jquery.effects.scale.js

/*
 * jQuery UI Effects Scale @VERSION
 *
 * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT or GPL Version 2 licenses.
 * http://jquery.org/license
 *
 * http://docs.jquery.com/UI/Effects/Scale
 *
 * Depends:
 *	jquery.effects.core.js
 */
(function( $, undefined ) {

$.effects.effect.puff = function( o, done ) {
	var elem = $( this ),
		mode = $.effects.setMode( elem, o.mode || "hide" ),
		hide = mode === "hide",
		percent = parseInt( o.percent, 10 ) || 150,
		factor = percent / 100,
		original = { 
			height: elem.height(), 
			width: elem.width() 
		};

	$.extend( o, {
		effect: "scale",
		queue: false,
		fade: true,
		mode: mode,
		complete: done,
		percent: hide ? percent : 100,
		from: hide
			? original
			: {
				height: original.height * factor,
				width: original.width * factor
			}
	});

	elem.effect( o );
};

$.effects.effect.scale = function( o, done ) {

	// Create element
	var el = $( this ),
		options = $.extend( true, {}, o ),
		mode = $.effects.setMode( el, o.mode || "effect" ),
		percent = parseInt( o.percent, 10 ) || ( parseInt( o.percent, 10 ) == 0 ? 0 : ( mode == "hide" ? 0 : 100 ) ),
		direction = o.direction || "both",
		origin = o.origin,
		original = { 
			height: el.height(), 
			width: el.width(),
			outerHeight: el.outerHeight(),
			outerWidth: el.outerWidth()
		},
		factor = {
			y: direction != "horizontal" ? (percent / 100) : 1,
			x: direction != "vertical" ? (percent / 100) : 1
		}; 

	// We are going to pass this effect to the size effect:
	options.effect = "size";
	options.queue = false;
	options.complete = done;

	// Set default origin and restore for show/hide
	if ( mode != "effect" ) { 
		options.origin = origin || ["middle","center"];
		options.restore = true;
	}

	options.from = o.from || ( mode == "show" ? { height: 0, width: 0 } : original ); 
	options.to = {
		height: original.height * factor.y, 
		width: original.width * factor.x,
		outerHeight: original.outerHeight * factor.y, 
		outerWidth: original.outerWidth * factor.x
	}; 

	if ( options.fade ) { // Fade option to support puff
		if ( mode == "show" ) {
			options.from.opacity = 0; 
			options.to.opacity = 1;
		}
		if ( mode == "hide" ) {
			options.from.opacity = 1; 
			options.to.opacity = 0;
		}
	};

	// Animate
	el.effect( options );

};

$.effects.effect.size = function( o, done ) {

	// Create element
	var el = $( this ), 
		props = [ "position", "top", "bottom", "left", "right", "width", "height", "overflow", "opacity" ],

		// Always restore
		props1 = [ "position", "top", "bottom", "left", "right", "overflow", "opacity" ],

		// Copy for children
		props2 = [ "width", "height", "overflow" ],
		cProps = [ "fontSize" ],
		vProps = [ "borderTopWidth", "borderBottomWidth", "paddingTop", "paddingBottom" ],
		hProps = [ "borderLeftWidth", "borderRightWidth", "paddingLeft", "paddingRight" ],

		// Set options
		mode = $.effects.setMode( el, o.mode || "effect" ),
		restore = o.restore || mode !== "effect",
		scale = o.scale || "both",
		origin = o.origin || [ "middle", "center" ],
		original, baseline, factor,
		position = el.css( "position" );

	if ( mode === "show" ) {
		el.show();
	}
	original = {
		height: el.height(), 
		width: el.width(),
		outerHeight: el.outerHeight(),
		outerWidth: el.outerWidth()
	};

	el.from = o.from || original;
	el.to = o.to || original;

	// Set scaling factor
	factor = {
		from: {
			y: el.from.height / original.height, 
			x: el.from.width / original.width
		},
		to: {
			y: el.to.height / original.height, 
			x: el.to.width / original.width
		}
	};

	// Scale the css box
	if ( scale == "box" || scale == "both" ) {

		// Vertical props scaling
		if ( factor.from.y !== factor.to.y ) { 
			props = props.concat( vProps );
			el.from = $.effects.setTransition( el, vProps, factor.from.y, el.from );
			el.to = $.effects.setTransition( el, vProps, factor.to.y, el.to );
		};

