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26
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1 /*
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2 Google HTML5 slides template
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3
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4 Authors: Luke Mahé (code)
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5 Marcin Wichary (code and design)
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6
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7 Dominic Mazzoni (browser compatibility)
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8 Charles Chen (ChromeVox support)
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9
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10 URL: http://code.google.com/p/html5slides/
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11
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12
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13 var PERMANENT_URL_PREFIX = 'http://html5slides.googlecode.com/svn/trunk/';
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14 */
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15 var PERMANENT_URL_PREFIX = './';
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16 var SLIDE_CLASSES = ['far-past', 'past', 'current', 'next', 'far-next'];
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17
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18 var PM_TOUCH_SENSITIVITY = 15;
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19
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20 var curSlide;
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21
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22 /* ---------------------------------------------------------------------- */
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23 /* classList polyfill by Eli Grey
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24 * (http://purl.eligrey.com/github/classList.js/blob/master/classList.js) */
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25
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26 if (typeof document !== "undefined" && !("classList" in document.createElement("a"))) {
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27
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28 (function (view) {
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29
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30 var
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31 classListProp = "classList"
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32 , protoProp = "prototype"
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33 , elemCtrProto = (view.HTMLElement || view.Element)[protoProp]
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34 , objCtr = Object
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35 strTrim = String[protoProp].trim || function () {
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36 return this.replace(/^\s+|\s+$/g, "");
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37 }
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38 , arrIndexOf = Array[protoProp].indexOf || function (item) {
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39 for (var i = 0, len = this.length; i < len; i++) {
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40 if (i in this && this[i] === item) {
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41 return i;
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42 }
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43 }
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44 return -1;
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45 }
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46 // Vendors: please allow content code to instantiate DOMExceptions
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47 , DOMEx = function (type, message) {
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48 this.name = type;
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49 this.code = DOMException[type];
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50 this.message = message;
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51 }
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52 , checkTokenAndGetIndex = function (classList, token) {
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53 if (token === "") {
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54 throw new DOMEx(
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55 "SYNTAX_ERR"
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56 , "An invalid or illegal string was specified"
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57 );
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58 }
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59 if (/\s/.test(token)) {
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60 throw new DOMEx(
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61 "INVALID_CHARACTER_ERR"
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62 , "String contains an invalid character"
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63 );
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64 }
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65 return arrIndexOf.call(classList, token);
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66 }
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67 , ClassList = function (elem) {
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68 var
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69 trimmedClasses = strTrim.call(elem.className)
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70 , classes = trimmedClasses ? trimmedClasses.split(/\s+/) : []
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71 ;
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72 for (var i = 0, len = classes.length; i < len; i++) {
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73 this.push(classes[i]);
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74 }
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75 this._updateClassName = function () {
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76 elem.className = this.toString();
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77 };
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78 }
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79 , classListProto = ClassList[protoProp] = []
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80 , classListGetter = function () {
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81 return new ClassList(this);
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82 }
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83 ;
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84 // Most DOMException implementations don't allow calling DOMException's toString()
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85 // on non-DOMExceptions. Error's toString() is sufficient here.
