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authorMattias Andrée <maandree@operamail.com>2014-03-30 14:05:14 +0200
committerMattias Andrée <maandree@operamail.com>2014-03-30 14:05:14 +0200
commit4a5b5f8e4905c45ac4099b0c8086627d44cb0427 (patch)
tree7729a96f41a8b6810c9dae0719a22b8997bee491 /src/monitor.py
parentdocument (diff)
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Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/monitor.py')
-rw-r--r--src/monitor.py27
1 files changed, 25 insertions, 2 deletions
diff --git a/src/monitor.py b/src/monitor.py
index 6d6349f..33397ff 100644
--- a/src/monitor.py
+++ b/src/monitor.py
@@ -512,42 +512,65 @@ def list_screens_randr():
@return :Screens An instance of a datastructure with the relevant information
'''
+ # Spawn the executeable library blueshift_idcrtc
process = Popen([LIBEXECDIR + os.sep + 'blueshift_idcrtc'], stdout = PIPE)
+ # Wait for the child process to exit and gather its output to stdout
lines = process.communicate()[0].decode('utf-8', 'error').split('\n')
+ # Ensure that the child process has exited
while process.returncode is None:
process.wait()
+ # Raise an exception if the child process failed
if process.returncode != 0:
raise Exception('blueshift_idcrtc exited with value %i' % process.returncode)
+ # Trim the beginning of each line, that is, remove the
+ # indention added for human readablility
lines = [line.strip() for line in lines]
screens, screen_i, screen, output = None, None, None, None
for line in lines:
if line.startswith('Screen count: '):
+ # Prepare the screen table when we know how many screens there are
screens = [None] * int(line[len('Screen count: '):])
elif line.startswith('Screen: '):
+ # Get the index of the next screen
screen_i = int(line[len('Screen: '):])
- screen = Screen()
- screens[screen_i] = screen
+ # And add it to the table
+ screens[screen_i] = screen = Screen()
elif line.startswith('CRTC count: '):
+ # Store the number of CRTC:s
screen.crtc_count = int(line[len('CRTC count: '):])
elif line.startswith('Output count: '):
+ # Prepare the current screens output table when we know how many outputs it has
screen.outputs = [None] * int(line[len('Output count: '):])
elif line.startswith('Output: '):
+ # Get the index of the next output
output_i = int(line[len('Output: '):])
+ # Create structure for the output
output = Output()
+ # Store the screen index for the output so that it is easy
+ # to look it up when iterating over outputs
output.screen = screen_i
+ # Store the output in the table
screen.outputs[output_i] = output
elif line.startswith('Name: '):
+ # Store the name of the output
output.name = line[len('Name: '):]
elif line.startswith('Connection: '):
+ # Store the connection status of the output's connector
output.connected = line[len('Connection: '):] == 'connected'
elif line.startswith('Size: '):
+ # Store the physical dimensions of the monitor
output.widthmm, output.heightmm = [int(x) for x in line[len('Size: '):].split(' ')]
+ # But if it is zero or less it is unknown
if (output.widthmm <= 0) or (output.heightmm <= 0):
output.widthmm, output.heightmm = None, None
elif line.startswith('CRTC: '):
+ # Store the CRTC index of the output
output.crtc = int(line[len('CRTC: '):])
elif line.startswith('EDID: '):
+ # Store the output's extended dislay identification data
output.edid = line[len('EDID: '):]
+ # Store all screens in a special class that
+ # makes it easier to use them collectively
rc = Screens()
rc.screens = screens
return rc