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