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86 DOMEx[protoProp] = Error[protoProp];
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87 classListProto.item = function (i) {
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88 return this[i] || null;
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89 };
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90 classListProto.contains = function (token) {
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91 token += "";
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92 return checkTokenAndGetIndex(this, token) !== -1;
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93 };
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94 classListProto.add = function (token) {
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95 token += "";
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96 if (checkTokenAndGetIndex(this, token) === -1) {
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97 this.push(token);
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98 this._updateClassName();
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99 }
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100 };
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101 classListProto.remove = function (token) {
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102 token += "";
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103 var index = checkTokenAndGetIndex(this, token);
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104 if (index !== -1) {
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105 this.splice(index, 1);
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106 this._updateClassName();
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107 }
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108 };
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109 classListProto.toggle = function (token) {
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110 token += "";
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111 if (checkTokenAndGetIndex(this, token) === -1) {
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112 this.add(token);
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113 } else {
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114 this.remove(token);
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115 }
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116 };
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117 classListProto.toString = function () {
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118 return this.join(" ");
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119 };
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120
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121 if (objCtr.defineProperty) {
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122 var classListPropDesc = {
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123 get: classListGetter
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124 , enumerable: true
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125 , configurable: true
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126 };
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127 try {
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128 objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
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129 } catch (ex) { // IE 8 doesn't support enumerable:true
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130 if (ex.number === -0x7FF5EC54) {
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131 classListPropDesc.enumerable = false;
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132 objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
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133 }
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134 }
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135 } else if (objCtr[protoProp].__defineGetter__) {
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136 elemCtrProto.__defineGetter__(classListProp, classListGetter);
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137 }
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138
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139 }(self));
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140
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141 }
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142 /* ---------------------------------------------------------------------- */
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143
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144 /* Slide movement */
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145
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146 function getSlideEl(no) {
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147 if ((no < 0) || (no >= slideEls.length)) {
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148 return null;
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149 } else {
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150 return slideEls[no];
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151 }
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152 };
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153
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154 function updateSlideClass(slideNo, className) {
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155 var el = getSlideEl(slideNo);
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156
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157 if (!el) {
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158 return;
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159 }
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160
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161 if (className) {
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162 el.classList.add(className);
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163 }
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164
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165 for (var i in SLIDE_CLASSES) {
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166 if (className != SLIDE_CLASSES[i]) {
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167 el.classList.remove(SLIDE_CLASSES[i]);
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168 }
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169 }
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170 };
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171
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172 function updateSlides() {
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173 for (var i = 0; i < slideEls.length; i++) {
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174 switch (i) {
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175 case curSlide - 2:
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176 updateSlideClass(i, 'far-past');
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177 break;
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178 case curSlide - 1:
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179 updateSlideClass(i, 'past');
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180 break;
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181 case curSlide:
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182 updateSlideClass(i, 'current');
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183 break;
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184 case curSlide + 1:
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185 updateSlideClass(i, 'next');
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186 break;
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187 case curSlide + 2:
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188 updateSlideClass(i, 'far-next');
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189 break;
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190 default:
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191 updateSlideClass(i);
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192 break;
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193 }
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194 }
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195
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196 triggerLeaveEvent(curSlide - 1);
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197 triggerEnterEvent(curSlide);
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198
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199 window.setTimeout(function() {
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200 // Hide after the slide
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201 disableSlideFrames(curSlide - 2);
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202 }, 301);
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203
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204 enableSlideFrames(curSlide - 1);
