FB HistoryManager + jsbeautifier

HistoryManager.js

__d("HistoryManager", ["event-extensions", "function-extensions", "Cookie", "Env", "URI", "UserAgent", "copyProperties", "goOrReplace"], function (a, b, c, d, e, f) {
    b('event-extensions');
    b('function-extensions');
    var g = b('Cookie'),
        h = b('Env'),
        i = b('URI'),
        j = b('UserAgent'),
        k = b('copyProperties'),
        l = b('goOrReplace'),
        m = {
            _IFRAME_BASE_URI: 'http://static.ak.facebook.com/common/history_manager.php',
            history: null,
            current: 0,
            fragment: null,
            _setIframeSrcFragment: function (n) {
                n = n.toString();
                var o = m.history.length - 1;
                m.iframe.src = m._IFRAME_BASE_URI + '?|index=' + o + '#' + encodeURIComponent(n);
                return m;
            },
            getIframeSrcFragment: function () {
                return decodeURIComponent(i(m.iframe.contentWindow.document.location.href).getFragment());
            },
            nextframe: function (n, o) {
                if (o) {
                    m._setIframeSrcFragment(n);
                    return;
                }
                if (n !== undefined) {
                    m.iframeQueue.push(n);
                } else {
                    m.iframeQueue.splice(0, 1);
                    m.iframeTimeout = null;
                    m.checkURI();
                }
                if (m.iframeQueue.length && !m.iframeTimeout) {
                    var p = m.iframeQueue[0];
                    m.iframeTimeout = setTimeout(function () {
                        m._setIframeSrcFragment(p);
                    }, 100, false);
                }
            },
            isInitialized: function () {
                return !!m._initialized;
            },
            init: function () {
                if (!h.ALLOW_TRANSITION_IN_IFRAME && window != window.top) return;
                if (m._initialized) return m;
                var n = i(),
                    o = n.getFragment() || '';
                if (o.charAt(0) === '!') {
                    o = o.substr(1);
                    n.setFragment(o);
                }
                if (i.getRequestURI(false).getProtocol().toLowerCase() == 'https') m._IFRAME_BASE_URI = 'https://s-static.ak.facebook.com/common/history_manager.php';
                k(m, {
                    _initialized: true,
                    fragment: o,
                    orig_fragment: o,
                    history: [n],
                    callbacks: [],
                    lastChanged: Date.now(),
                    canonical: i('#'),
                    fragmentTimeout: null,
                    user: 0,
                    iframeTimeout: null,
                    iframeQueue: [],
                    enabled: true,
                    debug: bagofholding
                });
                if (window.history && history.pushState) {
                    this.lastURI = document.URL;
                    window.history.replaceState(this.lastURI, null);
                    Event.listen(window, 'popstate', function (p) {
                        if (p && p.state && m.lastURI != p.state) {
                            m.lastURI = p.state;
                            m.lastChanged = Date.now();
                            m.notify(i(p.state).getUnqualifiedURI().toString());
                        }
                    }.bind(m));
                    if (j.safari() < 534 || j.chrome() <= 13) {
                        setInterval(m.checkURI, 42, false);
                        m._updateRefererURI(this.lastURI);
                    }
                    return m;
                }
                m._updateRefererURI(i.getRequestURI(false));
                if (j.safari() < 500 || j.firefox() < 2) {
                    m.enabled = false;
                    return m;
                }
                if (j.ie() < 8) {
                    m.iframe = document.createElement('iframe');
                    k(m.iframe.style, {
                        width: '0',
                        height: '0',
                        frameborder: '0',
                        left: '0',
                        top: '0',
                        position: 'absolute'
                    });
                    m._setIframeSrcFragment(o);
                    document.body.insertBefore(m.iframe, document.body.firstChild);
                } else if ('onhashchange' in window) {
                    Event.listen(window, 'hashchange', function () {
                        m.checkURI.bind(m).defer();
                    });
                } else setInterval(m.checkURI, 42, false);
                return m;
            },
            registerURIHandler: function (n) {
                m.callbacks.push(n);
                return m;
            },
            setCanonicalLocation: function (n) {
                m.canonical = i(n);
                return m;
            },
            notify: function (n) {
                if (n == m.orig_fragment) n = m.canonical.getFragment();
                for (var o = 0; o < m.callbacks.length; o++) try {
