react-native
Version:
A framework for building native apps using React
89 lines (82 loc) • 2.34 kB
JavaScript
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @polyfill
*/
/* eslint-disable strict */
let _inGuard = 0;
/**
* This is the error handler that is called when we encounter an exception
* when loading a module. This will report any errors encountered before
* ExceptionsManager is configured.
*/
let _globalHandler = function onError(e) {
throw e;
};
/**
* The particular require runtime that we are using looks for a global
* `ErrorUtils` object and if it exists, then it requires modules with the
* error handler specified via ErrorUtils.setGlobalHandler by calling the
* require function with applyWithGuard. Since the require module is loaded
* before any of the modules, this ErrorUtils must be defined (and the handler
* set) globally before requiring anything.
*/
const ErrorUtils = {
setGlobalHandler: function(fun) {
_globalHandler = fun;
},
getGlobalHandler: function() {
return _globalHandler;
},
reportError: function(error) {
_globalHandler && _globalHandler(error);
},
reportFatalError: function(error) {
_globalHandler && _globalHandler(error, true);
},
applyWithGuard: function(fun, context, args) {
try {
_inGuard++;
return fun.apply(context, args);
} catch (e) {
ErrorUtils.reportError(e);
} finally {
_inGuard--;
}
},
applyWithGuardIfNeeded: function(fun, context, args) {
if (ErrorUtils.inGuard()) {
return fun.apply(context, args);
} else {
ErrorUtils.applyWithGuard(fun, context, args);
}
},
inGuard: function() {
return _inGuard;
},
guard: function(fun, name, context) {
if (typeof fun !== 'function') {
console.warn('A function must be passed to ErrorUtils.guard, got ', fun);
return null;
}
name = name || fun.name || '<generated guard>';
function guarded() {
return (
ErrorUtils.applyWithGuard(
fun,
context || this,
arguments,
null,
name
)
);
}
return guarded;
}
};
global.ErrorUtils = ErrorUtils;