Bug 1817705 - Add convert to event/task in mail context menu. r=aleca

Differential Revision: https://phabricator.services.mozilla.com/D182571

--HG--
extra : amend_source : 74663a6df9a88b6e75b081b671ea27c828d453b5

mail/base/content/mailContext.js

@@ -303,7 +303,6 @@ var mailContextMenu = {
     for (let id of [
       "mailContext-openInBrowser",
       "mailContext-recalculateJunkScore",
-      "mailContext-calendar-convert-menu",
     ]) {
       showItem(id, false);
     }
@@ -382,7 +381,11 @@ var mailContextMenu = {
       document.getElementById("mailContext-moveToFolderAgain")
     );
 
-    // setSingleSelection("mailContext-calendar-convert-menu");
+    // Show only if a message is actively selected in the DOM.
+    showItem(
+      "mailContext-calendar-convert-menu",
+      numSelectedMessages == 1 && !this.selectionIsOverridden
+    );
 
     document.l10n.setAttributes(
       document.getElementById("mailContext-delete"),
@@ -598,12 +601,12 @@ var mailContextMenu = {
       }
 
       // Calendar Convert sub-menu
-      // case "mailContext-calendar-convert-event-menuitem":
-      //   calendarExtract.extractFromEmail(true);
-      //   break;
-      // case "mailContext-calendar-convert-task-menuitem":
-      //   calendarExtract.extractFromEmail(false);
-      //   break;
+      case "mailContext-calendar-convert-event-menuitem":
+        top.calendarExtract.extractFromEmail(true);
+        break;
+      case "mailContext-calendar-convert-task-menuitem":
+        top.calendarExtract.extractFromEmail(false);
+        break;
 
       // Save/print/download
       default: {

mail/base/test/browser/browser_mailContext.js

@@ -88,7 +88,7 @@ const mailContextData = {
   "mailContext-moveMenu": notExternal,
   "mailContext-copyMenu": true,
   "mailContext-decryptToFolder": ["multipleMessagesTree"],
-  "mailContext-calendar-convert-menu": [], // Hidden in all contexts.
+  "mailContext-calendar-convert-menu": allSingleSelection,
   "mailContext-delete": notExternal,
   "mailContext-ignoreThread": allThreePane,
   "mailContext-ignoreSubthread": allThreePane,