1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
# vimode -- Vi Mode package for QPlainTextEdit
#
# Copyright (c) 2012 by Wilbert Berendsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
ViMode implements a Vi-like mode for QPlainTextEdit.
"""
from PyQt5.QtCore import QEvent, QObject, Qt
from PyQt5.QtGui import QFont, QPalette
from PyQt5.QtWidgets import QApplication, QTextEdit
# the Vi modes
NORMAL = 0
VISUAL = 1
INSERT = 2
REPLACE = 3
class ViMode(QObject):
"""Handles a Vi-like mode for a QPlainTextEdit."""
def __init__(self, textedit=None):
QObject.__init__(self)
# init all internal variables
self._mode = None
self._handlers = [None] * 4
self._textedit = None
self._originalCursorWidth = 1
self.setTextEdit(textedit)
def setTextEdit(self, edit):
old = self._textedit
if edit is old:
return
if old:
# disconnect old textedit
self.clearCursor()
old.removeEventFilter(self)
old.cursorPositionChanged.disconnect(self.updateCursorPosition)
old.selectionChanged.disconnect(self.updateCursorPosition)
old.setCursorWidth(self._originalCursorWidth)
self._textedit = edit
if edit:
# connect new textedit
edit.installEventFilter(self)
edit.cursorPositionChanged.connect(self.updateCursorPosition)
edit.selectionChanged.connect(self.updateCursorPosition)
self._originalCursorWidth = edit.cursorWidth()
self.setMode(NORMAL)
if edit:
self.updateCursorPosition()
def textEdit(self):
return self._textedit
def setMode(self, mode):
"""Sets the mode (NORMAL, VISUAL, INSERT or REPLACE)."""
if mode is self._mode:
return
assert mode in (NORMAL, VISUAL, INSERT, REPLACE)
if self._mode is not None and self.handler():
self.handler().leave()
self._mode = mode
if self._handlers[mode] is None:
self._handlers[mode] = self.createModeHandler(mode)
self.handler().enter()
self.updateCursorPosition()
def mode(self):
"""Return the current mode (NORMAL, VISUAL, INSERT or REPLACE)."""
return self._mode
def isNormal(self):
return self._mode is NORMAL
def isVisual(self):
return self._mode is VISUAL
def isInsert(self):
return self._mode is INSERT
def isReplace(self):
return self._mode is REPLACE
def createModeHandler(self, mode):
"""Returns a Handler for the specified mode."""
if mode == NORMAL:
from . import normal
return normal.NormalMode(self)
elif mode == VISUAL:
from . import visual
return visual.VisualMode(self)
elif mode == INSERT:
from . import insert
return insert.InsertMode(self)
elif mode == REPLACE:
from . import replace
return replace.ReplaceMode(self)
def handler(self):
"""Returns the current mode handler."""
return self._handlers[self._mode]
def updateCursorPosition(self):
"""If in command mode, shows a square cursor on the right spot."""
self.handler().updateCursorPosition()
def drawCursor(self, cursor):
"""Draws the cursor position as the selection of the specified cursor."""
es = QTextEdit.ExtraSelection()
es.format.setBackground(self.textEdit().palette().color(QPalette.Text))
es.format.setForeground(self.textEdit().palette().color(QPalette.Base))
es.cursor = cursor
self.textEdit().setExtraSelections([es])
def clearCursor(self):
"""Removes the drawn cursor position."""
self.textEdit().setExtraSelections([])
def eventFilter(self, obj, ev):
if (ev.type() in (QEvent.KeyPress, QEvent.KeyRelease) and
ev.key() in (Qt.Key_Shift, Qt.Key_Control, Qt.Key_Alt, Qt.Key_Meta)):
return False
if ev.type() == QEvent.KeyPress:
return self.handler().handleKeyPress(ev) or False
return False
def test():
a = QApplication([])
e = QTextEdit()
e.setCursorWidth(2)
e.setFont(QFont("Monospace"))
e.setPlainText("""\
some text
here another line
and here yet another
""")
e.show()
v = ViMode(e)
a.exec_()
|
