Ejemplo n.º 1
0
    def _create_layout(self):
        """
        Create `Layout` for this prompt.
        """
        dyncond = self._dyncond

        # Create functions that will dynamically split the prompt. (If we have
        # a multiline prompt.)
        has_before_fragments, get_prompt_text_1, get_prompt_text_2 = \
            _split_multiline_prompt(self._get_prompt)

        default_buffer = self.default_buffer
        search_buffer = self.search_buffer

        # Create processors list.
        all_input_processors = [
            HighlightIncrementalSearchProcessor(),
            HighlightSelectionProcessor(),
            ConditionalProcessor(AppendAutoSuggestion(),
                                 has_focus(default_buffer) & ~is_done),
            ConditionalProcessor(PasswordProcessor(), dyncond('is_password')),
            DisplayMultipleCursors(),

            # Users can insert processors here.
            DynamicProcessor(
                lambda: merge_processors(self.input_processors or [])),

            # For single line mode, show the prompt before the input.
            ConditionalProcessor(
                merge_processors([
                    BeforeInput(get_prompt_text_2),
                    ShowArg(),
                ]), ~dyncond('multiline'))
        ]

        # Create bottom toolbars.
        bottom_toolbar = ConditionalContainer(
            Window(FormattedTextControl(lambda: self.bottom_toolbar,
                                        style='class:bottom-toolbar.text'),
                   style='class:bottom-toolbar',
                   dont_extend_height=True,
                   height=Dimension(min=1)),
            filter=~is_done & renderer_height_is_known
            & Condition(lambda: self.bottom_toolbar is not None))

        search_toolbar = SearchToolbar(
            search_buffer, ignore_case=dyncond('search_ignore_case'))

        search_buffer_control = SearchBufferControl(
            buffer=search_buffer,
            input_processors=[
                ReverseSearchProcessor(),
                ShowArg(),
            ],
            ignore_case=dyncond('search_ignore_case'))

        system_toolbar = SystemToolbar(
            enable_global_bindings=dyncond('enable_system_prompt'))

        def get_search_buffer_control():
            " Return the UIControl to be focused when searching start. "
            if _true(self.multiline):
                return search_toolbar.control
            else:
                return search_buffer_control

        default_buffer_control = BufferControl(
            buffer=default_buffer,
            search_buffer_control=get_search_buffer_control,
            input_processors=all_input_processors,
            include_default_input_processors=False,
            lexer=DynamicLexer(lambda: self.lexer),
            preview_search=True)

        default_buffer_window = Window(
            default_buffer_control,
            height=self._get_default_buffer_control_height,
            left_margins=[
                # In multiline mode, use the window margin to display
                # the prompt and continuation fragments.
                ConditionalMargin(
                    PromptMargin(get_prompt_text_2, self._get_continuation),
                    filter=dyncond('multiline'),
                )
            ],
            wrap_lines=dyncond('wrap_lines'))

        @Condition
        def multi_column_complete_style():
            return self.complete_style == CompleteStyle.MULTI_COLUMN

        # Build the layout.
        layout = HSplit([
            # The main input, with completion menus floating on top of it.
            FloatContainer(
                HSplit([
                    ConditionalContainer(
                        Window(FormattedTextControl(get_prompt_text_1),
                               dont_extend_height=True),
                        Condition(has_before_fragments)),
                    ConditionalContainer(
                        default_buffer_window,
                        Condition(lambda: get_app().layout.current_control !=
                                  search_buffer_control),
                    ),
                    ConditionalContainer(
                        Window(search_buffer_control),
                        Condition(lambda: get_app().layout.current_control ==
                                  search_buffer_control),
                    ),
                ]),
                [
                    # Completion menus.
                    Float(xcursor=True,
                          ycursor=True,
                          content=CompletionsMenu(
                              max_height=16,
                              scroll_offset=1,
                              extra_filter=has_focus(default_buffer)
                              & ~multi_column_complete_style)),
                    Float(xcursor=True,
                          ycursor=True,
                          content=MultiColumnCompletionsMenu(
                              show_meta=True,
                              extra_filter=has_focus(default_buffer)
                              & multi_column_complete_style)),
                    # The right prompt.
                    Float(right=0,
                          top=0,
                          hide_when_covering_content=True,
                          content=_RPrompt(lambda: self.rprompt)),
                ]),
            ConditionalContainer(ValidationToolbar(), filter=~is_done),
            ConditionalContainer(system_toolbar,
                                 dyncond('enable_system_prompt') & ~is_done),

