trotzig/diffux

define([
    "./core"
], function( jQuery ) {

/*
 * Optional (non-Sizzle) selector module for custom builds.
 *
 * Note that this DOES NOT SUPPORT many documented jQuery
 * features in exchange for its smaller size:
 *
 * Attribute not equal selector
 * Positional selectors (:first; :eq(n); :odd; etc.)
 * Type selectors (:input; :checkbox; :button; etc.)
 * State-based selectors (:animated; :visible; :hidden; etc.)
 * :has(selector)
 * :not(complex selector)
 * custom selectors via Sizzle extensions
 * Leading combinators (e.g., $collection.find("> *"))
 * Reliable functionality on XML fragments
 * Requiring all parts of a selector to match elements under context
 *   (e.g., $div.find("div > *") now matches children of $div)
 * Matching against non-elements
 * Reliable sorting of disconnected nodes
 * querySelectorAll bug fixes (e.g., unreliable :focus on WebKit)
 *
 * If any of these are unacceptable tradeoffs, either use Sizzle or
 * customize this stub for the project's specific needs.
 */

var docElem = window.document.documentElement,
    selector_hasDuplicate,
    matches = docElem.matches ||
        docElem.webkitMatchesSelector ||
        docElem.mozMatchesSelector ||
        docElem.oMatchesSelector ||
        docElem.msMatchesSelector,
    selector_sortOrder = function( a, b ) {
        // Flag for duplicate removal
        if ( a === b ) {
            selector_hasDuplicate = true;
            return 0;
        }

        var compare = b.compareDocumentPosition && a.compareDocumentPosition && a.compareDocumentPosition( b );

        if ( compare ) {
            // Disconnected nodes
            if ( compare & 1 ) {

                // Choose the first element that is related to our document
                if ( a === document || jQuery.contains(document, a) ) {
                    return -1;
                }
                if ( b === document || jQuery.contains(document, b) ) {
                    return 1;
                }

                // Maintain original order
                return 0;
            }

            return compare & 4 ? -1 : 1;
        }

        // Not directly comparable, sort on existence of method
        return a.compareDocumentPosition ? -1 : 1;
    };

jQuery.extend({
    find: function( selector, context, results, seed ) {
        var elem, nodeType,
            i = 0;

        results = results || [];
        context = context || document;

        // Same basic safeguard as Sizzle
        if ( !selector || typeof selector !== "string" ) {
            return results;
        }

        // Early return if context is not an element or document
        if ( (nodeType = context.nodeType) !== 1 && nodeType !== 9 ) {
            return [];
        }

        if ( seed ) {
            while ( (elem = seed[i++]) ) {
                if ( jQuery.find.matchesSelector(elem, selector) ) {
                    results.push( elem );
                }
            }
        } else {
            jQuery.merge( results, context.querySelectorAll(selector) );
        }

        return results;
    },
    unique: function( results ) {
        var elem,
            duplicates = [],
            i = 0,
            j = 0;

        selector_hasDuplicate = false;
        results.sort( selector_sortOrder );

        if ( selector_hasDuplicate ) {
            while ( (elem = results[i++]) ) {
                if ( elem === results[ i ] ) {
                    j = duplicates.push( i );
                }
            }
            while ( j-- ) {
                results.splice( duplicates[ j ], 1 );
            }
        }

        return results;
    },
    text: function( elem ) {
        var node,
            ret = "",
            i = 0,
            nodeType = elem.nodeType;

        if ( !nodeType ) {
            // If no nodeType, this is expected to be an array
            while ( (node = elem[i++]) ) {
                // Do not traverse comment nodes
                ret += jQuery.text( node );
            }
        } else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
            // Use textContent for elements
            return elem.textContent;
        } else if ( nodeType === 3 || nodeType === 4 ) {
            return elem.nodeValue;
        }
        // Do not include comment or processing instruction nodes

        return ret;
    },
    contains: function( a, b ) {
        var adown = a.nodeType === 9 ? a.documentElement : a,
            bup = b && b.parentNode;
        return a === bup || !!( bup && bup.nodeType === 1 && adown.contains(bup) );
    },
    isXMLDoc: function( elem ) {
        return (elem.ownerDocument || elem).documentElement.nodeName !== "HTML";
    },
    expr: {
        attrHandle: {},
        match: {
            bool: /^(?:checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped)$/i,
            needsContext: /^[\x20\t\r\n\f]*[>+~]/
        }
    }
});

jQuery.extend( jQuery.find, {
    matches: function( expr, elements ) {
        return jQuery.find( expr, null, null, elements );
    },
    matchesSelector: function( elem, expr ) {
        return matches.call( elem, expr );
    },
    attr: function( elem, name ) {
        return elem.getAttribute( name );
    }
});

});