src/fx.js

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