|
|
# Standard library imports
|
|
|
import re
|
|
|
import sys
|
|
|
|
|
|
# System library imports
|
|
|
from PyQt4 import QtCore, QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from completion_widget import CompletionWidget
|
|
|
|
|
|
|
|
|
class AnsiCodeProcessor(object):
|
|
|
""" Translates ANSI escape codes into readable attributes.
|
|
|
"""
|
|
|
|
|
|
def __init__(self):
|
|
|
self.ansi_colors = ( # Normal, Bright/Light
|
|
|
('#000000', '#7f7f7f'), # 0: black
|
|
|
('#cd0000', '#ff0000'), # 1: red
|
|
|
('#00cd00', '#00ff00'), # 2: green
|
|
|
('#cdcd00', '#ffff00'), # 3: yellow
|
|
|
('#0000ee', '#0000ff'), # 4: blue
|
|
|
('#cd00cd', '#ff00ff'), # 5: magenta
|
|
|
('#00cdcd', '#00ffff'), # 6: cyan
|
|
|
('#e5e5e5', '#ffffff')) # 7: white
|
|
|
self.reset()
|
|
|
|
|
|
def set_code(self, code):
|
|
|
""" Set attributes based on code.
|
|
|
"""
|
|
|
if code == 0:
|
|
|
self.reset()
|
|
|
elif code == 1:
|
|
|
self.intensity = 1
|
|
|
self.bold = True
|
|
|
elif code == 3:
|
|
|
self.italic = True
|
|
|
elif code == 4:
|
|
|
self.underline = True
|
|
|
elif code == 22:
|
|
|
self.intensity = 0
|
|
|
self.bold = False
|
|
|
elif code == 23:
|
|
|
self.italic = False
|
|
|
elif code == 24:
|
|
|
self.underline = False
|
|
|
elif code >= 30 and code <= 37:
|
|
|
self.foreground_color = code - 30
|
|
|
elif code == 39:
|
|
|
self.foreground_color = None
|
|
|
elif code >= 40 and code <= 47:
|
|
|
self.background_color = code - 40
|
|
|
elif code == 49:
|
|
|
self.background_color = None
|
|
|
|
|
|
def reset(self):
|
|
|
""" Reset attributs to their default values.
|
|
|
"""
|
|
|
self.intensity = 0
|
|
|
self.italic = False
|
|
|
self.bold = False
|
|
|
self.underline = False
|
|
|
self.foreground_color = None
|
|
|
self.background_color = None
|
|
|
|
|
|
|
|
|
class QtAnsiCodeProcessor(AnsiCodeProcessor):
|
|
|
""" Translates ANSI escape codes into QTextCharFormats.
|
|
|
"""
|
|
|
|
|
|
def get_format(self):
|
|
|
""" Returns a QTextCharFormat that encodes the current style attributes.
|
|
|
"""
|
|
|
format = QtGui.QTextCharFormat()
|
|
|
|
|
|
# Set foreground color
|
|
|
if self.foreground_color is not None:
|
|
|
color = self.ansi_colors[self.foreground_color][self.intensity]
|
|
|
format.setForeground(QtGui.QColor(color))
|
|
|
|
|
|
# Set background color
|
|
|
if self.background_color is not None:
|
|
|
color = self.ansi_colors[self.background_color][self.intensity]
|
|
|
format.setBackground(QtGui.QColor(color))
|
|
|
|
|
|
# Set font weight/style options
|
|
|
if self.bold:
|
|
|
format.setFontWeight(QtGui.QFont.Bold)
|
|
|
else:
|
|
|
format.setFontWeight(QtGui.QFont.Normal)
|
|
|
format.setFontItalic(self.italic)
|
|
|
format.setFontUnderline(self.underline)
|
|
|
|
|
|
return format
|
|
|
|
|
|
|
|
|
class ConsoleWidget(QtGui.QPlainTextEdit):
|
|
|
""" Base class for console-type widgets. This class is mainly concerned with
|
|
|
dealing with the prompt, keeping the cursor inside the editing line, and
|
|
|
handling ANSI escape sequences.
