jquery-mobile/js/jquery.mobile.buttonMarkup.js

/*
* jQuery Mobile Framework : "buttons" plugin - for making button-like links
* Copyright (c) jQuery Project
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*/
( function( $, undefined ) {

$.fn.buttonMarkup = function( options ) {
	options = options || {};

	for ( var i = 0; i < this.length; i++ ) {
		var el = this.eq( i ),
			e = el[ 0 ],
			o = $.extend( {}, $.fn.buttonMarkup.defaults, {
				icon:       options.icon       || el.jqmData( "icon" ),
				iconpos:    options.iconpos    || el.jqmData( "iconpos" ),
				theme:      options.theme      || el.jqmData( "theme" ),
				inline:     options.inline     || el.jqmData( "inline" ),
				shadow:     options.shadow     || el.jqmData( "shadow" ),
				corners:    options.corners    || el.jqmData( "corners" ),
				iconshadow: options.iconshadow || el.jqmData( "iconshadow" )
			}, options ),

			// Classes Defined
			innerClass = "ui-btn-inner",
			textClass = "ui-btn-text",
			buttonClass, iconClass,

			// Button inner markup
			buttonInner = document.createElement( o.wrapperEls ),
			buttonText = document.createElement( o.wrapperEls ),
			buttonIcon = o.icon ? document.createElement( "span" ) : null;

		if ( attachEvents ) {
			attachEvents();
		}

		// if not, try to find closest theme container
		if ( !o.theme ) {
			o.theme = $.mobile.getInheritedTheme( el, "c" );
		}

		buttonClass = "ui-btn ui-btn-up-" + o.theme;

		if ( o.inline ) {
			buttonClass += " ui-btn-inline";
		}

		if ( o.icon ) {
			o.icon = "ui-icon-" + o.icon;
			o.iconpos = o.iconpos || "left";

			iconClass = "ui-icon " + o.icon;

			if ( o.iconshadow ) {
				iconClass += " ui-icon-shadow";
			}
		}

		if ( o.iconpos ) {
			buttonClass += " ui-btn-icon-" + o.iconpos;

			if ( o.iconpos == "notext" && !el.attr( "title" ) ) {
				el.attr( "title", el.getEncodedText() );
			}
		}

		if ( o.corners ) {
			buttonClass += " ui-btn-corner-all";
			innerClass += " ui-btn-corner-all";
		}

		if ( o.shadow ) {
			buttonClass += " ui-shadow";
		}

		el.attr( "data-" + $.mobile.ns + "theme", o.theme )
			.addClass( buttonClass );

		buttonInner.className = innerClass;
		buttonInner.setAttribute("aria-hidden", "true");

		buttonText.className = textClass;
		buttonInner.appendChild( buttonText );

		if ( buttonIcon ) {
			buttonIcon.className = iconClass;
			buttonInner.appendChild( buttonIcon );
		}

		while ( e.firstChild ) {
			buttonText.appendChild( e.firstChild );
		}

		e.appendChild( buttonInner );
		
		// TODO obviously it would be nice to pull this element out instead of
		// retrieving it from the DOM again, but this change is much less obtrusive
		// and 1.0 draws nigh
		el.data( 'textWrapper', $( buttonText ) );
	}

	return this;
};

$.fn.buttonMarkup.defaults = {
	corners: true,
	shadow: true,
	iconshadow: true,
	inline: false,
	wrapperEls: "span"
};

function closestEnabledButton( element ) {
    var cname;

    while ( element ) {
        cname = element.className && element.className.split(' ');
        if ( cname && $.inArray( "ui-btn", cname ) > -1 && $.inArray( "ui-disabled", cname ) < 0 ) {
            break;
        }
        element = element.parentNode;
    }

    return element;
}

var attachEvents = function() {
	$( document ).bind( {
		"vmousedown": function( event ) {
			var btn = closestEnabledButton( event.target ),
				$btn, theme;

			if ( btn ) {
				$btn = $( btn );
				theme = $btn.attr( "data-" + $.mobile.ns + "theme" );
				$btn.removeClass( "ui-btn-up-" + theme ).addClass( "ui-btn-down-" + theme );
			}
		},
		"vmousecancel vmouseup": function( event ) {
			var btn = closestEnabledButton( event.target ),
				$btn, theme;

			if ( btn ) {
				$btn = $( btn );
				theme = $btn.attr( "data-" + $.mobile.ns + "theme" );
				$btn.removeClass( "ui-btn-down-" + theme ).addClass( "ui-btn-up-" + theme );
			}
		},
		"vmouseover focus": function( event ) {
			var btn = closestEnabledButton( event.target ),
				$btn, theme;

			if ( btn ) {
				$btn = $( btn );
				theme = $btn.attr( "data-" + $.mobile.ns + "theme" );
				$btn.removeClass( "ui-btn-up-" + theme ).addClass( "ui-btn-hover-" + theme );
			}
		},
		"vmouseout blur": function( event ) {
			var btn = closestEnabledButton( event.target ),
				$btn, theme;

			if ( btn ) {
				$btn = $( btn );
				theme = $btn.attr( "data-" + $.mobile.ns + "theme" );
				$btn.removeClass( "ui-btn-hover-" + theme ).addClass( "ui-btn-up-" + theme );
			}
		}
	});

	attachEvents = null;
};

//links in bars, or those with  data-role become buttons
//auto self-init widgets
$( document ).bind( "pagecreate create", function( e ){

	$( ":jqmData(role='button'), .ui-bar > a, .ui-header > a, .ui-footer > a, .ui-bar > :jqmData(role='controlgroup') > a", e.target )
		.not( ".ui-btn, :jqmData(role='none'), :jqmData(role='nojs')" )
		.buttonMarkup();
});

})( jQuery );