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().
34 if (typeof(console) == 'undefined') {
35 console = { log: function(msg) { } };
41 this.mode = 1; //1 or 2
42 this.ui = 'full'; // UI mode
44 this.displayedIndices = [];
45 //this.indicesToDisplay = [];
47 this.prefetchedImgs = {}; //an object with numeric keys cooresponding to page index
50 this.animating = false;
52 this.autoTimer = null;
53 this.flipSpeed = 'fast';
55 this.twoPagePopUp = null;
56 this.leafEdgeTmp = null;
57 this.embedPopup = null;
59 this.searchResults = {};
61 this.firstIndex = null;
63 this.lastDisplayableIndex2up = null;
65 // We link to index.php to avoid redirect which breaks back button
66 this.logoURL = 'http://www.archive.org/index.php';
68 // Base URL for images
69 this.imagesBaseURL = '/bookreader/images/';
72 this.constMode1up = 1;
73 this.constMode2up = 2;
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');
145 e.data.prepareTwoPageView();
149 $('.GBpagediv1up').bind('mousedown', this, function(e) {
150 //console.log('mousedown!');
153 if (1 == this.mode) {
154 this.resizePageView();
155 this.firstIndex = startIndex;
156 this.jumpToIndex(startIndex);
158 //this.resizePageView();
160 this.displayedIndices=[0];
161 this.firstIndex = startIndex;
162 this.displayedIndices = [this.firstIndex];
163 //console.log('titleLeaf: %d', this.titleLeaf);
164 //console.log('displayedIndices: %s', this.displayedIndices);
165 this.prepareTwoPageView();
166 //if (this.auto) this.nextPage();
169 // Enact other parts of initial params
170 this.updateFromParams(params);
173 GnuBook.prototype.setupKeyListeners = function() {
186 // We use document here instead of window to avoid a bug in jQuery on IE7
187 $(document).keydown(function(e) {
189 // Keyboard navigation
193 // In 1up mode page scrolling is handled by browser
194 if (2 == self.mode) {
200 if (2 == self.mode) {
211 if (self.keyboardNavigationIsDisabled(e)) {
214 if (2 == self.mode) {
219 if (self.keyboardNavigationIsDisabled(e)) {
222 if (2 == self.mode) {
231 //______________________________________________________________________________
232 GnuBook.prototype.drawLeafs = function() {
233 if (1 == this.mode) {
234 this.drawLeafsOnePage();
236 this.drawLeafsTwoPage();
240 // setDragHandler1up()
241 //______________________________________________________________________________
242 GnuBook.prototype.setDragHandler1up = function(div) {
243 div.dragging = false;
245 $(div).bind('mousedown', function(e) {
246 //console.log('mousedown at ' + e.pageY);
248 this.dragging = true;
249 this.prevMouseX = e.pageX;
250 this.prevMouseY = e.pageY;
252 var startX = e.pageX;
253 var startY = e.pageY;
254 var startTop = $('#GBcontainer').attr('scrollTop');
255 var startLeft = $('#GBcontainer').attr('scrollLeft');
260 $(div).bind('mousemove', function(ee) {
261 //console.log('mousemove ' + startY);
263 var offsetX = ee.pageX - this.prevMouseX;
264 var offsetY = ee.pageY - this.prevMouseY;
267 $('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
268 $('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
271 this.prevMouseX = ee.pageX;
272 this.prevMouseY = ee.pageY;
277 $(div).bind('mouseup', function(ee) {
278 //console.log('mouseup');
280 this.dragging = false;
284 $(div).bind('mouseleave', function(e) {
285 //console.log('mouseleave');
287 //$(this).unbind('mousemove mouseup');
288 this.dragging = false;
293 // drawLeafsOnePage()
294 //______________________________________________________________________________
295 GnuBook.prototype.drawLeafsOnePage = function() {
296 //alert('drawing leafs!');
300 var scrollTop = $('#GBcontainer').attr('scrollTop');
301 var scrollBottom = scrollTop + $('#GBcontainer').height();
302 //console.log('top=' + scrollTop + ' bottom='+scrollBottom);
304 var indicesToDisplay = [];
309 for (i=0; i<this.numLeafs; i++) {
310 var height = parseInt(this.getPageHeight(i)/this.reduce);
312 leafBottom += height;
313 //console.log('leafTop = '+leafTop+ ' pageH = ' + this.pageH[i] + 'leafTop>=scrollTop=' + (leafTop>=scrollTop));
314 var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
315 var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
316 var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
317 if (topInView | bottomInView | middleInView) {
318 //console.log('displayed: ' + this.displayedIndices);
319 //console.log('to display: ' + i);
320 indicesToDisplay.push(i);
322 leafTop += height +10;
326 var firstIndexToDraw = indicesToDisplay[0];
327 this.firstIndex = firstIndexToDraw;
329 // Update hash, but only if we're currently displaying a leaf
330 // Hack that fixes #365790
331 if (this.displayedIndices.length > 0) {
332 this.updateLocationHash();
335 if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
337 indicesToDisplay.unshift(firstIndexToDraw);
340 var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
341 if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
342 indicesToDisplay.push(lastIndexToDraw+1);
347 for (i=0; i<firstIndexToDraw; i++) {
348 leafTop += parseInt(this.getPageHeight(i)/this.reduce) +10;
351 //var viewWidth = $('#GBpageview').width(); //includes scroll bar width
352 var viewWidth = $('#GBcontainer').attr('scrollWidth');
355 for (i=0; i<indicesToDisplay.length; i++) {
356 var index = indicesToDisplay[i];
357 var height = parseInt(this.getPageHeight(index)/this.reduce);
359 if(-1 == jQuery.inArray(indicesToDisplay[i], this.displayedIndices)) {
360 var width = parseInt(this.getPageWidth(index)/this.reduce);
361 //console.log("displaying leaf " + indicesToDisplay[i] + ' leafTop=' +leafTop);
362 var div = document.createElement("div");
363 div.className = 'GBpagediv1up';
364 div.id = 'pagediv'+index;
365 div.style.position = "absolute";
366 $(div).css('top', leafTop + 'px');
367 var left = (viewWidth-width)>>1;
368 if (left<0) left = 0;
369 $(div).css('left', left+'px');
370 $(div).css('width', width+'px');
371 $(div).css('height', height+'px');
372 //$(div).text('loading...');
374 this.setDragHandler1up(div);
376 $('#GBpageview').append(div);
378 var img = document.createElement("img");
379 img.src = this.getPageURI(index);
380 $(img).css('width', width+'px');
381 $(img).css('height', height+'px');
385 //console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
388 leafTop += height +10;
392 for (i=0; i<this.displayedIndices.length; i++) {
393 if (-1 == jQuery.inArray(this.displayedIndices[i], indicesToDisplay)) {
394 var index = this.displayedIndices[i];
395 //console.log('Removing leaf ' + index);
396 //console.log('id='+'#pagediv'+index+ ' top = ' +$('#pagediv'+index).css('top'));
397 $('#pagediv'+index).remove();
399 //console.log('NOT Removing leaf ' + this.displayedIndices[i]);
403 this.displayedIndices = indicesToDisplay.slice();
404 this.updateSearchHilites();
406 if (null != this.getPageNum(firstIndexToDraw)) {
407 $("#GBpagenum").val(this.getPageNum(this.currentIndex()));
409 $("#GBpagenum").val('');
412 this.updateToolbarZoom(this.reduce);
416 // drawLeafsTwoPage()
417 //______________________________________________________________________________
418 GnuBook.prototype.drawLeafsTwoPage = function() {
419 console.log('drawing two leafs!'); // XXX
421 var scrollTop = $('#GBtwopageview').attr('scrollTop');
422 var scrollBottom = scrollTop + $('#GBtwopageview').height();
424 console.log('drawLeafsTwoPage: this.currrentLeafL ' + this.twoPage.currentIndexL); // XXX
426 var indexL = this.twoPage.currentIndexL;
427 var heightL = this.getPageHeight(indexL);
428 var widthL = this.getPageWidth(indexL);
430 var leafEdgeWidthL = this.leafEdgeWidth(indexL);
431 var leafEdgeWidthR = this.twoPage.edgeWidth - leafEdgeWidthL;
432 //var bookCoverDivWidth = this.twoPage.width*2 + 20 + this.twoPage.edgeWidth; // $$$ hardcoded cover width
433 var bookCoverDivWidth = this.twoPage.bookCoverDivWidth;
434 //console.log(leafEdgeWidthL);
436 var middle = this.twoPage.middle; // $$$ getter instead?
437 var top = this.twoPageTop();
438 var bookCoverDivLeft = this.twoPage.bookCoverDivLeft;
440 // $$$ should get getwidth2up?
