/*
Copyright(c)2008-2009 Internet Archive. Software license AGPL version 3.
This file is part of GnuBook.
GnuBook is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GnuBook is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with GnuBook. If not, see .
The GnuBook source is hosted at http://github.com/openlibrary/bookreader/
archive.org cvs $Revision: 26020 $ $Date: 2009-11-13 18:59:08 +0000 (Fri, 13 Nov 2009) $
*/
// GnuBook()
//______________________________________________________________________________
// After you instantiate this object, you must supply the following
// book-specific functions, before calling init(). Some of these functions
// can just be stubs for simple books.
// - getPageWidth()
// - getPageHeight()
// - getPageURI()
// - getPageSide()
// - canRotatePage()
// - getPageNum()
// - getSpreadIndices()
// You must also add a numLeafs property before calling init().
function GnuBook() {
this.reduce = 4;
this.padding = 10;
this.mode = 1; //1 or 2
this.ui = 'full'; // UI mode
this.displayedIndices = [];
//this.indicesToDisplay = [];
this.imgs = {};
this.prefetchedImgs = {}; //an object with numeric keys cooresponding to page index
this.timer = null;
this.animating = false;
this.auto = false;
this.autoTimer = null;
this.flipSpeed = 'fast';
this.twoPagePopUp = null;
this.leafEdgeTmp = null;
this.embedPopup = null;
this.printPopup = null;
this.searchTerm = '';
this.searchResults = {};
this.firstIndex = null;
this.lastDisplayableIndex2up = null;
// We link to index.php to avoid redirect which breaks back button
this.logoURL = 'http://www.archive.org/index.php';
// Base URL for images
this.imagesBaseURL = '/bookreader/images/';
// Mode constants
this.constMode1up = 1;
this.constMode2up = 2;
// Zoom levels
this.reductionFactors = [0.5, 1, 2, 4, 8, 16];
// Object to hold parameters related to 2up mode
this.twoPage = {
coverInternalPadding: 10, // Width of cover
coverExternalPadding: 10, // Padding outside of cover
bookSpineDivWidth: 30, // Width of book spine $$$ consider sizing based on book length
autofit: true
};
// Background color for pages (e.g. when loading page image)
// $$$ TODO dynamically calculate based on page images
this.pageDefaultBackgroundColor = 'rgb(234, 226, 205)';
};
// init()
//______________________________________________________________________________
GnuBook.prototype.init = function() {
var startIndex = undefined;
// Find start index and mode if set in location hash
var params = this.paramsFromFragment(window.location.hash);
if ('undefined' != typeof(params.index)) {
startIndex = params.index;
} else if ('undefined' != typeof(params.page)) {
startIndex = this.getPageIndex(params.page);
}
if ('undefined' == typeof(startIndex)) {
if ('undefined' != typeof(this.titleLeaf)) {
startIndex = this.leafNumToIndex(this.titleLeaf);
}
}
if ('undefined' == typeof(startIndex)) {
startIndex = 0;
}
if ('undefined' != typeof(params.mode)) {
this.mode = params.mode;
}
// Set document title -- may have already been set in enclosing html for
// search engine visibility
document.title = this.shortTitle(50);
// Sanitize parameters
if ( !this.canSwitchToMode( this.mode ) ) {
this.mode = this.constMode1up;
}
$("#GnuBook").empty();
this.initToolbar(this.mode, this.ui); // Build inside of toolbar div
$("#GnuBook").append("");
$("#GBcontainer").append("");
$("#GBcontainer").bind('scroll', this, function(e) {
e.data.loadLeafs();
});
this.setupKeyListeners();
this.startLocationPolling();
$(window).bind('resize', this, function(e) {
//console.log('resize!');
if (1 == e.data.mode) {
//console.log('centering 1page view');
e.data.centerPageView();
$('#GBpageview').empty()
e.data.displayedIndices = [];
e.data.updateSearchHilites(); //deletes hilights but does not call remove()
e.data.loadLeafs();
} else {
//console.log('drawing 2 page view');
// We only need to prepare again in autofit (size of spread changes)
if (e.data.twoPage.autofit) {
e.data.prepareTwoPageView();
} else {
// Re-center if the scrollbars have disappeared
var center = e.data.twoPageGetViewCenter();
var doRecenter = false;
if (e.data.twoPage.totalWidth < $('#GBcontainer').attr('clientWidth')) {
center.percentageX = 0.5;
doRecenter = true;
}
if (e.data.twoPage.totalHeight < $('#GBcontainer').attr('clientHeight')) {
center.percentageY = 0.5;
doRecenter = true;
}
if (doRecenter) {
e.data.twoPageCenterView(center.percentageX, center.percentageY);
}
}
}
});
$('.GBpagediv1up').bind('mousedown', this, function(e) {
// $$$ the purpose of this is to disable selection of the image (makes it turn blue)
// but this also interferes with right-click. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
});
if (1 == this.mode) {
this.resizePageView();
this.firstIndex = startIndex;
this.jumpToIndex(startIndex);
} else {
//this.resizePageView();
this.displayedIndices=[0];
this.firstIndex = startIndex;
this.displayedIndices = [this.firstIndex];
//console.log('titleLeaf: %d', this.titleLeaf);
//console.log('displayedIndices: %s', this.displayedIndices);
this.prepareTwoPageView();
}
// Enact other parts of initial params
this.updateFromParams(params);
}
GnuBook.prototype.setupKeyListeners = function() {
var self = this;
var KEY_PGUP = 33;
var KEY_PGDOWN = 34;
var KEY_END = 35;
var KEY_HOME = 36;
var KEY_LEFT = 37;
var KEY_UP = 38;
var KEY_RIGHT = 39;
var KEY_DOWN = 40;
// We use document here instead of window to avoid a bug in jQuery on IE7
$(document).keydown(function(e) {
// Keyboard navigation
if (!self.keyboardNavigationIsDisabled(e)) {
switch(e.keyCode) {
case KEY_PGUP:
case KEY_UP:
// In 1up mode page scrolling is handled by browser
if (2 == self.mode) {
e.preventDefault();
self.prev();
}
break;
case KEY_DOWN:
case KEY_PGDOWN:
if (2 == self.mode) {
e.preventDefault();
self.next();
}
break;
case KEY_END:
e.preventDefault();
self.last();
break;
case KEY_HOME:
e.preventDefault();
self.first();
break;
case KEY_LEFT:
if (2 == self.mode) {
e.preventDefault();
self.left();
}
break;
case KEY_RIGHT:
if (2 == self.mode) {
e.preventDefault();
self.right();
}
break;
}
}
});
}
// drawLeafs()
//______________________________________________________________________________
GnuBook.prototype.drawLeafs = function() {
if (1 == this.mode) {
this.drawLeafsOnePage();
} else {
this.drawLeafsTwoPage();
}
}
// setDragHandler()
//______________________________________________________________________________
GnuBook.prototype.setDragHandler = function(div) {
div.dragging = false;
$(div).unbind('mousedown').bind('mousedown', function(e) {
e.preventDefault();
//console.log('mousedown at ' + e.pageY);
this.dragging = true;
this.prevMouseX = e.pageX;
this.prevMouseY = e.pageY;
var startX = e.pageX;
var startY = e.pageY;
var startTop = $('#GBcontainer').attr('scrollTop');
var startLeft = $('#GBcontainer').attr('scrollLeft');
});
$(div).unbind('mousemove').bind('mousemove', function(ee) {
ee.preventDefault();
// console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
var offsetX = ee.pageX - this.prevMouseX;
var offsetY = ee.pageY - this.prevMouseY;
if (this.dragging) {
$('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
$('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
}
this.prevMouseX = ee.pageX;
this.prevMouseY = ee.pageY;
});
$(div).unbind('mouseup').bind('mouseup', function(ee) {
ee.preventDefault();
//console.log('mouseup');
this.dragging = false;
});
$(div).unbind('mouseleave').bind('mouseleave', function(e) {
e.preventDefault();
//console.log('mouseleave');
this.dragging = false;
});
$(div).unbind('mouseenter').bind('mouseenter', function(e) {
e.preventDefault();
//console.log('mouseenter');
this.dragging = false;
});
}
// setDragHandler2UP()
//______________________________________________________________________________
GnuBook.prototype.setDragHandler2UP = function(div) {
div.dragging = false;
$(div).unbind('mousedown').bind('mousedown', function(e) {
e.preventDefault();
//console.log('mousedown at ' + e.pageY);
this.dragStart = {x: e.pageX, y: e.pageY };
this.mouseDown = true;
this.dragging = false; // wait until drag distance
this.prevMouseX = e.pageX;
this.prevMouseY = e.pageY;
var startX = e.pageX;
var startY = e.pageY;
var startTop = $('#GBcontainer').attr('scrollTop');
var startLeft = $('#GBcontainer').attr('scrollLeft');
});
$(div).unbind('mousemove').bind('mousemove', function(ee) {
ee.preventDefault();
// console.log('mousemove ' + ee.pageX + ',' + ee.pageY);
var offsetX = ee.pageX - this.prevMouseX;
var offsetY = ee.pageY - this.prevMouseY;
var minDragDistance = 5; // $$$ constant
var distance = Math.max(Math.abs(offsetX), Math.abs(offsetY));
if (this.mouseDown && (distance > minDragDistance)) {
//console.log('drag start!');
this.dragging = true;
}
if (this.dragging) {
$('#GBcontainer').attr('scrollTop', $('#GBcontainer').attr('scrollTop') - offsetY);
$('#GBcontainer').attr('scrollLeft', $('#GBcontainer').attr('scrollLeft') - offsetX);
this.prevMouseX = ee.pageX;
this.prevMouseY = ee.pageY;
}
});
/*
$(div).unbind('mouseup').bind('mouseup', function(ee) {
ee.preventDefault();
//console.log('mouseup');
this.dragging = false;
this.mouseDown = false;
});
*/
$(div).unbind('mouseleave').bind('mouseleave', function(e) {
e.preventDefault();
//console.log('mouseleave');
this.dragging = false;
this.mouseDown = false;
});
$(div).unbind('mouseenter').bind('mouseenter', function(e) {
e.preventDefault();
//console.log('mouseenter');
this.dragging = false;
this.mouseDown = false;
});
}
GnuBook.prototype.setClickHandler2UP = function( element, data, handler) {
//console.log('setting handler');
//console.log(element.tagName);
$(element).unbind('click').bind('click', data, function(e) {
e.preventDefault();
//console.log('click!');
if (this.mouseDown && (!this.dragging)) {
//console.log('click not dragging!');
handler(e);
}
this.dragging = false;
this.mouseDown = false;
});
}
// drawLeafsOnePage()
//______________________________________________________________________________
GnuBook.prototype.drawLeafsOnePage = function() {
//alert('drawing leafs!');
this.timer = null;
var scrollTop = $('#GBcontainer').attr('scrollTop');
var scrollBottom = scrollTop + $('#GBcontainer').height();
//console.log('top=' + scrollTop + ' bottom='+scrollBottom);
var indicesToDisplay = [];
var i;
var leafTop = 0;
var leafBottom = 0;
for (i=0; i=scrollTop=' + (leafTop>=scrollTop));
var topInView = (leafTop >= scrollTop) && (leafTop <= scrollBottom);
var bottomInView = (leafBottom >= scrollTop) && (leafBottom <= scrollBottom);
var middleInView = (leafTop <=scrollTop) && (leafBottom>=scrollBottom);
if (topInView | bottomInView | middleInView) {
//console.log('displayed: ' + this.displayedIndices);
