Overwrite Global Console

console.js

// overwrite global console based on kissy
//
// chrome 的 console 不能转移this，即不能call或者apply到其他分组上
// http://code.google.com/p/chromium/issues/detail?id=48662
// http://stackoverflow.com/questions/5133649/alias-to-chrome-console-log
//
// firefox 不能覆写console对象，只定义了Getter，直接覆盖方法属性
//
// 注意有些方法不完全兼容
// 比如console.profile/profileEnd在IE的表现跟
// Webkit DevTools/Firebug的表现不一致
// 所以后续有一次try/catch
//
// http://twitter.com/yyfrankyy/status/65769142648717312
var S = KISSY,
    global = S.__HOST,
    _cslCache = [],
    origin_csl = global.console || {},
    global_csl = {},
    _csl = {};

// copy all console function into a new object
S.each(origin_csl, function(method, i) {
    var log = [i, method];
    _cslCache.push(log);
    global_csl[log[0]] = log[1];
});

// TODO move this into event.
var debugStyle = {
    'rule': 'color: green',
    'form': 'background: #d5ffc4',
    'monitor': 'color: #0c2d75',
    'realPay': 'color: red; font-weight: bold; text-align: right'
};

// reset for all console methods;
S.each(['assert', 'count', 'debug', 'dir', 'dirxml', 'error',
    'group', 'groupCollapsed', 'groupEnd', 'info', 'log',
    'markTimeline', 'memory', 'profile', 'profileEnd',
    'profiles', 'time', 'timeEnd', 'trace', 'warn'],
    function(method) {
        if (S.UA.ie && S.UA.ie < 8) {
            _csl[method] = !S.isEmptyObject(origin_csl) ?
                origin_csl.log : function() {
                    /*ignore*/
                };
            return;
        }
        _csl[method] = function() {
            var bind = Function.prototype.bind,
                args = [].slice.call(arguments),
                trace = '',
                prefix = '';

            if (!(global_csl && S.Config.debug) || !bind) return args[0];

            if (!(method in global_csl)) {
                prefix = '[' + method.toUpperCase() + '] ';
                method = 'log';
                args[0] = prefix + args[0];
            }

            // firebug可以用css
            if (S.UA.firefox) {
                for (var i in debugStyle) {
                    if (!(new RegExp('^\\[' + i + '\\]')
                            .test(args[0]))) continue;
                    var lc = '%c' + args.shift();
                    args.unshift(lc, debugStyle[i]);
                    break;
                }
            }
            _csl.fire('BeforeLog', {args: args});

            // 设置log过滤器
            if (!(!origin_csl.filter || bind.call(
                origin_csl.filter,
                origin_csl
            ).apply(origin_csl, args))) return args[0];

            try {
                bind.call(
                    global_csl[method],
                    origin_csl
                ).apply(origin_csl, args);
            } catch (e) {}
            return args[0];
        };
    });

S.mix(_csl, S.EventTarget);

// exclude loaded logs
_csl.filter = function(arg) {
    return !(/(loaded\.)$/.test(arg) || /^(standard)/.test(arg));
};

S.each(_csl, function(fn, i) {
    origin_csl[i] = fn;
});

global.console = _csl;
// }}}