441 //var scaledWL = parseInt(this.twoPage.height*widthL/heightL);
442 var scaledWL = this.getPageWidth2UP(indexL);
443 var gutter = this.twoPageGutter();
445 this.prefetchImg(indexL);
446 $(this.prefetchedImgs[indexL]).css({
447 position: 'absolute',
448 left: gutter-scaledWL+'px',
451 backgroundColor: 'rgb(234, 226, 205)',
452 height: this.twoPage.height +'px', // $$$ height forced the same for both pages
453 width: scaledWL + 'px',
454 borderRight: '1px solid black',
456 }).appendTo('#GBtwopageview');
459 var indexR = this.twoPage.currentIndexR;
460 var heightR = this.getPageHeight(indexR);
461 var widthR = this.getPageWidth(indexR);
463 // $$$ should use getwidth2up?
464 //var scaledWR = this.twoPage.height*widthR/heightR;
465 var scaledWR = this.getPageWidth2UP(indexR);
466 this.prefetchImg(indexR);
467 $(this.prefetchedImgs[indexR]).css({
468 position: 'absolute',
472 backgroundColor: 'rgb(234, 226, 205)',
473 height: this.twoPage.height + 'px', // $$$ height forced the same for both pages
474 width: scaledWR + 'px',
475 borderLeft: '1px solid black',
477 }).appendTo('#GBtwopageview');
480 this.displayedIndices = [this.twoPage.currentIndexL, this.twoPage.currentIndexR];
481 this.setClickHandlers();
483 this.updatePageNumBox2UP();
484 this.updateToolbarZoom(this.reduce);
487 // updatePageNumBox2UP
488 //______________________________________________________________________________
489 GnuBook.prototype.updatePageNumBox2UP = function() {
490 if (null != this.getPageNum(this.twoPage.currentIndexL)) {
491 $("#GBpagenum").val(this.getPageNum(this.twoPage.currentIndexL));
493 $("#GBpagenum").val('');
495 this.updateLocationHash();
499 //______________________________________________________________________________
500 GnuBook.prototype.loadLeafs = function() {
504 if (null == this.timer) {
505 this.timer=setTimeout(function(){self.drawLeafs()},250);
507 clearTimeout(this.timer);
508 this.timer=setTimeout(function(){self.drawLeafs()},250);
514 // Pass 1 to zoom in, anything else to zoom out
515 //______________________________________________________________________________
516 GnuBook.prototype.zoom = function(direction) {
518 case this.constMode1up:
519 return this.zoom1up(direction);
520 case this.constMode2up:
521 return this.zoom2up(direction);
526 //______________________________________________________________________________
527 GnuBook.prototype.zoom1up = function(dir) {
528 if (2 == this.mode) { //can only zoom in 1-page mode
533 // $$$ with flexible zoom we could "snap" to /2 page reductions
534 // for better scaling
536 if (this.reduce <= 0.5) return;
537 this.reduce*=0.5; //zoom in
539 if (this.reduce >= 8) return;
540 this.reduce*=2; //zoom out
543 this.resizePageView();
545 $('#GBpageview').empty()
546 this.displayedIndices = [];
549 this.updateToolbarZoom(this.reduce);
553 //______________________________________________________________________________
554 GnuBook.prototype.resizePageView = function() {
557 //var viewWidth = $('#GBcontainer').width(); //includes scrollBar
558 var viewWidth = $('#GBcontainer').attr('clientWidth');
560 var oldScrollTop = $('#GBcontainer').attr('scrollTop');
561 var oldScrollLeft = $('#GBcontainer').attr('scrollLeft');
562 var oldPageViewHeight = $('#GBpageview').height();
563 var oldPageViewWidth = $('#GBpageview').width();
565 var oldCenterY = this.centerY1up();
566 var oldCenterX = this.centerX1up();
568 if (0 != oldPageViewHeight) {
569 var scrollRatio = oldCenterY / oldPageViewHeight;
574 for (i=0; i<this.numLeafs; i++) {
575 viewHeight += parseInt(this.getPageHeight(i)/this.reduce) + this.padding;
576 var width = parseInt(this.getPageWidth(i)/this.reduce);
577 if (width>viewWidth) viewWidth=width;
579 $('#GBpageview').height(viewHeight);
580 $('#GBpageview').width(viewWidth);
582 var newCenterY = scrollRatio*viewHeight;
583 var newTop = Math.max(0, Math.floor( newCenterY - $('#GBcontainer').height()/2 ));
584 $('#GBcontainer').attr('scrollTop', newTop);
586 // We use clientWidth here to avoid miscalculating due to scroll bar
587 var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
588 var newLeft = newCenterX - $('#GBcontainer').attr('clientWidth') / 2;
589 newLeft = Math.max(newLeft, 0);
590 $('#GBcontainer').attr('scrollLeft', newLeft);
591 //console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
593 //this.centerPageView();
599 //______________________________________________________________________________
600 // Returns the current offset of the viewport center in scaled document coordinates.
601 GnuBook.prototype.centerX1up = function() {
603 if ($('#GBpageview').width() < $('#GBcontainer').attr('clientWidth')) { // fully shown
604 centerX = $('#GBpageview').width();
606 centerX = $('#GBcontainer').attr('scrollLeft') + $('#GBcontainer').attr('clientWidth') / 2;
608 centerX = Math.floor(centerX);
613 //______________________________________________________________________________
614 // Returns the current offset of the viewport center in scaled document coordinates.
615 GnuBook.prototype.centerY1up = function() {
616 var centerY = $('#GBcontainer').attr('scrollTop') + $('#GBcontainer').height() / 2;
617 return Math.floor(centerY);
621 //______________________________________________________________________________
622 GnuBook.prototype.centerPageView = function() {
624 var scrollWidth = $('#GBcontainer').attr('scrollWidth');
625 var clientWidth = $('#GBcontainer').attr('clientWidth');
626 //console.log('sW='+scrollWidth+' cW='+clientWidth);
627 if (scrollWidth > clientWidth) {
628 $('#GBcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
633 // zoom2up(direction)
634 //______________________________________________________________________________
635 GnuBook.prototype.zoom2up = function(direction) {
636 // $$$ this is where we can e.g. snap to %2 sizes
637 if (0 == direction) { // autofit mode
638 this.twoPage.autofit = true;;
639 } else if (1 == direction) {
640 if (this.reduce <= 0.5) return;
641 this.reduce*=0.5; //zoom in
642 this.twoPage.autofit = false;
644 if (this.reduce >= 8) return;
645 this.reduce *= 2; // zoom out
646 this.twoPage.autofit = false;
649 this.prepareTwoPageView();
653 //______________________________________________________________________________
654 // Attempts to jump to page. Returns true if page could be found, false otherwise.
655 GnuBook.prototype.jumpToPage = function(pageNum) {
657 var pageIndex = this.getPageIndex(pageNum);
659 if ('undefined' != typeof(pageIndex)) {
662 this.jumpToIndex(pageIndex);
663 $('#GBcontainer').attr('scrollTop', leafTop);
672 //______________________________________________________________________________
673 GnuBook.prototype.jumpToIndex = function(index) {
675 if (2 == this.mode) {
678 // By checking against min/max we do nothing if requested index
680 if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
681 this.flipBackToIndex(index);
682 } else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
683 this.flipFwdToIndex(index);
690 for (i=0; i<index; i++) {
691 h = parseInt(this.getPageHeight(i)/this.reduce);
692 leafTop += h + this.padding;
694 //$('#GBcontainer').attr('scrollTop', leafTop);
695 $('#GBcontainer').animate({scrollTop: leafTop },'fast');
702 //______________________________________________________________________________
703 GnuBook.prototype.switchMode = function(mode) {
705 //console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
707 if (mode == this.mode) return;
709 if (!this.canSwitchToMode(mode)) {
714 this.removeSearchHilites();
718 this.switchToolbarMode(mode);
721 this.prepareOnePageView();
723 this.prepareTwoPageView();
728 //prepareOnePageView()
729 //______________________________________________________________________________
730 GnuBook.prototype.prepareOnePageView = function() {
732 // var startLeaf = this.displayedIndices[0];
733 var startLeaf = this.currentIndex();
735 $('#GBcontainer').empty();
736 $('#GBcontainer').css({
741 var gbPageView = $("#GBcontainer").append("<div id='GBpageview'></div>");
743 this.resizePageView();
745 this.jumpToIndex(startLeaf);
746 this.displayedIndices = [];
748 this.drawLeafsOnePage();
750 // Bind mouse handlers
751 // Disable mouse click to avoid selected/highlighted page images - bug 354239
752 gbPageView.bind('mousedown', function(e) {
755 // Special hack for IE7
756 gbPageView[0].onselectstart = function(e) { return false; };
759 // prepareTwoPageView()
760 //______________________________________________________________________________
761 // Some decisions about two page view:
763 // Both pages will be displayed at the same height, even if they were different physical/scanned
764 // sizes. This simplifies the animation (from a design as well as technical standpoint). We
765 // examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
766 // aspect ratio to determine the height.
