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604
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1 /*
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2 * digilib jQuery plugin
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3 *
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4 */
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5
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6 (function($) {
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605
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7
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8 var defaults = {
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9 /* base URL to Scaler servlet */
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10 'scalerUrl' : 'http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler',
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11 /* digilib image path i.e. fn */
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607
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12 'fn' : '',
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605
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13 /* mode of operation.
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14 * fullscreen: takes parameters from page URL, keeps state in page URL
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15 * embedded: takes parameters from Javascript options, keeps state inside object
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16 */
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17 'interactionMode' : 'fullscreen'
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18 };
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19
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20 /* parameters from the query string */
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607
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21 var queryParams = {};
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604
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22
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23 var methods = {
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24 init : function(options) {
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607
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25 var settings = $.extend({}, defaults, options);
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26 var isFullscreen = settings.interactionMode === 'fullscreen';
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27 if (isFullscreen) {
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28 queryParams = parseQueryParams();
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29 };
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604
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30 return this.each(function() {
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605
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31 var $elem = $(this);
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32 var data = $elem.data('digilib');
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607
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33 var elemSettings;
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604
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34 // If the plugin hasn't been initialized yet
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35 if (!data) {
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605
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36 // settings for this digilib instance are merged from defaults and options
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37 // merge query parameters
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607
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38 if (isFullscreen) {
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39 elemSettings = $.extend({}, settings, queryParams);
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40 } else {
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41 elemSettings = $.extend({}, settings, parseImgParams($elem));
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42 };
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605
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43 // store in data element
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44 $elem.data('digilib', {
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45 target : $elem,
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607
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46 settings : elemSettings
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604
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47 });
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48 }
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49 });
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50 },
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51 destroy : function() {
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52 return this.each(function(){
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53 var $this = $(this);
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54 var data = $this.data('digilib');
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55 // Namespacing FTW
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605
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56 $(window).unbind('.digilib'); // unbinds all digilibs(?)
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604
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57 data.digilib.remove();
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58 $this.removeData('digilib');
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59 });
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60 }
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605
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61 };
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604
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62
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605
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63 // returns object with parameters from the query string or an embedded img-tag (depending on interactionMode)
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607
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64 var parseQueryParams = function() {
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65 return parseQueryString(location.search.slice(1));
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66 };
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67
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68 var parseImgParams = function($elem) {
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69 var src = $elem.children('img').attr('src');
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70 var pos = src.indexOf('?');
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71 var query = (pos < 0) ? '' : src.substring(pos + 1);
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72 var scalerUrl = src.substring(0, pos);
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73 var hash = parseQueryString(query);
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74 hash.scalerUrl = scalerUrl;
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75 // console.log(hash);
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76 return hash;
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77 };
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78
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79 var parseQueryString = function(query) {
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80 var pairs = query.split("&");
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81 var hash = {};
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82 for (var i = 0; i < pairs.length; i++) {
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83 var pair = pairs[i].split("=");
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84 if (pair.length === 2) {
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85 hash[pair[0]] = pair[1]
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86 };
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87 };
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88 return hash;
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89 };
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604
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90
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605
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91 // hook plugin into jquery
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92 $.fn.digilib = function(method) {
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93 if (methods[method]) {
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94 return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
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95 } else if (typeof(method) === 'object' || !method) {
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96 return methods.init.apply(this, arguments);
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97 } else {
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98 $.error( 'Method ' + method + ' does not exist on jQuery.digilib' );
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99 }
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100 };
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604
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101
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102 })(jQuery); |
