Update Input Dialog to use Validator

src/prompt_toolkit/filters/app.py

@@ -24,6 +24,7 @@
     "has_selection",
     "has_suggestion",
     "has_validation_error",
+    "has_any_validation_error",
     "is_done",
     "is_read_only",
     "is_multiline",
@@ -170,6 +171,32 @@ def has_validation_error() -> bool:
     return get_app().current_buffer.validation_error is not None
 
 
+@Condition
+def has_any_validation_error() -> bool:
+    "Any buffer in the layout has validation error."
+    from prompt_toolkit.layout.containers import Window
+    from prompt_toolkit.layout.controls import (
+        BufferControl,
+        SearchBufferControl,
+        UIControl,
+    )
+
+    # Extract buffer validation errors for buffer UIControl children classes
+    def get_buffer_from_content(content: UIControl) -> bool:
+        if isinstance(content, (BufferControl, SearchBufferControl)):
+            return content.buffer.validation_error is not None
+        else:
+            return False
+    # Get all windows for the current layout
+    windows = get_app().layout.find_all_windows()
+    # Iterate over each window in the layout and return true if any of the buffers have validation errors
+    for window in windows:
+        if isinstance(window, Window):
+            if get_buffer_from_content(window.content):
+                return True
+    return False
+
+
 @Condition
 def has_arg() -> bool:
     "Enable when the input processor has an 'arg'."

src/prompt_toolkit/shortcuts/dialogs.py

@@ -110,6 +110,7 @@ def input_dialog(
     cancel_text: str = "Cancel",
     completer: Completer | None = None,
     validator: Validator | None = None,
+    validate_while_typing: FilterOrBool = False,
     password: FilterOrBool = False,
     style: BaseStyle | None = None,
     default: str = "",
@@ -124,7 +125,9 @@ def accept(buf: Buffer) -> bool:
         return True  # Keep text.
 
     def ok_handler() -> None:
-        get_app().exit(result=textfield.text)
+        textfield.buffer.validate()  # validate one final time before exiting
+        if textfield.buffer.validation_error is None:
+            get_app().exit(result=textfield.text)
 
     ok_button = Button(text=ok_text, handler=ok_handler)
     cancel_button = Button(text=cancel_text, handler=_return_none)
@@ -135,6 +138,7 @@ def ok_handler() -> None:
         password=password,
         completer=completer,
         validator=validator,
+        validate_while_typing=validate_while_typing,
         accept_handler=accept,
     )
 
@@ -144,7 +148,7 @@ def ok_handler() -> None:
             [
                 Label(text=text, dont_extend_height=True),
                 textfield,
-                ValidationToolbar(),
+                ValidationToolbar(buffer=textfield.buffer),
             ],
             padding=D(preferred=1, max=1),
         ),

src/prompt_toolkit/widgets/base.py

@@ -179,6 +179,7 @@ def __init__(
         completer: Completer | None = None,
         complete_while_typing: FilterOrBool = True,
         validator: Validator | None = None,
+        validate_while_typing: FilterOrBool = False,
         accept_handler: BufferAcceptHandler | None = None,
         history: History | None = None,
         focusable: FilterOrBool = True,
@@ -215,6 +216,7 @@ def __init__(
         self.read_only = read_only
         self.wrap_lines = wrap_lines
         self.validator = validator
+        self.validate_while_typing = validate_while_typing
 
         self.buffer = Buffer(
             document=Document(text, 0),
@@ -225,6 +227,9 @@ def __init__(
                 lambda: is_true(self.complete_while_typing)
             ),
             validator=DynamicValidator(lambda: self.validator),
+            validate_while_typing=Condition(
+                lambda: is_true(self.validate_while_typing)
+            ),
             auto_suggest=DynamicAutoSuggest(lambda: self.auto_suggest),
             accept_handler=accept_handler,
             history=history,

src/prompt_toolkit/widgets/toolbars.py

@@ -9,10 +9,10 @@
     Condition,
     FilterOrBool,
     emacs_mode,
+    has_any_validation_error,
     has_arg,
     has_completions,
     has_focus,
-    has_validation_error,
     to_filter,
     vi_mode,
     vi_navigation_mode,
@@ -342,16 +342,19 @@ def __pt_container__(self) -> Container:
 
 
 class ValidationToolbar:
-    def __init__(self, show_position: bool = False) -> None:
+    def __init__(self, show_position: bool = False, buffer: Buffer | None = None) -> None:
         def get_formatted_text() -> StyleAndTextTuples:
-            buff = get_app().current_buffer
-
+            # If buffer not specified, use the currently focused buffer
+            if buffer is None:
+                buff = get_app().current_buffer
+            else:
+                buff = buffer
             if buff.validation_error:
-                row, column = buff.document.translate_index_to_position(
-                    buff.validation_error.cursor_position
-                )
-
                 if show_position:
+                    row, column = buff.document.translate_index_to_position(
+                        buff.validation_error.cursor_position
+                    )
+
                     text = "{} (line={} column={})".format(
                         buff.validation_error.message,
                         row + 1,
@@ -367,7 +370,7 @@ def get_formatted_text() -> StyleAndTextTuples:
         self.control = FormattedTextControl(get_formatted_text)
 
         self.container = ConditionalContainer(
-            content=Window(self.control, height=1), filter=has_validation_error
+            content=Window(self.control, height=1), filter=has_any_validation_error
         )
 
     def __pt_container__(self) -> Container: