jquery/src/fx.js

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var elemdisplay = {},
timerId,
fxAttrs = [
// height animations
[ "height", "marginTop", "marginBottom", "paddingTop", "paddingBottom" ],
// width animations
[ "width", "marginLeft", "marginRight", "paddingLeft", "paddingRight" ],
// opacity animations
[ "opacity" ]
];
function genFx( type, num ){
var obj = {};
jQuery.each( fxAttrs.concat.apply([], fxAttrs.slice(0,num)), function(){
obj[ this ] = type;
});
return obj;
}
jQuery.fn.extend({
show: function( speed, callback ) {
if ( speed != null ) {
return this.animate( genFx("show", 3), speed, callback);
} else {
for ( var i = 0, l = this.length; i < l; i++ ){
var old = jQuery.data(this[i], "olddisplay");
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this[i].style.display = old || "";
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if ( jQuery.css(this[i], "display") === "none" ) {
var nodeName = this[i].nodeName, display;
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if ( elemdisplay[ nodeName ] ) {
display = elemdisplay[ nodeName ];
} else {
var elem = jQuery("<" + nodeName + " />").appendTo("body");
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display = elem.css("display");
if ( display === "none" ) {
display = "block";
}
elem.remove();
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elemdisplay[ nodeName ] = display;
}
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jQuery.data(this[i], "olddisplay", display);
}
}
// Set the display of the elements in a second loop
// to avoid the constant reflow
for ( var i = 0, l = this.length; i < l; i++ ){
this[i].style.display = jQuery.data(this[i], "olddisplay") || "";
}
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return this;
}
},
hide: function( speed, callback ) {
if ( speed != null ) {
return this.animate( genFx("hide", 3), speed, callback);
} else {
for ( var i = 0, l = this.length; i < l; i++ ){
var old = jQuery.data(this[i], "olddisplay");
if ( !old && old !== "none" ){
jQuery.data(this[i], "olddisplay", jQuery.css(this[i], "display"));
}
}
// Set the display of the elements in a second loop
// to avoid the constant reflow
for ( var i = 0, l = this.length; i < l; i++ ){
this[i].style.display = "none";
}
return this;
}
},
// Save the old toggle function
_toggle: jQuery.fn.toggle,
toggle: function( fn, fn2 ){
var bool = typeof fn === "boolean";
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return jQuery.isFunction(fn) && jQuery.isFunction(fn2) ?
this._toggle.apply( this, arguments ) :
fn == null || bool ?
this.each(function(){
var state = bool ? fn : jQuery(this).is(":hidden");
jQuery(this)[ state ? "show" : "hide" ]();
}) :
this.animate(genFx("toggle", 3), fn, fn2);
},
fadeTo: function(speed,to,callback){
return this.filter(":hidden").css('opacity', 0).show().end()
.animate({opacity: to}, speed, callback);
},
animate: function( prop, speed, easing, callback ) {
var optall = jQuery.speed(speed, easing, callback);
return this[ optall.queue === false ? "each" : "queue" ](function(){
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var opt = jQuery.extend({}, optall), p,
hidden = this.nodeType == 1 && jQuery(this).is(":hidden"),
self = this;
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for ( p in prop ) {
var name = p.replace(rdashAlpha, fcamelCase);
if ( p !== name ) {
prop[ name ] = prop[ p ];
delete prop[ p ];
p = name;
}
if ( prop[p] == "hide" && hidden || prop[p] == "show" && !hidden ) {
return opt.complete.call(this);
}
if ( ( p == "height" || p == "width" ) && this.style ) {
// Store display property
opt.display = jQuery.css(this, "display");
// Make sure that nothing sneaks out
opt.overflow = this.style.overflow;
}
