTop();
2397 width: (result.r-result.l)*reduce + 'px',
2398 height: (result.b-result.t)*reduce + 'px',
2399 left: pageL+(result.l)*reduce + 'px',
2400 top: pageT+(result.t)*reduce +'px'
2404 //console.log(key + ' not displayed');
2405 if (null != this.searchResults[key].div) {
2406 //console.log('removing ' + key);
2407 $(this.searchResults[key].div).remove();
2409 this.searchResults[key].div=null;
2414 // removeSearchHilites()
2415 //______________________________________________________________________________
2416 GnuBook.prototype.removeSearchHilites = function() {
2417 for (var key in this.searchResults) {
2418 if (null != this.searchResults[key].div) {
2419 $(this.searchResults[key].div).remove();
2420 this.searchResults[key].div=null;
2426 //______________________________________________________________________________
2427 GnuBook.prototype.printPage = function() {
2428 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2430 /* iframe implementation
2432 if (null != this.printPopup) { // check if already showing
2435 this.printPopup = document.createElement("div");
2436 $(this.printPopup).css({
2437 position: 'absolute',
2439 left: ($('#GBcontainer').width()-400)/2 + 'px',
2442 border: "3px double #999999",
2444 backgroundColor: "#fff"
2445 }).appendTo('#GnuBook');
2448 if (this.constMode1up == this.mode) {
2449 indexToPrint = this.firstIndex;
2451 indexToPrint = this.twoPage.currentIndexL;
2454 this.indexToPrint = indexToPrint;
2456 var htmlStr = '<div style="text-align: center;">';
2457 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>';
2458 htmlStr += '<div id="printDiv" name="printDiv" style="text-align: center; width: 233px; margin: auto">'
2459 htmlStr += '<p style="text-align:right; margin: 0; font-size: 0.85em">';
2460 //htmlStr += '<button class="GBicon rollover book_up" onclick="gb.updatePrintFrame(-1); return false;"></button> ';
2461 //htmlStr += '<button class="GBicon rollover book_down" onclick="gb.updatePrintFrame(1); return false;"></button>';
2462 htmlStr += '<a href="#" onclick="gb.updatePrintFrame(-1); return false;">Prev</a> <a href="#" onclick="gb.updatePrintFrame(1); return false;">Next</a>';
2464 htmlStr += '</div>';
2465 htmlStr += '<p style="text-align:center;"><a href="" onclick="gb.printPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2466 htmlStr += '</div>';
2468 this.printPopup.innerHTML = htmlStr;
2470 var iframe = document.createElement('iframe');
2471 iframe.id = 'printFrame';
2472 iframe.name = 'printFrame';
2473 iframe.width = '233px'; // 8.5 x 11 aspect
2474 iframe.height = '300px';
2476 var self = this; // closure
2478 $(iframe).load(function() {
2479 var doc = GnuBook.util.getIFrameDocument(this);
2480 $('body', doc).html(self.getPrintFrameContent(self.indexToPrint));
2483 $('#printDiv').prepend(iframe);
2487 // Get print URI from current indices and mode
2488 GnuBook.prototype.getPrintURI = function() {
2490 if (this.constMode2up == this.mode) {
2491 indexToPrint = this.twoPage.currentIndexL;
2493 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2496 var options = 'id=' + this.bookId + '&server=' + this.server + '&zip=' + this.zip
2497 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2498 + '&width=' + this.getPageWidth(indexToPrint) + '&height=' + this.getPageHeight(indexToPrint);
2500 if (this.constMode2up == this.mode) {
2501 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this.getPageWidth(this.twoPage.currentIndexR);
2502 options += '&height2=' + this.getPageHeight(this.twoPage.currentIndexR);
2503 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2505 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2508 return '/bookreader/print.php?' + options;
2511 /* iframe implementation
2512 GnuBook.prototype.getPrintFrameContent = function(index) {
2513 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2514 // 8.5x11 so we should end up not overflowing on either paper size.
