LICENSE
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README.md
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infinite-scroll.pkgd.js
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infinite-scroll.pkgd.min.js
4 years ago
infinite-scroll.pkgd.js
1910 lines
| 1 | /*! |
| 2 | * Infinite Scroll PACKAGED v4.0.1 |
| 3 | * Automatically add next page |
| 4 | * |
| 5 | * Licensed GPLv3 for open source use |
| 6 | * or Infinite Scroll Commercial License for commercial use |
| 7 | * |
| 8 | * https://infinite-scroll.com |
| 9 | * Copyright 2018-2020 Metafizzy |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * Bridget makes jQuery widgets |
| 14 | * v3.0.0 |
| 15 | * MIT license |
| 16 | */ |
| 17 | |
| 18 | ( function( window, factory ) { |
| 19 | // module definition |
| 20 | if ( typeof module == 'object' && module.exports ) { |
| 21 | // CommonJS |
| 22 | module.exports = factory( |
| 23 | window, |
| 24 | require('jquery'), |
| 25 | ); |
| 26 | } else { |
| 27 | // browser global |
| 28 | window.jQueryBridget = factory( |
| 29 | window, |
| 30 | window.jQuery, |
| 31 | ); |
| 32 | } |
| 33 | |
| 34 | }( window, function factory( window, jQuery ) { |
| 35 | |
| 36 | // ----- utils ----- // |
| 37 | |
| 38 | // helper function for logging errors |
| 39 | // $.error breaks jQuery chaining |
| 40 | let console = window.console; |
| 41 | let logError = typeof console == 'undefined' ? function() {} : |
| 42 | function( message ) { |
| 43 | console.error( message ); |
| 44 | }; |
| 45 | |
| 46 | // ----- jQueryBridget ----- // |
| 47 | |
| 48 | function jQueryBridget( namespace, PluginClass, $ ) { |
| 49 | $ = $ || jQuery || window.jQuery; |
| 50 | if ( !$ ) { |
| 51 | return; |
| 52 | } |
| 53 | |
| 54 | // add option method -> $().plugin('option', {...}) |
| 55 | if ( !PluginClass.prototype.option ) { |
| 56 | // option setter |
| 57 | PluginClass.prototype.option = function( opts ) { |
| 58 | if ( !opts ) return; |
| 59 | |
| 60 | this.options = Object.assign( this.options || {}, opts ); |
| 61 | }; |
| 62 | } |
| 63 | |
| 64 | // make jQuery plugin |
| 65 | $.fn[ namespace ] = function( arg0, ...args ) { |
| 66 | if ( typeof arg0 == 'string' ) { |
| 67 | // method call $().plugin( 'methodName', { options } ) |
| 68 | return methodCall( this, arg0, args ); |
| 69 | } |
| 70 | // just $().plugin({ options }) |
| 71 | plainCall( this, arg0 ); |
| 72 | return this; |
| 73 | }; |
| 74 | |
| 75 | // $().plugin('methodName') |
| 76 | function methodCall( $elems, methodName, args ) { |
| 77 | let returnValue; |
| 78 | let pluginMethodStr = `$().${namespace}("${methodName}")`; |
| 79 | |
| 80 | $elems.each( function( i, elem ) { |
| 81 | // get instance |
| 82 | let instance = $.data( elem, namespace ); |
| 83 | if ( !instance ) { |
| 84 | logError( `${namespace} not initialized.` + |
| 85 | ` Cannot call method ${pluginMethodStr}` ); |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | let method = instance[ methodName ]; |
| 90 | if ( !method || methodName.charAt( 0 ) == '_' ) { |
| 91 | logError(`${pluginMethodStr} is not a valid method`); |
| 92 | return; |
| 93 | } |
| 94 | |
| 95 | // apply method, get return value |
| 96 | let value = method.apply( instance, args ); |
| 97 | // set return value if value is returned, use only first value |
| 98 | returnValue = returnValue === undefined ? value : returnValue; |
| 99 | } ); |
| 100 | |
| 101 | return returnValue !== undefined ? returnValue : $elems; |
| 102 | } |
| 103 | |
| 104 | function plainCall( $elems, options ) { |
| 105 | $elems.each( function( i, elem ) { |
| 106 | let instance = $.data( elem, namespace ); |
| 107 | if ( instance ) { |
| 108 | // set options & init |
| 109 | instance.option( options ); |
| 110 | instance._init(); |
| 111 | } else { |
| 112 | // initialize new instance |
| 113 | instance = new PluginClass( elem, options ); |
| 114 | $.data( elem, namespace, instance ); |
| 115 | } |
| 116 | } ); |
| 117 | } |
| 118 | |
| 119 | } |
| 120 | |
| 121 | // ----- ----- // |
| 122 | |
| 123 | return jQueryBridget; |
| 124 | |
| 125 | } ) ); |
| 126 | /** |
| 127 | * EvEmitter v2.0.0 |
| 128 | * Lil' event emitter |
| 129 | * MIT License |
| 130 | */ |
| 131 | |
| 132 | ( function( global, factory ) { |
| 133 | // universal module definition |
| 134 | if ( typeof module == 'object' && module.exports ) { |
| 135 | // CommonJS - Browserify, Webpack |
| 136 | module.exports = factory(); |
| 137 | } else { |
| 138 | // Browser globals |
| 139 | global.EvEmitter = factory(); |
| 140 | } |
| 141 | |
| 142 | }( typeof window != 'undefined' ? window : this, function() { |
| 143 | |
| 144 | function EvEmitter() {} |
| 145 | |
| 146 | let proto = EvEmitter.prototype; |
| 147 | |
| 148 | proto.on = function( eventName, listener ) { |
| 149 | if ( !eventName || !listener ) return this; |
| 150 | |
| 151 | // set events hash |
| 152 | let events = this._events = this._events || {}; |
| 153 | // set listeners array |
| 154 | let listeners = events[ eventName ] = events[ eventName ] || []; |
| 155 | // only add once |
| 156 | if ( !listeners.includes( listener ) ) { |
| 157 | listeners.push( listener ); |
| 158 | } |
| 159 | |
| 160 | return this; |
| 161 | }; |
| 162 | |
| 163 | proto.once = function( eventName, listener ) { |
| 164 | if ( !eventName || !listener ) return this; |
| 165 | |
| 166 | // add event |
| 167 | this.on( eventName, listener ); |
| 168 | // set once flag |
| 169 | // set onceEvents hash |
| 170 | let onceEvents = this._onceEvents = this._onceEvents || {}; |
| 171 | // set onceListeners object |
| 172 | let onceListeners = onceEvents[ eventName ] = onceEvents[ eventName ] || {}; |
| 173 | // set flag |
| 174 | onceListeners[ listener ] = true; |
| 175 | |
| 176 | return this; |
| 177 | }; |
| 178 | |
| 179 | proto.off = function( eventName, listener ) { |
| 180 | let listeners = this._events && this._events[ eventName ]; |
| 181 | if ( !listeners || !listeners.length ) return this; |
| 182 | |
| 183 | let index = listeners.indexOf( listener ); |
| 184 | if ( index != -1 ) { |
| 185 | listeners.splice( index, 1 ); |
| 186 | } |
| 187 | |
| 188 | return this; |
| 189 | }; |
| 190 | |
| 191 | proto.emitEvent = function( eventName, args ) { |
| 192 | let listeners = this._events && this._events[ eventName ]; |
| 193 | if ( !listeners || !listeners.length ) return this; |
| 194 | |
| 195 | // copy over to avoid interference if .off() in listener |
| 196 | listeners = listeners.slice( 0 ); |
| 197 | args = args || []; |
| 198 | // once stuff |
| 199 | let onceListeners = this._onceEvents && this._onceEvents[ eventName ]; |
| 200 | |
| 201 | for ( let listener of listeners ) { |
| 202 | let isOnce = onceListeners && onceListeners[ listener ]; |
| 203 | if ( isOnce ) { |
| 204 | // remove listener |
| 205 | // remove before trigger to prevent recursion |
| 206 | this.off( eventName, listener ); |
| 207 | // unset once flag |
| 208 | delete onceListeners[ listener ]; |
| 209 | } |
| 210 | // trigger listener |
| 211 | listener.apply( this, args ); |
| 212 | } |
| 213 | |
| 214 | return this; |
| 215 | }; |
| 216 | |
| 217 | proto.allOff = function() { |
| 218 | delete this._events; |
| 219 | delete this._onceEvents; |
| 220 | return this; |
| 221 | }; |
| 222 | |
| 223 | return EvEmitter; |
| 224 | |
| 225 | } ) ); |
| 226 | /** |
| 227 | * Fizzy UI utils v3.0.0 |
| 228 | * MIT license |
| 229 | */ |
| 230 | |
| 231 | ( function( global, factory ) { |
| 232 | // universal module definition |
| 233 | if ( typeof module == 'object' && module.exports ) { |
| 234 | // CommonJS |
| 235 | module.exports = factory( global ); |
| 236 | } else { |
| 237 | // browser global |
| 238 | global.fizzyUIUtils = factory( global ); |
| 239 | } |
| 240 | |
| 241 | }( this, function factory( global ) { |
| 242 | |
| 243 | let utils = {}; |
| 244 | |
| 245 | // ----- extend ----- // |
| 246 | |
| 247 | // extends objects |
| 248 | utils.extend = function( a, b ) { |
| 249 | return Object.assign( a, b ); |
| 250 | }; |
| 251 | |
| 252 | // ----- modulo ----- // |
| 253 | |
| 254 | utils.modulo = function( num, div ) { |
| 255 | return ( ( num % div ) + div ) % div; |
| 256 | }; |
| 257 | |
| 258 | // ----- makeArray ----- // |
| 259 | |
| 260 | // turn element or nodeList into an array |