|
|
|
"""
|
|
|
|
|
|
# Whether to process ANSI escape codes.
|
|
|
ansi_codes = True
|
|
|
|
|
|
# The maximum number of lines of text before truncation.
|
|
|
buffer_size = 500
|
|
|
|
|
|
# Whether to use a CompletionWidget or plain text output for tab completion.
|
|
|
gui_completion = True
|
|
|
|
|
|
# Whether to override ShortcutEvents for the keybindings defined by this
|
|
|
# widget (Ctrl+n, Ctrl+a, etc). Enable this if you want this widget to take
|
|
|
# priority (when it has focus) over, e.g., window-level menu shortcuts.
|
|
|
override_shortcuts = False
|
|
|
|
|
|
# Protected class variables.
|
|
|
_ansi_pattern = re.compile('\x01?\x1b\[(.*?)m\x02?')
|
|
|
_ctrl_down_remap = { QtCore.Qt.Key_B : QtCore.Qt.Key_Left,
|
|
|
QtCore.Qt.Key_F : QtCore.Qt.Key_Right,
|
|
|
QtCore.Qt.Key_A : QtCore.Qt.Key_Home,
|
|
|
QtCore.Qt.Key_E : QtCore.Qt.Key_End,
|
|
|
QtCore.Qt.Key_P : QtCore.Qt.Key_Up,
|
|
|
QtCore.Qt.Key_N : QtCore.Qt.Key_Down,
|
|
|
QtCore.Qt.Key_D : QtCore.Qt.Key_Delete, }
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'QObject' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, parent=None):
|
|
|
QtGui.QPlainTextEdit.__init__(self, parent)
|
|
|
|
|
|
# Initialize protected variables.
|
|
|
self._ansi_processor = QtAnsiCodeProcessor()
|
|
|
self._completion_widget = CompletionWidget(self)
|
|
|
self._continuation_prompt = '> '
|
|
|
self._executing = False
|
|
|
self._prompt = ''
|
|
|
self._prompt_pos = 0
|
|
|
self._reading = False
|
|
|
|
|
|
# Set a monospaced font.
|
|
|
self.reset_font()
|
|
|
|
|
|
# Define a custom context menu.
|
|
|
self._context_menu = QtGui.QMenu(self)
|
|
|
|
|
|
copy_action = QtGui.QAction('Copy', self)
|
|
|
copy_action.triggered.connect(self.copy)
|
|
|
self.copyAvailable.connect(copy_action.setEnabled)
|
|
|
self._context_menu.addAction(copy_action)
|
|
|
|
|
|
self._paste_action = QtGui.QAction('Paste', self)
|
|
|
self._paste_action.triggered.connect(self.paste)
|
|
|
self._context_menu.addAction(self._paste_action)
|
|
|
self._context_menu.addSeparator()
|
|
|
|
|
|
select_all_action = QtGui.QAction('Select All', self)
|
|
|
select_all_action.triggered.connect(self.selectAll)
|
|
|
self._context_menu.addAction(select_all_action)
|
|
|
|
|
|
def event(self, event):
|
|
|
""" Reimplemented to override shortcuts, if necessary.
|
|
|
"""
|
|
|
# On Mac OS, it is always unnecessary to override shortcuts, hence the
|
|
|
# check below. Users should just use the Control key instead of the
|
|
|
# Command key.
|
|
|
if self.override_shortcuts and \
|
|
|
sys.platform != 'darwin' and \
|
|
|
event.type() == QtCore.QEvent.ShortcutOverride and \
|
|
|
self._control_down(event.modifiers()) and \
|
|
|
event.key() in self._ctrl_down_remap:
|
|
|
event.accept()
|
|
|
return True
|
|
|
else:
|
|
|
return QtGui.QPlainTextEdit.event(self, event)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'QWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def contextMenuEvent(self, event):
|
|
|
""" Reimplemented to create a menu without destructive actions like
|
|
|
'Cut' and 'Delete'.
|
|
|
"""
|
|
|
clipboard_empty = QtGui.QApplication.clipboard().text().isEmpty()
|
|
|
self._paste_action.setEnabled(not clipboard_empty)
|
|
|
|
|
|
self._context_menu.exec_(event.globalPos())
|
|
|
|
|
|
def keyPressEvent(self, event):
|
|
|
""" Reimplemented to create a console-like interface.
