src/fx.js

   1 var elemdisplay = {},
   2         fxAttrs = [
   3                 // height animations
   4                 [ "height", "marginTop", "marginBottom", "paddingTop", "paddingBottom" ],
   5                 // width animations
   6                 [ "width", "marginLeft", "marginRight", "paddingLeft", "paddingRight" ],
   7                 // opacity animations
   8                 [ "opacity" ]
   9         ];
  10
  11 function genFx( type, num ){
  12         var obj = {};
  13         jQuery.each( fxAttrs.concat.apply([], fxAttrs.slice(0,num)), function(){
  14                 obj[ this ] = type;
  15         });
  16         return obj;
  17 }
  18
  19 jQuery.fn.extend({
  20         show: function(speed,callback){
  21                 if ( speed ) {
  22                         return this.animate( genFx("show", 3), speed, callback);
  23                 } else {
  24                         for ( var i = 0, l = this.length; i < l; i++ ){
  25                                 var old = jQuery.data(this[i], "olddisplay");
  26
  27                                 this[i].style.display = old || "";
  28
  29                                 if ( jQuery.css(this[i], "display") === "none" ) {
  30                                         var tagName = this[i].tagName, display;
  31
  32                                         if ( elemdisplay[ tagName ] ) {
  33                                                 display = elemdisplay[ tagName ];
  34                                         } else {
  35                                                 var elem = jQuery("<" + tagName + " />").appendTo("body");
  36
  37                                                 display = elem.css("display");
  38                                                 if ( display === "none" )
  39                                                         display = "block";
  40
  41                                                 elem.remove();
  42
  43                                                 elemdisplay[ tagName ] = display;
  44                                         }
  45
  46                                         this[i].style.display = jQuery.data(this[i], "olddisplay", display);
  47                                 }
  48                         }
  49
  50                         return this;
  51                 }
  52         },
  53
  54         hide: function(speed,callback){
  55                 if ( speed ) {
  56                         return this.animate( genFx("hide", 3), speed, callback);
  57                 } else {
  58                         for ( var i = 0, l = this.length; i < l; i++ ){
  59                                 var old = jQuery.data(this[i], "olddisplay");
  60                                 if ( !old && old !== "none" )
  61                                         jQuery.data(this[i], "olddisplay", jQuery.css(this[i], "display"));
  62                                 this[i].style.display = "none";
  63                         }
  64                         return this;
  65                 }
  66         },
  67
  68         // Save the old toggle function
  69         _toggle: jQuery.fn.toggle,
  70
  71         toggle: function( fn, fn2 ){
  72                 var bool = typeof fn === "boolean";
  73
  74                 return jQuery.isFunction(fn) && jQuery.isFunction(fn2) ?
  75                         this._toggle.apply( this, arguments ) :
  76                         fn == null || bool ?
  77                                 this.each(function(){
  78                                         var state = bool ? fn : jQuery(this).is(":hidden");
  79                                         jQuery(this)[ state ? "show" : "hide" ]();
  80                                 }) :
  81                                 this.animate(genFx("toggle", 3), fn, fn2);
  82         },
  83
  84         fadeTo: function(speed,to,callback){
  85                 return this.animate({opacity: to}, speed, callback);
  86         },
  87
  88         animate: function( prop, speed, easing, callback ) {
  89                 var optall = jQuery.speed(speed, easing, callback);
  90
  91                 return this[ optall.queue === false ? "each" : "queue" ](function(){
  92
  93                         var opt = jQuery.extend({}, optall), p,
  94                                 hidden = this.nodeType == 1 && jQuery(this).is(":hidden"),
  95                                 self = this;
  96
  97                         for ( p in prop ) {
  98                                 if ( prop[p] == "hide" && hidden || prop[p] == "show" && !hidden )
  99                                         return opt.complete.call(this);
 100
 101                                 if ( ( p == "height" || p == "width" ) && this.style ) {
 102                                         // Store display property
 103                                         opt.display = jQuery.css(this, "display");
 104
 105                                         // Make sure that nothing sneaks out
 106                                         opt.overflow = this.style.overflow;
 107                                 }
 108                         }
 109
 110                         if ( opt.overflow != null )
 111                                 this.style.overflow = "hidden";
 112
 113                         opt.curAnim = jQuery.extend({}, prop);
 114
 115                         jQuery.each( prop, function(name, val){
 116                                 var e = new jQuery.fx( self, opt, name );
 117
 118                                 if ( /toggle|show|hide/.test(val) )
 119                                         e[ val == "toggle" ? hidden ? "show" : "hide" : val ]( prop );
 120                                 else {
 121                                         var parts = val.toString().match(/^([+-]=)?([\d+-.]+)(.*)$/),
 122                                                 start = e.cur(true) || 0;
 123
 124                                         if ( parts ) {
