src/fx.js

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