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e � � d S) z:Simple textbox editing widget with Emacs-like keybindings.� Nc C s� | j | d | t j | | d � | j | | d t j | | d � | j | | d t j | | d � | j | d | t j | | d � | j | | t j � | j | | t j � | j | | t j � | j | | t j � d S)z^Draw a rectangle with corners at the provided upper-left
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d S)�Textboxad Editing widget using the interior of a window object.
Supports the following Emacs-like key bindings:
Ctrl-A Go to left edge of window.
Ctrl-B Cursor left, wrapping to previous line if appropriate.
Ctrl-D Delete character under cursor.
Ctrl-E Go to right edge (stripspaces off) or end of line (stripspaces on).
Ctrl-F Cursor right, wrapping to next line when appropriate.
Ctrl-G Terminate, returning the window contents.
Ctrl-H Delete character backward.
Ctrl-J Terminate if the window is 1 line, otherwise insert newline.
Ctrl-K If line is blank, delete it, otherwise clear to end of line.
Ctrl-L Refresh screen.
Ctrl-N Cursor down; move down one line.
Ctrl-O Insert a blank line at cursor location.
Ctrl-P Cursor up; move up one line.
Move operations do nothing if the cursor is at an edge where the movement
is not possible. The following synonyms are supported where possible:
KEY_LEFT = Ctrl-B, KEY_RIGHT = Ctrl-F, KEY_UP = Ctrl-P, KEY_DOWN = Ctrl-N
KEY_BACKSPACE = Ctrl-h
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| t j j k r_d S| t j j k r�| j d k r�d S| | j k rS| j j | d d � n�| t j j k r| d k r�| j | � d k r�| j j � qS| j j | | � | j j � n@| t j j k r5| j j � n | t j j t j f k r�| | j k rS| j j | d | � | | j | d � k rS| j j | d | j | d � � n� | t j j k r�| j j! � n{ | t j j" t j# f k rS| d k rS| j j | d | � | | j | d � k rS| j j | d | j | d � � d S)z!Process a single editing command.r r )$r
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| j j | | � � � } qx W| j d k r$ | d } q$ W| S)z.Collect and return the contents of the window.� r r �
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/zTextbox.gatherNc C sX xK | j j � } | r$ | | � } | s- q | j | � s= P| j j � q W| j � S)z2Edit in the widget window and collect the results.)r Zgetchr# r! r* )r Zvalidater r r r �edit� s z Textbox.edit) �__name__�
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N� � � � � zUse Ctrl-G to end editing.r )r1 r2 )r3 r4 )Zaddstrr Znewwinr
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