//console.log('to display: ' + i);
indicesToDisplay.push(i);
}
leafTop += height +10;
leafBottom += 10;
}
var firstIndexToDraw = indicesToDisplay[0];
this.firstIndex = firstIndexToDraw;
// Update hash, but only if we're currently displaying a leaf
// Hack that fixes #365790
if (this.displayedIndices.length > 0) {
this.updateLocationHash();
}
if ((0 != firstIndexToDraw) && (1 < this.reduce)) {
firstIndexToDraw--;
indicesToDisplay.unshift(firstIndexToDraw);
}
var lastIndexToDraw = indicesToDisplay[indicesToDisplay.length-1];
if ( ((this.numLeafs-1) != lastIndexToDraw) && (1 < this.reduce) ) {
indicesToDisplay.push(lastIndexToDraw+1);
}
leafTop = 0;
var i;
for (i=0; i>1;
if (left<0) left = 0;
$(div).css('left', left+'px');
$(div).css('width', width+'px');
$(div).css('height', height+'px');
//$(div).text('loading...');
this.setDragHandler(div);
$('#GBpageview').append(div);
var img = document.createElement("img");
img.src = this._getPageURI(index, this.reduce, 0);
$(img).css('width', width+'px');
$(img).css('height', height+'px');
$(div).append(img);
} else {
//console.log("not displaying " + indicesToDisplay[i] + ' score=' + jQuery.inArray(indicesToDisplay[i], this.displayedIndices));
}
leafTop += height +10;
}
for (i=0; i= 8) return;
this.reduce*=2; //zoom out
}
this.resizePageView();
$('#GBpageview').empty()
this.displayedIndices = [];
this.loadLeafs();
this.updateToolbarZoom(this.reduce);
// Recalculate search hilites
this.removeSearchHilites();
this.updateSearchHilites();
}
// resizePageView()
//______________________________________________________________________________
GnuBook.prototype.resizePageView = function() {
var i;
var viewHeight = 0;
//var viewWidth = $('#GBcontainer').width(); //includes scrollBar
var viewWidth = $('#GBcontainer').attr('clientWidth');
var oldScrollTop = $('#GBcontainer').attr('scrollTop');
var oldScrollLeft = $('#GBcontainer').attr('scrollLeft');
var oldPageViewHeight = $('#GBpageview').height();
var oldPageViewWidth = $('#GBpageview').width();
var oldCenterY = this.centerY1up();
var oldCenterX = this.centerX1up();
if (0 != oldPageViewHeight) {
var scrollRatio = oldCenterY / oldPageViewHeight;
} else {
var scrollRatio = 0;
}
for (i=0; iviewWidth) viewWidth=width;
}
$('#GBpageview').height(viewHeight);
$('#GBpageview').width(viewWidth);
var newCenterY = scrollRatio*viewHeight;
var newTop = Math.max(0, Math.floor( newCenterY - $('#GBcontainer').height()/2 ));
$('#GBcontainer').attr('scrollTop', newTop);
// We use clientWidth here to avoid miscalculating due to scroll bar
var newCenterX = oldCenterX * (viewWidth / oldPageViewWidth);
var newLeft = newCenterX - $('#GBcontainer').attr('clientWidth') / 2;
newLeft = Math.max(newLeft, 0);
$('#GBcontainer').attr('scrollLeft', newLeft);
//console.log('oldCenterX ' + oldCenterX + ' newCenterX ' + newCenterX + ' newLeft ' + newLeft);
//this.centerPageView();
this.loadLeafs();
// Not really needed until there is 1up autofit
this.removeSearchHilites();
this.updateSearchHilites();
}
// centerX1up()
//______________________________________________________________________________
// Returns the current offset of the viewport center in scaled document coordinates.
GnuBook.prototype.centerX1up = function() {
var centerX;
if ($('#GBpageview').width() < $('#GBcontainer').attr('clientWidth')) { // fully shown
centerX = $('#GBpageview').width();
} else {
centerX = $('#GBcontainer').attr('scrollLeft') + $('#GBcontainer').attr('clientWidth') / 2;
}
centerX = Math.floor(centerX);
return centerX;
}
// centerY1up()
//______________________________________________________________________________
// Returns the current offset of the viewport center in scaled document coordinates.
GnuBook.prototype.centerY1up = function() {
var centerY = $('#GBcontainer').attr('scrollTop') + $('#GBcontainer').height() / 2;
return Math.floor(centerY);
}
// centerPageView()
//______________________________________________________________________________
GnuBook.prototype.centerPageView = function() {
var scrollWidth = $('#GBcontainer').attr('scrollWidth');
var clientWidth = $('#GBcontainer').attr('clientWidth');
//console.log('sW='+scrollWidth+' cW='+clientWidth);
if (scrollWidth > clientWidth) {
$('#GBcontainer').attr('scrollLeft', (scrollWidth-clientWidth)/2);
}
}
// zoom2up(direction)
//______________________________________________________________________________
GnuBook.prototype.zoom2up = function(direction) {
// Hard stop autoplay
this.stopFlipAnimations();
// Get new zoom state
var newZoom = this.twoPageNextReduce(this.reduce, direction);
if ((this.reduce == newZoom.reduce) && (this.twoPage.autofit == newZoom.autofit)) {
return;
}
this.twoPage.autofit = newZoom.autofit;
this.reduce = newZoom.reduce;
// Preserve view center position
var oldCenter = this.twoPageGetViewCenter();
// If zooming in, reload imgs. DOM elements will be removed by prepareTwoPageView
// $$$ An improvement would be to use the low res image until the larger one is loaded.
if (1 == direction) {
for (var img in this.prefetchedImgs) {
delete this.prefetchedImgs[img];
}
}
// Prepare view with new center to minimize visual glitches
this.prepareTwoPageView(oldCenter.percentageX, oldCenter.percentageY);
}
// quantizeReduce(reduce)
//______________________________________________________________________________
// Quantizes the given reduction factor to closest power of two from set from 12.5% to 200%
GnuBook.prototype.quantizeReduce = function(reduce) {
var quantized = this.reductionFactors[0];
var distance = Math.abs(reduce - quantized);
for (var i = 1; i < this.reductionFactors.length; i++) {
newDistance = Math.abs(reduce - this.reductionFactors[i]);
if (newDistance < distance) {
distance = newDistance;
quantized = this.reductionFactors[i];
}
}
return quantized;
}
// twoPageNextReduce()
//______________________________________________________________________________
// Returns the next reduction level
GnuBook.prototype.twoPageNextReduce = function(reduce, direction) {
var result = {};
var autofitReduce = this.twoPageGetAutofitReduce();
if (0 == direction) { // autofit
result.autofit = true;
result.reduce = autofitReduce;
} else if (1 == direction) { // zoom in
var newReduce = this.reductionFactors[0];
for (var i = 1; i < this.reductionFactors.length; i++) {
if (this.reductionFactors[i] < reduce) {
newReduce = this.reductionFactors[i];
}
}
if (!this.twoPage.autofit && (autofitReduce < reduce && autofitReduce > newReduce)) {
// use autofit
result.autofit = true;
result.reduce = autofitReduce;
} else {
result.autofit = false;
result.reduce = newReduce;
}
} else { // zoom out
var lastIndex = this.reductionFactors.length - 1;
var newReduce = this.reductionFactors[lastIndex];
for (var i = lastIndex; i >= 0; i--) {
if (this.reductionFactors[i] > reduce) {
newReduce = this.reductionFactors[i];
}
}
if (!this.twoPage.autofit && (autofitReduce > reduce && autofitReduce < newReduce)) {
// use autofit
result.autofit = true;
result.reduce = autofitReduce;
} else {
result.autofit = false;
result.reduce = newReduce;
}
}
return result;
}
// jumpToPage()
//______________________________________________________________________________
// Attempts to jump to page. Returns true if page could be found, false otherwise.
GnuBook.prototype.jumpToPage = function(pageNum) {
var pageIndex = this.getPageIndex(pageNum);
if ('undefined' != typeof(pageIndex)) {
var leafTop = 0;
var h;
this.jumpToIndex(pageIndex);
$('#GBcontainer').attr('scrollTop', leafTop);
return true;
}
// Page not found
return false;
}
// jumpToIndex()
//______________________________________________________________________________
GnuBook.prototype.jumpToIndex = function(index, pageX, pageY) {
if (2 == this.mode) {
this.autoStop();
// By checking against min/max we do nothing if requested index
// is current
if (index < Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
this.flipBackToIndex(index);
} else if (index > Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR)) {
this.flipFwdToIndex(index);
}
} else {
var i;
var leafTop = 0;
var leafLeft = 0;
var h;
for (i=0; i> 1;
//console.log( 'jumping to ' + leafTop + ' ' + offset);
leafTop += offset;
}
if (pageX) {
var offset = parseInt( (pageX) / this.reduce);
offset -= $('#GBcontainer').attr('clientWidth') >> 1;
leafLeft += offset;
}
//$('#GBcontainer').attr('scrollTop', leafTop);
$('#GBcontainer').animate({scrollTop: leafTop, scrollLeft: leafLeft },'fast');
}
}
// switchMode()
//______________________________________________________________________________
GnuBook.prototype.switchMode = function(mode) {
//console.log(' asked to switch to mode ' + mode + ' from ' + this.mode);
if (mode == this.mode) return;
if (!this.canSwitchToMode(mode)) {
return;
}
this.autoStop();
this.removeSearchHilites();
this.mode = mode;
this.switchToolbarMode(mode);
// $$$ TODO preserve center of view when switching between mode
// See https://bugs.edge.launchpad.net/gnubook/+bug/416682
if (1 == mode) {
this.reduce = this.quantizeReduce(this.reduce);
this.prepareOnePageView();
} else {
this.twoPage.autofit = false; // Take zoom level from other mode
this.reduce = this.quantizeReduce(this.reduce);
this.prepareTwoPageView();
this.twoPageCenterView(0.5, 0.5); // $$$ TODO preserve center
}
}
//prepareOnePageView()
//______________________________________________________________________________
GnuBook.prototype.prepareOnePageView = function() {
// var startLeaf = this.displayedIndices[0];
var startLeaf = this.currentIndex();
$('#GBcontainer').empty();
$('#GBcontainer').css({
overflowY: 'scroll',
overflowX: 'auto'
});
var gbPageView = $("#GBcontainer").append("");
this.resizePageView();
this.jumpToIndex(startLeaf);
this.displayedIndices = [];
this.drawLeafsOnePage();
// Bind mouse handlers
// Disable mouse click to avoid selected/highlighted page images - bug 354239
gbPageView.bind('mousedown', function(e) {
// $$$ check here for right-click and don't disable. Also use jQuery style
// for stopping propagation. See https://bugs.edge.launchpad.net/gnubook/+bug/362626
return false;
})
// Special hack for IE7
gbPageView[0].onselectstart = function(e) { return false; };
}
// prepareTwoPageView()
//______________________________________________________________________________
// Some decisions about two page view:
//
// Both pages will be displayed at the same height, even if they were different physical/scanned
// sizes. This simplifies the animation (from a design as well as technical standpoint). We
// examine the page aspect ratios (in calculateSpreadSize) and use the page with the most "normal"
// aspect ratio to determine the height.