            # In multiline mode, we use two toolbars for 'arg' and 'search'.
            ConditionalContainer(
                Window(FormattedTextControl(self._get_arg_text), height=1),
                dyncond('multiline') & has_arg),
            ConditionalContainer(search_toolbar,
                                 dyncond('multiline') & ~is_done),
            bottom_toolbar,
        ])

        return Layout(layout, default_buffer_window)
Ejemplo n.º 2
0
    def create_layout(self):
        # Create functions that will dynamically split the prompt. (If we have
        # a multiline prompt.)
        has_before_fragments, get_prompt_text_1, get_prompt_text_2 = \
            _split_multiline_prompt(self.formatted_message)

        default_buffer = ModalBuffer(
            name=DEFAULT_BUFFER,
            complete_while_typing=Condition(
                lambda: self.complete_while_typing),
            completer=DynamicCompleter(lambda: self.completer),
            history=self.history,
            get_tempfile_suffix=lambda: self.tempfile_suffix)

        search_buffer = Buffer(name=SEARCH_BUFFER)

        search_toolbar = SearchToolbar(search_buffer)

        input_processor = merge_processors([
            ConditionalProcessor(HighlightSearchProcessor(preview_search=True),
                                 has_focus(search_buffer)),
            HighlightSelectionProcessor(),
            HighlightMatchingBracketProcessor(),
            DisplayMultipleCursors()
        ])

        default_buffer_control = BufferControl(
            buffer=default_buffer,
            search_buffer_control=search_toolbar.control,
            input_processor=input_processor,
            lexer=DynamicLexer(lambda: self.lexer),
            preview_search=True)

        def get_default_buffer_control_height():
            # If there is an autocompletion menu to be shown, make sure that our
            # layout has at least a minimal height in order to display it.
            space = self.reserve_space_for_menu

            if space and not get_app().is_done:
                buff = default_buffer
                if buff.complete_while_typing(
                ) or buff.complete_state is not None:
                    return Dimension(min=space)
            return Dimension()

        def get_continuation(width):
            prompt_continuation = self.prompt_continuation

            if callable(prompt_continuation):
                prompt_continuation = prompt_continuation(width)

            return to_formatted_text(prompt_continuation,
                                     style='class:prompt-continuation')

        default_buffer_window = Window(
            default_buffer_control,
            height=get_default_buffer_control_height,
            left_margins=[PromptMargin(get_prompt_text_2, get_continuation)],
            wrap_lines=True)

        def get_arg_text():
            arg = self.app.key_processor.arg
            if arg == '-':
                arg = '-1'

            return [('class:arg-toolbar', 'Repeat: '),
                    ('class:arg-toolbar.text', arg)]

        # Build the layout.
        layout = HSplit([
            # The main input, with completion menus floating on top of it.
            FloatContainer(
                HSplit([
                    ConditionalContainer(
                        Window(FormattedTextControl(get_prompt_text_1),
                               dont_extend_height=True),
                        Condition(has_before_fragments)),
                    default_buffer_window,
                ]),
                [
                    # Completion menus.
                    Float(xcursor=True,
                          ycursor=True,
                          content=MultiColumnCompletionsMenu(
                              show_meta=True,
                              extra_filter=has_focus(default_buffer)))
                ]),
            ConditionalContainer(
                Window(FormattedTextControl(get_arg_text), height=1), has_arg),
            search_toolbar
        ])

