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 ) {
  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 tagName = this[i].tagName, display;
  32
  33                                         if ( elemdisplay[ tagName ] ) {
  34                                                 display = elemdisplay[ tagName ];
  35                                         } else {
  36                                                 var elem = jQuery("<" + tagName + " />").appendTo("body");
  37
  38                                                 display = elem.css("display");
  39                                                 if ( display === "none" )
  40                                                         display = "block";
  41
  42                                                 elem.remove();
  43
  44                                                 elemdisplay[ tagName ] = 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 ) {
  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                         // Set the display of the elements in a second loop
  72                         // to avoid the constant reflow
  73                         for ( var i = 0, l = this.length; i < l; i++ ){
  74                                 this[i].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                 return jQuery.isFunction(fn) && jQuery.isFunction(fn2) ?
  88                         this._toggle.apply( this, arguments ) :
  89                         fn == null || bool ?
  90                                 this.each(function(){
  91                                         var state = bool ? fn : jQuery(this).is(":hidden");
  92                                         jQuery(this)[ state ? "show" : "hide" ]();
  93                                 }) :
  94                                 this.animate(genFx("toggle", 3), fn, fn2);
  95         },
  96
  97         fadeTo: function(speed,to,callback){
  98                 return this.filter(":hidden").css('opacity', 0).show().end()
  99                                         .animate({opacity: to}, speed, callback);
 100         },
 101
 102         animate: function( prop, speed, easing, callback ) {
 103                 var optall = jQuery.speed(speed, easing, callback);
 104
 105                 return this[ optall.queue === false ? "each" : "queue" ](function(){
 106
 107                         var opt = jQuery.extend({}, optall), p,
 108                                 hidden = this.nodeType == 1 && jQuery(this).is(":hidden"),
 109                                 self = this;
 110
 111                         for ( p in prop ) {
 112                                 if ( prop[p] == "hide" && hidden || prop[p] == "show" && !hidden )
 113                                         return opt.complete.call(this);
 114
 115                                 if ( ( p == "height" || p == "width" ) && this.style ) {
 116                                         // Store display property
 117                                         opt.display = jQuery.css(this, "display");
 118
 119                                         // Make sure that nothing sneaks out
 120                                         opt.overflow = this.style.overflow;
 121                                 }
 122                         }
 123
 124                         if ( opt.overflow != null )
 125                                 this.style.overflow = "hidden";
 126
 127                         opt.curAnim = jQuery.extend({}, prop);
 128
 129                         jQuery.each( prop, function(name, val){
 130                                 var e = new jQuery.fx( self, opt, name );
 131
 132                                 if ( /toggle|show|hide/.test(val) )
 133                                         e[ val == "toggle" ? hidden ? "show" : "hide" : val ]( prop );
 134                                 else {
 135                                         var parts = val.toString().match(/^([+-]=)?([\d+-.]+)(.*)$/),
 136                                                 start = e.cur(true) || 0;
 137
 138                                         if ( parts ) {
 139                                                 var end = parseFloat(parts[2]),
 140                                                         unit = parts[3] || "px";
 141
 142                                                 // We need to compute starting value
 143                                                 if ( unit != "px" ) {
 144                                                         self.style[ name ] = (end || 1) + unit;
 145                                                         start = ((end || 1) / e.cur(true)) * start;
 146                                                         self.style[ name ] = start + unit;
 147                                                 }
 148
 149                                                 // If a +=/-= token was provided, we're doing a relative animation
 150                                                 if ( parts[1] )
 151                                                         end = ((parts[1] == "-=" ? -1 : 1) * end) + start;
 152
 153                                                 e.custom( start, end, unit );
 154                                         } else
 155                                                 e.custom( start, val, "" );