//
// The two page view div is resized to keep the middle of the book in the middle of the div
// even as the page sizes change. To e.g. keep the middle of the book in the middle of the GBcontent
// div requires adjusting the offset of GBtwpageview and/or scrolling in GBcontent.
GnuBook.prototype.prepareTwoPageView = function(centerPercentageX, centerPercentageY) {
$('#GBcontainer').empty();
$('#GBcontainer').css('overflow', 'auto');
// We want to display two facing pages. We may be missing
// one side of the spread because it is the first/last leaf,
// foldouts, missing pages, etc
//var targetLeaf = this.displayedIndices[0];
var targetLeaf = this.firstIndex;
if (targetLeaf < this.firstDisplayableIndex()) {
targetLeaf = this.firstDisplayableIndex();
}
if (targetLeaf > this.lastDisplayableIndex()) {
targetLeaf = this.lastDisplayableIndex();
}
//this.twoPage.currentIndexL = null;
//this.twoPage.currentIndexR = null;
//this.pruneUnusedImgs();
var currentSpreadIndices = this.getSpreadIndices(targetLeaf);
this.twoPage.currentIndexL = currentSpreadIndices[0];
this.twoPage.currentIndexR = currentSpreadIndices[1];
this.firstIndex = this.twoPage.currentIndexL;
this.calculateSpreadSize(); //sets twoPage.width, twoPage.height and others
this.pruneUnusedImgs();
this.prefetch(); // Preload images or reload if scaling has changed
//console.dir(this.twoPage);
// Add the two page view
// $$$ Can we get everything set up and then append?
$('#GBcontainer').append('');
// $$$ calculate first then set
$('#GBtwopageview').css( {
height: this.twoPage.totalHeight + 'px',
width: this.twoPage.totalWidth + 'px',
position: 'absolute'
});
// If there will not be scrollbars (e.g. when zooming out) we center the book
// since otherwise the book will be stuck off-center
if (this.twoPage.totalWidth < $('#GBcontainer').attr('clientWidth')) {
centerPercentageX = 0.5;
}
if (this.twoPage.totalHeight < $('#GBcontainer').attr('clientHeight')) {
centerPercentageY = 0.5;
}
this.twoPageCenterView(centerPercentageX, centerPercentageY);
this.twoPage.coverDiv = document.createElement('div');
$(this.twoPage.coverDiv).attr('id', 'GBbookcover').css({
border: '1px solid rgb(68, 25, 17)',
width: this.twoPage.bookCoverDivWidth + 'px',
height: this.twoPage.bookCoverDivHeight+'px',
visibility: 'visible',
position: 'absolute',
backgroundColor: '#663929',
left: this.twoPage.bookCoverDivLeft + 'px',
top: this.twoPage.bookCoverDivTop+'px',
MozBorderRadiusTopleft: '7px',
MozBorderRadiusTopright: '7px',
MozBorderRadiusBottomright: '7px',
MozBorderRadiusBottomleft: '7px'
}).appendTo('#GBtwopageview');
this.leafEdgeR = document.createElement('div');
this.leafEdgeR.className = 'leafEdgeR'; // $$$ the static CSS should be moved into the .css file
$(this.leafEdgeR).css({
borderStyle: 'solid solid solid none',
borderColor: 'rgb(51, 51, 34)',
borderWidth: '1px 1px 1px 0px',
background: 'transparent url(' + this.imagesBaseURL + 'right_edges.png) repeat scroll 0% 0%',
width: this.twoPage.leafEdgeWidthR + 'px',
height: this.twoPage.height-1 + 'px',
/*right: '10px',*/
left: this.twoPage.gutter+this.twoPage.scaledWR+'px',
top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
position: 'absolute'
}).appendTo('#GBtwopageview');
this.leafEdgeL = document.createElement('div');
this.leafEdgeL.className = 'leafEdgeL';
$(this.leafEdgeL).css({ // $$$ static CSS should be moved to file
borderStyle: 'solid none solid solid',
borderColor: 'rgb(51, 51, 34)',
borderWidth: '1px 0px 1px 1px',
background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
width: this.twoPage.leafEdgeWidthL + 'px',
height: this.twoPage.height-1 + 'px',
left: this.twoPage.bookCoverDivLeft+this.twoPage.coverInternalPadding+'px',
top: this.twoPage.bookCoverDivTop+this.twoPage.coverInternalPadding+'px',
position: 'absolute'
}).appendTo('#GBtwopageview');
div = document.createElement('div');
$(div).attr('id', 'GBbookspine').css({
border: '1px solid rgb(68, 25, 17)',
width: this.twoPage.bookSpineDivWidth+'px',
height: this.twoPage.bookSpineDivHeight+'px',
position: 'absolute',
backgroundColor: 'rgb(68, 25, 17)',
left: this.twoPage.bookSpineDivLeft+'px',
top: this.twoPage.bookSpineDivTop+'px'
}).appendTo('#GBtwopageview');
var self = this; // for closure
/* Flip areas no longer used
this.twoPage.leftFlipArea = document.createElement('div');
this.twoPage.leftFlipArea.className = 'GBfliparea';
$(this.twoPage.leftFlipArea).attr('id', 'GBleftflip').css({
border: '0',
width: this.twoPageFlipAreaWidth() + 'px',
height: this.twoPageFlipAreaHeight() + 'px',
position: 'absolute',
left: this.twoPageLeftFlipAreaLeft() + 'px',
top: this.twoPageFlipAreaTop() + 'px',
cursor: 'w-resize',
zIndex: 100
}).bind('click', function(e) {
self.left();
}).bind('mousedown', function(e) {
e.preventDefault();
}).appendTo('#GBtwopageview');
this.twoPage.rightFlipArea = document.createElement('div');
this.twoPage.rightFlipArea.className = 'GBfliparea';
$(this.twoPage.rightFlipArea).attr('id', 'GBrightflip').css({
border: '0',
width: this.twoPageFlipAreaWidth() + 'px',
height: this.twoPageFlipAreaHeight() + 'px',
position: 'absolute',
left: this.twoPageRightFlipAreaLeft() + 'px',
top: this.twoPageFlipAreaTop() + 'px',
cursor: 'e-resize',
zIndex: 100
}).bind('click', function(e) {
self.right();
}).bind('mousedown', function(e) {
e.preventDefault();
}).appendTo('#GBtwopageview');
*/
this.prepareTwoPagePopUp();
this.displayedIndices = [];
//this.indicesToDisplay=[firstLeaf, firstLeaf+1];
//console.log('indicesToDisplay: ' + this.indicesToDisplay[0] + ' ' + this.indicesToDisplay[1]);
this.drawLeafsTwoPage();
this.updateToolbarZoom(this.reduce);
this.prefetch();
this.removeSearchHilites();
this.updateSearchHilites();
}
// prepareTwoPagePopUp()
//
// This function prepares the "View Page n" popup that shows while the mouse is
// over the left/right "stack of sheets" edges. It also binds the mouse
// events for these divs.
//______________________________________________________________________________
GnuBook.prototype.prepareTwoPagePopUp = function() {
this.twoPagePopUp = document.createElement('div');
$(this.twoPagePopUp).css({
border: '1px solid black',
padding: '2px 6px',
position: 'absolute',
fontFamily: 'sans-serif',
fontSize: '14px',
zIndex: '1000',
backgroundColor: 'rgb(255, 255, 238)',
opacity: 0.85
}).appendTo('#GBcontainer');
$(this.twoPagePopUp).hide();
$(this.leafEdgeL).add(this.leafEdgeR).bind('mouseenter', this, function(e) {
$(e.data.twoPagePopUp).show();
});
$(this.leafEdgeL).add(this.leafEdgeR).bind('mouseleave', this, function(e) {
$(e.data.twoPagePopUp).hide();
});
$(this.leafEdgeL).bind('click', this, function(e) {
e.data.autoStop();
var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
e.data.jumpToIndex(jumpIndex);
});
$(this.leafEdgeR).bind('click', this, function(e) {
e.data.autoStop();
var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
e.data.jumpToIndex(jumpIndex);
});
$(this.leafEdgeR).bind('mousemove', this, function(e) {
var jumpIndex = e.data.jumpIndexForRightEdgePageX(e.pageX);
$(e.data.twoPagePopUp).text('View ' + e.data.getPageName(jumpIndex));
// $$$ TODO: Make sure popup is positioned so that it is in view
// (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
$(e.data.twoPagePopUp).css({
left: e.pageX- $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() + 20 + 'px',
top: e.pageY - $('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
});
});
$(this.leafEdgeL).bind('mousemove', this, function(e) {
var jumpIndex = e.data.jumpIndexForLeftEdgePageX(e.pageX);
$(e.data.twoPagePopUp).text('View '+ e.data.getPageName(jumpIndex));
// $$$ TODO: Make sure popup is positioned so that it is in view
// (https://bugs.edge.launchpad.net/gnubook/+bug/327456)
$(e.data.twoPagePopUp).css({
left: e.pageX - $('#GBcontainer').offset().left + $('#GBcontainer').scrollLeft() - $(e.data.twoPagePopUp).width() - 25 + 'px',
top: e.pageY-$('#GBcontainer').offset().top + $('#GBcontainer').scrollTop() + 'px'
});
});
}
// calculateSpreadSize()
//______________________________________________________________________________
// Calculates 2-page spread dimensions based on this.twoPage.currentIndexL and
// this.twoPage.currentIndexR
// This function sets this.twoPage.height, twoPage.width
GnuBook.prototype.calculateSpreadSize = function() {
var firstIndex = this.twoPage.currentIndexL;
var secondIndex = this.twoPage.currentIndexR;
//console.log('first page is ' + firstIndex);
// Calculate page sizes and total leaf width
var spreadSize;
if ( this.twoPage.autofit) {
spreadSize = this.getIdealSpreadSize(firstIndex, secondIndex);
} else {
// set based on reduction factor
spreadSize = this.getSpreadSizeFromReduce(firstIndex, secondIndex, this.reduce);
}
// Both pages together
this.twoPage.height = spreadSize.height;
this.twoPage.width = spreadSize.width;
// Individual pages
this.twoPage.scaledWL = this.getPageWidth2UP(firstIndex);
this.twoPage.scaledWR = this.getPageWidth2UP(secondIndex);
// Leaf edges
this.twoPage.edgeWidth = spreadSize.totalLeafEdgeWidth; // The combined width of both edges
this.twoPage.leafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
this.twoPage.leafEdgeWidthR = this.twoPage.edgeWidth - this.twoPage.leafEdgeWidthL;
// Book cover
// The width of the book cover div. The combined width of both pages, twice the width
// of the book cover internal padding (2*10) and the page edges
this.twoPage.bookCoverDivWidth = this.twoPage.scaledWL + this.twoPage.scaledWR + 2 * this.twoPage.coverInternalPadding + this.twoPage.edgeWidth;
// The height of the book cover div
this.twoPage.bookCoverDivHeight = this.twoPage.height + 2 * this.twoPage.coverInternalPadding;
// We calculate the total width and height for the div so that we can make the book
// spine centered
var leftGutterOffset = this.gutterOffsetForIndex(firstIndex);
var leftWidthFromCenter = this.twoPage.scaledWL - leftGutterOffset + this.twoPage.leafEdgeWidthL;
var rightWidthFromCenter = this.twoPage.scaledWR + leftGutterOffset + this.twoPage.leafEdgeWidthR;
var largestWidthFromCenter = Math.max( leftWidthFromCenter, rightWidthFromCenter );
this.twoPage.totalWidth = 2 * (largestWidthFromCenter + this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
this.twoPage.totalHeight = this.twoPage.height + 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
// We want to minimize the unused space in two-up mode (maximize the amount of page
// shown). We give width to the leaf edges and these widths change (though the sum
// of the two remains constant) as we flip through the book. With the book
// cover centered and fixed in the GBcontainer div the page images will meet
// at the "gutter" which is generally offset from the center.
