src/effects.js

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