		// Horizontal props scaling
		if ( factor.from.x !== factor.to.x ) { 
			props = props.concat( hProps );
			el.from = $.effects.setTransition( el, hProps, factor.from.x, el.from );
			el.to = $.effects.setTransition( el, hProps, factor.to.x, el.to );
		};
	};

	// Scale the content
	if ( scale == "content" || scale == "both" ) { 

		// Vertical props scaling
		if ( factor.from.y !== factor.to.y ) { 
			props = props.concat( cProps );
			el.from = $.effects.setTransition( el, cProps, factor.from.y, el.from );
			el.to = $.effects.setTransition( el, cProps, factor.to.y, el.to );
		};
	};
	
	$.effects.save( el, restore ? props : props1 ); 
	el.show(); 
	$.effects.createWrapper( el );
	el.css( "overflow", "hidden" ).css( el.from ); 

	// Adjust
	if (origin) { // Calculate baseline shifts
		baseline = $.effects.getBaseline( origin, original );
		el.from.top = ( original.outerHeight - el.outerHeight() ) * baseline.y;
		el.from.left = ( original.outerWidth - el.outerWidth() ) * baseline.x;
		el.to.top = ( original.outerHeight - el.to.outerHeight ) * baseline.y;
		el.to.left = ( original.outerWidth - el.to.outerWidth ) * baseline.x;
	}
	el.css( el.from ); // set top & left

	// Animate
	if ( scale == "content" || scale == "both" ) { // Scale the children

		// Add margins/font-size
		vProps = vProps.concat([ "marginTop", "marginBottom" ]).concat(cProps);
		hProps = hProps.concat([ "marginLeft", "marginRight" ]);
		props2 = props.concat(vProps).concat(hProps);

		el.find( "*[width]" ).each( function(){
			var child = $( this ),
				c_original = { 
					height: child.height(), 
					width: child.width()
				};
			if (restore) $.effects.save(child, props2);
			
			child.from = {
				height: c_original.height * factor.from.y, 
				width: c_original.width * factor.from.x
			};
			child.to = {
				height: c_original.height * factor.to.y, 
				width: c_original.width * factor.to.x
			};

			// Vertical props scaling
			if ( factor.from.y != factor.to.y ) { 
				child.from = $.effects.setTransition( child, vProps, factor.from.y, child.from );
				child.to = $.effects.setTransition( child, vProps, factor.to.y, child.to );
			};

			// Horizontal props scaling
			if ( factor.from.x != factor.to.x ) {
				child.from = $.effects.setTransition( child, hProps, factor.from.x, child.from );
				child.to = $.effects.setTransition( child, hProps, factor.to.x, child.to );
			};

			// Animate children
			child.css( child.from );
			child.animate( child.to, o.duration, o.easing, function() {

				// Restore children
				if (restore) $.effects.restore( child, props2 ); 
			});
		});
	};

	// Animate
	el.animate( el.to, { 
		queue: false, 
		duration: o.duration, 
		easing: o.easing, 
		complete: function() {
			if ( el.to.opacity === 0 ) {
				el.css( "opacity", el.from.opacity );
			}
			if( mode == "hide" ) {
				el.hide();
			}
			$.effects.restore( el, restore ? props : props1 );
			if ( !restore ) {

				// we need to calculate our new positioning based on the scaling
				if ( position === "static" ) {
					el.css({
						position: "relative",
						top: el.to.top,
						left: el.to.left
					});
				} else {
					$.each([ "top", "left" ], function( idx, pos ) {
						el.css( pos, function( _, str ) {
							var val = parseInt( str, 10 ),
								toRef = idx ? el.to.left : el.to.top,
								delta = idx ? el.to.outerWidth - el.from.outerWidth: el.to.outerHeight - el.from.outerHeight,
								same = origin[ idx ] === pos,
								mid = origin[ idx ] === "middle" || origin[ idx ] === "center";

							// if original was "auto", recalculate the new value from wrapper
							if ( str === "auto" ) {
								return toRef + "px";
							}

							return val + toRef + "px"; 
						});
					});
				}
			}

			$.effects.removeWrapper( el );
			done();
		}
	});

};

})(jQuery);