xrandr lists a DP1 connector I don't actually have

[lilass.git] / external_screen.py

diff --git a/external_screen.py b/external_screen.py
index e365ef58b51e082b3c3edd2af8047b6a39ee4bdd..9d70b82ba649956ee5d50fa317e6d1046bad32d8 100755 (executable)
--- a/external_screen.py
+++ b/external_screen.py
@@ -10,46 +10,82 @@ def getXrandrInformation():
        connector = None # current connector
        for line in p.stdout:
                # new connector?
-               m = re.search('^([\w]+) connected ', line)
+               m = re.search(r'^([\w]+) connected ', line)
                if m is not None:
                        connector = m.groups()[0]
                        assert connector not in connectors
                        connectors[connector] = []
                        continue
                # new resolution?
-               m = re.search('^   ([\d]+)x([\d]+) +', line)
+               m = re.search(r'^   ([\d]+)x([\d]+) +', line)
                if m is not None:
                        assert connector is not None
                        connectors[connector].append((int(m.groups()[0]), int(m.groups()[1])))
+       p.communicate()
+       if p.returncode != 0: raise Exception("Querying xrandr for data failed")
        return connectors
 
-def res2str(res):
+def res2xrandr(res):
        (w, h) = res
        return str(w)+'x'+str(h)
 
+def res2user(res):
+       (w, h) = res
+       # get ratio
+       ratio = int(round(16.0*h/w))
+       if ratio == 12: # 16:12 = 4:3
+               strRatio = '4:3'
+       elif ratio == 13: # 16:12.8 = 5:4
+               strRatio = '5:4'
+       else: # let's just hope this will never be 14 or more...
+               strRatio = '16:%d' % ratio
+       return '%dx%d (%s)' %(w, h, strRatio)
+
 # Check screen setup
-internalName = "LVDS"
-externalName = "CRT1"
+internalName = "LVDS1"
+externalNames = ["HDMI1", "DP1", "VGA1"]
 connectors = getXrandrInformation()
 internalResolutions = connectors[internalName] # there must be a screen assoicated to the internal connector
-externalResolutions = connectors.get(externalName)
+externalName = None # *the* external connector which is actually used
+externalResolutions = None # resultions of the external connector
+args = {} # maps connector names to xrand arguments
+
+# look for enabled external screen, disable all the others
+for name in externalNames:
+       if externalResolutions is None and name in connectors:
+               externalName = name
+               externalResolutions = connectors[name]
+       else:
+               args[name] = ["--off"]
 
 # Check what to do
-internalArgs = ["--mode", res2str(internalResolutions[0])] # there must be a resolution for the internal screen
-externalArgs = ["--off"]
-if externalResolutions is not None: # we need to ask what to do
-       extPosition = PositionSelection(map(res2str, externalResolutions))
+if externalName is not None: # we need to ask what to do
+       extPosition = PositionSelection(externalName, map(res2user, internalResolutions), map(res2user, externalResolutions))
        extPosition.exec_()
        if not extPosition.result(): sys.exit(1) # the user canceled
+       extResolution = res2xrandr(externalResolutions[extPosition.extResolutions.currentIndex()])
+       intResolution = res2xrandr(internalResolutions[extPosition.intResolutions.currentIndex()])
        # build command-line
-       externalArgs = ["--mode", extPosition.resolution] # we definitely want an external screen
-       if extPosition.position == PositionSelection.EXTERNAL_ONLY:
-               internalArgs = ["--off"]
-       elif extPosition.position == PositionSelection.LEFT:
-               externalArgs += ["--left-of", internalName]
+       args[externalName] = ["--mode", extResolution] # we definitely want an external screen
+       if extPosition.extOnly.isChecked():
+               args[internalName] = ["--off"]
+               args[externalName] += ["--primary"]
        else:
-               externalArgs += ["--right-of", internalName]
+               # there are two screens
+               args[internalName] = ["--mode", intResolution]
+               if extPosition.posLeft.isChecked():
+                       args[externalName] += ["--left-of", internalName]
+               else:
+                       args[externalName] += ["--right-of", internalName]
+               if extPosition.primExt.isChecked():
+                       args[externalName] += ["--primary"]
+               else:
+                       args[internalName] += ["--primary"]
+else:
+       args[internalName] = ["--mode", res2xrandr(internalResolutions[0]), "--primary"]
 # and do it
-args = ["--output", internalName] + internalArgs + ["--output", externalName] + externalArgs
-print args
-subprocess.check_call(["xrandr"] + args)
+call = ["xrandr"]
+for name in args:
+       call += ["--output", name] + args[name]
+print "Call that will be made:",call
+subprocess.check_call(call)