1 files changed, 82 insertions, 0 deletions
diff --git a/mobile/android/components/geckoview/ShareDelegate.jsm b/mobile/android/components/geckoview/ShareDelegate.jsm
new file mode 100644
index 0000000000..1e3a133953
--- /dev/null
+++ b/mobile/android/components/geckoview/ShareDelegate.jsm
@@ -0,0 +1,82 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+var EXPORTED_SYMBOLS = ["ShareDelegate"];
+
+const { GeckoViewUtils } = ChromeUtils.importESModule(
+  "resource://gre/modules/GeckoViewUtils.sys.mjs"
+);
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  GeckoViewPrompter: "resource://gre/modules/GeckoViewPrompter.sys.mjs",
+});
+
+const domBundle = Services.strings.createBundle(
+  "chrome://global/locale/dom/dom.properties"
+);
+
+const { debug, warn } = GeckoViewUtils.initLogging("ShareDelegate");
+
+class ShareDelegate {
+  init(aParent) {
+    this._openerWindow = aParent;
+  }
+
+  get openerWindow() {
+    return this._openerWindow;
+  }
+
+  async share(aTitle, aText, aUri) {
+    const ABORT = 2;
+    const FAILURE = 1;
+    const SUCCESS = 0;
+
+    const msg = {
+      type: "share",
+      title: aTitle,
+      text: aText,
+      uri: aUri ? aUri.displaySpec : null,
+    };
+    const prompt = new lazy.GeckoViewPrompter(this._openerWindow);
+    const result = await new Promise(resolve => {
+      prompt.asyncShowPrompt(msg, resolve);
+    });
+
+    if (!result) {
+      // A null result is treated as a dismissal in GeckoViewPrompter.
+      throw new DOMException(
+        domBundle.GetStringFromName("WebShareAPI_Aborted"),
+        "AbortError"
+      );
+    }
+
+    const res = result && result.response;
+    switch (res) {
+      case FAILURE:
+        throw new DOMException(
+          domBundle.GetStringFromName("WebShareAPI_Failed"),
+          "DataError"
+        );
+      case ABORT: // Handle aborted attempt and invalid responses the same.
+        throw new DOMException(
+          domBundle.GetStringFromName("WebShareAPI_Aborted"),
+          "AbortError"
+        );
+      case SUCCESS:
+        return;
+      default:
+        throw new DOMException("Unknown error.", "UnknownError");
+    }
+  }
+}
+
+ShareDelegate.prototype.classID = Components.ID(
+  "{1201d357-8417-4926-a694-e6408fbedcf8}"
+);
+ShareDelegate.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsISharePicker",
+]);