base.js

Ajax下日志框架

/***

MochiKit.Base 1.3.1

See <http://mochikit.com/> for documentation, downloads, license, etc.

(c) 2005 Bob Ippolito.  All rights Reserved.

***/

if (typeof(dojo) != 'undefined') {
    dojo.provide("MochiKit.Base");
}

if (typeof(MochiKit) == 'undefined') {
    MochiKit = {};
}
if (typeof(MochiKit.Base) == 'undefined') {
    MochiKit.Base = {};
}

MochiKit.Base.VERSION = "1.3.1";
MochiKit.Base.NAME = "MochiKit.Base";
MochiKit.Base.update = function (self, obj/*, ... */) {
    if (self === null) {
        self = {};
    }
    for (var i = 1; i < arguments.length; i++) {
        var o = arguments[i];
        if (typeof(o) != 'undefined' && o !== null) {
            for (var k in o) {
                self[k] = o[k];
            }
        }
    }
    return self;
};

MochiKit.Base.update(MochiKit.Base, {
    __repr__: function () {
        return "[" + this.NAME + " " + this.VERSION + "]";
    },

    toString: function () {
        return this.__repr__();
    },

    counter: function (n/* = 1 */) {
        if (arguments.length === 0) {
            n = 1;
        }
        return function () {
            return n++;
        };
    },
        
    clone: function (obj) {
        var me = arguments.callee;
        if (arguments.length == 1) {
            me.prototype = obj;
            return new me();
        }
    },
            
    flattenArguments: function (lst/* ...*/) {
        var res = [];
        var m = MochiKit.Base;
        var args = m.extend(null, arguments);
        while (args.length) {
            var o = args.shift();
            if (o && typeof(o) == "object" && typeof(o.length) == "number") {
                for (var i = o.length - 1; i >= 0; i--) {
                    args.unshift(o[i]);
                }
            } else {
                res.push(o);
            }
        }
        return res;
    },

    extend: function (self, obj, /* optional */skip) {        
        // Extend an array with an array-like object starting
        // from the skip index
        if (!skip) {
            skip = 0;
        }
        if (obj) {
            // allow iterable fall-through, but skip the full isArrayLike
            // check for speed, this is called often.
            var l = obj.length;
            if (typeof(l) != 'number' /* !isArrayLike(obj) */) {
                if (typeof(MochiKit.Iter) != "undefined") {
                    obj = MochiKit.Iter.list(obj);
                    l = obj.length;
                } else {
                    throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
                }
            }
            if (!self) {
                self = [];
            }
            for (var i = skip; i < l; i++) {
                self.push(obj[i]);
            }
        }
        // This mutates, but it's convenient to return because
        // it's often used like a constructor when turning some
        // ghetto array-like to a real array
        return self;
    },


    updatetree: function (self, obj/*, ...*/) {
        if (self === null) {
            self = {};
        }
        for (var i = 1; i < arguments.length; i++) {
            var o = arguments[i];
            if (typeof(o) != 'undefined' && o !== null) {
                for (var k in o) {
                    var v = o[k];
                    if (typeof(self[k]) == 'object' && typeof(v) == 'object') {
                        arguments.callee(self[k], v);
                    } else {
                        self[k] = v;
                    }
                }
            }
        }
        return self;
    },

    setdefault: function (self, obj/*, ...*/) {
        if (self === null) {
            self = {};
        }
        for (var i = 1; i < arguments.length; i++) {
            var o = arguments[i];
            for (var k in o) {
                if (!(k in self)) {
                    self[k] = o[k];
                }
            }
        }
        return self;
    },

    keys: function (obj) {
        var rval = [];
        for (var prop in obj) {
            rval.push(prop);
        }
        return rval;
    },
        
    items: function (obj) {
        var rval = [];
        var e;
        for (var prop in obj) {
            var v;
            try {
                v = obj[prop];
            } catch (e) {
                continue;
            }
            rval.push([prop, v]);
        }
        return rval;
    },


    _newNamedError: function (module, name, func) {
        func.prototype = new MochiKit.Base.NamedError(module.NAME + "." + name);
        module[name] = func;
    },


    operator: {
        // unary logic operators
        truth: function (a) { return !!a; }, 
        lognot: function (a) { return !a; },
        identity: function (a) { return a; },

        // bitwise unary operators
        not: function (a) { return ~a; },
        neg: function (a) { return -a; },

        // binary operators
        add: function (a, b) { return a + b; },
        sub: function (a, b) { return a - b; },
        div: function (a, b) { return a / b; },
        mod: function (a, b) { return a % b; },
        mul: function (a, b) { return a * b; },

        // bitwise binary operators
        and: function (a, b) { return a & b; },
        or: function (a, b) { return a | b; },
        xor: function (a, b) { return a ^ b; },
        lshift: function (a, b) { return a << b; },
        rshift: function (a, b) { return a >> b; },
        zrshift: function (a, b) { return a >>> b; },