this.twoPage.middle = this.twoPage.totalWidth >> 1;
this.twoPage.gutter = this.twoPage.middle + this.gutterOffsetForIndex(firstIndex);
// The left edge of the book cover moves depending on the width of the pages
// $$$ change to getter
this.twoPage.bookCoverDivLeft = this.twoPage.gutter - this.twoPage.scaledWL - this.twoPage.leafEdgeWidthL - this.twoPage.coverInternalPadding;
// The top edge of the book cover stays a fixed distance from the top
this.twoPage.bookCoverDivTop = this.twoPage.coverExternalPadding;
// Book spine
this.twoPage.bookSpineDivHeight = this.twoPage.height + 2*this.twoPage.coverInternalPadding;
this.twoPage.bookSpineDivLeft = this.twoPage.middle - (this.twoPage.bookSpineDivWidth >> 1);
this.twoPage.bookSpineDivTop = this.twoPage.bookCoverDivTop;
this.reduce = spreadSize.reduce; // $$$ really set this here?
}
GnuBook.prototype.getIdealSpreadSize = function(firstIndex, secondIndex) {
var ideal = {};
// We check which page is closest to a "normal" page and use that to set the height
// for both pages. This means that foldouts and other odd size pages will be displayed
// smaller than the nominal zoom amount.
var canon5Dratio = 1.5;
var first = {
height: this._getPageHeight(firstIndex),
width: this._getPageWidth(firstIndex)
}
var second = {
height: this._getPageHeight(secondIndex),
width: this._getPageWidth(secondIndex)
}
var firstIndexRatio = first.height / first.width;
var secondIndexRatio = second.height / second.width;
//console.log('firstIndexRatio = ' + firstIndexRatio + ' secondIndexRatio = ' + secondIndexRatio);
var ratio;
if (Math.abs(firstIndexRatio - canon5Dratio) < Math.abs(secondIndexRatio - canon5Dratio)) {
ratio = firstIndexRatio;
//console.log('using firstIndexRatio ' + ratio);
} else {
ratio = secondIndexRatio;
//console.log('using secondIndexRatio ' + ratio);
}
var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1);
ideal.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
var widthOutsidePages = 2 * (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding) + ideal.totalLeafEdgeWidth;
var heightOutsidePages = 2* (this.twoPage.coverInternalPadding + this.twoPage.coverExternalPadding);
ideal.width = ($('#GBcontainer').width() - widthOutsidePages) >> 1;
ideal.width -= 10; // $$$ fudge factor
ideal.height = $('#GBcontainer').height() - heightOutsidePages;
ideal.height -= 20; // fudge factor
//console.log('init idealWidth='+ideal.width+' idealHeight='+ideal.height + ' ratio='+ratio);
if (ideal.height/ratio <= ideal.width) {
//use height
ideal.width = parseInt(ideal.height/ratio);
} else {
//use width
ideal.height = parseInt(ideal.width*ratio);
}
// $$$ check this logic with large spreads
ideal.reduce = ((first.height + second.height) / 2) / ideal.height;
return ideal;
}
// getSpreadSizeFromReduce()
//______________________________________________________________________________
// Returns the spread size calculated from the reduction factor for the given pages
GnuBook.prototype.getSpreadSizeFromReduce = function(firstIndex, secondIndex, reduce) {
var spreadSize = {};
// $$$ Scale this based on reduce?
var totalLeafEdgeWidth = parseInt(this.numLeafs * 0.1);
var maxLeafEdgeWidth = parseInt($('#GBcontainer').attr('clientWidth') * 0.1); // $$$ Assumes leaf edge width constant at all zoom levels
spreadSize.totalLeafEdgeWidth = Math.min(totalLeafEdgeWidth, maxLeafEdgeWidth);
// $$$ Possibly incorrect -- we should make height "dominant"
var nativeWidth = this._getPageWidth(firstIndex) + this._getPageWidth(secondIndex);
var nativeHeight = this._getPageHeight(firstIndex) + this._getPageHeight(secondIndex);
spreadSize.height = parseInt( (nativeHeight / 2) / this.reduce );
spreadSize.width = parseInt( (nativeWidth / 2) / this.reduce );
spreadSize.reduce = reduce;
return spreadSize;
}
// twoPageGetAutofitReduce()
//______________________________________________________________________________
// Returns the current ideal reduction factor
GnuBook.prototype.twoPageGetAutofitReduce = function() {
var spreadSize = this.getIdealSpreadSize(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
return spreadSize.reduce;
}
// twoPageSetCursor()
//______________________________________________________________________________
// Set the cursor for two page view
GnuBook.prototype.twoPageSetCursor = function() {
// console.log('setting cursor');
if ( ($('#GBtwopageview').width() > $('#GBcontainer').attr('clientWidth')) ||
($('#GBtwopageview').height() > $('#GBcontainer').attr('clientHeight')) ) {
$(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','move');
$(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','move');
} else {
$(this.prefetchedImgs[this.twoPage.currentIndexL]).css('cursor','');
$(this.prefetchedImgs[this.twoPage.currentIndexR]).css('cursor','');
}
}
// currentIndex()
//______________________________________________________________________________
// Returns the currently active index.
GnuBook.prototype.currentIndex = function() {
// $$$ we should be cleaner with our idea of which index is active in 1up/2up
if (this.mode == this.constMode1up) {
return this.firstIndex; // $$$ TODO page in center of view would be better
} else if (this.mode == this.constMode2up) {
// Only allow indices that are actually present in book
return GnuBook.util.clamp(this.firstIndex, 0, this.numLeafs - 1);
} else {
throw 'currentIndex called for unimplemented mode ' + this.mode;
}
}
// right()
//______________________________________________________________________________
// Flip the right page over onto the left
GnuBook.prototype.right = function() {
if ('rl' != this.pageProgression) {
// LTR
gb.next();
} else {
// RTL
gb.prev();
}
}
// rightmost()
//______________________________________________________________________________
// Flip to the rightmost page
GnuBook.prototype.rightmost = function() {
if ('rl' != this.pageProgression) {
gb.last();
} else {
gb.first();
}
}
// left()
//______________________________________________________________________________
// Flip the left page over onto the right.
GnuBook.prototype.left = function() {
if ('rl' != this.pageProgression) {
// LTR
gb.prev();
} else {
// RTL
gb.next();
}
}
// leftmost()
//______________________________________________________________________________
// Flip to the leftmost page
GnuBook.prototype.leftmost = function() {
if ('rl' != this.pageProgression) {
gb.first();
} else {
gb.last();
}
}
// next()
//______________________________________________________________________________
GnuBook.prototype.next = function() {
if (2 == this.mode) {
this.autoStop();
this.flipFwdToIndex(null);
} else {
if (this.firstIndex < this.lastDisplayableIndex()) {
this.jumpToIndex(this.firstIndex+1);
}
}
}
// prev()
//______________________________________________________________________________
GnuBook.prototype.prev = function() {
if (2 == this.mode) {
this.autoStop();
this.flipBackToIndex(null);
} else {
if (this.firstIndex >= 1) {
this.jumpToIndex(this.firstIndex-1);
}
}
}
GnuBook.prototype.first = function() {
this.jumpToIndex(this.firstDisplayableIndex());
}
GnuBook.prototype.last = function() {
this.jumpToIndex(this.lastDisplayableIndex());
}
// flipBackToIndex()
//______________________________________________________________________________
// to flip back one spread, pass index=null
GnuBook.prototype.flipBackToIndex = function(index) {
if (1 == this.mode) return;
var leftIndex = this.twoPage.currentIndexL;
if (this.animating) return;
if (null != this.leafEdgeTmp) {
alert('error: leafEdgeTmp should be null!');
return;
}
if (null == index) {
index = leftIndex-2;
}
//if (index<0) return;
var previousIndices = this.getSpreadIndices(index);
if (previousIndices[0] < this.firstDisplayableIndex() || previousIndices[1] < this.firstDisplayableIndex()) {
return;
}
this.animating = true;
if ('rl' != this.pageProgression) {
// Assume LTR and we are going backward
this.prepareFlipLeftToRight(previousIndices[0], previousIndices[1]);
this.flipLeftToRight(previousIndices[0], previousIndices[1]);
} else {
// RTL and going backward
var gutter = this.prepareFlipRightToLeft(previousIndices[0], previousIndices[1]);
this.flipRightToLeft(previousIndices[0], previousIndices[1], gutter);
}
}
// flipLeftToRight()
//______________________________________________________________________________
// Flips the page on the left towards the page on the right
GnuBook.prototype.flipLeftToRight = function(newIndexL, newIndexR) {
var leftLeaf = this.twoPage.currentIndexL;
var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
var leafEdgeTmpW = oldLeafEdgeWidthL - newLeafEdgeWidthL;
var currWidthL = this.getPageWidth2UP(leftLeaf);
var newWidthL = this.getPageWidth2UP(newIndexL);
var newWidthR = this.getPageWidth2UP(newIndexR);
var top = this.twoPageTop();
var gutter = this.twoPage.middle + this.gutterOffsetForIndex(newIndexL);
//console.log('leftEdgeTmpW ' + leafEdgeTmpW);
//console.log(' gutter ' + gutter + ', scaledWL ' + scaledWL + ', newLeafEdgeWL ' + newLeafEdgeWidthL);
//animation strategy:
// 0. remove search highlight, if any.
// 1. create a new div, called leafEdgeTmp to represent the leaf edge between the leftmost edge
// of the left leaf and where the user clicked in the leaf edge.
