U
    ouf@K                     @  s   d dl mZ d dlmZ d dlmZmZ d dlmZ d dl	m
Z
 ddlmZmZ ddlmZmZmZmZ dd	lmZmZ dd
lmZmZmZ dgZdZG dd deZdS )    )annotations)Point)FilterOrBool	to_filter)KeyBindingsBase)
MouseEvent   )	ContainerScrollOffsets)AnyDimension	Dimensionsum_layout_dimensionsto_dimension)MouseHandlerMouseHandlers)CharScreenWritePositionScrollablePanei'  c                   @  sH  e Zd ZdZdddeddddddf
ddddd	d
d
ddddddddZddddZddddZd	ddddZd	d	ddddZ	dddddd dd!d"d#Z
d$dd$d%d&d'Zdddd	dd(d)d*Zdddd	dd+d,d-Zddddd.d/d0Zddd1d2Zd3dd4d5Zd6dd7d8Zd	d	dd9dd:d;d<Zdd	ddd=d>d?ZdS )@r   aK  
    Container widget that exposes a larger virtual screen to its content and
    displays it in a vertical scrollbale region.

    Typically this is wrapped in a large `HSplit` container. Make sure in that
    case to not specify a `height` dimension of the `HSplit`, so that it will
    scale according to the content.

    .. note::

        If you want to display a completion menu for widgets in this
        `ScrollablePane`, then it's still a good practice to use a
        `FloatContainer` with a `CompletionsMenu` in a `Float` at the top-level
        of the layout hierarchy, rather then nesting a `FloatContainer` in this
        `ScrollablePane`. (Otherwise, it's possible that the completion menu
        is clipped.)

    :param content: The content container.
    :param scrolloffset: Try to keep the cursor within this distance from the
        top/bottom (left/right offset is not used).
    :param keep_cursor_visible: When `True`, automatically scroll the pane so
        that the cursor (of the focused window) is always visible.
    :param keep_focused_window_visible: When `True`, automatically scroll the
        pane so that the focused window is visible, or as much visible as
        possible if it doesn't completely fit the screen.
    :param max_available_height: Always constraint the height to this amount
        for performance reasons.
    :param width: When given, use this width instead of looking at the children.
    :param height: When given, use this height instead of looking at the children.
    :param show_scrollbar: When `True` display a scrollbar on the right.
    NT^vr	   zScrollOffsets | Noner   intr   strNone)contentscroll_offsetskeep_cursor_visiblekeep_focused_window_visiblemax_available_heightwidthheightshow_scrollbardisplay_arrowsup_arrow_symboldown_arrow_symbolreturnc                 C  sh   || _ |ptddd| _t|| _t|| _|| _|| _|| _t|| _	t|	| _
|
| _|| _d| _d S )Nr   )topbottomr   )r   r
   r   r   r   r   r   r   r    r!   r"   r#   r$   vertical_scroll)selfr   r   r   r   r   r   r    r!   r"   r#   r$    r*   I/tmp/pip-unpacked-wheel-8milen2s/prompt_toolkit/layout/scrollable_pane.py__init__4   s    



zScrollablePane.__init__)r%   c                 C  s   d| j dS )NzScrollablePane()r   r)   r*   r*   r+   __repr__P   s    zScrollablePane.__repr__c                 C  s   | j   d S N)r   resetr/   r*   r*   r+   r2   S   s    zScrollablePane.resetr   )max_available_widthr%   c                 C  s>   | j d k	rt| j S | j|}|  r:ttd|gS |S )Nr   )r   r   r   preferred_widthr!   r   r   exact)r)   r3   Zcontent_widthr*   r*   r+   r4   V   s    

zScrollablePane.preferred_width)r   r   r%   c                 C  sB   | j d k	rt| j S |  r$|d8 }| j|| j}td|jdS )Nr   r   )min	preferred)r    r   r!   r   preferred_heightr   r   r7   )r)   r   r   	dimensionr*   r*   r+   r8   d   s    