        // near-worthless built-in comparators
        eq: function (a, b) { return a == b; },
        ne: function (a, b) { return a != b; },
        gt: function (a, b) { return a > b; },
        ge: function (a, b) { return a >= b; },
        lt: function (a, b) { return a < b; },
        le: function (a, b) { return a <= b; },

        // compare comparators
        ceq: function (a, b) { return MochiKit.Base.compare(a, b) === 0; },
        cne: function (a, b) { return MochiKit.Base.compare(a, b) !== 0; },
        cgt: function (a, b) { return MochiKit.Base.compare(a, b) == 1; },
        cge: function (a, b) { return MochiKit.Base.compare(a, b) != -1; },
        clt: function (a, b) { return MochiKit.Base.compare(a, b) == -1; },
        cle: function (a, b) { return MochiKit.Base.compare(a, b) != 1; },

        // binary logical operators
        logand: function (a, b) { return a && b; },
        logor: function (a, b) { return a || b; },
        contains: function (a, b) { return b in a; }
    },

    forwardCall: function (func) {
        return function () {
            return this[func].apply(this, arguments);
        };
    },

    itemgetter: function (func) {
        return function (arg) {
            return arg[func];
        };
    },

    typeMatcher: function (/* typ */) {
        var types = {};
        for (var i = 0; i < arguments.length; i++) {
            var typ = arguments[i];
            types[typ] = typ;
        }
        return function () { 
            for (var i = 0; i < arguments.length; i++) {
                if (!(typeof(arguments[i]) in types)) {
                    return false;
                }
            }
            return true;
        };
    },

    isNull: function (/* ... */) {
        for (var i = 0; i < arguments.length; i++) {
            if (arguments[i] !== null) {
                return false;
            }
        }
        return true;
    },

    isUndefinedOrNull: function (/* ... */) {
        for (var i = 0; i < arguments.length; i++) {
            var o = arguments[i];
            if (!(typeof(o) == 'undefined' || o === null)) {
                return false;
            }
        }
        return true;
    },

    isEmpty: function (obj) {
        return !MochiKit.Base.isNotEmpty.apply(this, arguments);
    },

    isNotEmpty: function (obj) {
        for (var i = 0; i < arguments.length; i++) {
            var o = arguments[i];
            if (!(o && o.length)) {
                return false;
            }
        }
        return true;
    },

    isArrayLike: function () {
        for (var i = 0; i < arguments.length; i++) {
            var o = arguments[i];
            var typ = typeof(o);
            if (
                (typ != 'object' && !(typ == 'function' && typeof(o.item) == 'function')) ||
                o === null ||
                typeof(o.length) != 'number'
            ) {
                return false;
            }
        }
        return true;
    },

    isDateLike: function () {
        for (var i = 0; i < arguments.length; i++) {
            var o = arguments[i];
            if (typeof(o) != "object" || o === null
                    || typeof(o.getTime) != 'function') {
                return false;
            }
        }
        return true;
    },


    xmap: function (fn/*, obj... */) {
        if (fn === null) {
            return MochiKit.Base.extend(null, arguments, 1);
        }
        var rval = [];
        for (var i = 1; i < arguments.length; i++) {
            rval.push(fn(arguments[i]));
        }
        return rval;
    },

    map: function (fn, lst/*, lst... */) {
        var m = MochiKit.Base;
        var itr = MochiKit.Iter;
        var isArrayLike = m.isArrayLike;
        if (arguments.length <= 2) {
            // allow an iterable to be passed
            if (!isArrayLike(lst)) {
                if (itr) {
                    // fast path for map(null, iterable)
                    lst = itr.list(lst);
                    if (fn === null) {
                        return lst;
                    }
                } else {
                    throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
                }
            }
            // fast path for map(null, lst)
            if (fn === null) {
                return m.extend(null, lst);
            }
            // disabled fast path for map(fn, lst)
            /*
            if (false && typeof(Array.prototype.map) == 'function') {
                // Mozilla fast-path
                return Array.prototype.map.call(lst, fn);
            }
            */
            var rval = [];
            for (var i = 0; i < lst.length; i++) {
                rval.push(fn(lst[i]));
            }
            return rval;
        } else {
            // default for map(null, ...) is zip(...)
            if (fn === null) {
                fn = Array;
            }
            var length = null;
            for (i = 1; i < arguments.length; i++) {
                // allow iterables to be passed
                if (!isArrayLike(arguments[i])) {
                    if (itr) {
                        return itr.list(itr.imap.apply(null, arguments));
                    } else {
                        throw new TypeError("Argument not an array-like and MochiKit.Iter not present");
                    }
                }
                // find the minimum length
                var l = arguments[i].length;
                if (length === null || length > l) {
                    length = l;
                }
            }