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File/Folder	Size	Actions
__init__.py	1.77 KB	Del OK
__init__.pyc	1.52 KB	Del OK
__init__.pyo	1.52 KB	Del OK
ascii.py	2.55 KB	Del OK
ascii.pyc	4.97 KB	Del OK
ascii.pyo	4.97 KB	Del OK
has_key.py	5.5 KB	Del OK
has_key.pyc	5.8 KB	Del OK
has_key.pyo	5.8 KB	Del OK
panel.py	110 B	Del OK
panel.pyc	277 B	Del OK
panel.pyo	277 B	Del OK
textpad.py	7.17 KB	Del OK
textpad.pyc	6.71 KB	Del OK
textpad.pyo	6.71 KB	Del OK
wrapper.py	1.64 KB	Del OK
wrapper.pyc	1.19 KB	Del OK
wrapper.pyo	1.19 KB	Del OK

Edit: textpad.py

"""Simple textbox editing widget with Emacs-like keybindings.""" import curses import curses.ascii def rectangle(win, uly, ulx, lry, lrx): """Draw a rectangle with corners at the provided upper-left and lower-right coordinates. """ win.vline(uly+1, ulx, curses.ACS_VLINE, lry - uly - 1) win.hline(uly, ulx+1, curses.ACS_HLINE, lrx - ulx - 1) win.hline(lry, ulx+1, curses.ACS_HLINE, lrx - ulx - 1) win.vline(uly+1, lrx, curses.ACS_VLINE, lry - uly - 1) win.addch(uly, ulx, curses.ACS_ULCORNER) win.addch(uly, lrx, curses.ACS_URCORNER) win.addch(lry, lrx, curses.ACS_LRCORNER) win.addch(lry, ulx, curses.ACS_LLCORNER) class Textbox: """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 """ def __init__(self, win, insert_mode=False): self.win = win self.insert_mode = insert_mode (self.maxy, self.maxx) = win.getmaxyx() self.maxy = self.maxy - 1 self.maxx = self.maxx - 1 self.stripspaces = 1 self.lastcmd = None win.keypad(1) def _end_of_line(self, y): """Go to the location of the first blank on the given line, returning the index of the last non-blank character.""" last = self.maxx while True: if curses.ascii.ascii(self.win.inch(y, last)) != curses.ascii.SP: last = min(self.maxx, last+1) break elif last == 0: break last = last - 1 return last def _insert_printable_char(self, ch): (y, x) = self.win.getyx() if y < self.maxy or x < self.maxx: if self.insert_mode: oldch = self.win.inch() # The try-catch ignores the error we trigger from some curses # versions by trying to write into the lowest-rightmost spot # in the window. try: self.win.addch(ch) except curses.error: pass if self.insert_mode: (backy, backx) = self.win.getyx() if curses.ascii.isprint(oldch): self._insert_printable_char(oldch) self.win.move(backy, backx) def do_command(self, ch): "Process a single editing command." (y, x) = self.win.getyx() self.lastcmd = ch if curses.ascii.isprint(ch): if y < self.maxy or x < self.maxx: self._insert_printable_char(ch) elif ch == curses.ascii.SOH: # ^a self.win.move(y, 0) elif ch in (curses.ascii.STX,curses.KEY_LEFT, curses.ascii.BS,curses.KEY_BACKSPACE): if x > 0: self.win.move(y, x-1) elif y == 0: pass elif self.stripspaces: self.win.move(y-1, self._end_of_line(y-1)) else: self.win.move(y-1, self.maxx) if ch in (curses.ascii.BS, curses.KEY_BACKSPACE): self.win.delch() elif ch == curses.ascii.EOT: # ^d self.win.delch() elif ch == curses.ascii.ENQ: # ^e if self.stripspaces: self.win.move(y, self._end_of_line(y)) else: self.win.move(y, self.maxx) elif ch in (curses.ascii.ACK, curses.KEY_RIGHT): # ^f if x < self.maxx: self.win.move(y, x+1) elif y == self.maxy: pass else: self.win.move(y+1, 0) elif ch == curses.ascii.BEL: # ^g return 0 elif ch == curses.ascii.NL: # ^j if self.maxy == 0: return 0 elif y < self.maxy: self.win.move(y+1, 0) elif ch == curses.ascii.VT: # ^k if x == 0 and self._end_of_line(y) == 0: self.win.deleteln() else: # first undo the effect of self._end_of_line self.win.move(y, x) self.win.clrtoeol() elif ch == curses.ascii.FF: # ^l self.win.refresh() elif ch in (curses.ascii.SO, curses.KEY_DOWN): # ^n if y < self.maxy: self.win.move(y+1, x) if x > self._end_of_line(y+1): self.win.move(y+1, self._end_of_line(y+1)) elif ch == curses.ascii.SI: # ^o self.win.insertln() elif ch in (curses.ascii.DLE, curses.KEY_UP): # ^p if y > 0: self.win.move(y-1, x) if x > self._end_of_line(y-1): self.win.move(y-1, self._end_of_line(y-1)) return 1 def gather(self): "Collect and return the contents of the window." result = "" for y in range(self.maxy+1): self.win.move(y, 0) stop = self._end_of_line(y) if stop == 0 and self.stripspaces: continue for x in range(self.maxx+1): if self.stripspaces and x > stop: break result = result + chr(curses.ascii.ascii(self.win.inch(y, x))) if self.maxy > 0: result = result + "\n" return result def edit(self, validate=None): "Edit in the widget window and collect the results." while 1: ch = self.win.getch() if validate: ch = validate(ch) if not ch: continue if not self.do_command(ch): break self.win.refresh() return self.gather() if __name__ == '__main__': def test_editbox(stdscr): ncols, nlines = 9, 4 uly, ulx = 15, 20 stdscr.addstr(uly-2, ulx, "Use Ctrl-G to end editing.") win = curses.newwin(nlines, ncols, uly, ulx) rectangle(stdscr, uly-1, ulx-1, uly + nlines, ulx + ncols) stdscr.refresh() return Textbox(win).edit() str = curses.wrapper(test_editbox) print 'Contents of text box:', repr(str)
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