class Interpreter(PythonEditor):
def setup_margin0(self):
# Disable 1st margin
self.setMarginWidth(0, 0)
def show_line_numbers(self):
pass
def setup_custom(self):
self.editor = self
self._fontsize = 0
self.wrap()
self.history = []
self._outputq = []
self.historyp = -1
self.reading = False
self.pt = None
self.save_stdout = sys.stdout
self.save_stdin = sys.stdin
self.save_stderr = sys.stderr
sys.stdout = self
sys.stderr = self
sys.stdin = self
self.needmore = False
self.cmdthread = None
QtCore.QTimer.singleShot(10, self.writeoutputq)
self.write('>>> ')
def wrap(self):
self.setWrapMode(QsciScintilla.SC_WRAP_CHAR)
def flush(self):
# to suppress AttributeError ...
# Not sure why that is happening and why it is not crashing, but...
pass
def clear(self):
self.history = []
self._outputq = []
super().clear()
self.write('>>> ')
def addcmd(self, cmd, force=False):
'''Clear the current line and write the given command to the
interpreter'''
if not force and self.cmdthread is not None:
# Don't bother writing cmd if there is already
# a thread in progress...
# force=True forces write even if cmd in progress.
return
self.clearline()
self.write(cmd)
if cmd[-1] == '\n':
self.write('>>> ')
self.history.append(cmd.rstrip())
def readline(self):
self.reading = True
while self.reading:
time.sleep(0.1)
pt2 = self.pt
self.pt = None
lenbefore = len(pt2)
pt = self.text()
r = pt[lenbefore:]
r = r.rstrip('\n')
if not r:
r = '\n'
return r
def write(self, text):
'''cannot write directly to the console...
instead, append this text to the output queue for later use.
'''
if text:
self._outputq.append(text)
if len(self._outputq) > 10:
time.sleep(.1)
if Pen.ControlC == 1:
Pen.ControlC += 1
raise KeyboardInterrupt
self.save_stdout.write(text)
def writeoutputq(self):
'''process the text output queue. Must be done from the main thread.
'''
while self._outputq:
text = self._outputq.pop(0)
line, col = self.getCursorPosition()
self.insert(text)
self.setCursorPosition(line, col + len(text))
QtCore.QTimer.singleShot(100, self.scrolldown)
QtCore.QTimer.singleShot(10, self.writeoutputq)
def checkprompt(self):
line, _col = self.getCursorPosition()
txt = self.text(line)
if not txt:
self.write('>>> ')
def cleanup_ControlC(self):
Pen.ControlC = False
self.cmdthread = None
to_remove = []
for pen in self.main_window.user_pens:
if not hasattr(pen, 'drawable') or pen.drawable is None:
to_remove.append(pen)
for pen in to_remove:
self.main_window.defunct_pens.append(pen)
self.main_window.user_pens.remove(pen)
def testthreaddone(self):
self.cleanup_ControlC()
QtCore.QTimer.singleShot(100, self.checkprompt)
def threaddone(self):
self.cleanup_ControlC()
if not self.needmore:
QtCore.QTimer.singleShot(100, self.checkprompt)
else:
self.write('... ')
self.write(' ' * self._indent_level)
self._indent_level = 0
def go(self):
'react as if the ENTER key has been pressed on the keyboard'
ev = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,
QtCore.Qt.Key_Enter,
QtCore.Qt.NoModifier, '\n')
self.keyPressEvent(ev)
def spin(self, n, delay=0.01):
'''call processEvents n times.
