Bundle dev version of the web-ui

gns3server/static/web-ui/assets/xpra-html5/js/OffscreenDecodeWorkerHelper.js

@@ -0,0 +1,73 @@
+/*
+ * This file is part of Xpra.
+ * Copyright (C) 2021 Tijs van der Zwaan <tijzwa@vpo.nl>
+ * Copyright (c) 2022 Antoine Martin <antoine@xpra.org>
+ * Licensed under MPL 2.0, see:
+ * http://www.mozilla.org/MPL/2.0/
+ *
+ */
+
+/*
+ * Helper for offscreen decoding and painting.
+ */
+
+const XpraOffscreenWorker = {
+  // OffscreenCanvas supported since v.16.4
+  isSafariVersionSupported() {
+    const match = navigator.userAgent.match(/version\/(\d+\.\d+)/i);
+    if (match && match[1]) {
+      const version = parseFloat(match[1]);
+      // Safari is buggy, see #227
+      return version >= 999.9;
+    }
+    return false;
+  },
+
+  // OffscreenCanvas supported since v.105 (with fixed added for 107/108)
+  isFirefoxVersionSupported() {
+    const match = navigator.userAgent.match(/firefox\/(\d+)/i);
+    if (match && match[1]) {
+      const version = parseInt(match[1], 10);
+      return version >= 108;
+    }
+    return false;
+  },
+
+  isAvailable(ssl) {
+    if (Utilities.isSafari() && !this.isSafariVersionSupported()) {
+      // console.log("offscreen canvas is not supported with this version of Safari");
+      return false;
+    }
+
+    if (Utilities.isWebkit() && !Utilities.isChrome()) {
+      // console.log("offscreen canvas is not supported with this webkit browser");
+      return false;
+    }
+
+    if (Utilities.isFirefox() && !this.isFirefoxVersionSupported()) {
+      // console.log("offscreen canvas is not supported with this version of Firefox");
+      return false;
+    }
+
+    if (Utilities.isChrome() && !ssl) {
+      // console.log("offscreen canvas requires https with Chrome");
+      return false;
+    }
+
+    if (typeof OffscreenCanvas !== "undefined") {
+      //we also need the direct constructor:
+      try {
+        new OffscreenCanvas(256, 256);
+        // console.log("offscreen canvas is available with", navigator.userAgent);
+        return true;
+      } catch (error) {
+        console.warn("unable to instantiate an offscreen canvas:", error);
+      }
+    }
+    console.warn(
+      "Offscreen decoding is not available. Please consider using " +
+      "Google Chrome, Firefox >= 108 for better performance."
+    );
+    return false;
+  },
+};