// Note that if this function was triggered by left() and not a
// mouse click, the width of leafEdgeTmp is very small (zero px).
// 2. animate both leafEdgeTmp to the gutter (without changing its width) and animate
// leftLeaf to width=0.
// 3. When step 2 is finished, animate leafEdgeTmp to right-hand side of new right leaf
// (left=gutter+newWidthR) while also animating the new right leaf from width=0 to
// its new full width.
// 4. After step 3 is finished, do the following:
// - remove leafEdgeTmp from the dom.
// - resize and move the right leaf edge (leafEdgeR) to left=gutter+newWidthR
// and width=twoPage.edgeWidth-newLeafEdgeWidthL.
// - resize and move the left leaf edge (leafEdgeL) to left=gutter-newWidthL-newLeafEdgeWidthL
// and width=newLeafEdgeWidthL.
// - resize the back cover (twoPage.coverDiv) to left=gutter-newWidthL-newLeafEdgeWidthL-10
// and width=newWidthL+newWidthR+twoPage.edgeWidth+20
// - move new left leaf (newIndexL) forward to zindex=2 so it can receive clicks.
// - remove old left and right leafs from the dom [pruneUnusedImgs()].
// - prefetch new adjacent leafs.
// - set up click handlers for both new left and right leafs.
// - redraw the search highlight.
// - update the pagenum box and the url.
var leftEdgeTmpLeft = gutter - currWidthL - leafEdgeTmpW;
this.leafEdgeTmp = document.createElement('div');
$(this.leafEdgeTmp).css({
borderStyle: 'solid none solid solid',
borderColor: 'rgb(51, 51, 34)',
borderWidth: '1px 0px 1px 1px',
background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
width: leafEdgeTmpW + 'px',
height: this.twoPage.height-1 + 'px',
left: leftEdgeTmpLeft + 'px',
top: top+'px',
position: 'absolute',
zIndex:1000
}).appendTo('#GBtwopageview');
//$(this.leafEdgeL).css('width', newLeafEdgeWidthL+'px');
$(this.leafEdgeL).css({
width: newLeafEdgeWidthL+'px',
left: gutter-currWidthL-newLeafEdgeWidthL+'px'
});
// Left gets the offset of the current left leaf from the document
var left = $(this.prefetchedImgs[leftLeaf]).offset().left;
// $$$ This seems very similar to the gutter. May be able to consolidate the logic.
var right = $('#GBtwopageview').attr('clientWidth')-left-$(this.prefetchedImgs[leftLeaf]).width()+$('#GBtwopageview').offset().left-2+'px';
// We change the left leaf to right positioning
// $$$ This causes animation glitches during resize. See https://bugs.edge.launchpad.net/gnubook/+bug/328327
$(this.prefetchedImgs[leftLeaf]).css({
right: right,
left: ''
});
$(this.leafEdgeTmp).animate({left: gutter}, this.flipSpeed, 'easeInSine');
//$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, 'slow', 'easeInSine');
var self = this;
this.removeSearchHilites();
//console.log('animating leafLeaf ' + leftLeaf + ' to 0px');
$(this.prefetchedImgs[leftLeaf]).animate({width: '0px'}, self.flipSpeed, 'easeInSine', function() {
//console.log(' and now leafEdgeTmp to left: gutter+newWidthR ' + (gutter + newWidthR));
$(self.leafEdgeTmp).animate({left: gutter+newWidthR+'px'}, self.flipSpeed, 'easeOutSine');
//console.log(' animating newIndexR ' + newIndexR + ' to ' + newWidthR + ' from ' + $(self.prefetchedImgs[newIndexR]).width());
$(self.prefetchedImgs[newIndexR]).animate({width: newWidthR+'px'}, self.flipSpeed, 'easeOutSine', function() {
$(self.prefetchedImgs[newIndexL]).css('zIndex', 2);
$(self.leafEdgeR).css({
// Moves the right leaf edge
width: self.twoPage.edgeWidth-newLeafEdgeWidthL+'px',
left: gutter+newWidthR+'px'
});
$(self.leafEdgeL).css({
// Moves and resizes the left leaf edge
width: newLeafEdgeWidthL+'px',
left: gutter-newWidthL-newLeafEdgeWidthL+'px'
});
// Resizes the brown border div
$(self.twoPage.coverDiv).css({
width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
left: gutter-newWidthL-newLeafEdgeWidthL-self.twoPage.coverInternalPadding+'px'
});
$(self.leafEdgeTmp).remove();
self.leafEdgeTmp = null;
// $$$ TODO refactor with opposite direction flip
self.twoPage.currentIndexL = newIndexL;
self.twoPage.currentIndexR = newIndexR;
self.twoPage.scaledWL = newWidthL;
self.twoPage.scaledWR = newWidthR;
self.twoPage.gutter = gutter;
self.firstIndex = self.twoPage.currentIndexL;
self.displayedIndices = [newIndexL, newIndexR];
self.pruneUnusedImgs();
self.prefetch();
self.animating = false;
self.updateSearchHilites2UP();
self.updatePageNumBox2UP();
// self.twoPagePlaceFlipAreas(); // No longer used
self.setMouseHandlers2UP();
self.twoPageSetCursor();
if (self.animationFinishedCallback) {
self.animationFinishedCallback();
self.animationFinishedCallback = null;
}
});
});
}
// flipFwdToIndex()
//______________________________________________________________________________
// Whether we flip left or right is dependent on the page progression
// to flip forward one spread, pass index=null
GnuBook.prototype.flipFwdToIndex = function(index) {
if (this.animating) return;
if (null != this.leafEdgeTmp) {
alert('error: leafEdgeTmp should be null!');
return;
}
if (null == index) {
index = this.twoPage.currentIndexR+2; // $$$ assumes indices are continuous
}
if (index > this.lastDisplayableIndex()) return;
this.animating = true;
var nextIndices = this.getSpreadIndices(index);
//console.log('flipfwd to indices ' + nextIndices[0] + ',' + nextIndices[1]);
if ('rl' != this.pageProgression) {
// We did not specify RTL
var gutter = this.prepareFlipRightToLeft(nextIndices[0], nextIndices[1]);
this.flipRightToLeft(nextIndices[0], nextIndices[1], gutter);
} else {
// RTL
var gutter = this.prepareFlipLeftToRight(nextIndices[0], nextIndices[1]);
this.flipLeftToRight(nextIndices[0], nextIndices[1]);
}
}
// flipRightToLeft(nextL, nextR, gutter)
// $$$ better not to have to pass gutter in
//______________________________________________________________________________
// Flip from left to right and show the nextL and nextR indices on those sides
GnuBook.prototype.flipRightToLeft = function(newIndexL, newIndexR) {
var oldLeafEdgeWidthL = this.leafEdgeWidth(this.twoPage.currentIndexL);
var oldLeafEdgeWidthR = this.twoPage.edgeWidth-oldLeafEdgeWidthL;
var newLeafEdgeWidthL = this.leafEdgeWidth(newIndexL);
var newLeafEdgeWidthR = this.twoPage.edgeWidth-newLeafEdgeWidthL;
var leafEdgeTmpW = oldLeafEdgeWidthR - newLeafEdgeWidthR;
var top = this.twoPageTop();
var scaledW = this.getPageWidth2UP(this.twoPage.currentIndexR);
var middle = this.twoPage.middle;
var gutter = middle + this.gutterOffsetForIndex(newIndexL);
this.leafEdgeTmp = document.createElement('div');
$(this.leafEdgeTmp).css({
borderStyle: 'solid none solid solid',
borderColor: 'rgb(51, 51, 34)',
borderWidth: '1px 0px 1px 1px',
background: 'transparent url(' + this.imagesBaseURL + 'left_edges.png) repeat scroll 0% 0%',
width: leafEdgeTmpW + 'px',
height: this.twoPage.height-1 + 'px',
left: gutter+scaledW+'px',
top: top+'px',
position: 'absolute',
zIndex:1000
}).appendTo('#GBtwopageview');
//var scaledWR = this.getPageWidth2UP(newIndexR); // $$$ should be current instead?
//var scaledWL = this.getPageWidth2UP(newIndexL); // $$$ should be current instead?
var currWidthL = this.getPageWidth2UP(this.twoPage.currentIndexL);
var currWidthR = this.getPageWidth2UP(this.twoPage.currentIndexR);
var newWidthL = this.getPageWidth2UP(newIndexL);
var newWidthR = this.getPageWidth2UP(newIndexR);
$(this.leafEdgeR).css({width: newLeafEdgeWidthR+'px', left: gutter+newWidthR+'px' });
var self = this; // closure-tastic!
var speed = this.flipSpeed;
this.removeSearchHilites();
$(this.leafEdgeTmp).animate({left: gutter}, speed, 'easeInSine');
$(this.prefetchedImgs[this.twoPage.currentIndexR]).animate({width: '0px'}, speed, 'easeInSine', function() {
$(self.leafEdgeTmp).animate({left: gutter-newWidthL-leafEdgeTmpW+'px'}, speed, 'easeOutSine');
$(self.prefetchedImgs[newIndexL]).animate({width: newWidthL+'px'}, speed, 'easeOutSine', function() {
$(self.prefetchedImgs[newIndexR]).css('zIndex', 2);
$(self.leafEdgeL).css({
width: newLeafEdgeWidthL+'px',
left: gutter-newWidthL-newLeafEdgeWidthL+'px'
});
// Resizes the book cover
$(self.twoPage.coverDiv).css({
width: self.twoPageCoverWidth(newWidthL+newWidthR)+'px',
left: gutter - newWidthL - newLeafEdgeWidthL - self.twoPage.coverInternalPadding + 'px'
});
$(self.leafEdgeTmp).remove();
self.leafEdgeTmp = null;
self.twoPage.currentIndexL = newIndexL;
self.twoPage.currentIndexR = newIndexR;
self.twoPage.scaledWL = newWidthL;
self.twoPage.scaledWR = newWidthR;
self.twoPage.gutter = gutter;
self.firstIndex = self.twoPage.currentIndexL;
self.displayedIndices = [newIndexL, newIndexR];
self.pruneUnusedImgs();
self.prefetch();
self.animating = false;
self.updateSearchHilites2UP();
self.updatePageNumBox2UP();
// self.twoPagePlaceFlipAreas(); // No longer used
self.setMouseHandlers2UP();
self.twoPageSetCursor();
if (self.animationFinishedCallback) {
self.animationFinishedCallback();
self.animationFinishedCallback = null;
}
});
});
}
// setMouseHandlers2UP
//______________________________________________________________________________
GnuBook.prototype.setMouseHandlers2UP = function() {
/*
$(this.prefetchedImgs[this.twoPage.currentIndexL]).bind('dblclick', function() {
//self.prevPage();
self.autoStop();
self.left();
});
$(this.prefetchedImgs[this.twoPage.currentIndexR]).bind('dblclick', function() {
//self.nextPage();'
self.autoStop();
self.right();
});
*/
this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL] );
this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexL],
{ self: this },
function(e) {
e.data.self.left();
}
);
this.setDragHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR] );
this.setClickHandler2UP( this.prefetchedImgs[this.twoPage.currentIndexR],
{ self: this },
function(e) {
e.data.self.right();
}
);
}
// prefetchImg()
//______________________________________________________________________________
GnuBook.prototype.prefetchImg = function(index) {
var pageURI = this._getPageURI(index);
// Load image if not loaded or URI has changed (e.g. due to scaling)
var loadImage = false;
if (undefined == this.prefetchedImgs[index]) {
//console.log('no image for ' + index);
loadImage = true;
} else if (pageURI != this.prefetchedImgs[index].uri) {
//console.log('uri changed for ' + index);
loadImage = true;
}
if (loadImage) {
//console.log('prefetching ' + index);
var img = document.createElement("img");
img.src = pageURI;
img.uri = pageURI; // browser may rewrite src so we stash raw URI here
this.prefetchedImgs[index] = img;
}
}
// prepareFlipLeftToRight()
//
//______________________________________________________________________________
//
// Prepare to flip the left page towards the right. This corresponds to moving
// backward when the page progression is left to right.