|
|
|
"""
|
|
|
intercepted = False
|
|
|
cursor = self.textCursor()
|
|
|
position = cursor.position()
|
|
|
key = event.key()
|
|
|
ctrl_down = self._control_down(event.modifiers())
|
|
|
alt_down = event.modifiers() & QtCore.Qt.AltModifier
|
|
|
shift_down = event.modifiers() & QtCore.Qt.ShiftModifier
|
|
|
|
|
|
# Even though we have reimplemented 'paste', the C++ level slot is still
|
|
|
# called by Qt. So we intercept the key press here.
|
|
|
if event.matches(QtGui.QKeySequence.Paste):
|
|
|
self.paste()
|
|
|
intercepted = True
|
|
|
|
|
|
elif ctrl_down:
|
|
|
if key in self._ctrl_down_remap:
|
|
|
ctrl_down = False
|
|
|
key = self._ctrl_down_remap[key]
|
|
|
event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, key,
|
|
|
QtCore.Qt.NoModifier)
|
|
|
|
|
|
elif key == QtCore.Qt.Key_K:
|
|
|
if self._in_buffer(position):
|
|
|
cursor.movePosition(QtGui.QTextCursor.EndOfLine,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Y:
|
|
|
self.paste()
|
|
|
intercepted = True
|
|
|
|
|
|
elif alt_down:
|
|
|
if key == QtCore.Qt.Key_B:
|
|
|
self.setTextCursor(self._get_word_start_cursor(position))
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_F:
|
|
|
self.setTextCursor(self._get_word_end_cursor(position))
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Backspace:
|
|
|
cursor = self._get_word_start_cursor(position)
|
|
|
cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_D:
|
|
|
cursor = self._get_word_end_cursor(position)
|
|
|
cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
intercepted = True
|
|
|
|
|
|
if self._completion_widget.isVisible():
|
|
|
self._completion_widget.keyPressEvent(event)
|
|
|
intercepted = event.isAccepted()
|
|
|
|
|
|
else:
|
|
|
if key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter):
|
|
|
if self._reading:
|
|
|
self._reading = False
|
|
|
elif not self._executing:
|
|
|
self.execute(interactive=True)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Up:
|
|
|
if self._reading or not self._up_pressed():
|
|
|
intercepted = True
|
|
|
else:
|
|
|
prompt_line = self._get_prompt_cursor().blockNumber()
|
|
|
intercepted = cursor.blockNumber() <= prompt_line
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Down:
|
|
|
if self._reading or not self._down_pressed():
|
|
|
intercepted = True
|
|
|
else:
|
|
|
end_line = self._get_end_cursor().blockNumber()
|
|
|
intercepted = cursor.blockNumber() == end_line
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Tab:
|
|
|
if self._reading:
|
|
|
intercepted = False
|
|
|
else:
|
|
|
intercepted = not self._tab_pressed()
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Left:
|
|
|
intercepted = not self._in_buffer(position - 1)
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Home:
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfLine)
|
|
|
start_pos = cursor.position()
|
|
|
start_line = cursor.blockNumber()
|
|
|
if start_line == self._get_prompt_cursor().blockNumber():
|
|
|
start_pos += len(self._prompt)
|
|
|
else:
|
|
|
start_pos += len(self._continuation_prompt)
|
|
|
if shift_down and self._in_buffer(position):
|
|
|
self._set_selection(position, start_pos)
|
|
|
else:
|
|
|
self._set_position(start_pos)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Backspace and not alt_down:
|
|
|
|
|
|
# Line deletion (remove continuation prompt)
|
|
|
len_prompt = len(self._continuation_prompt)
|
|
|
if cursor.columnNumber() == len_prompt and \
|
|
|
position != self._prompt_pos:
|
|
|
cursor.setPosition(position - len_prompt,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
|
|
|
# Regular backwards deletion
|
|
|
else:
|
|
|
anchor = cursor.anchor()
|
|
|
if anchor == position:
|
|
|
intercepted = not self._in_buffer(position - 1)
|
|
|
else:
|
|
|
intercepted = not self._in_buffer(min(anchor, position))
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Delete:
|
|
|
anchor = cursor.anchor()
|
|
|
intercepted = not self._in_buffer(min(anchor, position))
|
|
|
|
|
|
# Don't move cursor if control is down to allow copy-paste using
|
|
|
# the keyboard in any part of the buffer.
|
|
|
if not ctrl_down:
|
|
|
self._keep_cursor_in_buffer()
|
|
|
|
|
|
if not intercepted:
|
|
|
QtGui.QPlainTextEdit.keyPressEvent(self, event)
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# 'QPlainTextEdit' interface
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def appendPlainText(self, text):
|
|
|
""" Reimplemented to not append text as a new paragraph, which doesn't
|
|
|
make sense for a console widget. Also, if enabled, handle ANSI
|
|
|
codes.