2515 var paperAspect = 8.5 / 11;
2516 var imageAspect = this.getPageWidth(index) / this.getPageHeight(index);
2520 // Rotate if possible and appropriate, to get larger image size on printed page
2521 if (this.canRotatePage(index)) {
2522 if (imageAspect > 1 && imageAspect > paperAspect) {
2523 // more wide than square, and more wide than paper
2525 imageAspect = 1/imageAspect;
2530 if (imageAspect > paperAspect) {
2531 // wider than paper, fit width
2532 fitAttrs = 'width="95%"';
2534 // taller than paper, fit height
2535 fitAttrs = 'height="95%"';
2538 var imageURL = this.getPageURI(index, 1, rotate);
2539 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2540 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2541 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2542 iframeStr += '</div>';
2543 iframeStr += '</body></html>';
2548 GnuBook.prototype.updatePrintFrame = function(delta) {
2549 var newIndex = this.indexToPrint + delta;
2550 newIndex = GnuBook.util.clamp(newIndex, 0, this.numLeafs - 1);
2551 if (newIndex == this.indexToPrint) {
2554 this.indexToPrint = newIndex;
2555 var doc = GnuBook.util.getIFrameDocument($('#printFrame')[0]);
2556 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2561 //______________________________________________________________________________
2562 GnuBook.prototype.showEmbedCode = function() {
2563 if (null != this.embedPopup) { // check if already showing
2567 this.embedPopup = document.createElement("div");
2568 $(this.embedPopup).css({
2569 position: 'absolute',
2571 left: ($('#GBcontainer').attr('clientWidth')-400)/2 + 'px',
2574 border: "3px double #999999",
2576 backgroundColor: "#fff"
2577 }).appendTo('#GnuBook');
2579 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
2580 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>';
2581 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
2582 htmlStr += '<p style="text-align:center;"><a href="" onclick="gb.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2584 this.embedPopup.innerHTML = htmlStr;
2585 $(this.embedPopup).find('input').bind('click', function() {
2591 //______________________________________________________________________________
2592 GnuBook.prototype.autoToggle = function() {
2594 var bComingFrom1up = false;
2595 if (2 != this.mode) {
2596 bComingFrom1up = true;
2600 // Change to autofit if book is too large
2601 if (this.reduce < this.twoPageGetAutofitReduce()) {
2606 if (null == this.autoTimer) {
2607 this.flipSpeed = 2000;
2609 // $$$ Draw events currently cause layout problems when they occur during animation.
2610 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
2611 // we workaround for now by not triggering immediate animation in that case.
2612 // See https://bugs.launchpad.net/gnubook/+bug/328327
2613 if (('rl' == this.pageProgression) && bComingFrom1up) {
2614 // don't flip immediately -- wait until timer fires
2617 this.flipFwdToIndex();
2620 $('#GBtoolbar .play').hide();
2621 $('#GBtoolbar .pause').show();
2622 this.autoTimer=setInterval(function(){
2623 if (self.animating) {return;}
2625 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
2626 self.flipBackToIndex(1); // $$$ really what we want?
2628 self.flipFwdToIndex();
2637 //______________________________________________________________________________
2638 // Stop autoplay mode, allowing animations to finish
2639 GnuBook.prototype.autoStop = function() {
2640 if (null != this.autoTimer) {
2641 clearInterval(this.autoTimer);
2642 this.flipSpeed = 'fast';
2643 $('#GBtoolbar .pause').hide();
2644 $('#GBtoolbar .play').show();
2645 this.autoTimer = null;
2649 // stopFlipAnimations
2650 //______________________________________________________________________________
2651 // Immediately stop flip animations. Callbacks are triggered.
2652 GnuBook.prototype.stopFlipAnimations = function() {
2654 this.autoStop(); // Clear timers
2656 // Stop animation, clear queue, trigger callbacks
2657 if (this.leafEdgeTmp) {
2658 $(this.leafEdgeTmp).stop(false, true);
2660 jQuery.each(this.prefetchedImgs, function() {
2661 $(this).stop(false, true);
2664 // And again since animations also queued in callbacks
2665 if (this.leafEdgeTmp) {
2666 $(this.leafEdgeTmp).stop(false, true);
2668 jQuery.each(this.prefetchedImgs, function() {
2669 $(this).stop(false, true);
2674 // keyboardNavigationIsDisabled(event)
2675 // - returns true if keyboard navigation should be disabled for the event
2676 //______________________________________________________________________________
2677 GnuBook.prototype.keyboardNavigationIsDisabled = function(event) {
2678 if (event.target.tagName == "INPUT") {
2684 // gutterOffsetForIndex
2685 //______________________________________________________________________________
2687 // Returns the gutter offset for the spread containing the given index.
2688 // This function supports RTL
2689 GnuBook.prototype.gutterOffsetForIndex = function(pindex) {
2691 // To find the offset of the gutter from the middle we calculate our percentage distance
2692 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
2693 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
2695 // But then again for RTL it's the opposite
2696 if ('rl' == this.pageProgression) {
2704 //______________________________________________________________________________
2705 // Returns the width of the leaf edge div for the page with index given
2706 GnuBook.prototype.leafEdgeWidth = function(pindex) {
2707 // $$$ could there be single pixel rounding errors for L vs R?
2708 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
2709 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
2711 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
2715 // jumpIndexForLeftEdgePageX
2716 //______________________________________________________________________________
2717 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
2718 GnuBook.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
2719 if ('rl' != this.pageProgression) {
2720 // LTR - flipping backward
2721 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
2723 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
2724 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
2728 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
2729 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
2734 // jumpIndexForRightEdgePageX
2735 //______________________________________________________________________________
2736 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
2737 GnuBook.prototype.jumpIndexForRightEdgePageX = function(pageX) {
2738 if ('rl' != this.pageProgression) {
2740 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
2741 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
2744 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
2745 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
2750 GnuBook.prototype.initToolbar = function(mode, ui) {
2752 $("#GnuBook").append("<div id='GBtoolbar'>"
2753 + "<span id='GBtoolbarbuttons' style='float: right'>"
2754 + "<button class='GBicon print rollover' /> <button class='GBicon rollover embed' />"
2755 + "<form class='GBpageform' action='javascript:' onsubmit='gb.jumpToPage(this.elements[0].value)'> <span class='label'>Page:<input id='GBpagenum' type='text' size='3' onfocus='gb.autoStop();'></input></span></form>"
2756 + "<div class='GBtoolbarmode2' style='display: none'><button class='GBicon rollover book_leftmost' /><button class='GBicon rollover book_left' /><button class='GBicon rollover book_right' /><button class='GBicon rollover book_rightmost' /></div>"
2757 + "<div class='GBtoolbarmode1' style='display: none'><button class='GBicon rollover book_top' /><button class='GBicon rollover book_up' /> <button class='GBicon rollover book_down' /><button class='GBicon rollover book_bottom' /></div>"
2758 + "<button class='GBicon rollover play' /><button class='GBicon rollover pause' style='display: none' />"
2762 + "<a class='GBicon logo rollover' href='" + this.logoURL + "'> </a>"
2763 + " <button class='GBicon rollover zoom_out' onclick='gb.zoom(-1); return false;'/>"
2764 + "<button class='GBicon rollover zoom_in' onclick='gb.zoom(1); return false;'/>"
2765 + " <span class='label'>Zoom: <span id='GBzoom'>"+parseInt(100/this.reduce)+"</span></span>"
2766 + " <button class='GBicon rollover one_page_mode' onclick='gb.switchMode(1); return false;'/>"
2767 + " <button class='GBicon rollover two_page_mode' onclick='gb.switchMode(2); return false;'/>"
2770 + "<span id='#GBbooktitle'>"
2771 + " <a class='GBblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
2775 this.updateToolbarZoom(this.reduce); // Pretty format
2777 if (ui == "embed") {
2778 $("#GnuBook a.logo").attr("target","_blank");
2781 // $$$ turn this into a member variable
2782 var jToolbar = $('#GBtoolbar'); // j prefix indicates jQuery object