GnuBook.prototype.prepareFlipLeftToRight = function(prevL, prevR) {
//console.log(' preparing left->right for ' + prevL + ',' + prevR);
this.prefetchImg(prevL);
this.prefetchImg(prevR);
var height = this._getPageHeight(prevL);
var width = this._getPageWidth(prevL);
var middle = this.twoPage.middle;
var top = this.twoPageTop();
var scaledW = this.twoPage.height*width/height; // $$$ assumes height of page is dominant
// The gutter is the dividing line between the left and right pages.
// It is offset from the middle to create the illusion of thickness to the pages
var gutter = middle + this.gutterOffsetForIndex(prevL);
//console.log(' gutter for ' + prevL + ' is ' + gutter);
//console.log(' prevL.left: ' + (gutter - scaledW) + 'px');
//console.log(' changing prevL ' + prevL + ' to left: ' + (gutter-scaledW) + ' width: ' + scaledW);
leftCSS = {
position: 'absolute',
left: gutter-scaledW+'px',
right: '', // clear right property
top: top+'px',
height: this.twoPage.height,
width: scaledW+'px',
backgroundColor: this.getPageBackgroundColor(prevL),
borderRight: '1px solid black',
zIndex: 1
}
$(this.prefetchedImgs[prevL]).css(leftCSS);
$('#GBtwopageview').append(this.prefetchedImgs[prevL]);
//console.log(' changing prevR ' + prevR + ' to left: ' + gutter + ' width: 0');
rightCSS = {
position: 'absolute',
left: gutter+'px',
right: '',
top: top+'px',
height: this.twoPage.height,
width: '0px',
backgroundColor: this.getPageBackgroundColor(prevR),
borderLeft: '1px solid black',
zIndex: 2
}
$(this.prefetchedImgs[prevR]).css(rightCSS);
$('#GBtwopageview').append(this.prefetchedImgs[prevR]);
}
// $$$ mang we're adding an extra pixel in the middle. See https://bugs.edge.launchpad.net/gnubook/+bug/411667
// prepareFlipRightToLeft()
//______________________________________________________________________________
GnuBook.prototype.prepareFlipRightToLeft = function(nextL, nextR) {
//console.log(' preparing left<-right for ' + nextL + ',' + nextR);
// Prefetch images
this.prefetchImg(nextL);
this.prefetchImg(nextR);
var height = this._getPageHeight(nextR);
var width = this._getPageWidth(nextR);
var middle = this.twoPage.middle;
var top = this.twoPageTop();
var scaledW = this.twoPage.height*width/height;
var gutter = middle + this.gutterOffsetForIndex(nextL);
//console.log(' prepareRTL changing nextR ' + nextR + ' to left: ' + gutter);
$(this.prefetchedImgs[nextR]).css({
position: 'absolute',
left: gutter+'px',
top: top+'px',
backgroundColor: this.getPageBackgroundColor(nextR),
height: this.twoPage.height,
width: scaledW+'px',
borderLeft: '1px solid black',
zIndex: 1
});
$('#GBtwopageview').append(this.prefetchedImgs[nextR]);
height = this._getPageHeight(nextL);
width = this._getPageWidth(nextL);
scaledW = this.twoPage.height*width/height;
//console.log(' prepareRTL changing nextL ' + nextL + ' to right: ' + $('#GBcontainer').width()-gutter);
$(this.prefetchedImgs[nextL]).css({
position: 'absolute',
right: $('#GBtwopageview').attr('clientWidth')-gutter+'px',
top: top+'px',
backgroundColor: this.getPageBackgroundColor(nextL),
height: this.twoPage.height,
width: 0+'px', // Start at 0 width, then grow to the left
borderRight: '1px solid black',
zIndex: 2
});
$('#GBtwopageview').append(this.prefetchedImgs[nextL]);
}
// getNextLeafs() -- NOT RTL AWARE
//______________________________________________________________________________
// GnuBook.prototype.getNextLeafs = function(o) {
// //TODO: we might have two left or two right leafs in a row (damaged book)
// //For now, assume that leafs are contiguous.
//
// //return [this.twoPage.currentIndexL+2, this.twoPage.currentIndexL+3];
// o.L = this.twoPage.currentIndexL+2;
// o.R = this.twoPage.currentIndexL+3;
// }
// getprevLeafs() -- NOT RTL AWARE
//______________________________________________________________________________
// GnuBook.prototype.getPrevLeafs = function(o) {
// //TODO: we might have two left or two right leafs in a row (damaged book)
// //For now, assume that leafs are contiguous.
//
// //return [this.twoPage.currentIndexL-2, this.twoPage.currentIndexL-1];
// o.L = this.twoPage.currentIndexL-2;
// o.R = this.twoPage.currentIndexL-1;
// }
// pruneUnusedImgs()
//______________________________________________________________________________
GnuBook.prototype.pruneUnusedImgs = function() {
//console.log('current: ' + this.twoPage.currentIndexL + ' ' + this.twoPage.currentIndexR);
for (var key in this.prefetchedImgs) {
//console.log('key is ' + key);
if ((key != this.twoPage.currentIndexL) && (key != this.twoPage.currentIndexR)) {
//console.log('removing key '+ key);
$(this.prefetchedImgs[key]).remove();
}
if ((key < this.twoPage.currentIndexL-4) || (key > this.twoPage.currentIndexR+4)) {
//console.log('deleting key '+ key);
delete this.prefetchedImgs[key];
}
}
}
// prefetch()
//______________________________________________________________________________
GnuBook.prototype.prefetch = function() {
// prefetch visible pages first
this.prefetchImg(this.twoPage.currentIndexL);
this.prefetchImg(this.twoPage.currentIndexR);
var adjacentPagesToLoad = 3;
var lowCurrent = Math.min(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
var highCurrent = Math.max(this.twoPage.currentIndexL, this.twoPage.currentIndexR);
var start = Math.max(lowCurrent - adjacentPagesToLoad, 0);
var end = Math.min(highCurrent + adjacentPagesToLoad, this.numLeafs - 1);
// Load images spreading out from current
for (var i = 1; i <= adjacentPagesToLoad; i++) {
var goingDown = lowCurrent - i;
if (goingDown >= start) {
this.prefetchImg(goingDown);
}
var goingUp = highCurrent + i;
if (goingUp <= end) {
this.prefetchImg(goingUp);
}
}
/*
var lim = this.twoPage.currentIndexL-4;
var i;
lim = Math.max(lim, 0);
for (i = lim; i < this.twoPage.currentIndexL; i++) {
this.prefetchImg(i);
}
if (this.numLeafs > (this.twoPage.currentIndexR+1)) {
lim = Math.min(this.twoPage.currentIndexR+4, this.numLeafs-1);
for (i=this.twoPage.currentIndexR+1; i<=lim; i++) {
this.prefetchImg(i);
}
}
*/
}
// getPageWidth2UP()
//______________________________________________________________________________
GnuBook.prototype.getPageWidth2UP = function(index) {
// We return the width based on the dominant height
var height = this._getPageHeight(index);
var width = this._getPageWidth(index);
return Math.floor(this.twoPage.height*width/height); // $$$ we assume width is relative to current spread
}
// search()
//______________________________________________________________________________
GnuBook.prototype.search = function(term) {
term = term.replace(/\//g, ' '); // strip slashes
this.searchTerm = term;
$('#GnuBookSearchScript').remove();
var script = document.createElement("script");
script.setAttribute('id', 'GnuBookSearchScript');
script.setAttribute("type", "text/javascript");
script.setAttribute("src", 'http://'+this.server+'/GnuBook/flipbook_search_gb.php?url='+escape(this.bookPath + '_djvu.xml')+'&term='+term+'&format=XML&callback=gb.GBSearchCallback');
document.getElementsByTagName('head')[0].appendChild(script);
$('#GnuBookSearchBox').val(term);
$('#GnuBookSearchResults').html('Searching...');
}
// GBSearchCallback()
//______________________________________________________________________________
GnuBook.prototype.GBSearchCallback = function(txt) {
//alert(txt);
if (jQuery.browser.msie) {
var dom=new ActiveXObject("Microsoft.XMLDOM");
dom.async="false";
dom.loadXML(txt);
} else {
var parser = new DOMParser();
var dom = parser.parseFromString(txt, "text/xml");
}
$('#GnuBookSearchResults').empty();
$('#GnuBookSearchResults').append('
');
for (var key in this.searchResults) {
if (null != this.searchResults[key].div) {
$(this.searchResults[key].div).remove();
}
delete this.searchResults[key];
}
var pages = dom.getElementsByTagName('PAGE');
if (0 == pages.length) {
// $$$ it would be nice to echo the (sanitized) search result here
$('#GnuBookSearchResults').append('
No search results found
');
} else {
for (var i = 0; i < pages.length; i++){
//console.log(pages[i].getAttribute('file').substr(1) +'-'+ parseInt(pages[i].getAttribute('file').substr(1), 10));
var re = new RegExp (/_(\d{4})/);
var reMatch = re.exec(pages[i].getAttribute('file'));
var index = parseInt(reMatch[1], 10);
//var index = parseInt(pages[i].getAttribute('file').substr(1), 10);
var children = pages[i].childNodes;
var context = '';
for (var j=0; j';
var index = this.leafNumToIndex(index);
if (null != index) {
//coordinates are [left, bottom, right, top, [baseline]]
//we'll skip baseline for now...
