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
85 //______________________________________________________________________________
86 GnuBook.prototype.init = function() {
88 var startIndex = undefined;
90 // Find start index and mode if set in location hash
91 var params = this.paramsFromFragment(window.location.hash);
93 if ('undefined' != typeof(params.index)) {
94 startIndex = params.index;
95 } else if ('undefined' != typeof(params.page)) {
96 startIndex = this.getPageIndex(params.page);
99 if ('undefined' == typeof(startIndex)) {
100 if ('undefined' != typeof(this.titleLeaf)) {
101 startIndex = this.leafNumToIndex(this.titleLeaf);
105 if ('undefined' == typeof(startIndex)) {
109 if ('undefined' != typeof(params.mode)) {
110 this.mode = params.mode;
113 // Set document title -- may have already been set in enclosing html for
114 // search engine visibility
115 document.title = this.shortTitle(50);
117 // Sanitize parameters
118 if ( !this.canSwitchToMode( this.mode ) ) {
119 this.mode = this.constMode1up;
122 $("#GnuBook").empty();
123 this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
124 $("#GnuBook").append("<div id='GBcontainer'></div>");
125 $("#GBcontainer").append("<div id='GBpageview'></div>");
127 $("#GBcontainer").bind('scroll', this, function(e) {
131 this.setupKeyListeners();
132 this.startLocationPolling();
134 $(window).bind('resize', this, function(e) {
135 //console.log('resize!');
136 if (1 == e.data.mode) {
137 //console.log('centering 1page view');
138 e.data.centerPageView();
139 $('#GBpageview').empty()
140 e.data.displayedIndices = [];
141 e.data.updateSearchHilites(); //deletes hilights but does not call remove()
144 //console.log('drawing 2 page view');
146 // We only need to prepare again in autofit (size of spread changes)
147 if (e.data.twoPage.autofit) {
148 e.data.prepareTwoPageView();
150 // Re-center if the scrollbars have disappeared
151 var center = e.data.twoPageGetViewCenter();
152 var doRecenter = false;
153 if (e.data.twoPage.totalWidth < $('#GBcontainer').attr('clientWidth')) {
154 center.percentageX = 0.5;
157 if (e.data.twoPage.totalHeight < $('#GBcontainer').attr('clientHeight')) {
158 center.percentageY = 0.5;
162 e.data.twoPageCenterView(center.percentageX, center.percentageY);
168 $('.GBpagediv1up').bind('mousedown', this, function(e) {
169 // $$$ the purpose of this is to disable selection of the image (makes it turn blue)
170 // but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
173 if (1 == this.mode) {
174 this.resizePageView();
175 this.firstIndex = startIndex;
176 this.jumpToIndex(startIndex);
178 //this.resizePageView();
180 this.displayedIndices=[0];
181 this.firstIndex = startIndex;
182 this.displayedIndices = [this.firstIndex];
183 //console.log('titleLeaf: %d', this.titleLeaf);
184 //console.log('displayedIndices: %s', this.displayedIndices);
185 this.prepareTwoPageView();
188 // Enact other parts of initial params
189 this.updateFromParams(params);
192 GnuBook.prototype.setupKeyListeners = function() {
205 // We use document here instead of window to avoid a bug in jQuery on IE7
206 $(document).keydown(function(e) {
207 // Keyboard navigation
211 // In 1up mode page scrolling is handled by browser
212 if (2 == self.mode) {
219 if (2 == self.mode) {
233 if (self.keyboardNavigationIsDisabled(e)) {
237 if (2 == self.mode) {
243 if (self.keyboardNavigationIsDisabled(e)) {
247 if (2 == self.mode) {
257 //______________________________________________________________________________
258 GnuBook.prototype.drawLeafs = function() {
259 if (1 == this.mode) {
260 this.drawLeafsOnePage();
262 this.drawLeafsTwoPage();
267 //______________________________________________________________________________
268 GnuBook.prototype.setDragHandler = function(div) {
269 div.dragging = false;
271 $(div).unbind('mousedown').bind('mousedown', function(e) {
274 //console.log('mousedown at ' + e.pageY);
276 this.dragging = true;
277 this.prevMouseX = e.pageX;
278 this.prevMouseY = e.pageY;
280 var startX = e.pageX;
281 var startY = e.pageY;
282 var startTop = $('#GBcontainer').attr('scrollTop');
283 var startLeft = $('#GBcontainer').attr('scrollLeft');
287 $(div).unbind('mousemove').bind('mousemove', function(ee) {
290 // console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
292 var offsetX = ee.pageX - this.prevMouseX;
293 var offsetY = ee.pageY - this.prevMouseY;
296 $('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
297 $('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
300 this.prevMouseX = ee.pageX;
301 this.prevMouseY = ee.pageY;
305 $(div).unbind('mouseup').bind('mouseup', function(ee) {
307 //console.log('mouseup');
309 this.dragging = false;
312 $(div).unbind('mouseleave').bind('mouseleave', function(e) {
314 //console.log('mouseleave');
316 this.dragging = false;
319 $(div).unbind('mouseenter').bind('mouseenter', function(e) {
321 //console.log('mouseenter');
323 this.dragging = false;
327 // setDragHandler2UP()
328 //______________________________________________________________________________
329 GnuBook.prototype.setDragHandler2UP = function(div) {
330 div.dragging = false;
332 $(div).unbind('mousedown').bind('mousedown', function(e) {
335 //console.log('mousedown at ' + e.pageY);
337 this.dragStart = {x: e.pageX, y: e.pageY };
338 this.mouseDown = true;
339 this.dragging = false; // wait until drag distance
340 this.prevMouseX = e.pageX;
341 this.prevMouseY = e.pageY;
343 var startX = e.pageX;
344 var startY = e.pageY;
345 var startTop = $('#GBcontainer').attr('scrollTop');
346 var startLeft = $('#GBcontainer').attr('scrollLeft');
350 $(div).unbind('mousemove').bind('mousemove', function(ee) {
353 // console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
355 var offsetX = ee.pageX - this.prevMouseX;
356 var offsetY = ee.pageY - this.prevMouseY;
358 var minDragDistance = 5; // $$$ constant
360 var distance = Math.max(Math.abs(offsetX), Math.abs(offsetY));
362 if (this.mouseDown && (distance > minDragDistance)) {
363 //console.log('drag start!');
365 this.dragging = true;
369 $('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
370 $('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
371 this.prevMouseX = ee.pageX;
372 this.prevMouseY = ee.pageY;
379 $(div).unbind('mouseup').bind('mouseup', function(ee) {
381 //console.log('mouseup');
383 this.dragging = false;
384 this.mouseDown = false;
389 $(div).unbind('mouseleave').bind('mouseleave', function(e) {
391 //console.log('mouseleave');
393 this.dragging = false;
394 this.mouseDown = false;
397 $(div).unbind('mouseenter').bind('mouseenter', function(e) {
399 //console.log('mouseenter');
401 this.dragging = false;
402 this.mouseDown = false;
406 GnuBook.prototype.setClickHandler2UP = function( element, data, handler) {
407 //console.log('setting handler');
408 //console.log(element.tagName);
410 $(element).unbind('click').bind('click', data, function(e) {
413 //console.log('click!');
415 if (this.mouseDown && (!this.dragging)) {
416 //console.log('click not dragging!');
420 this.dragging = false;
421 this.mouseDown = false;
425 // drawLeafsOnePage()
426 //______________________________________________________________________________
427 GnuBook.prototype.drawLeafsOnePage = function() {
428 //alert('drawing leafs!');
432 var scrollTop = $('#GBcontainer').attr('scrollTop');
433 var scrollBottom = scrollTop + $('#GBcontainer').height();
434 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
436 var indicesToDisplay = [];
441 for (i=0; i<this.numLeafs; i++) {
442 var height = parseInt(this.getPageHeight(i)/this.reduce);
444 leafBottom += height;
445 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
446 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
447 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
448 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
449 if (topInView | bottomInView | middleInView) {
450 //console.log('displayed: ' + this.displayedIndices);
451 //console.log('to display: ' + i);
452 indicesToDisplay.push(i);
454 leafTop += height +10;
458 var firstIndexToDraw = indicesToDisplay[0];
459 this.firstIndex = firstIndexToDraw;
461 // Update hash, but only if we're currently displaying a leaf
462 // Hack that fixes #365790
463 if (this.displayedIndices.length > 0) {
464 this.updateLocationHash();
467 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
469 indicesToDisplay.unshift(firstIndexToDraw);
472 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
473 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
474 indicesToDisplay.push(lastIndexToDraw+1);
479 for (i=0; i<firstIndexToDraw; i++) {
480 leafTop += parseInt(this.getPageHeight(i)/this.reduce) +10;
483 //var viewWidth = $('#GBpageview').width(); //includes scroll bar width
484 var viewWidth = $('#GBcontainer').attr('scrollWidth');
487 for (i=0; i<indicesToDisplay.length; i++) {
488 var index = indicesToDisplay[i];
489 var height = parseInt(this.getPageHeight(index)/this.reduce);
491 if(-1 == jQuery.inArray(indicesToDisplay[i], this.displayedIndices)) {
492 var width = parseInt(this.getPageWidth(index)/this.reduce);
493 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
494 var div = document.createElement("div");
495 div.className = 'GBpagediv1up';
496 div.id = 'pagediv'+index;
497 div.style.position = "absolute";
498 $(div).css('top', leafTop + 'px');
499 var left = (viewWidth-width)>>1;
500 if (left<0) left = 0;
501 $(div).css('left', left+'px');
502 $(div).css('width', width+'px');
503 $(div).css('height', height+'px');
504 //$(div).text('loading...');
506 this.setDragHandler(div);
508 $('#GBpageview').append(div);
510 var img = document.createElement("img");
511 img.src = this.getPageURI(index, this.reduce, 0);
512 $(img).css('width', width+'px');
513 $(img).css('height', height+'px');
517 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
520 leafTop += height +10;
524 for (i=0; i<this.displayedIndices.length; i++) {
525 if (-1 == jQuery.inArray(this.displayedIndices[i], indicesToDisplay)) {
526 var index = this.displayedIndices[i];
527 //console.log('Removing leaf ' + index);
528 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
529 $('#pagediv'+index).remove();
531 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
535 this.displayedIndices = indicesToDisplay.slice();
536 this.updateSearchHilites();
538 if (null != this.getPageNum(firstIndexToDraw)) {
539 $("#GBpagenum").val(this.getPageNum(this.currentIndex()));
541 $("#GBpagenum").val('');
544 this.updateToolbarZoom(this.reduce);
548 // drawLeafsTwoPage()
549 //______________________________________________________________________________
550 GnuBook.prototype.drawLeafsTwoPage = function() {
551 var scrollTop = $('#GBtwopageview').attr('scrollTop');
552 var scrollBottom = scrollTop + $('#GBtwopageview').height();
554 // $$$ we should use calculated values in this.twoPage (recalc if necessary)
556 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: 'rgb(234, 226, 205)',
