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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.5)
-
- '''Simple textbox editing widget with Emacs-like keybindings.'''
- import curses
- import 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):
- self.win = win
- (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.'''
- last = self.maxx
- while ascii.ascii(self.win.inch(y, last)) != ascii.SP:
- last = min(self.maxx, last + 1)
- break
- if last == 0:
- break
-
- last = last - 1
- continue
- return last
-
-
- def do_command(self, ch):
- '''Process a single editing command.'''
- (y, x) = self.win.getyx()
- self.lastcmd = ch
- if ascii.isprint(ch):
- if y < self.maxy or x < self.maxx:
-
- try:
- self.win.addch(ch)
- except curses.error:
- pass
- except:
- None<EXCEPTION MATCH>curses.error
-
-
- None<EXCEPTION MATCH>curses.error
- elif ch == ascii.SOH:
- self.win.move(y, 0)
- elif ch in (ascii.STX, curses.KEY_LEFT, 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 (ascii.BS, curses.KEY_BACKSPACE):
- self.win.delch()
-
- elif ch == ascii.EOT:
- self.win.delch()
- elif ch == ascii.ENQ:
- if self.stripspaces:
- self.win.move(y, self._end_of_line(y))
- else:
- self.win.move(y, self.maxx)
- elif ch in (ascii.ACK, curses.KEY_RIGHT):
- if x < self.maxx:
- self.win.move(y, x + 1)
- elif y == self.maxy:
- pass
- else:
- self.win.move(y + 1, 0)
- elif ch == ascii.BEL:
- return 0
- elif ch == ascii.NL:
- if self.maxy == 0:
- return 0
- elif y < self.maxy:
- self.win.move(y + 1, 0)
-
- elif ch == ascii.VT:
- if x == 0 and self._end_of_line(y) == 0:
- self.win.deleteln()
- else:
- self.win.move(y, x)
- self.win.clrtoeol()
- elif ch == ascii.FF:
- self.win.refresh()
- elif ch in (ascii.SO, curses.KEY_DOWN):
- 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 == ascii.SI:
- self.win.insertln()
- elif ch in (ascii.DLE, curses.KEY_UP):
- 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(ascii.ascii(self.win.inch(y, x)))
-
- if self.maxy > 0:
- result = result + '\n'
- continue
-
- return result
-
-
- def edit(self, validate = None):
- '''Edit in the widget window and collect the results.'''
- while None:
- ch = self.win.getch()
- if validate:
- ch = validate(ch)
-
- if not ch:
- continue
-
- if not self.do_command(ch):
- break
-
- continue
- 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)
-
-