var coords = children[j].getAttribute('coords').split(',',4);
if (4 == coords.length) {
this.searchResults[index] = {'l':parseInt(coords[0]), 'b':parseInt(coords[1]), 'r':parseInt(coords[2]), 't':parseInt(coords[3]), 'div':null};
}
}
}
}
var pageName = this.getPageName(index);
var middleX = (this.searchResults[index].l + this.searchResults[index].r) >> 1;
var middleY = (this.searchResults[index].t + this.searchResults[index].b) >> 1;
//TODO: remove hardcoded instance name
$('#GnuBookSearchResults').append('
';
this.printPopup.innerHTML = htmlStr;
var iframe = document.createElement('iframe');
iframe.id = 'printFrame';
iframe.name = 'printFrame';
iframe.width = '233px'; // 8.5 x 11 aspect
iframe.height = '300px';
var self = this; // closure
$(iframe).load(function() {
var doc = GnuBook.util.getIFrameDocument(this);
$('body', doc).html(self.getPrintFrameContent(self.indexToPrint));
});
$('#printDiv').prepend(iframe);
*/
}
// Get print URI from current indices and mode
GnuBook.prototype.getPrintURI = function() {
var indexToPrint;
if (this.constMode2up == this.mode) {
indexToPrint = this.twoPage.currentIndexL;
} else {
indexToPrint = this.firstIndex; // $$$ the index in the middle of the viewport would make more sense
}
var options = 'id=' + this.bookId + '&server=' + this.server + '&zip=' + this.zip
+ '&format=' + this.imageFormat + '&file=' + this._getPageFile(indexToPrint)
+ '&width=' + this._getPageWidth(indexToPrint) + '&height=' + this._getPageHeight(indexToPrint);
if (this.constMode2up == this.mode) {
options += '&file2=' + this._getPageFile(this.twoPage.currentIndexR) + '&width2=' + this._getPageWidth(this.twoPage.currentIndexR);
options += '&height2=' + this._getPageHeight(this.twoPage.currentIndexR);
options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Pages ' + this.getPageNum(this.twoPage.currentIndexL) + ', ' + this.getPageNum(this.twoPage.currentIndexR));
} else {
options += '&title=' + encodeURIComponent(this.shortTitle(50) + ' - Page ' + this.getPageNum(indexToPrint));
}
return '/bookreader/print.php?' + options;
}
/* iframe implementation
GnuBook.prototype.getPrintFrameContent = function(index) {
// We fit the image based on an assumed A4 aspect ratio. A4 is a bit taller aspect than
// 8.5x11 so we should end up not overflowing on either paper size.
var paperAspect = 8.5 / 11;
var imageAspect = this._getPageWidth(index) / this._getPageHeight(index);
var rotate = 0;
// Rotate if possible and appropriate, to get larger image size on printed page
if (this.canRotatePage(index)) {
if (imageAspect > 1 && imageAspect > paperAspect) {
// more wide than square, and more wide than paper
rotate = 90;
imageAspect = 1/imageAspect;
}
}
var fitAttrs;
if (imageAspect > paperAspect) {
// wider than paper, fit width
fitAttrs = 'width="95%"';
} else {
// taller than paper, fit height
fitAttrs = 'height="95%"';
}
var imageURL = this._getPageURI(index, 1, rotate);
var iframeStr = '' + this.bookTitle + '';
iframeStr += '
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.
';
this.embedPopup.innerHTML = htmlStr;
$(this.embedPopup).find('input').bind('click', function() {
this.select();
})
}
// autoToggle()
//______________________________________________________________________________
GnuBook.prototype.autoToggle = function() {
var bComingFrom1up = false;
if (2 != this.mode) {
bComingFrom1up = true;
this.switchMode(2);
}
// Change to autofit if book is too large
if (this.reduce < this.twoPageGetAutofitReduce()) {
this.zoom2up(0);
}
var self = this;
if (null == this.autoTimer) {
this.flipSpeed = 2000;
// $$$ Draw events currently cause layout problems when they occur during animation.
// There is a specific problem when changing from 1-up immediately to autoplay in RTL so
// we workaround for now by not triggering immediate animation in that case.
// See https://bugs.launchpad.net/gnubook/+bug/328327
if (('rl' == this.pageProgression) && bComingFrom1up) {
// don't flip immediately -- wait until timer fires
} else {
// flip immediately
this.flipFwdToIndex();
}
$('#GBtoolbar .play').hide();
$('#GBtoolbar .pause').show();
this.autoTimer=setInterval(function(){
if (self.animating) {return;}
if (Math.max(self.twoPage.currentIndexL, self.twoPage.currentIndexR) >= self.lastDisplayableIndex()) {
self.flipBackToIndex(1); // $$$ really what we want?
} else {
self.flipFwdToIndex();
}
},5000);
} else {
this.autoStop();
}
}
// autoStop()
//______________________________________________________________________________
// Stop autoplay mode, allowing animations to finish
GnuBook.prototype.autoStop = function() {
if (null != this.autoTimer) {
clearInterval(this.autoTimer);
this.flipSpeed = 'fast';
$('#GBtoolbar .pause').hide();
$('#GBtoolbar .play').show();
this.autoTimer = null;
}
}
// stopFlipAnimations
//______________________________________________________________________________
// Immediately stop flip animations. Callbacks are triggered.
GnuBook.prototype.stopFlipAnimations = function() {
this.autoStop(); // Clear timers
// Stop animation, clear queue, trigger callbacks
if (this.leafEdgeTmp) {
$(this.leafEdgeTmp).stop(false, true);
}
jQuery.each(this.prefetchedImgs, function() {
$(this).stop(false, true);
});
// And again since animations also queued in callbacks
if (this.leafEdgeTmp) {
$(this.leafEdgeTmp).stop(false, true);
}
jQuery.each(this.prefetchedImgs, function() {
$(this).stop(false, true);
});
}
// keyboardNavigationIsDisabled(event)
// - returns true if keyboard navigation should be disabled for the event
//______________________________________________________________________________
GnuBook.prototype.keyboardNavigationIsDisabled = function(event) {
if (event.target.tagName == "INPUT") {
return true;
}
return false;
}
// gutterOffsetForIndex
//______________________________________________________________________________
//
// Returns the gutter offset for the spread containing the given index.
// This function supports RTL
GnuBook.prototype.gutterOffsetForIndex = function(pindex) {
// To find the offset of the gutter from the middle we calculate our percentage distance
// through the book (0..1), remap to (-0.5..0.5) and multiply by the total page edge width
var offset = parseInt(((pindex / this.numLeafs) - 0.5) * this.twoPage.edgeWidth);
// But then again for RTL it's the opposite
if ('rl' == this.pageProgression) {
offset = -offset;
}
return offset;
}
// leafEdgeWidth
//______________________________________________________________________________
// Returns the width of the leaf edge div for the page with index given
GnuBook.prototype.leafEdgeWidth = function(pindex) {
// $$$ could there be single pixel rounding errors for L vs R?
if ((this.getPageSide(pindex) == 'L') && (this.pageProgression != 'rl')) {
return parseInt( (pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
} else {
return parseInt( (1 - pindex/this.numLeafs) * this.twoPage.edgeWidth + 0.5);
}
}
// jumpIndexForLeftEdgePageX
//______________________________________________________________________________
// Returns the target jump leaf given a page coordinate (inside the left page edge div)
GnuBook.prototype.jumpIndexForLeftEdgePageX = function(pageX) {
if ('rl' != this.pageProgression) {
// LTR - flipping backward
var jumpIndex = this.twoPage.currentIndexL - ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
// browser may have resized the div due to font size change -- see https://bugs.launchpad.net/gnubook/+bug/333570
jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexL - 2);
return jumpIndex;
} else {
var jumpIndex = this.twoPage.currentIndexL + ($(this.leafEdgeL).offset().left + $(this.leafEdgeL).width() - pageX) * 10;
jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexL + 2, this.lastDisplayableIndex());
return jumpIndex;
}
}
// jumpIndexForRightEdgePageX
//______________________________________________________________________________
// Returns the target jump leaf given a page coordinate (inside the right page edge div)
GnuBook.prototype.jumpIndexForRightEdgePageX = function(pageX) {
if ('rl' != this.pageProgression) {
// LTR
var jumpIndex = this.twoPage.currentIndexR + (pageX - $(this.leafEdgeR).offset().left) * 10;
jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.twoPage.currentIndexR + 2, this.lastDisplayableIndex());
return jumpIndex;
} else {
var jumpIndex = this.twoPage.currentIndexR - (pageX - $(this.leafEdgeR).offset().left) * 10;
jumpIndex = GnuBook.util.clamp(Math.round(jumpIndex), this.firstDisplayableIndex(), this.twoPage.currentIndexR - 2);
return jumpIndex;
}
}
GnuBook.prototype.initToolbar = function(mode, ui) {
$("#GnuBook").append("
");
this.updateToolbarZoom(this.reduce); // Pretty format
if (ui == "embed") {
$("#GnuBook a.logo").attr("target","_blank");
}
// $$$ turn this into a member variable
var jToolbar = $('#GBtoolbar'); // j prefix indicates jQuery object
// We build in mode 2
jToolbar.append();
this.bindToolbarNavHandlers(jToolbar);
// Setup tooltips -- later we could load these from a file for i18n
var titles = { '.logo': 'Go to Archive.org',
'.zoom_in': 'Zoom in',
'.zoom_out': 'Zoom out',
'.one_page_mode': 'One-page view',
'.two_page_mode': 'Two-page view',
'.print': 'Print this page',
'.embed': 'Embed bookreader',
'.book_left': 'Flip left',
'.book_right': 'Flip right',
'.book_up': 'Page up',
'.book_down': 'Page down',
'.play': 'Play',
'.pause': 'Pause',
'.book_top': 'First page',
'.book_bottom': 'Last page'
};
if ('rl' == this.pageProgression) {
titles['.book_leftmost'] = 'Last page';
titles['.book_rightmost'] = 'First page';
} else { // LTR
titles['.book_leftmost'] = 'First page';
titles['.book_rightmost'] = 'Last page';
}
for (var icon in titles) {
jToolbar.find(icon).attr('title', titles[icon]);
}
// Hide mode buttons and autoplay if 2up is not available
// $$$ if we end up with more than two modes we should show the applicable buttons
if ( !this.canSwitchToMode(this.constMode2up) ) {
jToolbar.find('.one_page_mode, .two_page_mode, .play, .pause').hide();
}
// Switch to requested mode -- binds other click handlers
this.switchToolbarMode(mode);
}
// switchToolbarMode
//______________________________________________________________________________
// Update the toolbar for the given mode (changes navigation buttons)
// $$$ we should soon split the toolbar out into its own module
GnuBook.prototype.switchToolbarMode = function(mode) {
if (1 == mode) {
// 1-up
$('#GBtoolbar .GBtoolbarmode2').hide();
$('#GBtoolbar .GBtoolbarmode1').show().css('display', 'inline');
} else {
// 2-up
$('#GBtoolbar .GBtoolbarmode1').hide();
$('#GBtoolbar .GBtoolbarmode2').show().css('display', 'inline');
}
}
// bindToolbarNavHandlers
//______________________________________________________________________________
// Binds the toolbar handlers
GnuBook.prototype.bindToolbarNavHandlers = function(jToolbar) {
jToolbar.find('.book_left').bind('click', function(e) {
gb.left();
return false;
});
jToolbar.find('.book_right').bind('click', function(e) {
gb.right();
return false;
});
jToolbar.find('.book_up').bind('click', function(e) {
gb.prev();
return false;
});
jToolbar.find('.book_down').bind('click', function(e) {
gb.next();
return false;
});
jToolbar.find('.print').bind('click', function(e) {
gb.printPage();
return false;
});
jToolbar.find('.embed').bind('click', function(e) {
gb.showEmbedCode();
return false;
});
jToolbar.find('.play').bind('click', function(e) {
gb.autoToggle();
return false;
});
jToolbar.find('.pause').bind('click', function(e) {
gb.autoToggle();
return false;
});
jToolbar.find('.book_top').bind('click', function(e) {
gb.first();
return false;
});
jToolbar.find('.book_bottom').bind('click', function(e) {
gb.last();
return false;
});
jToolbar.find('.book_leftmost').bind('click', function(e) {
gb.leftmost();
return false;
});
jToolbar.find('.book_rightmost').bind('click', function(e) {
gb.rightmost();
return false;
});
}
// updateToolbarZoom(reduce)
//______________________________________________________________________________
// Update the displayed zoom factor based on reduction factor
GnuBook.prototype.updateToolbarZoom = function(reduce) {
var value;
if (this.constMode2up == this.mode && this.twoPage.autofit) {
value = 'Auto';
} else {
value = (100 / reduce).toFixed(2);
// Strip trailing zeroes and decimal if all zeroes
value = value.replace(/0+$/,'');
value = value.replace(/\.$/,'');
value += '%';
}
$('#GBzoom').text(value);
}
// firstDisplayableIndex
//______________________________________________________________________________
// Returns the index of the first visible page, dependent on the mode.