 156                                 }
 157                         });
 158
 159                         // For JS strict compliance
 160                         return true;
 161                 });
 162         },
 163
 164         stop: function(clearQueue, gotoEnd){
 165                 var timers = jQuery.timers;
 166
 167                 if (clearQueue)
 168                         this.queue([]);
 169
 170                 this.each(function(){
 171                         // go in reverse order so anything added to the queue during the loop is ignored
 172                         for ( var i = timers.length - 1; i >= 0; i-- )
 173                                 if ( timers[i].elem == this ) {
 174                                         if (gotoEnd)
 175                                                 // force the next step to be the last
 176                                                 timers[i](true);
 177                                         timers.splice(i, 1);
 178                                 }
 179                 });
 180
 181                 // start the next in the queue if the last step wasn't forced
 182                 if (!gotoEnd)
 183                         this.dequeue();
 184
 185                 return this;
 186         }
 187
 188 });
 189
 190 // Generate shortcuts for custom animations
 191 jQuery.each({
 192         slideDown: genFx("show", 1),
 193         slideUp: genFx("hide", 1),
 194         slideToggle: genFx("toggle", 1),
 195         fadeIn: { opacity: "show" },
 196         fadeOut: { opacity: "hide" }
 197 }, function( name, props ){
 198         jQuery.fn[ name ] = function( speed, callback ){
 199                 return this.animate( props, speed, callback );
 200         };
 201 });
 202
 203 jQuery.extend({
 204
 205         speed: function(speed, easing, fn) {
 206                 var opt = typeof speed === "object" ? speed : {
 207                         complete: fn || !fn && easing ||
 208                                 jQuery.isFunction( speed ) && speed,
 209                         duration: speed,
 210                         easing: fn && easing || easing && !jQuery.isFunction(easing) && easing
 211                 };
 212
 213                 opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
 214                         jQuery.fx.speeds[opt.duration] || jQuery.fx.speeds._default;
 215
 216                 // Queueing
 217                 opt.old = opt.complete;
 218                 opt.complete = function(){
 219                         if ( opt.queue !== false )
 220                                 jQuery(this).dequeue();
 221                         if ( jQuery.isFunction( opt.old ) )
 222                                 opt.old.call( this );
 223                 };
 224
 225                 return opt;
 226         },
 227
 228         easing: {
 229                 linear: function( p, n, firstNum, diff ) {
 230                         return firstNum + diff * p;
 231                 },
 232                 swing: function( p, n, firstNum, diff ) {
 233                         return ((-Math.cos(p*Math.PI)/2) + 0.5) * diff + firstNum;
 234                 }
 235         },
 236
 237         timers: [],
 238
 239         fx: function( elem, options, prop ){
 240                 this.options = options;
 241                 this.elem = elem;
 242                 this.prop = prop;
 243
 244                 if ( !options.orig )
 245                         options.orig = {};
 246         }
 247
 248 });
 249
 250 jQuery.fx.prototype = {
 251
 252         // Simple function for setting a style value
 253         update: function(){
 254                 if ( this.options.step )
 255                         this.options.step.call( this.elem, this.now, this );
 256
 257                 (jQuery.fx.step[this.prop] || jQuery.fx.step._default)( this );
 258
 259                 // Set display property to block for height/width animations
 260                 if ( ( this.prop == "height" || this.prop == "width" ) && this.elem.style )
 261                         this.elem.style.display = "block";
 262         },
 263
 264         // Get the current size
 265         cur: function(force){
 266                 if ( this.elem[this.prop] != null && (!this.elem.style || this.elem.style[this.prop] == null) )
 267                         return this.elem[ this.prop ];
 268
 269                 var r = parseFloat(jQuery.css(this.elem, this.prop, force));
 270                 return r && r > -10000 ? r : parseFloat(jQuery.curCSS(this.elem, this.prop)) || 0;
 271         },
 272
 273         // Start an animation from one number to another
 274         custom: function(from, to, unit){
 275                 this.startTime = now();
 276                 this.start = from;
 277                 this.end = to;
 278                 this.unit = unit || this.unit || "px";
 279                 this.now = this.start;
 280                 this.pos = this.state = 0;
 281
 282                 var self = this;
 283                 function t(gotoEnd){
 284                         return self.step(gotoEnd);
 285                 }
 286
 287                 t.elem = this.elem;
 288
 289                 if ( t() && jQuery.timers.push(t) && !timerId ) {
 290                         timerId = setInterval(function(){
