|
|
""" An abstract base class for console-type widgets.
|
|
|
"""
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Imports
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
# Standard library imports
|
|
|
import os
|
|
|
from os.path import commonprefix
|
|
|
import re
|
|
|
import sys
|
|
|
from textwrap import dedent
|
|
|
from unicodedata import category
|
|
|
|
|
|
# System library imports
|
|
|
from IPython.external.qt import QtCore, QtGui
|
|
|
|
|
|
# Local imports
|
|
|
from IPython.config.configurable import LoggingConfigurable
|
|
|
from IPython.frontend.qt.rich_text import HtmlExporter
|
|
|
from IPython.frontend.qt.util import MetaQObjectHasTraits, get_font
|
|
|
from IPython.utils.text import columnize
|
|
|
from IPython.utils.traitlets import Bool, Enum, Integer, Unicode
|
|
|
from ansi_code_processor import QtAnsiCodeProcessor
|
|
|
from completion_widget import CompletionWidget
|
|
|
from kill_ring import QtKillRing
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Functions
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
def is_letter_or_number(char):
|
|
|
""" Returns whether the specified unicode character is a letter or a number.
|
|
|
"""
|
|
|
cat = category(char)
|
|
|
return cat.startswith('L') or cat.startswith('N')
|
|
|
|
|
|
#-----------------------------------------------------------------------------
|
|
|
# Classes
|
|
|
#-----------------------------------------------------------------------------
|
|
|
|
|
|
class ConsoleWidget(LoggingConfigurable, QtGui.QWidget):
|
|
|
""" An abstract base class for console-type widgets. This class has
|
|
|
functionality for:
|
|
|
|
|
|
* Maintaining a prompt and editing region
|
|
|
* Providing the traditional Unix-style console keyboard shortcuts
|
|
|
* Performing tab completion
|
|
|
* Paging text
|
|
|
* Handling ANSI escape codes
|
|
|
|
|
|
ConsoleWidget also provides a number of utility methods that will be
|
|
|
convenient to implementors of a console-style widget.
|
|
|
"""
|
|
|
__metaclass__ = MetaQObjectHasTraits
|
|
|
|
|
|
#------ Configuration ------------------------------------------------------
|
|
|
|
|
|
ansi_codes = Bool(True, config=True,
|
|
|
help="Whether to process ANSI escape codes."
|
|
|
)
|
|
|
buffer_size = Integer(500, config=True,
|
|
|
help="""
|
|
|
The maximum number of lines of text before truncation. Specifying a
|
|
|
non-positive number disables text truncation (not recommended).
|
|
|
"""
|
|
|
)
|
|
|
gui_completion = Bool(False, config=True,
|
|
|
help="""
|
|
|
Use a list widget instead of plain text output for tab completion.
|
|
|
"""
|
|
|
)
|
|
|
# NOTE: this value can only be specified during initialization.
|
|
|
kind = Enum(['plain', 'rich'], default_value='plain', config=True,
|
|
|
help="""
|
|
|
The type of underlying text widget to use. Valid values are 'plain',
|
|
|
which specifies a QPlainTextEdit, and 'rich', which specifies a
|
|
|
QTextEdit.
|
|
|
"""
|
|
|
)
|
|
|
# NOTE: this value can only be specified during initialization.
|
|
|
paging = Enum(['inside', 'hsplit', 'vsplit', 'custom', 'none'],
|
|
|
default_value='inside', config=True,
|
|
|
help="""
|
|
|
The type of paging to use. Valid values are:
|
|
|
|
|
|
'inside' : The widget pages like a traditional terminal.
|
|
|
'hsplit' : When paging is requested, the widget is split
|
|
|
horizontally. The top pane contains the console, and the
|
|
|
bottom pane contains the paged text.
|
|
|
'vsplit' : Similar to 'hsplit', except that a vertical splitter
|
|
|
used.
|
|
|
'custom' : No action is taken by the widget beyond emitting a
|
|
|
'custom_page_requested(str)' signal.
|
|
|
'none' : The text is written directly to the console.
|
|
|
""")
|
|
|
|
|
|
font_family = Unicode(config=True,
|
|
|
help="""The font family to use for the console.
|
|
|
On OSX this defaults to Monaco, on Windows the default is
|
|
|
Consolas with fallback of Courier, and on other platforms
|
|
|
the default is Monospace.
|
|
|
""")
|
|
|
def _font_family_default(self):
|
|
|
if sys.platform == 'win32':
|
|
|
# Consolas ships with Vista/Win7, fallback to Courier if needed
|
|
|
return 'Consolas'
|
|
|
elif sys.platform == 'darwin':
|
|
|
# OSX always has Monaco, no need for a fallback
|
|
|
return 'Monaco'
|
|
|
else:
|
|
|
# Monospace should always exist, no need for a fallback
|
|
|
return 'Monospace'
|
|
|
|
|
|
font_size = Integer(config=True,
|
|
|
help="""The font size. If unconfigured, Qt will be entrusted
|
|
|
with the size of the font.
|
|
|
""")
|
|
|
|
|
|
# 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 = Bool(False)
|
|
|
|
|
|
#------ Signals ------------------------------------------------------------
|
|
|
|
|
|
# Signals that indicate ConsoleWidget state.
|
|
|
copy_available = QtCore.Signal(bool)
|
|
|
redo_available = QtCore.Signal(bool)
|
|
|
undo_available = QtCore.Signal(bool)
|
|
|
|
|
|
# Signal emitted when paging is needed and the paging style has been
|
|
|
# specified as 'custom'.
|
|
|
custom_page_requested = QtCore.Signal(object)
|
|
|
|
|
|
# Signal emitted when the font is changed.
|
|
|
font_changed = QtCore.Signal(QtGui.QFont)
|
|
|
|
|
|
#------ Protected class variables ------------------------------------------
|
|
|
|
|
|
# control handles
|
|
|
_control = None
|
|
|
_page_control = None
|
|
|
_splitter = None
|
|
|
|
|
|
# When the control key is down, these keys are mapped.
|
|
|
_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_P : QtCore.Qt.Key_Up,
|
|
|
QtCore.Qt.Key_N : QtCore.Qt.Key_Down,
|
|
|
QtCore.Qt.Key_H : QtCore.Qt.Key_Backspace, }
|
|
|
if not sys.platform == 'darwin':
|
|
|
# On OS X, Ctrl-E already does the right thing, whereas End moves the
|
|
|
# cursor to the bottom of the buffer.
|
|
|
_ctrl_down_remap[QtCore.Qt.Key_E] = QtCore.Qt.Key_End
|
|
|
|
|
|
# The shortcuts defined by this widget. We need to keep track of these to
|
|
|
# support 'override_shortcuts' above.
|
|
|
_shortcuts = set(_ctrl_down_remap.keys() +
|
|
|
[ QtCore.Qt.Key_C, QtCore.Qt.Key_G, QtCore.Qt.Key_O,
|
|
|
QtCore.Qt.Key_V ])
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'QObject' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def __init__(self, parent=None, **kw):
|
|
|
""" Create a ConsoleWidget.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
parent : QWidget, optional [default None]
|
|
|
The parent for this widget.
|
|
|
"""
|
|
|
QtGui.QWidget.__init__(self, parent)
|
|
|
LoggingConfigurable.__init__(self, **kw)
|
|
|
|
|
|
# While scrolling the pager on Mac OS X, it tears badly. The
|
|
|
# NativeGesture is platform and perhaps build-specific hence
|
|
|
# we take adequate precautions here.
|
|
|
self._pager_scroll_events = [QtCore.QEvent.Wheel]
|
|
|
if hasattr(QtCore.QEvent, 'NativeGesture'):
|
|
|
self._pager_scroll_events.append(QtCore.QEvent.NativeGesture)
|
|
|
|
|
|
# Create the layout and underlying text widget.
|
|
|
layout = QtGui.QStackedLayout(self)
|
|
|
layout.setContentsMargins(0, 0, 0, 0)
|
|
|
self._control = self._create_control()
|
|
|
if self.paging in ('hsplit', 'vsplit'):
|
|
|
self._splitter = QtGui.QSplitter()
|
|
|
if self.paging == 'hsplit':
|
|
|
self._splitter.setOrientation(QtCore.Qt.Horizontal)
|
|
|
else:
|
|
|
self._splitter.setOrientation(QtCore.Qt.Vertical)
|
|
|
self._splitter.addWidget(self._control)
|
|
|
layout.addWidget(self._splitter)
|
|
|
else:
|
|
|
layout.addWidget(self._control)
|
|
|
|
|
|
# Create the paging widget, if necessary.
|
|
|
if self.paging in ('inside', 'hsplit', 'vsplit'):
|
|
|
self._page_control = self._create_page_control()
|
|
|
if self._splitter:
|
|
|
self._page_control.hide()
|
|
|
self._splitter.addWidget(self._page_control)
|
|
|
else:
|
|
|
layout.addWidget(self._page_control)
