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