Change PreviewResult to hold a list of message-level pairs

PreviewResult.messages is now list[tuple[str, MsgLevelType]], allowing
a single result to carry multiple sections with different levels.
The preview_action signature drops list[PreviewResult] since the
dataclass itself handles multiple sections. Existing str-returning
previews still work and will be converted in follow-up PRs.

archinstall/lib/global_menu.py

@@ -502,12 +502,12 @@ class GlobalMenu(AbstractMenu[None]):
 
 		return warnings
 
-	def _prev_install_invalid_config(self, item: MenuItem) -> str | PreviewResult | list[PreviewResult] | None:
+	def _prev_install_invalid_config(self, item: MenuItem) -> PreviewResult | None:
 		self.sync_all_to_config()
 		config_output = ConfigurationOutput(self._arch_config)
 
 		warnings = self._get_install_warnings()
-		sections: list[PreviewResult] = []
+		messages: list[tuple[str, MsgLevelType]] = []
 
 		errors = ''
 		if missing := self._missing_configs():
@@ -522,20 +522,20 @@ class GlobalMenu(AbstractMenu[None]):
 				errors += f'{tr("Invalid configuration:")}\n- {error}'
 
 		if errors:
-			sections.append(PreviewResult(errors, MsgLevelType.MsgError))
+			messages.append((errors, MsgLevelType.MsgError))
 		else:
-			sections.append(PreviewResult(tr('Ready to install'), MsgLevelType.MsgInfo))
+			messages.append((tr('Ready to install'), MsgLevelType.MsgInfo))
 
 		if warnings:
 			text = f'{tr("Warnings:")}\n' + '\n'.join(f'- {w}' for w in warnings)
-			sections.append(PreviewResult(text, MsgLevelType.MsgWarning))
+			messages.append((text, MsgLevelType.MsgWarning))
 
 		if not errors:
 			summary = config_output.as_summary()
 			if summary:
-				sections.append(PreviewResult(summary, MsgLevelType.MsgNone))
+				messages.append((summary, MsgLevelType.MsgNone))
 
-		return sections
+		return PreviewResult(messages)
 
 	def _prev_profile(self, item: MenuItem) -> str | None:
 		profile_config: ProfileConfiguration | None = item.value

archinstall/tui/components.py

@@ -27,22 +27,19 @@ from archinstall.tui.result import Result, ResultType
 ValueT = TypeVar('ValueT')
 
 
-def _update_preview(widget: Label, result: str | PreviewResult | list[PreviewResult] | None) -> None:
+def _update_preview(widget: Label, result: str | PreviewResult | None) -> None:
 	if result is None:
 		widget.update('')
 		return
 
 	if isinstance(result, str):
 		widget.update(result)
-	elif isinstance(result, PreviewResult):
-		text = Text(result.message, style=result.msg_level.style())
-		widget.update(text)
 	else:
 		text = Text()
-		for i, section in enumerate(result):
+		for i, (message, level) in enumerate(result.messages):
 			if i > 0:
 				text.append('\n\n')
-			text.append(section.message, style=section.msg_level.style())
+			text.append(message, style=level.style())
 		widget.update(text)
 
 

archinstall/tui/menu_item.py

@@ -29,8 +29,7 @@ class MsgLevelType(Enum):
 
 @dataclass
 class PreviewResult:
-	message: str
-	msg_level: MsgLevelType
+	messages: list[tuple[str, MsgLevelType]]
 
 
 @dataclass
@@ -44,7 +43,7 @@ class MenuItem:
 	dependencies: list[str | Callable[[], bool]] = field(default_factory=list)
 	dependencies_not: list[str] = field(default_factory=list)
 	display_action: Callable[[Any], str] | None = None
-	preview_action: Callable[[Self], str | PreviewResult | list[PreviewResult] | None] | None = None
+	preview_action: Callable[[Self], str | PreviewResult | None] | None = None
 	key: str | None = None
 
 	_id: str = ''