|
|
|
|
|
|
# Initialize protected variables. Some variables contain useful state
|
|
|
# information for subclasses; they should be considered read-only.
|
|
|
self._append_before_prompt_pos = 0
|
|
|
self._ansi_processor = QtAnsiCodeProcessor()
|
|
|
self._completion_widget = CompletionWidget(self._control)
|
|
|
self._continuation_prompt = '> '
|
|
|
self._continuation_prompt_html = None
|
|
|
self._executing = False
|
|
|
self._filter_drag = False
|
|
|
self._filter_resize = False
|
|
|
self._html_exporter = HtmlExporter(self._control)
|
|
|
self._input_buffer_executing = ''
|
|
|
self._input_buffer_pending = ''
|
|
|
self._kill_ring = QtKillRing(self._control)
|
|
|
self._prompt = ''
|
|
|
self._prompt_html = None
|
|
|
self._prompt_pos = 0
|
|
|
self._prompt_sep = ''
|
|
|
self._reading = False
|
|
|
self._reading_callback = None
|
|
|
self._tab_width = 8
|
|
|
self._text_completing_pos = 0
|
|
|
|
|
|
# Set a monospaced font.
|
|
|
self.reset_font()
|
|
|
|
|
|
# Configure actions.
|
|
|
action = QtGui.QAction('Print', None)
|
|
|
action.setEnabled(True)
|
|
|
printkey = QtGui.QKeySequence(QtGui.QKeySequence.Print)
|
|
|
if printkey.matches("Ctrl+P") and sys.platform != 'darwin':
|
|
|
# Only override the default if there is a collision.
|
|
|
# Qt ctrl = cmd on OSX, so the match gets a false positive on OSX.
|
|
|
printkey = "Ctrl+Shift+P"
|
|
|
action.setShortcut(printkey)
|
|
|
action.setShortcutContext(QtCore.Qt.WidgetWithChildrenShortcut)
|
|
|
action.triggered.connect(self.print_)
|
|
|
self.addAction(action)
|
|
|
self.print_action = action
|
|
|
|
|
|
action = QtGui.QAction('Save as HTML/XML', None)
|
|
|
action.setShortcut(QtGui.QKeySequence.Save)
|
|
|
action.setShortcutContext(QtCore.Qt.WidgetWithChildrenShortcut)
|
|
|
action.triggered.connect(self.export_html)
|
|
|
self.addAction(action)
|
|
|
self.export_action = action
|
|
|
|
|
|
action = QtGui.QAction('Select All', None)
|
|
|
action.setEnabled(True)
|
|
|
selectall = QtGui.QKeySequence(QtGui.QKeySequence.SelectAll)
|
|
|
if selectall.matches("Ctrl+A") and sys.platform != 'darwin':
|
|
|
# Only override the default if there is a collision.
|
|
|
# Qt ctrl = cmd on OSX, so the match gets a false positive on OSX.
|
|
|
selectall = "Ctrl+Shift+A"
|
|
|
action.setShortcut(selectall)
|
|
|
action.setShortcutContext(QtCore.Qt.WidgetWithChildrenShortcut)
|
|
|
action.triggered.connect(self.select_all)
|
|
|
self.addAction(action)
|
|
|
self.select_all_action = action
|
|
|
|
|
|
self.increase_font_size = QtGui.QAction("Bigger Font",
|
|
|
self,
|
|
|
shortcut=QtGui.QKeySequence.ZoomIn,
|
|
|
shortcutContext=QtCore.Qt.WidgetWithChildrenShortcut,
|
|
|
statusTip="Increase the font size by one point",
|
|
|
triggered=self._increase_font_size)
|
|
|
self.addAction(self.increase_font_size)
|
|
|
|
|
|
self.decrease_font_size = QtGui.QAction("Smaller Font",
|
|
|
self,
|
|
|
shortcut=QtGui.QKeySequence.ZoomOut,
|
|
|
shortcutContext=QtCore.Qt.WidgetWithChildrenShortcut,
|
|
|
statusTip="Decrease the font size by one point",
|
|
|
triggered=self._decrease_font_size)
|
|
|
self.addAction(self.decrease_font_size)
|
|
|
|
|
|
self.reset_font_size = QtGui.QAction("Normal Font",
|
|
|
self,
|
|
|
shortcut="Ctrl+0",
|
|
|
shortcutContext=QtCore.Qt.WidgetWithChildrenShortcut,
|
|
|
statusTip="Restore the Normal font size",
|
|
|
triggered=self.reset_font)
|
|
|
self.addAction(self.reset_font_size)
|
|
|
|
|
|
|
|
|
|
|
|
def eventFilter(self, obj, event):
|
|
|
""" Reimplemented to ensure a console-like behavior in the underlying
|
|
|
text widgets.
|
|
|
"""
|
|
|
etype = event.type()
|
|
|
if etype == QtCore.QEvent.KeyPress:
|
|
|
|
|
|
# Re-map keys for all filtered widgets.
|
|
|
key = event.key()
|
|
|
if self._control_key_down(event.modifiers()) and \
|
|
|
key in self._ctrl_down_remap:
|
|
|
new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,
|
|
|
self._ctrl_down_remap[key],
|
|
|
QtCore.Qt.NoModifier)
|
|
|
QtGui.qApp.sendEvent(obj, new_event)
|
|
|
return True
|
|
|
|
|
|
elif obj == self._control:
|
|
|
return self._event_filter_console_keypress(event)
|
|
|
|
|
|
elif obj == self._page_control:
|
|
|
return self._event_filter_page_keypress(event)
|
|
|
|
|
|
# Make middle-click paste safe.
|
|
|
elif etype == QtCore.QEvent.MouseButtonRelease and \
|
|
|
event.button() == QtCore.Qt.MidButton and \
|
|
|
obj == self._control.viewport():
|
|
|
cursor = self._control.cursorForPosition(event.pos())
|
|
|
self._control.setTextCursor(cursor)
|
|
|
self.paste(QtGui.QClipboard.Selection)
|
|
|
return True
|
|
|
|
|
|
# Manually adjust the scrollbars *after* a resize event is dispatched.
|
|
|
elif etype == QtCore.QEvent.Resize and not self._filter_resize:
|
|
|
self._filter_resize = True
|
|
|
QtGui.qApp.sendEvent(obj, event)
|
|
|
self._adjust_scrollbars()
|
|
|
self._filter_resize = False
|
|
|
return True
|
|
|
|
|
|
# Override shortcuts for all filtered widgets.
|
|
|
elif etype == QtCore.QEvent.ShortcutOverride and \
|
|
|
self.override_shortcuts and \
|
|
|
self._control_key_down(event.modifiers()) and \
|
|
|
event.key() in self._shortcuts:
|
|
|
event.accept()
|
|
|
|
|
|
# Ensure that drags are safe. The problem is that the drag starting
|
|
|
# logic, which determines whether the drag is a Copy or Move, is locked
|
|
|
# down in QTextControl. If the widget is editable, which it must be if
|
|
|
# we're not executing, the drag will be a Move. The following hack
|
|
|
# prevents QTextControl from deleting the text by clearing the selection
|
|
|
# when a drag leave event originating from this widget is dispatched.
|
|
|
# The fact that we have to clear the user's selection is unfortunate,
|
|
|
# but the alternative--trying to prevent Qt from using its hardwired
|
|
|
# drag logic and writing our own--is worse.
|
|
|
elif etype == QtCore.QEvent.DragEnter and \
|
|
|
obj == self._control.viewport() and \
|
|
|
event.source() == self._control.viewport():
|
|
|
self._filter_drag = True
|
|
|
elif etype == QtCore.QEvent.DragLeave and \
|
|
|
obj == self._control.viewport() and \
|
|
|
self._filter_drag:
|
|
|
cursor = self._control.textCursor()
|
|
|
cursor.clearSelection()
|
|
|
self._control.setTextCursor(cursor)
|
|
|
self._filter_drag = False
|
|
|
|
|
|
# Ensure that drops are safe.
|
|
|
elif etype == QtCore.QEvent.Drop and obj == self._control.viewport():
|
|
|
cursor = self._control.cursorForPosition(event.pos())
|
|
|
if self._in_buffer(cursor.position()):
|
|
|
text = event.mimeData().text()
|
|
|
self._insert_plain_text_into_buffer(cursor, text)
|
|
|
|
|
|
# Qt is expecting to get something here--drag and drop occurs in its
|
|
|
# own event loop. Send a DragLeave event to end it.
|
|
|
QtGui.qApp.sendEvent(obj, QtGui.QDragLeaveEvent())
|
|
|
return True
|
|
|
|
|
|
# Handle scrolling of the vsplit pager. This hack attempts to solve
|
|
|
# problems with tearing of the help text inside the pager window. This
|
|
|
# happens only on Mac OS X with both PySide and PyQt. This fix isn't
|
|
|
# perfect but makes the pager more usable.
|
|
|
elif etype in self._pager_scroll_events and \
|
|
|
obj == self._page_control:
|
|
|
self._page_control.repaint()
|
|
|
return True
|
|
|
return super(ConsoleWidget, self).eventFilter(obj, event)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'QWidget' interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def sizeHint(self):
|
|
|
""" Reimplemented to suggest a size that is 80 characters wide and
|
|
|
25 lines high.
|
|
|
"""
|
|
|
font_metrics = QtGui.QFontMetrics(self.font)
|
|
|
margin = (self._control.frameWidth() +
|
|
|
self._control.document().documentMargin()) * 2
|
|
|
style = self.style()
|
|
|
splitwidth = style.pixelMetric(QtGui.QStyle.PM_SplitterWidth)
|
|
|
|
|
|
# Note 1: Despite my best efforts to take the various margins into
|
|
|
# account, the width is still coming out a bit too small, so we include
|
|
|
# a fudge factor of one character here.
|
|
|
# Note 2: QFontMetrics.maxWidth is not used here or anywhere else due
|
|
|
# to a Qt bug on certain Mac OS systems where it returns 0.
|
|
|
width = font_metrics.width(' ') * 81 + margin
|
|
|
width += style.pixelMetric(QtGui.QStyle.PM_ScrollBarExtent)
|
|
|
if self.paging == 'hsplit':
|
|
|
width = width * 2 + splitwidth
|
|
|
|
|
|
height = font_metrics.height() * 25 + margin
|
|
|
if self.paging == 'vsplit':
|
|
|
height = height * 2 + splitwidth
|
|
|
|
|
|
return QtCore.QSize(width, height)
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' public interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def can_copy(self):
|
|
|
""" Returns whether text can be copied to the clipboard.