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if ( jQuery.isArray( prop[p] ) ) {
// Create (if needed) and add to specialEasing
(opt.specialEasing = opt.specialEasing || {})[p] = prop[p][1];
prop[p] = prop[p][0];
}
}
if ( opt.overflow != null ) {
this.style.overflow = "hidden";
}
opt.curAnim = jQuery.extend({}, prop);
jQuery.each( prop, function(name, val){
var e = new jQuery.fx( self, opt, name );
if ( /toggle|show|hide/.test(val) ) {
e[ val == "toggle" ? hidden ? "show" : "hide" : val ]( prop );
} else {
var parts = /^([+-]=)?([\d+-.]+)(.*)$/.exec(val),
start = e.cur(true) || 0;
if ( parts ) {
var end = parseFloat(parts[2]),
unit = parts[3] || "px";
// We need to compute starting value
if ( unit != "px" ) {
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self.style[ name ] = (end || 1) + unit;
start = ((end || 1) / e.cur(true)) * start;
self.style[ name ] = start + unit;
}
// If a +=/-= token was provided, we're doing a relative animation
if ( parts[1] ) {
end = ((parts[1] == "-=" ? -1 : 1) * end) + start;
}
e.custom( start, end, unit );
} else {
e.custom( start, val, "" );
}
}
});
if ( jQuery.isEmptyObject( prop ) ) {
return optall.complete.call(this);
}
// For JS strict compliance
return true;
});
},
stop: function(clearQueue, gotoEnd){
var timers = jQuery.timers;
if (clearQueue) {
this.queue([]);
}
this.each(function(){
// go in reverse order so anything added to the queue during the loop is ignored
for ( var i = timers.length - 1; i >= 0; i-- ) {
if ( timers[i].elem == this ) {
if (gotoEnd) {
// force the next step to be the last
timers[i](true);
}
timers.splice(i, 1);
}
}
});
// start the next in the queue if the last step wasn't forced
if (!gotoEnd) {
this.dequeue();
}
return this;
}
});
// Generate shortcuts for custom animations
jQuery.each({
slideDown: genFx("show", 1),
slideUp: genFx("hide", 1),
slideToggle: genFx("toggle", 1),
fadeIn: { opacity: "show" },
fadeOut: { opacity: "hide" }
}, function( name, props ){
jQuery.fn[ name ] = function( speed, callback ){
return this.animate( props, speed, callback );
};
});
jQuery.extend({
speed: function(speed, easing, fn) {
var opt = speed && typeof speed === "object" ? speed : {
complete: fn || !fn && easing ||
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jQuery.isFunction( speed ) && speed,
duration: speed,
easing: fn && easing || easing && !jQuery.isFunction(easing) && easing
};
opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ? opt.duration :
jQuery.fx.speeds[opt.duration] || jQuery.fx.speeds._default;
// Queueing
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opt.old = opt.complete;
opt.complete = function(){
if ( opt.queue !== false ) {
jQuery(this).dequeue();
}
if ( jQuery.isFunction( opt.old ) ) {
opt.old.call( this );
}
};
return opt;
},
easing: {
linear: function( p, n, firstNum, diff ) {
return firstNum + diff * p;
},
swing: function( p, n, firstNum, diff ) {
return ((-Math.cos(p*Math.PI)/2) + 0.5) * diff + firstNum;
}
},
timers: [],
fx: function( elem, options, prop ){
this.options = options;
this.elem = elem;
this.prop = prop;
if ( !options.orig ) {
options.orig = {};
}
}
});
jQuery.fx.prototype = {
// Simple function for setting a style value
update: function(){
if ( this.options.step ) {
this.options.step.call( this.elem, this.now, this );
}
(jQuery.fx.step[this.prop] || jQuery.fx.step._default)( this );
// Set display property to block for height/width animations
if ( ( this.prop == "height" || this.prop == "width" ) && this.elem.style ) {
this.elem.style.display = "block";
}
},
// Get the current size
cur: function(force){
if ( this.elem[this.prop] != null && (!this.elem.style || this.elem.style[this.prop] == null) ) {
return this.elem[ this.prop ];
}
var r = parseFloat(jQuery.css(this.elem, this.prop, force));
