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