 125                                                 var end = parseFloat(parts[2]),
 126                                                         unit = parts[3] || "px";
 127
 128                                                 // We need to compute starting value
 129                                                 if ( unit != "px" ) {
 130                                                         self.style[ name ] = (end || 1) + unit;
 131                                                         start = ((end || 1) / e.cur(true)) * start;
 132                                                         self.style[ name ] = start + unit;
 133                                                 }
 134
 135                                                 // If a +=/-= token was provided, we're doing a relative animation
 136                                                 if ( parts[1] )
 137                                                         end = ((parts[1] == "-=" ? -1 : 1) * end) + start;
 138
 139                                                 e.custom( start, end, unit );
 140                                         } else
 141                                                 e.custom( start, val, "" );
 142                                 }
 143                         });
 144
 145                         // For JS strict compliance
 146                         return true;
 147                 });
 148         },
 149
 150         stop: function(clearQueue, gotoEnd){
 151                 var timers = jQuery.timers;
 152
 153                 if (clearQueue)
 154                         this.queue([]);
 155
 156                 this.each(function(){
 157                         // go in reverse order so anything added to the queue during the loop is ignored
 158                         for ( var i = timers.length - 1; i >= 0; i-- )
 159                                 if ( timers[i].elem == this ) {
 160                                         if (gotoEnd)
 161                                                 // force the next step to be the last
 162                                                 timers[i](true);
 163                                         timers.splice(i, 1);
 164                                 }
 165                 });
 166
 167                 // start the next in the queue if the last step wasn't forced
 168                 if (!gotoEnd)
 169                         this.dequeue();
 170
 171                 return this;
 172         }
 173
 174 });
 175
 176 // Generate shortcuts for custom animations
 177 jQuery.each({
 178         slideDown: genFx("show", 1),
 179         slideUp: genFx("hide", 1),
 180         slideToggle: genFx("toggle", 1),
 181         fadeIn: { opacity: "show" },
 182         fadeOut: { opacity: "hide" }
 183 }, function( name, props ){
 184         jQuery.fn[ name ] = function( speed, callback ){
 185                 return this.animate( props, speed, callback );
 186         };
 187 });
 188
 189 jQuery.extend({
 190
 191         speed: function(speed, easing, fn) {
 192                 var opt = typeof speed === "object" ? speed : {
 193                         complete: fn || !fn && easing ||
 194                                 jQuery.isFunction( speed ) && speed,
 195                         duration: speed,
 196                         easing: fn && easing || easing && !jQuery.isFunction(easing) && easing
 197                 };
 198
 199                 opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
 200                         jQuery.fx.speeds[opt.duration] || jQuery.fx.speeds._default;
 201
 202                 // Queueing
 203                 opt.old = opt.complete;
 204                 opt.complete = function(){
 205                         if ( opt.queue !== false )
 206                                 jQuery(this).dequeue();
 207                         if ( jQuery.isFunction( opt.old ) )
 208                                 opt.old.call( this );
 209                 };
 210
 211                 return opt;
 212         },
 213
 214         easing: {
 215                 linear: function( p, n, firstNum, diff ) {
 216                         return firstNum + diff * p;
 217                 },
 218                 swing: function( p, n, firstNum, diff ) {
 219                         return ((-Math.cos(p*Math.PI)/2) + 0.5) * diff + firstNum;
 220                 }
 221         },
 222
 223         timers: [],
 224         timerId: null,
 225
 226         fx: function( elem, options, prop ){
 227                 this.options = options;
 228                 this.elem = elem;
 229                 this.prop = prop;
 230
 231                 if ( !options.orig )
 232                         options.orig = {};
 233         }
 234
 235 });
 236
 237 jQuery.fx.prototype = {
 238
 239         // Simple function for setting a style value
 240         update: function(){
 241                 if ( this.options.step )
 242                         this.options.step.call( this.elem, this.now, this );
 243
 244                 (jQuery.fx.step[this.prop] || jQuery.fx.step._default)( this );
 245
 246                 // Set display property to block for height/width animations
 247                 if ( ( this.prop == "height" || this.prop == "width" ) && this.elem.style )
 248                         this.elem.style.display = "block";
 249         },
 250
 251         // Get the current size
 252         cur: function(force){
 253                 if ( this.elem[this.prop] != null && (!this.elem.style || this.elem.style[this.prop] == null) )
 254                         return this.elem[ this.prop ];
 255
 256                 var r = parseFloat(jQuery.css(this.elem, this.prop, force));
 257                 return r && r > -10000 ? r : parseFloat(jQuery.curCSS(this.elem, this.prop)) || 0;
 258         },
 259
 260         // Start an animation from one number to another
 261         custom: function(from, to, unit){
 262                 this.startTime = now();