|
|
|
"""
|
|
|
return self._control.textCursor().hasSelection()
|
|
|
|
|
|
def can_cut(self):
|
|
|
""" Returns whether text can be cut to the clipboard.
|
|
|
"""
|
|
|
cursor = self._control.textCursor()
|
|
|
return (cursor.hasSelection() and
|
|
|
self._in_buffer(cursor.anchor()) and
|
|
|
self._in_buffer(cursor.position()))
|
|
|
|
|
|
def can_paste(self):
|
|
|
""" Returns whether text can be pasted from the clipboard.
|
|
|
"""
|
|
|
if self._control.textInteractionFlags() & QtCore.Qt.TextEditable:
|
|
|
return bool(QtGui.QApplication.clipboard().text())
|
|
|
return False
|
|
|
|
|
|
def clear(self, keep_input=True):
|
|
|
""" Clear the console.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
keep_input : bool, optional (default True)
|
|
|
If set, restores the old input buffer if a new prompt is written.
|
|
|
"""
|
|
|
if self._executing:
|
|
|
self._control.clear()
|
|
|
else:
|
|
|
if keep_input:
|
|
|
input_buffer = self.input_buffer
|
|
|
self._control.clear()
|
|
|
self._show_prompt()
|
|
|
if keep_input:
|
|
|
self.input_buffer = input_buffer
|
|
|
|
|
|
def copy(self):
|
|
|
""" Copy the currently selected text to the clipboard.
|
|
|
"""
|
|
|
self.layout().currentWidget().copy()
|
|
|
|
|
|
def cut(self):
|
|
|
""" Copy the currently selected text to the clipboard and delete it
|
|
|
if it's inside the input buffer.
|
|
|
"""
|
|
|
self.copy()
|
|
|
if self.can_cut():
|
|
|
self._control.textCursor().removeSelectedText()
|
|
|
|
|
|
def execute(self, source=None, hidden=False, interactive=False):
|
|
|
""" Executes source or the input buffer, possibly prompting for more
|
|
|
input.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
source : str, optional
|
|
|
|
|
|
The source to execute. If not specified, the input buffer will be
|
|
|
used. If specified and 'hidden' is False, the input buffer will be
|
|
|
replaced with the source before execution.
|
|
|
|
|
|
hidden : bool, optional (default False)
|
|
|
|
|
|
If set, no output will be shown and the prompt will not be modified.
|
|
|
In other words, it will be completely invisible to the user that
|
|
|
an execution has occurred.
|
|
|
|
|
|
interactive : bool, optional (default False)
|
|
|
|
|
|
Whether the console is to treat the source as having been manually
|
|
|
entered by the user. The effect of this parameter depends on the
|
|
|
subclass implementation.
|
|
|
|
|
|
Raises:
|
|
|
-------
|
|
|
RuntimeError
|
|
|
If incomplete input is given and 'hidden' is True. In this case,
|
|
|
it is not possible to prompt for more input.
|
|
|
|
|
|
Returns:
|
|
|
--------
|
|
|
A boolean indicating whether the source was executed.
|
|
|
"""
|
|
|
# WARNING: The order in which things happen here is very particular, in
|
|
|
# large part because our syntax highlighting is fragile. If you change
|
|
|
# something, test carefully!
|
|
|
|
|
|
# Decide what to execute.
|
|
|
if source is None:
|
|
|
source = self.input_buffer
|
|
|
if not hidden:
|
|
|
# A newline is appended later, but it should be considered part
|
|
|
# of the input buffer.
|
|
|
source += '\n'
|
|
|
elif not hidden:
|
|
|
self.input_buffer = source
|
|
|
|
|
|
# Execute the source or show a continuation prompt if it is incomplete.
|
|
|
complete = self._is_complete(source, interactive)
|
|
|
if hidden:
|
|
|
if complete:
|
|
|
self._execute(source, hidden)
|
|
|
else:
|
|
|
error = 'Incomplete noninteractive input: "%s"'
|
|
|
raise RuntimeError(error % source)
|
|
|
else:
|
|
|
if complete:
|
|
|
self._append_plain_text('\n')
|
|
|
self._input_buffer_executing = self.input_buffer
|
|
|
self._executing = True
|
|
|
self._prompt_finished()
|
|
|
|
|
|
# The maximum block count is only in effect during execution.
|
|
|
# This ensures that _prompt_pos does not become invalid due to
|
|
|
# text truncation.
|
|
|
self._control.document().setMaximumBlockCount(self.buffer_size)
|
|
|
|
|
|
# Setting a positive maximum block count will automatically
|
|
|
# disable the undo/redo history, but just to be safe:
|
|
|
self._control.setUndoRedoEnabled(False)
|
|
|
|
|
|
# Perform actual execution.
|
|
|
self._execute(source, hidden)
|
|
|
|
|
|
else:
|
|
|
# Do this inside an edit block so continuation prompts are
|
|
|
# removed seamlessly via undo/redo.
|
|
|
cursor = self._get_end_cursor()
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.insertText('\n')
|
|
|
self._insert_continuation_prompt(cursor)
|
|
|
cursor.endEditBlock()
|
|
|
|
|
|
# Do not do this inside the edit block. It works as expected
|
|
|
# when using a QPlainTextEdit control, but does not have an
|
|
|
# effect when using a QTextEdit. I believe this is a Qt bug.
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
|
|
|
return complete
|
|
|
|
|
|
def export_html(self):
|
|
|
""" Shows a dialog to export HTML/XML in various formats.
|
|
|
"""
|
|
|
self._html_exporter.export()
|
|
|
|
|
|
def _get_input_buffer(self, force=False):
|
|
|
""" The text that the user has entered entered at the current prompt.
|
|
|
|
|
|
If the console is currently executing, the text that is executing will
|
|
|
always be returned.
|
|
|
"""
|
|
|
# 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 and not force:
|
|
|
return self._input_buffer_executing
|
|
|
|
|
|
cursor = self._get_end_cursor()
|
|
|
cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor)
|
|
|
input_buffer = cursor.selection().toPlainText()
|
|
|
|
|
|
# Strip out continuation prompts.
|
|
|
return input_buffer.replace('\n' + self._continuation_prompt, '\n')
|
|
|
|
|
|
def _set_input_buffer(self, string):
|
|
|
""" Sets the text in the input buffer.
|
|
|
|
|
|
If the console is currently executing, this call has no *immediate*
|
|
|
effect. When the execution is finished, the input buffer will be updated
|
|
|
appropriately.
|
|
|
"""
|
|
|
# If we're executing, store the text for later.
|
|
|
if self._executing:
|
|
|
self._input_buffer_pending = string
|
|
|
return
|
|
|
|
|
|
# Remove old text.
|
|
|
cursor = self._get_end_cursor()
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.setPosition(self._prompt_pos, QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
|
|
|
# Insert new text with continuation prompts.
|
|
|
self._insert_plain_text_into_buffer(self._get_prompt_cursor(), string)
|
|
|
cursor.endEditBlock()
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
|
|
|
input_buffer = property(_get_input_buffer, _set_input_buffer)
|
|
|
|
|
|
def _get_font(self):
|
|
|
""" The base font being used by the ConsoleWidget.
|
|
|
"""
|
|
|
return self._control.document().defaultFont()
|
|
|
|
|
|
def _set_font(self, font):
|
|
|
""" Sets the base font for the ConsoleWidget to the specified QFont.
|
|
|
"""
|
|
|
font_metrics = QtGui.QFontMetrics(font)
|
|
|
self._control.setTabStopWidth(self.tab_width * font_metrics.width(' '))
|
|
|
|
|
|
self._completion_widget.setFont(font)
|
|
|
self._control.document().setDefaultFont(font)
|
|
|
if self._page_control:
|
|
|
self._page_control.document().setDefaultFont(font)
|
|
|
|
|
|
self.font_changed.emit(font)
|
|
|
|
|
|
font = property(_get_font, _set_font)
|
|
|
|
|
|
def paste(self, mode=QtGui.QClipboard.Clipboard):
|
|
|
""" Paste the contents of the clipboard into the input region.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
mode : QClipboard::Mode, optional [default QClipboard::Clipboard]
|
|
|
|
|
|
Controls which part of the system clipboard is used. This can be
|
|
|
used to access the selection clipboard in X11 and the Find buffer
|
|
|
in Mac OS. By default, the regular clipboard is used.
|
|
|
"""
|
|
|
if self._control.textInteractionFlags() & QtCore.Qt.TextEditable:
|
|
|
# Make sure the paste is safe.
|
|
|
self._keep_cursor_in_buffer()
|
|
|
cursor = self._control.textCursor()
|
|
|
|
|
|
# Remove any trailing newline, which confuses the GUI and forces the
|
|
|
# user to backspace.
|
|
|
text = QtGui.QApplication.clipboard().text(mode).rstrip()
|
|
|
self._insert_plain_text_into_buffer(cursor, dedent(text))
|
|
|
|
|
|
def print_(self, printer = None):
|
|
|
""" Print the contents of the ConsoleWidget to the specified QPrinter.
|
|
|
"""
|
|
|
if (not printer):
|
|
|
printer = QtGui.QPrinter()
|
|
|
if(QtGui.QPrintDialog(printer).exec_() != QtGui.QDialog.Accepted):
|
|
|
return
|
|
|
self._control.print_(printer)
|
|
|
|
|
|
def prompt_to_top(self):
|
|
|
""" Moves the prompt to the top of the viewport.
|
|
|
"""
|
|
|
if not self._executing:
|
|
|
prompt_cursor = self._get_prompt_cursor()
|
|
|
if self._get_cursor().blockNumber() < prompt_cursor.blockNumber():
|
|
|
self._set_cursor(prompt_cursor)
|
|
|
self._set_top_cursor(prompt_cursor)
|
|
|
|
|
|
def redo(self):
|
|
|
""" Redo the last operation. If there is no operation to redo, nothing
|
|
|
happens.
|
|
|
"""
|
|
|
self._control.redo()
|
|
|
|
|
|
def reset_font(self):
|
|
|
""" Sets the font to the default fixed-width font for this platform.
|
|
|
"""
|
|
|
if sys.platform == 'win32':
|
|
|
# Consolas ships with Vista/Win7, fallback to Courier if needed
|
|
|
fallback = 'Courier'
|
|
|
elif sys.platform == 'darwin':
|
|
|
# OSX always has Monaco
|
|
|
fallback = 'Monaco'
|
|
|
else:
|
|
|
# Monospace should always exist
|
|
|
fallback = 'Monospace'
|
|
|
font = get_font(self.font_family, fallback)
|
|
|
if self.font_size:
|
|
|
font.setPointSize(self.font_size)
|
|
|
else:
|
|
|
font.setPointSize(QtGui.qApp.font().pointSize())
|
|
|
font.setStyleHint(QtGui.QFont.TypeWriter)
|
|
|
self._set_font(font)
|
|
|
|
|
|
def change_font_size(self, delta):
|
|
|
"""Change the font size by the specified amount (in points).
|
|
|
"""
|
|
|
font = self.font
|
|
|
size = max(font.pointSize() + delta, 1) # minimum 1 point
|
|
|
font.setPointSize(size)
|
|
|
self._set_font(font)
|
|
|
|
|
|
def _increase_font_size(self):
|
|
|
self.change_font_size(1)
|
|
|
|
|
|
def _decrease_font_size(self):
|
|
|
self.change_font_size(-1)
|
|
|
|
|
|
def select_all(self):
|
|
|
""" Selects all the text in the buffer.
|
|
|
"""
|
|
|
self._control.selectAll()
|
|
|
|
|
|
def _get_tab_width(self):
|
|
|
""" The width (in terms of space characters) for tab characters.
|
|
|
"""
|
|
|
return self._tab_width
|
|
|
|
|
|
def _set_tab_width(self, tab_width):
|
|
|
""" Sets the width (in terms of space characters) for tab characters.
|
|
|
"""
|
|
|
font_metrics = QtGui.QFontMetrics(self.font)
|
|
|
self._control.setTabStopWidth(tab_width * font_metrics.width(' '))
|
|
|
|
|
|
self._tab_width = tab_width
|
|
|
|
|
|
tab_width = property(_get_tab_width, _set_tab_width)
|
|
|
|
|
|
def undo(self):
|
|
|
""" Undo the last operation. If there is no operation to undo, nothing
|
|
|
happens.
|
|
|
"""
|
|
|
self._control.undo()
|
|
|
|
|
|
#---------------------------------------------------------------------------
|
|
|
# 'ConsoleWidget' abstract interface
|
|
|
#---------------------------------------------------------------------------
|
|
|
|
|
|
def _is_complete(self, source, interactive):
|
|
|
""" Returns whether 'source' can be executed. When triggered by an
|
|
|
Enter/Return key press, 'interactive' is True; otherwise, it is
|
|
|
False.
|
|
|
"""
|
|
|
raise NotImplementedError
|
|
|
|
|
|
def _execute(self, source, hidden):
|
|
|
""" Execute 'source'. If 'hidden', do not show any output.
|
|
|
"""
|
|
|
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, shift_modifier):
|
|
|
""" Called when the up key is pressed. Returns whether to continue
|
|
|
processing the event.
|
|
|
"""
|
|
|
return True
|
|
|
|
|
|
def _down_pressed(self, shift_modifier):
|
|
|
""" 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 _append_custom(self, insert, input, before_prompt=False):
|
|
|
""" A low-level method for appending content to the end of the buffer.
|
|
|
|
|
|
If 'before_prompt' is enabled, the content will be inserted before the
|
|
|
current prompt, if there is one.
|
|
|
"""
|
|
|
# Determine where to insert the content.
|
|
|
cursor = self._control.textCursor()
|
|
|
if before_prompt and (self._reading or not self._executing):
|
|
|
cursor.setPosition(self._append_before_prompt_pos)
|
|
|
else:
|
|
|
cursor.movePosition(QtGui.QTextCursor.End)
|
|
|
start_pos = cursor.position()
|
|
|
|
|
|
# Perform the insertion.
|
|
|
result = insert(cursor, input)
|
|
|
|
|
|
# Adjust the prompt position if we have inserted before it. This is safe
|
|
|
# because buffer truncation is disabled when not executing.
|
|
|
if before_prompt and not self._executing:
|
|
|
diff = cursor.position() - start_pos
|
|
|
self._append_before_prompt_pos += diff
|
|
|
self._prompt_pos += diff
|
|
|
|
|
|
return result
|
|
|
|
|
|
def _append_html(self, html, before_prompt=False):
|
|
|
""" Appends HTML at the end of the console buffer.
|
|
|
"""
|
|
|
self._append_custom(self._insert_html, html, before_prompt)
|
|
|
|
|
|
def _append_html_fetching_plain_text(self, html, before_prompt=False):
|
|
|
""" Appends HTML, then returns the plain text version of it.
|
|
|
"""
|
|
|
return self._append_custom(self._insert_html_fetching_plain_text,
|
|
|
html, before_prompt)
|
|
|
|
|
|
def _append_plain_text(self, text, before_prompt=False):
|
|
|
""" Appends plain text, processing ANSI codes if enabled.
|
|
|
"""
|
|
|
self._append_custom(self._insert_plain_text, text, before_prompt)
|
|
|
|
|
|
def _cancel_text_completion(self):
|
|
|
""" If text completion is progress, cancel it.
|
|
|
"""
|
|
|
if self._text_completing_pos:
|
|
|
self._clear_temporary_buffer()
|
|
|
self._text_completing_pos = 0
|
|
|
|
|
|
def _clear_temporary_buffer(self):
|
|
|
""" Clears the "temporary text" buffer, i.e. all the text following
|
|
|
the prompt region.
|
|
|
"""
|
|
|
# Select and remove all text below the input buffer.
|
|
|
cursor = self._get_prompt_cursor()
|
|
|
prompt = self._continuation_prompt.lstrip()
|
|
|
while cursor.movePosition(QtGui.QTextCursor.NextBlock):
|
|
|
temp_cursor = QtGui.QTextCursor(cursor)
|
|
|
temp_cursor.select(QtGui.QTextCursor.BlockUnderCursor)
|
|
|
text = temp_cursor.selection().toPlainText().lstrip()
|
|
|
if not text.startswith(prompt):
|
|
|
break
|
|
|
else:
|
|
|
# We've reached the end of the input buffer and no text follows.
|
|
|
return
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left) # Grab the newline.
|
|
|
cursor.movePosition(QtGui.QTextCursor.End,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
|
|
|
# After doing this, we have no choice but to clear the undo/redo
|
|
|
# history. Otherwise, the text is not "temporary" at all, because it
|
|
|
# can be recalled with undo/redo. Unfortunately, Qt does not expose
|
|
|
# fine-grained control to the undo/redo system.
|
|
|
if self._control.isUndoRedoEnabled():
|
|
|
self._control.setUndoRedoEnabled(False)
|
|
|
self._control.setUndoRedoEnabled(True)
|
|
|
|
|
|
def _complete_with_items(self, cursor, items):
|
|
|
""" Performs completion with 'items' at the specified cursor location.
|
|
|
"""
|
|
|
self._cancel_text_completion()
|
|
|
|
|
|
if len(items) == 1:
|
|
|
cursor.setPosition(self._control.textCursor().position(),
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.insertText(items[0])
|
|
|
|
|
|
elif len(items) > 1:
|
|
|
current_pos = self._control.textCursor().position()
|
|
|
prefix = commonprefix(items)
|
|
|
if prefix:
|
|
|
cursor.setPosition(current_pos, QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.insertText(prefix)
|
|
|
current_pos = cursor.position()
|
|
|
|
|
|
if self.gui_completion:
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left, n=len(prefix))
|
|
|
self._completion_widget.show_items(cursor, items)
|
|
|
else:
|
|
|
cursor.beginEditBlock()
|
|
|
self._append_plain_text('\n')
|
|
|
self._page(self._format_as_columns(items))
|
|
|
cursor.endEditBlock()
|
|
|
|
|
|
cursor.setPosition(current_pos)
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
self._control.setTextCursor(cursor)
|
|
|
self._text_completing_pos = current_pos
|
|
|
|
|
|
def _context_menu_make(self, pos):
|
|
|
""" Creates a context menu for the given QPoint (in widget coordinates).