| 261 | utils.makeArray = function( obj ) { |
| 262 | // use object if already an array |
| 263 | if ( Array.isArray( obj ) ) return obj; |
| 264 | |
| 265 | // return empty array if undefined or null. #6 |
| 266 | if ( obj === null || obj === undefined ) return []; |
| 267 | |
| 268 | let isArrayLike = typeof obj == 'object' && typeof obj.length == 'number'; |
| 269 | // convert nodeList to array |
| 270 | if ( isArrayLike ) return [ ...obj ]; |
| 271 | |
| 272 | // array of single index |
| 273 | return [ obj ]; |
| 274 | }; |
| 275 | |
| 276 | // ----- removeFrom ----- // |
| 277 | |
| 278 | utils.removeFrom = function( ary, obj ) { |
| 279 | let index = ary.indexOf( obj ); |
| 280 | if ( index != -1 ) { |
| 281 | ary.splice( index, 1 ); |
| 282 | } |
| 283 | }; |
| 284 | |
| 285 | // ----- getParent ----- // |
| 286 | |
| 287 | utils.getParent = function( elem, selector ) { |
| 288 | while ( elem.parentNode && elem != document.body ) { |
| 289 | elem = elem.parentNode; |
| 290 | if ( elem.matches( selector ) ) return elem; |
| 291 | } |
| 292 | }; |
| 293 | |
| 294 | // ----- getQueryElement ----- // |
| 295 | |
| 296 | // use element as selector string |
| 297 | utils.getQueryElement = function( elem ) { |
| 298 | if ( typeof elem == 'string' ) { |
| 299 | return document.querySelector( elem ); |
| 300 | } |
| 301 | return elem; |
| 302 | }; |
| 303 | |
| 304 | // ----- handleEvent ----- // |
| 305 | |
| 306 | // enable .ontype to trigger from .addEventListener( elem, 'type' ) |
| 307 | utils.handleEvent = function( event ) { |
| 308 | let method = 'on' + event.type; |
| 309 | if ( this[ method ] ) { |
| 310 | this[ method ]( event ); |
| 311 | } |
| 312 | }; |
| 313 | |
| 314 | // ----- filterFindElements ----- // |
| 315 | |
| 316 | utils.filterFindElements = function( elems, selector ) { |
| 317 | // make array of elems |
| 318 | elems = utils.makeArray( elems ); |
| 319 | |
| 320 | return elems |
| 321 | // check that elem is an actual element |
| 322 | .filter( ( elem ) => elem instanceof HTMLElement ) |
| 323 | .reduce( ( ffElems, elem ) => { |
| 324 | // add elem if no selector |
| 325 | if ( !selector ) { |
| 326 | ffElems.push( elem ); |
| 327 | return ffElems; |
| 328 | } |
| 329 | // filter & find items if we have a selector |
| 330 | // filter |
| 331 | if ( elem.matches( selector ) ) { |
| 332 | ffElems.push( elem ); |
| 333 | } |
| 334 | // find children |
| 335 | let childElems = elem.querySelectorAll( selector ); |
| 336 | // concat childElems to filterFound array |
| 337 | ffElems = ffElems.concat( ...childElems ); |
| 338 | return ffElems; |
| 339 | }, [] ); |
| 340 | }; |
| 341 | |
| 342 | // ----- debounceMethod ----- // |
| 343 | |
| 344 | utils.debounceMethod = function( _class, methodName, threshold ) { |
| 345 | threshold = threshold || 100; |
| 346 | // original method |
| 347 | let method = _class.prototype[ methodName ]; |
| 348 | let timeoutName = methodName + 'Timeout'; |
| 349 | |
| 350 | _class.prototype[ methodName ] = function() { |
| 351 | clearTimeout( this[ timeoutName ] ); |
| 352 | |
| 353 | let args = arguments; |
| 354 | this[ timeoutName ] = setTimeout( () => { |
| 355 | method.apply( this, args ); |
| 356 | delete this[ timeoutName ]; |
| 357 | }, threshold ); |
| 358 | }; |
| 359 | }; |
| 360 | |
| 361 | // ----- docReady ----- // |
| 362 | |
| 363 | utils.docReady = function( onDocReady ) { |
| 364 | let readyState = document.readyState; |
| 365 | if ( readyState == 'complete' || readyState == 'interactive' ) { |
| 366 | // do async to allow for other scripts to run. metafizzy/flickity#441 |
| 367 | setTimeout( onDocReady ); |
| 368 | } else { |
| 369 | document.addEventListener( 'DOMContentLoaded', onDocReady ); |
| 370 | } |
| 371 | }; |
| 372 | |
| 373 | // ----- htmlInit ----- // |
| 374 | |
| 375 | // http://bit.ly/3oYLusc |
| 376 | utils.toDashed = function( str ) { |
| 377 | return str.replace( /(.)([A-Z])/g, function( match, $1, $2 ) { |
| 378 | return $1 + '-' + $2; |
| 379 | } ).toLowerCase(); |
| 380 | }; |
| 381 | |
| 382 | let console = global.console; |
| 383 | |
| 384 | // allow user to initialize classes via [data-namespace] or .js-namespace class |
| 385 | // htmlInit( Widget, 'widgetName' ) |
| 386 | // options are parsed from data-namespace-options |
| 387 | utils.htmlInit = function( WidgetClass, namespace ) { |
| 388 | utils.docReady( function() { |
| 389 | let dashedNamespace = utils.toDashed( namespace ); |
| 390 | let dataAttr = 'data-' + dashedNamespace; |
| 391 | let dataAttrElems = document.querySelectorAll( `[${dataAttr}]` ); |
| 392 | let jQuery = global.jQuery; |
| 393 | |
| 394 | [ ...dataAttrElems ].forEach( ( elem ) => { |
| 395 | let attr = elem.getAttribute( dataAttr ); |
| 396 | let options; |
| 397 | try { |
| 398 | options = attr && JSON.parse( attr ); |
| 399 | } catch ( error ) { |
| 400 | // log error, do not initialize |
| 401 | if ( console ) { |
| 402 | console.error( `Error parsing ${dataAttr} on ${elem.className}: ${error}` ); |
| 403 | } |
| 404 | return; |
| 405 | } |
| 406 | // initialize |
| 407 | let instance = new WidgetClass( elem, options ); |
| 408 | // make available via $().data('namespace') |
| 409 | if ( jQuery ) { |
| 410 | jQuery.data( elem, namespace, instance ); |
| 411 | } |
| 412 | } ); |
| 413 | |
| 414 | } ); |
| 415 | }; |
| 416 | |
| 417 | // ----- ----- // |
| 418 | |
| 419 | return utils; |
| 420 | |
| 421 | } ) ); |
| 422 | // core |
| 423 | ( function( window, factory ) { |
| 424 | // universal module definition |
| 425 | if ( typeof module == 'object' && module.exports ) { |
| 426 | // CommonJS |
| 427 | module.exports = factory( |
| 428 | window, |
| 429 | require('ev-emitter'), |
| 430 | require('fizzy-ui-utils'), |
| 431 | ); |
| 432 | } else { |
| 433 | // browser global |
| 434 | window.InfiniteScroll = factory( |
| 435 | window, |
| 436 | window.EvEmitter, |
| 437 | window.fizzyUIUtils, |
| 438 | ); |
| 439 | } |
| 440 | |
| 441 | }( window, function factory( window, EvEmitter, utils ) { |
| 442 | |
| 443 | let jQuery = window.jQuery; |
| 444 | // internal store of all InfiniteScroll intances |
| 445 | let instances = {}; |
| 446 | |
| 447 | function InfiniteScroll( element, options ) { |
| 448 | let queryElem = utils.getQueryElement( element ); |
| 449 | |
| 450 | if ( !queryElem ) { |
| 451 | console.error( 'Bad element for InfiniteScroll: ' + ( queryElem || element ) ); |
| 452 | return; |
| 453 | } |
| 454 | element = queryElem; |
| 455 | // do not initialize twice on same element |
| 456 | if ( element.infiniteScrollGUID ) { |
| 457 | let instance = instances[ element.infiniteScrollGUID ]; |
| 458 | instance.option( options ); |
| 459 | return instance; |
| 460 | } |
| 461 | |
| 462 | this.element = element; |
| 463 | // options |
| 464 | this.options = { ...InfiniteScroll.defaults }; |
| 465 | this.option( options ); |
| 466 | // add jQuery |
| 467 | if ( jQuery ) { |
| 468 | this.$element = jQuery( this.element ); |
| 469 | } |
| 470 | |
| 471 | this.create(); |
| 472 | } |
| 473 | |
| 474 | // defaults |
| 475 | InfiniteScroll.defaults = { |
| 476 | // path: null, |
| 477 | // hideNav: null, |
| 478 | // debug: false, |
| 479 | }; |
| 480 | |
| 481 | // create & destroy methods |
| 482 | InfiniteScroll.create = {}; |
| 483 | InfiniteScroll.destroy = {}; |
| 484 | |
| 485 | let proto = InfiniteScroll.prototype; |
| 486 | // inherit EvEmitter |
| 487 | Object.assign( proto, EvEmitter.prototype ); |
| 488 | |
| 489 | // -------------------------- -------------------------- // |
| 490 | |
| 491 | // globally unique identifiers |
| 492 | let GUID = 0; |
| 493 | |
| 494 | proto.create = function() { |
| 495 | // create core |
| 496 | // add id for InfiniteScroll.data |
| 497 | let id = this.guid = ++GUID; |
| 498 | this.element.infiniteScrollGUID = id; // expando |
| 499 | instances[ id ] = this; // associate via id |
| 500 | // properties |
| 501 | this.pageIndex = 1; // default to first page |
| 502 | this.loadCount = 0; |
| 503 | this.updateGetPath(); |
| 504 | // bail if getPath not set, or returns falsey #776 |
| 505 | let hasPath = this.getPath && this.getPath(); |
| 506 | if ( !hasPath ) { |
| 507 | console.error('Disabling InfiniteScroll'); |
| 508 | return; |
| 509 | } |
