planning

node_modules/@juggle/resize-observer/lib/ResizeObserverController.js

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+import { scheduler, updateCount } from './utils/scheduler';
+import { ResizeObservation } from './ResizeObservation';
+import { ResizeObserverDetail } from './ResizeObserverDetail';
+import { resizeObservers } from './utils/resizeObservers';
+var observerMap = new WeakMap();
+var getObservationIndex = function (observationTargets, target) {
+    for (var i = 0; i < observationTargets.length; i += 1) {
+        if (observationTargets[i].target === target) {
+            return i;
+        }
+    }
+    return -1;
+};
+var ResizeObserverController = (function () {
+    function ResizeObserverController() {
+    }
+    ResizeObserverController.connect = function (resizeObserver, callback) {
+        var detail = new ResizeObserverDetail(resizeObserver, callback);
+        observerMap.set(resizeObserver, detail);
+    };
+    ResizeObserverController.observe = function (resizeObserver, target, options) {
+        var detail = observerMap.get(resizeObserver);
+        var firstObservation = detail.observationTargets.length === 0;
+        if (getObservationIndex(detail.observationTargets, target) < 0) {
+            firstObservation && resizeObservers.push(detail);
+            detail.observationTargets.push(new ResizeObservation(target, options && options.box));
+            updateCount(1);
+            scheduler.schedule();
+        }
+    };
+    ResizeObserverController.unobserve = function (resizeObserver, target) {
+        var detail = observerMap.get(resizeObserver);
+        var index = getObservationIndex(detail.observationTargets, target);
+        var lastObservation = detail.observationTargets.length === 1;
+        if (index >= 0) {
+            lastObservation && resizeObservers.splice(resizeObservers.indexOf(detail), 1);
+            detail.observationTargets.splice(index, 1);
+            updateCount(-1);
+        }
+    };
+    ResizeObserverController.disconnect = function (resizeObserver) {
+        var _this = this;
+        var detail = observerMap.get(resizeObserver);
+        detail.observationTargets.slice().forEach(function (ot) { return _this.unobserve(resizeObserver, ot.target); });
+        detail.activeTargets.splice(0, detail.activeTargets.length);
+    };
+    return ResizeObserverController;
+}());
+export { ResizeObserverController };