2784 // We build in mode 2
2787 this.bindToolbarNavHandlers(jToolbar);
2789 // Setup tooltips -- later we could load these from a file for i18n
2790 var titles = { '.logo': 'Go to Archive.org',
2791 '.zoom_in': 'Zoom in',
2792 '.zoom_out': 'Zoom out',
2793 '.one_page_mode': 'One-page view',
2794 '.two_page_mode': 'Two-page view',
2795 '.print': 'Print this page',
2796 '.embed': 'Embed bookreader',
2797 '.book_left': 'Flip left',
2798 '.book_right': 'Flip right',
2799 '.book_up': 'Page up',
2800 '.book_down': 'Page down',
2803 '.book_top': 'First page',
2804 '.book_bottom': 'Last page'
2806 if ('rl' == this.pageProgression) {
2807 titles['.book_leftmost'] = 'Last page';
2808 titles['.book_rightmost'] = 'First page';
2810 titles['.book_leftmost'] = 'First page';
2811 titles['.book_rightmost'] = 'Last page';
2814 for (var icon in titles) {
2815 jToolbar.find(icon).attr('title', titles[icon]);
2818 // Hide mode buttons and autoplay if 2up is not available
2819 // $$$ if we end up with more than two modes we should show the applicable buttons
2820 if ( !this.canSwitchToMode(this.constMode2up) ) {
2821 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
2824 // Switch to requested mode -- binds other click handlers
2825 this.switchToolbarMode(mode);
2830 // switchToolbarMode
2831 //______________________________________________________________________________
2832 // Update the toolbar for the given mode (changes navigation buttons)
2833 // $$$ we should soon split the toolbar out into its own module
2834 GnuBook.prototype.switchToolbarMode = function(mode) {
2837 $('#GBtoolbar .GBtoolbarmode2').hide();
2838 $('#GBtoolbar .GBtoolbarmode1').show().css('display', 'inline');
2841 $('#GBtoolbar .GBtoolbarmode1').hide();
2842 $('#GBtoolbar .GBtoolbarmode2').show().css('display', 'inline');
2846 // bindToolbarNavHandlers
2847 //______________________________________________________________________________
2848 // Binds the toolbar handlers
2849 GnuBook.prototype.bindToolbarNavHandlers = function(jToolbar) {
2851 jToolbar.find('.book_left').bind('click', function(e) {
2856 jToolbar.find('.book_right').bind('click', function(e) {
2861 jToolbar.find('.book_up').bind('click', function(e) {
2866 jToolbar.find('.book_down').bind('click', function(e) {
2871 jToolbar.find('.print').bind('click', function(e) {
2876 jToolbar.find('.embed').bind('click', function(e) {
2881 jToolbar.find('.play').bind('click', function(e) {
2886 jToolbar.find('.pause').bind('click', function(e) {
2891 jToolbar.find('.book_top').bind('click', function(e) {
2896 jToolbar.find('.book_bottom').bind('click', function(e) {
2901 jToolbar.find('.book_leftmost').bind('click', function(e) {
2906 jToolbar.find('.book_rightmost').bind('click', function(e) {
2912 // updateToolbarZoom(reduce)
2913 //______________________________________________________________________________
2914 // Update the displayed zoom factor based on reduction factor
2915 GnuBook.prototype.updateToolbarZoom = function(reduce) {
2917 if (this.constMode2up == this.mode && this.twoPage.autofit) {
2920 value = (100 / reduce).toFixed(2);
2921 // Strip trailing zeroes and decimal if all zeroes
2922 value = value.replace(/0+$/,'');
2923 value = value.replace(/\.$/,'');
2926 $('#GBzoom').text(value);
2929 // firstDisplayableIndex
2930 //______________________________________________________________________________
2931 // Returns the index of the first visible page, dependent on the mode.
2932 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
2933 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
2934 GnuBook.prototype.firstDisplayableIndex = function() {
2935 if (this.mode != this.constMode2up) {
2939 if ('rl' != this.pageProgression) {
2941 if (this.getPageSide(0) == 'L') {
2948 if (this.getPageSide(0) == 'R') {
2956 // lastDisplayableIndex
2957 //______________________________________________________________________________
2958 // Returns the index of the last visible page, dependent on the mode.