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: 'rgb(234, 226, 205)',
600 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
601 width: this.twoPage.scaledWR + 'px',
602 borderLeft: '1px solid black',
604 }).appendTo('#GBtwopageview');
607 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
608 this.setMouseHandlers2UP();
609 this.twoPageSetCursor();
611 this.updatePageNumBox2UP();
612 this.updateToolbarZoom(this.reduce);
614 // this.twoPagePlaceFlipAreas(); // No longer used
618 // updatePageNumBox2UP
619 //______________________________________________________________________________
620 GnuBook.prototype.updatePageNumBox2UP = function() {
621 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
622 $("#GBpagenum").val(this.getPageNum(this.twoPage.currentIndexL));
624 $("#GBpagenum").val('');
626 this.updateLocationHash();
630 //______________________________________________________________________________
631 GnuBook.prototype.loadLeafs = function() {
635 if (null == this.timer) {
636 this.timer=setTimeout(function(){self.drawLeafs()},250);
638 clearTimeout(this.timer);
639 this.timer=setTimeout(function(){self.drawLeafs()},250);
645 // Pass 1 to zoom in, anything else to zoom out
646 //______________________________________________________________________________
647 GnuBook.prototype.zoom = function(direction) {
649 case this.constMode1up:
650 return this.zoom1up(direction);
651 case this.constMode2up:
652 return this.zoom2up(direction);
657 //______________________________________________________________________________
658 GnuBook.prototype.zoom1up = function(dir) {
659 if (2 == this.mode) { //can only zoom in 1-page mode
664 // $$$ with flexible zoom we could "snap" to /2 page reductions
665 // for better scaling
667 if (this.reduce <= 0.5) return;
668 this.reduce*=0.5; //zoom in
670 if (this.reduce >= 8) return;
671 this.reduce*=2; //zoom out
674 this.resizePageView();
676 $('#GBpageview').empty()
677 this.displayedIndices = [];
680 this.updateToolbarZoom(this.reduce);
684 //______________________________________________________________________________
685 GnuBook.prototype.resizePageView = function() {
688 //var viewWidth = $('#GBcontainer').width(); //includes scrollBar
689 var viewWidth = $('#GBcontainer').attr('clientWidth');
691 var oldScrollTop = $('#GBcontainer').attr('scrollTop');
692 var oldScrollLeft = $('#GBcontainer').attr('scrollLeft');
693 var oldPageViewHeight = $('#GBpageview').height();
694 var oldPageViewWidth = $('#GBpageview').width();
696 var oldCenterY = this.centerY1up();
697 var oldCenterX = this.centerX1up();
699 if (0 != oldPageViewHeight) {
700 var scrollRatio = oldCenterY / oldPageViewHeight;
705 for (i=0; i<this.numLeafs; i++) {
706 viewHeight += parseInt(this.getPageHeight(i)/this.reduce) + this.padding;
707 var width = parseInt(this.getPageWidth(i)/this.reduce);
708 if (width>viewWidth) viewWidth=width;
710 $('#GBpageview').height(viewHeight);
711 $('#GBpageview').width(viewWidth);
713 var newCenterY = scrollRatio*viewHeight;
714 var newTop = Math.max(0, Math.floor( newCenterY - $('#GBcontainer').height()/2 ));
715 $('#GBcontainer').attr('scrollTop', newTop);
717 // We use clientWidth here to avoid miscalculating due to scroll bar
718 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
719 var newLeft = newCenterX - $('#GBcontainer').attr('clientWidth') / 2;
720 newLeft = Math.max(newLeft, 0);
721 $('#GBcontainer').attr('scrollLeft', newLeft);
722 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
724 //this.centerPageView();
730 //______________________________________________________________________________
731 // Returns the current offset of the viewport center in scaled document coordinates.
732 GnuBook.prototype.centerX1up = function() {
734 if ($('#GBpageview').width() < $('#GBcontainer').attr('clientWidth')) { // fully shown
735 centerX = $('#GBpageview').width();
737 centerX = $('#GBcontainer').attr('scrollLeft') + $('#GBcontainer').attr('clientWidth') / 2;
739 centerX = Math.floor(centerX);
744 //______________________________________________________________________________
745 // Returns the current offset of the viewport center in scaled document coordinates.
746 GnuBook.prototype.centerY1up = function() {
747 var centerY = $('#GBcontainer').attr('scrollTop') + $('#GBcontainer').height() / 2;
748 return Math.floor(centerY);
752 //______________________________________________________________________________
753 GnuBook.prototype.centerPageView = function() {
755 var scrollWidth = $('#GBcontainer').attr('scrollWidth');
756 var clientWidth = $('#GBcontainer').attr('clientWidth');
757 //console.log('sW='+scrollWidth+' cW='+clientWidth);
758 if (scrollWidth > clientWidth) {
759 $('#GBcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
764 // zoom2up(direction)
765 //______________________________________________________________________________
766 GnuBook.prototype.zoom2up = function(direction) {
768 // Hard stop autoplay
769 this.stopFlipAnimations();
771 // Get new zoom state
772 var newZoom = this.twoPageNextReduce(this.reduce, direction);
773 if ((this.reduce == newZoom.reduce) && (this.twoPage.autofit == newZoom.autofit)) {
776 this.twoPage.autofit = newZoom.autofit;
777 this.reduce = newZoom.reduce;
779 // Preserve view center position
780 var oldCenter = this.twoPageGetViewCenter();
782 // If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
783 // $$$ An improvement would be to use the low res image until the larger one is loaded.
784 if (1 == direction) {
785 for (var img in this.prefetchedImgs) {
786 delete this.prefetchedImgs[img];
790 // Prepare view with new center to minimize visual glitches
791 this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
795 // quantizeReduce(reduce)
796 //______________________________________________________________________________
797 // Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
798 GnuBook.prototype.quantizeReduce = function(reduce) {
799 var quantized = this.reductionFactors[0];
800 var distance = Math.abs(reduce - quantized);
801 for (var i = 1; i < this.reductionFactors.length; i++) {
802 newDistance = Math.abs(reduce - this.reductionFactors[i]);
803 if (newDistance < distance) {
804 distance = newDistance;
805 quantized = this.reductionFactors[i];
812 // twoPageNextReduce()
813 //______________________________________________________________________________
814 // Returns the next reduction level
815 GnuBook.prototype.twoPageNextReduce = function(reduce, direction) {
817 var autofitReduce = this.twoPageGetAutofitReduce();
819 if (0 == direction) { // autofit
820 result.autofit = true;
821 result.reduce = autofitReduce;
823 } else if (1 == direction) { // zoom in
824 var newReduce = this.reductionFactors[0];
826 for (var i = 1; i < this.reductionFactors.length; i++) {
827 if (this.reductionFactors[i] < reduce) {
828 newReduce = this.reductionFactors[i];
832 if (!this.twoPage.autofit && (autofitReduce < reduce && autofitReduce > newReduce)) {
834 result.autofit = true;
835 result.reduce = autofitReduce;
837 result.autofit = false;
838 result.reduce = newReduce;
842 var lastIndex = this.reductionFactors.length - 1;
843 var newReduce = this.reductionFactors[lastIndex];
845 for (var i = lastIndex; i >= 0; i--) {
846 if (this.reductionFactors[i] > reduce) {
847 newReduce = this.reductionFactors[i];
851 if (!this.twoPage.autofit && (autofitReduce > reduce && autofitReduce < newReduce)) {
853 result.autofit = true;
854 result.reduce = autofitReduce;
856 result.autofit = false;
857 result.reduce = newReduce;
865 //______________________________________________________________________________
866 // Attempts to jump to page. Returns true if page could be found, false otherwise.
867 GnuBook.prototype.jumpToPage = function(pageNum) {
869 var pageIndex = this.getPageIndex(pageNum);
871 if ('undefined' != typeof(pageIndex)) {
874 this.jumpToIndex(pageIndex);
875 $('#GBcontainer').attr('scrollTop', leafTop);
884 //______________________________________________________________________________
885 GnuBook.prototype.jumpToIndex = function(index) {
887 if (2 == this.mode) {
890 // By checking against min/max we do nothing if requested index
892 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
893 this.flipBackToIndex(index);
894 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
895 this.flipFwdToIndex(index);
902 for (i=0; i<index; i++) {
903 h = parseInt(this.getPageHeight(i)/this.reduce);
904 leafTop += h + this.padding;
906 //$('#GBcontainer').attr('scrollTop', leafTop);
907 $('#GBcontainer').animate({scrollTop: leafTop },'fast');
914 //______________________________________________________________________________
915 GnuBook.prototype.switchMode = function(mode) {
917 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
919 if (mode == this.mode) return;
921 if (!this.canSwitchToMode(mode)) {
926 this.removeSearchHilites();
930 this.switchToolbarMode(mode);
932 // $$$ TODO preserve center of view when switching between mode
933 // See https://bugs.edge.launchpad.net/gnubook/+bug/416682
936 this.reduce = this.quantizeReduce(this.reduce);
937 this.prepareOnePageView();
939 this.twoPage.autofit = false; // Take zoom level from other mode
940 this.reduce = this.quantizeReduce(this.reduce);
941 this.prepareTwoPageView();
942 this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
947 //prepareOnePageView()
948 //______________________________________________________________________________
949 GnuBook.prototype.prepareOnePageView = function() {
951 // var startLeaf = this.displayedIndices[0];
952 var startLeaf = this.currentIndex();
954 $('#GBcontainer').empty();
955 $('#GBcontainer').css({
960 var gbPageView = $("#GBcontainer").append("<div id='GBpageview'></div>");
962 this.resizePageView();
964 this.jumpToIndex(startLeaf);
965 this.displayedIndices = [];
967 this.drawLeafsOnePage();
969 // Bind mouse handlers
970 // Disable mouse click to avoid selected/highlighted page images - bug 354239
971 gbPageView.bind('mousedown', function(e) {
972 // $$$ check here for right-click and don't disable. Also use jQuery style
973 // for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
976 // Special hack for IE7
977 gbPageView[0].onselectstart = function(e) { return false; };
980 // prepareTwoPageView()
981 //______________________________________________________________________________
982 // Some decisions about two page view:
984 // Both pages will be displayed at the same height, even if they were different physical/scanned
985 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
986 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
987 // aspect ratio to determine the height.
989 // The two page view div is resized to keep the middle of the book in the middle of the div
990 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the GBcontent
991 // div requires adjusting the offset of GBtwpageview and/or scrolling in GBcontent.