                    if (m.callbacks[o](n)) return true;
                } catch (p) {}
                return false;
            },
            checkURI: function () {
                if (Date.now() - m.lastChanged < 400) return;
                if (window.history && history.pushState) {
                    var n = i(document.URL).removeQueryData('ref').toString(),
                        o = i(m.lastURI).removeQueryData('ref').toString();
                    if (n != o) {
                        m.lastChanged = Date.now();
                        m.lastURI = n;
                        if (j.safari() < 534) m._updateRefererURI(n);
                        m.notify(i(n).getUnqualifiedURI().toString());
                    }
                    return;
                }
                if (j.ie() < 8 && m.iframeQueue.length) return;
                if (j.safari() && window.history.length == 200) {
                    if (!m.warned) m.warned = true;
                    return;
                }
                var p = i().getFragment();
                if (p.charAt(0) == '!') p = p.substr(1);
                if (j.ie() < 8) p = m.getIframeSrcFragment();
                p = p.replace(/%23/g, '#');
                if (p != m.fragment.replace(/%23/g, '#')) {
                    m.debug([p, ' vs ', m.fragment, 'whl: ', window.history.length, 'QHL: ', m.history.length].join(' '));
                    for (var q = m.history.length - 1; q >= 0; --q) if (m.history[q].getFragment().replace(/%23/g, '#') == p) break;
                    ++m.user;
                    if (q >= 0) {
                        m.go(q - m.current);
                    } else m.go('#' + p);
                    --m.user;
                }
            },
            _updateRefererURI: function (n) {
                n = n.toString();
                if (n.charAt(0) != '/' && n.indexOf('//') == -1) return;
                var o = new i(window.location);
                if (o.isFacebookURI()) {
                    var p = o.getPath() + window.location.search;
                } else var p = '';
                var q = i(n).getQualifiedURI().setFragment(p).toString(),
                    r = 2048;
                if (q.length > r) q = q.substring(0, r) + '...';
                g.set('x-referer', q);
            },
            go: function (n, o, p) {
                if (window.history && history.pushState) {
                    o || typeof (n) == 'number';
                    var q = i(n).removeQueryData('ref').toString();
                    m.lastChanged = Date.now();
                    this.lastURI = q;
                    if (p) {
                        window.history.replaceState(n, null, q);
                    } else window.history.pushState(n, null, q);
                    if (j.safari() < 534) m._updateRefererURI(n);
                    return false;
                }
                m.debug('go: ' + n);
                if (o === undefined) o = true;
                if (!m.enabled) if (!o) return false;
                if (typeof (n) == 'number') {
                    if (!n) return false;
                    var r = n + m.current,
                        s = Math.max(0, Math.min(m.history.length - 1, r));
                    m.current = s;
                    r = m.history[s].getFragment() || m.orig_fragment;
                    r = i(r).removeQueryData('ref').getUnqualifiedURI().toString();
                    m.fragment = r;
                    m.lastChanged = Date.now();
                    if (j.ie() < 8) {
                        if (m.fragmentTimeout) clearTimeout(m.fragmentTimeout);
                        m._temporary_fragment = r;
                        m.fragmentTimeout = setTimeout(function () {
                            window.location.hash = '#!' + r;
                            delete m._temporary_fragment;
                        }, 750, false);
                        if (!m.user) m.nextframe(r, p);
                    } else if (!m.user) l(window.location, window.location.href.split('#')[0] + '#!' + r, p);
                    if (o) m.notify(r);
                    m._updateRefererURI(r);
                    return false;
                }
                n = i(n);
                if (n.getDomain() == i().getDomain()) n = i('#' + n.getUnqualifiedURI());
                var t = m.history[m.current].getFragment(),
                    u = n.getFragment();
                if (u == t || (t == m.orig_fragment && u == m.canonical.getFragment())) {
                    if (o) m.notify(u);
                    m._updateRefererURI(u);
                    return false;
                }
                if (p) m.current--;
                var v = (m.history.length - m.current) - 1;
                m.history.splice(m.current + 1, v);
                m.history.push(i(n));
                return m.go(1, o, p);
            },
            getCurrentFragment: function () {
                var n = m._temporary_fragment !== undefined ? m._temporary_fragment : i.getRequestURI(false).getFragment();
                return n == m.orig_fragment ? m.canonical.getFragment() : n;
            }
        };
    e.exports = m;
});