/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(factory());
}(this, (function () { 'use strict';

/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
/**
 * @fileoverview
 * @suppress {globalThis,undefinedVars}
 */
Zone.__load_patch('Error', function (global, Zone, api) {
    /*
     * This code patches Error so that:
     *   - It ignores un-needed stack frames.
     *   - It Shows the associated Zone for reach frame.
     */
    var blacklistedStackFramesSymbol = api.symbol('blacklistedStackFrames');
    var NativeError = global[api.symbol('Error')] = global['Error'];
    // Store the frames which should be removed from the stack frames
    var blackListedStackFrames = {};
    // We must find the frame where Error was created, otherwise we assume we don't understand stack
    var zoneAwareFrame1;
    var zoneAwareFrame2;
    global['Error'] = ZoneAwareError;
    var stackRewrite = 'stackRewrite';
    /**
     * This is ZoneAwareError which processes the stack frame and cleans up extra frames as well as
     * adds zone information to it.
     */
    function ZoneAwareError() {
        var _this = this;
        // We always have to return native error otherwise the browser console will not work.
        var error = NativeError.apply(this, arguments);
        // Save original stack trace
        var originalStack = error['originalStack'] = error.stack;
        // Process the stack trace and rewrite the frames.
        if (ZoneAwareError[stackRewrite] && originalStack) {
            var frames_1 = originalStack.split('\n');
            var zoneFrame = api.currentZoneFrame();
            var i = 0;
            // Find the first frame
            while (!(frames_1[i] === zoneAwareFrame1 || frames_1[i] === zoneAwareFrame2) &&
                i < frames_1.length) {
                i++;
            }
            for (; i < frames_1.length && zoneFrame; i++) {
                var frame = frames_1[i];
                if (frame.trim()) {
                    switch (blackListedStackFrames[frame]) {
                        case 0 /* blackList */:
                            frames_1.splice(i, 1);
                            i--;
                            break;
                        case 1 /* transition */:
                            if (zoneFrame.parent) {
                                // This is the special frame where zone changed. Print and process it accordingly
                                zoneFrame = zoneFrame.parent;
                            }
                            else {
                                zoneFrame = null;
                            }
                            frames_1.splice(i, 1);
                            i--;
                            break;
                        default:
                            frames_1[i] += " [" + zoneFrame.zone.name + "]";
                    }
                }
            }
            try {
                error.stack = error.zoneAwareStack = frames_1.join('\n');
            }
            catch (e) {
                // ignore as some browsers don't allow overriding of stack
            }
        }
        if (this instanceof NativeError && this.constructor != NativeError) {
            // We got called with a `new` operator AND we are subclass of ZoneAwareError
            // in that case we have to copy all of our properties to `this`.
            Object.keys(error).concat('stack', 'message').forEach(function (key) {
                var value = error[key];
                if (value !== undefined) {
                    try {
                        _this[key] = value;
                    }
                    catch (e) {
                        // ignore the assignment in case it is a setter and it throws.
                    }
                }
            });
            return this;
        }
        return error;
    }
    // Copy the prototype so that instanceof operator works as expected
    ZoneAwareError.prototype = NativeError.prototype;
    ZoneAwareError[blacklistedStackFramesSymbol] = blackListedStackFrames;
    ZoneAwareError[stackRewrite] = false;
    // those properties need special handling
    var specialPropertyNames = ['stackTraceLimit', 'captureStackTrace', 'prepareStackTrace'];
    // those properties of NativeError should be set to ZoneAwareError
    var nativeErrorProperties = Object.keys(NativeError);
    if (nativeErrorProperties) {
        nativeErrorProperties.forEach(function (prop) {
            if (specialPropertyNames.filter(function (sp) { return sp === prop; }).length === 0) {
                Object.defineProperty(ZoneAwareError, prop, {
                    get: function () {
                        return NativeError[prop];
                    },
                    set: function (value) {
                        NativeError[prop] = value;
                    }
                });
            }
        });
    }
    if (NativeError.hasOwnProperty('stackTraceLimit')) {
        // Extend default stack limit as we will be removing few frames.
        NativeError.stackTraceLimit = Math.max(NativeError.stackTraceLimit, 15);
        // make sure that ZoneAwareError has the same property which forwards to NativeError.
        Object.defineProperty(ZoneAwareError, 'stackTraceLimit', {
            get: function () {
                return NativeError.stackTraceLimit;
            },
            set: function (value) {
                return NativeError.stackTraceLimit = value;
            }
        });
    }
    if (NativeError.hasOwnProperty('captureStackTrace')) {
        Object.defineProperty(ZoneAwareError, 'captureStackTrace', {
            // add named function here because we need to remove this
            // stack frame when prepareStackTrace below
            value: function zoneCaptureStackTrace(targetObject, constructorOpt) {
                NativeError.captureStackTrace(targetObject, constructorOpt);
            }
        });
    }
    var ZONE_CAPTURESTACKTRACE = 'zoneCaptureStackTrace';
    Object.defineProperty(ZoneAwareError, 'prepareStackTrace', {
        get: function () {
            return NativeError.prepareStackTrace;
        },
        set: function (value) {
            if (!value || typeof value !== 'function') {
                return NativeError.prepareStackTrace = value;
            }
            return NativeError.prepareStackTrace = function (error, structuredStackTrace) {
                // remove additional stack information from ZoneAwareError.captureStackTrace
                if (structuredStackTrace) {
                    for (var i = 0; i < structuredStackTrace.length; i++) {
                        var st = structuredStackTrace[i];
                        // remove the first function which name is zoneCaptureStackTrace
                        if (st.getFunctionName() === ZONE_CAPTURESTACKTRACE) {
                            structuredStackTrace.splice(i, 1);
                            break;
                        }
                    }
                }
                return value.call(this, error, structuredStackTrace);
            };
        }
    });
    // Now we need to populate the `blacklistedStackFrames` as well as find the
    // run/runGuarded/runTask frames. This is done by creating a detect zone and then threading
    // the execution through all of the above methods so that we can look at the stack trace and
    // find the frames of interest.
