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
|
# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2016 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""
This module contains :class:`SafeIconProvider`.
"""
__authors__ = ["V. Valls"]
__license__ = "MIT"
__date__ = "31/10/2017"
import sys
import logging
from silx.gui import qt
_logger = logging.getLogger(__name__)
class SafeFileIconProvider(qt.QFileIconProvider):
"""
This class reimplement :class:`qt.QFileIconProvider` to avoid blocking
access to the file system.
It avoid to use `qt.QFileInfo.absoluteFilePath` or
`qt.QFileInfo.canonicalPath` to reach drive icons which are known to
freeze the file system using network drives.
Computer root, and drive root paths are filtered. Other paths are not
filtered while it is anyway needed to synchronoze a drive to accesss to it.
"""
WIN32_DRIVE_UNKNOWN = 0
"""The drive type cannot be determined."""
WIN32_DRIVE_NO_ROOT_DIR = 1
"""The root path is invalid; for example, there is no volume mounted at the
specified path."""
WIN32_DRIVE_REMOVABLE = 2
"""The drive has removable media; for example, a floppy drive, thumb drive,
or flash card reader."""
WIN32_DRIVE_FIXED = 3
"""The drive has fixed media; for example, a hard disk drive or flash
drive."""
WIN32_DRIVE_REMOTE = 4
"""The drive is a remote (network) drive."""
WIN32_DRIVE_CDROM = 5
"""The drive is a CD-ROM drive."""
WIN32_DRIVE_RAMDISK = 6
"""The drive is a RAM disk."""
def __init__(self):
qt.QFileIconProvider.__init__(self)
self.__filterDirAndFiles = False
if sys.platform == "win32":
self._windowsTypes = {}
item = "Drive", qt.QStyle.SP_DriveHDIcon
self._windowsTypes[self.WIN32_DRIVE_UNKNOWN] = item
item = "Invalid root", qt.QStyle.SP_DriveHDIcon
self._windowsTypes[self.WIN32_DRIVE_NO_ROOT_DIR] = item
item = "Removable", qt.QStyle.SP_DriveNetIcon
self._windowsTypes[self.WIN32_DRIVE_REMOVABLE] = item
item = "Drive", qt.QStyle.SP_DriveHDIcon
self._windowsTypes[self.WIN32_DRIVE_FIXED] = item
item = "Remote", qt.QStyle.SP_DriveNetIcon
self._windowsTypes[self.WIN32_DRIVE_REMOTE] = item
item = "CD-ROM", qt.QStyle.SP_DriveCDIcon
self._windowsTypes[self.WIN32_DRIVE_CDROM] = item
item = "RAM disk", qt.QStyle.SP_DriveHDIcon
self._windowsTypes[self.WIN32_DRIVE_RAMDISK] = item
def __windowsDriveTypeId(self, info):
try:
import ctypes
path = info.filePath()
dtype = ctypes.cdll.kernel32.GetDriveTypeW(path)
except Exception:
_logger.warning("Impossible to identify drive %s" % path)
_logger.debug("Backtrace", exc_info=True)
return self.WIN32_DRIVE_UNKNOWN
return dtype
def __windowsDriveIcon(self, info):
dtype = self.__windowsDriveTypeId(info)
default = self._windowsTypes[self.WIN32_DRIVE_UNKNOWN]
driveInfo = self._windowsTypes.get(dtype, default)
style = qt.QApplication.instance().style()
icon = style.standardIcon(driveInfo[1])
return icon
def __windowsDriveType(self, info):
dtype = self.__windowsDriveTypeId(info)
default = self._windowsTypes[self.WIN32_DRIVE_UNKNOWN]
driveInfo = self._windowsTypes.get(dtype, default)
return driveInfo[0]
def icon(self, info):
style = qt.QApplication.instance().style()
path = info.filePath()
if path in ["", "/"]:
# That's the computer root on Windows or Linux
result = style.standardIcon(qt.QStyle.SP_ComputerIcon)
elif sys.platform == "win32" and path[-2] == ":":
# That's a drive on Windows
result = self.__windowsDriveIcon(info)
elif self.__filterDirAndFiles:
if info.isDir():
result = style.standardIcon(qt.QStyle.SP_DirIcon)
else:
result = style.standardIcon(qt.QStyle.SP_FileIcon)
else:
result = qt.QFileIconProvider.icon(self, info)
return result
def type(self, info):
path = info.filePath()
if path in ["", "/"]:
# That's the computer root on Windows or Linux
result = "Computer"
elif sys.platform == "win32" and path[-2] == ":":
# That's a drive on Windows
result = self.__windowsDriveType(info)
elif self.__filterDirAndFiles:
if info.isDir():
result = "Directory"
else:
result = info.suffix()
else:
result = qt.QFileIconProvider.type(self, info)
return result
|