992 GnuBook.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
993 $('#GBcontainer').empty();
994 $('#GBcontainer').css('overflow', 'auto');
996 // We want to display two facing pages. We may be missing
997 // one side of the spread because it is the first/last leaf,
998 // foldouts, missing pages, etc
1000 //var targetLeaf = this.displayedIndices[0];
1001 var targetLeaf = this.firstIndex;
1003 if (targetLeaf < this.firstDisplayableIndex()) {
1004 targetLeaf = this.firstDisplayableIndex();
1007 if (targetLeaf > this.lastDisplayableIndex()) {
1008 targetLeaf = this.lastDisplayableIndex();
1011 //this.twoPage.currentIndexL = null;
1012 //this.twoPage.currentIndexR = null;
1013 //this.pruneUnusedImgs();
1015 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
1016 this.twoPage.currentIndexL = currentSpreadIndices[0];
1017 this.twoPage.currentIndexR = currentSpreadIndices[1];
1018 this.firstIndex = this.twoPage.currentIndexL;
1020 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
1022 this.pruneUnusedImgs();
1023 this.prefetch(); // Preload images or reload if scaling has changed
1025 //console.dir(this.twoPage);
1027 // Add the two page view
1028 // $$$ Can we get everything set up and then append?
1029 $('#GBcontainer').append('<div id="GBtwopageview"></div>');
1031 // $$$ calculate first then set
1032 $('#GBtwopageview').css( {
1033 height: this.twoPage.totalHeight + 'px',
1034 width: this.twoPage.totalWidth + 'px',
1035 position: 'absolute'
1038 // If there will not be scrollbars (e.g. when zooming out) we center the book
1039 // since otherwise the book will be stuck off-center
1040 if (this.twoPage.totalWidth < $('#GBcontainer').attr('clientWidth')) {
1041 centerPercentageX = 0.5;
1043 if (this.twoPage.totalHeight < $('#GBcontainer').attr('clientHeight')) {
1044 centerPercentageY = 0.5;
1047 this.twoPageCenterView(centerPercentageX, centerPercentageY);
1049 this.twoPage.coverDiv = document.createElement('div');
1050 $(this.twoPage.coverDiv).attr('id', 'GBbookcover').css({
1051 border: '1px solid rgb(68, 25, 17)',
1052 width: this.twoPage.bookCoverDivWidth + 'px',
1053 height: this.twoPage.bookCoverDivHeight+'px',
1054 visibility: 'visible',
1055 position: 'absolute',
1056 backgroundColor: '#663929',
1057 left: this.twoPage.bookCoverDivLeft + 'px',
1058 top: this.twoPage.bookCoverDivTop+'px',
1059 MozBorderRadiusTopleft: '7px',
1060 MozBorderRadiusTopright: '7px',
1061 MozBorderRadiusBottomright: '7px',
1062 MozBorderRadiusBottomleft: '7px'
1063 }).appendTo('#GBtwopageview');
1065 this.leafEdgeR = document.createElement('div');
1066 this.leafEdgeR.className = 'leafEdgeR'; // $$$ the static CSS should be moved into the .css file
1067 $(this.leafEdgeR).css({
1068 borderStyle: 'solid solid solid none',
1069 borderColor: 'rgb(51, 51, 34)',
1070 borderWidth: '1px 1px 1px 0px',
1071 background: 'transparent url(' + this.imagesBaseURL + 'right_edges.png) repeat scroll 0% 0%',
1072 width: this.twoPage.leafEdgeWidthR + 'px',
1073 height: this.twoPage.height-1 + 'px',
1075 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
1076 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1077 position: 'absolute'
1078 }).appendTo('#GBtwopageview');
1080 this.leafEdgeL = document.createElement('div');
1081 this.leafEdgeL.className = 'leafEdgeL';
1082 $(this.leafEdgeL).css({ // $$$ static CSS should be moved to file
1083 borderStyle: 'solid none solid solid',
1084 borderColor: 'rgb(51, 51, 34)',
1085 borderWidth: '1px 0px 1px 1px',
1086 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1087 width: this.twoPage.leafEdgeWidthL + 'px',
1088 height: this.twoPage.height-1 + 'px',
1089 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
1090 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
1091 position: 'absolute'
1092 }).appendTo('#GBtwopageview');
1094 div = document.createElement('div');
1095 $(div).attr('id', 'GBbookspine').css({
1096 border: '1px solid rgb(68, 25, 17)',
1097 width: this.twoPage.bookSpineDivWidth+'px',
1098 height: this.twoPage.bookSpineDivHeight+'px',
1099 position: 'absolute',
1100 backgroundColor: 'rgb(68, 25, 17)',
1101 left: this.twoPage.bookSpineDivLeft+'px',
1102 top: this.twoPage.bookSpineDivTop+'px'
1103 }).appendTo('#GBtwopageview');
1105 var self = this; // for closure
1107 /* Flip areas no longer used
1108 this.twoPage.leftFlipArea = document.createElement('div');
1109 this.twoPage.leftFlipArea.className = 'GBfliparea';
1110 $(this.twoPage.leftFlipArea).attr('id', 'GBleftflip').css({
1112 width: this.twoPageFlipAreaWidth() + 'px',
1113 height: this.twoPageFlipAreaHeight() + 'px',
1114 position: 'absolute',
1115 left: this.twoPageLeftFlipAreaLeft() + 'px',
1116 top: this.twoPageFlipAreaTop() + 'px',
1119 }).bind('click', function(e) {
1121 }).bind('mousedown', function(e) {
1123 }).appendTo('#GBtwopageview');
1125 this.twoPage.rightFlipArea = document.createElement('div');
1126 this.twoPage.rightFlipArea.className = 'GBfliparea';
1127 $(this.twoPage.rightFlipArea).attr('id', 'GBrightflip').css({
1129 width: this.twoPageFlipAreaWidth() + 'px',
1130 height: this.twoPageFlipAreaHeight() + 'px',
1131 position: 'absolute',
1132 left: this.twoPageRightFlipAreaLeft() + 'px',
1133 top: this.twoPageFlipAreaTop() + 'px',
1136 }).bind('click', function(e) {
1138 }).bind('mousedown', function(e) {
1140 }).appendTo('#GBtwopageview');
1143 this.prepareTwoPagePopUp();
1145 this.displayedIndices = [];
1147 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
1148 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
1150 this.drawLeafsTwoPage();
1151 this.updateSearchHilites2UP();
1152 this.updateToolbarZoom(this.reduce);
1157 // prepareTwoPagePopUp()
1159 // This function prepares the "View Page n" popup that shows while the mouse is
1160 // over the left/right "stack of sheets" edges. It also binds the mouse
1161 // events for these divs.
1162 //______________________________________________________________________________
1163 GnuBook.prototype.prepareTwoPagePopUp = function() {
1165 this.twoPagePopUp = document.createElement('div');
1166 $(this.twoPagePopUp).css({
1167 border: '1px solid black',
1169 position: 'absolute',
1170 fontFamily: 'sans-serif',
1173 backgroundColor: 'rgb(255, 255, 238)',
1175 }).appendTo('#GBcontainer');
1176 $(this.twoPagePopUp).hide();
1178 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
1179 $(e.data.twoPagePopUp).show();
1182 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
1183 $(e.data.twoPagePopUp).hide();
1186 $(this.leafEdgeL).bind('click', this, function(e) {
1188 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1189 e.data.jumpToIndex(jumpIndex);
1192 $(this.leafEdgeR).bind('click', this, function(e) {
1194 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1195 e.data.jumpToIndex(jumpIndex);
1198 $(this.leafEdgeR).bind('mousemove', this, function(e) {
1200 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
1201 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
1203 // $$$ TODO: Make sure popup is positioned so that it is in view
1204 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1205 $(e.data.twoPagePopUp).css({
1206 left: e.pageX- $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() + 20 + 'px',
1207 top: e.pageY - $('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
1211 $(this.leafEdgeL).bind('mousemove', this, function(e) {
1213 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
1214 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
1216 // $$$ TODO: Make sure popup is positioned so that it is in view
1217 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
1218 $(e.data.twoPagePopUp).css({
1219 left: e.pageX - $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
1220 top: e.pageY-$('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
1225 // calculateSpreadSize()
1226 //______________________________________________________________________________
1227 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
1228 // this.twoPage.currentIndexR
1229 // This function sets this.twoPage.height, twoPage.width
1231 GnuBook.prototype.calculateSpreadSize = function() {
1233 var firstIndex = this.twoPage.currentIndexL;
1234 var secondIndex = this.twoPage.currentIndexR;
1235 //console.log('first page is ' + firstIndex);
1237 // Calculate page sizes and total leaf width
1239 if ( this.twoPage.autofit) {
1240 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
1242 // set based on reduction factor
1243 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
1246 // Both pages together
1247 this.twoPage.height = spreadSize.height;
1248 this.twoPage.width = spreadSize.width;
1251 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
1252 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
1255 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
1256 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1257 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
1261 // The width of the book cover div. The combined width of both pages, twice the width
1262 // of the book cover internal padding (2*10) and the page edges
1263 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
1264 // The height of the book cover div
1265 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
1268 // We calculate the total width and height for the div so that we can make the book
1270 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
1271 var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
1272 var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
1273 var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
1274 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1275 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1277 // We want to minimize the unused space in two-up mode (maximize the amount of page
1278 // shown). We give width to the leaf edges and these widths change (though the sum
1279 // of the two remains constant) as we flip through the book. With the book
1280 // cover centered and fixed in the GBcontainer div the page images will meet
1281 // at the "gutter" which is generally offset from the center.
1282 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1283 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1285 // The left edge of the book cover moves depending on the width of the pages
1286 // $$$ change to getter
1287 this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
1288 // The top edge of the book cover stays a fixed distance from the top
1289 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
1292 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1293 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1294 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1297 this.reduce = spreadSize.reduce; // $$$ really set this here?
1300 GnuBook.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1303 // We check which page is closest to a "normal" page and use that to set the height
1304 // for both pages. This means that foldouts and other odd size pages will be displayed
1305 // smaller than the nominal zoom amount.
1306 var canon5Dratio = 1.5;
1309 height: this.getPageHeight(firstIndex),
1310 width: this.getPageWidth(firstIndex)
1314 height: this.getPageHeight(secondIndex),
1315 width: this.getPageWidth(secondIndex)
1318 var firstIndexRatio = first.height / first.width;
1319 var secondIndexRatio = second.height / second.width;
1320 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1323 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1324 ratio = firstIndexRatio;
1325 //console.log('using firstIndexRatio ' + ratio);
1327 ratio = secondIndexRatio;
1328 //console.log('using secondIndexRatio ' + ratio);
1331 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1332 var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1);
1333 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1335 var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
1336 var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1338 ideal.width = ($('#GBcontainer').width() - widthOutsidePages) >> 1;
1339 ideal.width -= 10; // $$$ fudge factor
1340 ideal.height = $('#GBcontainer').height() - heightOutsidePages;
1341 ideal.height -= 20; // fudge factor
1342 //console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
1344 if (ideal.height/ratio <= ideal.width) {
1346 ideal.width = parseInt(ideal.height/ratio);
1349 ideal.height = parseInt(ideal.width*ratio);
1352 // $$$ check this logic with large spreads
1353 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1358 // getSpreadSizeFromReduce()
1359 //______________________________________________________________________________
1360 // Returns the spread size calculated from the reduction factor for the given pages
1361 GnuBook.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1362 var spreadSize = {};
1363 // $$$ Scale this based on reduce?