        return Layout(layout, default_buffer_window)
Ejemplo n.º 3
0
    def _create_layout(self,
                       message='',
                       lexer=None,
                       is_password=False,
                       reserve_space_for_menu=8,
                       get_prompt_tokens=None,
                       get_continuation_tokens=None,
                       get_rprompt_tokens=None,
                       get_bottom_toolbar_tokens=None,
                       get_url_tokens=None,
                       display_completions_in_columns=False,
                       extra_input_processors=None,
                       multiline=False,
                       wrap_lines=True):
        """
        Create a :class:`.Container` instance for a prompt.
        :param message: Text to be used as prompt.
        :param lexer: :class:`~prompt_toolkit.layout.lexers.Lexer` to be used for
            the highlighting.
        :param is_password: `bool` or :class:`~prompt_toolkit.filters.CLIFilter`.
            When True, display input as '*'.
        :param reserve_space_for_menu: Space to be reserved for the menu. When >0,
            make sure that a minimal height is allocated in the terminal, in order
            to display the completion menu.
        :param get_prompt_tokens: An optional callable that returns the tokens to be
            shown in the menu. (To be used instead of a `message`.)
        :param get_continuation_tokens: An optional callable that takes a
            CommandLineInterface and width as input and returns a list of (Token,
            text) tuples to be used for the continuation.
        :param get_bottom_toolbar_tokens: An optional callable that returns the
            tokens for a toolbar at the bottom.
        :param display_completions_in_columns: `bool` or
            :class:`~prompt_toolkit.filters.CLIFilter`. Display the completions in
            multiple columns.
        :param multiline: `bool` or :class:`~prompt_toolkit.filters.CLIFilter`.
            When True, prefer a layout that is more adapted for multiline input.
            Text after newlines is automatically indented, and search/arg input is
            shown below the input, instead of replacing the prompt.
        :param wrap_lines: `bool` or :class:`~prompt_toolkit.filters.CLIFilter`.
            When True (the default), automatically wrap long lines instead of
            scrolling horizontally.
        """
        assert get_bottom_toolbar_tokens is None or callable(
            get_bottom_toolbar_tokens)
        assert get_prompt_tokens is None or callable(get_prompt_tokens)
        assert get_rprompt_tokens is None or callable(get_rprompt_tokens)
        assert not (message and get_prompt_tokens)

        display_completions_in_columns = to_cli_filter(
            display_completions_in_columns)
        multiline = to_cli_filter(multiline)

        if get_prompt_tokens is None:
            get_prompt_tokens = lambda _: [(Token.Prompt, message)]

        has_before_tokens, get_prompt_tokens_1, get_prompt_tokens_2 = \
            _split_multiline_prompt(get_prompt_tokens)

        # `lexer` is supposed to be a `Lexer` instance. But if a Pygments lexer
        # class is given, turn it into a PygmentsLexer. (Important for
        # backwards-compatibility.)
        try:
            if pygments_Lexer and issubclass(lexer, pygments_Lexer):
                lexer = PygmentsLexer(lexer, sync_from_start=True)
        except TypeError:  # Happens when lexer is `None` or an instance of something else.
            pass

        # Create processors list.
        input_processors = [
            ConditionalProcessor(
                # By default, only highlight search when the search
                # input has the focus. (Note that this doesn't mean
                # there is no search: the Vi 'n' binding for instance
                # still allows to jump to the next match in
                # navigation mode.)
                HighlightSearchProcessor(preview_search=True),
                HasFocus(SEARCH_BUFFER)),
            HighlightSelectionProcessor(),
            ConditionalProcessor(AppendAutoSuggestion(),
                                 HasFocus(DEFAULT_BUFFER) & ~IsDone()),
            ConditionalProcessor(PasswordProcessor(), is_password),
            DisplayMultipleCursors(DEFAULT_BUFFER),
        ]

        if extra_input_processors:
            input_processors.extend(extra_input_processors)

        # Show the prompt before the input (using the DefaultPrompt processor.
        # This also replaces it with reverse-i-search and 'arg' when required.
        # (Only for single line mode.)
        # (DefaultPrompt should always be at the end of the processors.)
        input_processors.append(
            ConditionalProcessor(DefaultPrompt(get_prompt_tokens_2),
                                 ~multiline))

        # Create bottom toolbar.
        if get_bottom_toolbar_tokens:
            toolbars = [
                ConditionalContainer(VSplit([
                    Window(TokenListControl(get_url_tokens,
                                            default_char=Char(
                                                ' ', Token.Toolbar)),
                           height=LayoutDimension.exact(1)),
                    Window(TokenListControl(get_bottom_toolbar_tokens,
                                            default_char=Char(
                                                ' ', Token.Toolbar),
                                            align_right=True),
                           height=LayoutDimension.exact(1))
                ]),
                                     filter=~IsDone()
                                     & RendererHeightIsKnown())
            ]
        else:
            toolbars = []

        def get_height(cli):
            # If there is an autocompletion menu to be shown, make sure that our
            # layout has at least a minimal height in order to display it.
            if reserve_space_for_menu and not cli.is_done:
                buff = cli.current_buffer