2959 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
2960 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
2961 GnuBook.prototype.lastDisplayableIndex = function() {
2963 var lastIndex = this.numLeafs - 1;
2965 if (this.mode != this.constMode2up) {
2969 if ('rl' != this.pageProgression) {
2971 if (this.getPageSide(lastIndex) == 'R') {
2974 return lastIndex + 1;
2978 if (this.getPageSide(lastIndex) == 'L') {
2981 return lastIndex + 1;
2986 // shortTitle(maximumCharacters)
2988 // Returns a shortened version of the title with the maximum number of characters
2989 GnuBook.prototype.shortTitle = function(maximumCharacters) {
2990 if (this.bookTitle.length < maximumCharacters) {
2991 return this.bookTitle;
2994 var title = this.bookTitle.substr(0, maximumCharacters - 3);
2999 // Parameter related functions
3001 // updateFromParams(params)
3003 // Update ourselves from the params object.
3005 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
3006 GnuBook.prototype.updateFromParams = function(params) {
3007 if ('undefined' != typeof(params.mode)) {
3008 this.switchMode(params.mode);
3012 if ('undefined' != typeof(params.searchTerm)) {
3013 if (this.searchTerm != params.searchTerm) {
3014 this.search(params.searchTerm);
3018 // $$$ process /zoom
3020 // We only respect page if index is not set
3021 if ('undefined' != typeof(params.index)) {
3022 if (params.index != this.currentIndex()) {
3023 this.jumpToIndex(params.index);
3025 } else if ('undefined' != typeof(params.page)) {
3026 // $$$ this assumes page numbers are unique
3027 if (params.page != this.getPageNum(this.currentIndex())) {
3028 this.jumpToPage(params.page);
3032 // $$$ process /region
3033 // $$$ process /highlight
3036 // paramsFromFragment(urlFragment)
3038 // Returns a object with configuration parametes from a URL fragment.
3040 // E.g paramsFromFragment(window.location.hash)
3041 GnuBook.prototype.paramsFromFragment = function(urlFragment) {
3042 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
3046 // For convenience we allow an initial # character (as from window.location.hash)
3047 // but don't require it
3048 if (urlFragment.substr(0,1) == '#') {
3049 urlFragment = urlFragment.substr(1);
3052 // Simple #nn syntax
3053 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3054 if ( !isNaN(oldStyleLeafNum) ) {
3055 params.index = oldStyleLeafNum;
3057 // Done processing if using old-style syntax
3061 // Split into key-value pairs
3062 var urlArray = urlFragment.split('/');
3064 for (var i = 0; i < urlArray.length; i += 2) {
3065 urlHash[urlArray[i]] = urlArray[i+1];
3069 if ('1up' == urlHash['mode']) {
3070 params.mode = this.constMode1up;
3071 } else if ('2up' == urlHash['mode']) {
3072 params.mode = this.constMode2up;
3076 if ('undefined' != typeof(urlHash['page'])) {
3077 // page was set -- may not be int
3078 params.page = urlHash['page'];
3081 // $$$ process /region
3082 // $$$ process /search
3084 if (urlHash['search'] != undefined) {
3085 params.searchTerm = GnuBook.util.decodeURIComponentPlus(urlHash['search']);
3088 // $$$ process /highlight
3093 // paramsFromCurrent()
3095 // Create a params object from the current parameters.
3096 GnuBook.prototype.paramsFromCurrent = function() {
3100 var index = this.currentIndex();
3101 var pageNum = this.getPageNum(index);
3102 if ((pageNum === 0) || pageNum) {
3103 params.page = pageNum;
3106 params.index = index;
3107 params.mode = this.mode;
3113 if (this.searchHighlightVisible()) {
3114 params.searchTerm = this.searchTerm;
3120 // fragmentFromParams(params)
3122 // Create a fragment string from the params object.
