Python prompt_toolkit.filters.Always() Examples

def _fix_unecessary_blank_lines(ps: PromptSession) -> None:
    """This is a fix for additional empty lines added by prompt toolkit.

    This assumes the layout of the default session doesn't change, if it
    does, this needs an update."""

    default_container = ps.layout.container

    default_buffer_window = (
        default_container.get_children()[0].content.get_children()[1].content
    )

    assert isinstance(default_buffer_window, Window)
    # this forces the main window to stay as small as possible, avoiding
    # empty lines in selections
    default_buffer_window.dont_extend_height = Always() 

def main():
    """ 
         Start the Slack Client 
    """
    os.system("clear; figlet 'Slack Gitsin' | lolcat")
    history = FileHistory(os.path.expanduser("~/.slackHistory"))
    while True:
        text = prompt("slack> ", history=history,
                      auto_suggest=AutoSuggestFromHistory(),
                      on_abort=AbortAction.RETRY,
                      style=DocumentStyle,
                      completer=Completer(fuzzy_match=False,
                                          text_utils=TextUtils()),
                      complete_while_typing=Always(),
                      get_bottom_toolbar_tokens=get_bottom_toolbar_tokens,
                      key_bindings_registry=manager.registry,
                      accept_action=AcceptAction.RETURN_DOCUMENT
        )
        slack = Slack(text)
        slack.run_command() 

def create_application(self, full_layout=True):
        """ makes the application object and the buffers """
        if full_layout:
            layout = create_layout(self.lexer, ExampleLexer, ToolbarLexer)
        else:
            layout = create_tutorial_layout(self.lexer)

        buffers = {
            DEFAULT_BUFFER: Buffer(is_multiline=True),
            'description': Buffer(is_multiline=True, read_only=True),
            'parameter' : Buffer(is_multiline=True, read_only=True),
            'examples' : Buffer(is_multiline=True, read_only=True),
            'bottom_toolbar' : Buffer(is_multiline=True),
            'example_line' : Buffer(is_multiline=True),
            'default_values' : Buffer(),
            'symbols' : Buffer()
        }

        writing_buffer = Buffer(
            history=self.history,
            auto_suggest=AutoSuggestFromHistory(),
            enable_history_search=True,
            completer=self.completer,
            complete_while_typing=Always()
        )

        return Application(
            mouse_support=False,
            style=self.styles,
            buffer=writing_buffer,
            on_input_timeout=self.on_input_timeout,
            key_bindings_registry=registry,
            layout=layout,
            buffers=buffers,
        ) 

def create_tutorial_layout(lex):
    """ layout for example tutorial """
    lexer, _, _ = get_lexers(lex, None, None)
    layout_full = HSplit([
        FloatContainer(
            Window(
                BufferControl(
                    input_processors=input_processors,
                    lexer=lexer,
                    preview_search=Always()),
                get_height=get_height),
            [
                Float(xcursor=True,
                      ycursor=True,
                      content=CompletionsMenu(
                          max_height=MAX_COMPLETION,
                          scroll_offset=1,
                          extra_filter=(HasFocus(DEFAULT_BUFFER))))]),
        ConditionalContainer(
            HSplit([
                get_hline(),
                get_param(lexer),
                get_hline(),
                Window(
                    content=BufferControl(
                        buffer_name='example_line',
                        lexer=lexer
                    ),
                ),
                Window(
                    TokenListControl(
                        get_tutorial_tokens,
                        default_char=Char(' ', Token.Toolbar)),
                    height=D.exact(1)),
            ]),
            filter=~IsDone() & RendererHeightIsKnown()
        )
    ])
    return layout_full 

def test_always():
    assert Always()() 

def test_invert():
    assert not (~Always())()
    assert ~Never()()

    c = ~Condition(lambda: False)
    assert c() 

def create_buffer(self, completer, history):
        return Buffer(
            history=history,
            auto_suggest=AutoSuggestFromHistory(),
            enable_history_search=True,
            completer=completer,
            complete_while_typing=Always(),
            accept_action=AcceptAction.RETURN_DOCUMENT) 

def __init__(self, get_tokens, filter=Always(), **kw):
        super(TokenListToolbar, self).__init__(
            content=Window(
                TokenListControl(get_tokens, **kw),
                height=LayoutDimension.exact(1)),
            filter=filter) 

def __init__(self, extra_filter=Always()):
        super(CompletionsToolbar, self).__init__(
            content=Window(
                CompletionsToolbarControl(),
                height=LayoutDimension.exact(1)),
            filter=HasCompletions() & ~IsDone() & extra_filter) 

def build_propmpt(self) -> pt_shortcuts.PromptSession:
        history = pt_history.FileHistory(
            os.path.expanduser('~/.edgedbhistory'))

        bindings = pt_key_binding.KeyBindings()
        handle = bindings.add

        @handle('f3')  # type: ignore
        def _mode_toggle(event: Any) -> None:
            self.context.toggle_query_mode()

        @handle('f4')  # type: ignore
        def _implicit_toggle(event: Any) -> None:
            self.context.toggle_implicit()

        @handle('f5')  # type: ignore
        def _introspect_toggle(event: Any) -> None:
            self.context.toggle_introspect_types()

            if self.context.introspect_types:
                self.ensure_connection()
                self.introspect_db(self.connection)
            else:
                self.context.typenames = None

        @handle('tab')  # type: ignore
        def _tab(event: Any) -> None:
            b = prompt.app.current_buffer
            before_cursor = b.document.current_line_before_cursor
            if b.text and (not before_cursor or before_cursor.isspace()):
                b.insert_text('    ')

        prompt = pt_shortcuts.PromptSession(
            lexer=pt_lexers.PygmentsLexer(eql_pygments.EdgeQLLexer),
            include_default_pygments_style=False,

            completer=pt_complete.DummyCompleter(),
            reserve_space_for_menu=6,

            message=self.get_prompt_tokens,
            prompt_continuation=self.get_continuation_tokens,
            bottom_toolbar=self.get_toolbar_tokens,
            multiline=is_multiline,
            history=history,
            complete_while_typing=pt_filters.Always(),
            key_bindings=bindings,
            style=self.style,
            editing_mode=pt_enums.EditingMode.VI,
            search_ignore_case=True,
        )

        return prompt