                # Reserve the space, either when there are completions, or when
                # `complete_while_typing` is true and we expect completions very
                # soon.
                if buff.complete_while_typing(
                ) or buff.complete_state is not None:
                    return LayoutDimension(min=reserve_space_for_menu)

            return LayoutDimension()

        # Create and return Container instance.
        return HSplit([
            # The main input, with completion menus floating on top of it.
            FloatContainer(
                HSplit([
                    ConditionalContainer(
                        Window(TokenListControl(get_prompt_tokens_1),
                               dont_extend_height=True),
                        Condition(has_before_tokens)),
                    Window(
                        BufferControl(
                            input_processors=input_processors,
                            lexer=lexer,
                            # Enable preview_search, we want to have immediate feedback
                            # in reverse-i-search mode.
                            preview_search=True),
                        get_height=get_height,
                        left_margins=[
                            # In multiline mode, use the window margin to display
                            # the prompt and continuation tokens.
                            ConditionalMargin(PromptMargin(
                                get_prompt_tokens_2, get_continuation_tokens),
                                              filter=multiline)
                        ],
                        wrap_lines=wrap_lines,
                    ),
                ]),
                [
                    # Completion menus.
                    Float(xcursor=True,
                          ycursor=True,
                          content=CompletionsMenu(
                              max_height=16,
                              scroll_offset=1,
                              extra_filter=HasFocus(DEFAULT_BUFFER)
                              & ~display_completions_in_columns)),
                    Float(xcursor=True,
                          ycursor=True,
                          content=MultiColumnCompletionsMenu(
                              extra_filter=HasFocus(DEFAULT_BUFFER)
                              & display_completions_in_columns,
                              show_meta=True)),

                    # The right prompt.
                    Float(right=0,
                          top=0,
                          hide_when_covering_content=True,
                          content=_RPrompt(get_rprompt_tokens)),
                ]),
            ValidationToolbar(),
            SystemToolbar(),

            # In multiline mode, we use two toolbars for 'arg' and 'search'.
            ConditionalContainer(ArgToolbar(), multiline),
            ConditionalContainer(SearchToolbar(), multiline),
        ] + toolbars)
Ejemplo n.º 4
0
def create_layout(message='',
                  lexer=None,
                  reserve_space_for_menu=8,
                  get_prompt_tokens=None,
                  get_bottom_toolbar_tokens=None,
                  extra_input_processors=None,
                  multiline=False,
                  wrap_lines=True):

    # Create processors list.
    input_processors = [
        ConditionalProcessor(
            # Highlight the reverse-i-search buffer
            HighlightSearchProcessor(preview_search=True),
            HasFocus(SEARCH_BUFFER)),
    ]

    if extra_input_processors:
        input_processors.extend(extra_input_processors)

    lexer = PygmentsLexer(lexer, sync_from_start=True)
    multiline = to_cli_filter(multiline)

    sidebar_token = [(Token.Toolbar.Status.Key, "[ctrl+d]"),
                     (Token.Toolbar.Status, " Exit")]
    sidebar_width = token_list_width(sidebar_token)

    get_prompt_tokens = lambda _: [(Token.Prompt, message)]
    get_sidebar_tokens = lambda _: sidebar_token

    def get_height(cli):
        # If there is an autocompletion menu to be shown, make sure that our
        # layout has at least a minimal height in order to display it.
        if reserve_space_for_menu and not cli.is_done:
            buff = cli.current_buffer

            # Reserve the space, either when there are completions, or when
            # `complete_while_typing` is true and we expect completions very
            # soon.
            if buff.complete_while_typing() or buff.complete_state is not None:
                return LayoutDimension(min=reserve_space_for_menu)

        return LayoutDimension()

