src/effects.js

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