| 510 | this.updateGetAbsolutePath(); |
| 511 | this.log( 'initialized', [ this.element.className ] ); |
| 512 | this.callOnInit(); |
| 513 | // create features |
| 514 | for ( let method in InfiniteScroll.create ) { |
| 515 | InfiniteScroll.create[ method ].call( this ); |
| 516 | } |
| 517 | }; |
| 518 | |
| 519 | proto.option = function( opts ) { |
| 520 | Object.assign( this.options, opts ); |
| 521 | }; |
| 522 | |
| 523 | // call onInit option, used for binding events on init |
| 524 | proto.callOnInit = function() { |
| 525 | let onInit = this.options.onInit; |
| 526 | if ( onInit ) { |
| 527 | onInit.call( this, this ); |
| 528 | } |
| 529 | }; |
| 530 | |
| 531 | // ----- events ----- // |
| 532 | |
| 533 | proto.dispatchEvent = function( type, event, args ) { |
| 534 | this.log( type, args ); |
| 535 | let emitArgs = event ? [ event ].concat( args ) : args; |
| 536 | this.emitEvent( type, emitArgs ); |
| 537 | // trigger jQuery event |
| 538 | if ( !jQuery || !this.$element ) { |
| 539 | return; |
| 540 | } |
| 541 | // namespace jQuery event |
| 542 | type += '.infiniteScroll'; |
| 543 | let $event = type; |
| 544 | if ( event ) { |
| 545 | // create jQuery event |
| 546 | /* eslint-disable-next-line new-cap */ |
| 547 | let jQEvent = jQuery.Event( event ); |
| 548 | jQEvent.type = type; |
| 549 | $event = jQEvent; |
| 550 | } |
| 551 | this.$element.trigger( $event, args ); |
| 552 | }; |
| 553 | |
| 554 | let loggers = { |
| 555 | initialized: ( className ) => `on ${className}`, |
| 556 | request: ( path ) => `URL: ${path}`, |
| 557 | load: ( response, path ) => `${response.title || ''}. URL: ${path}`, |
| 558 | error: ( error, path ) => `${error}. URL: ${path}`, |
| 559 | append: ( response, path, items ) => `${items.length} items. URL: ${path}`, |
| 560 | last: ( response, path ) => `URL: ${path}`, |
| 561 | history: ( title, path ) => `URL: ${path}`, |
| 562 | pageIndex: function( index, origin ) { |
| 563 | return `current page determined to be: ${index} from ${origin}`; |
| 564 | }, |
| 565 | }; |
| 566 | |
| 567 | // log events |
| 568 | proto.log = function( type, args ) { |
| 569 | if ( !this.options.debug ) return; |
| 570 | |
| 571 | let message = `[InfiniteScroll] ${type}`; |
| 572 | let logger = loggers[ type ]; |
| 573 | if ( logger ) message += '. ' + logger.apply( this, args ); |
| 574 | console.log( message ); |
| 575 | }; |
| 576 | |
| 577 | // -------------------------- methods used amoung features -------------------------- // |
| 578 | |
| 579 | proto.updateMeasurements = function() { |
| 580 | this.windowHeight = window.innerHeight; |
| 581 | let rect = this.element.getBoundingClientRect(); |
| 582 | this.top = rect.top + window.scrollY; |
| 583 | }; |
| 584 | |
| 585 | proto.updateScroller = function() { |
| 586 | let elementScroll = this.options.elementScroll; |
| 587 | if ( !elementScroll ) { |
| 588 | // default, use window |
| 589 | this.scroller = window; |
| 590 | return; |
| 591 | } |
| 592 | // if true, set to element, otherwise use option |
| 593 | this.scroller = elementScroll === true ? this.element : |
| 594 | utils.getQueryElement( elementScroll ); |
| 595 | if ( !this.scroller ) { |
| 596 | throw new Error(`Unable to find elementScroll: ${elementScroll}`); |
| 597 | } |
| 598 | }; |
| 599 | |
| 600 | // -------------------------- page path -------------------------- // |
| 601 | |
| 602 | proto.updateGetPath = function() { |
| 603 | let optPath = this.options.path; |
| 604 | if ( !optPath ) { |
| 605 | console.error(`InfiniteScroll path option required. Set as: ${optPath}`); |
| 606 | return; |
| 607 | } |
| 608 | // function |
| 609 | let type = typeof optPath; |
| 610 | if ( type == 'function' ) { |
| 611 | this.getPath = optPath; |
| 612 | return; |
| 613 | } |
| 614 | // template string: '/pages/{{#}}.html' |
| 615 | let templateMatch = type == 'string' && optPath.match('{{#}}'); |
| 616 | if ( templateMatch ) { |
| 617 | this.updateGetPathTemplate( optPath ); |
| 618 | return; |
| 619 | } |
| 620 | // selector: '.next-page-selector' |
| 621 | this.updateGetPathSelector( optPath ); |
| 622 | }; |
| 623 | |
| 624 | proto.updateGetPathTemplate = function( optPath ) { |
| 625 | // set getPath with template string |
| 626 | this.getPath = () => { |
| 627 | let nextIndex = this.pageIndex + 1; |
| 628 | return optPath.replace( '{{#}}', nextIndex ); |
| 629 | }; |
| 630 | // get pageIndex from location |
| 631 | // convert path option into regex to look for pattern in location |
| 632 | // escape query (?) in url, allows for parsing GET parameters |
| 633 | let regexString = optPath |
| 634 | .replace( /(\\\?|\?)/, '\\?' ) |
| 635 | .replace( '{{#}}', '(\\d\\d?\\d?)' ); |
| 636 | let templateRe = new RegExp( regexString ); |
| 637 | let match = location.href.match( templateRe ); |
| 638 | |
| 639 | if ( match ) { |
| 640 | this.pageIndex = parseInt( match[1], 10 ); |
| 641 | this.log( 'pageIndex', [ this.pageIndex, 'template string' ] ); |
| 642 | } |
| 643 | }; |
| 644 | |
| 645 | let pathRegexes = [ |
| 646 | // WordPress & Tumblr - example.com/page/2 |
| 647 | // Jekyll - example.com/page2 |
| 648 | /^(.*?\/?page\/?)(\d\d?\d?)(.*?$)/, |
| 649 | // Drupal - example.com/?page=1 |
| 650 | /^(.*?\/?\?page=)(\d\d?\d?)(.*?$)/, |
| 651 | // catch all, last occurence of a number |
| 652 | /(.*?)(\d\d?\d?)(?!.*\d)(.*?$)/, |
| 653 | ]; |
| 654 | |
| 655 | // try matching href to pathRegexes patterns |
| 656 | let getPathParts = InfiniteScroll.getPathParts = function( href ) { |
| 657 | if ( !href ) return; |
| 658 | for ( let regex of pathRegexes ) { |
| 659 | let match = href.match( regex ); |
| 660 | if ( match ) { |
| 661 | let [ , begin, index, end ] = match; |
| 662 | return { begin, index, end }; |
| 663 | } |
| 664 | } |
| 665 | }; |
| 666 | |
| 667 | proto.updateGetPathSelector = function( optPath ) { |
| 668 | // parse href of link: '.next-page-link' |
| 669 | let hrefElem = document.querySelector( optPath ); |
| 670 | if ( !hrefElem ) { |
| 671 | console.error(`Bad InfiniteScroll path option. Next link not found: ${optPath}`); |
| 672 | return; |
| 673 | } |
| 674 | |
| 675 | let href = hrefElem.getAttribute('href'); |
| 676 | let pathParts = getPathParts( href ); |
| 677 | if ( !pathParts ) { |
| 678 | console.error(`InfiniteScroll unable to parse next link href: ${href}`); |
| 679 | return; |
| 680 | } |
| 681 | |
| 682 | let { begin, index, end } = pathParts; |
| 683 | this.isPathSelector = true; // flag for checkLastPage() |
| 684 | this.getPath = () => begin + ( this.pageIndex + 1 ) + end; |
| 685 | // get pageIndex from href |
| 686 | this.pageIndex = parseInt( index, 10 ) - 1; |
| 687 | this.log( 'pageIndex', [ this.pageIndex, 'next link' ] ); |
| 688 | }; |
| 689 | |
| 690 | proto.updateGetAbsolutePath = function() { |
| 691 | let path = this.getPath(); |
| 692 | // path doesn't start with http or / |
| 693 | let isAbsolute = path.match( /^http/ ) || path.match( /^\// ); |
| 694 | if ( isAbsolute ) { |
| 695 | this.getAbsolutePath = this.getPath; |
| 696 | return; |
| 697 | } |
| 698 | |
| 699 | let { pathname } = location; |
| 700 | // query parameter #829. example.com/?pg=2 |
| 701 | let isQuery = path.match( /^\?/ ); |
| 702 | // /foo/bar/index.html => /foo/bar |
| 703 | let directory = pathname.substring( 0, pathname.lastIndexOf('/') ); |
| 704 | let pathStart = isQuery ? pathname : directory + '/'; |
| 705 | |
| 706 | this.getAbsolutePath = () => pathStart + this.getPath(); |
| 707 | }; |
| 708 | |
| 709 | // -------------------------- nav -------------------------- // |
| 710 | |
| 711 | // hide navigation |
| 712 | InfiniteScroll.create.hideNav = function() { |
| 713 | let nav = utils.getQueryElement( this.options.hideNav ); |
| 714 | if ( !nav ) return; |
| 715 | |
| 716 | nav.style.display = 'none'; |
| 717 | this.nav = nav; |
| 718 | }; |
| 719 | |
| 720 | InfiniteScroll.destroy.hideNav = function() { |
| 721 | if ( this.nav ) this.nav.style.display = ''; |
| 722 | }; |
| 723 | |
| 724 | // -------------------------- destroy -------------------------- // |
| 725 | |
| 726 | proto.destroy = function() { |
| 727 | this.allOff(); // remove all event listeners |
| 728 | // call destroy methods |
| 729 | for ( let method in InfiniteScroll.destroy ) { |