    # Create and return Container instance.
    return HSplit([
        VSplit([
            HSplit([
                # The main input, with completion menus floating on top of it.
                FloatContainer(
                    HSplit([
                        Window(
                            BufferControl(
                                input_processors=input_processors,
                                lexer=lexer,
                                # enable preview search for reverse-i-search
                                preview_search=True),
                            get_height=get_height,
                            wrap_lines=wrap_lines,
                            left_margins=[
                                # In multiline mode, use the window margin to display
                                # the prompt and continuation tokens.
                                ConditionalMargin(PromptMargin(
                                    get_prompt_tokens),
                                                  filter=multiline)
                            ],
                        ),
                    ]),
                    [
                        # Completion menu
                        Float(xcursor=True,
                              ycursor=True,
                              content=CompletionsMenu(max_height=16,
                                                      scroll_offset=1,
                                                      extra_filter=HasFocus(
                                                          DEFAULT_BUFFER))),
                    ]),

                # reverse-i-search toolbar (ctrl+r)
                ConditionalContainer(SearchToolbar(), multiline),
            ])
        ]),
    ] + [
        VSplit([
            # Left-Aligned Session Toolbar
            ConditionalContainer(Window(TokenListControl(
                get_bottom_toolbar_tokens),
                                        height=LayoutDimension.exact(1)),
                                 filter=~IsDone() & RendererHeightIsKnown()),

            # Right-Aligned Container
            ConditionalContainer(Window(TokenListControl(get_sidebar_tokens),
                                        height=LayoutDimension.exact(1),
                                        width=LayoutDimension.exact(
                                            sidebar_width)),
                                 filter=~IsDone() & RendererHeightIsKnown())
        ])
    ])
Ejemplo n.º 5
0
def create_layout(buffer,
                  lexer=None,
                  reserve_space_for_menu=8,
                  get_prompt_tokens=None,
                  get_bottom_toolbar_tokens=None,
                  extra_input_processors=None,
                  multiline=False,
                  wrap_lines=True):
    """
    Creates a custom `Layout` for the Crash input REPL

    This layout includes:
        * a bottom left-aligned session toolbar container
        * a bottom right-aligned side-bar container

    +-------------------------------------------+
    | cr> select 1;                             |
    |                                           |
    |                                           |
    +-------------------------------------------+
    | bottom_toolbar_tokens      sidebar_tokens |
    +-------------------------------------------+
    """

    input_processors = [
        ConditionalProcessor(
            # Highlight the reverse-i-search buffer
            HighlightSearchProcessor(),
            has_focus(SEARCH_BUFFER)),
    ] + (extra_input_processors or [])
    lexer = PygmentsLexer(lexer, sync_from_start=True)
    sidebar_token = [
        ('class:status-toolbar', "[ctrl+d]"),
        ('class:status-toolbar.text', " Exit")
    ]

    def _get_buffer_control_height(buf):
        # If there is an autocompletion menu to be shown, make sure that our
        # layout has at least a minimal height in order to display it.
        if reserve_space_for_menu and not get_app().is_done:
            buff = buffer
            # Reserve the space, either when there are completions, or when
            # `complete_while_typing` is true and we expect completions very
            # soon.
            if buff.complete_while_typing() or buff.complete_state is not None:
                return Dimension(min=reserve_space_for_menu)

        return Dimension()

    search_toolbar = SearchToolbar()
    buf_ctrl_window = Window(
        BufferControl(
            buffer=buffer,
            search_buffer_control=search_toolbar.control,
            input_processors=input_processors,
            lexer=lexer,
            preview_search=True
        ),
        height=lambda: _get_buffer_control_height(buffer),
        wrap_lines=wrap_lines,
        left_margins=[
            ConditionalMargin(
                PromptMargin(get_prompt_tokens),
                filter=multiline
            )
        ]
    )
    in_out_area = VSplit([
        HSplit([
            FloatContainer(
                HSplit([buf_ctrl_window]),
                [
                    Float(
                        xcursor=True,
                        ycursor=True,
                        content=CompletionsMenu(
                            max_height=16,
                            scroll_offset=1,
                            extra_filter=has_focus(DEFAULT_BUFFER)
                        )
                    ),
                ]
            ),
            # reverse-i-search toolbar (ctrl+r)
            search_toolbar,
        ])
    ])
    bottom_toolbar = VSplit([
        ConditionalContainer(
            Window(
                FormattedTextControl(get_bottom_toolbar_tokens),
                height=Dimension.exact(1)
            ),
            filter=~is_done & renderer_height_is_known
        ),
        ConditionalContainer(
            Window(
                FormattedTextControl(lambda: sidebar_token),
                height=Dimension.exact(1),
                align=WindowAlign.RIGHT
            ),
            filter=~is_done & renderer_height_is_known
        )
    ])
    return Layout(HSplit([in_out_area, bottom_toolbar]))
Ejemplo n.º 6
0
    def _create_application(self, editing_mode, erase_when_done):
        def dyncond(attr_name):
            """
            Dynamically take this setting from this 'Prompt' class.
            `attr_name` represents an attribute name of this class. Its value
            can either be a boolean or a `Filter`.

