1/*! 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Use this feature detection 12 // to determine whether they're available for use. 13 var supportsPassive = false; 14 15 try { 16 var opts = Object.defineProperty( {}, 'passive', { 17 get : function() { 18 supportsPassive = true; 19 } 20 } ); 21 22 window.addEventListener( 'testPassive', null, opts ); 23 window.removeEventListener( 'testPassive', null, opts ); 24 } catch ( e ) {} 25 26 function init() { 27 var input_begin = ''; 28 29 var keydowns = {}; 30 var lastKeyup = null; 31 var lastKeydown = null; 32 var keypresses = []; 33 34 var modifierKeys = []; 35 var correctionKeys = []; 36 37 var lastMouseup = null; 38 var lastMousedown = null; 39 var mouseclicks = []; 40 var mouseclickCoordinates = []; 41 42 var mousemoveTimer = null; 43 var lastMousemoveX = null; 44 var lastMousemoveY = null; 45 var lastMousemoveTime = null; 46 var mousemoveStart = null; 47 var mousemoves = []; 48 var intervalsBetweenMousemovesAndClicks = []; 49 50 var touchmoveCountTimer = null; 51 var touchmoveCount = 0; 52 53 var lastTouchEnd = null; 54 var lastTouchStart = null; 55 var touchEvents = []; 56 57 var scrollCountTimer = null; 58 var scrollCount = 0; 59 60 var correctionKeyCodes = [ 'Backspace', 'Delete', 'ArrowUp', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'Home', 'End', 'PageUp', 'PageDown' ]; 61 var modifierKeyCodes = [ 'Shift', 'CapsLock' ]; 62 63 var forms = document.querySelectorAll( 'form[method=post]' ); 64 65 for ( var i = 0; i < forms.length; i++ ) { 66 var form = forms[i]; 67 68 var formAction = form.getAttribute( 'action' ); 69 70 // Ignore forms that POST directly to other domains; these could be things like payment forms. 71 if ( formAction ) { 72 // Check that the form is posting to an external URL, not a path. 73 if ( formAction.indexOf( 'http://' ) == 0 || formAction.indexOf( 'https://' ) == 0 ) { 74 if ( formAction.indexOf( 'http://' + window.location.hostname + '/' ) != 0 && formAction.indexOf( 'https://' + window.location.hostname + '/' ) != 0 ) { 75 continue; 76 } 77 } 78 } 79 80 form.addEventListener( 'submit', function () { 81 var ak_bkp = prepare_array_for_request( keypresses ); 82 var ak_bmc = prepare_array_for_request( mouseclicks ); 83 var ak_bte = prepare_array_for_request( touchEvents ); 84 var ak_bmm = prepare_array_for_request( mousemoves ); 85 var ak_bcc = prepare_array_for_request( mouseclickCoordinates ); 86 var ak_bibmac = intervalsBetweenMousemovesAndClicks.slice( 0, 100 ).join( ';' ); 87 88 var input_fields = { 89 // When did the user begin entering any input? 90 'bib': input_begin, 91 92 // When was the form submitted? 93 'bfs': Date.now(), 94 95 // How many keypresses did they make? 96 'bkpc': keypresses.length, 97
98 // How quickly did they press a sample of keys, and how long between them? 99 'bkp': ak_bkp, 100 101 // How quickly did they click the mouse, and how long between clicks? 102 'bmc': ak_bmc, 103 104 // How many mouseclicks did they make? 105 'bmcc': mouseclicks.length, 106 107 // When did they press modifier keys (like Shift or Capslock)? 108 'bmk': modifierKeys.join( ';' ), 109 110 // When did they correct themselves? e.g., press Backspace, or use the arrow keys to move the cursor back 111 'bck': correctionKeys.join( ';' ), 112 113 // How many times did they move the mouse? 114 'bmmc': mousemoves.length, 115 116 // How many times did they move around using a touchscreen? 117 'btmc': touchmoveCount, 118 119 // How many times did they scroll? 120 'bsc': scrollCount, 121 122 // How quickly did they perform touch events, and how long between them? 123 'bte': ak_bte, 124 125 // How many touch events were there? 126 'btec' : touchEvents.length, 127 128 // How quickly did they move the mouse, and how long between moves? 129 'bmm' : ak_bmm, 130 131 // Click coordinates 132 'bcc' : ak_bcc, 133 134 // Milliseconds between last mouse movement and each click 135 'bibmac' : ak_bibmac 136 }; 137 138 var akismet_field_prefix = 'ak_'; 139 140 if ( this.getElementsByClassName ) { 141 // Check to see if we've used an alternate field name prefix. We store this as an attribute of the container around some of the Akismet fields. 