return r && r > -10000 ? r : parseFloat(jQuery.curCSS(this.elem, this.prop)) || 0;
},
// Start an animation from one number to another
custom: function(from, to, unit){
this.startTime = now();
this.start = from;
this.end = to;
this.unit = unit || this.unit || "px";
this.now = this.start;
this.pos = this.state = 0;
var self = this;
function t(gotoEnd){
return self.step(gotoEnd);
}
t.elem = this.elem;
if ( t() && jQuery.timers.push(t) && !timerId ) {
timerId = setInterval(jQuery.fx.tick, 13);
}
},
// Simple 'show' function
show: function(){
// Remember where we started, so that we can go back to it later
this.options.orig[this.prop] = jQuery.style( this.elem, this.prop );
this.options.show = true;
// Begin the animation
// Make sure that we start at a small width/height to avoid any
// flash of content
this.custom(this.prop == "width" || this.prop == "height" ? 1 : 0, this.cur());
// Start by showing the element
jQuery(this.elem).show();
},
// Simple 'hide' function
hide: function(){
// Remember where we started, so that we can go back to it later
this.options.orig[this.prop] = jQuery.style( this.elem, this.prop );
this.options.hide = true;
// Begin the animation
this.custom(this.cur(), 0);
},
// Each step of an animation
step: function(gotoEnd){
var t = now();
if ( gotoEnd || t >= this.options.duration + this.startTime ) {
this.now = this.end;
this.pos = this.state = 1;
this.update();
this.options.curAnim[ this.prop ] = true;
var done = true;
for ( var i in this.options.curAnim ) {
if ( this.options.curAnim[i] !== true ) {
done = false;
}
}
if ( done ) {
if ( this.options.display != null ) {
// Reset the overflow
this.elem.style.overflow = this.options.overflow;
// Reset the display
var old = jQuery.data(this.elem, "olddisplay");
this.elem.style.display = old ? old : this.options.display;
if ( jQuery.css(this.elem, "display") == "none" ) {
this.elem.style.display = "block";
}
}
// Hide the element if the "hide" operation was done
if ( this.options.hide ) {
jQuery(this.elem).hide();
}
// Reset the properties, if the item has been hidden or shown
if ( this.options.hide || this.options.show ){
for ( var p in this.options.curAnim ) {
jQuery.style(this.elem, p, this.options.orig[p]);
}
}
// Execute the complete function
this.options.complete.call( this.elem );
}
return false;
} else {
var n = t - this.startTime;
this.state = n / this.options.duration;
// Perform the easing function, defaults to swing
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var specialEasing = this.options.specialEasing && this.options.specialEasing[this.prop];
var defaultEasing = this.options.easing || (jQuery.easing.swing ? "swing" : "linear");
this.pos = jQuery.easing[specialEasing || defaultEasing](this.state, n, 0, 1, this.options.duration);
this.now = this.start + ((this.end - this.start) * this.pos);
// Perform the next step of the animation
this.update();
}
return true;
}
};
jQuery.extend( jQuery.fx, {
tick:function(){
var timers = jQuery.timers;
for ( var i = 0; i < timers.length; i++ ) {
if ( !timers[i]() ) {
timers.splice(i--, 1);
}
}
if ( !timers.length ) {
jQuery.fx.stop();
}
},
stop:function(){
clearInterval( timerId );
timerId = null;
},
speeds:{
slow: 600,
fast: 200,
// Default speed
_default: 400
},
step: {
opacity: function(fx){
jQuery.style(fx.elem, "opacity", fx.now);
},
_default: function(fx){
if ( fx.elem.style && fx.elem.style[ fx.prop ] != null ) {
fx.elem.style[ fx.prop ] = (fx.prop === "width" || fx.prop === "height" ? Math.max(0, fx.now) : fx.now) + fx.unit;
} else {
fx.elem[ fx.prop ] = fx.now;
}
}
}
});
if ( jQuery.expr && jQuery.expr.filters ) {
jQuery.expr.filters.animated = function(elem){
return jQuery.grep(jQuery.timers, function(fn){
return elem === fn.elem;
}).length;
};
}