If n is 0, continue until cmdthread is None
'''
if n:
for _ in range(n):
time.sleep(delay)
QtGui.QApplication.processEvents(QtCore.QEventLoop.AllEvents)
else:
self.spin(1)
cs = 500
while self.cmdthread is not None:
if not cs:
LOG.info('spin fail')
self.ctrl_c_thread_running()
return False
cs -= 1
time.sleep(delay)
QtGui.QApplication.processEvents(QtCore.QEventLoop.AllEvents)
return True
def indentation(self, linen):
i = 0
txt = self.text(linen)[4:]
if txt.isspace():
return len(txt)
for i, c in enumerate(txt):
if c != ' ':
break
return i
def keyPressEvent(self, ev):
k = ev.key()
mdf = ev.modifiers()
if self.reading and self.pt is None:
self.pt = self.text()
Tab = QtCore.Qt.Key_Tab
Backtab = QtCore.Qt.Key_Backtab
Backspace = QtCore.Qt.Key_Backspace
Left = QtCore.Qt.Key_Left
Right = QtCore.Qt.Key_Right
Return = QtCore.Qt.Key_Return
Enter = QtCore.Qt.Key_Enter
Up = QtCore.Qt.Key_Up
PageUp = QtCore.Qt.Key_PageUp
Down = QtCore.Qt.Key_Down
PageDown = QtCore.Qt.Key_PageDown
Control = QtCore.Qt.ControlModifier
Shift = QtCore.Qt.ShiftModifier
U = QtCore.Qt.Key_U
C = QtCore.Qt.Key_C
V = QtCore.Qt.Key_V
X = QtCore.Qt.Key_X
A = QtCore.Qt.Key_A
Home = QtCore.Qt.Key_Home
E = QtCore.Qt.Key_E
D = QtCore.Qt.Key_D
H = QtCore.Qt.Key_H
Z = QtCore.Qt.Key_Z
passthru = True
scrolldown = True
if k in (Return, Enter):
if self.reading:
self.reading = False
self.movetoend()
line, col = self.getCursorPosition()
txt = self.text(line)
txt = txt[4:].rstrip()
if txt:
if self.history and not self.history[-1]:
# last history entry is blank line
del self.history[-1]
self.history.append(txt)
self.historyp = -1
self.append('\n')
if self.cmdthread is None:
i = self.indentation(line)
if txt.endswith(':'):
i += 4
self._indent_level = i
self.main_window.pen._mark_undo()
self.cmdthread = CmdThread(self, txt)
self.cmdthread.start()
self.watcherthread = WatcherThread(self.cmdthread)
self.watcherthread.finished.connect(self.threaddone)
self.watcherthread.start()
passthru = False
else:
passthru = True
elif k in (Backspace, Tab, Backtab):
line, col = self.getCursorPosition()
lines = self.lines()
i = self.indentation(line)
if line < lines - 1:
passthru = False
scrolldown = True
elif col <= 4 and k != Tab:
passthru = False
self.scroll_left()
elif col <= i + 4:
passthru = False
spaces = col % 4
if not spaces:
spaces = 4
if k != Tab:
self.setSelection(line, 4, line, 4 + spaces)
self.replaceSelectedText('')
self.setCursorPosition(line, col - spaces)
else:
self.insert(' ' * spaces)
self.setCursorPosition(line, 4 + i + spaces)
elif line == lines - 1:
passthru = True
else:
passthru = False
elif mdf & Shift and k == Up:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() - vbar.singleStep())
passthru = False
elif mdf & Shift and k == Down:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() + vbar.singleStep())
passthru = False
elif mdf & Shift and k == PageUp:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() - vbar.pageStep())
passthru = False
elif mdf & Shift and k == PageDown:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() + vbar.pageStep())
passthru = False
elif k == Left:
line, col = self.getCursorPosition()
lines = self.lines()
if line < lines - 1:
passthru = False
scrolldown = True
elif col <= 4:
passthru = False
self.scroll_left()
elif k == Right:
line, col = self.getCursorPosition()
lines = self.lines()
if line < lines - 1:
passthru = False
scrolldown = True
elif k in (Up, Down):
self.scrolldown()
line, col = self.getCursorPosition()
txt = self.text(line)[4:].strip()
if self.cmdthread is not None:
pass
elif not self.history:
QtGui.QApplication.beep()
else:
changeline = True
addthisline = False
lenhist = len(self.history)
if k == Up and self.historyp == -1:
addthisline = True
if k == Up and lenhist == 1:
self.historyp -= 1
elif k == Up and self.historyp <= -lenhist:
QtGui.QApplication.beep()
changeline = False
elif k == Up:
self.historyp -= 1
elif k == Down and self.historyp >= -1:
QtGui.QApplication.beep()
changeline = False
elif k == Down:
self.historyp += 1
if addthisline:
self.history.append(txt)
if changeline:
txt = self.history[self.historyp]
endpos = len(self.text(line))
if self.historyp == -1:
del self.history[-1]
self.setSelection(line, 4, line, endpos)
self.replaceSelectedText(txt)
passthru = False
elif mdf & Control and k == U:
# erase from pen to beginning of line
self.scroll_left()
self.erasetostart()
elif mdf & Control and k == X:
# Cut # No action. Disabled.
scrolldown = False
passthru = False
elif mdf & Control and mdf & Shift and k == X:
# Cut
self.cut() # No action. Disabled.
scrolldown = False
passthru = False
elif mdf & Control and mdf & Shift and k == C:
# Copy
self.copy()
scrolldown = False
passthru = False
elif mdf & Control and mdf & Shift and k == V:
# Paste
self.paste()
scrolldown = False
passthru = False
elif mdf & Control and k == Z:
self.main_window.pen._undo()
scrolldown = True
passthru = False
elif mdf & Control and k == C:
# send keyboard interrupt
LOG.info('Ctrl-C pressed')
import threading
if hasattr(threading, 'threads'):
for pen in threading.threads:
threading.threads[pen] = 0
if self.cmdthread is not None and self.cmdthread.isAlive():
self.ctrl_c_thread_running()
else:
self.ctrl_c_no_thread_running()
self.sync_pens_lists()
elif (mdf & Control and k == A) or k == Home:
self.movetostart()
self.scroll_left()
passthru = False
scrolldown = False
elif mdf & Control and k == E:
self.movetoend()
passthru = False
elif mdf & Control and k == D:
self.main_window.close()
passthru = False
elif mdf & Control and mdf & Shift and k == H:
# Clear history
self.history = []
if scrolldown and ev.text():
self.scrolldown()
if passthru:
super().keyPressEvent(ev)
def update_window_modified(self):
pass
def ctrl_c_thread_running(self):
Pen.ControlC = True
Pen._stop_testall = True
self.main_window.pen._empty_move_queue(lock=True)
for pen in self.main_window.user_pens:
pen._sync_items()
self.needmore = False
self.interpreter.resetbuffer()
def ctrl_c_no_thread_running(self):
Pen.ControlC = False
Pen._stop_testall = True
self.cmdthread = None
self.main_window.pen._empty_move_queue(lock=True)
settings = QtCore.QSettings()
quiet = settings.value('console/quietinterrupt', False, bool)
self.movetoend()
if not quiet:
self.write('\nKeyboardInterrupt\n')
else:
self.write('\n')
self.interpreter.resetbuffer()
self.write('>>> ')
def sync_pens_lists(self):
for p in self.main_window.all_pens:
if p not in self.main_window.user_pens:
p.remove()
if self.main_window.pen not in self.main_window.user_pens:
self.main_window.user_pens.append(self.main_window.pen)
def scrolldown(self):
'''force the console to scroll all the way down.
If the pen is already in the last line,
do not change location of the pen.
If not, move the pen to the last position
in the line.
'''
txt = self.text()
nlines = len(txt.split('\n'))
lastlinen = nlines - 1
lastline = self.text(lastlinen)
line, col = self.getCursorPosition()
if line != lastlinen:
self.setCursorPosition(lastlinen, len(lastline))
if col < 4:
self.setCursorPosition(lastlinen, 4)
vbar = self.verticalScrollBar()
vbar.setValue(vbar.maximum())
def scroll_left(self):
hbar = self.horizontalScrollBar()
hbar.setValue(hbar.minimum())
def mouseReleaseEvent(self, ev):
super().mouseReleaseEvent(ev)
line, col = self.getCursorPosition()
txt = self.text(line)
if col < 4 and not self.hasSelectedText():
if txt.startswith('>>>') or txt.startswith('...'):
self.setCursorPosition(line, 4)
def contextMenuEvent(self, ev):
'''right-click to pop up the context menu.
Adjust displayed shortcut key combo since this is an interactive
shell and ctrl-c is needed for stopping running code.
