src/effects.js

   1 (function( jQuery ) {
   2
   3 var elemdisplay = {},
   4         rfxtypes = /^(?:toggle|show|hide)$/,
   5         rfxnum = /^([+\-]=)?([\d+.\-]+)(.*)$/,
   6         timerId,
   7         fxAttrs = [
   8                 // height animations
   9                 [ "height", "marginTop", "marginBottom", "paddingTop", "paddingBottom" ],
  10                 // width animations
  11                 [ "width", "marginLeft", "marginRight", "paddingLeft", "paddingRight" ],
  12                 // opacity animations
  13                 [ "opacity" ]
  14         ];
  15
  16 jQuery.fn.extend({
  17         show: function( speed, easing, callback ) {
  18                 var elem, display;
  19
  20                 if ( speed || speed === 0 ) {
  21                         return this.animate( genFx("show", 3), speed, easing, callback);
  22
  23                 } else {
  24                         for ( var i = 0, j = this.length; i < j; i++ ) {
  25                                 elem = this[i];
  26                                 display = elem.style.display;
  27
  28                                 // Reset the inline display of this element to learn if it is
  29                                 // being hidden by cascaded rules or not
  30                                 if ( !jQuery.data(elem, "olddisplay") && display === "none" ) {
  31                                         display = elem.style.display = "";
  32                                 }
  33
  34                                 // Set elements which have been overridden with display: none
  35                                 // in a stylesheet to whatever the default browser style is
  36                                 // for such an element
  37                                 if ( display === "" && jQuery.css( elem, "display" ) === "none" ) {
  38                                         jQuery.data(elem, "olddisplay", defaultDisplay(elem.nodeName));
  39                                 }
  40                         }
  41
  42                         // Set the display of most of the elements in a second loop
  43                         // to avoid the constant reflow
  44                         for ( i = 0; i < j; i++ ) {
  45                                 elem = this[i];
  46                                 display = elem.style.display;
  47
  48                                 if ( display === "" || display === "none" ) {
  49                                         elem.style.display = jQuery.data(elem, "olddisplay") || "";
  50                                 }
  51                         }
  52
  53                         return this;
  54                 }
  55         },
  56
  57         hide: function( speed, easing, callback ) {
  58                 if ( speed || speed === 0 ) {
  59                         return this.animate( genFx("hide", 3), speed, easing, callback);
  60
  61                 } else {
  62                         for ( var i = 0, j = this.length; i < j; i++ ) {
  63                                 var display = jQuery.css( this[i], "display" ),
  64                                     old = jQuery.data( this[i], "olddisplay" );
  65
  66                                 if ( !old && display !== "none" ) {
  67                                           jQuery.data( this[i], "olddisplay", display );
  68                           }
  69                         }
  70
  71                         // Set the display of the elements in a second loop
  72                         // to avoid the constant reflow
  73                         for ( i = 0; i < j; i++ ) {
  74                                 this[i].style.display = "none";
  75                         }
  76
  77                         return this;
  78                 }
  79         },
  80
  81         // Save the old toggle function
  82         _toggle: jQuery.fn.toggle,
  83
  84         toggle: function( fn, fn2, callback ) {
  85                 var bool = typeof fn === "boolean";
  86
  87                 if ( jQuery.isFunction(fn) && jQuery.isFunction(fn2) ) {
  88                         this._toggle.apply( this, arguments );
  89
  90                 } else if ( fn == null || bool ) {
  91                         this.each(function() {
  92                                 var state = bool ? fn : jQuery(this).is(":hidden");
  93                                 jQuery(this)[ state ? "show" : "hide" ]();
  94                         });
  95
  96                 } else {
  97                         this.animate(genFx("toggle", 3), fn, fn2, callback);
  98                 }
  99
 100                 return this;
 101         },
 102
 103         fadeTo: function( speed, to, easing, callback ) {
 104                 return this.filter(":hidden").css("opacity", 0).show().end()
 105                                         .animate({opacity: to}, speed, easing, callback);
 106         },
 107
 108         animate: function( prop, speed, easing, callback ) {
 109                 var optall = jQuery.speed(speed, easing, callback);
 110
 111                 if ( jQuery.isEmptyObject( prop ) ) {
 112                         return this.each( optall.complete );
 113                 }
 114
 115                 return this[ optall.queue === false ? "each" : "queue" ](function() {
 116                         // XXX 'this' does not always have a nodeName when running the
 117                         // test suite
 118
 119                         var opt = jQuery.extend({}, optall), p,
 120                                 isElement = this.nodeType === 1,
 121                                 hidden = isElement && jQuery(this).is(":hidden"),
 122                                 self = this;
 123
 124                         for ( p in prop ) {
 125                                 var name = jQuery.camelCase( p );
 126
 127                                 if ( p !== name ) {