768 // The two page view div is resized to keep the middle of the book in the middle of the div
769 // even as the page sizes change. To e.g. keep the middle of the book in the middle of the GBcontent
770 // div requires adjusting the offset of GBtwpageview and/or scrolling in GBcontent.
771 GnuBook.prototype.prepareTwoPageView = function() {
772 $('#GBcontainer').empty();
773 $('#GBcontainer').css('overflow', 'auto');
775 // Add the two page view
776 $('#GBcontainer').append('<div id="GBtwopageview"></div>');
777 // Explicitly set sizes the same
778 // $$$ calculate first then set
779 $('#GBtwopageview').css( {
780 height: $('#GBcontainer').height(),
781 width: $('#GBcontainer').width(),
785 // We want to display two facing pages. We may be missing
786 // one side of the spread because it is the first/last leaf,
787 // foldouts, missing pages, etc
789 //var targetLeaf = this.displayedIndices[0];
790 var targetLeaf = this.firstIndex;
792 if (targetLeaf < this.firstDisplayableIndex()) {
793 targetLeaf = this.firstDisplayableIndex();
796 if (targetLeaf > this.lastDisplayableIndex()) {
797 targetLeaf = this.lastDisplayableIndex();
800 this.twoPage.currentIndexL = null;
801 this.twoPage.currentIndexR = null;
802 this.pruneUnusedImgs();
804 var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
805 this.twoPage.currentIndexL = currentSpreadIndices[0];
806 this.twoPage.currentIndexR = currentSpreadIndices[1];
807 this.firstIndex = this.twoPage.currentIndexL;
809 this.calculateSpreadSize(); //sets twoPage.width, twoPage.height, and twoPage.ratio
811 console.dir(this.twoPage); // XXX
813 $('#GBtwopageview').width(this.twoPage.totalWidth).height(this.twoPage.totalHeight);
815 this.twoPageDiv = document.createElement('div');
816 $(this.twoPageDiv).attr('id', 'GBbookcover').css({
817 border: '1px solid rgb(68, 25, 17)',
818 width: this.twoPage.bookCoverDivWidth + 'px',
819 height: this.twoPage.bookCoverDivHeight+'px',
820 visibility: 'visible',
821 position: 'absolute',
822 backgroundColor: '#663929',
823 left: this.twoPage.bookCoverDivLeft + 'px',
824 top: this.twoPage.bookCoverDivTop+'px',
825 MozBorderRadiusTopleft: '7px',
826 MozBorderRadiusTopright: '7px',
827 MozBorderRadiusBottomright: '7px',
828 MozBorderRadiusBottomleft: '7px'
829 }).appendTo('#GBtwopageview');
831 this.leafEdgeR = document.createElement('div');
832 this.leafEdgeR.className = 'leafEdgeR'; // $$$ the static CSS should be moved into the .css file
833 $(this.leafEdgeR).css({
834 borderStyle: 'solid solid solid none',
835 borderColor: 'rgb(51, 51, 34)',
836 borderWidth: '1px 1px 1px 0px',
837 background: 'transparent url(' + this.imagesBaseURL + 'right_edges.png) repeat scroll 0% 0%',
838 width: this.twoPage.leafEdgeWidthR + 'px',
839 height: this.twoPage.height-1 + 'px',
841 left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
842 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
844 }).appendTo('#GBtwopageview');
846 this.leafEdgeL = document.createElement('div');
847 this.leafEdgeL.className = 'leafEdgeL';
848 $(this.leafEdgeL).css({ // $$$ static CSS should be moved to file
849 borderStyle: 'solid none solid solid',
850 borderColor: 'rgb(51, 51, 34)',
851 borderWidth: '1px 0px 1px 1px',
852 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
853 width: this.twoPage.leafEdgeWidthL + 'px',
854 height: this.twoPage.height-1 + 'px',
855 left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
856 top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
858 }).appendTo('#GBtwopageview');
860 div = document.createElement('div');
861 $(div).attr('id', 'GBbookspine').css({
862 border: '1px solid rgb(68, 25, 17)',
863 width: this.twoPage.bookSpineDivWidth+'px',
864 height: this.twoPage.bookSpineDivHeight+'px',
865 position: 'absolute',
866 backgroundColor: 'rgb(68, 25, 17)',
867 left: this.twoPage.bookSpineDivLeft+'px',
868 top: this.twoPage.bookSpineDivTop+'px'
869 }).appendTo('#GBtwopageview');
871 this.prepareTwoPagePopUp();
873 this.displayedIndices = [];
875 //this.indicesToDisplay=[firstLeaf, firstLeaf+1];
876 //console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
878 this.drawLeafsTwoPage();
879 this.updateSearchHilites2UP();
880 this.updateToolbarZoom(this.reduce);
885 // prepareTwoPagePopUp()
887 // This function prepares the "View Page n" popup that shows while the mouse is
888 // over the left/right "stack of sheets" edges. It also binds the mouse
889 // events for these divs.
890 //______________________________________________________________________________
891 GnuBook.prototype.prepareTwoPagePopUp = function() {
893 this.twoPagePopUp = document.createElement('div');
894 $(this.twoPagePopUp).css({
895 border: '1px solid black',
897 position: 'absolute',
898 fontFamily: 'sans-serif',
901 backgroundColor: 'rgb(255, 255, 238)',
903 }).appendTo('#GBcontainer');
904 $(this.twoPagePopUp).hide();
906 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
907 $(e.data.twoPagePopUp).show();
910 $(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
911 $(e.data.twoPagePopUp).hide();
914 $(this.leafEdgeL).bind('click', this, function(e) {
916 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
917 e.data.jumpToIndex(jumpIndex);
920 $(this.leafEdgeR).bind('click', this, function(e) {
922 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
923 e.data.jumpToIndex(jumpIndex);
926 $(this.leafEdgeR).bind('mousemove', this, function(e) {
928 var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
929 $(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
931 // $$$ TODO: Make sure popup is positioned so that it is in view
932 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
933 $(e.data.twoPagePopUp).css({
934 left: e.pageX- $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() + 20 + 'px',
935 top: e.pageY - $('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
939 $(this.leafEdgeL).bind('mousemove', this, function(e) {
941 var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
942 $(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
944 // $$$ TODO: Make sure popup is positioned so that it is in view
945 // (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
946 $(e.data.twoPagePopUp).css({
947 left: e.pageX - $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
948 top: e.pageY-$('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
953 // calculateSpreadSize()
954 //______________________________________________________________________________
955 // Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
956 // this.twoPage.currentIndexR
957 // This function sets this.twoPage.height, twoPage.width, and twoPage.ratio
959 GnuBook.prototype.calculateSpreadSize = function() {
960 console.log('calculateSpreadSize ' + this.twoPage.currentIndexL); // XXX
962 // $$$ TODO Calculate the spread size based on the reduction factor. If we are using
963 // fit mode we recalculate the reduction factor based on the current page sizes
964 // and display size first.
966 var firstIndex = this.twoPage.currentIndexL;
967 var secondIndex = this.twoPage.currentIndexR;
968 //console.log('first page is ' + firstIndex);
971 if ( this.twoPage.autofit) {
972 spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
974 // set based on reduction factor
975 spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
978 this.twoPage.height = spreadSize.height;
979 this.twoPage.width = spreadSize.width;
980 this.twoPage.ratio = spreadSize.ratio;
981 this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
983 this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
984 this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
985 this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
986 this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
988 // The width of the book cover div. The combined width of both pages, twice the width
989 // of the book cover internal padding (2*10) and the page edges
990 this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
992 // The height of the book cover div
993 this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
995 // Total height and width -- makes the spine middle centered
996 var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
997 var largestWidthFromCenter = Math.max( (this.twoPage.scaledWL + leftGutterOffset), (this.twoPage.scaledWR - leftGutterOffset));
998 this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
999 this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
1001 // We want to minimize the unused space in two-up mode (maximize the amount of page
1002 // shown). We give width to the leaf edges and these widths change (though the sum
1003 // of the two remains constant) as we flip through the book. With the book
1004 // cover centered and fixed in the GBcontainer div the page images will meet
1005 // at the "gutter" which is generally offset from the center.
1006 this.twoPage.middle = this.twoPage.totalWidth >> 1;
1007 this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
1009 this.twoPage.bookCoverDivLeft = this.twoPage.middle - this.twoPage.scaledWL - this.twoPage.coverInternalPadding; // $$$ Account for border?
1010 this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding; // $$$ Account for border?