Connection of actual typed shortcuts is in keyPressEvent()
'''
menu = self.createStandardContextMenu()
actions = menu.actions()
undo = actions[0]
redo = actions[1]
sep0 = actions[2]
cut = actions[3]
copy = actions[4]
paste = actions[5]
delete = actions[6]
menu.removeAction(undo)
menu.removeAction(redo)
menu.removeAction(sep0)
menu.removeAction(cut)
menu.removeAction(copy)
copyaction = QtGui.QAction('Copy', menu)
copyshortcut = QtGui.QKeySequence(QtCore.Qt.CTRL +
QtCore.Qt.SHIFT +
QtCore.Qt.Key_C)
copyaction.setShortcut(copyshortcut)
copyaction.triggered.connect(self.copy)
menu.insertAction(paste, copyaction)
menu.removeAction(paste)
pasteaction = QtGui.QAction('Paste', menu)
pasteshortcut = QtGui.QKeySequence(QtCore.Qt.CTRL +
QtCore.Qt.SHIFT +
QtCore.Qt.Key_V)
pasteaction.setShortcut(pasteshortcut)
pasteaction.triggered.connect(self.paste)
menu.insertAction(delete, pasteaction)
menu.removeAction(delete)
menu.exec_(ev.globalPos())
def cut(self):
pass
def insertFromMimeData(self, data):
self.scrolldown()
super().insertFromMimeData(data)
def movetostart(self):
'''move the pen to the start of the line (after the prompt)'''
line, _col = self.getCursorPosition()
self.setCursorPosition(line, 4)
def movetoend(self):
'''move the pen to the end of the line'''
line, _col = self.getCursorPosition()
self.setCursorPosition(line, len(self.text(line)))
def erasetostart(self):
'''erase from the current pen position to the beginning
of the line
'''
line, col = self.getCursorPosition()
if col == 4:
# line is already empty
return
self.setSelection(line, 4, line, col)
self.replaceSelectedText('')
self.setCursorPosition(line, 4)
def clearline(self):
self.scrolldown()
self.movetoend()
self.erasetostart()
def settitle(self):
pass
def zoomout(self):
self.setfontsize(self._fontsize - 1)
def setfontsize(self, size):
self._fontsize = size
self.zoomTo(size)
def keyPressEvent(self, ev):
k = ev.key()
mdf = ev.modifiers()
if self.reading and self.pt is None:
self.pt = self.text()
Tab = QtCore.Qt.Key_Tab
Backtab = QtCore.Qt.Key_Backtab
Backspace = QtCore.Qt.Key_Backspace
Left = QtCore.Qt.Key_Left
Right = QtCore.Qt.Key_Right
Return = QtCore.Qt.Key_Return
Enter = QtCore.Qt.Key_Enter
Up = QtCore.Qt.Key_Up
PageUp = QtCore.Qt.Key_PageUp
Down = QtCore.Qt.Key_Down
PageDown = QtCore.Qt.Key_PageDown
Control = QtCore.Qt.ControlModifier
Shift = QtCore.Qt.ShiftModifier
U = QtCore.Qt.Key_U
C = QtCore.Qt.Key_C
V = QtCore.Qt.Key_V
X = QtCore.Qt.Key_X
A = QtCore.Qt.Key_A
Home = QtCore.Qt.Key_Home
E = QtCore.Qt.Key_E
D = QtCore.Qt.Key_D
H = QtCore.Qt.Key_H
Z = QtCore.Qt.Key_Z
passthru = True
scrolldown = True
if k in (Return, Enter):
if self.reading:
self.reading = False
self.movetoend()
line, col = self.getCursorPosition()
txt = self.text(line)
txt = txt[4:].rstrip()
if txt:
if self.history and not self.history[-1]:
# last history entry is blank line
del self.history[-1]
self.history.append(txt)
self.historyp = -1
self.append('\n')
if self.cmdthread is None:
i = self.indentation(line)
if txt.endswith(':'):
i += 4
self._indent_level = i
self.main_window.pen._mark_undo()
self.cmdthread = CmdThread(self, txt)
self.cmdthread.start()
self.watcherthread = WatcherThread(self.cmdthread)
self.watcherthread.finished.connect(self.threaddone)
self.watcherthread.start()
passthru = False
else:
passthru = True
elif k in (Backspace, Tab, Backtab):
line, col = self.getCursorPosition()
lines = self.lines()
i = self.indentation(line)
if line < lines - 1:
passthru = False
scrolldown = True