 128                                         prop[ name ] = prop[ p ];
 129                                         delete prop[ p ];
 130                                         p = name;
 131                                 }
 132
 133                                 if ( prop[p] === "hide" && hidden || prop[p] === "show" && !hidden ) {
 134                                         return opt.complete.call(this);
 135                                 }
 136
 137                                 if ( isElement && ( p === "height" || p === "width" ) ) {
 138                                         // Make sure that nothing sneaks out
 139                                         // Record all 3 overflow attributes because IE does not
 140                                         // change the overflow attribute when overflowX and
 141                                         // overflowY are set to the same value
 142                                         opt.overflow = [ this.style.overflow, this.style.overflowX, this.style.overflowY ];
 143
 144                                         // Set display property to inline-block for height/width
 145                                         // animations on inline elements that are having width/height
 146                                         // animated
 147                                         if ( jQuery.css( this, "display" ) === "inline" &&
 148                                                         jQuery.css( this, "float" ) === "none" ) {
 149                                                 if ( !jQuery.support.inlineBlockNeedsLayout ) {
 150                                                         this.style.display = "inline-block";
 151
 152                                                 } else {
 153                                                         var display = defaultDisplay(this.nodeName);
 154
 155                                                         // inline-level elements accept inline-block;
 156                                                         // block-level elements need to be inline with layout
 157                                                         if ( display === "inline" ) {
 158                                                                 this.style.display = "inline-block";
 159
 160                                                         } else {
 161                                                                 this.style.display = "inline";
 162                                                                 this.style.zoom = 1;
 163                                                         }
 164                                                 }
 165                                         }
 166                                 }
 167
 168                                 if ( jQuery.isArray( prop[p] ) ) {
 169                                         // Create (if needed) and add to specialEasing
 170                                         (opt.specialEasing = opt.specialEasing || {})[p] = prop[p][1];
 171                                         prop[p] = prop[p][0];
 172                                 }
 173                         }
 174
 175                         if ( opt.overflow != null ) {
 176                                 this.style.overflow = "hidden";
 177                         }
 178
 179                         opt.curAnim = jQuery.extend({}, prop);
 180
 181                         jQuery.each( prop, function( name, val ) {
 182                                 var e = new jQuery.fx( self, opt, name );
 183
 184                                 if ( rfxtypes.test(val) ) {
 185                                         e[ val === "toggle" ? hidden ? "show" : "hide" : val ]( prop );
 186
 187                                 } else {
 188                                         var parts = rfxnum.exec(val),
 189                                                 start = e.cur() || 0;
 190
 191                                         if ( parts ) {
 192                                                 var end = parseFloat( parts[2] ),
 193                                                         unit = parts[3] || "px";
 194
 195                                                 // We need to compute starting value
 196                                                 if ( unit !== "px" ) {
 197                                                         jQuery.style( self, name, (end || 1) + unit);
 198                                                         start = ((end || 1) / e.cur()) * start;
 199                                                         jQuery.style( self, name, start + unit);
 200                                                 }
 201
 202                                                 // If a +=/-= token was provided, we're doing a relative animation
 203                                                 if ( parts[1] ) {
 204                                                         end = ((parts[1] === "-=" ? -1 : 1) * end) + start;
 205                                                 }
 206
 207                                                 e.custom( start, end, unit );
 208
 209                                         } else {
 210                                                 e.custom( start, val, "" );
 211                                         }
 212                                 }
 213                         });
 214
 215                         // For JS strict compliance
 216                         return true;
 217                 });
 218         },
 219
 220         stop: function( clearQueue, gotoEnd ) {
 221                 var timers = jQuery.timers;
 222
 223                 if ( clearQueue ) {
 224                         this.queue([]);
 225                 }
 226
 227                 this.each(function() {
 228                         // go in reverse order so anything added to the queue during the loop is ignored
