Comment on attachment 8371072
WIP patch 3

>+    newFolderName.Assign(folderName);
>+    bool containsChild = true;
>+    uint32_t i = 1;
>+    while (containsChild) {
>+      rv = ContainsChildNamed(newFolderName, &containsChild);
>+      NS_ENSURE_SUCCESS(rv, rv);
>+      if (!containsChild)
>+        break;
>+      // This could be localizable but Toolkit is fine without it, see
>+      // mozilla/toolkit/content/contentAreaUtils.js::uniqueFile()
>+      i++;
>+      newFolderName.Assign(folderName);
>+      newFolderName.AppendLiteral("(");
>+      newFolderName.AppendInt(i);
>+      newFolderName.AppendLiteral(")");
>+    }
bool containsChild;
rv = ContainsChildNamed(folderName, &containsChild);
NS_ENSURE_SUCCESS(rv, rv);
while (containsChild) {
  i++;
  newFolderName.Assign(folderName);
  newFolderName.AppendLiteral("(");
  newFolderName.AppendInt(i);
  newFolderName.AppendLiteral(")");
  rv = ContainsChildNamed(newFolderName, &containsChild);
  NS_ENSURE_SUCCESS(rv, rv);
}

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https://bugs.launchpad.net/bugs/214366

Title:
  Can't delete a folder if Trash already contains a folder of the same
  name

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