|
|
|
"""
|
|
|
cursor = self.textCursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.End)
|
|
|
|
|
|
if self.ansi_codes:
|
|
|
format = QtGui.QTextCharFormat()
|
|
|
previous_end = 0
|
|
|
for match in self._ansi_pattern.finditer(text):
|
|
|
cursor.insertText(text[previous_end:match.start()], format)
|
|
|
previous_end = match.end()
|
|
|
for code in match.group(1).split(';'):
|
|
|
self._ansi_processor.set_code(int(code))
|
|
|
format = self._ansi_processor.get_format()
|
|
|
cursor.insertText(text[previous_end:], format)
|
|
|
else:
|
|
|
cursor.insertText(text)
|
|
|
|
|
|
def clear(self, keep_input=False):
|
|
|
""" Reimplemented to write a new prompt. If 'keep_input' is set,
|
|
|
restores the old input buffer when the new prompt is written.
|
|
|
"""
|
|
|
super(ConsoleWidget, self).clear()
|
|
|
|
|
|
if keep_input:
|
|
|
input_buffer = self.input_buffer
|
|
|
self._show_prompt()
|
|
|
if keep_input:
|
|
|
self.input_buffer = input_buffer
|
|
|
|
|
|
def paste(self):
|
|
|
""" Reimplemented to ensure that text is pasted in the editing region.
|
|
|
"""
|
|
|
self._keep_cursor_in_buffer()
|
|
|
QtGui.QPlainTextEdit.paste(self)
|
|
|
|
|
|
def print_(self, printer):
|
|
|
""" Reimplemented to work around a bug in PyQt: the C++ level 'print_'
|
|
|
slot has the wrong signature.
|
|
|
"""
|
|
|
QtGui.QPlainTextEdit.print_(self, printer)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def execute(self, interactive=False):
|
|
|
""" Execute the text in the input buffer. Returns whether the input
|
|
|
buffer was completely processed and a new prompt created.
|
|
|
"""
|
|
|
self.appendPlainText('\n')
|
|
|
self._executing_input_buffer = self.input_buffer
|
|
|
self._executing = True
|
|
|
self._prompt_finished()
|
|
|
return self._execute(interactive=interactive)
|
|
|
|
|
|
def _get_input_buffer(self):
|
|
|
""" The text that the user has entered entered at the current prompt.
|
|
|
"""
|
|
|
# If we're executing, the input buffer may not even exist anymore due to
|
|
|
# the limit imposed by 'buffer_size'. Therefore, we store it.
|
|
|
if self._executing:
|
|
|
return self._executing_input_buffer
|
|
|
|
|
|
cursor = self._get_end_cursor()
|
|
|
cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor)
|
|
|
|
|
|
# Use QTextDocumentFragment intermediate object because it strips
|
|
|
# out the Unicode line break characters that Qt insists on inserting.
|
|
|
input_buffer = str(cursor.selection().toPlainText())
|
|
|
|
|
|
# Strip out continuation prompts.
|
|
|
return input_buffer.replace('\n' + self._continuation_prompt, '\n')
|
|
|
|
|
|
def _set_input_buffer(self, string):
|
|
|
""" Replaces the text in the input buffer with 'string'.
|
|
|
"""
|
|
|
# Add continuation prompts where necessary.
|
|
|
lines = string.splitlines()
|
|
|
for i in xrange(1, len(lines)):
|
|
|
lines[i] = self._continuation_prompt + lines[i]
|
|
|
string = '\n'.join(lines)
|
|
|
|
|
|
# Replace buffer with new text.
|
|
|
cursor = self._get_end_cursor()
|
|
|
cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.insertText(string)
|
|
|
self.moveCursor(QtGui.QTextCursor.End)
|
|
|
|
|
|
input_buffer = property(_get_input_buffer, _set_input_buffer)
|
|
|
|
|
|
def _get_input_buffer_cursor_line(self):
|
|
|
""" The text in the line of the input buffer in which the user's cursor
|
|
|
rests. Returns a string if there is such a line; otherwise, None.