|
|
|
"""
|
|
|
menu = QtGui.QMenu(self)
|
|
|
|
|
|
self.cut_action = menu.addAction('Cut', self.cut)
|
|
|
self.cut_action.setEnabled(self.can_cut())
|
|
|
self.cut_action.setShortcut(QtGui.QKeySequence.Cut)
|
|
|
|
|
|
self.copy_action = menu.addAction('Copy', self.copy)
|
|
|
self.copy_action.setEnabled(self.can_copy())
|
|
|
self.copy_action.setShortcut(QtGui.QKeySequence.Copy)
|
|
|
|
|
|
self.paste_action = menu.addAction('Paste', self.paste)
|
|
|
self.paste_action.setEnabled(self.can_paste())
|
|
|
self.paste_action.setShortcut(QtGui.QKeySequence.Paste)
|
|
|
|
|
|
menu.addSeparator()
|
|
|
menu.addAction(self.select_all_action)
|
|
|
|
|
|
menu.addSeparator()
|
|
|
menu.addAction(self.export_action)
|
|
|
menu.addAction(self.print_action)
|
|
|
|
|
|
return menu
|
|
|
|
|
|
def _control_key_down(self, modifiers, include_command=False):
|
|
|
""" Given a KeyboardModifiers flags object, return whether the Control
|
|
|
key is down.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
include_command : bool, optional (default True)
|
|
|
Whether to treat the Command key as a (mutually exclusive) synonym
|
|
|
for Control when in Mac OS.
|
|
|
"""
|
|
|
# Note that on Mac OS, ControlModifier corresponds to the Command key
|
|
|
# while MetaModifier corresponds to the Control key.
|
|
|
if sys.platform == 'darwin':
|
|
|
down = include_command and (modifiers & QtCore.Qt.ControlModifier)
|
|
|
return bool(down) ^ bool(modifiers & QtCore.Qt.MetaModifier)
|
|
|
else:
|
|
|
return bool(modifiers & QtCore.Qt.ControlModifier)
|
|
|
|
|
|
def _create_control(self):
|
|
|
""" Creates and connects the underlying text widget.
|
|
|
"""
|
|
|
# Create the underlying control.
|
|
|
if self.kind == 'plain':
|
|
|
control = QtGui.QPlainTextEdit()
|
|
|
elif self.kind == 'rich':
|
|
|
control = QtGui.QTextEdit()
|
|
|
control.setAcceptRichText(False)
|
|
|
|
|
|
# Install event filters. The filter on the viewport is needed for
|
|
|
# mouse events and drag events.
|
|
|
control.installEventFilter(self)
|
|
|
control.viewport().installEventFilter(self)
|
|
|
|
|
|
# Connect signals.
|
|
|
control.cursorPositionChanged.connect(self._cursor_position_changed)
|
|
|
control.customContextMenuRequested.connect(
|
|
|
self._custom_context_menu_requested)
|
|
|
control.copyAvailable.connect(self.copy_available)
|
|
|
control.redoAvailable.connect(self.redo_available)
|
|
|
control.undoAvailable.connect(self.undo_available)
|
|
|
|
|
|
# Hijack the document size change signal to prevent Qt from adjusting
|
|
|
# the viewport's scrollbar. We are relying on an implementation detail
|
|
|
# of Q(Plain)TextEdit here, which is potentially dangerous, but without
|
|
|
# this functionality we cannot create a nice terminal interface.
|
|
|
layout = control.document().documentLayout()
|
|
|
layout.documentSizeChanged.disconnect()
|
|
|
layout.documentSizeChanged.connect(self._adjust_scrollbars)
|
|
|
|
|
|
# Configure the control.
|
|
|
control.setAttribute(QtCore.Qt.WA_InputMethodEnabled, True)
|
|
|
control.setContextMenuPolicy(QtCore.Qt.CustomContextMenu)
|
|
|
control.setReadOnly(True)
|
|
|
control.setUndoRedoEnabled(False)
|
|
|
control.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
|
|
|
return control
|
|
|
|
|
|
def _create_page_control(self):
|
|
|
""" Creates and connects the underlying paging widget.
|
|
|
"""
|
|
|
if self.kind == 'plain':
|
|
|
control = QtGui.QPlainTextEdit()
|
|
|
elif self.kind == 'rich':
|
|
|
control = QtGui.QTextEdit()
|
|
|
control.installEventFilter(self)
|
|
|
viewport = control.viewport()
|
|
|
viewport.installEventFilter(self)
|
|
|
control.setReadOnly(True)
|
|
|
control.setUndoRedoEnabled(False)
|
|
|
control.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
|
|
|
return control
|
|
|
|
|
|
def _event_filter_console_keypress(self, event):
|
|
|
""" Filter key events for the underlying text widget to create a
|
|
|
console-like interface.
|
|
|
"""
|
|
|
intercepted = False
|
|
|
cursor = self._control.textCursor()
|
|
|
position = cursor.position()
|
|
|
key = event.key()
|
|
|
ctrl_down = self._control_key_down(event.modifiers())
|
|
|
alt_down = event.modifiers() & QtCore.Qt.AltModifier
|
|
|
shift_down = event.modifiers() & QtCore.Qt.ShiftModifier
|
|
|
|
|
|
#------ Special sequences ----------------------------------------------
|
|
|
|
|
|
if event.matches(QtGui.QKeySequence.Copy):
|
|
|
self.copy()
|
|
|
intercepted = True
|
|
|
|
|
|
elif event.matches(QtGui.QKeySequence.Cut):
|
|
|
self.cut()
|
|
|
intercepted = True
|
|
|
|
|
|
elif event.matches(QtGui.QKeySequence.Paste):
|
|
|
self.paste()
|
|
|
intercepted = True
|
|
|
|
|
|
#------ Special modifier logic -----------------------------------------
|
|
|
|
|
|
elif key in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter):
|
|
|
intercepted = True
|
|
|
|
|
|
# Special handling when tab completing in text mode.
|
|
|
self._cancel_text_completion()
|
|
|
|
|
|
if self._in_buffer(position):
|
|
|
# Special handling when a reading a line of raw input.
|
|
|
if self._reading:
|
|
|
self._append_plain_text('\n')
|
|
|
self._reading = False
|
|
|
if self._reading_callback:
|
|
|
self._reading_callback()
|
|
|
|
|
|
# If the input buffer is a single line or there is only
|
|
|
# whitespace after the cursor, execute. Otherwise, split the
|
|
|
# line with a continuation prompt.
|
|
|
elif not self._executing:
|
|
|
cursor.movePosition(QtGui.QTextCursor.End,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
at_end = len(cursor.selectedText().strip()) == 0
|
|
|
single_line = (self._get_end_cursor().blockNumber() ==
|
|
|
self._get_prompt_cursor().blockNumber())
|
|
|
if (at_end or shift_down or single_line) and not ctrl_down:
|
|
|
self.execute(interactive = not shift_down)
|
|
|
else:
|
|
|
# Do this inside an edit block for clean undo/redo.
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.setPosition(position)
|
|
|
cursor.insertText('\n')
|
|
|
self._insert_continuation_prompt(cursor)
|
|
|
cursor.endEditBlock()