elif col <= 4 and k != Tab:
passthru = False
self.scroll_left()
elif col <= i + 4:
passthru = False
spaces = col % 4
if not spaces:
spaces = 4
if k != Tab:
self.setSelection(line, 4, line, 4 + spaces)
self.replaceSelectedText('')
self.setCursorPosition(line, col - spaces)
else:
self.insert(' ' * spaces)
self.setCursorPosition(line, 4 + i + spaces)
elif line == lines - 1:
passthru = True
else:
passthru = False
elif mdf & Shift and k == Up:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() - vbar.singleStep())
passthru = False
elif mdf & Shift and k == Down:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() + vbar.singleStep())
passthru = False
elif mdf & Shift and k == PageUp:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() - vbar.pageStep())
passthru = False
elif mdf & Shift and k == PageDown:
vbar = self.verticalScrollBar()
vbar.setValue(vbar.value() + vbar.pageStep())
passthru = False
elif k == Left:
line, col = self.getCursorPosition()
lines = self.lines()
if line < lines - 1:
passthru = False
scrolldown = True
elif col <= 4:
passthru = False
self.scroll_left()
elif k == Right:
line, col = self.getCursorPosition()
lines = self.lines()
if line < lines - 1:
passthru = False
scrolldown = True
elif k in (Up, Down):
self.scrolldown()
line, col = self.getCursorPosition()
txt = self.text(line)[4:].strip()
if self.cmdthread is not None:
pass
elif not self.history:
QtGui.QApplication.beep()
else:
changeline = True
addthisline = False
lenhist = len(self.history)
if k == Up and self.historyp == -1:
addthisline = True
if k == Up and lenhist == 1:
self.historyp -= 1
elif k == Up and self.historyp <= -lenhist:
QtGui.QApplication.beep()
changeline = False
elif k == Up:
self.historyp -= 1
elif k == Down and self.historyp >= -1:
QtGui.QApplication.beep()
changeline = False
elif k == Down:
self.historyp += 1
if addthisline:
self.history.append(txt)
if changeline:
txt = self.history[self.historyp]
endpos = len(self.text(line))
if self.historyp == -1:
del self.history[-1]
self.setSelection(line, 4, line, endpos)
self.replaceSelectedText(txt)
passthru = False
elif mdf & Control and k == U:
# erase from pen to beginning of line
self.scroll_left()
self.erasetostart()
elif mdf & Control and k == X:
# Cut # No action. Disabled.
scrolldown = False
passthru = False
elif mdf & Control and mdf & Shift and k == X:
# Cut
self.cut() # No action. Disabled.
scrolldown = False
passthru = False
elif mdf & Control and mdf & Shift and k == C:
# Copy
self.copy()
scrolldown = False
passthru = False
elif mdf & Control and mdf & Shift and k == V:
# Paste
self.paste()
scrolldown = False
passthru = False
elif mdf & Control and k == Z:
self.main_window.pen._undo()
scrolldown = True
passthru = False
elif mdf & Control and k == C:
# send keyboard interrupt
LOG.info('Ctrl-C pressed')
import threading
if hasattr(threading, 'threads'):
for pen in threading.threads:
threading.threads[pen] = 0
if self.cmdthread is not None and self.cmdthread.isAlive():
self.ctrl_c_thread_running()
else:
self.ctrl_c_no_thread_running()
self.sync_pens_lists()
elif (mdf & Control and k == A) or k == Home:
self.movetostart()
self.scroll_left()
passthru = False
scrolldown = False
elif mdf & Control and k == E:
self.movetoend()
passthru = False
elif mdf & Control and k == D:
self.main_window.close()
passthru = False
elif mdf & Control and mdf & Shift and k == H:
# Clear history
self.history = []
if scrolldown and ev.text():
self.scrolldown()
if passthru:
super().keyPressEvent(ev)