1012 this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
1013 this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
1014 this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
1017 this.reduce = spreadSize.reduce; // $$$ really set this here?
1020 GnuBook.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
1023 // We check which page is closest to a "normal" page and use that to set the height
1024 // for both pages. This means that foldouts and other odd size pages will be displayed
1025 // smaller than the nominal zoom amount.
1026 var canon5Dratio = 1.5;
1029 height: this.getPageHeight(firstIndex),
1030 width: this.getPageWidth(firstIndex)
1034 height: this.getPageHeight(secondIndex),
1035 width: this.getPageWidth(secondIndex)
1038 var firstIndexRatio = first.height / first.width;
1039 var secondIndexRatio = second.height / second.width;
1040 //console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
1042 if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
1043 ideal.ratio = firstIndexRatio;
1044 //console.log('using firstIndexRatio ' + ratio);
1046 ideal.ratio = secondIndexRatio;
1047 //console.log('using secondIndexRatio ' + ratio);
1050 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1051 var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1);
1052 ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1054 ideal.width = ($('#GBcontainer').attr('clientWidth') - 30 - ideal.totalLeafEdgeWidth)>>1;
1055 ideal.height = $('#GBcontainer').height() - 30; // $$$ why - 30? book edge width?
1056 //console.log('init idealWidth='+idealWidth+' idealHeight='+idealHeight + ' ratio='+ratio);
1058 if (ideal.height/ideal.ratio <= ideal.width) {
1060 ideal.width = parseInt(ideal.height/ideal.ratio);
1063 ideal.height = parseInt(ideal.width*ideal.ratio);
1066 // XXX check this logic with large spreads
1067 ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
1072 GnuBook.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
1073 var spreadSize = {};
1074 // $$$ Scale this based on reduce?
1075 var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
1076 var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1);
1077 spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
1079 // $$$ this isn't quite right when the pages are different sizes
1080 var nativeWidth = this.getPageWidth(firstIndex) + this.getPageWidth(secondIndex);
1081 var nativeHeight = this.getPageHeight(firstIndex) + this.getPageHeight(secondIndex);
1082 spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
1083 spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
1084 spreadSize.reduce = reduce;
1087 console.log('spread size: ' + firstIndex + ',' + secondIndex + ',' + reduce);
1093 //______________________________________________________________________________
1094 // Returns the currently active index.
1095 GnuBook.prototype.currentIndex = function() {
1096 // $$$ we should be cleaner with our idea of which index is active in 1up/2up
1097 if (this.mode == this.constMode1up || this.mode == this.constMode2up) {
1098 return this.firstIndex;
1100 throw 'currentIndex called for unimplemented mode ' + this.mode;
1105 //______________________________________________________________________________
1106 // Flip the right page over onto the left
1107 GnuBook.prototype.right = function() {
1108 if ('rl' != this.pageProgression) {
1118 //______________________________________________________________________________
1119 // Flip to the rightmost page
1120 GnuBook.prototype.rightmost = function() {
1121 if ('rl' != this.pageProgression) {
1129 //______________________________________________________________________________
1130 // Flip the left page over onto the right.
1131 GnuBook.prototype.left = function() {
1132 if ('rl' != this.pageProgression) {
1142 //______________________________________________________________________________
1143 // Flip to the leftmost page
1144 GnuBook.prototype.leftmost = function() {
1145 if ('rl' != this.pageProgression) {
1153 //______________________________________________________________________________
1154 GnuBook.prototype.next = function() {
1155 if (2 == this.mode) {
1157 this.flipFwdToIndex(null);
1159 if (this.firstIndex < this.lastDisplayableIndex()) {
1160 this.jumpToIndex(this.firstIndex+1);
1166 //______________________________________________________________________________
1167 GnuBook.prototype.prev = function() {
1168 if (2 == this.mode) {
1170 this.flipBackToIndex(null);
1172 if (this.firstIndex >= 1) {
1173 this.jumpToIndex(this.firstIndex-1);
1178 GnuBook.prototype.first = function() {
1179 if (2 == this.mode) {
1180 this.jumpToIndex(2);
1183 this.jumpToIndex(0);
1187 GnuBook.prototype.last = function() {
1188 if (2 == this.mode) {
1189 this.jumpToIndex(this.lastDisplayableIndex());
1192 this.jumpToIndex(this.lastDisplayableIndex());
1196 // flipBackToIndex()
1197 //______________________________________________________________________________
1198 // to flip back one spread, pass index=null
1199 GnuBook.prototype.flipBackToIndex = function(index) {
1200 if (1 == this.mode) return;
1202 var leftIndex = this.twoPage.currentIndexL;
1204 // $$$ Need to change this to be able to see first spread.
1205 // See https://bugs.launchpad.net/gnubook/+bug/296788
1206 if (leftIndex <= 2) return;
1207 if (this.animating) return;
1209 if (null != this.leafEdgeTmp) {
1210 alert('error: leafEdgeTmp should be null!');
1214 if (null == index) {
1215 index = leftIndex-2;
1217 //if (index<0) return;
1219 var previousIndices = this.getSpreadIndices(index);
1221 if (previousIndices[0] < 0 || previousIndices[1] < 0) {
1225 //console.log("flipping back to " + previousIndices[0] + ',' + previousIndices[1]);
1227 this.animating = true;
1229 if ('rl' != this.pageProgression) {
1230 // Assume LTR and we are going backward
1231 var gutter = this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
1232 this.flipLeftToRight(previousIndices[0], previousIndices[1], gutter);
1235 // RTL and going backward
1236 var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
1237 this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
1241 // flipLeftToRight()
1242 //______________________________________________________________________________
1243 // Flips the page on the left towards the page on the right
1244 GnuBook.prototype.flipLeftToRight = function(newIndexL, newIndexR, gutter) {
1246 var leftLeaf = this.twoPage.currentIndexL;
1248 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1249 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1250 var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
1252 var currWidthL = this.getPageWidth2UP(leftLeaf);
1253 var newWidthL = this.getPageWidth2UP(newIndexL);
1254 var newWidthR = this.getPageWidth2UP(newIndexR);
1256 var top = this.twoPageTop();
1257 var gutter = this.twoPageGutter();
1259 //console.log('leftEdgeTmpW ' + leafEdgeTmpW);
1260 //console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
1262 //animation strategy:
1263 // 0. remove search highlight, if any.
1264 // 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
1265 // of the left leaf and where the user clicked in the leaf edge.
1266 // Note that if this function was triggered by left() and not a
1267 // mouse click, the width of leafEdgeTmp is very small (zero px).
1268 // 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
1269 // leftLeaf to width=0.
1270 // 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
1271 // (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
1272 // its new full width.
1273 // 4. After step 3 is finished, do the following:
1274 // - remove leafEdgeTmp from the dom.
1275 // - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
1276 // and width=twoPage.edgeWidth-newLeafEdgeWidthL.
1277 // - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
1278 // and width=newLeafEdgeWidthL.
1279 // - resize the back cover (twoPageDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
1280 // and width=newWidthL+newWidthR+twoPage.edgeWidth+20
1281 // - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
1282 // - remove old left and right leafs from the dom [pruneUnusedImgs()].
1283 // - prefetch new adjacent leafs.
1284 // - set up click handlers for both new left and right leafs.
1285 // - redraw the search highlight.
1286 // - update the pagenum box and the url.
1289 var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
1291 this.leafEdgeTmp = document.createElement('div');
1292 $(this.leafEdgeTmp).css({
1293 borderStyle: 'solid none solid solid',
1294 borderColor: 'rgb(51, 51, 34)',
1295 borderWidth: '1px 0px 1px 1px',
1296 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1297 width: leafEdgeTmpW + 'px',
1298 height: this.twoPage.height-1 + 'px',
1299 left: leftEdgeTmpLeft + 'px',
1301 position: 'absolute',
1303 }).appendTo('#GBtwopageview');
1305 //$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
1306 $(this.leafEdgeL).css({
1307 width: newLeafEdgeWidthL+'px',
1308 left: gutter-currWidthL-newLeafEdgeWidthL+'px'
1311 // Left gets the offset of the current left leaf from the document
1312 var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
1313 // $$$ This seems very similar to the gutter. May be able to consolidate the logic.
