Accordion: Attempt at improving animation.

ui/jquery.ui.accordion.js

@@ -17,6 +17,7 @@ $.widget( "ui.accordion", {
 	version: "@VERSION",
 	options: {
 		active: 0,
+		// TODO: animation option
 		animated: "slide",
 		collapsible: false,
 		event: "click",
@@ -35,7 +36,7 @@ $.widget( "ui.accordion", {
 	_create: function() {
 		var options = this.options;
 
-		this.lastToggle = {};
+		this.prevShow = this.prevHide = $();
 		this.element.addClass( "ui-accordion ui-widget ui-helper-reset" );
 
 		this.headers = this.element.find( options.header )
@@ -62,6 +63,7 @@ $.widget( "ui.accordion", {
 		this.active.next().addClass( "ui-accordion-content-active" );
 
 		this._createIcons();
+		this.originalHeight = this.element[0].style.height;
 		this.refresh();
 
 		// ARIA
@@ -156,6 +158,7 @@ $.widget( "ui.accordion", {
 			.removeAttr( "role" )
 			.removeClass( "ui-helper-reset ui-widget-content ui-corner-bottom ui-accordion-content ui-accordion-content-active ui-accordion-disabled ui-state-disabled" );
 		if ( this.options.heightStyle !== "content" ) {
+			this.element.css( "height", this.originalHeight );
 			contents.css( "height", "" );
 		}
 	},
@@ -229,12 +232,12 @@ $.widget( "ui.accordion", {
 	},
 
 	refresh: function() {
-		var options = this.options,
+		var heightStyle = this.options.heightStyle,
 			parent = this.element.parent(),
 			maxHeight,
 			overflow;
 
-		if ( options.heightStyle === "fill" ) {
+		if ( heightStyle === "fill" ) {
 			// IE 6 treats height like minHeight, so we need to turn off overflow
 			// in order to get a reliable height
 			// we use the minHeight support test because we assume that only
@@ -267,7 +270,7 @@ $.widget( "ui.accordion", {
 						$( this ).innerHeight() + $( this ).height() ) );
 				})
 				.css( "overflow", "auto" );
-		} else if ( options.heightStyle === "auto" ) {
+		} else if ( heightStyle === "auto" ) {
 			maxHeight = 0;
 			this.headers.next()
 				.each(function() {
@@ -276,7 +279,9 @@ $.widget( "ui.accordion", {
 				.height( maxHeight );
 		}
 
-		return this;
+		if ( heightStyle !== "content" ) {
+			this.element.height( this.element.height() );
+		}
 	},
 
 	_activate: function( index ) {
@@ -361,41 +366,22 @@ $.widget( "ui.accordion", {
 	},
 
 	_toggle: function( data ) {
-		var that = this,
-			options = this.options,
-			toShow = data.newContent,
-			toHide = data.oldContent;
-
-		function complete() {
-			that._completed( data );
-		}
+		var toShow = data.newContent,
+			toHide = this.prevShow.length ? this.prevShow : data.oldContent;
 
-		if ( options.animated ) {
-			var animations = $.ui.accordion.animations,
-				animation = options.animated,
-				additional;
-
-			if ( !animations[ animation ] ) {
-				additional = {
-					easing: $.easing[ animation ] ? animation : "slide",
-					duration: 700
-				};
-				animation = "slide";
-			}
+		// handle activating a panel during the animation for another activation
+		this.prevShow.add( this.prevHide ).stop( true, true );
+		this.prevShow = toShow;
+		this.prevHide = toHide;
 
-			animations[ animation ]({
-				widget: this,
-				toShow: toShow,
-				toHide: toHide,
-				prevShow: this.lastToggle.toShow,
-				prevHide: this.lastToggle.toHide,
-				complete: complete,
-				down: toShow.length && ( !toHide.length || ( toShow.index() < toHide.index() ) )
-			}, additional );
+		if ( this.options.animated ) {
+			// TODO: back compat for animated option
+			// TODO: back compat for bounceslide
+			this._animate( toShow, toHide, data );
 		} else {
 			toHide.hide();
 			toShow.show();
-			complete();
+			this._completed( data );
 		}
 
 		// TODO assert that the blur and focus triggers are really necessary, remove otherwise
@@ -415,17 +401,51 @@ $.widget( "ui.accordion", {
 			.focus();
 	},
 
+	_animate: function( toShow, toHide, data ) {
+		var total, easing, duration,
+			that = this,
+			down = toShow.length &&
+				( !toHide.length || ( toShow.index() < toHide.index() ) ),
+			animation = this.options.animation || {},
+			options = down && animation.down || animation,
+			complete = function() {
+				toShow.removeData( "accordionHeight" );
+				that._completed( data );
+			};
+
+		if ( typeof options === "number" ) {
+			duration = options;
+		}
+		if ( typeof options === "string" ) {
+			easing = options;
+		}
+		// fall back from options to animation in case of partial down settings
+		easing = easing || options.easing || animation.easing;
+		duration = duration || options.duration || animation.duration;
+
+		if ( !toHide.size() ) {
+			return toShow.animate( showProps, duration, easing, complete );
+		}
+		if ( !toShow.size() ) {
+			return toHide.animate( hideProps, duration, easing, complete );
+		}
+
+		total = toShow.show().outerHeight();
+		toHide.animate( hideProps, duration, easing );
+		toShow
+			.hide()
+			.data( "accordionHeight", {
+				total: total,
+				toHide: toHide
+			})
+			.animate( this.options.heightStyle === "content" ? showProps : showPropsAdjust,
+				duration, easing, complete );
+	},
+
 	_completed: function( data ) {
 		var toShow = data.newContent,
 			toHide = data.oldContent;
 