|
|
|
"""
|
|
|
if self._executing:
|
|
|
return None
|
|
|
cursor = self.textCursor()
|
|
|
if cursor.position() >= self._prompt_pos:
|
|
|
text = str(cursor.block().text())
|
|
|
if cursor.blockNumber() == self._get_prompt_cursor().blockNumber():
|
|
|
return text[len(self._prompt):]
|
|
|
else:
|
|
|
return text[len(self._continuation_prompt):]
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
input_buffer_cursor_line = property(_get_input_buffer_cursor_line)
|
|
|
|
|
|
def _get_font(self):
|
|
|
""" The base font being used by the ConsoleWidget.
|
|
|
"""
|
|
|
return self.document().defaultFont()
|
|
|
|
|
|
def _set_font(self, font):
|
|
|
""" Sets the base font for the ConsoleWidget to the specified QFont.
|
|
|
"""
|
|
|
self._completion_widget.setFont(font)
|
|
|
self.document().setDefaultFont(font)
|
|
|
|
|
|
font = property(_get_font, _set_font)
|
|
|
|
|
|
def reset_font(self):
|
|
|
""" Sets the font to the default fixed-width font for this platform.
|
|
|
"""
|
|
|
if sys.platform == 'win32':
|
|
|
name = 'Courier'
|
|
|
elif sys.platform == 'darwin':
|
|
|
name = 'Monaco'
|
|
|
else:
|
|
|
name = 'Monospace'
|
|
|
font = QtGui.QFont(name, QtGui.qApp.font().pointSize())
|
|
|
font.setStyleHint(QtGui.QFont.TypeWriter)
|
|
|
self._set_font(font)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _execute(self, interactive):
|
|
|
""" Called to execute the input buffer. When triggered by an the enter
|
|
|
key press, 'interactive' is True; otherwise, it is False. Returns
|
|
|
whether the input buffer was completely processed and a new prompt
|
|
|
created.
|
|
|
"""
|
|
|
raise NotImplementedError
|
|
|
|
|
|
def _prompt_started_hook(self):
|
|
|
""" Called immediately after a new prompt is displayed.
|
|
|
"""
|
|
|
pass
|
|
|
|
|
|
def _prompt_finished_hook(self):
|
|
|
""" Called immediately after a prompt is finished, i.e. when some input
|
|
|
will be processed and a new prompt displayed.
|
|
|
"""
|
|
|
pass
|
|
|
|
|
|
def _up_pressed(self):
|
|
|
""" Called when the up key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
return True
|
|
|
|
|
|
def _down_pressed(self):
|
|
|
""" Called when the down key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
return True
|
|
|
|
|
|
def _tab_pressed(self):
|
|
|
""" Called when the tab key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
return False
|
|
|
|
|
|
#--------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' protected interface
|
|
|
#--------------------------------------------------------------------------
|
|
|
|
|
|
def _control_down(self, modifiers):
|
|
|
""" Given a KeyboardModifiers flags object, return whether the Control
|
|
|
key is down (on Mac OS, treat the Command key as a synonym for
|
|
|
Control).
|
|
|
"""
|
|
|
down = bool(modifiers & QtCore.Qt.ControlModifier)
|
|
|
|
|
|
# Note: on Mac OS, ControlModifier corresponds to the Command key while
|
|
|
# MetaModifier corresponds to the Control key.
|
|
|
if sys.platform == 'darwin':
|
|
|
down = down ^ bool(modifiers & QtCore.Qt.MetaModifier)
|
|
|
|
|
|
return down
|
|
|
|
|
|
def _complete_with_items(self, cursor, items):
|
|
|
""" Performs completion with 'items' at the specified cursor location.
|
|
|
"""
|
|
|
if len(items) == 1:
|
|
|
cursor.setPosition(self.textCursor().position(),
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.insertText(items[0])
|
|
|
elif len(items) > 1:
|
|
|
if self.gui_completion:
|
|
|
self._completion_widget.show_items(cursor, items)
|
|
|
else:
|
|
|
text = '\n'.join(items) + '\n'
|
|
|
self._write_text_keeping_prompt(text)
|
|
|
|
|
|
def _get_end_cursor(self):
|
|
|
""" Convenience method that returns a cursor for the last character.