1364 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1365 var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
1366 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1368 // $$$ Possibly incorrect -- we should make height "dominant"
1369 var nativeWidth = this.getPageWidth(firstIndex) + this.getPageWidth(secondIndex);
1370 var nativeHeight = this.getPageHeight(firstIndex) + this.getPageHeight(secondIndex);
1371 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1372 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1373 spreadSize.reduce = reduce;
1378 // twoPageGetAutofitReduce()
1379 //______________________________________________________________________________
1380 // Returns the current ideal reduction factor
1381 GnuBook.prototype.twoPageGetAutofitReduce = function() {
1382 var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
1383 return spreadSize.reduce;
1386 // twoPageSetCursor()
1387 //______________________________________________________________________________
1388 // Set the cursor for two page view
1389 GnuBook.prototype.twoPageSetCursor = function() {
1390 // console.log('setting cursor');
1391 if ( ($('#GBtwopageview').width() > $('#GBcontainer').attr('clientWidth')) ||
1392 ($('#GBtwopageview').height() > $('#GBcontainer').attr('clientHeight')) ) {
1393 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
1394 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
1396 $(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
1397 $(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
1402 //______________________________________________________________________________
1403 // Returns the currently active index.
1404 GnuBook.prototype.currentIndex = function() {
1405 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1406 if (this.mode == this.constMode1up || this.mode == this.constMode2up) {
1407 return this.firstIndex;
1409 throw 'currentIndex called for unimplemented mode ' + this.mode;
1414 //______________________________________________________________________________
1415 // Flip the right page over onto the left
1416 GnuBook.prototype.right = function() {
1417 if ('rl' != this.pageProgression) {
1427 //______________________________________________________________________________
1428 // Flip to the rightmost page
1429 GnuBook.prototype.rightmost = function() {
1430 if ('rl' != this.pageProgression) {
1438 //______________________________________________________________________________
1439 // Flip the left page over onto the right.
1440 GnuBook.prototype.left = function() {
1441 if ('rl' != this.pageProgression) {
1451 //______________________________________________________________________________
1452 // Flip to the leftmost page
1453 GnuBook.prototype.leftmost = function() {
1454 if ('rl' != this.pageProgression) {
1462 //______________________________________________________________________________
1463 GnuBook.prototype.next = function() {
1464 if (2 == this.mode) {
1466 this.flipFwdToIndex(null);
1468 if (this.firstIndex < this.lastDisplayableIndex()) {
1469 this.jumpToIndex(this.firstIndex+1);
1475 //______________________________________________________________________________
1476 GnuBook.prototype.prev = function() {
1477 if (2 == this.mode) {
1479 this.flipBackToIndex(null);
1481 if (this.firstIndex >= 1) {
1482 this.jumpToIndex(this.firstIndex-1);
1487 GnuBook.prototype.first = function() {
1488 if (2 == this.mode) {
1489 this.jumpToIndex(2);
1492 this.jumpToIndex(0);
1496 GnuBook.prototype.last = function() {
1497 if (2 == this.mode) {
1498 this.jumpToIndex(this.lastDisplayableIndex());
1501 this.jumpToIndex(this.lastDisplayableIndex());
1505 // flipBackToIndex()
1506 //______________________________________________________________________________
1507 // to flip back one spread, pass index=null
1508 GnuBook.prototype.flipBackToIndex = function(index) {
1509 if (1 == this.mode) return;
1511 var leftIndex = this.twoPage.currentIndexL;
1513 // $$$ Need to change this to be able to see first spread.
1514 // See https://bugs.launchpad.net/gnubook/+bug/296788
1515 if (leftIndex <= 2) return;
1516 if (this.animating) return;
1518 if (null != this.leafEdgeTmp) {
1519 alert('error: leafEdgeTmp should be null!');
1523 if (null == index) {
1524 index = leftIndex-2;
1526 //if (index<0) return;
1528 var previousIndices = this.getSpreadIndices(index);
1530 if (previousIndices[0] < 0 || previousIndices[1] < 0) {
1534 //console.log("flipping back to " + previousIndices[0] + ',' + previousIndices[1]);
1536 this.animating = true;
1538 if ('rl' != this.pageProgression) {
1539 // Assume LTR and we are going backward
1540 this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1541 this.flipLeftToRight(previousIndices[0], previousIndices[1]);
1543 // RTL and going backward
1544 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1545 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
1549 // flipLeftToRight()
1550 //______________________________________________________________________________
1551 // Flips the page on the left towards the page on the right
1552 GnuBook.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
1554 var leftLeaf = this.twoPage.currentIndexL;
1556 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1557 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1558 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
1560 var currWidthL = this.getPageWidth2UP(leftLeaf);
1561 var newWidthL = this.getPageWidth2UP(newIndexL);
1562 var newWidthR = this.getPageWidth2UP(newIndexR);
1564 var top = this.twoPageTop();
1565 var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
1567 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
1568 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
1570 //animation strategy:
1571 // 0. remove search highlight, if any.
1572 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
1573 // of the left leaf and where the user clicked in the leaf edge.
1574 // Note that if this function was triggered by left() and not a
1575 // mouse click, the width of leafEdgeTmp is very small (zero px).
1576 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
1577 // leftLeaf to width=0.
1578 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
1579 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
1580 // its new full width.
1581 // 4. After step 3 is finished, do the following:
1582 // - remove leafEdgeTmp from the dom.
1583 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
1584 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
1585 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
1586 // and width=newLeafEdgeWidthL.
1587 // - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
1588 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
1589 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
1590 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
1591 // - prefetch new adjacent leafs.
1592 // - set up click handlers for both new left and right leafs.
1593 // - redraw the search highlight.
1594 // - update the pagenum box and the url.
1597 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
1599 this.leafEdgeTmp = document.createElement('div');
1600 $(this.leafEdgeTmp).css({
1601 borderStyle: 'solid none solid solid',
1602 borderColor: 'rgb(51, 51, 34)',
1603 borderWidth: '1px 0px 1px 1px',
1604 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1605 width: leafEdgeTmpW + 'px',
1606 height: this.twoPage.height-1 + 'px',
1607 left: leftEdgeTmpLeft + 'px',
1609 position: 'absolute',
1611 }).appendTo('#GBtwopageview');
1613 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
1614 $(this.leafEdgeL).css({
1615 width: newLeafEdgeWidthL+'px',
1616 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
1619 // Left gets the offset of the current left leaf from the document
1620 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
1621 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
1622 var right = $('#GBtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#GBtwopageview').offset().left-2+'px';
1624 // We change the left leaf to right positioning
1625 // $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
1626 $(this.prefetchedImgs[leftLeaf]).css({
1631 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
1632 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
1636 this.removeSearchHilites();
1638 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
1639 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
1641 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
1642 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
1644 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
1645 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
1646 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
1648 $(self.leafEdgeR).css({
1649 // Moves the right leaf edge
1650 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
1651 left: gutter+newWidthR+'px'
1654 $(self.leafEdgeL).css({
1655 // Moves and resizes the left leaf edge
1656 width: newLeafEdgeWidthL+'px',
1657 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
1660 // Resizes the brown border div
1661 $(self.twoPage.coverDiv).css({
1662 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
1663 left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
1666 $(self.leafEdgeTmp).remove();
1667 self.leafEdgeTmp = null;
1669 // $$$ TODO refactor with opposite direction flip
1671 self.twoPage.currentIndexL = newIndexL;
1672 self.twoPage.currentIndexR = newIndexR;
1673 self.twoPage.scaledWL = newWidthL;
1674 self.twoPage.scaledWR = newWidthR;
1675 self.twoPage.gutter = gutter;
1677 self.firstIndex = self.twoPage.currentIndexL;
1678 self.displayedIndices = [newIndexL, newIndexR];
1679 self.pruneUnusedImgs();
1681 self.animating = false;
1683 self.updateSearchHilites2UP();
1684 self.updatePageNumBox2UP();
1686 // self.twoPagePlaceFlipAreas(); // No longer used
1687 self.setMouseHandlers2UP();
1688 self.twoPageSetCursor();
1690 if (self.animationFinishedCallback) {
1691 self.animationFinishedCallback();
1692 self.animationFinishedCallback = null;
1700 //______________________________________________________________________________
1701 // Whether we flip left or right is dependent on the page progression
1702 // to flip forward one spread, pass index=null
1703 GnuBook.prototype.flipFwdToIndex = function(index) {
1705 if (this.animating) return;
1707 if (null != this.leafEdgeTmp) {
1708 alert('error: leafEdgeTmp should be null!');
1712 if (null == index) {
1713 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
1715 if (index > this.lastDisplayableIndex()) return;
1717 this.animating = true;
1719 var nextIndices = this.getSpreadIndices(index);
1721 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
1723 if ('rl' != this.pageProgression) {
1724 // We did not specify RTL
1725 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
1726 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
1729 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
1730 this.flipLeftToRight(nextIndices[0], nextIndices[1]);
1734 // flipRightToLeft(nextL, nextR, gutter)
1735 // $$$ better not to have to pass gutter in
1736 //______________________________________________________________________________
1737 // Flip from left to right and show the nextL and nextR indices on those sides
1738 GnuBook.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
1739 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1740 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
1741 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1742 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
1744 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
1746 var top = this.twoPageTop();
1747 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
1749 var middle = this.twoPage.middle;
1750 var gutter = middle + this.gutterOffsetForIndex(newIndexL);
1752 this.leafEdgeTmp = document.createElement('div');
1753 $(this.leafEdgeTmp).css({
1754 borderStyle: 'solid none solid solid',
1755 borderColor: 'rgb(51, 51, 34)',
1756 borderWidth: '1px 0px 1px 1px',
1757 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1758 width: leafEdgeTmpW + 'px',
1759 height: this.twoPage.height-1 + 'px',
1760 left: gutter+scaledW+'px',
1762 position: 'absolute',
1764 }).appendTo('#GBtwopageview');
1766 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
1767 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
1769 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
1770 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
1771 var newWidthL = this.getPageWidth2UP(newIndexL);
1772 var newWidthR = this.getPageWidth2UP(newIndexR);
1774 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
1776 var self = this; // closure-tastic!
