3 files changed, 219 insertions, 0 deletions
diff --git a/browser/components/prompts/PromptCollection.sys.mjs b/browser/components/prompts/PromptCollection.sys.mjs
new file mode 100644
index 0000000000..b5cb57fe18
--- /dev/null
+++ b/browser/components/prompts/PromptCollection.sys.mjs
@@ -0,0 +1,193 @@
+/* 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/. */
+
+/**
+ * Implements nsIPromptCollection
+ *
+ * @class PromptCollection
+ */
+export class PromptCollection {
+  confirmRepost(browsingContext) {
+    let brandName;
+    try {
+      brandName = this.stringBundles.brand.GetStringFromName("brandShortName");
+    } catch (exception) {
+      // That's ok, we'll use a generic version of the prompt
+    }
+
+    let message;
+    let resendLabel;
+    try {
+      if (brandName) {
+        message = this.stringBundles.app.formatStringFromName(
+          "confirmRepostPrompt",
+          [brandName]
+        );
+      } else {
+        // Use a generic version of this prompt.
+        message = this.stringBundles.app.GetStringFromName(
+          "confirmRepostPrompt"
+        );
+      }
+      resendLabel =
+        this.stringBundles.app.GetStringFromName("resendButton.label");
+    } catch (exception) {
+      console.error("Failed to get strings from appstrings.properties");
+      return false;
+    }
+
+    let docViewer = browsingContext?.docShell?.docViewer;
+    let modalType = docViewer?.isTabModalPromptAllowed
+      ? Ci.nsIPromptService.MODAL_TYPE_CONTENT
+      : Ci.nsIPromptService.MODAL_TYPE_WINDOW;
+    let buttonFlags =
+      (Ci.nsIPromptService.BUTTON_TITLE_IS_STRING *
+        Ci.nsIPromptService.BUTTON_POS_0) |
+      (Ci.nsIPromptService.BUTTON_TITLE_CANCEL *
+        Ci.nsIPromptService.BUTTON_POS_1);
+    let buttonPressed = Services.prompt.confirmExBC(
+      browsingContext,
+      modalType,
+      null,
+      message,
+      buttonFlags,
+      resendLabel,
+      null,
+      null,
+      null,
+      {}
+    );
+
+    return buttonPressed === 0;
+  }
+
+  async asyncBeforeUnloadCheck(browsingContext) {
+    let title;
+    let message;
+    let leaveLabel;
+    let stayLabel;
+
+    try {
+      title = this.stringBundles.dom.GetStringFromName("OnBeforeUnloadTitle");
+      message = this.stringBundles.dom.GetStringFromName(
+        "OnBeforeUnloadMessage2"
+      );
+      leaveLabel = this.stringBundles.dom.GetStringFromName(
+        "OnBeforeUnloadLeaveButton"
+      );
+      stayLabel = this.stringBundles.dom.GetStringFromName(
+        "OnBeforeUnloadStayButton"
+      );
+    } catch (exception) {
+      console.error("Failed to get strings from dom.properties");
+      return false;
+    }
+
+    let docViewer = browsingContext?.docShell?.docViewer;
+
+    if (
+      (docViewer && !docViewer.isTabModalPromptAllowed) ||
+      !browsingContext.ancestorsAreCurrent
+    ) {
+      console.error("Can't prompt from inactive content viewer");
+      return true;
+    }
+
+    let buttonFlags =
+      Ci.nsIPromptService.BUTTON_POS_0_DEFAULT |
+      (Ci.nsIPromptService.BUTTON_TITLE_IS_STRING *
+        Ci.nsIPromptService.BUTTON_POS_0) |
+      (Ci.nsIPromptService.BUTTON_TITLE_IS_STRING *
+        Ci.nsIPromptService.BUTTON_POS_1);
+
+    let result = await Services.prompt.asyncConfirmEx(
+      browsingContext,
+      Services.prompt.MODAL_TYPE_CONTENT,
+      title,
+      message,
+      buttonFlags,
+      leaveLabel,
+      stayLabel,
+      null,
+      null,
+      false,
+      // Tell the prompt service that this is a permit unload prompt
+      // so that it can set the appropriate flag on the detail object
+      // of the events it dispatches.
+      { inPermitUnload: true }
+    );
+
+    return (
+      result.QueryInterface(Ci.nsIPropertyBag2).get("buttonNumClicked") == 0
+    );
+  }
+
+  confirmFolderUpload(browsingContext, directoryName) {
+    let title;
+    let message;
+    let acceptLabel;
+
+    try {
+      title = this.stringBundles.dom.GetStringFromName(
+        "FolderUploadPrompt.title"
+      );
+      message = this.stringBundles.dom.formatStringFromName(
+        "FolderUploadPrompt.message",
+        [directoryName]
+      );
+      acceptLabel = this.stringBundles.dom.GetStringFromName(
+        "FolderUploadPrompt.acceptButtonLabel"
+      );
+    } catch (exception) {
+      console.error("Failed to get strings from dom.properties");
+      return false;
+    }
+
+    let buttonFlags =
+      Services.prompt.BUTTON_TITLE_IS_STRING * Services.prompt.BUTTON_POS_0 +
+      Services.prompt.BUTTON_TITLE_CANCEL * Services.prompt.BUTTON_POS_1 +
+      Services.prompt.BUTTON_POS_1_DEFAULT;
+
+    return (
+      Services.prompt.confirmExBC(
+        browsingContext,
+        Services.prompt.MODAL_TYPE_TAB,
+        title,
+        message,
+        buttonFlags,
+        acceptLabel,
+        null,
+        null,
+        null,
+        {}
+      ) === 0
+    );
+  }
+}
+
+const BUNDLES = {
+  dom: "chrome://global/locale/dom/dom.properties",
+  app: "chrome://global/locale/appstrings.properties",
+  brand: "chrome://branding/locale/brand.properties",
+};
+
+PromptCollection.prototype.stringBundles = {};
+
+for (const [bundleName, bundleUrl] of Object.entries(BUNDLES)) {
+  ChromeUtils.defineLazyGetter(
+    PromptCollection.prototype.stringBundles,
+    bundleName,
+    function () {
+      let bundle = Services.strings.createBundle(bundleUrl);
+      if (!bundle) {
+        throw new Error("String bundle for dom not present!");
+      }
+      return bundle;
+    }
+  );
+}
+
+PromptCollection.prototype.QueryInterface = ChromeUtils.generateQI([
+  "nsIPromptCollection",
+]);
diff --git a/browser/components/prompts/components.conf b/browser/components/prompts/components.conf
new file mode 100644
index 0000000000..c17f8ed2b3
--- /dev/null
+++ b/browser/components/prompts/components.conf
@@ -0,0 +1,12 @@
+# 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/.
+
+Classes = [
+    {
+        'cid': '{7913837c-9623-11ea-bb37-0242ac130002}',
+        'contract_ids': ['@mozilla.org/embedcomp/prompt-collection;1'],
+        'esModule': 'resource:///modules/PromptCollection.sys.mjs',
+        'constructor': 'PromptCollection',
+    },
+]
diff --git a/browser/components/prompts/moz.build b/browser/components/prompts/moz.build
new file mode 100644
index 0000000000..98d52d5397
--- /dev/null
+++ b/browser/components/prompts/moz.build
@@ -0,0 +1,14 @@
+# 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/.
+
+with Files("**"):
+    BUG_COMPONENT = ("Toolkit", "Content Prompts")
+
+EXTRA_JS_MODULES += [
+    "PromptCollection.sys.mjs",
+]
+
+XPCOM_MANIFESTS += [
+    "components.conf",
+]