| 730 | InfiniteScroll.destroy[ method ].call( this ); |
| 731 | } |
| 732 | |
| 733 | delete this.element.infiniteScrollGUID; |
| 734 | delete instances[ this.guid ]; |
| 735 | // remove jQuery data. #807 |
| 736 | if ( jQuery && this.$element ) { |
| 737 | jQuery.removeData( this.element, 'infiniteScroll' ); |
| 738 | } |
| 739 | }; |
| 740 | |
| 741 | // -------------------------- utilities -------------------------- // |
| 742 | |
| 743 | // https://remysharp.com/2010/07/21/throttling-function-calls |
| 744 | InfiniteScroll.throttle = function( fn, threshold ) { |
| 745 | threshold = threshold || 200; |
| 746 | let last, timeout; |
| 747 | |
| 748 | return function() { |
| 749 | let now = +new Date(); |
| 750 | let args = arguments; |
| 751 | let trigger = () => { |
| 752 | last = now; |
| 753 | fn.apply( this, args ); |
| 754 | }; |
| 755 | if ( last && now < last + threshold ) { |
| 756 | // hold on to it |
| 757 | clearTimeout( timeout ); |
| 758 | timeout = setTimeout( trigger, threshold ); |
| 759 | } else { |
| 760 | trigger(); |
| 761 | } |
| 762 | }; |
| 763 | }; |
| 764 | |
| 765 | InfiniteScroll.data = function( elem ) { |
| 766 | elem = utils.getQueryElement( elem ); |
| 767 | let id = elem && elem.infiniteScrollGUID; |
| 768 | return id && instances[ id ]; |
| 769 | }; |
| 770 | |
| 771 | // set internal jQuery, for Webpack + jQuery v3 |
| 772 | InfiniteScroll.setJQuery = function( jqry ) { |
| 773 | jQuery = jqry; |
| 774 | }; |
| 775 | |
| 776 | // -------------------------- setup -------------------------- // |
| 777 | |
| 778 | utils.htmlInit( InfiniteScroll, 'infinite-scroll' ); |
| 779 | |
| 780 | // add noop _init method for jQuery Bridget. #768 |
| 781 | proto._init = function() {}; |
| 782 | |
| 783 | let { jQueryBridget } = window; |
| 784 | if ( jQuery && jQueryBridget ) { |
| 785 | jQueryBridget( 'infiniteScroll', InfiniteScroll, jQuery ); |
| 786 | } |
| 787 | |
| 788 | // -------------------------- -------------------------- // |
| 789 | |
| 790 | return InfiniteScroll; |
| 791 | |
| 792 | } ) ); |
| 793 | // page-load |
| 794 | ( function( window, factory ) { |
| 795 | // universal module definition |
| 796 | if ( typeof module == 'object' && module.exports ) { |
| 797 | // CommonJS |
| 798 | module.exports = factory( |
| 799 | window, |
| 800 | require('./core'), |
| 801 | ); |
| 802 | } else { |
| 803 | // browser global |
| 804 | factory( |
| 805 | window, |
| 806 | window.InfiniteScroll, |
| 807 | ); |
| 808 | } |
| 809 | |
| 810 | }( window, function factory( window, InfiniteScroll ) { |
| 811 | |
| 812 | let proto = InfiniteScroll.prototype; |
| 813 | |
| 814 | Object.assign( InfiniteScroll.defaults, { |
| 815 | // append: false, |
| 816 | loadOnScroll: true, |
| 817 | checkLastPage: true, |
| 818 | responseBody: 'text', |
| 819 | domParseResponse: true, |
| 820 | // prefill: false, |
| 821 | // outlayer: null, |
| 822 | } ); |
| 823 | |
| 824 | InfiniteScroll.create.pageLoad = function() { |
| 825 | this.canLoad = true; |
| 826 | this.on( 'scrollThreshold', this.onScrollThresholdLoad ); |
| 827 | this.on( 'load', this.checkLastPage ); |
| 828 | if ( this.options.outlayer ) { |
| 829 | this.on( 'append', this.onAppendOutlayer ); |
| 830 | } |
| 831 | }; |
| 832 | |
| 833 | proto.onScrollThresholdLoad = function() { |
| 834 | if ( this.options.loadOnScroll ) this.loadNextPage(); |
| 835 | }; |
| 836 | |
| 837 | let domParser = new DOMParser(); |
| 838 | |
| 839 | proto.loadNextPage = function() { |
| 840 | if ( this.isLoading || !this.canLoad ) return; |
| 841 | |
| 842 | let { responseBody, domParseResponse, fetchOptions } = this.options; |
| 843 | let path = this.getAbsolutePath(); |
| 844 | this.isLoading = true; |
| 845 | if ( typeof fetchOptions == 'function' ) fetchOptions = fetchOptions(); |
| 846 | |
| 847 | let fetchPromise = fetch( path, fetchOptions ) |
| 848 | .then( ( response ) => { |
| 849 | if ( !response.ok ) { |
| 850 | let error = new Error( response.statusText ); |
| 851 | this.onPageError( error, path, response ); |
| 852 | return { response }; |
| 853 | } |
| 854 | |
| 855 | return response[ responseBody ]().then( ( body ) => { |
| 856 | let canDomParse = responseBody == 'text' && domParseResponse; |
| 857 | if ( canDomParse ) { |
| 858 | body = domParser.parseFromString( body, 'text/html' ); |
| 859 | } |
| 860 | if ( response.status == 204 ) { |
| 861 | this.lastPageReached( body, path ); |
| 862 | return { body, response }; |
| 863 | } else { |
| 864 | return this.onPageLoad( body, path, response ); |
| 865 | } |
| 866 | } ); |
| 867 | } ) |
| 868 | .catch( ( error ) => { |
| 869 | this.onPageError( error, path ); |
| 870 | } ); |
| 871 | |
| 872 | this.dispatchEvent( 'request', null, [ path, fetchPromise ] ); |
| 873 | |
| 874 | return fetchPromise; |
| 875 | }; |
| 876 | |
| 877 | proto.onPageLoad = function( body, path, response ) { |
| 878 | // done loading if not appending |
| 879 | if ( !this.options.append ) { |
| 880 | this.isLoading = false; |
| 881 | } |
| 882 | this.pageIndex++; |
| 883 | this.loadCount++; |
| 884 | this.dispatchEvent( 'load', null, [ body, path, response ] ); |
| 885 | return this.appendNextPage( body, path, response ); |
| 886 | }; |
| 887 | |
| 888 | proto.appendNextPage = function( body, path, response ) { |
| 889 | let { append, responseBody, domParseResponse } = this.options; |
| 890 | // do not append json |
| 891 | let isDocument = responseBody == 'text' && domParseResponse; |
| 892 | if ( !isDocument || !append ) return { body, response }; |
| 893 | |
| 894 | let items = body.querySelectorAll( append ); |
| 895 | let promiseValue = { body, response, items }; |
| 896 | // last page hit if no items. #840 |
| 897 | if ( !items || !items.length ) { |
| 898 | this.lastPageReached( body, path ); |
| 899 | return promiseValue; |
| 900 | } |
| 901 | |
| 902 | let fragment = getItemsFragment( items ); |
| 903 | let appendReady = () => { |
| 904 | this.appendItems( items, fragment ); |
| 905 | this.isLoading = false; |
| 906 | this.dispatchEvent( 'append', null, [ body, path, items, response ] ); |
| 907 | return promiseValue; |
| 908 | }; |
| 909 | |
| 910 | // TODO add hook for option to trigger appendReady |
| 911 | if ( this.options.outlayer ) { |
| 912 | return this.appendOutlayerItems( fragment, appendReady ); |
| 913 | } else { |
| 914 | return appendReady(); |
| 915 | } |
| 916 | }; |
| 917 | |
| 918 | proto.appendItems = function( items, fragment ) { |
| 919 | if ( !items || !items.length ) return; |
| 920 | |
| 921 | // get fragment if not provided |
| 922 | fragment = fragment || getItemsFragment( items ); |
| 923 | refreshScripts( fragment ); |
| 924 | this.element.appendChild( fragment ); |
| 925 | }; |
| 926 | |
| 927 | function getItemsFragment( items ) { |
| 928 | // add items to fragment |
| 929 | let fragment = document.createDocumentFragment(); |
| 930 | if ( items ) fragment.append( ...items ); |
| 931 | return fragment; |
| 932 | } |
| 933 | |
| 934 | // replace <script>s with copies so they load |
| 935 | // <script>s added by InfiniteScroll will not load |
| 936 | // similar to https://stackoverflow.com/questions/610995 |
| 937 | function refreshScripts( fragment ) { |
| 938 | let scripts = fragment.querySelectorAll('script'); |
| 939 | for ( let script of scripts ) { |
| 940 | let freshScript = document.createElement('script'); |
| 941 | // copy attributes |
| 942 | let attrs = script.attributes; |
| 943 | for ( let attr of attrs ) { |
| 944 | freshScript.setAttribute( attr.name, attr.value ); |
| 945 | } |
| 946 | // copy inner script code. #718, #782 |
| 947 | freshScript.innerHTML = script.innerHTML; |
| 948 | script.parentNode.replaceChild( freshScript, script ); |
| 949 | } |
| 950 | } |
| 951 | |
| 952 | // ----- outlayer ----- // |
| 953 | |
| 954 | proto.appendOutlayerItems = function( fragment, appendReady ) { |
| 955 | let imagesLoaded = InfiniteScroll.imagesLoaded || window.imagesLoaded; |
| 956 | if ( !imagesLoaded ) { |
| 957 | console.error('[InfiniteScroll] imagesLoaded required for outlayer option'); |
| 958 | this.isLoading = false; |
| 959 | return; |
| 960 | } |
| 961 | // append once images loaded |
| 962 | return new Promise( function( resolve ) { |
| 963 | imagesLoaded( fragment, function() { |
| 964 | let bodyResponse = appendReady(); |
