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node_modules/rxjs/dist/esm5/internal/operators/mergeInternals.js

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+import { innerFrom } from '../observable/innerFrom';
+import { executeSchedule } from '../util/executeSchedule';
+import { createOperatorSubscriber } from './OperatorSubscriber';
+export function mergeInternals(source, subscriber, project, concurrent, onBeforeNext, expand, innerSubScheduler, additionalFinalizer) {
+    var buffer = [];
+    var active = 0;
+    var index = 0;
+    var isComplete = false;
+    var checkComplete = function () {
+        if (isComplete && !buffer.length && !active) {
+            subscriber.complete();
+        }
+    };
+    var outerNext = function (value) { return (active < concurrent ? doInnerSub(value) : buffer.push(value)); };
+    var doInnerSub = function (value) {
+        expand && subscriber.next(value);
+        active++;
+        var innerComplete = false;
+        innerFrom(project(value, index++)).subscribe(createOperatorSubscriber(subscriber, function (innerValue) {
+            onBeforeNext === null || onBeforeNext === void 0 ? void 0 : onBeforeNext(innerValue);
+            if (expand) {
+                outerNext(innerValue);
+            }
+            else {
+                subscriber.next(innerValue);
+            }
+        }, function () {
+            innerComplete = true;
+        }, undefined, function () {
+            if (innerComplete) {
+                try {
+                    active--;
+                    var _loop_1 = function () {
+                        var bufferedValue = buffer.shift();
+                        if (innerSubScheduler) {
+                            executeSchedule(subscriber, innerSubScheduler, function () { return doInnerSub(bufferedValue); });
+                        }
+                        else {
+                            doInnerSub(bufferedValue);
+                        }
+                    };
+                    while (buffer.length && active < concurrent) {
+                        _loop_1();
+                    }
+                    checkComplete();
+                }
+                catch (err) {
+                    subscriber.error(err);
+                }
+            }
+        }));
+    };
+    source.subscribe(createOperatorSubscriber(subscriber, outerNext, function () {
+        isComplete = true;
+        checkComplete();
+    }));
+    return function () {
+        additionalFinalizer === null || additionalFinalizer === void 0 ? void 0 : additionalFinalizer();
+    };
+}
+//# sourceMappingURL=mergeInternals.js.map