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205 enableSlideFrames(curSlide + 2);
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206
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207 if (isChromeVoxActive()) {
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208 speakAndSyncToNode(slideEls[curSlide]);
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209 }
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210
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211 updateHash();
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212 };
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213
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214 function buildNextItem() {
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215 var toBuild = slideEls[curSlide].querySelectorAll('.to-build');
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216
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217 if (!toBuild.length) {
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218 return false;
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219 }
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220
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221 toBuild[0].classList.remove('to-build', '');
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222
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223 if (isChromeVoxActive()) {
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224 speakAndSyncToNode(toBuild[0]);
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225 }
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226
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227 return true;
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228 };
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229
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230 function prevSlide() {
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231 if (curSlide > 0) {
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232 curSlide--;
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233
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234 updateSlides();
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235 }
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236 };
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237
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238 function nextSlide() {
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239 if (buildNextItem()) {
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240 return;
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241 }
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242
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243 if (curSlide < slideEls.length - 1) {
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244 curSlide++;
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245
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246 updateSlides();
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247 }
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248 };
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249
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250 /* Slide events */
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251
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252 function triggerEnterEvent(no) {
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253 var el = getSlideEl(no);
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254 if (!el) {
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255 return;
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256 }
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257
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258 var onEnter = el.getAttribute('onslideenter');
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259 if (onEnter) {
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260 new Function(onEnter).call(el);
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261 }
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262
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263 var evt = document.createEvent('Event');
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264 evt.initEvent('slideenter', true, true);
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265 evt.slideNumber = no + 1; // Make it readable
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266
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267 el.dispatchEvent(evt);
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268 };
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269
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270 function triggerLeaveEvent(no) {
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271 var el = getSlideEl(no);
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272 if (!el) {
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273 return;
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274 }
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275
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276 var onLeave = el.getAttribute('onslideleave');
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277 if (onLeave) {
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278 new Function(onLeave).call(el);
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279 }
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280
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281 var evt = document.createEvent('Event');
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282 evt.initEvent('slideleave', true, true);
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283 evt.slideNumber = no + 1; // Make it readable
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284
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285 el.dispatchEvent(evt);
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286 };
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287
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288 /* Touch events */
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289
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290 function handleTouchStart(event) {
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291 if (event.touches.length == 1) {
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292 touchDX = 0;
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293 touchDY = 0;
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294
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295 touchStartX = event.touches[0].pageX;
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296 touchStartY = event.touches[0].pageY;
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297
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298 document.body.addEventListener('touchmove', handleTouchMove, true);
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299 document.body.addEventListener('touchend', handleTouchEnd, true);
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300 }
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301 };
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302
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303 function handleTouchMove(event) {
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304 if (event.touches.length > 1) {
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305 cancelTouch();
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306 } else {
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307 touchDX = event.touches[0].pageX - touchStartX;
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308 touchDY = event.touches[0].pageY - touchStartY;
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309 }
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310 };
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311
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312 function handleTouchEnd(event) {
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313 var dx = Math.abs(touchDX);
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314 var dy = Math.abs(touchDY);
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315
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316 if ((dx > PM_TOUCH_SENSITIVITY) && (dy < (dx * 2 / 3))) {
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317 if (touchDX > 0) {
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318 prevSlide();
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319 } else {
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320 nextSlide();
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321 }
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322 }
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323
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324 cancelTouch();
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325 };
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326
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327 function cancelTouch() {
