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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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608
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9 // base URL to Scaler servlet
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10 'scalerBaseUrl' : 'http://digilib.mpiwg-berlin.mpg.de/digitallibrary/servlet/Scaler',
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11 // list of Scaler parameters
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12 'scalerParamNames' : ['fn','pn','dw','dh','ww','wh','wx','wy','ws','mo'],
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13 // digilib image path
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607
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14 'fn' : '',
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608
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15 // mode of operation.
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16 // fullscreen: takes parameters from page URL, keeps state in page URL
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17 // embedded: takes parameters from Javascript options, keeps state inside object
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605
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18 'interactionMode' : 'fullscreen'
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19 };
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20
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608
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21 // parameters from the query string
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607
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22 var queryParams = {};
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608
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23
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24 // affine geometry classes
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25 var geom = dlGeometry();
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604
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26
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27 var methods = {
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608
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28 // digilib initialization
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604
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29 init : function(options) {
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608
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30 // settings for this digilib instance are merged from defaults and options
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607
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31 var settings = $.extend({}, defaults, options);
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32 var isFullscreen = settings.interactionMode === 'fullscreen';
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33 if (isFullscreen) {
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34 queryParams = parseQueryParams();
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35 };
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604
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36 return this.each(function() {
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605
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37 var $elem = $(this);
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38 var data = $elem.data('digilib');
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607
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39 var elemSettings;
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608
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40 // if the plugin hasn't been initialized yet
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604
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41 if (!data) {
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605
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42 // merge query parameters
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607
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43 if (isFullscreen) {
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44 elemSettings = $.extend({}, settings, queryParams);
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45 } else {
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46 elemSettings = $.extend({}, settings, parseImgParams($elem));
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47 };
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605
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48 // store in data element
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49 $elem.data('digilib', {
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50 target : $elem,
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607
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51 settings : elemSettings
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52 });
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53 }
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608
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54 // create HTML structure
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55 setupScalerDiv($elem, elemSettings);
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604
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56 });
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57 },
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608
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58
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59 // clean up digilib
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604
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60 destroy : function() {
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61 return this.each(function(){
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62 var $this = $(this);
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63 var data = $this.data('digilib');
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64 // Namespacing FTW
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605
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65 $(window).unbind('.digilib'); // unbinds all digilibs(?)
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604
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66 data.digilib.remove();
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67 $this.removeData('digilib');
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68 });
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69 }
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605
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70 };
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604
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71
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608
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72 // returns parameters from page url
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607
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73 var parseQueryParams = function() {
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74 return parseQueryString(location.search.slice(1));
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75 };
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76
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608
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77 // returns parameters taken from embedded img-element
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607
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78 var parseImgParams = function($elem) {
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79 var src = $elem.children('img').attr('src');
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80 var pos = src.indexOf('?');
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81 var query = (pos < 0) ? '' : src.substring(pos + 1);
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82 var scalerUrl = src.substring(0, pos);
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83 var hash = parseQueryString(query);
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84 hash.scalerUrl = scalerUrl;
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85 // console.log(hash);
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86 return hash;
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87 };
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88
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608
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89 // parses query parameter string into parameter object
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607
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90 var parseQueryString = function(query) {
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91 var pairs = query.split("&");
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92 var hash = {};
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93 for (var i = 0; i < pairs.length; i++) {
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94 var pair = pairs[i].split("=");
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95 if (pair.length === 2) {
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608
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96 hash[pair[0]] = pair[1];
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607
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97 };
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98 };
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99 return hash;
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100 };
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604
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101
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608
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102 // returns URL and query string for Scaler
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103 var getScalerString = function (settings) {
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104 var url = settings.scalerUrl;
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105
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106 };
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107
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108 // creates HTML structure for digilib in elem
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109 var setupScalerDiv = function ($elem, settings) {
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110 if (settings.interactionMode === 'fullscreen') {
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111 // fullscreen -- create new
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112 $elem.empty(); // TODO: should we keep stuff for customization?
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113 var scalerHTML = '<div class="scaler"><img class="pic"/></div>';
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114 $elem.add(scalerHTML);
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115
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116 }
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117 };
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118
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605
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119 // hook plugin into jquery
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120 $.fn.digilib = function(method) {
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121 if (methods[method]) {
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122 return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
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123 } else if (typeof(method) === 'object' || !method) {
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124 return methods.init.apply(this, arguments);
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125 } else {
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126 $.error( 'Method ' + method + ' does not exist on jQuery.digilib' );
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127 }
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128 };
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604
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129
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130 })(jQuery); |