1778 var speed = this.flipSpeed;
1780 this.removeSearchHilites();
1782 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
1783 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
1784 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
1785 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
1786 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
1788 $(self.leafEdgeL).css({
1789 width: newLeafEdgeWidthL+'px',
1790 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
1793 // Resizes the book cover
1794 $(self.twoPage.coverDiv).css({
1795 width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
1796 left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
1799 $(self.leafEdgeTmp).remove();
1800 self.leafEdgeTmp = null;
1802 self.twoPage.currentIndexL = newIndexL;
1803 self.twoPage.currentIndexR = newIndexR;
1804 self.twoPage.scaledWL = newWidthL;
1805 self.twoPage.scaledWR = newWidthR;
1806 self.twoPage.gutter = gutter;
1808 self.firstIndex = self.twoPage.currentIndexL;
1809 self.displayedIndices = [newIndexL, newIndexR];
1810 self.pruneUnusedImgs();
1812 self.animating = false;
1815 self.updateSearchHilites2UP();
1816 self.updatePageNumBox2UP();
1818 // self.twoPagePlaceFlipAreas(); // No longer used
1819 self.setMouseHandlers2UP();
1820 self.twoPageSetCursor();
1822 if (self.animationFinishedCallback) {
1823 self.animationFinishedCallback();
1824 self.animationFinishedCallback = null;
1830 // setMouseHandlers2UP
1831 //______________________________________________________________________________
1832 GnuBook.prototype.setMouseHandlers2UP = function() {
1834 $(this.prefetchedImgs[this.twoPage.currentIndexL]).bind('dblclick', function() {
1839 $(this.prefetchedImgs[this.twoPage.currentIndexR]).bind('dblclick', function() {
1846 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL] );
1847 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
1854 this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR] );
1855 this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
1858 e.data.self.right();
1864 //______________________________________________________________________________
1865 GnuBook.prototype.prefetchImg = function(index) {
1866 var pageURI = this.getPageURI(index);
1868 // Load image if not loaded or URI has changed (e.g. due to scaling)
1869 var loadImage = false;
1870 if (undefined == this.prefetchedImgs[index]) {
1871 //console.log('no image for ' + index);
1873 } else if (pageURI != this.prefetchedImgs[index].uri) {
1874 //console.log('uri changed for ' + index);
1879 //console.log('prefetching ' + index);
1880 var img = document.createElement("img");
1882 img.uri = pageURI; // browser may rewrite src so we stash raw URI here
1883 this.prefetchedImgs[index] = img;
1888 // prepareFlipLeftToRight()
1890 //______________________________________________________________________________
1892 // Prepare to flip the left page towards the right. This corresponds to moving
1893 // backward when the page progression is left to right.
1894 GnuBook.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
1896 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
1898 this.prefetchImg(prevL);
1899 this.prefetchImg(prevR);
1901 var height = this.getPageHeight(prevL);
1902 var width = this.getPageWidth(prevL);
1903 var middle = this.twoPage.middle;
1904 var top = this.twoPageTop();
1905 var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
1907 // The gutter is the dividing line between the left and right pages.
1908 // It is offset from the middle to create the illusion of thickness to the pages
1909 var gutter = middle + this.gutterOffsetForIndex(prevL);
1911 //console.log(' gutter for ' + prevL + ' is ' + gutter);
1912 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
1913 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
1915 $(this.prefetchedImgs[prevL]).css({
1916 position: 'absolute',
1917 left: gutter-scaledW+'px',
1918 right: '', // clear right property
1920 backgroundColor: 'rgb(234, 226, 205)',
1921 height: this.twoPage.height,
1922 width: scaledW+'px',
1923 borderRight: '1px solid black',
1927 $('#GBtwopageview').append(this.prefetchedImgs[prevL]);
1929 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
1931 $(this.prefetchedImgs[prevR]).css({
1932 position: 'absolute',
1936 backgroundColor: 'rgb(234, 226, 205)',
1937 height: this.twoPage.height,
1939 borderLeft: '1px solid black',
1943 $('#GBtwopageview').append(this.prefetchedImgs[prevR]);
1947 // $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
1948 // prepareFlipRightToLeft()
1949 //______________________________________________________________________________
1950 GnuBook.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
1952 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
1955 this.prefetchImg(nextL);
1956 this.prefetchImg(nextR);
1958 var height = this.getPageHeight(nextR);
1959 var width = this.getPageWidth(nextR);
1960 var middle = this.twoPage.middle;
1961 var top = this.twoPageTop();
1962 var scaledW = this.twoPage.height*width/height;
1964 var gutter = middle + this.gutterOffsetForIndex(nextL);
1966 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
1967 $(this.prefetchedImgs[nextR]).css({
1968 position: 'absolute',
1971 backgroundColor: 'rgb(234, 226, 205)',
1972 height: this.twoPage.height,
1973 width: scaledW+'px',
1974 borderLeft: '1px solid black',
1978 $('#GBtwopageview').append(this.prefetchedImgs[nextR]);
1980 height = this.getPageHeight(nextL);
1981 width = this.getPageWidth(nextL);
1982 scaledW = this.twoPage.height*width/height;
1984 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#GBcontainer').width()-gutter);
1985 $(this.prefetchedImgs[nextL]).css({
1986 position: 'absolute',
1987 right: $('#GBtwopageview').attr('clientWidth')-gutter+'px',
1989 backgroundColor: 'rgb(234, 226, 205)',
1990 height: this.twoPage.height,
1991 width: 0+'px', // Start at 0 width, then grow to the left
1992 borderRight: '1px solid black',
1996 $('#GBtwopageview').append(this.prefetchedImgs[nextL]);
2000 // getNextLeafs() -- NOT RTL AWARE
2001 //______________________________________________________________________________
2002 // GnuBook.prototype.getNextLeafs = function(o) {
2003 // //TODO: we might have two left or two right leafs in a row (damaged book)
2004 // //For now, assume that leafs are contiguous.
2006 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
2007 // o.L = this.twoPage.currentIndexL+2;
2008 // o.R = this.twoPage.currentIndexL+3;
2011 // getprevLeafs() -- NOT RTL AWARE
2012 //______________________________________________________________________________
2013 // GnuBook.prototype.getPrevLeafs = function(o) {
2014 // //TODO: we might have two left or two right leafs in a row (damaged book)
2015 // //For now, assume that leafs are contiguous.
2017 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
2018 // o.L = this.twoPage.currentIndexL-2;
2019 // o.R = this.twoPage.currentIndexL-1;
2022 // pruneUnusedImgs()
2023 //______________________________________________________________________________
2024 GnuBook.prototype.pruneUnusedImgs = function() {
2025 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
2026 for (var key in this.prefetchedImgs) {
2027 //console.log('key is ' + key);
2028 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
2029 //console.log('removing key '+ key);
2030 $(this.prefetchedImgs[key]).remove();
2032 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
2033 //console.log('deleting key '+ key);
2034 delete this.prefetchedImgs[key];
2040 //______________________________________________________________________________
2041 GnuBook.prototype.prefetch = function() {
2043 // prefetch visible pages first
2044 this.prefetchImg(this.twoPage.currentIndexL);
2045 this.prefetchImg(this.twoPage.currentIndexR);
2047 var adjacentPagesToLoad = 3;
2049 var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2050 var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
2052 var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
2053 var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
2055 // Load images spreading out from current
2056 for (var i = 1; i <= adjacentPagesToLoad; i++) {
2057 var goingDown = lowCurrent - i;
2058 if (goingDown >= start) {
2059 this.prefetchImg(goingDown);
2061 var goingUp = highCurrent + i;
2062 if (goingUp <= end) {
2063 this.prefetchImg(goingUp);
2068 var lim = this.twoPage.currentIndexL-4;
2070 lim = Math.max(lim, 0);
2071 for (i = lim; i < this.twoPage.currentIndexL; i++) {
2072 this.prefetchImg(i);
2075 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
2076 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
2077 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
2078 this.prefetchImg(i);
2084 // getPageWidth2UP()
2085 //______________________________________________________________________________
2086 GnuBook.prototype.getPageWidth2UP = function(index) {
2087 // We return the width based on the dominant height
2088 var height = this.getPageHeight(index);
2089 var width = this.getPageWidth(index);
2090 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
2094 //______________________________________________________________________________
2095 GnuBook.prototype.search = function(term) {
2096 this.searchTerm = term;
2097 $('#GnuBookSearchScript').remove();
2098 var script = document.createElement("script");
2099 script.setAttribute('id', 'GnuBookSearchScript');
2100 script.setAttribute("type", "text/javascript");
2101 script.setAttribute("src", 'http://'+this.server+'/GnuBook/flipbook_search_gb.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=gb.GBSearchCallback');
2102 document.getElementsByTagName('head')[0].appendChild(script);
2103 $('#GnuBookSearchBox').val(term);
2104 $('#GnuBookSearchResults').html('Searching...');
2107 // GBSearchCallback()
2108 //______________________________________________________________________________
2109 GnuBook.prototype.GBSearchCallback = function(txt) {
2111 if (jQuery.browser.msie) {
2112 var dom=new ActiveXObject("Microsoft.XMLDOM");
2116 var parser = new DOMParser();
2117 var dom = parser.parseFromString(txt, "text/xml");
2120 $('#GnuBookSearchResults').empty();
2121 $('#GnuBookSearchResults').append('<ul>');
2123 for (var key in this.searchResults) {
2124 if (null != this.searchResults[key].div) {
2125 $(this.searchResults[key].div).remove();
2127 delete this.searchResults[key];
2130 var pages = dom.getElementsByTagName('PAGE');
2132 if (0 == pages.length) {
2133 // $$$ it would be nice to echo the (sanitized) search result here
2134 $('#GnuBookSearchResults').append('<li>No search results found</li>');
2136 for (var i = 0; i < pages.length; i++){
2137 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
2140 var re = new RegExp (/_(\d{4})/);
2141 var reMatch = re.exec(pages[i].getAttribute('file'));
2142 var index = parseInt(reMatch[1], 10);
2143 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
2145 var children = pages[i].childNodes;
2147 for (var j=0; j<children.length; j++) {
2148 //console.log(j + ' - ' + children[j].nodeName);
2149 //console.log(children[j].firstChild.nodeValue);
2150 if ('CONTEXT' == children[j].nodeName) {
2151 context += children[j].firstChild.nodeValue;
2152 } else if ('WORD' == children[j].nodeName) {
2153 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
2155 var index = this.leafNumToIndex(index);
2156 if (null != index) {
2157 //coordinates are [left, bottom, right, top, [baseline]]
2158 //we'll skip baseline for now...
