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Mini Shell
Mini Shell
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eƒƒ dS ) z:Simple textbox editing widget with Emacs-like keybindings.é Nc C s¼ | |d |tj|| d ¡ | ||d tj|| d ¡ | ||d tj|| d ¡ | |d |tj|| d ¡ | ||tj¡ | ||tj¡ | ||tj¡ | ||tj ¡ dS )z^Draw a rectangle with corners at the provided upper-left
and lower-right coordinates.
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dS )ÚTextboxad 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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r r r Ú__init__+ s zTextbox.__init__c C s& | j ¡ \}}|d | _|d | _d S r )r ZgetmaxyxÚmaxyÚmaxx)r r r r r r r 3 s
zTextbox._update_max_yxc C sX | ¡ | j}tj | j ||¡¡tjjkr@t| j|d ƒ}qTn
|dkrJqT|d }q|S )zuGo to the location of the first blank on the given line,
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r r r Úerrorr ÚisprintÚmove)r Úchr ÚxZbackyxZoldchr r r Ú_insert_printable_charF s$
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tjjtjfkr|dkr¢| j ||d ¡ nB|dkr¬n8| jrÐ| j |d | |d ¡¡ n| j |d | j¡ |tjjtjfkrR| j ¡ nL|tjjkr"| j ¡ n0|tjjkrb| jrN| j || |¡¡ n| j || j¡ nð|tjjtjfkrº|| jk r–| j ||d ¡ n || jkr¤n| j |d d¡ n˜|tjjkrÌdS |tjjkr | jdkrêdS || jk rR| j |d d¡ nF|tjjkrZ|dkr@| |¡dkr@| j ¡ n| j ||¡ | j ¡ nø|tjj krt| j ¡ nÞ|tjj tj fkrØ|| jk rR| j |d |¡ || |d ¡krR| j |d | |d ¡¡ nz|tjj krò| j !¡ n`|tjj"tj#fkrR|dkrR| j |d |¡ || |d ¡krR| j |d | |d ¡¡ dS )z!Process a single editing command.r r )$r r r r r r r r r r ZSOHr ZSTXZKEY_LEFTZBSZ
KEY_BACKSPACEr r ZdelchZEOTZENQZACKZ KEY_RIGHTZBELÚNLZVTZdeletelnZclrtoeolZFFÚrefreshZSOZKEY_DOWNZSIZinsertlnZDLEZKEY_UP)r r r r r r r Ú
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| j ||¡¡ƒ }qT| jdkr|d }q|S )z.Collect and return the contents of the window.Ú r r Ú
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zTextbox.gatherNc C s< | j ¡ }|r||ƒ}|s q | |¡s(q4| j ¡ q | ¡ S )z2Edit in the widget window and collect the results.)r Zgetchr# r" r* )r Úvalidater r r r Úedit± s
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Ar Ú__main__c C sf d\}}d\}}| |d |d¡ t ||||¡}t| |d |d || || ƒ | ¡ t|ƒ ¡ S )N)é é )é é é zUse Ctrl-G to end editing.r )Zaddstrr Znewwinr
r" r r, )ZstdscrZncolsZnlinesr r r r r r Ú test_editbox¿ s r7 zContents of text box:) r0 r Z curses.asciir
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