zScrollablePane.preferred_heightr   r   r   boolz
int | None)screenmouse_handlerswrite_positionparent_styleerase_bgz_indexr%   c                 C  s4  |   }|r|jd }n|j}| j|| jj}	t|	|j}	t|	| j}	t	t
d|dd}
|j|
_tdd||	d}t }| j|
||||| |
  ddlm} | jj}z|
j| }W n tk
r   Y nX | |j|	||
j| | ||
|| | |||| |j}|j}t|j|| |_t|j||j |_| ||
| |
jrXd|_|
j D ]v\}}d|j  kr|jk rbn nL| j |j!  kr|j| j  k rbn n$t"|j| |j!| | j  d	|j|< qb|
j# D ]6\}}| $t"|j| |j!| | j  d	||j#|< q|r0| %||	| d
S )z
        Render scrollable pane content.

        This works by rendering on an off-screen canvas, and copying over the
        visible region.
        r    )charstyle)Zdefault_charr   )xposyposr   r    )get_appTxyN)&r!   r   r   r8   r   r7   maxr    r6   r   r   Zshow_cursorr   r   write_to_screenZdraw_all_floatsZprompt_toolkit.applicationrF   ZlayoutZcurrent_window"visible_windows_to_write_positionsKeyError_make_window_visibleZcursor_positionsget_copy_over_screen_copy_over_mouse_handlersrE   rD   _copy_over_write_positionsitemsrH   r(   rI   r   Zmenu_positions_clip_point_to_visible_area_draw_scrollbar)r)   r;   r<   r=   r>   r?   r@   r!   virtual_widthvirtual_heighttemp_screenZtemp_write_positiontemp_mouse_handlersrF   Zfocused_windowvisible_win_write_posrE   rD   Zwindowpointr*   r*   r+   rK   s   s        

    


 zScrollablePane.write_to_screenr   )r[   r=   r%   c                 C  s   |j |jk r|j|jd}|j|jk r4|j|jd}|j |j|j kr^|j|j|j d d}|j|j|j kr|j|j|j d d}|S )zV
        Ensure that the cursor and menu positions always are always reported
        )rH   )rI   r   )rH   rD   _replacerI   rE   r   r    )r)   r[   r=   r*   r*   r+   rT      s    z*ScrollablePane._clip_point_to_visible_area)r;   rX   r=   rV   r%   c                 C  s   |j }|j}t|jD ]v}|j|| j  }|j||  }	|j|| j  }
|j||  }t|D ],}|| |	|| < ||
kr^|
| ||| < q^qdS )zU
        Copy over visible screen content and "zero width escape sequences".
        N)rE   rD   ranger    data_bufferr(   zero_width_escapes)r)   r;   rX   r=   rV   rE   rD   rI   Ztemp_rowrowZtemp_zero_width_escapesr_   rH   r*   r*   r+   rP      s    
z ScrollablePane._copy_over_screen)r<   rY   r=   rV   r%   c                   s   |j |ji  ddd fdd}|j}|j}t|jD ]P}||kr@||j  }	||  }
t|D ] }||	krn||	| |
| < qnq@dS )z
        Copy over mouse handlers from virtual screen to real screen.