-		if ( this.options.heightStyle === "content" ) {
-			toShow.add( toHide ).css({
-				height: "",
-				overflow: ""
-			});
-		}
-
 		// other classes are removed before the animation; this one needs to stay until completed
 		toHide.removeClass( "ui-accordion-content-active" );
 		// Work around for rendering bug in IE (#5421)
@@ -437,123 +457,19 @@ $.widget( "ui.accordion", {
 	}
 });
 
-$.extend( $.ui.accordion, {
-	animations: {
-		slide: function( options, additions ) {
-			if ( options.prevShow || options.prevHide ) {
-				options.prevHide.stop( true, true );
-				options.toHide = options.prevShow;
-			}
-
-			var showOverflow = options.toShow.css( "overflow" ),
-				showOverflowX = options.toHide.css( "overflowX" ),
-				showOverflowY = options.toHide.css( "overflowY" ),
-				hideOverflow = options.toHide.css( "overflow" ),
-				hideOverflowX = options.toHide.css( "overflowX" ),
-				hideOverflowY = options.toHide.css( "overflowY" ),
-				percentDone = 0,
-				showProps = {},
-				hideProps = {},
-				fxAttrs = [ "height", "paddingTop", "paddingBottom" ],
-				originalWidth;
-			options = $.extend({
-				easing: "swing",
-				duration: 300
-			}, options, additions );
-
-			options.widget.lastToggle = options;
-
-			if ( !options.toHide.size() ) {
-				originalWidth = options.toShow[0].style.width;
-				options.toShow
-					.show()
-					.width( options.toShow.width() )
-					.hide()
-					.animate({
-						height: "show",
-						paddingTop: "show",
-						paddingBottom: "show"
-					}, {
-						duration: options.duration,
-						easing: options.easing,
-						complete: function() {
-							options.toShow.width( originalWidth );
-							options.complete();
-						}
-					});
-				return;
-			}
-			if ( !options.toShow.size() ) {
-				options.toHide.animate({
-					height: "hide",
-					paddingTop: "hide",
-					paddingBottom: "hide"
-				}, options );
-				return;
-			}
-			// fix width before calculating height of hidden element
-			var s = options.toShow;
-			originalWidth = s[0].style.width;
-			s.width( s.parent().width()
-				- parseFloat( s.css( "paddingLeft" ) )
-				- parseFloat( s.css( "paddingRight" ) )
-				- ( parseFloat( s.css( "borderLeftWidth" ) ) || 0 )
-				- ( parseFloat( s.css( "borderRightWidth" ) ) || 0 ) );
-
-			$.each( fxAttrs, function( i, prop ) {
-				hideProps[ prop ] = "hide";
-
-				var parts = ( "" + $.css( options.toShow[0], prop ) ).match( /^([\d+-.]+)(.*)$/ ),
-					// work around bug when a panel has no height - #7335
-					propVal = prop === "height" && parts[ 1 ] === "0" ? 1 : parts[ 1 ];
-				showProps[ prop ] = {
-					value: propVal,
-					unit: parts[ 2 ] || "px"
-				};
-			});
-			options.toShow.css({ height: 0, overflow: "hidden" }).show();
-			options.toHide
-				.filter( ":hidden" )
-					.each( options.complete )
-				.end()
-				.filter( ":visible" )
-				.animate( hideProps, {
-				step: function( now, settings ) {
-					if ( settings.prop == "height" || settings.prop == "paddingTop" || settings.prop == "paddingBottom" ) {
-						percentDone = ( settings.end - settings.start === 0 ) ? 0 :
-							( settings.now - settings.start ) / ( settings.end - settings.start );
-					}
-
-					options.toShow[ 0 ].style[ settings.prop ] =
-						( percentDone * showProps[ settings.prop ].value )
-						+ showProps[ settings.prop ].unit;
-				},
-				duration: options.duration,
-				easing: options.easing,
-				complete: function() {
-					options.toShow.css({
-						width: originalWidth,
-						overflow: showOverflow,
-						overflowX: showOverflowX,
-						overflowY: showOverflowY
-					});
-					options.toHide.css({
-						overflow: hideOverflow,
-						overflowX: hideOverflowX,
-						overflowY: hideOverflowY
-					});
-					options.complete();
-				}
-			});
-		},
-		bounceslide: function( options ) {
-			this.slide( options, {
-				easing: options.down ? "easeOutBounce" : "swing",
-				duration: options.down ? 1000 : 200
-			});
-		}
-	}
-});
+$.fx.step.accordionHeight = function( fx ) {
+	var elem = $( fx.elem ),
+		data = elem.data( "accordionHeight" );
+	elem.height( data.total - elem.outerHeight() - data.toHide.outerHeight() + elem.height() );
+};
+var hideProps = {},
+	showProps = {},
+	showPropsAdjust = {};
+hideProps.height = hideProps.paddingTop = hideProps.paddingBottom =
+	hideProps.borderTopWidth = hideProps.borderBottomWidth = "hide";
+showProps.height = showProps.paddingTop = showProps.paddingBottom =
+	showProps.borderTopWidth = showProps.borderBottomWidth = "show";
+$.extend( showPropsAdjust, showProps, { accordionHeight: "show" } );