2159 var coords = children[j].getAttribute('coords').split(',',4);
2160 if (4 == coords.length) {
2161 this.searchResults[index] = {'l':coords[0], 'b':coords[1], 'r':coords[2], 't':coords[3], 'div':null};
2166 var pageName = this.getPageName(index);
2167 //TODO: remove hardcoded instance name
2168 $('#GnuBookSearchResults').append('<li><b><a href="javascript:gb.jumpToIndex('+index+');">' + pageName + '</a></b> - ' + context + '</li>');
2171 $('#GnuBookSearchResults').append('</ul>');
2173 this.updateSearchHilites();
2176 // updateSearchHilites()
2177 //______________________________________________________________________________
2178 GnuBook.prototype.updateSearchHilites = function() {
2179 if (2 == this.mode) {
2180 this.updateSearchHilites2UP();
2182 this.updateSearchHilites1UP();
2186 // showSearchHilites1UP()
2187 //______________________________________________________________________________
2188 GnuBook.prototype.updateSearchHilites1UP = function() {
2190 for (var key in this.searchResults) {
2192 if (-1 != jQuery.inArray(parseInt(key), this.displayedIndices)) {
2193 var result = this.searchResults[key];
2194 if(null == result.div) {
2195 result.div = document.createElement('div');
2196 $(result.div).attr('className', 'GnuBookSearchHilite').appendTo('#pagediv'+key);
2197 //console.log('appending ' + key);
2200 width: (result.r-result.l)/this.reduce + 'px',
2201 height: (result.b-result.t)/this.reduce + 'px',
2202 left: (result.l)/this.reduce + 'px',
2203 top: (result.t)/this.reduce +'px'
2207 //console.log(key + ' not displayed');
2208 this.searchResults[key].div=null;
2214 //______________________________________________________________________________
2215 // Returns the position of the gutter (line between the page images)
2216 GnuBook.prototype.twoPageGutter = function() {
2217 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
2221 //______________________________________________________________________________
2222 // Returns the offset for the top of the page images
2223 GnuBook.prototype.twoPageTop = function() {
2224 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
2227 // twoPageCoverWidth()
2228 //______________________________________________________________________________
2229 // Returns the width of the cover div given the total page width
2230 GnuBook.prototype.twoPageCoverWidth = function(totalPageWidth) {
2231 return totalPageWidth + this.twoPage.edgeWidth + 2*this.twoPage.coverInternalPadding;
2234 // twoPageGetViewCenter()
2235 //______________________________________________________________________________
2236 // Returns the percentage offset into twopageview div at the center of container div
2237 // { percentageX: float, percentageY: float }
2238 GnuBook.prototype.twoPageGetViewCenter = function() {
2241 var containerOffset = $('#GBcontainer').offset();
2242 var viewOffset = $('#GBtwopageview').offset();
2243 center.percentageX = (containerOffset.left - viewOffset.left + ($('#GBcontainer').attr('clientWidth') >> 1)) / this.twoPage.totalWidth;
2244 center.percentageY = (containerOffset.top - viewOffset.top + ($('#GBcontainer').attr('clientHeight') >> 1)) / this.twoPage.totalHeight;
2249 // twoPageCenterView(percentageX, percentageY)
2250 //______________________________________________________________________________
2251 // Centers the point given by percentage from left,top of twopageview
2252 GnuBook.prototype.twoPageCenterView = function(percentageX, percentageY) {
2253 if ('undefined' == typeof(percentageX)) {
2256 if ('undefined' == typeof(percentageY)) {
2260 var viewWidth = $('#GBtwopageview').width();
2261 var containerClientWidth = $('#GBcontainer').attr('clientWidth');
2262 var intoViewX = percentageX * viewWidth;
2264 var viewHeight = $('#GBtwopageview').height();
2265 var containerClientHeight = $('#GBcontainer').attr('clientHeight');
2266 var intoViewY = percentageY * viewHeight;
2268 if (viewWidth < containerClientWidth) {
2269 // Can fit width without scrollbars - center by adjusting offset
2270 $('#GBtwopageview').css('left', (containerClientWidth >> 1) - intoViewX + 'px');
2272 // Need to scroll to center
2273 $('#GBtwopageview').css('left', 0);
2274 $('#GBcontainer').scrollLeft(intoViewX - (containerClientWidth >> 1));
2277 if (viewHeight < containerClientHeight) {
2278 // Fits with scrollbars - add offset
2279 $('#GBtwopageview').css('top', (containerClientHeight >> 1) - intoViewY + 'px');
2281 $('#GBtwopageview').css('top', 0);
2282 $('#GBcontainer').scrollTop(intoViewY - (containerClientHeight >> 1));
2286 // twoPageFlipAreaHeight
2287 //______________________________________________________________________________
2288 // Returns the integer height of the click-to-flip areas at the edges of the book
2289 GnuBook.prototype.twoPageFlipAreaHeight = function() {
2290 return parseInt(this.twoPage.height);
2293 // twoPageFlipAreaWidth
2294 //______________________________________________________________________________
2295 // Returns the integer width of the flip areas
2296 GnuBook.prototype.twoPageFlipAreaWidth = function() {
2297 var max = 100; // $$$ TODO base on view width?
2300 var width = this.twoPage.width * 0.15;
2301 return parseInt(GnuBook.util.clamp(width, min, max));
2304 // twoPageFlipAreaTop
2305 //______________________________________________________________________________
2306 // Returns integer top offset for flip areas
2307 GnuBook.prototype.twoPageFlipAreaTop = function() {
2308 return parseInt(this.twoPage.bookCoverDivTop + this.twoPage.coverInternalPadding);
2311 // twoPageLeftFlipAreaLeft
2312 //______________________________________________________________________________
2313 // Left offset for left flip area
2314 GnuBook.prototype.twoPageLeftFlipAreaLeft = function() {
2315 return parseInt(this.twoPage.gutter - this.twoPage.scaledWL);
2318 // twoPageRightFlipAreaLeft
2319 //______________________________________________________________________________
2320 // Left offset for right flip area
2321 GnuBook.prototype.twoPageRightFlipAreaLeft = function() {
2322 return parseInt(this.twoPage.gutter + this.twoPage.scaledWR - this.twoPageFlipAreaWidth());
2325 // twoPagePlaceFlipAreas
2326 //______________________________________________________________________________
2327 // Readjusts position of flip areas based on current layout
2328 GnuBook.prototype.twoPagePlaceFlipAreas = function() {
2329 // We don't set top since it shouldn't change relative to view
2330 $(this.twoPage.leftFlipArea).css({
2331 left: this.twoPageLeftFlipAreaLeft() + 'px',
2332 width: this.twoPageFlipAreaWidth() + 'px'
2334 $(this.twoPage.rightFlipArea).css({
2335 left: this.twoPageRightFlipAreaLeft() + 'px',
2336 width: this.twoPageFlipAreaWidth() + 'px'
2340 // showSearchHilites2UP()
2341 //______________________________________________________________________________
2342 GnuBook.prototype.updateSearchHilites2UP = function() {
2344 for (var key in this.searchResults) {
2345 key = parseInt(key, 10);
2346 if (-1 != jQuery.inArray(key, this.displayedIndices)) {
2347 var result = this.searchResults[key];
2348 if(null == result.div) {
2349 result.div = document.createElement('div');
2350 $(result.div).attr('className', 'GnuBookSearchHilite').css('zIndex', 3).appendTo('#GBtwopageview');
2351 //console.log('appending ' + key);
2354 // We calculate the reduction factor for the specific page because it can be different
2355 // for each page in the spread
2356 var height = this.getPageHeight(key);
2357 var width = this.getPageWidth(key)
2358 var reduce = this.twoPage.height/height;
2359 var scaledW = parseInt(width*reduce);
2361 var gutter = this.twoPageGutter();
2363 if ('L' == this.getPageSide(key)) {
2364 pageL = gutter-scaledW;
2368 var pageT = this.twoPageTop();
2371 width: (result.r-result.l)*reduce + 'px',
2372 height: (result.b-result.t)*reduce + 'px',
2373 left: pageL+(result.l)*reduce + 'px',
2374 top: pageT+(result.t)*reduce +'px'
2378 //console.log(key + ' not displayed');
2379 if (null != this.searchResults[key].div) {
2380 //console.log('removing ' + key);
2381 $(this.searchResults[key].div).remove();
2383 this.searchResults[key].div=null;
2388 // removeSearchHilites()
2389 //______________________________________________________________________________
2390 GnuBook.prototype.removeSearchHilites = function() {
2391 for (var key in this.searchResults) {
2392 if (null != this.searchResults[key].div) {
2393 $(this.searchResults[key].div).remove();
2394 this.searchResults[key].div=null;
2400 //______________________________________________________________________________
2401 GnuBook.prototype.printPage = function() {
2402 window.open(this.getPrintURI(), 'printpage', 'width=400, height=500, resizable=yes, scrollbars=no, toolbar=no, location=no');
2404 /* iframe implementation
2406 if (null != this.printPopup) { // check if already showing
2409 this.printPopup = document.createElement("div");
2410 $(this.printPopup).css({
2411 position: 'absolute',
2413 left: ($('#GBcontainer').width()-400)/2 + 'px',
2416 border: "3px double #999999",
2418 backgroundColor: "#fff"
2419 }).appendTo('#GnuBook');
2422 if (this.constMode1up == this.mode) {
2423 indexToPrint = this.firstIndex;
2425 indexToPrint = this.twoPage.currentIndexL;
2428 this.indexToPrint = indexToPrint;
2430 var htmlStr = '<div style="text-align: center;">';
2431 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>';
2432 htmlStr += '<div id="printDiv" name="printDiv" style="text-align: center; width: 233px; margin: auto">'
2433 htmlStr += '<p style="text-align:right; margin: 0; font-size: 0.85em">';
2434 //htmlStr += '<button class="GBicon rollover book_up" onclick="gb.updatePrintFrame(-1); return false;"></button> ';
2435 //htmlStr += '<button class="GBicon rollover book_down" onclick="gb.updatePrintFrame(1); return false;"></button>';
2436 htmlStr += '<a href="#" onclick="gb.updatePrintFrame(-1); return false;">Prev</a> <a href="#" onclick="gb.updatePrintFrame(1); return false;">Next</a>';
2438 htmlStr += '</div>';
2439 htmlStr += '<p style="text-align:center;"><a href="" onclick="gb.printPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2440 htmlStr += '</div>';
2442 this.printPopup.innerHTML = htmlStr;
2444 var iframe = document.createElement('iframe');
2445 iframe.id = 'printFrame';
2446 iframe.name = 'printFrame';
2447 iframe.width = '233px'; // 8.5 x 11 aspect
2448 iframe.height = '300px';
2450 var self = this; // closure
2452 $(iframe).load(function() {
2453 var doc = GnuBook.util.getIFrameDocument(this);
2454 $('body', doc).html(self.getPrintFrameContent(self.indexToPrint));
2457 $('#printDiv').prepend(iframe);
2461 // Get print URI from current indices and mode
2462 GnuBook.prototype.getPrintURI = function() {
2464 if (this.constMode2up == this.mode) {
2465 indexToPrint = this.twoPage.currentIndexL;
2467 indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
2470 var options = 'id=' + this.bookId + '&server=' + this.server + '&zip=' + this.zip
2471 + '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
2472 + '&width=' + this.getPageWidth(indexToPrint) + '&height=' + this.getPageHeight(indexToPrint);
2474 if (this.constMode2up == this.mode) {
2475 options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this.getPageWidth(this.twoPage.currentIndexR);
2476 options += '&height2=' + this.getPageHeight(this.twoPage.currentIndexR);
2477 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
2479 options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
2482 return '/bookreader/print.php?' + options;
2485 /* iframe implementation
2486 GnuBook.prototype.getPrintFrameContent = function(index) {
2487 // We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
2488 // 8.5x11 so we should end up not overflowing on either paper size.
