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bourse_app/node_modules/fancy-canvas/device-pixel-ratio.js

@@ -0,0 +1,64 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.createObservable = void 0;
+var Observable = /** @class */ (function () {
+    function Observable(win) {
+        var _this = this;
+        this._resolutionListener = function () { return _this._onResolutionChanged(); };
+        this._resolutionMediaQueryList = null;
+        this._observers = [];
+        this._window = win;
+        this._installResolutionListener();
+    }
+    Observable.prototype.dispose = function () {
+        this._uninstallResolutionListener();
+        this._window = null;
+    };
+    Object.defineProperty(Observable.prototype, "value", {
+        get: function () {
+            return this._window.devicePixelRatio;
+        },
+        enumerable: false,
+        configurable: true
+    });
+    Observable.prototype.subscribe = function (next) {
+        var _this = this;
+        var observer = { next: next };
+        this._observers.push(observer);
+        return {
+            unsubscribe: function () {
+                _this._observers = _this._observers.filter(function (o) { return o !== observer; });
+            },
+        };
+    };
+    Observable.prototype._installResolutionListener = function () {
+        if (this._resolutionMediaQueryList !== null) {
+            throw new Error('Resolution listener is already installed');
+        }
+        var dppx = this._window.devicePixelRatio;
+        this._resolutionMediaQueryList = this._window.matchMedia("all and (resolution: ".concat(dppx, "dppx)"));
+        // IE and some versions of Edge do not support addEventListener/removeEventListener, and we are going to use the deprecated addListener/removeListener
+        this._resolutionMediaQueryList.addListener(this._resolutionListener);
+    };
+    Observable.prototype._uninstallResolutionListener = function () {
+        if (this._resolutionMediaQueryList !== null) {
+            // IE and some versions of Edge do not support addEventListener/removeEventListener, and we are going to use the deprecated addListener/removeListener
+            this._resolutionMediaQueryList.removeListener(this._resolutionListener);
+            this._resolutionMediaQueryList = null;
+        }
+    };
+    Observable.prototype._reinstallResolutionListener = function () {
+        this._uninstallResolutionListener();
+        this._installResolutionListener();
+    };
+    Observable.prototype._onResolutionChanged = function () {
+        var _this = this;
+        this._observers.forEach(function (observer) { return observer.next(_this._window.devicePixelRatio); });
+        this._reinstallResolutionListener();
+    };
+    return Observable;
+}());
+function createObservable(win) {
+    return new Observable(win);
+}
+exports.createObservable = createObservable;