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328 document.body.removeEventListener('touchmove', handleTouchMove, true);
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329 document.body.removeEventListener('touchend', handleTouchEnd, true);
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330 };
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331
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332 /* Preloading frames */
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333
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334 function disableSlideFrames(no) {
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335 var el = getSlideEl(no);
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336 if (!el) {
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337 return;
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338 }
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339
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340 var frames = el.getElementsByTagName('iframe');
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341 for (var i = 0, frame; frame = frames[i]; i++) {
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342 disableFrame(frame);
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343 }
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344 };
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345
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346 function enableSlideFrames(no) {
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347 var el = getSlideEl(no);
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348 if (!el) {
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349 return;
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350 }
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351
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352 var frames = el.getElementsByTagName('iframe');
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353 for (var i = 0, frame; frame = frames[i]; i++) {
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354 enableFrame(frame);
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355 }
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356 };
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357
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358 function disableFrame(frame) {
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359 frame.src = 'about:blank';
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360 };
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361
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362 function enableFrame(frame) {
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363 var src = frame._src;
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364
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365 if (frame.src != src && src != 'about:blank') {
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366 frame.src = src;
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367 }
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368 };
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369
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370 function setupFrames() {
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371 var frames = document.querySelectorAll('iframe');
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372 for (var i = 0, frame; frame = frames[i]; i++) {
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373 frame._src = frame.src;
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374 disableFrame(frame);
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375 }
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376
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377 enableSlideFrames(curSlide);
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378 enableSlideFrames(curSlide + 1);
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379 enableSlideFrames(curSlide + 2);
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380 };
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381
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382 function setupInteraction() {
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383 /* Clicking and tapping */
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384
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385 var el = document.createElement('div');
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386 el.className = 'slide-area';
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387 el.id = 'prev-slide-area';
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388 el.addEventListener('click', prevSlide, false);
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389 document.querySelector('section.slides').appendChild(el);
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390
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391 var el = document.createElement('div');
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392 el.className = 'slide-area';
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393 el.id = 'next-slide-area';
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394 el.addEventListener('click', nextSlide, false);
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395 document.querySelector('section.slides').appendChild(el);
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396
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397 /* Swiping */
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398
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399 document.body.addEventListener('touchstart', handleTouchStart, false);
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400 }
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401
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402 /* ChromeVox support */
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403
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404 function isChromeVoxActive() {
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405 if (typeof(cvox) == 'undefined') {
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406 return false;
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407 } else {
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408 return true;
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409 }
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410 };
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411
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412 function speakAndSyncToNode(node) {
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413 if (!isChromeVoxActive()) {
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414 return;
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415 }
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416
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417 cvox.ChromeVox.navigationManager.switchToStrategy(
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418 cvox.ChromeVoxNavigationManager.STRATEGIES.LINEARDOM, 0, true);
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419 cvox.ChromeVox.navigationManager.syncToNode(node);
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420 cvox.ChromeVoxUserCommands.finishNavCommand('');
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421 var target = node;
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422 while (target.firstChild) {
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423 target = target.firstChild;
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424 }
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425 cvox.ChromeVox.navigationManager.syncToNode(target);
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426 };
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427
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428 function speakNextItem() {
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429 if (!isChromeVoxActive()) {
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430 return;
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431 }
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432
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433 cvox.ChromeVox.navigationManager.switchToStrategy(
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434 cvox.ChromeVoxNavigationManager.STRATEGIES.LINEARDOM, 0, true);
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435 cvox.ChromeVox.navigationManager.next(true);
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436 if (!cvox.DomUtil.isDescendantOfNode(
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437 cvox.ChromeVox.navigationManager.getCurrentNode(), slideEls[curSlide])){
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438 var target = slideEls[curSlide];
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439 while (target.firstChild) {
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440 target = target.firstChild;
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441 }