1314 // XXX need to recalc
1315 var right = $('#GBtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#GBtwopageview').offset().left-2+'px';
1316 // We change the left leaf to right positioning
1317 $(this.prefetchedImgs[leftLeaf]).css({
1322 left = $(this.prefetchedImgs[leftLeaf]).offset().left - $('#book_div_1').offset().left;
1324 right = left+$(this.prefetchedImgs[leftLeaf]).width()+'px';
1326 $(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
1327 //$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
1331 this.removeSearchHilites();
1333 //console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
1334 $(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
1336 //console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
1337 $(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
1339 //console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
1340 $(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
1341 $(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
1343 $(self.leafEdgeR).css({
1344 // Moves the right leaf edge
1345 width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
1346 left: gutter+newWidthR+'px'
1349 $(self.leafEdgeL).css({
1350 // Moves and resizes the left leaf edge
1351 width: newLeafEdgeWidthL+'px',
1352 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
1356 $(self.twoPageDiv).css({
1357 // Resizes the brown border div
1358 width: newWidthL+newWidthR+self.twoPage.edgeWidth+20+'px',
1359 left: gutter-newWidthL-newLeafEdgeWidthL-10+'px'
1362 $(self.leafEdgeTmp).remove();
1363 self.leafEdgeTmp = null;
1365 self.twoPage.currentIndexL = newIndexL;
1366 self.twoPage.currentIndexR = newIndexR;
1367 self.firstIndex = self.twoPage.currentIndexL;
1368 self.displayedIndices = [newIndexL, newIndexR];
1369 self.setClickHandlers();
1370 self.pruneUnusedImgs();
1372 self.animating = false;
1374 self.updateSearchHilites2UP();
1375 self.updatePageNumBox2UP();
1377 if (self.animationFinishedCallback) {
1378 self.animationFinishedCallback();
1379 self.animationFinishedCallback = null;
1387 //______________________________________________________________________________
1388 // Whether we flip left or right is dependent on the page progression
1389 // to flip forward one spread, pass index=null
1390 GnuBook.prototype.flipFwdToIndex = function(index) {
1392 if (this.animating) return;
1394 if (null != this.leafEdgeTmp) {
1395 alert('error: leafEdgeTmp should be null!');
1399 if (null == index) {
1400 index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
1402 if (index > this.lastDisplayableIndex()) return;
1404 this.animating = true;
1406 var nextIndices = this.getSpreadIndices(index);
1408 //console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
1410 if ('rl' != this.pageProgression) {
1411 // We did not specify RTL
1412 var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
1413 this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
1416 var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
1417 this.flipLeftToRight(nextIndices[0], nextIndices[1], gutter);
1421 // flipRightToLeft(nextL, nextR, gutter)
1422 // $$$ better not to have to pass gutter in
1423 //______________________________________________________________________________
1424 // Flip from left to right and show the nextL and nextR indices on those sides
1425 GnuBook.prototype.flipRightToLeft = function(newIndexL, newIndexR, gutter) {
1426 var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
1427 var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
1428 var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
1429 var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
1431 var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
1433 var top = ($('#GBtwopageview').height() - this.twoPage.height) >> 1;
1435 var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
1437 var middle = ($('#GBtwopageview').attr('clientWidth') >> 1);
1438 var currGutter = middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
1441 console.log('R->L middle(' + middle +') currGutter(' + currGutter + ') gutter(' + gutter + ')');
1443 this.leafEdgeTmp = document.createElement('div');
1444 $(this.leafEdgeTmp).css({
1445 borderStyle: 'solid none solid solid',
1446 borderColor: 'rgb(51, 51, 34)',
1447 borderWidth: '1px 0px 1px 1px',
1448 background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
1449 width: leafEdgeTmpW + 'px',
1450 height: this.twoPage.height-1 + 'px',
1451 left: currGutter+scaledW+'px',
1453 position: 'absolute',
1455 }).appendTo('#GBtwopageview');
1457 //var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
1458 //var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
1460 var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
1461 var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
1462 var newWidthL = this.getPageWidth2UP(newIndexL);
1463 var newWidthR = this.getPageWidth2UP(newIndexR);
1465 $(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
1467 var self = this; // closure-tastic!
1469 var speed = this.flipSpeed;
1471 this.removeSearchHilites();
1473 $(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
1474 $(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
1475 $(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
1476 $(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
1477 $(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
1479 $(self.leafEdgeL).css({
1480 width: newLeafEdgeWidthL+'px',
1481 left: gutter-newWidthL-newLeafEdgeWidthL+'px'
1484 $(self.twoPageDiv).css({
1485 width: newWidthL+newWidthR+self.twoPage.edgeWidth+20+'px',
1486 left: gutter-newWidthL-newLeafEdgeWidthL-10+'px'
1489 $(self.leafEdgeTmp).remove();
1490 self.leafEdgeTmp = null;
1492 self.twoPage.currentIndexL = newIndexL;
1493 self.twoPage.currentIndexR = newIndexR;
1494 self.firstIndex = self.twoPage.currentIndexL;
1495 self.displayedIndices = [newIndexL, newIndexR];
1496 self.setClickHandlers();
1497 self.pruneUnusedImgs();
1499 self.animating = false;
1502 self.updateSearchHilites2UP();
1503 self.updatePageNumBox2UP();
1505 if (self.animationFinishedCallback) {
1506 self.animationFinishedCallback();
1507 self.animationFinishedCallback = null;
1514 //______________________________________________________________________________
1515 GnuBook.prototype.setClickHandlers = function() {
1517 // $$$ TODO don't set again if already set
1518 $(this.prefetchedImgs[this.twoPage.currentIndexL]).click(function() {
1523 $(this.prefetchedImgs[this.twoPage.currentIndexR]).click(function() {
1531 //______________________________________________________________________________
1532 GnuBook.prototype.prefetchImg = function(index) {
1533 if (undefined == this.prefetchedImgs[index]) {
1534 //console.log('prefetching ' + index);
1535 var img = document.createElement("img");
1536 img.src = this.getPageURI(index);
1537 this.prefetchedImgs[index] = img;
1542 // prepareFlipLeftToRight()
1544 //______________________________________________________________________________
1546 // Prepare to flip the left page towards the right. This corresponds to moving
1547 // backward when the page progression is left to right.
1548 GnuBook.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
1550 //console.log(' preparing left->right for ' + prevL + ',' + prevR);
1552 this.prefetchImg(prevL);
1553 this.prefetchImg(prevR);
1555 var height = this.getPageHeight(prevL);
1556 var width = this.getPageWidth(prevL);
1557 var middle = ($('#GBtwopageview').attr('clientWidth') >> 1);
1558 var top = ($('#GBtwopageview').height() - this.twoPage.height) >> 1;
1559 var scaledW = this.twoPage.height*width/height;
1561 // The gutter is the dividing line between the left and right pages.
1562 // It is offset from the middle to create the illusion of thickness to the pages
1563 var gutter = middle + this.gutterOffsetForIndex(prevL);
1566 console.log(' gutter for ' + prevL + ' is ' + gutter);
1567 //console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
1568 //console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
1570 $(this.prefetchedImgs[prevL]).css({
1571 position: 'absolute',
1572 /*right: middle+'px',*/
1573 left: gutter-scaledW+'px',
1576 backgroundColor: 'rgb(234, 226, 205)',
1577 height: this.twoPage.height,
1578 width: scaledW+'px',
1579 borderRight: '1px solid black',
1583 $('#GBtwopageview').append(this.prefetchedImgs[prevL]);
1585 //console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
1587 $(this.prefetchedImgs[prevR]).css({
1588 position: 'absolute',
1592 backgroundColor: 'rgb(234, 226, 205)',
1593 height: this.twoPage.height,
1595 borderLeft: '1px solid black',
1599 $('#GBtwopageview').append(this.prefetchedImgs[prevR]);
1606 // XXXmang we're adding an extra pixel in the middle
1607 // prepareFlipRightToLeft()
1608 //______________________________________________________________________________
1609 GnuBook.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
1611 //console.log(' preparing left<-right for ' + nextL + ',' + nextR);
1613 this.prefetchImg(nextL);
1614 this.prefetchImg(nextR);
1616 var height = this.getPageHeight(nextR);
1617 var width = this.getPageWidth(nextR);
1618 var middle = ($('#GBtwopageview').attr('clientWidth') >> 1);
1619 var top = ($('#GBtwopageview').height() - this.twoPage.height) >> 1;
1620 var scaledW = this.twoPage.height*width/height;
1622 var gutter = middle + this.gutterOffsetForIndex(nextL);
1624 console.log('right to left to %d gutter is %d', nextL, gutter); // XXX
1626 //console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
1627 $(this.prefetchedImgs[nextR]).css({
1628 position: 'absolute',
1631 backgroundColor: 'rgb(234, 226, 205)',
1632 height: this.twoPage.height,
1633 width: scaledW+'px',
1634 borderLeft: '1px solid black',
1638 $('#GBtwopageview').append(this.prefetchedImgs[nextR]);
1640 height = this.getPageHeight(nextL);
1641 width = this.getPageWidth(nextL);
1642 scaledW = this.twoPage.height*width/height;
1644 //console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#GBcontainer').width()-gutter);
1645 $(this.prefetchedImgs[nextL]).css({
1646 position: 'absolute',
1647 right: $('#GBtwopageview').attr('clientWidth')-gutter+'px',
1649 backgroundColor: 'rgb(234, 226, 205)',
1650 height: this.twoPage.height,
1652 borderRight: '1px solid black',
1656 $('#GBtwopageview').append(this.prefetchedImgs[nextL]);
1662 // getNextLeafs() -- NOT RTL AWARE
1663 //______________________________________________________________________________
1664 // GnuBook.prototype.getNextLeafs = function(o) {
1665 // //TODO: we might have two left or two right leafs in a row (damaged book)
1666 // //For now, assume that leafs are contiguous.