2489 var paperAspect = 8.5 / 11;
2490 var imageAspect = this.getPageWidth(index) / this.getPageHeight(index);
2494 // Rotate if possible and appropriate, to get larger image size on printed page
2495 if (this.canRotatePage(index)) {
2496 if (imageAspect > 1 && imageAspect > paperAspect) {
2497 // more wide than square, and more wide than paper
2499 imageAspect = 1/imageAspect;
2504 if (imageAspect > paperAspect) {
2505 // wider than paper, fit width
2506 fitAttrs = 'width="95%"';
2508 // taller than paper, fit height
2509 fitAttrs = 'height="95%"';
2512 var imageURL = this.getPageURI(index, 1, rotate);
2513 var iframeStr = '<html style="padding: 0; border: 0; margin: 0"><head><title>' + this.bookTitle + '</title></head><body style="padding: 0; border:0; margin: 0">';
2514 iframeStr += '<div style="text-align: center; width: 99%; height: 99%; overflow: hidden;">';
2515 iframeStr += '<img src="' + imageURL + '" ' + fitAttrs + ' />';
2516 iframeStr += '</div>';
2517 iframeStr += '</body></html>';
2522 GnuBook.prototype.updatePrintFrame = function(delta) {
2523 var newIndex = this.indexToPrint + delta;
2524 newIndex = GnuBook.util.clamp(newIndex, 0, this.numLeafs - 1);
2525 if (newIndex == this.indexToPrint) {
2528 this.indexToPrint = newIndex;
2529 var doc = GnuBook.util.getIFrameDocument($('#printFrame')[0]);
2530 $('body', doc).html(this.getPrintFrameContent(this.indexToPrint));
2535 //______________________________________________________________________________
2536 GnuBook.prototype.showEmbedCode = function() {
2537 if (null != this.embedPopup) { // check if already showing
2541 this.embedPopup = document.createElement("div");
2542 $(this.embedPopup).css({
2543 position: 'absolute',
2545 left: ($('#GBcontainer').attr('clientWidth')-400)/2 + 'px',
2548 border: "3px double #999999",
2550 backgroundColor: "#fff"
2551 }).appendTo('#GnuBook');
2553 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
2554 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>';
2555 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
2556 htmlStr += '<p style="text-align:center;"><a href="" onclick="gb.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
2558 this.embedPopup.innerHTML = htmlStr;
2559 $(this.embedPopup).find('input').bind('click', function() {
2565 //______________________________________________________________________________
2566 GnuBook.prototype.autoToggle = function() {
2568 var bComingFrom1up = false;
2569 if (2 != this.mode) {
2570 bComingFrom1up = true;
2574 // Change to autofit if book is too large
2575 if (this.reduce < this.twoPageGetAutofitReduce()) {
2580 if (null == this.autoTimer) {
2581 this.flipSpeed = 2000;
2583 // $$$ Draw events currently cause layout problems when they occur during animation.
2584 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
2585 // we workaround for now by not triggering immediate animation in that case.
2586 // See https://bugs.launchpad.net/gnubook/+bug/328327
2587 if (('rl' == this.pageProgression) && bComingFrom1up) {
2588 // don't flip immediately -- wait until timer fires
2591 this.flipFwdToIndex();
2594 $('#GBtoolbar .play').hide();
2595 $('#GBtoolbar .pause').show();
2596 this.autoTimer=setInterval(function(){
2597 if (self.animating) {return;}
2599 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
2600 self.flipBackToIndex(1); // $$$ really what we want?
2602 self.flipFwdToIndex();
2611 //______________________________________________________________________________
2612 // Stop autoplay mode, allowing animations to finish
2613 GnuBook.prototype.autoStop = function() {
2614 if (null != this.autoTimer) {
2615 clearInterval(this.autoTimer);
2616 this.flipSpeed = 'fast';
2617 $('#GBtoolbar .pause').hide();
2618 $('#GBtoolbar .play').show();
2619 this.autoTimer = null;
2623 // stopFlipAnimations
2624 //______________________________________________________________________________
2625 // Immediately stop flip animations. Callbacks are triggered.
2626 GnuBook.prototype.stopFlipAnimations = function() {
2628 this.autoStop(); // Clear timers
2630 // Stop animation, clear queue, trigger callbacks
2631 if (this.leafEdgeTmp) {
2632 $(this.leafEdgeTmp).stop(false, true);
2634 jQuery.each(this.prefetchedImgs, function() {
2635 $(this).stop(false, true);
2638 // And again since animations also queued in callbacks
2639 if (this.leafEdgeTmp) {
2640 $(this.leafEdgeTmp).stop(false, true);
2642 jQuery.each(this.prefetchedImgs, function() {
2643 $(this).stop(false, true);
2648 // keyboardNavigationIsDisabled(event)
2649 // - returns true if keyboard navigation should be disabled for the event
2650 //______________________________________________________________________________
2651 GnuBook.prototype.keyboardNavigationIsDisabled = function(event) {
2652 if (event.target.tagName == "INPUT") {
2658 // gutterOffsetForIndex
2659 //______________________________________________________________________________
2661 // Returns the gutter offset for the spread containing the given index.
2662 // This function supports RTL
2663 GnuBook.prototype.gutterOffsetForIndex = function(pindex) {
2665 // To find the offset of the gutter from the middle we calculate our percentage distance
2666 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
2667 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
2669 // But then again for RTL it's the opposite
2670 if ('rl' == this.pageProgression) {
2678 //______________________________________________________________________________
2679 // Returns the width of the leaf edge div for the page with index given
2680 GnuBook.prototype.leafEdgeWidth = function(pindex) {
2681 // $$$ could there be single pixel rounding errors for L vs R?
2682 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
2683 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
2685 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
2689 // jumpIndexForLeftEdgePageX
2690 //______________________________________________________________________________
2691 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
2692 GnuBook.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
2693 if ('rl' != this.pageProgression) {
2694 // LTR - flipping backward
2695 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
2697 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
2698 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
2702 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
2703 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
2708 // jumpIndexForRightEdgePageX
2709 //______________________________________________________________________________
2710 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
2711 GnuBook.prototype.jumpIndexForRightEdgePageX = function(pageX) {
2712 if ('rl' != this.pageProgression) {
2714 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
2715 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
2718 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
2719 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
2724 GnuBook.prototype.initToolbar = function(mode, ui) {
2726 $("#GnuBook").append("<div id='GBtoolbar'>"
2727 + "<span id='GBtoolbarbuttons' style='float: right'>"
2728 + "<button class='GBicon print rollover' /> <button class='GBicon rollover embed' />"
2729 + "<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>"
2730 + "<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>"
2731 + "<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>"
2732 + "<button class='GBicon rollover play' /><button class='GBicon rollover pause' style='display: none' />"
2736 + "<a class='GBicon logo rollover' href='" + this.logoURL + "'> </a>"
2737 + " <button class='GBicon rollover zoom_out' onclick='gb.zoom(-1); return false;'/>"
2738 + "<button class='GBicon rollover zoom_in' onclick='gb.zoom(1); return false;'/>"
2739 + " <span class='label'>Zoom: <span id='GBzoom'>"+parseInt(100/this.reduce)+"</span></span>"
2740 + " <button class='GBicon rollover one_page_mode' onclick='gb.switchMode(1); return false;'/>"
2741 + " <button class='GBicon rollover two_page_mode' onclick='gb.switchMode(2); return false;'/>"
2744 + "<span id='#GBbooktitle'>"
2745 + " <a class='GBblack title' href='"+this.bookUrl+"' target='_blank'>"+this.bookTitle+"</a>"
2749 this.updateToolbarZoom(this.reduce); // Pretty format
2751 if (ui == "embed") {
2752 $("#GnuBook a.logo").attr("target","_blank");
2755 // $$$ turn this into a member variable
2756 var jToolbar = $('#GBtoolbar'); // j prefix indicates jQuery object
2758 // We build in mode 2
2761 this.bindToolbarNavHandlers(jToolbar);
2763 // Setup tooltips -- later we could load these from a file for i18n
2764 var titles = { '.logo': 'Go to Archive.org',
2765 '.zoom_in': 'Zoom in',
2766 '.zoom_out': 'Zoom out',
2767 '.one_page_mode': 'One-page view',
2768 '.two_page_mode': 'Two-page view',
2769 '.print': 'Print this page',
2770 '.embed': 'Embed bookreader',
2771 '.book_left': 'Flip left',
2772 '.book_right': 'Flip right',
2773 '.book_up': 'Page up',
2774 '.book_down': 'Page down',
2777 '.book_top': 'First page',
2778 '.book_bottom': 'Last page'
2780 if ('rl' == this.pageProgression) {
2781 titles['.book_leftmost'] = 'Last page';
2782 titles['.book_rightmost'] = 'First page';
2784 titles['.book_leftmost'] = 'First page';
2785 titles['.book_rightmost'] = 'Last page';
2788 for (var icon in titles) {
2789 jToolbar.find(icon).attr('title', titles[icon]);
2792 // Hide mode buttons and autoplay if 2up is not available
2793 // $$$ if we end up with more than two modes we should show the applicable buttons
2794 if ( !this.canSwitchToMode(this.constMode2up) ) {
2795 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
2798 // Switch to requested mode -- binds other click handlers
2799 this.switchToolbarMode(mode);
2804 // switchToolbarMode
2805 //______________________________________________________________________________
2806 // Update the toolbar for the given mode (changes navigation buttons)
2807 // $$$ we should soon split the toolbar out into its own module
2808 GnuBook.prototype.switchToolbarMode = function(mode) {
2811 $('#GBtoolbar .GBtoolbarmode2').hide();
2812 $('#GBtoolbar .GBtoolbarmode1').show().css('display', 'inline');
2815 $('#GBtoolbar .GBtoolbarmode1').hide();
2816 $('#GBtoolbar .GBtoolbarmode2').show().css('display', 'inline');
2820 // bindToolbarNavHandlers
2821 //______________________________________________________________________________
2822 // Binds the toolbar handlers
2823 GnuBook.prototype.bindToolbarNavHandlers = function(jToolbar) {
2825 jToolbar.find('.book_left').bind('click', function(e) {
2830 jToolbar.find('.book_right').bind('click', function(e) {
2835 jToolbar.find('.book_up').bind('click', function(e) {
2840 jToolbar.find('.book_down').bind('click', function(e) {
2845 jToolbar.find('.print').bind('click', function(e) {
2850 jToolbar.find('.embed').bind('click', function(e) {
2855 jToolbar.find('.play').bind('click', function(e) {
2860 jToolbar.find('.pause').bind('click', function(e) {
2865 jToolbar.find('.book_top').bind('click', function(e) {
2870 jToolbar.find('.book_bottom').bind('click', function(e) {
2875 jToolbar.find('.book_leftmost').bind('click', function(e) {
2880 jToolbar.find('.book_rightmost').bind('click', function(e) {
2886 // updateToolbarZoom(reduce)
2887 //______________________________________________________________________________
2888 // Update the displayed zoom factor based on reduction factor
2889 GnuBook.prototype.updateToolbarZoom = function(reduce) {
2891 if (this.constMode2up == this.mode && this.twoPage.autofit) {
2894 value = (100 / reduce).toFixed(2);
2895 // Strip trailing zeroes and decimal if all zeroes
2896 value = value.replace(/0+$/,'');
2897 value = value.replace(/\.$/,'');
2900 $('#GBzoom').text(value);
2903 // firstDisplayableIndex
2904 //______________________________________________________________________________
2905 // Returns the index of the first visible page, dependent on the mode.