|
|
|
"""
|
|
|
cursor = self.textCursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.End)
|
|
|
return cursor
|
|
|
|
|
|
def _get_prompt_cursor(self):
|
|
|
""" Convenience method that returns a cursor for the prompt position.
|
|
|
"""
|
|
|
cursor = self.textCursor()
|
|
|
cursor.setPosition(self._prompt_pos)
|
|
|
return cursor
|
|
|
|
|
|
def _get_selection_cursor(self, start, end):
|
|
|
""" Convenience method that returns a cursor with text selected between
|
|
|
the positions 'start' and 'end'.
|
|
|
"""
|
|
|
cursor = self.textCursor()
|
|
|
cursor.setPosition(start)
|
|
|
cursor.setPosition(end, QtGui.QTextCursor.KeepAnchor)
|
|
|
return cursor
|
|
|
|
|
|
def _get_word_start_cursor(self, position):
|
|
|
""" Find the start of the word to the left the given position. If a
|
|
|
sequence of non-word characters precedes the first word, skip over
|
|
|
them. (This emulates the behavior of bash, emacs, etc.)
|
|
|
"""
|
|
|
document = self.document()
|
|
|
position -= 1
|
|
|
while self._in_buffer(position) and \
|
|
|
not document.characterAt(position).isLetterOrNumber():
|
|
|
position -= 1
|
|
|
while self._in_buffer(position) and \
|
|
|
document.characterAt(position).isLetterOrNumber():
|
|
|
position -= 1
|
|
|
cursor = self.textCursor()
|
|
|
cursor.setPosition(position + 1)
|
|
|
return cursor
|
|
|
|
|
|
def _get_word_end_cursor(self, position):
|
|
|
""" Find the end of the word to the right the given position. If a
|
|
|
sequence of non-word characters precedes the first word, skip over
|
|
|
them. (This emulates the behavior of bash, emacs, etc.)
|
|
|
"""
|
|
|
document = self.document()
|
|
|
end = self._get_end_cursor().position()
|
|
|
while position < end and \
|
|
|
not document.characterAt(position).isLetterOrNumber():
|
|
|
position += 1
|
|
|
while position < end and \
|
|
|
document.characterAt(position).isLetterOrNumber():
|
|
|
position += 1
|
|
|
cursor = self.textCursor()
|
|
|
cursor.setPosition(position)
|
|
|
return cursor
|
|
|
|
|
|
def _prompt_started(self):
|
|
|
""" Called immediately after a new prompt is displayed.
|
|
|
"""
|
|
|
# Temporarily disable the maximum block count to permit undo/redo.
|
|
|
self.setMaximumBlockCount(0)
|
|
|
self.setUndoRedoEnabled(True)
|
|
|
|
|
|
self.setReadOnly(False)
|
|
|
self.moveCursor(QtGui.QTextCursor.End)
|
|
|
self.centerCursor()
|
|
|
|
|
|
self._executing = False
|
|
|
self._prompt_started_hook()
|
|
|
|
|
|
def _prompt_finished(self):
|
|
|
""" Called immediately after a prompt is finished, i.e. when some input
|
|
|
will be processed and a new prompt displayed.
|
|
|
"""
|
|
|
# This has the (desired) side effect of disabling the undo/redo history.
|
|
|
self.setMaximumBlockCount(self.buffer_size)
|
|
|
|
|
|
self.setReadOnly(True)
|
|
|
self._prompt_finished_hook()
|
|
|
|
|
|
def _set_position(self, position):
|
|
|
""" Convenience method to set the position of the cursor.
|
|
|
"""
|
|
|
cursor = self.textCursor()
|
|
|
cursor.setPosition(position)
|
|
|
self.setTextCursor(cursor)
|
|
|
|
|
|
def _set_selection(self, start, end):
|
|
|
""" Convenience method to set the current selected text.
|
|
|
"""
|
|
|
self.setTextCursor(self._get_selection_cursor(start, end))
|
|
|
|
|
|
def _show_prompt(self, prompt=None):
|
|
|
""" Writes a new prompt at the end of the buffer. If 'prompt' is not
|
|
|
specified, uses the previous prompt.
