ddd-jquery/data/Data.js

de-bowerified, de-amdified, de-gruntified... jQuery.

var jQuery = require('../core'), rnotwhite = require('../var/rnotwhite'), __unnameddep__ = require('./accepts');
function Data() {
    Object.defineProperty(this.cache = {}, 0, {
        get: function () {
            return {};
        }
    });
    this.expando = jQuery.expando + Math.random();
}
Data.uid = 1;
Data.accepts = jQuery.acceptData;
Data.prototype = {
    key: function (owner) {
        if (!Data.accepts(owner)) {
            return 0;
        }
        var descriptor = {}, unlock = owner[this.expando];
        if (!unlock) {
            unlock = Data.uid++;
            try {
                descriptor[this.expando] = { value: unlock };
                Object.defineProperties(owner, descriptor);
            } catch (e) {
                descriptor[this.expando] = unlock;
                jQuery.extend(owner, descriptor);
            }
        }
        if (!this.cache[unlock]) {
            this.cache[unlock] = {};
        }
        return unlock;
    },
    set: function (owner, data, value) {
        var prop, unlock = this.key(owner), cache = this.cache[unlock];
        if (typeof data === 'string') {
            cache[data] = value;
        } else {
            if (jQuery.isEmptyObject(cache)) {
                jQuery.extend(this.cache[unlock], data);
            } else {
                for (prop in data) {
                    cache[prop] = data[prop];
                }
            }
        }
        return cache;
    },
    get: function (owner, key) {
        var cache = this.cache[this.key(owner)];
        return key === undefined ? cache : cache[key];
    },
    access: function (owner, key, value) {
        var stored;
        if (key === undefined || key && typeof key === 'string' && value === undefined) {
            stored = this.get(owner, key);
            return stored !== undefined ? stored : this.get(owner, jQuery.camelCase(key));
        }
        this.set(owner, key, value);
        return value !== undefined ? value : key;
    },
    remove: function (owner, key) {
        var i, name, camel, unlock = this.key(owner), cache = this.cache[unlock];
        if (key === undefined) {
            this.cache[unlock] = {};
        } else {
            if (jQuery.isArray(key)) {
                name = key.concat(key.map(jQuery.camelCase));
            } else {
                camel = jQuery.camelCase(key);
                if (key in cache) {
                    name = [
                        key,
                        camel
                    ];
                } else {
                    name = camel;
                    name = name in cache ? [name] : name.match(rnotwhite) || [];
                }
            }
            i = name.length;
            while (i--) {
                delete cache[name[i]];
            }
        }
    },
    hasData: function (owner) {
        return !jQuery.isEmptyObject(this.cache[owner[this.expando]] || {});
    },
    discard: function (owner) {
        if (owner[this.expando]) {
            delete this.cache[owner[this.expando]];
        }
    }
};
module.exports = Data;