|
|
|
|
|
|
# Ensure that the whole input buffer is visible.
|
|
|
# FIXME: This will not be usable if the input buffer is
|
|
|
# taller than the console widget.
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
self._control.setTextCursor(cursor)
|
|
|
|
|
|
#------ Control/Cmd modifier -------------------------------------------
|
|
|
|
|
|
elif ctrl_down:
|
|
|
if key == QtCore.Qt.Key_G:
|
|
|
self._keyboard_quit()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_K:
|
|
|
if self._in_buffer(position):
|
|
|
cursor.clearSelection()
|
|
|
cursor.movePosition(QtGui.QTextCursor.EndOfLine,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
if not cursor.hasSelection():
|
|
|
# Line deletion (remove continuation prompt)
|
|
|
cursor.movePosition(QtGui.QTextCursor.NextBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
QtGui.QTextCursor.KeepAnchor,
|
|
|
len(self._continuation_prompt))
|
|
|
self._kill_ring.kill_cursor(cursor)
|
|
|
self._set_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_L:
|
|
|
self.prompt_to_top()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_O:
|
|
|
if self._page_control and self._page_control.isVisible():
|
|
|
self._page_control.setFocus()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_U:
|
|
|
if self._in_buffer(position):
|
|
|
cursor.clearSelection()
|
|
|
start_line = cursor.blockNumber()
|
|
|
if start_line == self._get_prompt_cursor().blockNumber():
|
|
|
offset = len(self._prompt)
|
|
|
else:
|
|
|
offset = len(self._continuation_prompt)
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
QtGui.QTextCursor.KeepAnchor, offset)
|
|
|
self._kill_ring.kill_cursor(cursor)
|
|
|
self._set_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Y:
|
|
|
self._keep_cursor_in_buffer()
|
|
|
self._kill_ring.yank()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key in (QtCore.Qt.Key_Backspace, QtCore.Qt.Key_Delete):
|
|
|
if key == QtCore.Qt.Key_Backspace:
|
|
|
cursor = self._get_word_start_cursor(position)
|
|
|
else: # key == QtCore.Qt.Key_Delete
|
|
|
cursor = self._get_word_end_cursor(position)
|
|
|
cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor)
|
|
|
self._kill_ring.kill_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_D:
|
|
|
if len(self.input_buffer) == 0:
|
|
|
self.exit_requested.emit(self)
|
|
|
else:
|
|
|
new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,
|
|
|
QtCore.Qt.Key_Delete,
|
|
|
QtCore.Qt.NoModifier)
|
|
|
QtGui.qApp.sendEvent(self._control, new_event)
|
|
|
intercepted = True
|
|
|
|
|
|
#------ Alt modifier ---------------------------------------------------
|
|
|
|
|
|
elif alt_down:
|
|
|
if key == QtCore.Qt.Key_B:
|
|
|
self._set_cursor(self._get_word_start_cursor(position))
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_F:
|
|
|
self._set_cursor(self._get_word_end_cursor(position))
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Y:
|
|
|
self._kill_ring.rotate()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Backspace:
|
|
|
cursor = self._get_word_start_cursor(position)
|
|
|
cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor)
|
|
|
self._kill_ring.kill_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_D:
|
|
|
cursor = self._get_word_end_cursor(position)
|
|
|
cursor.setPosition(position, QtGui.QTextCursor.KeepAnchor)
|
|
|
self._kill_ring.kill_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Delete:
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Greater:
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Less:
|
|
|
self._control.setTextCursor(self._get_prompt_cursor())
|
|
|
intercepted = True
|
|
|
|
|
|
#------ No modifiers ---------------------------------------------------
|
|
|
|
|
|
else:
|
|
|
if shift_down:
|
|
|
anchormode = QtGui.QTextCursor.KeepAnchor
|
|
|
else:
|
|
|
anchormode = QtGui.QTextCursor.MoveAnchor
|
|
|
|
|
|
if key == QtCore.Qt.Key_Escape:
|
|
|
self._keyboard_quit()
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Up:
|
|
|
if self._reading or not self._up_pressed(shift_down):
|
|
|
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(shift_down):
|
|
|
intercepted = True
|
|
|
else:
|
|
|
end_line = self._get_end_cursor().blockNumber()
|
|
|
intercepted = cursor.blockNumber() == end_line
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Tab:
|
|
|
if not self._reading:
|
|
|
if self._tab_pressed():
|
|
|
# real tab-key, insert four spaces
|
|
|
cursor.insertText(' '*4)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Left:
|
|
|
|
|
|
# Move to the previous line
|
|
|
line, col = cursor.blockNumber(), cursor.columnNumber()
|
|
|
if line > self._get_prompt_cursor().blockNumber() and \
|
|
|
col == len(self._continuation_prompt):
|
|
|
self._control.moveCursor(QtGui.QTextCursor.PreviousBlock,
|
|
|
mode=anchormode)
|
|
|
self._control.moveCursor(QtGui.QTextCursor.EndOfBlock,
|
|
|
mode=anchormode)
|
|
|
intercepted = True
|
|
|
|
|
|
# Regular left movement
|
|
|
else:
|
|
|
intercepted = not self._in_buffer(position - 1)
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Right:
|
|
|
original_block_number = cursor.blockNumber()
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
mode=anchormode)
|
|
|
if cursor.blockNumber() != original_block_number:
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
n=len(self._continuation_prompt),
|
|
|
mode=anchormode)
|
|
|
self._set_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Home:
|
|
|
start_line = cursor.blockNumber()
|
|
|
if start_line == self._get_prompt_cursor().blockNumber():
|
|
|
start_pos = self._prompt_pos
|
|
|
else:
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
start_pos = cursor.position()
|
|
|
start_pos += len(self._continuation_prompt)
|
|
|
cursor.setPosition(position)
|
|
|
if shift_down and self._in_buffer(position):
|
|
|
cursor.setPosition(start_pos, QtGui.QTextCursor.KeepAnchor)
|
|
|
else:
|
|
|
cursor.setPosition(start_pos)
|
|
|
self._set_cursor(cursor)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Backspace:
|
|
|
|
|
|
# Line deletion (remove continuation prompt)
|
|
|
line, col = cursor.blockNumber(), cursor.columnNumber()
|
|
|
if not self._reading and \
|
|
|
col == len(self._continuation_prompt) and \
|
|
|
line > self._get_prompt_cursor().blockNumber():
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.removeSelectedText()
|
|
|
cursor.deletePreviousChar()
|
|
|
cursor.endEditBlock()
|
|
|
intercepted = True
|
|
|
|
|
|
# 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:
|
|
|
|
|
|
# Line deletion (remove continuation prompt)
|
|
|
if not self._reading and self._in_buffer(position) and \
|
|
|
cursor.atBlockEnd() and not cursor.hasSelection():
|
|
|
cursor.movePosition(QtGui.QTextCursor.NextBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right,
|
|
|
QtGui.QTextCursor.KeepAnchor,
|
|
|
len(self._continuation_prompt))
|
|
|
cursor.removeSelectedText()
|
|
|
intercepted = True
|
|
|
|
|
|
# Regular forwards deletion:
|
|
|
else:
|
|
|
anchor = cursor.anchor()
|
|
|
intercepted = (not self._in_buffer(anchor) or
|
|
|
not self._in_buffer(position))
|
|
|
|
|
|
# Don't move the cursor if Control/Cmd is pressed to allow copy-paste
|
|
|
# using the keyboard in any part of the buffer. Also, permit scrolling
|
|
|
# with Page Up/Down keys. Finally, if we're executing, don't move the
|
|
|
# cursor (if even this made sense, we can't guarantee that the prompt
|
|
|
# position is still valid due to text truncation).
|
|
|
if not (self._control_key_down(event.modifiers(), include_command=True)
|
|
|
or key in (QtCore.Qt.Key_PageUp, QtCore.Qt.Key_PageDown)
|
|
|
or (self._executing and not self._reading)):
|
|
|
self._keep_cursor_in_buffer()
|
|
|
|
|
|
return intercepted
|
|
|
|
|
|
def _event_filter_page_keypress(self, event):
|
|
|
""" Filter key events for the paging widget to create console-like
|
|
|
interface.
|
|
|
"""
|
|
|
key = event.key()
|
|
|
ctrl_down = self._control_key_down(event.modifiers())
|
|
|
alt_down = event.modifiers() & QtCore.Qt.AltModifier
|
|
|
|
|
|
if ctrl_down:
|
|
|
if key == QtCore.Qt.Key_O:
|
|
|
self._control.setFocus()
|
|
|
intercept = True
|
|
|
|
|
|
elif alt_down:
|
|
|
if key == QtCore.Qt.Key_Greater:
|
|
|
self._page_control.moveCursor(QtGui.QTextCursor.End)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Less:
|
|
|
self._page_control.moveCursor(QtGui.QTextCursor.Start)
|
|
|
intercepted = True
|
|
|
|
|
|
elif key in (QtCore.Qt.Key_Q, QtCore.Qt.Key_Escape):
|
|
|
if self._splitter:
|
|
|
self._page_control.hide()
|
|
|
self._control.setFocus()
|
|
|
else:
|
|
|
self.layout().setCurrentWidget(self._control)
|
|
|
return True
|
|
|
|
|
|
elif key in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return,
|
|
|
QtCore.Qt.Key_Tab):
|
|
|
new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,
|
|
|
QtCore.Qt.Key_PageDown,
|
|
|
QtCore.Qt.NoModifier)
|
|
|
QtGui.qApp.sendEvent(self._page_control, new_event)
|
|
|
return True
|
|
|
|
|
|
elif key == QtCore.Qt.Key_Backspace:
|
|
|
new_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress,
|
|
|
QtCore.Qt.Key_PageUp,
|
|
|
QtCore.Qt.NoModifier)
|
|
|
QtGui.qApp.sendEvent(self._page_control, new_event)
|
|
|
return True
|
|
|
|
|
|
return False
|
|
|
|
|
|
def _format_as_columns(self, items, separator=' '):
|
|
|
""" Transform a list of strings into a single string with columns.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
items : sequence of strings
|
|
|
The strings to process.
|
|
|
|
|
|
separator : str, optional [default is two spaces]
|
|
|
The string that separates columns.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
The formatted string.
|
|
|
"""
|
|
|
# Calculate the number of characters available.
|
|
|
width = self._control.viewport().width()
|
|
|
char_width = QtGui.QFontMetrics(self.font).width(' ')
|
|
|
displaywidth = max(10, (width / char_width) - 1)
|
|
|
|
|
|
return columnize(items, separator, displaywidth)
|
|
|
|
|
|
def _get_block_plain_text(self, block):
|
|
|
""" Given a QTextBlock, return its unformatted text.
|
|
|
"""
|
|
|
cursor = QtGui.QTextCursor(block)
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfBlock)
|
|
|
cursor.movePosition(QtGui.QTextCursor.EndOfBlock,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
return cursor.selection().toPlainText()
|
|
|
|
|
|
def _get_cursor(self):
|
|
|
""" Convenience method that returns a cursor for the current position.
|
|
|
"""
|
|
|
return self._control.textCursor()
|
|
|
|
|
|
def _get_end_cursor(self):
|
|
|
""" Convenience method that returns a cursor for the last character.
|
|
|
"""
|
|
|
cursor = self._control.textCursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.End)
|
|
|
return cursor
|
|
|
|
|
|
def _get_input_buffer_cursor_column(self):
|
|
|
""" Returns the column of the cursor in the input buffer, excluding the
|
|
|
contribution by the prompt, or -1 if there is no such column.
|
|
|
"""
|
|
|
prompt = self._get_input_buffer_cursor_prompt()
|
|
|
if prompt is None:
|
|
|
return -1
|
|
|
else:
|
|
|
cursor = self._control.textCursor()
|
|
|
return cursor.columnNumber() - len(prompt)
|
|
|
|
|
|
def _get_input_buffer_cursor_line(self):
|
|
|
""" Returns the text of the line of the input buffer that contains the
|
|
|
cursor, or None if there is no such line.