| 965 | resolve( bodyResponse ); |
| 966 | } ); |
| 967 | } ); |
| 968 | }; |
| 969 | |
| 970 | proto.onAppendOutlayer = function( response, path, items ) { |
| 971 | this.options.outlayer.appended( items ); |
| 972 | }; |
| 973 | |
| 974 | // ----- checkLastPage ----- // |
| 975 | |
| 976 | // check response for next element |
| 977 | proto.checkLastPage = function( body, path ) { |
| 978 | let { checkLastPage, path: pathOpt } = this.options; |
| 979 | if ( !checkLastPage ) return; |
| 980 | |
| 981 | // if path is function, check if next path is truthy |
| 982 | if ( typeof pathOpt == 'function' ) { |
| 983 | let nextPath = this.getPath(); |
| 984 | if ( !nextPath ) { |
| 985 | this.lastPageReached( body, path ); |
| 986 | return; |
| 987 | } |
| 988 | } |
| 989 | // get selector from checkLastPage or path option |
| 990 | let selector; |
| 991 | if ( typeof checkLastPage == 'string' ) { |
| 992 | selector = checkLastPage; |
| 993 | } else if ( this.isPathSelector ) { |
| 994 | // path option is selector string |
| 995 | selector = pathOpt; |
| 996 | } |
| 997 | // check last page for selector |
| 998 | // bail if no selector or not document response |
| 999 | if ( !selector || !body.querySelector ) return; |
| 1000 | |
| 1001 | // check if response has selector |
| 1002 | let nextElem = body.querySelector( selector ); |
| 1003 | if ( !nextElem ) this.lastPageReached( body, path ); |
| 1004 | }; |
| 1005 | |
| 1006 | proto.lastPageReached = function( body, path ) { |
| 1007 | this.canLoad = false; |
| 1008 | this.dispatchEvent( 'last', null, [ body, path ] ); |
| 1009 | }; |
| 1010 | |
| 1011 | // ----- error ----- // |
| 1012 | |
| 1013 | proto.onPageError = function( error, path, response ) { |
| 1014 | this.isLoading = false; |
| 1015 | this.canLoad = false; |
| 1016 | this.dispatchEvent( 'error', null, [ error, path, response ] ); |
| 1017 | return error; |
| 1018 | }; |
| 1019 | |
| 1020 | // -------------------------- prefill -------------------------- // |
| 1021 | |
| 1022 | InfiniteScroll.create.prefill = function() { |
| 1023 | if ( !this.options.prefill ) return; |
| 1024 | |
| 1025 | let append = this.options.append; |
| 1026 | if ( !append ) { |
| 1027 | console.error(`append option required for prefill. Set as :${append}`); |
| 1028 | return; |
| 1029 | } |
| 1030 | this.updateMeasurements(); |
| 1031 | this.updateScroller(); |
| 1032 | this.isPrefilling = true; |
| 1033 | this.on( 'append', this.prefill ); |
| 1034 | this.once( 'error', this.stopPrefill ); |
| 1035 | this.once( 'last', this.stopPrefill ); |
| 1036 | this.prefill(); |
| 1037 | }; |
| 1038 | |
| 1039 | proto.prefill = function() { |
| 1040 | let distance = this.getPrefillDistance(); |
| 1041 | this.isPrefilling = distance >= 0; |
| 1042 | if ( this.isPrefilling ) { |
| 1043 | this.log('prefill'); |
| 1044 | this.loadNextPage(); |
| 1045 | } else { |
| 1046 | this.stopPrefill(); |
| 1047 | } |
| 1048 | }; |
| 1049 | |
| 1050 | proto.getPrefillDistance = function() { |
| 1051 | // element scroll |
| 1052 | if ( this.options.elementScroll ) { |
| 1053 | return this.scroller.clientHeight - this.scroller.scrollHeight; |
| 1054 | } |
| 1055 | // window |
| 1056 | return this.windowHeight - this.element.clientHeight; |
| 1057 | }; |
| 1058 | |
| 1059 | proto.stopPrefill = function() { |
| 1060 | this.log('stopPrefill'); |
| 1061 | this.off( 'append', this.prefill ); |
| 1062 | }; |
| 1063 | |
| 1064 | // -------------------------- -------------------------- // |
| 1065 | |
| 1066 | return InfiniteScroll; |
| 1067 | |
| 1068 | } ) ); |
| 1069 | // scroll-watch |
| 1070 | ( function( window, factory ) { |
| 1071 | // universal module definition |
| 1072 | if ( typeof module == 'object' && module.exports ) { |
| 1073 | // CommonJS |
| 1074 | module.exports = factory( |
| 1075 | window, |
| 1076 | require('./core'), |
| 1077 | require('fizzy-ui-utils'), |
| 1078 | ); |
| 1079 | } else { |
| 1080 | // browser global |
| 1081 | factory( |
| 1082 | window, |
| 1083 | window.InfiniteScroll, |
| 1084 | window.fizzyUIUtils, |
| 1085 | ); |
| 1086 | } |
| 1087 | |
| 1088 | }( window, function factory( window, InfiniteScroll, utils ) { |
| 1089 | |
| 1090 | let proto = InfiniteScroll.prototype; |
| 1091 | |
| 1092 | // default options |
| 1093 | Object.assign( InfiniteScroll.defaults, { |
| 1094 | scrollThreshold: 400, |
| 1095 | // elementScroll: null, |
| 1096 | } ); |
| 1097 | |
| 1098 | InfiniteScroll.create.scrollWatch = function() { |
| 1099 | // events |
| 1100 | this.pageScrollHandler = this.onPageScroll.bind( this ); |
| 1101 | this.resizeHandler = this.onResize.bind( this ); |
| 1102 | |
| 1103 | let scrollThreshold = this.options.scrollThreshold; |
| 1104 | let isEnable = scrollThreshold || scrollThreshold === 0; |
| 1105 | if ( isEnable ) this.enableScrollWatch(); |
| 1106 | }; |
| 1107 | |
| 1108 | InfiniteScroll.destroy.scrollWatch = function() { |
| 1109 | this.disableScrollWatch(); |
| 1110 | }; |
| 1111 | |
| 1112 | proto.enableScrollWatch = function() { |
| 1113 | if ( this.isScrollWatching ) return; |
| 1114 | |
| 1115 | this.isScrollWatching = true; |
| 1116 | this.updateMeasurements(); |
| 1117 | this.updateScroller(); |
| 1118 | // TODO disable after error? |
| 1119 | this.on( 'last', this.disableScrollWatch ); |
| 1120 | this.bindScrollWatchEvents( true ); |
| 1121 | }; |
| 1122 | |
| 1123 | proto.disableScrollWatch = function() { |
| 1124 | if ( !this.isScrollWatching ) return; |
| 1125 | |
| 1126 | this.bindScrollWatchEvents( false ); |
| 1127 | delete this.isScrollWatching; |
| 1128 | }; |
| 1129 | |
| 1130 | proto.bindScrollWatchEvents = function( isBind ) { |
| 1131 | let addRemove = isBind ? 'addEventListener' : 'removeEventListener'; |
| 1132 | this.scroller[ addRemove ]( 'scroll', this.pageScrollHandler ); |
| 1133 | window[ addRemove ]( 'resize', this.resizeHandler ); |
| 1134 | }; |
| 1135 | |
| 1136 | proto.onPageScroll = InfiniteScroll.throttle( function() { |
| 1137 | let distance = this.getBottomDistance(); |
| 1138 | if ( distance <= this.options.scrollThreshold ) { |
| 1139 | this.dispatchEvent('scrollThreshold'); |
| 1140 | } |
| 1141 | } ); |
| 1142 | |
| 1143 | proto.getBottomDistance = function() { |
| 1144 | let bottom, scrollY; |
| 1145 | if ( this.options.elementScroll ) { |
| 1146 | bottom = this.scroller.scrollHeight; |
| 1147 | scrollY = this.scroller.scrollTop + this.scroller.clientHeight; |
| 1148 | } else { |
| 1149 | bottom = this.top + this.element.clientHeight; |
| 1150 | scrollY = window.scrollY + this.windowHeight; |
| 1151 | } |
| 1152 | return bottom - scrollY; |
| 1153 | }; |
| 1154 | |
| 1155 | proto.onResize = function() { |
| 1156 | this.updateMeasurements(); |
| 1157 | }; |
| 1158 | |
| 1159 | utils.debounceMethod( InfiniteScroll, 'onResize', 150 ); |
| 1160 | |
| 1161 | // -------------------------- -------------------------- // |
| 1162 | |
| 1163 | return InfiniteScroll; |
| 1164 | |
| 1165 | } ) ); |
| 1166 | // history |
| 1167 | ( function( window, factory ) { |
| 1168 | // universal module definition |
| 1169 | if ( typeof module == 'object' && module.exports ) { |
| 1170 | // CommonJS |
| 1171 | module.exports = factory( |
| 1172 | window, |
| 1173 | require('./core'), |
| 1174 | require('fizzy-ui-utils'), |
| 1175 | ); |
| 1176 | } else { |
| 1177 | // browser global |
| 1178 | factory( |
| 1179 | window, |
| 1180 | window.InfiniteScroll, |
| 1181 | window.fizzyUIUtils, |
| 1182 | ); |
| 1183 | } |
| 1184 | |
| 1185 | }( window, function factory( window, InfiniteScroll, utils ) { |
| 1186 | |
| 1187 | let proto = InfiniteScroll.prototype; |
| 1188 | |
| 1189 | Object.assign( InfiniteScroll.defaults, { |
| 1190 | history: 'replace', |
| 1191 | // historyTitle: false, |
| 1192 | } ); |
| 1193 | |
| 1194 | let link = document.createElement('a'); |
| 1195 | |
| 1196 | // ----- create/destroy ----- // |
| 1197 | |
| 1198 | InfiniteScroll.create.history = function() { |
| 1199 | if ( !this.options.history ) return; |
| 1200 | |
| 1201 | // check for same origin |
| 1202 | link.href = this.getAbsolutePath(); |
| 1203 | // MS Edge does not have origin on link |
| 1204 | // https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/12236493/ |
| 1205 | let linkOrigin = link.origin || link.protocol + '//' + link.host; |
