src/fx.js

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