tw.view: new `post_action_cleanup()` method

mmgen/proto/xmr/tw/view.py

@@ -222,8 +222,7 @@ class MoneroTwView:
 	class action(TwView.action):
 
 		async def a_sync_wallets(self, parent):
-			from ....util import msg, msg_r, ymsg
-			from ....tw.view import CUR_HOME, ERASE_ALL
+			from ....util import msg, ymsg
 			msg('')
 			try:
 				op = xmrwallet_op('sync', parent.cfg, None, None, compat_call=True)
@@ -232,11 +231,9 @@ class MoneroTwView:
 					import asyncio
 					ymsg(str(e))
 					await asyncio.sleep(2)
-					msg_r(CUR_HOME + ERASE_ALL)
 					return False
 				raise
 			await op.restart_wallet_daemon()
 			await op.main()
 			await parent.get_data()
-			if parent.scroll:
-				msg_r(CUR_HOME + ERASE_ALL)
+			return 'erase'

mmgen/tw/prune.py

@@ -12,11 +12,10 @@
 tw.prune: Tracking wallet pruned listaddresses class for the MMGen suite
 """
 
-from ..util import msg, msg_r, rmsg, ymsg
+from ..util import msg, rmsg, ymsg
 from ..color import red, green, gray, yellow
 from ..obj import ListItemAttr
 from .addresses import TwAddresses
-from .view import CUR_HOME, ERASE_ALL
 
 class TwAddressesPrune(TwAddresses):
 
@@ -155,15 +154,12 @@ class TwAddressesPrune(TwAddresses):
 				else:
 					e.tag = True
 
-			if parent.scroll:
-				msg_r(CUR_HOME + ERASE_ALL)
+			return 'erase'
 
 		async def a_unprune(self, parent):
 			for addrnum in self.get_addrnums(parent, 'unprune'):
 				parent.disp_data[addrnum-1].tag = False
-
-			if parent.scroll:
-				msg_r(CUR_HOME + ERASE_ALL)
+			return 'erase'
 
 		async def a_clear_prune_list(self, parent):
 			for d in parent.data:

mmgen/tw/view.py

@@ -692,11 +692,19 @@ class TwView(MMGenObject, metaclass=AsyncInit):
 					return ur(idx, None)
 			await do_error_msg()
 
+	async def post_action_cleanup(self, ret):
+		if self.scroll and (ret is False or ret in ('redraw', 'erase')):
+			# error messages could leave screen in messy state, so do complete redraw:
+			msg_r(
+				CUR_HOME + ERASE_ALL + (
+					'' if ret == 'erase' else
+					await self.format(display_type='squeezed', interactive=True, scroll=True)))
+
 	class action:
 
 		@enable_echo
 		async def run(self, parent, action_method):
-			return await action_method(parent)
+			await parent.post_action_cleanup(await action_method(parent))
 
 		async def a_print_detail(self, parent):
 			return await self._print(parent, output_type='detail')
@@ -763,6 +771,7 @@ class TwView(MMGenObject, metaclass=AsyncInit):
 				#  None:   action aborted by user or no action performed
 				#  'redo': user will be re-prompted for item number
 				#  'redraw': action successfully performed, screen will be redrawn
+				#  'erase': action successfully performed, screen will be erased
 				if usr_ret := await parent.get_idx_from_user(action_method.__name__):
 					ret = await action_method(parent, usr_ret.idx, usr_ret.acct_addr_idx)
 				else:
@@ -771,11 +780,7 @@ class TwView(MMGenObject, metaclass=AsyncInit):
 					break
 				await asyncio.sleep(0.5)
 
-			if parent.scroll and (ret is False or ret == 'redraw'):
-				# error messages could leave screen in messy state, so do complete redraw:
-				msg_r(
-					CUR_HOME + ERASE_ALL +
-					await parent.format(display_type='squeezed', interactive=True, scroll=True))
+			await parent.post_action_cleanup(ret)
 
 		async def i_balance_refresh(self, parent, idx, acct_addr_idx=None):
 			if not parent.keypress_confirm(