2906 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
2907 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
2908 GnuBook.prototype.firstDisplayableIndex = function() {
2909 if (this.mode == 0) {
2912 return 1; // $$$ we assume there are enough pages... we need logic for very short books
2916 // lastDisplayableIndex
2917 //______________________________________________________________________________
2918 // Returns the index of the last visible page, dependent on the mode.
2919 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
2920 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
2921 GnuBook.prototype.lastDisplayableIndex = function() {
2922 if (this.mode == 2) {
2923 if (this.lastDisplayableIndex2up === null) {
2924 // Calculate and cache
2925 var candidate = this.numLeafs - 1;
2926 for ( ; candidate >= 0; candidate--) {
2927 var spreadIndices = this.getSpreadIndices(candidate);
2928 if (Math.max(spreadIndices[0], spreadIndices[1]) < (this.numLeafs - 1)) {
2932 this.lastDisplayableIndex2up = candidate;
2934 return this.lastDisplayableIndex2up;
2936 return this.numLeafs - 1;
2940 // shortTitle(maximumCharacters)
2942 // Returns a shortened version of the title with the maximum number of characters
2943 GnuBook.prototype.shortTitle = function(maximumCharacters) {
2944 if (this.bookTitle.length < maximumCharacters) {
2945 return this.bookTitle;
2948 var title = this.bookTitle.substr(0, maximumCharacters - 3);
2953 // Parameter related functions
2955 // updateFromParams(params)
2957 // Update ourselves from the params object.
2959 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
2960 GnuBook.prototype.updateFromParams = function(params) {
2961 if ('undefined' != typeof(params.mode)) {
2962 this.switchMode(params.mode);
2966 if ('undefined' != typeof(params.searchTerm)) {
2967 this.search(params.searchTerm);
2970 // $$$ process /zoom
2972 // We only respect page if index is not set
2973 if ('undefined' != typeof(params.index)) {
2974 if (params.index != this.currentIndex()) {
2975 this.jumpToIndex(params.index);
2977 } else if ('undefined' != typeof(params.page)) {
2978 // $$$ this assumes page numbers are unique
2979 if (params.page != this.getPageNum(this.currentIndex())) {
2980 this.jumpToPage(params.page);
2984 // $$$ process /region
2985 // $$$ process /highlight
2988 // paramsFromFragment(urlFragment)
2990 // Returns a object with configuration parametes from a URL fragment.
2992 // E.g paramsFromFragment(window.location.hash)
2993 GnuBook.prototype.paramsFromFragment = function(urlFragment) {
2994 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
2998 // For convenience we allow an initial # character (as from window.location.hash)
2999 // but don't require it
3000 if (urlFragment.substr(0,1) == '#') {
3001 urlFragment = urlFragment.substr(1);
3004 // Simple #nn syntax
3005 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
3006 if ( !isNaN(oldStyleLeafNum) ) {
3007 params.index = oldStyleLeafNum;
3009 // Done processing if using old-style syntax
3013 // Split into key-value pairs
3014 var urlArray = urlFragment.split('/');
3016 for (var i = 0; i < urlArray.length; i += 2) {
3017 urlHash[urlArray[i]] = urlArray[i+1];
3021 if ('1up' == urlHash['mode']) {
3022 params.mode = this.constMode1up;
3023 } else if ('2up' == urlHash['mode']) {
3024 params.mode = this.constMode2up;
3028 if ('undefined' != typeof(urlHash['page'])) {
3029 // page was set -- may not be int
3030 params.page = urlHash['page'];
3033 // $$$ process /region
3034 // $$$ process /search
3036 if (urlHash['search'] != undefined) {
3037 params.searchTerm = GnuBook.util.decodeURIComponentPlus(urlHash['search']);
3040 // $$$ process /highlight
3045 // paramsFromCurrent()
3047 // Create a params object from the current parameters.
3048 GnuBook.prototype.paramsFromCurrent = function() {
3052 var pageNum = this.getPageNum(this.currentIndex());
3053 if ((pageNum === 0) || pageNum) {
3054 params.page = pageNum;
3057 params.index = this.currentIndex();
3058 params.mode = this.mode;
3064 if (this.searchHighlightVisible()) {
3065 params.searchTerm = this.searchTerm;
3071 // fragmentFromParams(params)
3073 // Create a fragment string from the params object.
3074 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
3075 GnuBook.prototype.fragmentFromParams = function(params) {
3076 var separator = '/';
3080 if ('undefined' != typeof(params.page)) {
3081 fragments.push('page', params.page);
3083 // Don't have page numbering -- use index instead
3084 fragments.push('page', 'n' + params.index);
3091 if ('undefined' != typeof(params.mode)) {
3092 if (params.mode == this.constMode1up) {
3093 fragments.push('mode', '1up');
3094 } else if (params.mode == this.constMode2up) {
3095 fragments.push('mode', '2up');
3097 throw 'fragmentFromParams called with unknown mode ' + params.mode;
3102 if (params.searchTerm) {
3103 fragments.push('search', params.searchTerm);
3106 return GnuBook.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
3109 // getPageIndex(pageNum)
3111 // Returns the *highest* index the given page number, or undefined
3112 GnuBook.prototype.getPageIndex = function(pageNum) {
3113 var pageIndices = this.getPageIndices(pageNum);
3115 if (pageIndices.length > 0) {
3116 return pageIndices[pageIndices.length - 1];
3122 // getPageIndices(pageNum)
3124 // Returns an array (possibly empty) of the indices with the given page number
3125 GnuBook.prototype.getPageIndices = function(pageNum) {
3128 // Check for special "nXX" page number
3129 if (pageNum.slice(0,1) == 'n') {
3131 var pageIntStr = pageNum.slice(1, pageNum.length);
3132 var pageIndex = parseInt(pageIntStr);
3133 indices.push(pageIndex);
3136 // Do nothing... will run through page names and see if one matches
3141 for (i=0; i<this.numLeafs; i++) {
3142 if (this.getPageNum(i) == pageNum) {
3150 // getPageName(index)
3152 // Returns the name of the page as it should be displayed in the user interface
3153 GnuBook.prototype.getPageName = function(index) {
3154 return 'Page ' + this.getPageNum(index);
3157 // updateLocationHash
3159 // Update the location hash from the current parameters. Call this instead of manually
3160 // using window.location.replace
3161 GnuBook.prototype.updateLocationHash = function() {
3162 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
3163 window.location.replace(newHash);
3165 // This is the variable checked in the timer. Only user-generated changes
3166 // to the URL will trigger the event.
3167 this.oldLocationHash = newHash;
3170 // startLocationPolling
3172 // Starts polling of window.location to see hash fragment changes
3173 GnuBook.prototype.startLocationPolling = function() {
3174 var self = this; // remember who I am
3175 self.oldLocationHash = window.location.hash;
3177 if (this.locationPollId) {
3178 clearInterval(this.locationPollID);
3179 this.locationPollId = null;
3182 this.locationPollId = setInterval(function() {
3183 var newHash = window.location.hash;
3184 if (newHash != self.oldLocationHash) {
3185 if (newHash != self.oldUserHash) { // Only process new user hash once
3186 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
3188 // Queue change if animating
3189 if (self.animating) {
3191 self.animationFinishedCallback = function() {
3192 self.updateFromParams(self.paramsFromFragment(newHash));
3194 } else { // update immediately
3195 self.updateFromParams(self.paramsFromFragment(newHash));
3197 self.oldUserHash = newHash;
3205 // Returns true if we can switch to the requested mode
3206 GnuBook.prototype.canSwitchToMode = function(mode) {
3207 if (mode == this.constMode2up) {
3208 // check there are enough pages to display
3209 // $$$ this is a workaround for the mis-feature that we can't display
3210 // short books in 2up mode
3211 if (this.numLeafs < 6) {
3219 // searchHighlightVisible
3221 // Returns true if a search highlight is currently being displayed
3222 GnuBook.prototype.searchHighlightVisible = function() {
3223 if (this.constMode2up == this.mode) {
3224 if (this.searchResults[this.twoPage.currentIndexL]
3225 || this.searchResults[this.twoPage.currentIndexR]) {
3229 if (this.searchResults[this.currentIndex()]) {
3236 // Library functions
3238 clamp: function(value, min, max) {
3239 return Math.min(Math.max(value, min), max);
3242 getIFrameDocument: function(iframe) {
3243 // Adapted from http://xkr.us/articles/dom/iframe-document/
3244 var outer = (iframe.contentWindow || iframe.contentDocument);
3245 return (outer.document || outer);
3248 decodeURIComponentPlus: function(value) {
3249 // Decodes a URI component and converts '+' to ' '
3250 return decodeURIComponent(value).replace(/\+/g, ' ');
3253 encodeURIComponentPlus: function(value) {
3254 // Encodes a URI component and converts ' ' to '+'
3255 return encodeURIComponent(value).replace(/%20/g, '+');