|
|
|
"""
|
|
|
prompt = self._get_input_buffer_cursor_prompt()
|
|
|
if prompt is None:
|
|
|
return None
|
|
|
else:
|
|
|
cursor = self._control.textCursor()
|
|
|
text = self._get_block_plain_text(cursor.block())
|
|
|
return text[len(prompt):]
|
|
|
|
|
|
def _get_input_buffer_cursor_prompt(self):
|
|
|
""" Returns the (plain text) prompt for line of the input buffer that
|
|
|
contains the cursor, or None if there is no such line.
|
|
|
"""
|
|
|
if self._executing:
|
|
|
return None
|
|
|
cursor = self._control.textCursor()
|
|
|
if cursor.position() >= self._prompt_pos:
|
|
|
if cursor.blockNumber() == self._get_prompt_cursor().blockNumber():
|
|
|
return self._prompt
|
|
|
else:
|
|
|
return self._continuation_prompt
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
def _get_prompt_cursor(self):
|
|
|
""" Convenience method that returns a cursor for the prompt position.
|
|
|
"""
|
|
|
cursor = self._control.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._control.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._control.document()
|
|
|
position -= 1
|
|
|
while position >= self._prompt_pos and \
|
|
|
not is_letter_or_number(document.characterAt(position)):
|
|
|
position -= 1
|
|
|
while position >= self._prompt_pos and \
|
|
|
is_letter_or_number(document.characterAt(position)):
|
|
|
position -= 1
|
|
|
cursor = self._control.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._control.document()
|
|
|
end = self._get_end_cursor().position()
|
|
|
while position < end and \
|
|
|
not is_letter_or_number(document.characterAt(position)):
|
|
|
position += 1
|
|
|
while position < end and \
|
|
|
is_letter_or_number(document.characterAt(position)):
|
|
|
position += 1
|
|
|
cursor = self._control.textCursor()
|
|
|
cursor.setPosition(position)
|
|
|
return cursor
|
|
|
|
|
|
def _insert_continuation_prompt(self, cursor):
|
|
|
""" Inserts new continuation prompt using the specified cursor.
|
|
|
"""
|
|
|
if self._continuation_prompt_html is None:
|
|
|
self._insert_plain_text(cursor, self._continuation_prompt)
|
|
|
else:
|
|
|
self._continuation_prompt = self._insert_html_fetching_plain_text(
|
|
|
cursor, self._continuation_prompt_html)
|
|
|
|
|
|
def _insert_html(self, cursor, html):
|
|
|
""" Inserts HTML using the specified cursor in such a way that future
|
|
|
formatting is unaffected.
|
|
|
"""
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.insertHtml(html)
|
|
|
|
|
|
# After inserting HTML, the text document "remembers" it's in "html
|
|
|
# mode", which means that subsequent calls adding plain text will result
|
|
|
# in unwanted formatting, lost tab characters, etc. The following code
|
|
|
# hacks around this behavior, which I consider to be a bug in Qt, by
|
|
|
# (crudely) resetting the document's style state.
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
if cursor.selection().toPlainText() == ' ':
|
|
|
cursor.removeSelectedText()
|
|
|
else:
|
|
|
cursor.movePosition(QtGui.QTextCursor.Right)
|
|
|
cursor.insertText(' ', QtGui.QTextCharFormat())
|
|
|
cursor.endEditBlock()
|
|
|
|
|
|
def _insert_html_fetching_plain_text(self, cursor, html):
|
|
|
""" Inserts HTML using the specified cursor, then returns its plain text
|
|
|
version.
|
|
|
"""
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.removeSelectedText()
|
|
|
|
|
|
start = cursor.position()
|
|
|
self._insert_html(cursor, html)
|
|
|
end = cursor.position()
|
|
|
cursor.setPosition(start, QtGui.QTextCursor.KeepAnchor)
|
|
|
text = cursor.selection().toPlainText()
|
|
|
|
|
|
cursor.setPosition(end)
|
|
|
cursor.endEditBlock()
|
|
|
return text
|
|
|
|
|
|
def _insert_plain_text(self, cursor, text):
|
|
|
""" Inserts plain text using the specified cursor, processing ANSI codes
|
|
|
if enabled.
|
|
|
"""
|
|
|
cursor.beginEditBlock()
|
|
|
if self.ansi_codes:
|
|
|
for substring in self._ansi_processor.split_string(text):
|
|
|
for act in self._ansi_processor.actions:
|
|
|
|
|
|
# Unlike real terminal emulators, we don't distinguish
|
|
|
# between the screen and the scrollback buffer. A screen
|
|
|
# erase request clears everything.
|
|
|
if act.action == 'erase' and act.area == 'screen':
|
|
|
cursor.select(QtGui.QTextCursor.Document)
|
|
|
cursor.removeSelectedText()
|
|
|
|
|
|
# Simulate a form feed by scrolling just past the last line.
|
|
|
elif act.action == 'scroll' and act.unit == 'page':
|
|
|
cursor.insertText('\n')
|
|
|
cursor.endEditBlock()
|
|
|
self._set_top_cursor(cursor)
|
|
|
cursor.joinPreviousEditBlock()
|
|
|
cursor.deletePreviousChar()
|
|
|
|
|
|
elif act.action == 'carriage-return':
|
|
|
cursor.movePosition(
|
|
|
cursor.StartOfLine, cursor.KeepAnchor)
|
|
|
|
|
|
elif act.action == 'beep':
|
|
|
QtGui.qApp.beep()
|
|
|
|
|
|
format = self._ansi_processor.get_format()
|
|
|
cursor.insertText(substring, format)
|
|
|
else:
|
|
|
cursor.insertText(text)
|
|
|
cursor.endEditBlock()
|
|
|
|
|
|
def _insert_plain_text_into_buffer(self, cursor, text):
|
|
|
""" Inserts text into the input buffer using the specified cursor (which
|
|
|
must be in the input buffer), ensuring that continuation prompts are
|
|
|
inserted as necessary.
|
|
|
"""
|
|
|
lines = text.splitlines(True)
|
|
|
if lines:
|
|
|
cursor.beginEditBlock()
|
|
|
cursor.insertText(lines[0])
|
|
|
for line in lines[1:]:
|
|
|
if self._continuation_prompt_html is None:
|
|
|
cursor.insertText(self._continuation_prompt)
|
|
|
else:
|
|
|
self._continuation_prompt = \
|
|
|
self._insert_html_fetching_plain_text(
|
|
|
cursor, self._continuation_prompt_html)
|
|
|
cursor.insertText(line)
|
|
|
cursor.endEditBlock()
|
|
|
|
|
|
def _in_buffer(self, position=None):
|
|
|
""" Returns whether the current cursor (or, if specified, a position) is
|
|
|
inside the editing region.
|
|
|
"""
|
|
|
cursor = self._control.textCursor()
|
|
|
if position is None:
|
|
|
position = cursor.position()
|
|
|
else:
|
|
|
cursor.setPosition(position)
|
|
|
line = cursor.blockNumber()
|
|
|
prompt_line = self._get_prompt_cursor().blockNumber()
|
|
|
if line == prompt_line:
|
|
|
return position >= self._prompt_pos
|
|
|
elif line > prompt_line:
|
|
|
cursor.movePosition(QtGui.QTextCursor.StartOfBlock)
|
|
|
prompt_pos = cursor.position() + len(self._continuation_prompt)
|
|
|
return position >= prompt_pos
|
|
|
return False
|
|
|
|
|
|
def _keep_cursor_in_buffer(self):
|
|
|
""" Ensures that the cursor is inside the editing region. Returns
|
|
|
whether the cursor was moved.
|
|
|
"""
|
|
|
moved = not self._in_buffer()
|
|
|
if moved:
|
|
|
cursor = self._control.textCursor()
|
|
|
cursor.movePosition(QtGui.QTextCursor.End)
|
|
|
self._control.setTextCursor(cursor)
|
|
|
return moved
|
|
|
|
|
|
def _keyboard_quit(self):
|
|
|
""" Cancels the current editing task ala Ctrl-G in Emacs.
|
|
|
"""
|
|
|
if self._text_completing_pos:
|
|
|
self._cancel_text_completion()
|
|
|
else:
|
|
|
self.input_buffer = ''
|
|
|
|
|
|
def _page(self, text, html=False):
|
|
|
""" Displays text using the pager if it exceeds the height of the
|
|
|
viewport.
|
|
|
|
|
|
Parameters:
|
|
|
-----------
|
|
|
html : bool, optional (default False)
|
|
|
If set, the text will be interpreted as HTML instead of plain text.
|
|
|
"""
|
|
|
line_height = QtGui.QFontMetrics(self.font).height()
|
|
|
minlines = self._control.viewport().height() / line_height
|
|
|
if self.paging != 'none' and \
|
|
|
re.match("(?:[^\n]*\n){%i}" % minlines, text):
|
|
|
if self.paging == 'custom':
|
|
|
self.custom_page_requested.emit(text)
|
|
|
else:
|
|
|
self._page_control.clear()
|
|
|
cursor = self._page_control.textCursor()
|
|
|
if html:
|
|
|
self._insert_html(cursor, text)
|
|
|
else:
|
|
|
self._insert_plain_text(cursor, text)
|
|
|
self._page_control.moveCursor(QtGui.QTextCursor.Start)
|
|
|
|
|
|
self._page_control.viewport().resize(self._control.size())
|
|
|
if self._splitter:
|
|
|
self._page_control.show()
|
|
|
self._page_control.setFocus()
|
|
|
else:
|
|
|
self.layout().setCurrentWidget(self._page_control)
|
|
|
elif html:
|
|
|
self._append_plain_html(text)
|
|
|
else:
|
|
|
self._append_plain_text(text)
|
|
|
|
|
|
def _prompt_finished(self):
|
|
|
""" Called immediately after a prompt is finished, i.e. when some input
|
|
|
will be processed and a new prompt displayed.