| 1206 | let isSameOrigin = linkOrigin == location.origin; |
| 1207 | if ( !isSameOrigin ) { |
| 1208 | console.error( '[InfiniteScroll] cannot set history with different origin: ' + |
| 1209 | `${link.origin} on ${location.origin} . History behavior disabled.` ); |
| 1210 | return; |
| 1211 | } |
| 1212 | |
| 1213 | // two ways to handle changing history |
| 1214 | if ( this.options.append ) { |
| 1215 | this.createHistoryAppend(); |
| 1216 | } else { |
| 1217 | this.createHistoryPageLoad(); |
| 1218 | } |
| 1219 | }; |
| 1220 | |
| 1221 | proto.createHistoryAppend = function() { |
| 1222 | this.updateMeasurements(); |
| 1223 | this.updateScroller(); |
| 1224 | // array of scroll positions of appended pages |
| 1225 | this.scrollPages = [ |
| 1226 | // first page |
| 1227 | { |
| 1228 | top: 0, |
| 1229 | path: location.href, |
| 1230 | title: document.title, |
| 1231 | }, |
| 1232 | ]; |
| 1233 | this.scrollPage = this.scrollPages[0]; |
| 1234 | // events |
| 1235 | this.scrollHistoryHandler = this.onScrollHistory.bind( this ); |
| 1236 | this.unloadHandler = this.onUnload.bind( this ); |
| 1237 | this.scroller.addEventListener( 'scroll', this.scrollHistoryHandler ); |
| 1238 | this.on( 'append', this.onAppendHistory ); |
| 1239 | this.bindHistoryAppendEvents( true ); |
| 1240 | }; |
| 1241 | |
| 1242 | proto.bindHistoryAppendEvents = function( isBind ) { |
| 1243 | let addRemove = isBind ? 'addEventListener' : 'removeEventListener'; |
| 1244 | this.scroller[ addRemove ]( 'scroll', this.scrollHistoryHandler ); |
| 1245 | window[ addRemove ]( 'unload', this.unloadHandler ); |
| 1246 | }; |
| 1247 | |
| 1248 | proto.createHistoryPageLoad = function() { |
| 1249 | this.on( 'load', this.onPageLoadHistory ); |
| 1250 | }; |
| 1251 | |
| 1252 | InfiniteScroll.destroy.history = |
| 1253 | proto.destroyHistory = function() { |
| 1254 | let isHistoryAppend = this.options.history && this.options.append; |
| 1255 | if ( isHistoryAppend ) { |
| 1256 | this.bindHistoryAppendEvents( false ); |
| 1257 | } |
| 1258 | }; |
| 1259 | |
| 1260 | // ----- append history ----- // |
| 1261 | |
| 1262 | proto.onAppendHistory = function( response, path, items ) { |
| 1263 | // do not proceed if no items. #779 |
| 1264 | if ( !items || !items.length ) return; |
| 1265 | |
| 1266 | let firstItem = items[0]; |
| 1267 | let elemScrollY = this.getElementScrollY( firstItem ); |
| 1268 | // resolve path |
| 1269 | link.href = path; |
| 1270 | // add page data to hash |
| 1271 | this.scrollPages.push({ |
| 1272 | top: elemScrollY, |
| 1273 | path: link.href, |
| 1274 | title: response.title, |
| 1275 | }); |
| 1276 | }; |
| 1277 | |
| 1278 | proto.getElementScrollY = function( elem ) { |
| 1279 | if ( this.options.elementScroll ) { |
| 1280 | return elem.offsetTop - this.top; |
| 1281 | } else { |
| 1282 | let rect = elem.getBoundingClientRect(); |
| 1283 | return rect.top + window.scrollY; |
| 1284 | } |
| 1285 | }; |
| 1286 | |
| 1287 | proto.onScrollHistory = function() { |
| 1288 | // cycle through positions, find biggest without going over |
| 1289 | let scrollPage = this.getClosestScrollPage(); |
| 1290 | // set history if changed |
| 1291 | if ( scrollPage != this.scrollPage ) { |
| 1292 | this.scrollPage = scrollPage; |
| 1293 | this.setHistory( scrollPage.title, scrollPage.path ); |
| 1294 | } |
| 1295 | }; |
| 1296 | |
| 1297 | utils.debounceMethod( InfiniteScroll, 'onScrollHistory', 150 ); |
| 1298 | |
| 1299 | proto.getClosestScrollPage = function() { |
| 1300 | let scrollViewY; |
| 1301 | if ( this.options.elementScroll ) { |
| 1302 | scrollViewY = this.scroller.scrollTop + this.scroller.clientHeight / 2; |
| 1303 | } else { |
| 1304 | scrollViewY = window.scrollY + this.windowHeight / 2; |
| 1305 | } |
| 1306 | |
| 1307 | let scrollPage; |
| 1308 | for ( let page of this.scrollPages ) { |
| 1309 | if ( page.top >= scrollViewY ) break; |
| 1310 | |
| 1311 | scrollPage = page; |
| 1312 | } |
| 1313 | return scrollPage; |
| 1314 | }; |
| 1315 | |
| 1316 | proto.setHistory = function( title, path ) { |
| 1317 | let optHistory = this.options.history; |
| 1318 | let historyMethod = optHistory && history[ optHistory + 'State' ]; |
| 1319 | if ( !historyMethod ) return; |
| 1320 | |
| 1321 | history[ optHistory + 'State' ]( null, title, path ); |
| 1322 | if ( this.options.historyTitle ) document.title = title; |
| 1323 | this.dispatchEvent( 'history', null, [ title, path ] ); |
| 1324 | }; |
| 1325 | |
| 1326 | // scroll to top to prevent initial scroll-reset after page refresh |
| 1327 | // https://stackoverflow.com/a/18633915/182183 |
| 1328 | proto.onUnload = function() { |
| 1329 | if ( this.scrollPage.top === 0 ) return; |
| 1330 | |
| 1331 | // calculate where scroll position would be on refresh |
| 1332 | let scrollY = window.scrollY - this.scrollPage.top + this.top; |
| 1333 | // disable scroll event before setting scroll #679 |
| 1334 | this.destroyHistory(); |
| 1335 | scrollTo( 0, scrollY ); |
| 1336 | }; |
| 1337 | |
| 1338 | // ----- load history ----- // |
| 1339 | |
| 1340 | // update URL |
| 1341 | proto.onPageLoadHistory = function( response, path ) { |
| 1342 | this.setHistory( response.title, path ); |
| 1343 | }; |
| 1344 | |
| 1345 | // -------------------------- -------------------------- // |
| 1346 | |
| 1347 | return InfiniteScroll; |
| 1348 | |
| 1349 | } ) ); |
| 1350 | // button |
| 1351 | ( function( window, factory ) { |
| 1352 | // universal module definition |
| 1353 | if ( typeof module == 'object' && module.exports ) { |
| 1354 | // CommonJS |
| 1355 | module.exports = factory( |
| 1356 | window, |
| 1357 | require('./core'), |
| 1358 | require('fizzy-ui-utils'), |
| 1359 | ); |
| 1360 | } else { |
| 1361 | // browser global |
| 1362 | factory( |
| 1363 | window, |
| 1364 | window.InfiniteScroll, |
| 1365 | window.fizzyUIUtils, |
| 1366 | ); |
| 1367 | } |
| 1368 | |
| 1369 | }( window, function factory( window, InfiniteScroll, utils ) { |
| 1370 | |
| 1371 | // -------------------------- InfiniteScrollButton -------------------------- // |
| 1372 | |
| 1373 | class InfiniteScrollButton { |
| 1374 | constructor( element, infScroll ) { |
| 1375 | this.element = element; |
| 1376 | this.infScroll = infScroll; |
| 1377 | // events |
| 1378 | this.clickHandler = this.onClick.bind( this ); |
| 1379 | this.element.addEventListener( 'click', this.clickHandler ); |
| 1380 | infScroll.on( 'request', this.disable.bind( this ) ); |
| 1381 | infScroll.on( 'load', this.enable.bind( this ) ); |
| 1382 | infScroll.on( 'error', this.hide.bind( this ) ); |
| 1383 | infScroll.on( 'last', this.hide.bind( this ) ); |
| 1384 | } |
| 1385 | |
| 1386 | onClick( event ) { |
| 1387 | event.preventDefault(); |
| 1388 | this.infScroll.loadNextPage(); |
| 1389 | } |
| 1390 | |
| 1391 | enable() { |
| 1392 | this.element.removeAttribute('disabled'); |
| 1393 | } |
| 1394 | |
| 1395 | disable() { |
| 1396 | this.element.disabled = 'disabled'; |
| 1397 | } |
| 1398 | |
| 1399 | hide() { |
| 1400 | this.element.style.display = 'none'; |
| 1401 | } |
| 1402 | |
| 1403 | destroy() { |
| 1404 | this.element.removeEventListener( 'click', this.clickHandler ); |
| 1405 | } |
| 1406 | |
| 1407 | } |
| 1408 | |
| 1409 | // -------------------------- InfiniteScroll methods -------------------------- // |
| 1410 | |
| 1411 | // InfiniteScroll.defaults.button = null; |
| 1412 | |
| 1413 | InfiniteScroll.create.button = function() { |
| 1414 | let buttonElem = utils.getQueryElement( this.options.button ); |
| 1415 | if ( buttonElem ) { |
| 1416 | this.button = new InfiniteScrollButton( buttonElem, this ); |
| 1417 | } |
| 1418 | }; |
| 1419 | |
| 1420 | InfiniteScroll.destroy.button = function() { |
| 1421 | if ( this.button ) this.button.destroy(); |
| 1422 | }; |
| 1423 | |
| 1424 | // -------------------------- -------------------------- // |
| 1425 | |
| 1426 | InfiniteScroll.Button = InfiniteScrollButton; |
| 1427 | |
| 1428 | return InfiniteScroll; |
| 1429 | |
| 1430 | } ) ); |
| 1431 | // status |
| 1432 | ( function( window, factory ) { |
| 1433 | // universal module definition |
| 1434 | if ( typeof module == 'object' && module.exports ) { |
| 1435 | // CommonJS |
| 1436 | module.exports = factory( |
| 1437 | window, |