            This returns something that can be used as either a `Filter`
            or `Filter`.
            """
            @Condition
            def dynamic():
                value = getattr(self, attr_name)
                return to_filter(value)()

            return dynamic

        # Create functions that will dynamically split the prompt. (If we have
        # a multiline prompt.)
        has_before_fragments, get_prompt_text_1, get_prompt_text_2 = \
            _split_multiline_prompt(self._get_prompt)

        # Create buffers list.
        def accept(buff):
            """ Accept the content of the default buffer. This is called when
            the validation succeeds. """
            self.app.set_result(buff.document.text)

            # Reset content before running again.
            self.app.pre_run_callables.append(buff.reset)

        default_buffer = Buffer(
            name=DEFAULT_BUFFER,
            # Make sure that complete_while_typing is disabled when
            # enable_history_search is enabled. (First convert to Filter,
            # to avoid doing bitwise operations on bool objects.)
            complete_while_typing=Condition(
                lambda: _true(self.complete_while_typing) and not _true(
                    self.enable_history_search) and not self.complete_style ==
                CompleteStyle.READLINE_LIKE),
            validate_while_typing=dyncond('validate_while_typing'),
            enable_history_search=dyncond('enable_history_search'),
            validator=DynamicValidator(lambda: self.validator),
            completer=ThreadedCompleter(
                completer=DynamicCompleter(lambda: self.completer),
                in_thread=dyncond('complete_in_thread'),
            ),
            history=DynamicHistory(lambda: self.history),
            auto_suggest=DynamicAutoSuggest(lambda: self.auto_suggest),
            accept_handler=accept,
            get_tempfile_suffix=lambda: self.tempfile_suffix)

        search_buffer = Buffer(name=SEARCH_BUFFER)

        # Create processors list.
        input_processor = merge_processors([
            ConditionalProcessor(
                # By default, only highlight search when the search
                # input has the focus. (Note that this doesn't mean
                # there is no search: the Vi 'n' binding for instance
                # still allows to jump to the next match in
                # navigation mode.)
                HighlightSearchProcessor(preview_search=True),
                has_focus(search_buffer)),
            HighlightSelectionProcessor(),
            ConditionalProcessor(AppendAutoSuggestion(),
                                 has_focus(default_buffer) & ~is_done),
            ConditionalProcessor(PasswordProcessor(), dyncond('is_password')),
            DisplayMultipleCursors(),

            # Users can insert processors here.
            DynamicProcessor(lambda: self.extra_input_processor),

            # For single line mode, show the prompt before the input.
            ConditionalProcessor(
                merge_processors([
                    BeforeInput(get_prompt_text_2),
                    ShowArg(),
                ]), ~dyncond('multiline'))
        ])

        # Create bottom toolbars.
        bottom_toolbar = ConditionalContainer(
            Window(FormattedTextControl(lambda: self.bottom_toolbar,
                                        style='class:bottom-toolbar.text'),
                   style='class:bottom-toolbar',
                   dont_extend_height=True,
                   height=Dimension(min=1)),
            filter=~is_done & renderer_height_is_known
            & Condition(lambda: self.bottom_toolbar is not None))

        search_toolbar = SearchToolbar(
            search_buffer,
            get_search_state=lambda: default_buffer_control.get_search_state())
        search_buffer_control = BufferControl(buffer=search_buffer,
                                              input_processor=merge_processors(
                                                  [
                                                      ReverseSearchProcessor(),
                                                      ShowArg(),
                                                  ]))

        system_toolbar = SystemToolbar()

        def get_search_buffer_control():
            " Return the UIControl to be focused when searching start. "
            if _true(self.multiline):
                return search_toolbar.control
            else:
                return search_buffer_control

        default_buffer_control = BufferControl(
            buffer=default_buffer,
            get_search_buffer_control=get_search_buffer_control,
            input_processor=input_processor,
            lexer=DynamicLexer(lambda: self.lexer),
            preview_search=True)

        default_buffer_window = Window(
            default_buffer_control,
            height=self._get_default_buffer_control_height,
            left_margins=[
                # In multiline mode, use the window margin to display
                # the prompt and continuation fragments.
                ConditionalMargin(
                    PromptMargin(get_prompt_text_2, self._get_continuation),
                    filter=dyncond('multiline'),
                )
            ],
            wrap_lines=dyncond('wrap_lines'))