142 var possible_akismet_containers = this.getElementsByClassName( 'akismet-fields-container' ); 143 144 for ( var containerIndex = 0; containerIndex < possible_akismet_containers.length; containerIndex++ ) { 145 var container = possible_akismet_containers.item( containerIndex ); 146 147 if ( container.getAttribute( 'data-prefix' ) ) { 148 akismet_field_prefix = container.getAttribute( 'data-prefix' ); 149 break; 150 } 151 } 152 } 153 154 for ( var field_name in input_fields ) { 155 var field = document.createElement( 'input' ); 156 field.setAttribute( 'type', 'hidden' ); 157 field.setAttribute( 'name', akismet_field_prefix + field_name ); 158 field.setAttribute( 'value', input_fields[ field_name ] ); 159 this.appendChild( field ); 160 } 161 }, supportsPassive ? { passive: true } : false ); 162 163 form.addEventListener( 'keydown', function ( e ) { 164 // If you hold a key down, some browsers send multiple keydown events in a row. 165 // Ignore any keydown events for a key that hasn't come back up yet. 166 if ( e.key in keydowns ) { 167 return; 168 } 169 170 var keydownTime = ( new Date() ).getTime(); 171 keydowns[ e.key ] = [ keydownTime ]; 172 173 if ( ! input_begin ) { 174 input_begin = keydownTime; 175 } 176 177 // In some situations, we don't want to record an interval since the last keypress -- for example, 178 // on the first keypress, or on a keypress after focus has changed to another element. Normally, 179 // we want to record the time between the last keyup and this keydown. But if they press a 180 // key while already pressing a key, we want to record the time between the two keydowns. 181 182 var lastKeyEvent = Math.max( lastKeydown, lastKeyup ); 183 184 if ( lastKeyEvent ) { 185 keydowns[ e.key ].push( keydownTime - lastKeyEvent ); 186 } 187 188 lastKeydown = keydownTime; 189 }, supportsPassive ? { passive: true } : false ); 190 191 form.addEventListener( 'keyup', function ( e ) { 192 if ( ! ( e.key in keydowns ) ) { 193 // This key was pressed before this script was loaded, or a mouseclick happened during the keypress, or... 194 return; 195 } 196 197 var keyupTime = ( new Date() ).getTime(); 198 199 if ( 'TEXTAREA' === e.target.nodeName || 'INPUT' === e.target.nodeName ) { 200 if ( -1 !== modifierKeyCodes.indexOf( e.key ) ) { 201 modifierKeys.push( keypresses.length - 1 ); 202 } else if ( -1 !== correctionKeyCodes.indexOf( e.key ) ) { 203 correctionKeys.push( keypresses.length - 1 ); 204 } else { 205 // ^ Don't record timings for keys like Shift or backspace, since they 206 // typically get held down for longer than regular typing. 207 208 var keydownTime = keydowns[ e.key ][0]; 209 210 var keypress = []; 211 212 // Keypress duration. 213 keypress.push( keyupTime - keydownTime ); 214 215 // Amount of time between this keypress and the previous keypress. 216 if ( keydowns[ e.key ].length > 1 ) { 217 keypress.push( keydowns[ e.key ][1] ); 218 } 219 220 keypresses.push( keypress ); 221 } 222 } 223
224 delete keydowns[ e.key ]; 225 226 lastKeyup = keyupTime; 227 }, supportsPassive ? { passive: true } : false ); 228 229 form.addEventListener( "focusin", function ( e ) { 230 lastKeydown = null; 231 lastKeyup = null; 232 keydowns = {}; 233 }, supportsPassive ? { passive: true } : false ); 234 235 form.addEventListener( "focusout", function ( e ) { 236 lastKeydown = null; 237 lastKeyup = null; 238 keydowns = {}; 239 }, supportsPassive ? { passive: true } : false ); 240 } 241 242 document.addEventListener( 'mousedown', function ( e ) { 243 lastMousedown = ( new Date() ).getTime(); 244 245 if ( lastMousemoveTime ) { 246 intervalsBetweenMousemovesAndClicks.push( lastMousedown - lastMousemoveTime ); 247 } 248 249 var mouseclickCoordinate = []; 250 251 var rect = e.target.getBoundingClientRect(); 252 var relativeX = e.clientX - rect.left; 253 var relativeY = e.clientY - rect.top; 254 255 // Pixel offset of the click within the target element. 256 mouseclickCoordinate.push( Math.round( relativeX ) ); 257 mouseclickCoordinate.push( Math.round( relativeY ) ); 258 259 // Percentage offset of the click within the target element. 