1668 // //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
1669 // o.L = this.twoPage.currentIndexL+2;
1670 // o.R = this.twoPage.currentIndexL+3;
1673 // getprevLeafs() -- NOT RTL AWARE
1674 //______________________________________________________________________________
1675 // GnuBook.prototype.getPrevLeafs = function(o) {
1676 // //TODO: we might have two left or two right leafs in a row (damaged book)
1677 // //For now, assume that leafs are contiguous.
1679 // //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
1680 // o.L = this.twoPage.currentIndexL-2;
1681 // o.R = this.twoPage.currentIndexL-1;
1684 // pruneUnusedImgs()
1685 //______________________________________________________________________________
1686 GnuBook.prototype.pruneUnusedImgs = function() {
1687 //console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
1688 for (var key in this.prefetchedImgs) {
1689 //console.log('key is ' + key);
1690 if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
1691 //console.log('removing key '+ key);
1692 $(this.prefetchedImgs[key]).remove();
1694 if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
1695 //console.log('deleting key '+ key);
1696 delete this.prefetchedImgs[key];
1702 //______________________________________________________________________________
1703 GnuBook.prototype.prefetch = function() {
1705 var lim = this.twoPage.currentIndexL-4;
1707 lim = Math.max(lim, 0);
1708 for (i = lim; i < this.twoPage.currentIndexL; i++) {
1709 this.prefetchImg(i);
1712 if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
1713 lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
1714 for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
1715 this.prefetchImg(i);
1720 // getPageWidth2UP()
1721 //______________________________________________________________________________
1722 GnuBook.prototype.getPageWidth2UP = function(index) {
1723 // We return the width based on the dominant height
1724 var height = this.getPageHeight(index);
1725 var width = this.getPageWidth(index);
1726 return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
1730 //______________________________________________________________________________
1731 GnuBook.prototype.search = function(term) {
1732 $('#GnuBookSearchScript').remove();
1733 var script = document.createElement("script");
1734 script.setAttribute('id', 'GnuBookSearchScript');
1735 script.setAttribute("type", "text/javascript");
1736 script.setAttribute("src", 'http://'+this.server+'/GnuBook/flipbook_search_gb.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=gb.GBSearchCallback');
1737 document.getElementsByTagName('head')[0].appendChild(script);
1738 $('#GnuBookSearchResults').html('Searching...');
1741 // GBSearchCallback()
1742 //______________________________________________________________________________
1743 GnuBook.prototype.GBSearchCallback = function(txt) {
1745 if (jQuery.browser.msie) {
1746 var dom=new ActiveXObject("Microsoft.XMLDOM");
1750 var parser = new DOMParser();
1751 var dom = parser.parseFromString(txt, "text/xml");
1754 $('#GnuBookSearchResults').empty();
1755 $('#GnuBookSearchResults').append('<ul>');
1757 for (var key in this.searchResults) {
1758 if (null != this.searchResults[key].div) {
1759 $(this.searchResults[key].div).remove();
1761 delete this.searchResults[key];
1764 var pages = dom.getElementsByTagName('PAGE');
1766 if (0 == pages.length) {
1767 // $$$ it would be nice to echo the (sanitized) search result here
1768 $('#GnuBookSearchResults').append('<li>No search results found</li>');
1770 for (var i = 0; i < pages.length; i++){
1771 //console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
1774 var re = new RegExp (/_(\d{4})/);
1775 var reMatch = re.exec(pages[i].getAttribute('file'));
1776 var index = parseInt(reMatch[1], 10);
1777 //var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
1779 var children = pages[i].childNodes;
1781 for (var j=0; j<children.length; j++) {
1782 //console.log(j + ' - ' + children[j].nodeName);
1783 //console.log(children[j].firstChild.nodeValue);
1784 if ('CONTEXT' == children[j].nodeName) {
1785 context += children[j].firstChild.nodeValue;
1786 } else if ('WORD' == children[j].nodeName) {
1787 context += '<b>'+children[j].firstChild.nodeValue+'</b>';
1789 var index = this.leafNumToIndex(index);
1790 if (null != index) {
1791 //coordinates are [left, bottom, right, top, [baseline]]
1792 //we'll skip baseline for now...
1793 var coords = children[j].getAttribute('coords').split(',',4);
1794 if (4 == coords.length) {
1795 this.searchResults[index] = {'l':coords[0], 'b':coords[1], 'r':coords[2], 't':coords[3], 'div':null};
1800 var pageName = this.getPageName(index);
1801 //TODO: remove hardcoded instance name
1802 $('#GnuBookSearchResults').append('<li><b><a href="javascript:gb.jumpToIndex('+index+');">' + pageName + '</a></b> - ' + context + '</li>');
1805 $('#GnuBookSearchResults').append('</ul>');
1807 this.updateSearchHilites();
1810 // updateSearchHilites()
1811 //______________________________________________________________________________
1812 GnuBook.prototype.updateSearchHilites = function() {
1813 if (2 == this.mode) {
1814 this.updateSearchHilites2UP();
1816 this.updateSearchHilites1UP();
1820 // showSearchHilites1UP()
1821 //______________________________________________________________________________
1822 GnuBook.prototype.updateSearchHilites1UP = function() {
1824 for (var key in this.searchResults) {
1826 if (-1 != jQuery.inArray(parseInt(key), this.displayedIndices)) {
1827 var result = this.searchResults[key];
1828 if(null == result.div) {
1829 result.div = document.createElement('div');
1830 $(result.div).attr('className', 'GnuBookSearchHilite').appendTo('#pagediv'+key);
1831 //console.log('appending ' + key);
1834 width: (result.r-result.l)/this.reduce + 'px',
1835 height: (result.b-result.t)/this.reduce + 'px',
1836 left: (result.l)/this.reduce + 'px',
1837 top: (result.t)/this.reduce +'px'
1841 //console.log(key + ' not displayed');
1842 this.searchResults[key].div=null;
1847 // XXX move, clean up, use everywhere
1848 GnuBook.prototype.twoPageGutter = function() {
1849 return this.twoPage.middle + this.gutterOffsetForIndex(this.twoPage.currentIndexL);
1852 // XXX move, clean up, use everywhere
1853 GnuBook.prototype.twoPageTop = function() {
1854 return this.twoPage.coverExternalPadding + this.twoPage.coverInternalPadding; // $$$ + border?
1857 // showSearchHilites2UP()
1858 //______________________________________________________________________________
1859 GnuBook.prototype.updateSearchHilites2UP = function() {
1861 for (var key in this.searchResults) {
1862 key = parseInt(key, 10);
1863 if (-1 != jQuery.inArray(key, this.displayedIndices)) {
1864 var result = this.searchResults[key];
1865 if(null == result.div) {
1866 result.div = document.createElement('div');
1867 $(result.div).attr('className', 'GnuBookSearchHilite').css('zIndex', 3).appendTo('#GBtwopageview');
1868 //console.log('appending ' + key);
1871 // We calculate the reduction factor for the specific page because it can be different
1872 // for each page in the spread
1873 var height = this.getPageHeight(key);
1874 var width = this.getPageWidth(key)
1875 var reduce = this.twoPage.height/height;
1876 var scaledW = parseInt(width*reduce);
1878 var gutter = this.twoPageGutter();
1880 if ('L' == this.getPageSide(key)) {
1881 pageL = gutter-scaledW;
1885 var pageT = this.twoPageTop();
1888 width: (result.r-result.l)*reduce + 'px',
1889 height: (result.b-result.t)*reduce + 'px',
1890 left: pageL+(result.l)*reduce + 'px',
1891 top: pageT+(result.t)*reduce +'px'
1895 //console.log(key + ' not displayed');
1896 if (null != this.searchResults[key].div) {
1897 //console.log('removing ' + key);
1898 $(this.searchResults[key].div).remove();
1900 this.searchResults[key].div=null;
1905 // removeSearchHilites()
1906 //______________________________________________________________________________
1907 GnuBook.prototype.removeSearchHilites = function() {
1908 for (var key in this.searchResults) {
1909 if (null != this.searchResults[key].div) {
1910 $(this.searchResults[key].div).remove();
1911 this.searchResults[key].div=null;
1917 //______________________________________________________________________________
1918 GnuBook.prototype.showEmbedCode = function() {
1919 if (null != this.embedPopup) { // check if already showing
1923 this.embedPopup = document.createElement("div");
1924 $(this.embedPopup).css({
1925 position: 'absolute',
1927 left: ($('#GBcontainer').attr('clientWidth')-400)/2 + 'px',
1930 border: "3px double #999999",
1932 backgroundColor: "#fff"
1933 }).appendTo('#GnuBook');
1935 htmlStr = '<p style="text-align:center;"><b>Embed Bookreader in your blog!</b></p>';
1936 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>';
1937 htmlStr += '<p>Embed Code: <input type="text" size="40" value="' + this.getEmbedCode() + '"></p>';
1938 htmlStr += '<p style="text-align:center;"><a href="" onclick="gb.embedPopup = null; $(this.parentNode.parentNode).remove(); return false">Close popup</a></p>';
1940 this.embedPopup.innerHTML = htmlStr;
1941 $(this.embedPopup).find('input').bind('click', function() {
1947 //______________________________________________________________________________
1948 GnuBook.prototype.autoToggle = function() {
1950 var bComingFrom1up = false;
1951 if (2 != this.mode) {
1952 bComingFrom1up = true;
1957 if (null == this.autoTimer) {
1958 this.flipSpeed = 2000;
1960 // $$$ Draw events currently cause layout problems when they occur during animation.
