Method paint

bpython/curtsiesfrontend/repl.py:1543–1850

Returns an array of min_height or more rows and width columns, plus cursor position Paints the entire screen - ideally the terminal display layer will take a diff and only write to the screen in portions that have changed, but the idea is that we don't need to worry

(
        self,
        about_to_exit=False,
        user_quit=False,
        try_preserve_history_height=30,
        min_infobox_height=5,
    )

        return line_with_padding_len - len(full_line)

    def paint(
        self,
        about_to_exit=False,
        user_quit=False,
        try_preserve_history_height=30,
        min_infobox_height=5,
    ) -> tuple[FSArray, tuple[int, int]]:
        """Returns an array of min_height or more rows and width columns, plus
        cursor position

        Paints the entire screen - ideally the terminal display layer will take
        a diff and only write to the screen in portions that have changed, but
        the idea is that we don't need to worry about that here, instead every
        frame is completely redrawn because less state is cool!

        try_preserve_history_height is the the number of rows of content that
        must be visible before the suggestion box scrolls the terminal in order
        to display more than min_infobox_height rows of suggestions, docs etc.
        """
        # The hairiest function in the curtsies
        if about_to_exit:
            # exception to not changing state!
            self.clean_up_current_line_for_exit()

        width, min_height = self.width, self.height
        show_status_bar = (
            bool(self.status_bar.should_show_message)
            or self.status_bar.has_focus
        ) and not self.request_paint_to_pad_bottom
        if show_status_bar:
            # because we're going to tack the status bar on at the end, shoot
            # for an array one less than the height of the screen
            min_height -= 1

        current_line_start_row = len(self.lines_for_display) - max(
            0, self.scroll_offset
        )
        # TODO how is the situation of self.scroll_offset < 0 possible?
        # or show_status_bar and about_to_exit ?
        if self.request_paint_to_clear_screen:
            self.request_paint_to_clear_screen = False
            arr = FSArray(min_height + current_line_start_row, width)
        elif self.request_paint_to_pad_bottom:
            # min_height - 1 for startup banner with python version
            height = min(self.request_paint_to_pad_bottom, min_height - 1)
            arr = FSArray(height, width)
            self.request_paint_to_pad_bottom = 0
        else:
            arr = FSArray(0, width)
        # TODO test case of current line filling up the whole screen (there
        # aren't enough rows to show it)

        current_line = paint.paint_current_line(
            min_height, width, self.current_cursor_line
        )
        # needs to happen before we calculate contents of history because
        # calculating self.current_cursor_line has the side effect of
        # unhighlighting parens in buffer