// $$$ Currently we cannot display the front/back cover in 2-up and will need to update
// this function when we can as part of https://bugs.launchpad.net/gnubook/+bug/296788
GnuBook.prototype.firstDisplayableIndex = function() {
if (this.mode != this.constMode2up) {
return 0;
}
if ('rl' != this.pageProgression) {
// LTR
if (this.getPageSide(0) == 'L') {
return 0;
} else {
return -1;
}
} else {
// RTL
if (this.getPageSide(0) == 'R') {
return 0;
} else {
return -1;
}
}
}
// lastDisplayableIndex
//______________________________________________________________________________
// Returns the index of the last visible page, dependent on the mode.
// $$$ Currently we cannot display the front/back cover in 2-up and will need to update
// this function when we can as pa rt of https://bugs.launchpad.net/gnubook/+bug/296788
GnuBook.prototype.lastDisplayableIndex = function() {
var lastIndex = this.numLeafs - 1;
if (this.mode != this.constMode2up) {
return lastIndex;
}
if ('rl' != this.pageProgression) {
// LTR
if (this.getPageSide(lastIndex) == 'R') {
return lastIndex;
} else {
return lastIndex + 1;
}
} else {
// RTL
if (this.getPageSide(lastIndex) == 'L') {
return lastIndex;
} else {
return lastIndex + 1;
}
}
}
// shortTitle(maximumCharacters)
//________
// Returns a shortened version of the title with the maximum number of characters
GnuBook.prototype.shortTitle = function(maximumCharacters) {
if (this.bookTitle.length < maximumCharacters) {
return this.bookTitle;
}
var title = this.bookTitle.substr(0, maximumCharacters - 3);
title += '...';
return title;
}
// Parameter related functions
// updateFromParams(params)
//________
// Update ourselves from the params object.
//
// e.g. this.updateFromParams(this.paramsFromFragment(window.location.hash))
GnuBook.prototype.updateFromParams = function(params) {
if ('undefined' != typeof(params.mode)) {
this.switchMode(params.mode);
}
// process /search
if ('undefined' != typeof(params.searchTerm)) {
if (this.searchTerm != params.searchTerm) {
this.search(params.searchTerm);
}
}
// $$$ process /zoom
// We only respect page if index is not set
if ('undefined' != typeof(params.index)) {
if (params.index != this.currentIndex()) {
this.jumpToIndex(params.index);
}
} else if ('undefined' != typeof(params.page)) {
// $$$ this assumes page numbers are unique
if (params.page != this.getPageNum(this.currentIndex())) {
this.jumpToPage(params.page);
}
}
// $$$ process /region
// $$$ process /highlight
}
// paramsFromFragment(urlFragment)
//________
// Returns a object with configuration parametes from a URL fragment.
//
// E.g paramsFromFragment(window.location.hash)
GnuBook.prototype.paramsFromFragment = function(urlFragment) {
// URL fragment syntax specification: http://openlibrary.org/dev/docs/bookurls
var params = {};
// For convenience we allow an initial # character (as from window.location.hash)
// but don't require it
if (urlFragment.substr(0,1) == '#') {
urlFragment = urlFragment.substr(1);
}
// Simple #nn syntax
var oldStyleLeafNum = parseInt( /^\d+$/.exec(urlFragment) );
if ( !isNaN(oldStyleLeafNum) ) {
params.index = oldStyleLeafNum;
// Done processing if using old-style syntax
return params;
}
// Split into key-value pairs
var urlArray = urlFragment.split('/');
var urlHash = {};
for (var i = 0; i < urlArray.length; i += 2) {
urlHash[urlArray[i]] = urlArray[i+1];
}
// Mode
if ('1up' == urlHash['mode']) {
params.mode = this.constMode1up;
} else if ('2up' == urlHash['mode']) {
params.mode = this.constMode2up;
}
// Index and page
if ('undefined' != typeof(urlHash['page'])) {
// page was set -- may not be int
params.page = urlHash['page'];
}
// $$$ process /region
// $$$ process /search
if (urlHash['search'] != undefined) {
params.searchTerm = GnuBook.util.decodeURIComponentPlus(urlHash['search']);
}
// $$$ process /highlight
return params;
}
// paramsFromCurrent()
//________
// Create a params object from the current parameters.
GnuBook.prototype.paramsFromCurrent = function() {
var params = {};
var index = this.currentIndex();
var pageNum = this.getPageNum(index);
if ((pageNum === 0) || pageNum) {
params.page = pageNum;
}
params.index = index;
params.mode = this.mode;
// $$$ highlight
// $$$ region
// search
if (this.searchHighlightVisible()) {
params.searchTerm = this.searchTerm;
}
return params;
}
// fragmentFromParams(params)
//________
// Create a fragment string from the params object.
// See http://openlibrary.org/dev/docs/bookurls for an explanation of the fragment syntax.
GnuBook.prototype.fragmentFromParams = function(params) {
var separator = '/';
var fragments = [];
if ('undefined' != typeof(params.page)) {
fragments.push('page', params.page);
} else {
// Don't have page numbering -- use index instead
fragments.push('page', 'n' + params.index);
}
// $$$ highlight
// $$$ region
// mode
if ('undefined' != typeof(params.mode)) {
if (params.mode == this.constMode1up) {
fragments.push('mode', '1up');
} else if (params.mode == this.constMode2up) {
fragments.push('mode', '2up');
} else {
throw 'fragmentFromParams called with unknown mode ' + params.mode;
}
}
// search
if (params.searchTerm) {
fragments.push('search', params.searchTerm);
}
return GnuBook.util.encodeURIComponentPlus(fragments.join(separator)).replace(/%2F/g, '/');
}
// getPageIndex(pageNum)
//________
// Returns the *highest* index the given page number, or undefined
GnuBook.prototype.getPageIndex = function(pageNum) {
var pageIndices = this.getPageIndices(pageNum);
if (pageIndices.length > 0) {
return pageIndices[pageIndices.length - 1];
}
return undefined;
}
// getPageIndices(pageNum)
//________
// Returns an array (possibly empty) of the indices with the given page number
GnuBook.prototype.getPageIndices = function(pageNum) {
var indices = [];
// Check for special "nXX" page number
if (pageNum.slice(0,1) == 'n') {
try {
var pageIntStr = pageNum.slice(1, pageNum.length);
var pageIndex = parseInt(pageIntStr);
indices.push(pageIndex);
return indices;
} catch(err) {
// Do nothing... will run through page names and see if one matches
}
}
var i;
for (i=0; i " + newHash);
// Queue change if animating
if (self.animating) {
self.autoStop();
self.animationFinishedCallback = function() {
self.updateFromParams(self.paramsFromFragment(newHash));
}
} else { // update immediately
self.updateFromParams(self.paramsFromFragment(newHash));
}
self.oldUserHash = newHash;
}
}
}, 500);
}
// canSwitchToMode
//________
// Returns true if we can switch to the requested mode
GnuBook.prototype.canSwitchToMode = function(mode) {
if (mode == this.constMode2up) {
// check there are enough pages to display
// $$$ this is a workaround for the mis-feature that we can't display
// short books in 2up mode
if (this.numLeafs < 6) {
return false;
}
}
return true;
}
// searchHighlightVisible
//________
// Returns true if a search highlight is currently being displayed
GnuBook.prototype.searchHighlightVisible = function() {
if (this.constMode2up == this.mode) {
if (this.searchResults[this.twoPage.currentIndexL]
|| this.searchResults[this.twoPage.currentIndexR]) {
return true;
}
} else { // 1up
if (this.searchResults[this.currentIndex()]) {
return true;
}
}
return false;
}
// getPageBackgroundColor
//--------
// Returns a CSS property string for the background color for the given page
// $$$ turn into regular CSS?
GnuBook.prototype.getPageBackgroundColor = function(index) {
if (index >= 0 && index < this.numLeafs) {
// normal page
return this.pageDefaultBackgroundColor;
}
return '';
}
// _getPageWidth
//--------
// Returns the page width for the given index, or first or last page if out of range
GnuBook.prototype._getPageWidth = function(index) {
// Synthesize a page width for pages not actually present in book.
// May or may not be the best approach.
// If index is out of range we return the width of first or last page
index = GnuBook.util.clamp(index, 0, this.numLeafs - 1);
return this.getPageWidth(index);
}
// _getPageHeight
//--------
// Returns the page height for the given index, or first or last page if out of range
GnuBook.prototype._getPageHeight= function(index) {
index = GnuBook.util.clamp(index, 0, this.numLeafs - 1);
return this.getPageHeight(index);
}
// _getPageURI
//--------
// Returns the page URI or transparent image if out of range
GnuBook.prototype._getPageURI = function(index, reduce, rotate) {
if (index < 0 || index >= this.numLeafs) { // Synthesize page
return this.imagesBaseURL + "/transparent.png";
}
return this.getPageURI(index, reduce, rotate);
}
// Library functions
GnuBook.util = {
clamp: function(value, min, max) {
return Math.min(Math.max(value, min), max);
},
getIFrameDocument: function(iframe) {
// Adapted from http://xkr.us/articles/dom/iframe-document/
var outer = (iframe.contentWindow || iframe.contentDocument);
return (outer.document || outer);
},
decodeURIComponentPlus: function(value) {
// Decodes a URI component and converts '+' to ' '
return decodeURIComponent(value).replace(/\+/g, ' ');
},
encodeURIComponentPlus: function(value) {
// Encodes a URI component and converts ' ' to '+'
return encodeURIComponent(value).replace(/%20/g, '+');
}
// The final property here must NOT have a comma after it - IE7
}