|
|
|
"""
|
|
|
if prompt is not None:
|
|
|
self._prompt = prompt
|
|
|
self.appendPlainText('\n' + self._prompt)
|
|
|
self._prompt_pos = self._get_end_cursor().position()
|
|
|
self._prompt_started()
|
|
|
|
|
|
def _show_continuation_prompt(self):
|
|
|
""" Writes a new continuation prompt at the end of the buffer.
|
|
|
"""
|
|
|
self.appendPlainText(self._continuation_prompt)
|
|
|
self._prompt_started()
|
|
|
|
|
|
def _write_text_keeping_prompt(self, text):
|
|
|
""" Writes 'text' after the current prompt, then restores the old prompt
|
|
|
with its old input buffer.
|
|
|
"""
|
|
|
input_buffer = self.input_buffer
|
|
|
self.appendPlainText('\n')
|
|
|
self._prompt_finished()
|
|
|
|
|
|
self.appendPlainText(text)
|
|
|
self._show_prompt()
|
|
|
self.input_buffer = input_buffer
|
|
|
|
|
|
def _in_buffer(self, position):
|
|
|
""" Returns whether the given position is inside the editing region.
|
|
|
"""
|
|
|
return position >= self._prompt_pos
|
|
|
|
|
|
def _keep_cursor_in_buffer(self):
|
|
|
""" Ensures that the cursor is inside the editing region. Returns
|
|
|
whether the cursor was moved.
|
|
|
"""
|
|
|
cursor = self.textCursor()
|
|
|
if cursor.position() < self._prompt_pos:
|
|
|
cursor.movePosition(QtGui.QTextCursor.End)
|
|
|
self.setTextCursor(cursor)
|
|
|
return True
|
|
|
else:
|
|
|
return False
|
|
|
|
|
|
|
|
|
class HistoryConsoleWidget(ConsoleWidget):
|
|
|
""" A ConsoleWidget that keeps a history of the commands that have been
|
|
|
executed.
|
|
|
"""
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'QObject' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, parent=None):
|
|
|
super(HistoryConsoleWidget, self).__init__(parent)
|
|
|
|
|
|
self._history = []
|
|
|
self._history_index = 0
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def execute(self, interactive=False):
|
|
|
""" Reimplemented to the store history.
|
|
|
"""
|
|
|
stripped = self.input_buffer.rstrip()
|
|
|
executed = super(HistoryConsoleWidget, self).execute(interactive)
|
|
|
if executed:
|
|
|
self._history.append(stripped)
|
|
|
self._history_index = len(self._history)
|
|
|
return executed
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _up_pressed(self):
|
|
|
""" Called when the up key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
prompt_cursor = self._get_prompt_cursor()
|
|
|
if self.textCursor().blockNumber() == prompt_cursor.blockNumber():
|
|
|
self.history_previous()
|
|
|
|
|
|
# Go to the first line of prompt for seemless history scrolling.
|
|
|
cursor = self._get_prompt_cursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.EndOfLine)
|
|
|
self.setTextCursor(cursor)
|
|
|
|
|
|
return False
|
|
|
return True
|
|
|
|
|
|
def _down_pressed(self):
|
|
|
""" Called when the down key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
end_cursor = self._get_end_cursor()
|
|
|
if self.textCursor().blockNumber() == end_cursor.blockNumber():
|
|
|
self.history_next()
|
|
|
return False
|
|
|
return True
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'HistoryConsoleWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def history_previous(self):
|
|
|
""" If possible, set the input buffer to the previous item in the
|
|
|
history.
|
|
|
"""
|
|
|
if self._history_index > 0:
|
|
|
self._history_index -= 1
|
|
|
self.input_buffer = self._history[self._history_index]
|
|
|
|
|
|
def history_next(self):
|
|
|
""" Set the input buffer to the next item in the history, or a blank
|
|
|
line if there is no subsequent item.
|
|
|
"""
|
|
|
if self._history_index < len(self._history):
|
|
|
self._history_index += 1
|
|
|
if self._history_index < len(self._history):
|
|
|
self.input_buffer = self._history[self._history_index]
|
|
|
else:
|
|
|
self.input_buffer = ''
|
|
|
|