1961 // There is a specific problem when changing from 1-up immediately to autoplay in RTL so
1962 // we workaround for now by not triggering immediate animation in that case.
1963 // See https://bugs.launchpad.net/gnubook/+bug/328327
1964 if (('rl' == this.pageProgression) && bComingFrom1up) {
1965 // don't flip immediately -- wait until timer fires
1968 this.flipFwdToIndex();
1971 $('#GBtoolbar .play').hide();
1972 $('#GBtoolbar .pause').show();
1973 this.autoTimer=setInterval(function(){
1974 if (self.animating) {return;}
1976 if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
1977 self.flipBackToIndex(1); // $$$ really what we want?
1979 self.flipFwdToIndex();
1988 //______________________________________________________________________________
1989 GnuBook.prototype.autoStop = function() {
1990 if (null != this.autoTimer) {
1991 clearInterval(this.autoTimer);
1992 this.flipSpeed = 'fast';
1993 $('#GBtoolbar .pause').hide();
1994 $('#GBtoolbar .play').show();
1995 this.autoTimer = null;
1999 // keyboardNavigationIsDisabled(event)
2000 // - returns true if keyboard navigation should be disabled for the event
2001 //______________________________________________________________________________
2002 GnuBook.prototype.keyboardNavigationIsDisabled = function(event) {
2003 if (event.target.tagName == "INPUT") {
2009 // gutterOffsetForIndex
2010 //______________________________________________________________________________
2012 // Returns the gutter offset for the spread containing the given index.
2013 // This function supports RTL
2014 GnuBook.prototype.gutterOffsetForIndex = function(pindex) {
2016 // To find the offset of the gutter from the middle we calculate our percentage distance
2017 // through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
2018 var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
2020 // But then again for RTL it's the opposite
2021 if ('rl' == this.pageProgression) {
2029 //______________________________________________________________________________
2030 // Returns the width of the leaf edge div for the page with index given
2031 GnuBook.prototype.leafEdgeWidth = function(pindex) {
2032 // $$$ could there be single pixel rounding errors for L vs R?
2033 if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
2034 return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
2036 return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
2040 // jumpIndexForLeftEdgePageX
2041 //______________________________________________________________________________
2042 // Returns the target jump leaf given a page coordinate (inside the left page edge div)
2043 GnuBook.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
2044 if ('rl' != this.pageProgression) {
2045 // LTR - flipping backward
2046 var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
2048 // browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
2049 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
2053 var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
2054 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
2059 // jumpIndexForRightEdgePageX
2060 //______________________________________________________________________________
2061 // Returns the target jump leaf given a page coordinate (inside the right page edge div)
2062 GnuBook.prototype.jumpIndexForRightEdgePageX = function(pageX) {
2063 if ('rl' != this.pageProgression) {
2065 var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
2066 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
2069 var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
2070 jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
2075 GnuBook.prototype.initToolbar = function(mode, ui) {
2077 $("#GnuBook").append("<div id='GBtoolbar'><span style='float:left;'>"
2078 + "<a class='GBicon logo rollover' href='" + this.logoURL + "'> </a>"
2079 + " <button class='GBicon rollover zoom_out' onclick='gb.zoom(-1); return false;'/>"
2080 + "<button class='GBicon rollover zoom_in' onclick='gb.zoom(1); return false;'/>"
2081 + " <span class='label'>Zoom: <span id='GBzoom'>"+parseInt(100/this.reduce)+"</span>%</span>"
2082 + " <button class='GBicon rollover one_page_mode' onclick='gb.switchMode(1); return false;'/>"
2083 + " <button class='GBicon rollover two_page_mode' onclick='gb.switchMode(2); return false;'/>"
2084 + " <a class='GBblack title' href='"+this.bookUrl+"' target='_blank'>"+this.shortTitle(50)+"</a>"
2087 if (ui == "embed") {
2088 $("#GnuBook a.logo").attr("target","_blank");
2091 // $$$ turn this into a member variable
2092 var jToolbar = $('#GBtoolbar'); // j prefix indicates jQuery object
2094 // We build in mode 2
2095 jToolbar.append("<span id='GBtoolbarbuttons' style='float: right'>"
2096 + "<button class='GBicon rollover embed' />"
2097 + "<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>"
2098 + "<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>"
2099 + "<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>"
2100 + "<button class='GBicon rollover play' /><button class='GBicon rollover pause' style='display: none' /></span>");
2102 this.bindToolbarNavHandlers(jToolbar);
2104 // Setup tooltips -- later we could load these from a file for i18n
2105 var titles = { '.logo': 'Go to Archive.org',
2106 '.zoom_in': 'Zoom in',
2107 '.zoom_out': 'Zoom out',
2108 '.one_page_mode': 'One-page view',
2109 '.two_page_mode': 'Two-page view',
2110 '.embed': 'Embed bookreader',
2111 '.book_left': 'Flip left',
2112 '.book_right': 'Flip right',
2113 '.book_up': 'Page up',
2114 '.book_down': 'Page down',
2117 '.book_top': 'First page',
2118 '.book_bottom': 'Last page'
2120 if ('rl' == this.pageProgression) {
2121 titles['.book_leftmost'] = 'Last page';
2122 titles['.book_rightmost'] = 'First page';
2124 titles['.book_leftmost'] = 'First page';
2125 titles['.book_rightmost'] = 'Last page';
2128 for (var icon in titles) {
2129 jToolbar.find(icon).attr('title', titles[icon]);
2132 // Hide mode buttons and autoplay if 2up is not available
2133 // $$$ if we end up with more than two modes we should show the applicable buttons
2134 if ( !this.canSwitchToMode(this.constMode2up) ) {
2135 jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
2138 // Switch to requested mode -- binds other click handlers
2139 this.switchToolbarMode(mode);
2144 // switchToolbarMode
2145 //______________________________________________________________________________
2146 // Update the toolbar for the given mode (changes navigation buttons)
2147 // $$$ we should soon split the toolbar out into its own module
2148 GnuBook.prototype.switchToolbarMode = function(mode) {
2151 $('#GBtoolbar .GBtoolbarmode2').hide();
2152 $('#GBtoolbar .GBtoolbarmode1').show().css('display', 'inline');
2155 $('#GBtoolbar .GBtoolbarmode1').hide();
2156 $('#GBtoolbar .GBtoolbarmode2').show().css('display', 'inline');
2160 // bindToolbarNavHandlers
2161 //______________________________________________________________________________
2162 // Binds the toolbar handlers
2163 GnuBook.prototype.bindToolbarNavHandlers = function(jToolbar) {
2165 jToolbar.find('.book_left').bind('click', function(e) {
2170 jToolbar.find('.book_right').bind('click', function(e) {
2175 jToolbar.find('.book_up').bind('click', function(e) {
2180 jToolbar.find('.book_down').bind('click', function(e) {
2185 jToolbar.find('.embed').bind('click', function(e) {
2190 jToolbar.find('.play').bind('click', function(e) {
2195 jToolbar.find('.pause').bind('click', function(e) {
2200 jToolbar.find('.book_top').bind('click', function(e) {
2205 jToolbar.find('.book_bottom').bind('click', function(e) {
2210 jToolbar.find('.book_leftmost').bind('click', function(e) {
2215 jToolbar.find('.book_rightmost').bind('click', function(e) {
2221 // updateToolbarZoom(reduce)
2222 //______________________________________________________________________________
2223 // Update the displayed zoom factor based on reduction factor
2224 GnuBook.prototype.updateToolbarZoom = function(reduce) {
2225 // $$$ TODO: Move toolbar to it's own object/plugin
2226 $('#GBzoom').text(parseInt(100/reduce));
2229 // firstDisplayableIndex
2230 //______________________________________________________________________________
2231 // Returns the index of the first visible page, dependent on the mode.