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442 cvox.ChromeVox.navigationManager.syncToNode(target);
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443 cvox.ChromeVox.navigationManager.next(true);
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444 }
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445 cvox.ChromeVoxUserCommands.finishNavCommand('');
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446 };
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447
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448 function speakPrevItem() {
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449 if (!isChromeVoxActive()) {
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450 return;
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451 }
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452
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453 cvox.ChromeVox.navigationManager.switchToStrategy(
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454 cvox.ChromeVoxNavigationManager.STRATEGIES.LINEARDOM, 0, true);
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455 cvox.ChromeVox.navigationManager.previous(true);
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456 if (!cvox.DomUtil.isDescendantOfNode(
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457 cvox.ChromeVox.navigationManager.getCurrentNode(), slideEls[curSlide])){
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458 var target = slideEls[curSlide];
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459 while (target.lastChild){
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460 target = target.lastChild;
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461 }
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462 cvox.ChromeVox.navigationManager.syncToNode(target);
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463 cvox.ChromeVox.navigationManager.previous(true);
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464 }
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465 cvox.ChromeVoxUserCommands.finishNavCommand('');
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466 };
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467
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468 /* Hash functions */
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469
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470 function getCurSlideFromHash() {
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471 var slideNo = parseInt(location.hash.substr(1));
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472
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473 if (slideNo) {
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474 curSlide = slideNo - 1;
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475 } else {
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476 curSlide = 0;
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477 }
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478 };
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479
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480 function updateHash() {
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481 location.replace('#' + (curSlide + 1));
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482 };
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483
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484 /* Event listeners */
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485
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486 function handleBodyKeyDown(event) {
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487 switch (event.keyCode) {
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488 case 39: // right arrow
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489 case 13: // Enter
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490 case 32: // space
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491 case 34: // PgDn
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492 nextSlide();
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493 event.preventDefault();
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494 break;
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495
|
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496 case 37: // left arrow
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497 case 8: // Backspace
|
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498 case 33: // PgUp
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499 prevSlide();
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500 event.preventDefault();
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|
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501 break;
|
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|
502
|
|
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503 case 40: // down arrow
|
|
|
504 if (isChromeVoxActive()) {
|
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|
505 speakNextItem();
|
|
|
506 } else {
|
|
|
507 nextSlide();
|
|
|
508 }
|
|
|
509 event.preventDefault();
|
|
|
510 break;
|
|
|
511
|
|
|
512 case 38: // up arrow
|
|
|
513 if (isChromeVoxActive()) {
|
|
|
514 speakPrevItem();
|
|
|
515 } else {
|
|
|
516 prevSlide();
|
|
|
517 }
|
|
|
518 event.preventDefault();
|
|
|
519 break;
|
|
|
520 }
|
|
|
521 };
|
|
|
522
|
|
|
523 function addEventListeners() {
|
|
|
524 document.addEventListener('keydown', handleBodyKeyDown, false);
|
|
|
525 };
|
|
|
526
|
|
|
527 /* Initialization */
|
|
|
528
|
|
|
529 function addPrettify() {
|
|
|
530 var els = document.querySelectorAll('pre');
|
|
|
531 for (var i = 0, el; el = els[i]; i++) {
|
|
|
532 if (!el.classList.contains('noprettyprint')) {
|
|
|
533 el.classList.add('prettyprint');
|
|
|
534 }
|
|
|
535 }
|
|
|
536
|
|
|
537 var el = document.createElement('script');
|
|
|
538 el.type = 'text/javascript';
|
|
|
539 el.src = PERMANENT_URL_PREFIX + 'prettify.js';
|
|
|
540 el.onload = function() {
|
|
|
541 prettyPrint();
|
|
|
542 }
|
|
|
543 document.body.appendChild(el);
|
|
|
544 };
|
|
|
545
|
|
|
546 function addFontStyle() {
|
|
|
547 var el = document.createElement('link');
|
|
|
548 el.rel = 'stylesheet';
|
|
|
549 el.type = 'text/css';
|
|
|
550 el.href = 'http://fonts.googleapis.com/css?family=' +
|
|
|
551 'Open+Sans:regular,semibold,italic,italicsemibold|Droid+Sans+Mono';
|
|
|
552
|
|
|
553 document.body.appendChild(el);
|
|
|
554 };
|
|
|
555
|
|
|
556 function addGeneralStyle() {
|
|
|
557 var el = document.createElement('link');
|
|
|
558 el.rel = 'stylesheet';
|
|
|
559 el.type = 'text/css';
|
|
|
560 el.href = PERMANENT_URL_PREFIX + 'styles.css';
|
|
|
561 document.body.appendChild(el);
|
|
|
562
|
|
|
563 var el = document.createElement('meta');
|
|
|
564 el.name = 'viewport';
|
|
|
565 el.content = 'width=1100,height=750';
|
|
|
566 document.querySelector('head').appendChild(el);
|
|
|
567
|
|
|
568 var el = document.createElement('meta');
|
|
|
569 el.name = 'apple-mobile-web-app-capable';
|
|
|
570 el.content = 'yes';
|
|
|
571 document.querySelector('head').appendChild(el);
|
|
|
572 };
|
|
|
573
|
|
|
574 function makeBuildLists() {
|
|
|
575 for (var i = curSlide, slide; slide = slideEls[i]; i++) {
|
|
|
576 var items = slide.querySelectorAll('.build > *');
|
|
|
577 for (var j = 0, item; item = items[j]; j++) {
|
|
|
578 if (item.classList) {
|
|
|
579 item.classList.add('to-build');
|
|
|
580 }
|
|
|
581 }
|
|
|
582 }
|
|
|
583 };
|
|
|
584
|
|
|
585 function handleDomLoaded() {
|
|
|
586 slideEls = document.querySelectorAll('section.slides > article');
|
|
|
587
|
|
|
588 setupFrames();
|
|
|
589
|
|
|
590 addFontStyle();
|
|
|
591 addGeneralStyle();
|
|
|
592 addPrettify();
|
|
|
593 addEventListeners();
|
|
|
594
|
|
|
595 updateSlides();
|
|
|
596
|
|
|
597 setupInteraction();
|
|
|
598 makeBuildLists();
|
|
|
599
|
|
|
600 document.body.classList.add('loaded');
|
|
|
601 };
|
|
|
602
|
|
|
603 function initialize() {
|
|
|
604 getCurSlideFromHash();
|
|
|
605
|
|
|
606 if (window['_DEBUG']) {
|
|
|
607 PERMANENT_URL_PREFIX = '../';
|
|
|
608 }
|
|
|
609
|
|
|
610 if (window['_DCL']) {
|
|
|
611 handleDomLoaded();
|
|
|
612 } else {
|
|
|
613 document.addEventListener('DOMContentLoaded', handleDomLoaded, false);
|
|
|
614 }
|
|
|
615 }
|
|
|
616
|
|
|
617 // If ?debug exists then load the script relative instead of absolute
|
|
|
618 if (!window['_DEBUG'] && document.location.href.indexOf('?debug') !== -1) {
|
|
|
619 document.addEventListener('DOMContentLoaded', function() {
|
|
|
620 // Avoid missing the DomContentLoaded event
|
|
|
621 window['_DCL'] = true
|
|
|
622 }, false);
|
|
|
623
|
|
|
624 window['_DEBUG'] = true;
|
|
|
625 var script = document.createElement('script');
|
|
|
626 script.type = 'text/javascript';
|
|
|
627 script.src = '../slides.js';
|
|
|
628 var s = document.getElementsByTagName('script')[0];
|
|
|
629 s.parentNode.insertBefore(script, s);
|
|
|
630
|
|
|
631 // Remove this script
|
|
|
632 s.parentNode.removeChild(s);
|
|
|
633 } else {
|
|
|
634 initialize();
|
|
|
635 }
|
