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