@elibrary-inno/bookreader
Version:
The Internet Archive BookReader.
113 lines (98 loc) • 3.79 kB
JavaScript
//
// This file shows the minimum you need to provide to BookReader to display a book
//
// Copyright(c)2008-2009 Internet Archive. Software license AGPL version 3.
// Create the BookReader object
var options = {
// Total number of leafs
getNumLeafs: function() {
return 15;
},
// Return the width of a given page. Here we assume all images are 800 pixels wide
getPageWidth: function(index) {
return 800;
},
// Return the height of a given page. Here we assume all images are 1200 pixels high
getPageHeight: function(index) {
return 1200;
},
// We load the images from archive.org -- you can modify this function to retrieve images
// using a different URL structure
getPageURI: function(index, reduce, rotate) {
// reduce and rotate are ignored in this simple implementation, but we
// could e.g. look at reduce and load images from a different directory
// or pass the information to an image server
var leafStr = '000';
var imgStr = (index+1).toString();
var re = new RegExp("0{"+imgStr.length+"}$");
var url = 'http://archive.org/download/BookReader/img/page'+leafStr.replace(re, imgStr) + '.jpg';
return url;
},
// Return which side, left or right, that a given page should be displayed on
getPageSide: function(index) {
if (0 == (index & 0x1)) {
return 'R';
} else {
return 'L';
}
},
// This function returns the left and right indices for the user-visible
// spread that contains the given index. The return values may be
// null if there is no facing page or the index is invalid.
getSpreadIndices: function(pindex) {
var spreadIndices = [null, null];
if ('rl' == this.pageProgression) {
// Right to Left
if (this.getPageSide(pindex) == 'R') {
spreadIndices[1] = pindex;
spreadIndices[0] = pindex + 1;
} else {
// Given index was LHS
spreadIndices[0] = pindex;
spreadIndices[1] = pindex - 1;
}
} else {
// Left to right
if (this.getPageSide(pindex) == 'L') {
spreadIndices[0] = pindex;
spreadIndices[1] = pindex + 1;
} else {
// Given index was RHS
spreadIndices[1] = pindex;
spreadIndices[0] = pindex - 1;
}
}
return spreadIndices;
},
// For a given "accessible page index" return the page number in the book.
//
// For example, index 5 might correspond to "Page 1" if there is front matter such
// as a title page and table of contents.
getPageNum: function(index) {
return index+1;
},
// Book title and the URL used for the book title link
bookTitle: 'BookReader Advanced Demo',
bookUrl: '../index.html',
bookUrlText: 'Back to Demos',
bookUrlTitle: 'This is the book URL title',
// thumbnail is optional, but it is used in the info dialog
thumbnail: '//archive.org/download/BookReader/img/page014.jpg',
// Metadata is optional, but it is used in the info dialog
metadata: [
{label: 'Title', value: 'Open Library BookReader Presentation'},
{label: 'Author', value: 'Internet Archive'},
{label: 'Demo Info', value: 'This demo shows how one could use BookReader with their own content.'},
],
// Override the path used to find UI images
imagesBaseURL: '../BookReader/images/',
getEmbedCode: function(frameWidth, frameHeight, viewParams) {
return "Embed code not supported in bookreader demo.";
},
// Note previously the UI param was used for mobile, but it's going to be responsive
// embed === iframe
ui: 'full', // embed, full (responsive)
};
var br = new BookReader(options);
// Let's go!
br.init();