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// ==========================================
// Copyright 2013 Twitter, Inc
// Licensed under The MIT License
// http://opensource.org/licenses/MIT
// ==========================================
"use strict";
define(
[
'./compose',
'./utils'
],
function (compose, util) {
var actionSymbols = {
on:'<-',
trigger: '->',
off: 'x '
};
function elemToString(elem) {
var tagStr = elem.tagName ? elem.tagName.toLowerCase() : elem.toString();
var classStr = elem.className ? "." + (elem.className) : "";
var result = tagStr + classStr;
return elem.tagName ? ['\'', '\''].join(result) : result;
}
function log(action, component, eventArgs) {
var name, elem, fn, fnName, logFilter, toRegExp, actionLoggable, nameLoggable;
if (typeof eventArgs[eventArgs.length-1] == 'function') {
fn = eventArgs.pop();
fn = fn.unbound || fn; //use unbound version if any (better info)
}
if (typeof eventArgs[eventArgs.length - 1] == 'object') {
eventArgs.pop(); //trigger data arg - not logged right now
}
if (eventArgs.length == 2) {
elem = eventArgs[0];
name = eventArgs[1];
} else {
elem = component.$node[0];
name = eventArgs[0];
}
if (window.DEBUG && window.DEBUG.enabled) {
logFilter = DEBUG.events.logFilter;
// no regex for you, actions...
actionLoggable = logFilter.actions=="all" || (logFilter.actions.indexOf(action) > -1);
// event name filter allow wildcards or regex...
toRegExp = function(expr) {
return expr.test ? expr : new RegExp("^" + expr.replace(/\*/g, ".*") + "$");
};
nameLoggable =
logFilter.eventNames=="all" ||
logFilter.eventNames.some(function(e) {return toRegExp(e).test(name)});
if (actionLoggable && nameLoggable) {
console.info(
actionSymbols[action],
action,
'[' + name + ']',
elemToString(elem),
component.constructor.toString(),
fn && (fnName = fn.name || fn.displayName) && '-> ' + fnName
);
}
}
}
function withLogging() {
this.before('trigger', function() {
log('trigger', this, util.toArray(arguments));
});
this.before('on', function() {
log('on', this, util.toArray(arguments));
});
this.before('off', function(eventArgs) {
log('off', this, util.toArray(arguments));
});
}
return withLogging;
}
);
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