| 1438 | require('./core'), |
| 1439 | require('fizzy-ui-utils'), |
| 1440 | ); |
| 1441 | } else { |
| 1442 | // browser global |
| 1443 | factory( |
| 1444 | window, |
| 1445 | window.InfiniteScroll, |
| 1446 | window.fizzyUIUtils, |
| 1447 | ); |
| 1448 | } |
| 1449 | |
| 1450 | }( window, function factory( window, InfiniteScroll, utils ) { |
| 1451 | |
| 1452 | let proto = InfiniteScroll.prototype; |
| 1453 | |
| 1454 | // InfiniteScroll.defaults.status = null; |
| 1455 | |
| 1456 | InfiniteScroll.create.status = function() { |
| 1457 | let statusElem = utils.getQueryElement( this.options.status ); |
| 1458 | if ( !statusElem ) return; |
| 1459 | |
| 1460 | // elements |
| 1461 | this.statusElement = statusElem; |
| 1462 | this.statusEventElements = { |
| 1463 | request: statusElem.querySelector('.infinite-scroll-request'), |
| 1464 | error: statusElem.querySelector('.infinite-scroll-error'), |
| 1465 | last: statusElem.querySelector('.infinite-scroll-last'), |
| 1466 | }; |
| 1467 | // events |
| 1468 | this.on( 'request', this.showRequestStatus ); |
| 1469 | this.on( 'error', this.showErrorStatus ); |
| 1470 | this.on( 'last', this.showLastStatus ); |
| 1471 | this.bindHideStatus('on'); |
| 1472 | }; |
| 1473 | |
| 1474 | proto.bindHideStatus = function( bindMethod ) { |
| 1475 | let hideEvent = this.options.append ? 'append' : 'load'; |
| 1476 | this[ bindMethod ]( hideEvent, this.hideAllStatus ); |
| 1477 | }; |
| 1478 | |
| 1479 | proto.showRequestStatus = function() { |
| 1480 | this.showStatus('request'); |
| 1481 | }; |
| 1482 | |
| 1483 | proto.showErrorStatus = function() { |
| 1484 | this.showStatus('error'); |
| 1485 | }; |
| 1486 | |
| 1487 | proto.showLastStatus = function() { |
| 1488 | this.showStatus('last'); |
| 1489 | // prevent last then append event race condition from showing last status #706 |
| 1490 | this.bindHideStatus('off'); |
| 1491 | }; |
| 1492 | |
| 1493 | proto.showStatus = function( eventName ) { |
| 1494 | show( this.statusElement ); |
| 1495 | this.hideStatusEventElements(); |
| 1496 | let eventElem = this.statusEventElements[ eventName ]; |
| 1497 | show( eventElem ); |
| 1498 | }; |
| 1499 | |
| 1500 | proto.hideAllStatus = function() { |
| 1501 | hide( this.statusElement ); |
| 1502 | this.hideStatusEventElements(); |
| 1503 | }; |
| 1504 | |
| 1505 | proto.hideStatusEventElements = function() { |
| 1506 | for ( let type in this.statusEventElements ) { |
| 1507 | let eventElem = this.statusEventElements[ type ]; |
| 1508 | hide( eventElem ); |
| 1509 | } |
| 1510 | }; |
| 1511 | |
| 1512 | // -------------------------- -------------------------- // |
| 1513 | |
| 1514 | function hide( elem ) { |
| 1515 | setDisplay( elem, 'none' ); |
| 1516 | } |
| 1517 | |
| 1518 | function show( elem ) { |
| 1519 | setDisplay( elem, 'block' ); |
| 1520 | } |
| 1521 | |
| 1522 | function setDisplay( elem, value ) { |
| 1523 | if ( elem ) { |
| 1524 | elem.style.display = value; |
| 1525 | } |
| 1526 | } |
| 1527 | |
| 1528 | // -------------------------- -------------------------- // |
| 1529 | |
| 1530 | return InfiniteScroll; |
| 1531 | |
| 1532 | } ) ); |
| 1533 | /*! |
| 1534 | * imagesLoaded v4.1.4 |
| 1535 | * JavaScript is all like "You images are done yet or what?" |
| 1536 | * MIT License |
| 1537 | */ |
| 1538 | |
| 1539 | ( function( window, factory ) { 'use strict'; |
| 1540 | // universal module definition |
| 1541 | |
| 1542 | /*global define: false, module: false, require: false */ |
| 1543 | |
| 1544 | if ( typeof define == 'function' && define.amd ) { |
| 1545 | // AMD |
| 1546 | define( [ |
| 1547 | 'ev-emitter/ev-emitter' |
| 1548 | ], function( EvEmitter ) { |
| 1549 | return factory( window, EvEmitter ); |
| 1550 | }); |
| 1551 | } else if ( typeof module == 'object' && module.exports ) { |
| 1552 | // CommonJS |
| 1553 | module.exports = factory( |
| 1554 | window, |
| 1555 | require('ev-emitter') |
| 1556 | ); |
| 1557 | } else { |
| 1558 | // browser global |
| 1559 | window.imagesLoaded = factory( |
| 1560 | window, |
| 1561 | window.EvEmitter |
| 1562 | ); |
| 1563 | } |
| 1564 | |
| 1565 | })( typeof window !== 'undefined' ? window : this, |
| 1566 | |
| 1567 | // -------------------------- factory -------------------------- // |
| 1568 | |
| 1569 | function factory( window, EvEmitter ) { |
| 1570 | |
| 1571 | 'use strict'; |
| 1572 | |
| 1573 | var $ = window.jQuery; |
| 1574 | var console = window.console; |
| 1575 | |
| 1576 | // -------------------------- helpers -------------------------- // |
| 1577 | |
| 1578 | // extend objects |
| 1579 | function extend( a, b ) { |
| 1580 | for ( var prop in b ) { |
| 1581 | a[ prop ] = b[ prop ]; |
| 1582 | } |
| 1583 | return a; |
| 1584 | } |
| 1585 | |
| 1586 | var arraySlice = Array.prototype.slice; |
| 1587 | |
| 1588 | // turn element or nodeList into an array |
| 1589 | function makeArray( obj ) { |
| 1590 | if ( Array.isArray( obj ) ) { |
| 1591 | // use object if already an array |
| 1592 | return obj; |
| 1593 | } |
| 1594 | |
| 1595 | var isArrayLike = typeof obj == 'object' && typeof obj.length == 'number'; |
| 1596 | if ( isArrayLike ) { |
| 1597 | // convert nodeList to array |
| 1598 | return arraySlice.call( obj ); |
| 1599 | } |
| 1600 | |
| 1601 | // array of single index |
| 1602 | return [ obj ]; |
| 1603 | } |
| 1604 | |
| 1605 | // -------------------------- imagesLoaded -------------------------- // |
| 1606 | |
| 1607 | /** |
| 1608 | * @param {Array, Element, NodeList, String} elem |
| 1609 | * @param {Object or Function} options - if function, use as callback |
| 1610 | * @param {Function} onAlways - callback function |
| 1611 | */ |
| 1612 | function ImagesLoaded( elem, options, onAlways ) { |
| 1613 | // coerce ImagesLoaded() without new, to be new ImagesLoaded() |
| 1614 | if ( !( this instanceof ImagesLoaded ) ) { |
| 1615 | return new ImagesLoaded( elem, options, onAlways ); |
| 1616 | } |
| 1617 | // use elem as selector string |
| 1618 | var queryElem = elem; |
| 1619 | if ( typeof elem == 'string' ) { |
| 1620 | queryElem = document.querySelectorAll( elem ); |
| 1621 | } |
| 1622 | // bail if bad element |
| 1623 | if ( !queryElem ) { |
| 1624 | console.error( 'Bad element for imagesLoaded ' + ( queryElem || elem ) ); |
| 1625 | return; |
| 1626 | } |
| 1627 | |
| 1628 | this.elements = makeArray( queryElem ); |
| 1629 | this.options = extend( {}, this.options ); |
| 1630 | // shift arguments if no options set |
| 1631 | if ( typeof options == 'function' ) { |
| 1632 | onAlways = options; |
| 1633 | } else { |
| 1634 | extend( this.options, options ); |
| 1635 | } |
| 1636 | |
| 1637 | if ( onAlways ) { |
| 1638 | this.on( 'always', onAlways ); |
| 1639 | } |
| 1640 | |
| 1641 | this.getImages(); |
| 1642 | |
| 1643 | if ( $ ) { |
| 1644 | // add jQuery Deferred object |
| 1645 | this.jqDeferred = new $.Deferred(); |
| 1646 | } |
| 1647 | |
| 1648 | // HACK check async to allow time to bind listeners |
| 1649 | setTimeout( this.check.bind( this ) ); |
| 1650 | } |
| 1651 | |
| 1652 | ImagesLoaded.prototype = Object.create( EvEmitter.prototype ); |
| 1653 | |
| 1654 | ImagesLoaded.prototype.options = {}; |
| 1655 | |
| 1656 | ImagesLoaded.prototype.getImages = function() { |
| 1657 | this.images = []; |
| 1658 | |
| 1659 | // filter & find items if we have an item selector |
| 1660 | this.elements.forEach( this.addElementImages, this ); |
| 1661 | }; |
| 1662 | |
| 1663 | /** |
| 1664 | * @param {Node} element |
| 1665 | */ |
| 1666 | ImagesLoaded.prototype.addElementImages = function( elem ) { |
| 1667 | // filter siblings |
| 1668 | if ( elem.nodeName == 'IMG' ) { |
| 1669 | this.addImage( elem ); |
| 1670 | } |
| 1671 | // get background image on element |
| 1672 | if ( this.options.background === true ) { |
| 1673 | this.addElementBackgroundImages( elem ); |
| 1674 | } |
| 1675 | |
| 1676 | // find children |
| 1677 | // no non-element nodes, #143 |
| 1678 | var nodeType = elem.nodeType; |
| 1679 | if ( !nodeType || !elementNodeTypes[ nodeType ] ) { |
| 1680 | return; |
| 1681 | } |
| 1682 | var childImgs = elem.querySelectorAll('img'); |
| 1683 | // concat childElems to filterFound array |
| 1684 | for ( var i=0; i < childImgs.length; i++ ) { |
| 1685 | var img = childImgs[i]; |
| 1686 | this.addImage( img ); |
