def interrupt(self):
'Handle ^C, exit from Python sesson'
# raw mode terminal doesn't respond to ^C, must handle here
util.putstr('^C')
terminal.set_line_mode() # on new line...
print() # ... otherwise traceback is a mess
raise KeyboardInterrupt
def update(buf):
if session.session.foreground == session.eden and ed.buf == buf:
terminal.set_line_mode()
edsel.win.update(open_line=(not ed.command_mode)) # open line in insert mode
# restore cursor to eden cmd line (bottom of scroll region), edit point
display.put_cursor(edsel.cmd_n, 1) # FIXME just get it running for now
terminal.set_char_mode() # FIXME should restore whatever was before
def main():
'Demonstrate Key class'
key = Key()
util.putstr('> ')
terminal.set_char_mode()
line = ''
k = '' # anything but cr
while k != keyboard.cr:
k = key()
line += k
util.putstr(k)
terminal.set_line_mode()
print()
print([ c for c in line ]) # show any esc or other unprintables
def main():
import terminal # only needed for this test
def edit():
'event loop for testing inputline'
while True:
# reads single chars, arrow keys won't work
key = terminal.getchar()
if key in printing_chars or key in command.keymap:
command.handler(key)
else:
break
print('Enter and edit a fresh line:')
util.putstr(command.prompt)
terminal.set_char_mode()
# inputline event loop
edit()
# based on Console restore method
terminal.set_line_mode()
print() # advance to next line
command.redraw() # echo so we can see what we edited
print()
# Caller can reassign prompt, line to edit, and point
print('Now edit a previously entered line:')
command.reinit(prompt='>> ', line='Here is some text to edit.', point=0)
util.putstr(command.prompt)
# command.redraw() # no good - resets point
util.putstr(command.line) # preserves point
command.move_to_point() # restore cursor to point
terminal.set_char_mode()
edit()
terminal.set_line_mode()
print()
print(command.line)
def update(op, sourcebuf=None, buffer=None, origin=0, destination=0,
start=0, end=0, column=1): # display column numbers are 1-based
'Update the display: one window, several, or the entire frame.'
global mode, win, ifocus, cmd_h
# Clear display, redraw all the windows and scrolling command region.
if op == Op.refresh:
refresh(column=column)
# Restore full screen scrolling, cursor to bottom
elif op == Op.restore:
display.set_scroll_all()
display.put_cursor(nlines,1)
# Rescale frame and window sizes, then refresh.
elif op == Op.rescale:
cmd_h = start if start else cmd_h
rescale()
# Create new buffer, ed B, Op.insert case will display its contents.
elif op == Op.create:
win.focus = True
win.buf = buffer
win.locate_segment(win.buf.dot)
win.saved_dot = win.buf.dot
win.reupdate()
# Change buffer in current window, ed b E D
elif op == Op.select:
win.focus = True
win.buf = buffer
win.reupdate()
# Delete current buffer, ed D
elif op == Op.remove:
for w in windows:
if w.buf == sourcebuf: # deleted buffer
w.buf = buffer # new current buffer
w.reupdate()
# Switch to ed input mode, for ed a i c commands
elif op == Op.input:
mode = Mode.input
window.show_marker = False
win.update_for_input()
wdot = win.wline(win.buf.dot)
display.put_cursor(wdot+1,1)
# Switch to ed command mode, ed . while in input mode
elif op == Op.command:
mode = Mode.command
window.show_marker = True
# Overwrite '.' line on display, and lines below.
win.update_from(win.buf.dot + 1)
win.set_marker(win.buf.dot)
# Switch to eden display mode
elif op == Op.display:
mode = Mode.display
window.show_marker = False
put_display_cursor(column=column)
# Dot moved, ed l command
elif op == Op.locate:
win.locate(origin, destination)
# Insert text: ed a i c m r t y commands
# start, end are after insert, start == destination, end == win.buf.dot
elif op == Op.insert and origin != background_task:
if mode != Mode.input: # ed commands m r t y
win.insert(origin, start, end)
elif mode == Mode.input: # input mode after ed commands a i c
# Text at dot is already up-to-date on display, open next line.
win.update_for_input()
for w in windows:
if w.samebuf(win):
w.adjust_insert(start, end, destination)
if mode == Mode.input: # can't put input cursor til other windows done
win.put_cursor_for_input(column=1)
# Background task inserts text by calling buffer write() method.
# Search for windows (if any) which displays that buffer.
elif op == Op.insert and origin == background_task:
for w in windows:
if w.buf == buffer:
w.saved_dot = w.buf.dot
terminal.set_line_mode()
w.insert(origin, start, end)
terminal.set_char_mode()
if mode == Mode.input: # can't put input cursor til other windows done
win.put_cursor_for_input(column=column)
elif mode == Mode.display:
put_display_cursor(column=column)
else:
pass # Mode.commmand handled at the end of this fcn
# Delete text: ed d m command
# start,end are line numbers before delete, destination == win.buf.dot
elif op == Op.delete:
win.delete(destination)
for w in windows:
if w.samebuf(win):
w.adjust_delete(start, end, destination)
# Change text: ed s command
# Update all lines in start..destination, don't know which lines changed
elif op == Op.mutate:
win.mutate(origin, start, destination)
for w in windows:
if w.samebuf(win):
if w.intersects(start, destination):
w.mutate_lines(start, destination)
# Switch to next window, edsel o command
elif op == Op.next:
w0 = win
w0.release_focus()
w0.update_status()
ifocus = ifocus+1 if ifocus+1 < len(windows) else 0
win = windows[ifocus]
win.set_focus()
win.update_status()
# Delete all but current window, edsel o1 cmd
elif op == Op.single:
windows[:] = [win]
ifocus = 0
win.resize(frame_top, windows_h-1, ncols) # one window, -1 excl status
win.reupdate()
# Split window, new window above becomes current window, edsel o2 command
elif op == Op.hsplit:
win_top = win.top
win_nlines = win.nlines // 2
w0 = win
w0.release_focus()
w0.resize(win_top + win_nlines, w0.nlines - win_nlines, ncols)
w0.move_update(w0.saved_dot)
win = window.Window(win.buf,win_top,win_nlines-1,ncols) #-1 excl status
win.focus = True
windows.insert(ifocus, win)
win.reupdate()
# Update status line for given buffer in all of its windows
elif op == Op.status:
for w in windows:
if w.buf == buffer:
w.update_status()
# In command mode put ed command cursor back in scrolling command region.
# Then we can call standard Python input() or Piety Console restart().
if mode == Mode.command:
put_command_cursor(column=column) # background task can set column
# Each Op... case handles other modes, see refresh() and Op.refresh
# Is that necessary? I recall it's because some cases use default column=1
return win # caller might need to know which window was selected
def restore(self):
'Restore terminal line mode, prepare to print on new line'
terminal.set_line_mode()
print()