 229                         for ( var i = timers.length - 1; i >= 0; i-- ) {
 230                                 if ( timers[i].elem === this ) {
 231                                         if (gotoEnd) {
 232                                                 // force the next step to be the last
 233                                                 timers[i](true);
 234                                         }
 235
 236                                         timers.splice(i, 1);
 237                                 }
 238                         }
 239                 });
 240
 241                 // start the next in the queue if the last step wasn't forced
 242                 if ( !gotoEnd ) {
 243                         this.dequeue();
 244                 }
 245
 246                 return this;
 247         }
 248
 249 });
 250
 251 function genFx( type, num ) {
 252         var obj = {};
 253
 254         jQuery.each( fxAttrs.concat.apply([], fxAttrs.slice(0,num)), function() {
 255                 obj[ this ] = type;
 256         });
 257
 258         return obj;
 259 }
 260
 261 // Generate shortcuts for custom animations
 262 jQuery.each({
 263         slideDown: genFx("show", 1),
 264         slideUp: genFx("hide", 1),
 265         slideToggle: genFx("toggle", 1),
 266         fadeIn: { opacity: "show" },
 267         fadeOut: { opacity: "hide" },
 268         fadeToggle: { opacity: "toggle" }
 269 }, function( name, props ) {
 270         jQuery.fn[ name ] = function( speed, easing, callback ) {
 271                 return this.animate( props, speed, easing, callback );
 272         };
 273 });
 274
 275 jQuery.extend({
 276         speed: function( speed, easing, fn ) {
 277                 var opt = speed && typeof speed === "object" ? jQuery.extend({}, speed) : {
 278                         complete: fn || !fn && easing ||
 279                                 jQuery.isFunction( speed ) && speed,
 280                         duration: speed,
 281                         easing: fn && easing || easing && !jQuery.isFunction(easing) && easing
 282                 };
 283
 284                 opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
 285                         opt.duration in jQuery.fx.speeds ? jQuery.fx.speeds[opt.duration] : jQuery.fx.speeds._default;
 286
 287                 // Queueing
 288                 opt.old = opt.complete;
 289                 opt.complete = function() {
 290                         if ( opt.queue !== false ) {
 291                                 jQuery(this).dequeue();
 292                         }
 293                         if ( jQuery.isFunction( opt.old ) ) {
 294                                 opt.old.call( this );
 295                         }
 296                 };
 297
 298                 return opt;
 299         },
 300
 301         easing: {
 302                 linear: function( p, n, firstNum, diff ) {
 303                         return firstNum + diff * p;
 304                 },
 305                 swing: function( p, n, firstNum, diff ) {
 306                         return ((-Math.cos(p*Math.PI)/2) + 0.5) * diff + firstNum;
 307                 }
 308         },
 309
 310         timers: [],
 311
 312         fx: function( elem, options, prop ) {
 313                 this.options = options;
 314                 this.elem = elem;
 315                 this.prop = prop;
 316
 317                 if ( !options.orig ) {
 318                         options.orig = {};
 319                 }
 320         }
 321
 322 });
 323
 324 jQuery.fx.prototype = {
 325         // Simple function for setting a style value
 326         update: function() {
 327                 if ( this.options.step ) {
 328                         this.options.step.call( this.elem, this.now, this );
 329                 }
 330
 331                 (jQuery.fx.step[this.prop] || jQuery.fx.step._default)( this );
 332         },
 333
 334         // Get the current size
 335         cur: function() {
 336                 if ( this.elem[this.prop] != null && (!this.elem.style || this.elem.style[this.prop] == null) ) {
 337                         return this.elem[ this.prop ];
 338                 }
 339
 340                 var r = parseFloat( jQuery.css( this.elem, this.prop ) );
 341                 return r && r > -10000 ? r : 0;
 342         },
 343
 344         // Start an animation from one number to another
 345         custom: function( from, to, unit ) {
 346                 var self = this,
 347                         fx = jQuery.fx;
 348
 349                 this.startTime = jQuery.now();
 350                 this.start = from;
 351                 this.end = to;
 352                 this.unit = unit || this.unit || "px";
 353                 this.now = this.start;
 354                 this.pos = this.state = 0;
 355
 356                 function t( gotoEnd ) {
 357                         return self.step(gotoEnd);
 358                 }
 359
 360                 t.elem = this.elem;
 361
 362                 if ( t() && jQuery.timers.push(t) && !timerId ) {
 363                         timerId = setInterval(fx.tick, fx.interval);
 364                 }
 365         },
 366
 367         // Simple 'show' function
 368         show: function() {
 369                 // Remember where we started, so that we can go back to it later
 370                 this.options.orig[this.prop] = jQuery.style( this.elem, this.prop );
 371                 this.options.show = true;
 372
 373                 // Begin the animation
 374                 // Make sure that we start at a small width/height to avoid any
 375                 // flash of content
 376                 this.custom(this.prop === "width" || this.prop === "height" ? 1 : 0, this.cur());
 377
 378                 // Start by showing the element
 379                 jQuery( this.elem ).show();
 380         },
 381
 382         // Simple 'hide' function
 383         hide: function() {