| 1687 | } |
| 1688 | |
| 1689 | // get child background images |
| 1690 | if ( typeof this.options.background == 'string' ) { |
| 1691 | var children = elem.querySelectorAll( this.options.background ); |
| 1692 | for ( i=0; i < children.length; i++ ) { |
| 1693 | var child = children[i]; |
| 1694 | this.addElementBackgroundImages( child ); |
| 1695 | } |
| 1696 | } |
| 1697 | }; |
| 1698 | |
| 1699 | var elementNodeTypes = { |
| 1700 | 1: true, |
| 1701 | 9: true, |
| 1702 | 11: true |
| 1703 | }; |
| 1704 | |
| 1705 | ImagesLoaded.prototype.addElementBackgroundImages = function( elem ) { |
| 1706 | var style = getComputedStyle( elem ); |
| 1707 | if ( !style ) { |
| 1708 | // Firefox returns null if in a hidden iframe https://bugzil.la/548397 |
| 1709 | return; |
| 1710 | } |
| 1711 | // get url inside url("...") |
| 1712 | var reURL = /url\((['"])?(.*?)\1\)/gi; |
| 1713 | var matches = reURL.exec( style.backgroundImage ); |
| 1714 | while ( matches !== null ) { |
| 1715 | var url = matches && matches[2]; |
| 1716 | if ( url ) { |
| 1717 | this.addBackground( url, elem ); |
| 1718 | } |
| 1719 | matches = reURL.exec( style.backgroundImage ); |
| 1720 | } |
| 1721 | }; |
| 1722 | |
| 1723 | /** |
| 1724 | * @param {Image} img |
| 1725 | */ |
| 1726 | ImagesLoaded.prototype.addImage = function( img ) { |
| 1727 | var loadingImage = new LoadingImage( img ); |
| 1728 | this.images.push( loadingImage ); |
| 1729 | }; |
| 1730 | |
| 1731 | ImagesLoaded.prototype.addBackground = function( url, elem ) { |
| 1732 | var background = new Background( url, elem ); |
| 1733 | this.images.push( background ); |
| 1734 | }; |
| 1735 | |
| 1736 | ImagesLoaded.prototype.check = function() { |
| 1737 | var _this = this; |
| 1738 | this.progressedCount = 0; |
| 1739 | this.hasAnyBroken = false; |
| 1740 | // complete if no images |
| 1741 | if ( !this.images.length ) { |
| 1742 | this.complete(); |
| 1743 | return; |
| 1744 | } |
| 1745 | |
| 1746 | function onProgress( image, elem, message ) { |
| 1747 | // HACK - Chrome triggers event before object properties have changed. #83 |
| 1748 | setTimeout( function() { |
| 1749 | _this.progress( image, elem, message ); |
| 1750 | }); |
| 1751 | } |
| 1752 | |
| 1753 | this.images.forEach( function( loadingImage ) { |
| 1754 | loadingImage.once( 'progress', onProgress ); |
| 1755 | loadingImage.check(); |
| 1756 | }); |
| 1757 | }; |
| 1758 | |
| 1759 | ImagesLoaded.prototype.progress = function( image, elem, message ) { |
| 1760 | this.progressedCount++; |
| 1761 | this.hasAnyBroken = this.hasAnyBroken || !image.isLoaded; |
| 1762 | // progress event |
| 1763 | this.emitEvent( 'progress', [ this, image, elem ] ); |
| 1764 | if ( this.jqDeferred && this.jqDeferred.notify ) { |
| 1765 | this.jqDeferred.notify( this, image ); |
| 1766 | } |
| 1767 | // check if completed |
| 1768 | if ( this.progressedCount == this.images.length ) { |
| 1769 | this.complete(); |
| 1770 | } |
| 1771 | |
| 1772 | if ( this.options.debug && console ) { |
| 1773 | console.log( 'progress: ' + message, image, elem ); |
| 1774 | } |
| 1775 | }; |
| 1776 | |
| 1777 | ImagesLoaded.prototype.complete = function() { |
| 1778 | var eventName = this.hasAnyBroken ? 'fail' : 'done'; |
| 1779 | this.isComplete = true; |
| 1780 | this.emitEvent( eventName, [ this ] ); |
| 1781 | this.emitEvent( 'always', [ this ] ); |
| 1782 | if ( this.jqDeferred ) { |
| 1783 | var jqMethod = this.hasAnyBroken ? 'reject' : 'resolve'; |
| 1784 | this.jqDeferred[ jqMethod ]( this ); |
| 1785 | } |
| 1786 | }; |
| 1787 | |
| 1788 | // -------------------------- -------------------------- // |
| 1789 | |
| 1790 | function LoadingImage( img ) { |
| 1791 | this.img = img; |
| 1792 | } |
| 1793 | |
| 1794 | LoadingImage.prototype = Object.create( EvEmitter.prototype ); |
| 1795 | |
| 1796 | LoadingImage.prototype.check = function() { |
| 1797 | // If complete is true and browser supports natural sizes, |
| 1798 | // try to check for image status manually. |
| 1799 | var isComplete = this.getIsImageComplete(); |
| 1800 | if ( isComplete ) { |
| 1801 | // report based on naturalWidth |
| 1802 | this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' ); |
| 1803 | return; |
| 1804 | } |
| 1805 | |
| 1806 | // If none of the checks above matched, simulate loading on detached element. |
| 1807 | this.proxyImage = new Image(); |
| 1808 | this.proxyImage.addEventListener( 'load', this ); |
| 1809 | this.proxyImage.addEventListener( 'error', this ); |
| 1810 | // bind to image as well for Firefox. #191 |
| 1811 | this.img.addEventListener( 'load', this ); |
| 1812 | this.img.addEventListener( 'error', this ); |
| 1813 | this.proxyImage.src = this.img.src; |
| 1814 | }; |
| 1815 | |
| 1816 | LoadingImage.prototype.getIsImageComplete = function() { |
| 1817 | // check for non-zero, non-undefined naturalWidth |
| 1818 | // fixes Safari+InfiniteScroll+Masonry bug infinite-scroll#671 |
| 1819 | return this.img.complete && this.img.naturalWidth; |
| 1820 | }; |
| 1821 | |
| 1822 | LoadingImage.prototype.confirm = function( isLoaded, message ) { |
| 1823 | this.isLoaded = isLoaded; |
| 1824 | this.emitEvent( 'progress', [ this, this.img, message ] ); |
| 1825 | }; |
| 1826 | |
| 1827 | // ----- events ----- // |
| 1828 | |
| 1829 | // trigger specified handler for event type |
| 1830 | LoadingImage.prototype.handleEvent = function( event ) { |
| 1831 | var method = 'on' + event.type; |
| 1832 | if ( this[ method ] ) { |
| 1833 | this[ method ]( event ); |
| 1834 | } |
| 1835 | }; |
| 1836 | |
| 1837 | LoadingImage.prototype.onload = function() { |
| 1838 | this.confirm( true, 'onload' ); |
| 1839 | this.unbindEvents(); |
| 1840 | }; |
| 1841 | |
| 1842 | LoadingImage.prototype.onerror = function() { |
| 1843 | this.confirm( false, 'onerror' ); |
| 1844 | this.unbindEvents(); |
| 1845 | }; |
| 1846 | |
| 1847 | LoadingImage.prototype.unbindEvents = function() { |
| 1848 | this.proxyImage.removeEventListener( 'load', this ); |
| 1849 | this.proxyImage.removeEventListener( 'error', this ); |
| 1850 | this.img.removeEventListener( 'load', this ); |
| 1851 | this.img.removeEventListener( 'error', this ); |
| 1852 | }; |
| 1853 | |
| 1854 | // -------------------------- Background -------------------------- // |
| 1855 | |
| 1856 | function Background( url, element ) { |
| 1857 | this.url = url; |
| 1858 | this.element = element; |
| 1859 | this.img = new Image(); |
| 1860 | } |
| 1861 | |
| 1862 | // inherit LoadingImage prototype |
| 1863 | Background.prototype = Object.create( LoadingImage.prototype ); |
| 1864 | |
| 1865 | Background.prototype.check = function() { |
| 1866 | this.img.addEventListener( 'load', this ); |
| 1867 | this.img.addEventListener( 'error', this ); |
| 1868 | this.img.src = this.url; |
| 1869 | // check if image is already complete |
| 1870 | var isComplete = this.getIsImageComplete(); |
| 1871 | if ( isComplete ) { |
| 1872 | this.confirm( this.img.naturalWidth !== 0, 'naturalWidth' ); |
| 1873 | this.unbindEvents(); |
| 1874 | } |
| 1875 | }; |
| 1876 | |
| 1877 | Background.prototype.unbindEvents = function() { |
| 1878 | this.img.removeEventListener( 'load', this ); |
| 1879 | this.img.removeEventListener( 'error', this ); |
| 1880 | }; |
| 1881 | |
| 1882 | Background.prototype.confirm = function( isLoaded, message ) { |
| 1883 | this.isLoaded = isLoaded; |
| 1884 | this.emitEvent( 'progress', [ this, this.element, message ] ); |
| 1885 | }; |
| 1886 | |
| 1887 | // -------------------------- jQuery -------------------------- // |
| 1888 | |
| 1889 | ImagesLoaded.makeJQueryPlugin = function( jQuery ) { |
| 1890 | jQuery = jQuery || window.jQuery; |
| 1891 | if ( !jQuery ) { |
| 1892 | return; |
| 1893 | } |
| 1894 | // set local variable |
| 1895 | $ = jQuery; |
| 1896 | // $().imagesLoaded() |
| 1897 | $.fn.imagesLoaded = function( options, callback ) { |
| 1898 | var instance = new ImagesLoaded( this, options, callback ); |
| 1899 | return instance.jqDeferred.promise( $(this) ); |
| 1900 | }; |
| 1901 | }; |
| 1902 | // try making plugin |
| 1903 | ImagesLoaded.makeJQueryPlugin(); |
| 1904 | |
| 1905 | // -------------------------- -------------------------- // |
| 1906 | |
| 1907 | return ImagesLoaded; |
| 1908 | |
| 1909 | }); |
| 1910 |