260 mouseclickCoordinate.push( rect.width > 0 ? Math.round( relativeX / rect.width * 100 ) : 0 ); 261 mouseclickCoordinate.push( rect.height > 0 ? Math.round( relativeY / rect.height * 100 ) : 0 ); 262 263 mouseclickCoordinates.push( mouseclickCoordinate ); 264 }, supportsPassive ? { passive: true } : false ); 265 266 document.addEventListener( 'mouseup', function ( e ) { 267 if ( ! lastMousedown ) { 268 // If the mousedown happened before this script was loaded, but the mouseup happened after... 269 return; 270 } 271 272 var now = ( new Date() ).getTime(); 273 274 var mouseclick = []; 275 mouseclick.push( now - lastMousedown ); 276 277 if ( lastMouseup ) { 278 mouseclick.push( lastMousedown - lastMouseup ); 279 } 280 281 mouseclicks.push( mouseclick ); 282 283 lastMouseup = now; 284 285 // If the mouse has been clicked, don't record this time as an interval between keypresses. 286 lastKeydown = null; 287 lastKeyup = null; 288 keydowns = {}; 289 }, supportsPassive ? { passive: true } : false ); 290 291 document.addEventListener( 'mousemove', function ( e ) { 292 lastMousemoveTime = ( new Date() ).getTime(); 293 294 if ( mousemoveTimer ) { 295 clearTimeout( mousemoveTimer ); 296 mousemoveTimer = null; 297 } 298 else { 299 mousemoveStart = lastMousemoveTime; 300 lastMousemoveX = e.offsetX; 301 lastMousemoveY = e.offsetY; 302 } 303 304 mousemoveTimer = setTimeout( function ( theEvent, originalMousemoveStart ) { 305 var now = ( new Date() ).getTime() - 500; // To account for the timer delay. 306 307 var mousemove = []; 308 mousemove.push( now - originalMousemoveStart ); 309 mousemove.push( 310 Math.round( 311 Math.sqrt( 312 Math.pow( theEvent.offsetX - lastMousemoveX, 2 ) + 313 Math.pow( theEvent.offsetY - lastMousemoveY, 2 ) 314 ) 315 ) 316 ); 317 318 if ( mousemove[1] > 0 ) { 319 // If there was no measurable distance, then it wasn't really a move. 320 mousemoves.push( mousemove ); 321 } 322 323 mousemoveStart = null; 324 mousemoveTimer = null; 325 }, 500, e, mousemoveStart ); 326 }, supportsPassive ? { passive: true } : false ); 327 328 document.addEventListener( 'touchmove', function ( e ) { 329 if ( touchmoveCountTimer ) { 330 clearTimeout( touchmoveCountTimer ); 331 } 332 333 touchmoveCountTimer = setTimeout( function () { 334 touchmoveCount++; 335 }, 500 ); 336 }, supportsPassive ? { passive: true } : false ); 337 338 document.addEventListener( 'touchstart', function ( e ) { 339 lastTouchStart = ( new Date() ).getTime(); 340 }, supportsPassive ? { passive: true } : false ); 341 342 document.addEventListener( 'touchend', function ( e ) { 343 if ( ! lastTouchStart ) { 344 // If the touchstart happened before this script was loaded, but the touchend happened after... 345 return; 346 } 347 348 var now = ( new Date() ).getTime(); 349 350 var touchEvent = []; 351 touchEvent.push( now - lastTouchStart ); 352 353 if ( lastTouchEnd ) { 354 touchEvent.push( lastTouchStart - lastTouchEnd ); 355 } 356 357 touchEvents.push( touchEvent ); 358 359 lastTouchEnd = now; 360 361 // Don't record this time as an interval between keypresses. 362 lastKeydown = null; 363 lastKeyup = null; 364 keydowns = {}; 365 }, supportsPassive ? { passive: true } : false ); 366 367 document.addEventListener( 'scroll', function ( e ) {
368 if ( scrollCountTimer ) { 369 clearTimeout( scrollCountTimer ); 370 } 371 372 scrollCountTimer = setTimeout( function () { 373 scrollCount++; 374 }, 500 ); 375 }, supportsPassive ? { passive: true } : false ); 376 } 377 378 /** 379 * For the timing/coordinate data that is collected, don't send more than `limit` data points in the request. 380 * Choose a random slice and send those, with each batch separated by semicolons and the items in each batch 381 * separated by commas. 382 */ 383 function prepare_array_for_request( a, limit ) { 384 if ( ! limit ) { 385 limit = 100; 386 } 387 388 var rv = ''; 389 390 if ( a.length > 0 ) { 391 var random_starting_point = Math.max( 0, Math.floor( Math.random() * a.length - limit ) ); 392 393 for ( var i = 0; i < limit && i < a.length; i++ ) { 394 var entry = a[ random_starting_point + i ]; 395 rv += entry.join( ',' ) + ';'; 396 } 397 } 398 399 return rv; 400 } 401 402 if ( document.readyState !== 'loading' ) { 403 init(); 404 } else { 405 document.addEventListener( 'DOMContentLoaded', init ); 406 } 407})();;
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