2232 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
2233 // this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
2234 GnuBook.prototype.firstDisplayableIndex = function() {
2235 if (this.mode == 0) {
2238 return 1; // $$$ we assume there are enough pages... we need logic for very short books
2242 // lastDisplayableIndex
2243 //______________________________________________________________________________
2244 // Returns the index of the last visible page, dependent on the mode.
2245 // $$$ Currently we cannot display the front/back cover in 2-up and will need to update
2246 // this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
2247 GnuBook.prototype.lastDisplayableIndex = function() {
2248 if (this.mode == 2) {
2249 if (this.lastDisplayableIndex2up === null) {
2250 // Calculate and cache
2251 var candidate = this.numLeafs - 1;
2252 for ( ; candidate >= 0; candidate--) {
2253 var spreadIndices = this.getSpreadIndices(candidate);
2254 if (Math.max(spreadIndices[0], spreadIndices[1]) < (this.numLeafs - 1)) {
2258 this.lastDisplayableIndex2up = candidate;
2260 return this.lastDisplayableIndex2up;
2262 return this.numLeafs - 1;
2266 // shortTitle(maximumCharacters)
2268 // Returns a shortened version of the title with the maximum number of characters
2269 GnuBook.prototype.shortTitle = function(maximumCharacters) {
2270 if (this.bookTitle.length < maximumCharacters) {
2271 return this.bookTitle;
2274 var title = this.bookTitle.substr(0, maximumCharacters - 3);
2281 // Parameter related functions
2283 // updateFromParams(params)
2285 // Update ourselves from the params object.
2287 // e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
2288 GnuBook.prototype.updateFromParams = function(params) {
2289 if ('undefined' != typeof(params.mode)) {
2290 this.switchMode(params.mode);
2293 // $$$ process /search
2294 // $$$ process /zoom
2296 // We only respect page if index is not set
2297 if ('undefined' != typeof(params.index)) {
2298 if (params.index != this.currentIndex()) {
2299 this.jumpToIndex(params.index);
2301 } else if ('undefined' != typeof(params.page)) {
2302 // $$$ this assumes page numbers are unique
2303 if (params.page != this.getPageNum(this.currentIndex())) {
2304 this.jumpToPage(params.page);
2308 // $$$ process /region
2309 // $$$ process /highlight
2312 // paramsFromFragment(urlFragment)
2314 // Returns a object with configuration parametes from a URL fragment.
2316 // E.g paramsFromFragment(window.location.hash)
2317 GnuBook.prototype.paramsFromFragment = function(urlFragment) {
2318 // URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
2322 // For convenience we allow an initial # character (as from window.location.hash)
2323 // but don't require it
2324 if (urlFragment.substr(0,1) == '#') {
2325 urlFragment = urlFragment.substr(1);
2328 // Simple #nn syntax
2329 var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
2330 if ( !isNaN(oldStyleLeafNum) ) {
2331 params.index = oldStyleLeafNum;
2333 // Done processing if using old-style syntax
2337 // Split into key-value pairs
2338 var urlArray = urlFragment.split('/');
2340 for (var i = 0; i < urlArray.length; i += 2) {
2341 urlHash[urlArray[i]] = urlArray[i+1];
2345 if ('1up' == urlHash['mode']) {
2346 params.mode = this.constMode1up;
2347 } else if ('2up' == urlHash['mode']) {
2348 params.mode = this.constMode2up;
2352 if ('undefined' != typeof(urlHash['page'])) {
2353 // page was set -- may not be int
2354 params.page = urlHash['page'];
2357 // $$$ process /region
2358 // $$$ process /search
2359 // $$$ process /highlight
2364 // paramsFromCurrent()
2366 // Create a params object from the current parameters.
2367 GnuBook.prototype.paramsFromCurrent = function() {
2371 var pageNum = this.getPageNum(this.currentIndex());
2372 if ((pageNum === 0) || pageNum) {
2373 params.page = pageNum;
2376 params.index = this.currentIndex();
2377 params.mode = this.mode;
2386 // fragmentFromParams(params)
2388 // Create a fragment string from the params object.
2389 // See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
2390 GnuBook.prototype.fragmentFromParams = function(params) {
2391 var separator = '/';
2395 if ('undefined' != typeof(params.page)) {
2396 fragments.push('page', params.page);
2398 // Don't have page numbering -- use index instead
2399 fragments.push('page', 'n' + params.index);
2407 if ('undefined' != typeof(params.mode)) {
2408 if (params.mode == this.constMode1up) {
2409 fragments.push('mode', '1up');
2410 } else if (params.mode == this.constMode2up) {
2411 fragments.push('mode', '2up');
2413 throw 'fragmentFromParams called with unknown mode ' + params.mode;
2417 return fragments.join(separator);
2420 // getPageIndex(pageNum)
2422 // Returns the *highest* index the given page number, or undefined
2423 GnuBook.prototype.getPageIndex = function(pageNum) {
2424 var pageIndices = this.getPageIndices(pageNum);
2426 if (pageIndices.length > 0) {
2427 return pageIndices[pageIndices.length - 1];
2433 // getPageIndices(pageNum)
2435 // Returns an array (possibly empty) of the indices with the given page number
2436 GnuBook.prototype.getPageIndices = function(pageNum) {
2439 // Check for special "nXX" page number
2440 if (pageNum.slice(0,1) == 'n') {
2442 var pageIntStr = pageNum.slice(1, pageNum.length);
2443 var pageIndex = parseInt(pageIntStr);
2444 indices.append(pageIndex);
2447 // Do nothing... will run through page names and see if one matches
2452 for (i=0; i<this.numLeafs; i++) {
2453 if (this.getPageNum(i) == pageNum) {
2461 // getPageName(index)
2463 // Returns the name of the page as it should be displayed in the user interface
2464 GnuBook.prototype.getPageName = function(index) {
2465 return 'Page ' + this.getPageNum(index);
2468 // updateLocationHash
2470 // Update the location hash from the current parameters. Call this instead of manually
2471 // using window.location.replace
2472 GnuBook.prototype.updateLocationHash = function() {
2473 var newHash = '#' + this.fragmentFromParams(this.paramsFromCurrent());
2474 window.location.replace(newHash);
2476 // This is the variable checked in the timer. Only user-generated changes
2477 // to the URL will trigger the event.
2478 this.oldLocationHash = newHash;
2481 // startLocationPolling
2483 // Starts polling of window.location to see hash fragment changes
2484 GnuBook.prototype.startLocationPolling = function() {
2485 var self = this; // remember who I am
2486 self.oldLocationHash = window.location.hash;
2488 if (this.locationPollId) {
2489 clearInterval(this.locationPollID);
2490 this.locationPollId = null;
2493 this.locationPollId = setInterval(function() {
2494 var newHash = window.location.hash;
2495 if (newHash != self.oldLocationHash) {
2496 if (newHash != self.oldUserHash) { // Only process new user hash once
2497 //console.log('url change detected ' + self.oldLocationHash + " -> " + newHash);
2499 // Queue change if animating
2500 if (self.animating) {
2502 self.animationFinishedCallback = function() {
2503 self.updateFromParams(self.paramsFromFragment(newHash));
2505 } else { // update immediately
2506 self.updateFromParams(self.paramsFromFragment(newHash));
2508 self.oldUserHash = newHash;
2516 // Returns a URL for an embedded version of the current book
2517 GnuBook.prototype.getEmbedURL = function() {
2518 // We could generate a URL hash fragment here but for now we just leave at defaults
2519 return 'http://' + window.location.host + '/stream/'+this.bookId + '?ui=embed';
2524 // Returns the embed code HTML fragment suitable for copy and paste
2525 GnuBook.prototype.getEmbedCode = function() {
2526 return "<iframe src='" + this.getEmbedURL() + "' width='480px' height='430px'></iframe>";
2531 // Returns true if we can switch to the requested mode
2532 GnuBook.prototype.canSwitchToMode = function(mode) {
2533 if (mode == this.constMode2up) {
2534 // check there are enough pages to display
2535 // $$$ this is a workaround for the mis-feature that we can't display
2536 // short books in 2up mode
2537 if (this.numLeafs < 6) {
2545 // Library functions
2547 clamp: function(value, min, max) {
2548 return Math.min(Math.max(value, min), max);