        Note: we take `virtual_width` because we don't want to copy over mouse
              handlers that we possibly have behind the scrollbar.
        r   )handlerr%   c                   s2    kr*ddd fdd}| <   S )z:Wrap mouse handler. Translate coordinates in `MouseEvent`.r   r   )eventr%   c                   s@   t t| jj | jjj  d| j| j| jd} | d S )NrG   )position
event_typebutton	modifiers)	r   r   rc   rH   rI   r(   rd   re   rf   )rb   Z	new_event)ra   r)   rD   rE   r*   r+   new_handler.  s    
	zYScrollablePane._copy_over_mouse_handlers.<locals>.wrap_mouse_handler.<locals>.new_handlerr*   )ra   rg   Zmouse_handler_wrappersr)   rD   rE   )ra   r+   wrap_mouse_handler*  s    zDScrollablePane._copy_over_mouse_handlers.<locals>.wrap_mouse_handlerN)rE   rD   r<   r]   r    r(   )r)   r<   rY   r=   rV   ri   Zmouse_handlers_dictZtemp_mouse_handlers_dictrI   Ztemp_mouse_rowZ	mouse_rowrH   r*   rh   r+   rQ     s    z(ScrollablePane._copy_over_mouse_handlers)r;   rX   r=   r%   c                 C  sP   |j }|j}|j D ]4\}}t|j| |j | | j |j|jd|j|< qdS )z3
        Copy over window write positions.
        )rD   rE   r    r   N)rE   rD   rL   rS   r   r(   r    r   )r)   r;   rX   r=   rE   rD   winZ	write_posr*   r*   r+   rR   I  s    z)ScrollablePane._copy_over_write_positionsc                 C  s
   | j  S r1   )r   is_modalr/   r*   r*   r+   rk   \  s    zScrollablePane.is_modalzKeyBindingsBase | Nonec                 C  s
   | j  S r1   )r   get_key_bindingsr/   r*   r*   r+   rl   _  s    zScrollablePane.get_key_bindingszlist[Container]c                 C  s   | j gS r1   r.   r/   r*   r*   r+   get_childrenb  s    zScrollablePane.get_childrenzPoint | None)visible_heightrW   rZ   cursor_positionr%   c                 C  s   d}|| }|   r\|dk	r\| j}|j| d |j }|j|j }	t||}tdt||	}|  r|j|kr|j	|j | }
|j	}n|j	}
|j	|j | }t||
}t||}||kr|}| j
|kr|| _
| j
|k r|| _
dS )a  
        Scroll the scrollable pane, so that this window becomes visible.

        :param visible_height: Height of this `ScrollablePane` that is rendered.
        :param virtual_height: Height of the virtual, temp screen.
        :param visible_win_write_pos: `WritePosition` of the nested window on the
            temp screen.
        :param cursor_position: The location of the cursor position of this
            window on the temp screen.
        r   Nr   )r   r   rI   r'   r&   rJ   r6   r   r    rE   r(   )r)   rn   rW   rZ   ro   Z
min_scrollZ
max_scrolloffsetsZcpos_min_scrollZcpos_max_scrollZwindow_min_scrollZwindow_max_scrollr*   r*   r+   rN   e  sD    





z#ScrollablePane._make_window_visible)r=   content_heightr;   r%   c                   s^  |j }|  }|r|d8 }zD|j t| }| jt| }tt|td||  t|| W n tk
rt   Y dS X ddd fdd}|j|j	 d }	|j
}
|j}|rt| jd	||
 |	< |
d7 }
d
}d}d}d}t|D ]^}d}||r||d s|}n|}n||d r |}n|}td|||
 |	< |
d7 }
q|rZt| jd	||
 |	< dS )z
        Draw the scrollbar on the screen.

        Note: There is some code duplication with the `ScrollbarMargin`
              implementation.
           r   Nr   r:   )r`   r%   c                   s   |   ko  kS   S )z/True if we should display a button on this row.r*   )r`   Zscrollbar_heightZscrollbar_topr*   r+   is_scroll_button  s    z8ScrollablePane._draw_scrollbar.<locals>.is_scroll_buttonzclass:scrollbar.arrowzclass:scrollbar.backgroundz*class:scrollbar.background,scrollbar.startzclass:scrollbar.buttonz$class:scrollbar.button,scrollbar.end rA   )r    r"   floatr(   r   r6   rJ   ZeroDivisionErrorrD   r   rE   r^   r   r#   r]   r$   )r)   r=   rq   r;   Zwindow_heightr"   Zfraction_visibleZfraction_abovert   rD   rE   r^   Zscrollbar_backgroundZscrollbar_background_startZscrollbar_buttonZscrollbar_button_endirC   r*   rs   r+   rU     sV    
 

 zScrollablePane._draw_scrollbar)__name__
__module____qualname____doc__MAX_AVAILABLE_HEIGHTr,   r0   r2   r4   r8   rK   rT   rP   rQ   rR   rk   rl   rm   rN   rU   r*   r*   r*   r+   r      s4   #&w3BN)
__future__r   Zprompt_toolkit.data_structuresr   Zprompt_toolkit.filtersr   r   Zprompt_toolkit.key_bindingr   Zprompt_toolkit.mouse_eventsr   Z
containersr	   r
   r9   r   r   r   r   r<   r   r   r;   r   r   r   __all__r}   r   r*   r*   r*   r+   <module>   s   