add swaps plugin

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/src/plugins/swaps.py b/src/plugins/swaps.py
new file mode 100644
index 0000000..e09a034
--- /dev/null
+++ b/src/plugins/swaps.py
@@ -0,0 +1,56 @@
+# -*- python -*-
+'''
+xpybar – xmobar replacement written in python
+Copyright © 2014, 2015  Mattias Andrée (maandree@member.fsf.org)
+
+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 3 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, see <http://www.gnu.org/licenses/>.
+'''
+
+
+class Swaps:
+    '''
+    Swap statistics
+    
+    @variable  headers:list<str>          The titles of the fields
+    @variable  header_map:dict<str, int>  Map from field title to field index (the reverse of `headers`)
+    @variable  swaps:list<list<str>>      List of swaps spaces, each element in this list is a list of
+                                          fields identified by `headers`
+    '''
+    
+    def __init__(self):
+        '''
+        Constructor
+        '''
+        with open('/proc/swaps', 'rb') as file:
+            data = file.read()
+        data = data.decode('utf-8', 'replace').rstrip('\n').replace('\t', ' ')
+        data = data.split('\n')
+        self.headers, self.swaps = Swaps.__split(data[0]), [Swaps.__split(line) for line in data[1:]]
+        self.header_map = dict((t, i) for i, t in enumerate(self.headers))
+    
+    
+    def refresh(self):
+        '''
+        Update the variable `swaps`
+        '''
+        with open('/proc/swaps', 'rb') as file:
+            data = file.read()
+        data = data.decode('utf-8', 'replace').rstrip('\n').replace('\t', ' ').split('\n')[1:]
+        self.swaps = [Swaps.__split(line) for line in data]
+    
+    
+    @staticmethod
+    def __split(line):
+        return [field for field in line.split(' ') if not field == '']
+