 291                                 var timers = jQuery.timers;
 292
 293                                 for ( var i = 0; i < timers.length; i++ )
 294                                         if ( !timers[i]() )
 295                                                 timers.splice(i--, 1);
 296
 297                                 if ( !timers.length ) {
 298                                         clearInterval( timerId );
 299                                         timerId = undefined;
 300                                 }
 301                         }, 13);
 302                 }
 303         },
 304
 305         // Simple 'show' function
 306         show: function(){
 307                 // Remember where we started, so that we can go back to it later
 308                 this.options.orig[this.prop] = jQuery.attr( this.elem.style, this.prop );
 309                 this.options.show = true;
 310
 311                 // Begin the animation
 312                 // Make sure that we start at a small width/height to avoid any
 313                 // flash of content
 314                 this.custom(this.prop == "width" || this.prop == "height" ? 1 : 0, this.cur());
 315
 316                 // Start by showing the element
 317                 jQuery(this.elem).show();
 318         },
 319
 320         // Simple 'hide' function
 321         hide: function(){
 322                 // Remember where we started, so that we can go back to it later
 323                 this.options.orig[this.prop] = jQuery.attr( this.elem.style, this.prop );
 324                 this.options.hide = true;
 325
 326                 // Begin the animation
 327                 this.custom(this.cur(), 0);
 328         },
 329
 330         // Each step of an animation
 331         step: function(gotoEnd){
 332                 var t = now();
 333
 334                 if ( gotoEnd || t >= this.options.duration + this.startTime ) {
 335                         this.now = this.end;
 336                         this.pos = this.state = 1;
 337                         this.update();
 338
 339                         this.options.curAnim[ this.prop ] = true;
 340
 341                         var done = true;
 342                         for ( var i in this.options.curAnim )
 343                                 if ( this.options.curAnim[i] !== true )
 344                                         done = false;
 345
 346                         if ( done ) {
 347                                 if ( this.options.display != null ) {
 348                                         // Reset the overflow
 349                                         this.elem.style.overflow = this.options.overflow;
 350
 351                                         // Reset the display
 352                                         this.elem.style.display = this.options.display;
 353                                         if ( jQuery.css(this.elem, "display") == "none" )
 354                                                 this.elem.style.display = "block";
 355                                 }
 356
 357                                 // Hide the element if the "hide" operation was done
 358                                 if ( this.options.hide )
 359                                         jQuery(this.elem).hide();
 360
 361                                 // Reset the properties, if the item has been hidden or shown
 362                                 if ( this.options.hide || this.options.show )
 363                                         for ( var p in this.options.curAnim )
 364                                                 jQuery.attr(this.elem.style, p, this.options.orig[p]);
 365
 366                                 // Execute the complete function
 367                                 this.options.complete.call( this.elem );
 368                         }
 369
 370                         return false;
 371                 } else {
 372                         var n = t - this.startTime;
 373                         this.state = n / this.options.duration;
 374
 375                         // Perform the easing function, defaults to swing
 376                         this.pos = jQuery.easing[this.options.easing || (jQuery.easing.swing ? "swing" : "linear")](this.state, n, 0, 1, this.options.duration);
 377                         this.now = this.start + ((this.end - this.start) * this.pos);
 378
 379                         // Perform the next step of the animation
 380                         this.update();
 381                 }
 382
 383                 return true;
 384         }
 385
 386 };
 387
 388 jQuery.extend( jQuery.fx, {
 389         speeds:{
 390                 slow: 600,
 391                 fast: 200,
 392                 // Default speed
 393                 _default: 400
 394         },
 395         step: {
 396
 397                 opacity: function(fx){
 398                         jQuery.attr(fx.elem.style, "opacity", fx.now);
 399                 },
 400
 401                 _default: function(fx){
 402                         if ( fx.elem.style && fx.elem.style[ fx.prop ] != null )
 403                                 fx.elem.style[ fx.prop ] = fx.now + fx.unit;
 404                         else
 405                                 fx.elem[ fx.prop ] = fx.now;
 406                 }
 407         }
 408 });