 384                 // Remember where we started, so that we can go back to it later
 385                 this.options.orig[this.prop] = jQuery.style( this.elem, this.prop );
 386                 this.options.hide = true;
 387
 388                 // Begin the animation
 389                 this.custom(this.cur(), 0);
 390         },
 391
 392         // Each step of an animation
 393         step: function( gotoEnd ) {
 394                 var t = jQuery.now(), done = true;
 395
 396                 if ( gotoEnd || t >= this.options.duration + this.startTime ) {
 397                         this.now = this.end;
 398                         this.pos = this.state = 1;
 399                         this.update();
 400
 401                         this.options.curAnim[ this.prop ] = true;
 402
 403                         for ( var i in this.options.curAnim ) {
 404                                 if ( this.options.curAnim[i] !== true ) {
 405                                         done = false;
 406                                 }
 407                         }
 408
 409                         if ( done ) {
 410                                 // Reset the overflow
 411                                 if ( this.options.overflow != null && !jQuery.support.shrinkWrapBlocks ) {
 412                                         var elem = this.elem,
 413                                                 options = this.options;
 414
 415                                         jQuery.each( [ "", "X", "Y" ], function (index, value) {
 416                                                 elem.style[ "overflow" + value ] = options.overflow[index];
 417                                         } );
 418                                 }
 419
 420                                 // Hide the element if the "hide" operation was done
 421                                 if ( this.options.hide ) {
 422                                         jQuery(this.elem).hide();
 423                                 }
 424
 425                                 // Reset the properties, if the item has been hidden or shown
 426                                 if ( this.options.hide || this.options.show ) {
 427                                         for ( var p in this.options.curAnim ) {
 428                                                 jQuery.style( this.elem, p, this.options.orig[p] );
 429                                         }
 430                                 }
 431
 432                                 // Execute the complete function
 433                                 this.options.complete.call( this.elem );
 434                         }
 435
 436                         return false;
 437
 438                 } else {
 439                         var n = t - this.startTime;
 440                         this.state = n / this.options.duration;
 441
 442                         // Perform the easing function, defaults to swing
 443                         var specialEasing = this.options.specialEasing && this.options.specialEasing[this.prop];
 444                         var defaultEasing = this.options.easing || (jQuery.easing.swing ? "swing" : "linear");
 445                         this.pos = jQuery.easing[specialEasing || defaultEasing](this.state, n, 0, 1, this.options.duration);
 446                         this.now = this.start + ((this.end - this.start) * this.pos);
 447
 448                         // Perform the next step of the animation
 449                         this.update();
 450                 }
 451
 452                 return true;
 453         }
 454 };
 455
 456 jQuery.extend( jQuery.fx, {
 457         tick: function() {
 458                 var timers = jQuery.timers;
 459
 460                 for ( var i = 0; i < timers.length; i++ ) {
 461                         if ( !timers[i]() ) {
 462                                 timers.splice(i--, 1);
 463                         }
 464                 }
 465
 466                 if ( !timers.length ) {
 467                         jQuery.fx.stop();
 468                 }
 469         },
 470
 471         interval: 13,
 472
 473         stop: function() {
 474                 clearInterval( timerId );
 475                 timerId = null;
 476         },
 477
 478         speeds: {
 479                 slow: 600,
 480                 fast: 200,
 481                 // Default speed
 482                 _default: 400
 483         },
 484
 485         step: {
 486                 opacity: function( fx ) {
 487                         jQuery.style( fx.elem, "opacity", fx.now );
 488                 },
 489
 490                 _default: function( fx ) {
 491                         if ( fx.elem.style && fx.elem.style[ fx.prop ] != null ) {
 492                                 fx.elem.style[ fx.prop ] = (fx.prop === "width" || fx.prop === "height" ? Math.max(0, fx.now) : fx.now) + fx.unit;
 493                         } else {
 494                                 fx.elem[ fx.prop ] = fx.now;
 495                         }
 496                 }
 497         }
 498 });
 499
 500 if ( jQuery.expr && jQuery.expr.filters ) {
 501         jQuery.expr.filters.animated = function( elem ) {
 502                 return jQuery.grep(jQuery.timers, function( fn ) {
 503                         return elem === fn.elem;
 504                 }).length;
 505         };
 506 }
 507
 508 function defaultDisplay( nodeName ) {
 509         if ( !elemdisplay[ nodeName ] ) {
 510                 var elem = jQuery("<" + nodeName + ">").appendTo("body"),
 511                         display = elem.css("display");
 512
 513                 elem.remove();
 514
 515                 if ( display === "none" || display === "" ) {
 516                         display = "block";
 517                 }
 518
 519                 elemdisplay[ nodeName ] = display;
 520         }
 521
 522         return elemdisplay[ nodeName ];
 523 }
 524
 525 })( jQuery );