    var ZONE_AWARE_ERROR = 'ZoneAwareError';
    var ERROR_DOT = 'Error.';
    var EMPTY = '';
    var RUN_GUARDED = 'runGuarded';
    var RUN_TASK = 'runTask';
    var RUN = 'run';
    var BRACKETS = '(';
    var AT = '@';
    var detectZone = Zone.current.fork({
        name: 'detect',
        onHandleError: function (parentZD, current, target, error) {
            if (error.originalStack && Error === ZoneAwareError) {
                var frames_2 = error.originalStack.split(/\n/);
                var runFrame = false, runGuardedFrame = false, runTaskFrame = false;
                while (frames_2.length) {
                    var frame = frames_2.shift();
                    // On safari it is possible to have stack frame with no line number.
                    // This check makes sure that we don't filter frames on name only (must have
                    // line number)
                    if (/:\d+:\d+/.test(frame)) {
                        // Get rid of the path so that we don't accidentally find function name in path.
                        // In chrome the separator is `(` and `@` in FF and safari
                        // Chrome: at Zone.run (zone.js:100)
                        // Chrome: at Zone.run (http://localhost:9876/base/build/lib/zone.js:100:24)
                        // FireFox: Zone.prototype.run@http://localhost:9876/base/build/lib/zone.js:101:24
                        // Safari: run@http://localhost:9876/base/build/lib/zone.js:101:24
                        var fnName = frame.split(BRACKETS)[0].split(AT)[0];
                        var frameType = 1;
                        if (fnName.indexOf(ZONE_AWARE_ERROR) !== -1) {
                            zoneAwareFrame1 = frame;
                            zoneAwareFrame2 = frame.replace(ERROR_DOT, EMPTY);
                            blackListedStackFrames[zoneAwareFrame2] = 0 /* blackList */;
                        }
                        if (fnName.indexOf(RUN_GUARDED) !== -1) {
                            runGuardedFrame = true;
                        }
                        else if (fnName.indexOf(RUN_TASK) !== -1) {
                            runTaskFrame = true;
                        }
                        else if (fnName.indexOf(RUN) !== -1) {
                            runFrame = true;
                        }
                        else {
                            frameType = 0 /* blackList */;
                        }
                        blackListedStackFrames[frame] = frameType;
                        // Once we find all of the frames we can stop looking.
                        if (runFrame && runGuardedFrame && runTaskFrame) {
                            ZoneAwareError[stackRewrite] = true;
                            break;
                        }
                    }
                }
            }
            return false;
        }
    });
    // carefully constructor a stack frame which contains all of the frames of interest which
    // need to be detected and blacklisted.
    var childDetectZone = detectZone.fork({
        name: 'child',
        onScheduleTask: function (delegate, curr, target, task) {
            return delegate.scheduleTask(target, task);
        },
        onInvokeTask: function (delegate, curr, target, task, applyThis, applyArgs) {
            return delegate.invokeTask(target, task, applyThis, applyArgs);
        },
        onCancelTask: function (delegate, curr, target, task) {
            return delegate.cancelTask(target, task);
        },
        onInvoke: function (delegate, curr, target, callback, applyThis, applyArgs, source) {
            return delegate.invoke(target, callback, applyThis, applyArgs, source);
        }
    });
    // we need to detect all zone related frames, it will
    // exceed default stackTraceLimit, so we set it to
    // larger number here, and restore it after detect finish.
    var originalStackTraceLimit = Error.stackTraceLimit;
    Error.stackTraceLimit = 100;
    // we schedule event/micro/macro task, and invoke them
    // when onSchedule, so we can get all stack traces for
    // all kinds of tasks with one error thrown.
    childDetectZone.run(function () {
        childDetectZone.runGuarded(function () {
            var fakeTransitionTo = function () { };
            childDetectZone.scheduleEventTask(blacklistedStackFramesSymbol, function () {
                childDetectZone.scheduleMacroTask(blacklistedStackFramesSymbol, function () {
                    childDetectZone.scheduleMicroTask(blacklistedStackFramesSymbol, function () {
                        throw new ZoneAwareError(ZoneAwareError, NativeError);
                    }, null, function (t) {
                        t._transitionTo = fakeTransitionTo;
                        t.invoke();
                    });
                }, null, function (t) {
                    t._transitionTo = fakeTransitionTo;
                    t.invoke();
                }, function () { });
            }, null, function (t) {
                t._transitionTo = fakeTransitionTo;
                t.invoke();
            }, function () { });
        });
    });
    Error.stackTraceLimit = originalStackTraceLimit;
});

})));