 263                 this.start = from;
 264                 this.end = to;
 265                 this.unit = unit || this.unit || "px";
 266                 this.now = this.start;
 267                 this.pos = this.state = 0;
 268
 269                 var self = this;
 270                 function t(gotoEnd){
 271                         return self.step(gotoEnd);
 272                 }
 273
 274                 t.elem = this.elem;
 275
 276                 jQuery.timers.push(t);
 277
 278                 if ( t() && jQuery.timerId == null ) {
 279                         jQuery.timerId = setInterval(function(){
 280                                 var timers = jQuery.timers;
 281
 282                                 for ( var i = 0; i < timers.length; i++ )
 283                                         if ( !timers[i]() )
 284                                                 timers.splice(i--, 1);
 285
 286                                 if ( !timers.length ) {
 287                                         clearInterval( jQuery.timerId );
 288                                         jQuery.timerId = null;
 289                                 }
 290                         }, 13);
 291                 }
 292         },
 293
 294         // Simple 'show' function
 295         show: function(){
 296                 // Remember where we started, so that we can go back to it later
 297                 this.options.orig[this.prop] = jQuery.attr( this.elem.style, this.prop );
 298                 this.options.show = true;
 299
 300                 // Begin the animation
 301                 // Make sure that we start at a small width/height to avoid any
 302                 // flash of content
 303                 this.custom(this.prop == "width" || this.prop == "height" ? 1 : 0, this.cur());
 304
 305                 // Start by showing the element
 306                 jQuery(this.elem).show();
 307         },
 308
 309         // Simple 'hide' function
 310         hide: function(){
 311                 // Remember where we started, so that we can go back to it later
 312                 this.options.orig[this.prop] = jQuery.attr( this.elem.style, this.prop );
 313                 this.options.hide = true;
 314
 315                 // Begin the animation
 316                 this.custom(this.cur(), 0);
 317         },
 318
 319         // Each step of an animation
 320         step: function(gotoEnd){
 321                 var t = now();
 322
 323                 if ( gotoEnd || t >= this.options.duration + this.startTime ) {
 324                         this.now = this.end;
 325                         this.pos = this.state = 1;
 326                         this.update();
 327
 328                         this.options.curAnim[ this.prop ] = true;
 329
 330                         var done = true;
 331                         for ( var i in this.options.curAnim )
 332                                 if ( this.options.curAnim[i] !== true )
 333                                         done = false;
 334
 335                         if ( done ) {
 336                                 if ( this.options.display != null ) {
 337                                         // Reset the overflow
 338                                         this.elem.style.overflow = this.options.overflow;
 339
 340                                         // Reset the display
 341                                         this.elem.style.display = this.options.display;
 342                                         if ( jQuery.css(this.elem, "display") == "none" )
 343                                                 this.elem.style.display = "block";
 344                                 }
 345
 346                                 // Hide the element if the "hide" operation was done
 347                                 if ( this.options.hide )
 348                                         jQuery(this.elem).hide();
 349
 350                                 // Reset the properties, if the item has been hidden or shown
 351                                 if ( this.options.hide || this.options.show )
 352                                         for ( var p in this.options.curAnim )
 353                                                 jQuery.attr(this.elem.style, p, this.options.orig[p]);
 354                         }
 355
 356                         if ( done )
 357                                 // Execute the complete function
 358                                 this.options.complete.call( this.elem );
 359
 360                         return false;
 361                 } else {
 362                         var n = t - this.startTime;
 363                         this.state = n / this.options.duration;
 364
 365                         // Perform the easing function, defaults to swing
 366                         this.pos = jQuery.easing[this.options.easing || (jQuery.easing.swing ? "swing" : "linear")](this.state, n, 0, 1, this.options.duration);
 367                         this.now = this.start + ((this.end - this.start) * this.pos);
 368
 369                         // Perform the next step of the animation
 370                         this.update();
 371                 }
 372
 373                 return true;
 374         }
 375
 376 };
 377
 378 jQuery.extend( jQuery.fx, {
 379         speeds:{
 380                 slow: 600,
 381                 fast: 200,
 382                 // Default speed
 383                 _default: 400
 384         },
 385         step: {
 386
 387                 opacity: function(fx){
 388                         jQuery.attr(fx.elem.style, "opacity", fx.now);
 389                 },
 390
 391                 _default: function(fx){
 392                         if ( fx.elem.style && fx.elem.style[ fx.prop ] != null )
 393                                 fx.elem.style[ fx.prop ] = fx.now + fx.unit;
 394                         else
 395                                 fx.elem[ fx.prop ] = fx.now;
 396                 }
 397         }
 398 });