Restore all cursors, instead of only the current window (#978)

If we have the same buffer open in multiple windows/tabs, we'll only
restore the current window's cursor.

Iterate through all tabs and windows, and save/restore all cursor
positions of windows that contain our buffer.

Addendum to #433.

diff --git a/plugin/black.vim b/plugin/black.vim
index 8e05c2a9d7647d75be6a77ad35e1ec6452c20213..385d0e1bd988d38d196fe0ce687cbd305a06c95a 100644 (file)
--- a/plugin/black.vim
+++ b/plugin/black.vim
@@ -122,12 +122,20 @@ def Black():
   except Exception as exc:
     print(exc)
   else:
-    cursor = vim.current.window.cursor
+    current_buffer = vim.current.window.buffer
+    cursors = []
+    for i, tabpage in enumerate(vim.tabpages):
+      if tabpage.valid:
+        for j, window in enumerate(tabpage.windows):
+          if window.valid and window.buffer == current_buffer:
+            cursors.append((i, j, window.cursor))
     vim.current.buffer[:] = new_buffer_str.split('\n')[:-1]
-    try:
-      vim.current.window.cursor = cursor
-    except vim.error:
-      vim.current.window.cursor = (len(vim.current.buffer), 0)
+    for i, j, cursor in cursors:
+      window = vim.tabpages[i].windows[j]
+      try:
+        window.cursor = cursor
+      except vim.error:
+        window.cursor = (len(window.buffer), 0)
     print(f'Reformatted in {time.time() - start:.4f}s.')
 
 def BlackUpgrade():