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