        @Condition
        def multi_column_complete_style():
            return self.complete_style == CompleteStyle.MULTI_COLUMN

        # Build the layout.
        layout = HSplit([
            # The main input, with completion menus floating on top of it.
            FloatContainer(
                HSplit([
                    ConditionalContainer(
                        Window(FormattedTextControl(get_prompt_text_1),
                               dont_extend_height=True),
                        Condition(has_before_fragments)),
                    ConditionalContainer(
                        default_buffer_window,
                        Condition(lambda: get_app().layout.current_control !=
                                  search_buffer_control),
                    ),
                    ConditionalContainer(
                        Window(search_buffer_control),
                        Condition(lambda: get_app().layout.current_control ==
                                  search_buffer_control),
                    ),
                ]),
                [
                    # Completion menus.
                    Float(xcursor=True,
                          ycursor=True,
                          content=CompletionsMenu(
                              max_height=16,
                              scroll_offset=1,
                              extra_filter=has_focus(default_buffer)
                              & ~multi_column_complete_style)),
                    Float(xcursor=True,
                          ycursor=True,
                          content=MultiColumnCompletionsMenu(
                              show_meta=True,
                              extra_filter=has_focus(default_buffer)
                              & multi_column_complete_style)),
                    # The right prompt.
                    Float(right=0,
                          top=0,
                          hide_when_covering_content=True,
                          content=_RPrompt(lambda: self.rprompt)),
                ]),
            ConditionalContainer(ValidationToolbar(), filter=~is_done),
            ConditionalContainer(system_toolbar,
                                 dyncond('enable_system_prompt') & ~is_done),

            # In multiline mode, we use two toolbars for 'arg' and 'search'.
            ConditionalContainer(
                Window(FormattedTextControl(self._get_arg_text), height=1),
                dyncond('multiline') & has_arg),
            ConditionalContainer(search_toolbar,
                                 dyncond('multiline') & ~is_done),
            bottom_toolbar,
        ])

        # Default key bindings.
        auto_suggest_bindings = load_auto_suggest_bindings()
        open_in_editor_bindings = load_open_in_editor_bindings()
        prompt_bindings = self._create_prompt_bindings()

        # Create application
        application = Application(
            layout=Layout(layout, default_buffer_window),
            style=DynamicStyle(lambda: self.style),
            include_default_pygments_style=dyncond(
                'include_default_pygments_style'),
            clipboard=DynamicClipboard(lambda: self.clipboard),
            key_bindings=merge_key_bindings([
                merge_key_bindings([
                    auto_suggest_bindings,
                    ConditionalKeyBindings(
                        open_in_editor_bindings,
                        dyncond('enable_open_in_editor')
                        & has_focus(DEFAULT_BUFFER)), prompt_bindings
                ]),
                ConditionalKeyBindings(
                    system_toolbar.get_global_key_bindings(),
                    dyncond('enable_system_prompt')),
                DynamicKeyBindings(lambda: self.extra_key_bindings),
            ]),
            mouse_support=dyncond('mouse_support'),
            editing_mode=editing_mode,
            erase_when_done=erase_when_done,
            reverse_vi_search_direction=True,

            # I/O.
            input=self.input,
            output=self.output)

        # During render time, make sure that we focus the right search control
        # (if we are searching). - This could be useful if people make the
        # 'multiline' property dynamic.
        '''
        def on_render(app):
            multiline = _true(self.multiline)
            current_control = app.layout.current_control

            if multiline:
                if current_control == search_buffer_control:
                    app.layout.current_control = search_toolbar.control
                    app.invalidate()
            else:
                if current_control == search_toolbar.control:
                    app.layout.current_control = search_buffer_control
                    app.invalidate()

        app.on_render += on_render
        '''

        return application, default_buffer, default_buffer_control