3123 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3124 GnuBook.prototype.fragmentFromParams = function(params) {
3125 var separator = '/';
3129 if ('undefined' != typeof(params.page)) {
3130 fragments.push('page', params.page);
3132 // Don't have page numbering -- use index instead
3133 fragments.push('page', 'n' + params.index);
3140 if ('undefined' != typeof(params.mode)) {
3141 if (params.mode == this.constMode1up) {
3142 fragments.push('mode', '1up');
3143 } else if (params.mode == this.constMode2up) {
3144 fragments.push('mode', '2up');
3146 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3151 if (params.searchTerm) {
3152 fragments.push('search', params.searchTerm);
3155 return GnuBook.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3158 // getPageIndex(pageNum)
3160 // Returns the *highest* index the given page number, or undefined
3161 GnuBook.prototype.getPageIndex = function(pageNum) {
3162 var pageIndices = this.getPageIndices(pageNum);
3164 if (pageIndices.length > 0) {
3165 return pageIndices[pageIndices.length - 1];
3171 // getPageIndices(pageNum)
3173 // Returns an array (possibly empty) of the indices with the given page number
3174 GnuBook.prototype.getPageIndices = function(pageNum) {
3177 // Check for special "nXX" page number
3178 if (pageNum.slice(0,1) == 'n') {
3180 var pageIntStr = pageNum.slice(1, pageNum.length);
3181 var pageIndex = parseInt(pageIntStr);
3182 indices.push(pageIndex);
3185 // Do nothing... will run through page names and see if one matches
3190 for (i=0; i<this.numLeafs; i++) {
3191 if (this.getPageNum(i) == pageNum) {
3199 // getPageName(index)
3201 // Returns the name of the page as it should be displayed in the user interface
3202 GnuBook.prototype.getPageName = function(index) {
3203 return 'Page ' + this.getPageNum(index);
3206 // updateLocationHash
3208 // Update the location hash from the current parameters. Call this instead of manually
3209 // using window.location.replace
3210 GnuBook.prototype.updateLocationHash = function() {
3211 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3212 window.location.replace(newHash);
3214 // This is the variable checked in the timer. Only user-generated changes
3215 // to the URL will trigger the event.
3216 this.oldLocationHash = newHash;
3219 // startLocationPolling
3221 // Starts polling of window.location to see hash fragment changes
3222 GnuBook.prototype.startLocationPolling = function() {
3223 var self = this; // remember who I am
3224 self.oldLocationHash = window.location.hash;
3226 if (this.locationPollId) {
3227 clearInterval(this.locationPollID);
3228 this.locationPollId = null;
3231 this.locationPollId = setInterval(function() {
3232 var newHash = window.location.hash;
3233 if (newHash != self.oldLocationHash) {
3234 if (newHash != self.oldUserHash) { // Only process new user hash once
3235 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3237 // Queue change if animating
3238 if (self.animating) {
3240 self.animationFinishedCallback = function() {
3241 self.updateFromParams(self.paramsFromFragment(newHash));
3243 } else { // update immediately
3244 self.updateFromParams(self.paramsFromFragment(newHash));
3246 self.oldUserHash = newHash;
3254 // Returns true if we can switch to the requested mode
3255 GnuBook.prototype.canSwitchToMode = function(mode) {
3256 if (mode == this.constMode2up) {
3257 // check there are enough pages to display
3258 // $$$ this is a workaround for the mis-feature that we can't display
3259 // short books in 2up mode
3260 if (this.numLeafs < 6) {
3268 // searchHighlightVisible
3270 // Returns true if a search highlight is currently being displayed
3271 GnuBook.prototype.searchHighlightVisible = function() {
3272 if (this.constMode2up == this.mode) {
3273 if (this.searchResults[this.twoPage.currentIndexL]
3274 || this.searchResults[this.twoPage.currentIndexR]) {
3278 if (this.searchResults[this.currentIndex()]) {
3285 // getPageBackgroundColor
3287 // Returns a CSS property string for the background color for the given page
3288 // $$$ turn into regular CSS?
3289 GnuBook.prototype.getPageBackgroundColor = function(index) {
3290 if (index >= 0 && index < this.numLeafs) {
3292 return this.pageDefaultBackgroundColor;
3298 // Library functions
3300 clamp: function(value, min, max) {
3301 return Math.min(Math.max(value, min), max);
3304 getIFrameDocument: function(iframe) {
3305 // Adapted from http://xkr.us/articles/dom/iframe-document/
3306 var outer = (iframe.contentWindow || iframe.contentDocument);
3307 return (outer.document || outer);
3310 decodeURIComponentPlus: function(value) {
3311 // Decodes a URI component and converts '+' to ' '
3312 return decodeURIComponent(value).replace(/\+/g, ' ');
3315 encodeURIComponentPlus: function(value) {
3316 // Encodes a URI component and converts ' ' to '+'
3317 return encodeURIComponent(value).replace(/%20/g, '+');
3319 // The final property here must NOT have a comma after it - IE7