|
|
|
"""
|
|
|
self._control.setReadOnly(True)
|
|
|
self._prompt_finished_hook()
|
|
|
|
|
|
def _prompt_started(self):
|
|
|
""" Called immediately after a new prompt is displayed.
|
|
|
"""
|
|
|
# Temporarily disable the maximum block count to permit undo/redo and
|
|
|
# to ensure that the prompt position does not change due to truncation.
|
|
|
self._control.document().setMaximumBlockCount(0)
|
|
|
self._control.setUndoRedoEnabled(True)
|
|
|
|
|
|
# Work around bug in QPlainTextEdit: input method is not re-enabled
|
|
|
# when read-only is disabled.
|
|
|
self._control.setReadOnly(False)
|
|
|
self._control.setAttribute(QtCore.Qt.WA_InputMethodEnabled, True)
|
|
|
|
|
|
if not self._reading:
|
|
|
self._executing = False
|
|
|
self._prompt_started_hook()
|
|
|
|
|
|
# If the input buffer has changed while executing, load it.
|
|
|
if self._input_buffer_pending:
|
|
|
self.input_buffer = self._input_buffer_pending
|
|
|
self._input_buffer_pending = ''
|
|
|
|
|
|
self._control.moveCursor(QtGui.QTextCursor.End)
|
|
|
|
|
|
def _readline(self, prompt='', callback=None):
|
|
|
""" Reads one line of input from the user.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
prompt : str, optional
|
|
|
The prompt to print before reading the line.
|
|
|
|
|
|
callback : callable, optional
|
|
|
A callback to execute with the read line. If not specified, input is
|
|
|
read *synchronously* and this method does not return until it has
|
|
|
been read.
|
|
|
|
|
|
Returns
|
|
|
-------
|
|
|
If a callback is specified, returns nothing. Otherwise, returns the
|
|
|
input string with the trailing newline stripped.
|
|
|
"""
|
|
|
if self._reading:
|
|
|
raise RuntimeError('Cannot read a line. Widget is already reading.')
|
|
|
|
|
|
if not callback and not self.isVisible():
|
|
|
# If the user cannot see the widget, this function cannot return.
|
|
|
raise RuntimeError('Cannot synchronously read a line if the widget '
|
|
|
'is not visible!')
|
|
|
|
|
|
self._reading = True
|
|
|
self._show_prompt(prompt, newline=False)
|
|
|
|
|
|
if callback is None:
|
|
|
self._reading_callback = None
|
|
|
while self._reading:
|
|
|
QtCore.QCoreApplication.processEvents()
|
|
|
return self._get_input_buffer(force=True).rstrip('\n')
|
|
|
|
|
|
else:
|
|
|
self._reading_callback = lambda: \
|
|
|
callback(self._get_input_buffer(force=True).rstrip('\n'))
|
|
|
|
|
|
def _set_continuation_prompt(self, prompt, html=False):
|
|
|
""" Sets the continuation prompt.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
prompt : str
|
|
|
The prompt to show when more input is needed.
|
|
|
|
|
|
html : bool, optional (default False)
|
|
|
If set, the prompt will be inserted as formatted HTML. Otherwise,
|
|
|
the prompt will be treated as plain text, though ANSI color codes
|
|
|
will be handled.
|
|
|
"""
|
|
|
if html:
|
|
|
self._continuation_prompt_html = prompt
|
|
|
else:
|
|
|
self._continuation_prompt = prompt
|
|
|
self._continuation_prompt_html = None
|
|
|
|
|
|
def _set_cursor(self, cursor):
|
|
|
""" Convenience method to set the current cursor.
|
|
|
"""
|
|
|
self._control.setTextCursor(cursor)
|
|
|
|
|
|
def _set_top_cursor(self, cursor):
|
|
|
""" Scrolls the viewport so that the specified cursor is at the top.
|
|
|
"""
|
|
|
scrollbar = self._control.verticalScrollBar()
|
|
|
scrollbar.setValue(scrollbar.maximum())
|
|
|
original_cursor = self._control.textCursor()
|
|
|
self._control.setTextCursor(cursor)
|
|
|
self._control.ensureCursorVisible()
|
|
|
self._control.setTextCursor(original_cursor)
|
|
|
|
|
|
def _show_prompt(self, prompt=None, html=False, newline=True):
|
|
|
""" Writes a new prompt at the end of the buffer.
|
|
|
|
|
|
Parameters
|
|
|
----------
|
|
|
prompt : str, optional
|
|
|
The prompt to show. If not specified, the previous prompt is used.
|
|
|
|
|
|
html : bool, optional (default False)
|
|
|
Only relevant when a prompt is specified. If set, the prompt will
|
|
|
be inserted as formatted HTML. Otherwise, the prompt will be treated
|
|
|
as plain text, though ANSI color codes will be handled.
|
|
|
|
|
|
newline : bool, optional (default True)
|
|
|
If set, a new line will be written before showing the prompt if
|
|
|
there is not already a newline at the end of the buffer.
|
|
|
"""
|
|
|
# Save the current end position to support _append*(before_prompt=True).
|
|
|
cursor = self._get_end_cursor()
|
|
|
self._append_before_prompt_pos = cursor.position()
|
|
|
|
|
|
# Insert a preliminary newline, if necessary.
|
|
|
if newline and cursor.position() > 0:
|
|
|
cursor.movePosition(QtGui.QTextCursor.Left,
|
|
|
QtGui.QTextCursor.KeepAnchor)
|
|
|
if cursor.selection().toPlainText() != '\n':
|
|
|
self._append_plain_text('\n')
|
|
|
|
|
|
# Write the prompt.
|
|
|
self._append_plain_text(self._prompt_sep)
|
|
|
if prompt is None:
|
|
|
if self._prompt_html is None:
|
|
|
self._append_plain_text(self._prompt)
|
|
|
else:
|
|
|
self._append_html(self._prompt_html)
|
|
|
else:
|
|
|
if html:
|
|
|
self._prompt = self._append_html_fetching_plain_text(prompt)
|
|
|
self._prompt_html = prompt
|
|
|
else:
|
|
|
self._append_plain_text(prompt)
|
|
|
self._prompt = prompt
|
|
|
self._prompt_html = None
|
|
|
|
|
|
self._prompt_pos = self._get_end_cursor().position()
|
|
|
self._prompt_started()
|
|
|
|
|
|
#------ Signal handlers ----------------------------------------------------
|
|
|
|
|
|
def _adjust_scrollbars(self):
|
|
|
""" Expands the vertical scrollbar beyond the range set by Qt.
|
|
|
"""
|
|
|
# This code is adapted from _q_adjustScrollbars in qplaintextedit.cpp
|
|
|
# and qtextedit.cpp.
|
|
|
document = self._control.document()
|
|
|
scrollbar = self._control.verticalScrollBar()
|
|
|
viewport_height = self._control.viewport().height()
|
|
|
if isinstance(self._control, QtGui.QPlainTextEdit):
|
|
|
maximum = max(0, document.lineCount() - 1)
|
|
|
step = viewport_height / self._control.fontMetrics().lineSpacing()
|
|
|
else:
|
|
|
# QTextEdit does not do line-based layout and blocks will not in
|
|
|
# general have the same height. Therefore it does not make sense to
|
|
|
# attempt to scroll in line height increments.
|
|
|
maximum = document.size().height()
|
|
|
step = viewport_height
|
|
|
diff = maximum - scrollbar.maximum()
|
|
|
scrollbar.setRange(0, maximum)
|
|
|
scrollbar.setPageStep(step)
|
|
|
|
|
|
# Compensate for undesirable scrolling that occurs automatically due to
|
|
|
# maximumBlockCount() text truncation.
|
|
|
if diff < 0 and document.blockCount() == document.maximumBlockCount():
|
|
|
scrollbar.setValue(scrollbar.value() + diff)
|
|
|
|
|
|
def _cursor_position_changed(self):
|
|
|
""" Clears the temporary buffer based on the cursor position.
|
|
|
"""
|
|
|
if self._text_completing_pos:
|
|
|
document = self._control.document()
|
|
|
if self._text_completing_pos < document.characterCount():
|
|
|
cursor = self._control.textCursor()
|
|
|
pos = cursor.position()
|
|
|
text_cursor = self._control.textCursor()
|
|
|
text_cursor.setPosition(self._text_completing_pos)
|
|
|
if pos < self._text_completing_pos or \
|
|
|
cursor.blockNumber() > text_cursor.blockNumber():
|
|
|
self._clear_temporary_buffer()
|
|
|
self._text_completing_pos = 0
|
|
|
else:
|
|
|
self._clear_temporary_buffer()
|
|
|
self._text_completing_pos = 0
|
|
|
|
|
|
def _custom_context_menu_requested(self, pos):
|
|
|
""" Shows a context menu at the given QPoint (in widget coordinates).
|
|
|
"""
|
|
|
menu = self._context_menu_make(pos)
|
|
|
menu.exec_(self._control.mapToGlobal(pos))
|
|
|
|
