1 #!/usr/bin/env bash
2 
3 # Quick-n-dirty script to turn external/internal displays on/off with xrandr
4 #
5 # 2013-14,2020,2022 by Matthias Schmidt <xhr giessen.ccc.de>
6 #
7 # License GNU GPL
8 
9 function choose_profile()
10 {
11   local PROFILE=$1
12 
13   # Use classic profile mode with -p
14   if [ -n "${PROFILE}" ]; then
15     case "$PROFILE" in
16       # Home profile: Internal on, external extended
17       home)
18         INTERN="LVDS1"
19         EXTERN[0]="HDMI1"
20         ;;
21       # Work profile: Internal off, both external displays on
22       work)
23         INTERN="LVDS1"
24         EXTERN[1]="HDMI3"
25         EXTERN[0]="HDMI2"
26         ;;
27       # Projector profile: Internal on, external VGA extended
28       vga)
29         INTERN="LVDS1"
30         EXTERN[0]="VGA1"
31         ;;
32       # -----------------------------------------------------------------------
33       # Add your own profiles here.
34       # -----------------------------------------------------------------------
35       # name)
36       #   INTERN="LVDS1"
37       #   EXTERN[0]="VGA1"
38       #   ...
39       #   EXTERN[n]="VGAn"
40       #   ;;
41       # -----------------------------------------------------------------------
42       *)
43         usage
44         pr "Profile $PROFILE not found"
45         exit 1
46         ;;
47     esac
48   # No profiles, use the connected displays instead
49   else
50     # Convert string with connected displays to array
51     local DARRAY=( ${CONNDIS} )
52     # Assume that the first display is the internal one
53     INTERN=${DARRAY[0]}
54     i=0
55     for d in "${DARRAY[@]:1}"; do
56       EXTERN[$i]=$d
57       i=$(($i + 1))
58     done
59 
60     [ $VERBOSE -eq 1 ] && {
61       echo "Internal Display"
62       echo -n "  "
63       pg "${INTERN}"
64       echo "External Display(s)"
65       echo -n "  "
66       pg ${EXTERN[@]}
67     }
68   fi
69 
70   # Set options deliberatly if toogle mode is on
71   if [ ${TFLAG} -eq 1 ]; then
72     # 0 = extend
73     # 1 = mirror 
74     # 2 = internal only
75     # 3 = external only
76     case "${STATE}" in
77       0)
78         # Do nothing here
79         ;;
80       1)
81         CFLAG=1
82         ;;
83       2)
84         IFLAG=1
85         ;;
86       3)
87         EFLAG=1
88         ;;
89     esac
90   fi
91 
92   # Only enable the internal display
93   if [ $IFLAG -eq 1 ]; then
94     build_xrandr_string "--auto" "--off"
95   # Clone screen on all displays
96   elif [ $CFLAG -eq 1 ]; then
97     RES=`xrandr -q | egrep "^ *[0-9]*x[0-9]*" | awk {'print $1'} | sort | uniq -d | head -1`
98     build_xrandr_string "--mode $RES" "--same-as $INTERN"
99   # Turn internal display off
100   elif [ $EFLAG -eq 1 ]; then
101     if [ $RIGHTOF -eq 1 ]; then
102       build_xrandr_string "--off" "--auto" "--right-of"
103     else
104       build_xrandr_string "--off" "--auto" "--left-of"
105     fi
106   # Internal on and extend screen on all displays by default
107   else
108     build_xrandr_string "--auto" "--auto" "--right-of"
109   fi
110 }
111 
112 function build_xrandr_string()
113 {
114   local DOINTERN=$1
115   local DOEXTERN=$2
116   local POSITION=$3
117 
118   CMD="xrandr --output $INTERN $DOINTERN "
119 
120   CMDEXT=
121   i=0
122   for d in ${EXTERN[*]}; do
123     if [ $CFLAG -eq 1 ]; then
124       CMDEXT="${CMDEXT} --output $d ${DOEXTERN} --mode ${RES}"
125     elif [ ! -z $POSITION ]; then
126       if [ $i -eq 0 ]; then
127         CMDEXT="${CMDEXT} --output $d ${DOEXTERN} ${POSITION} $INTERN"
128       else
129         CMDEXT="${CMDEXT} --output $d ${DOEXTERN} ${POSITION} ${EXTERN[i-1]}"
130       fi
131     else
132       CMDEXT="${CMDEXT} --output $d ${DOEXTERN} ${POSITION}"
133     fi
134     i=$(($i + 1))
135   done
136 
137   CMD="$CMD $CMDEXT"
138   [ $VERBOSE -eq 1 ] && {
139     echo "I'll run the following command:" 
140     pg "$CMD"
141   }
142 }
143 
144 function run_xrandr()
145 {
146   echo "$CMD $XRANDROPTS" | bash
147 }
148 
149 function read_config()
150 {
151   if [ -f ${DTCONF} ]; then
152     . ${DTCONF}
153   fi
154 }
155 
156 function get_last_option()
157 {
158   # Check if dtoggle saved the last state
159   if [ -f ${DTSTATE} ]; then
160     . ${DTSTATE}
161   fi
162 }
163 
164 function write_last_option()
165 {
166   echo "STATE=${STATE}" > ${DTSTATE}
167 }
168 
169 function toggle_option()
170 {
171   STATE=$(((${STATE} + 1) % 4))
172 }
173 
174 function usage()
175 {
176   echo "`basename $0` [-ceix] [-hmntv] [-lr] [-p profile]"
177   echo
178   echo "Display Options:"
179   echo " -c           Mirror screen on all displays"
180   echo " -e           Enable external display(s) and disable internal"
181   echo " -i           Enable only the internal display"
182   echo -n " -x           Extend screen to all displays "
183   pg "[default]"
184   echo
185   echo "General Options:"
186   echo " -h           Show this help"
187   echo " -m           Show all available modes"
188   echo " -n           Dry run. Do not run xrand.  Implies -v"
189   echo " -t           Toggle different options"
190   echo " -v           Be more verbose"
191   echo
192   echo "Position:"
193   echo " -l           Display n is left of display (n+1)"
194   echo -n " -r           Display n is right of display (n+1) "
195   pg "[default]"
196   echo
197   echo "Profile:"
198   echo " -p profile   Enable the specified profile"
199   echo
200 }
201 
202 RED='\e[0;31m'
203 GREEN='\e[0;32m'
204 BLUE='\e[0;34m'
205 NC="\e[0;37;40m"
206 
207 function pg()
208 {
209   echo -e "${GREEN}${1}${NC}"
210 }
211 
212 function pr()
213 {
214   echo -e "${RED}${1}${NC}"
215 }
216 
217 CMD=
218 PROFILE=
219 INTERN=
220 RES=
221 EXTERN[0]=
222 EXTERN[1]=
223 EXTERN[2]=
224 EXTERN[3]=
225 
226 # Clone screen on all displays
227 CFLAG=0
228 # Enable only external displays
229 EFLAG=0
230 # Enable only the internal display
231 IFLAG=0
232 # Toggle different modes
233 TFLAG=0
234 # Verbosity
235 VERBOSE=0
236 # Display n is right of display (n+1) [default]
237 RIGHTOF=1
238 # Additional options for xrandr
239 XRANDROPTS=""
240 # dtoggle state file
241 DTSTATE=$HOME/.dtoggle
242 # dtoggle state file
243 DTCONF=$HOME/.dtoggle.conf
244 # Default status
245 STATE=0
246 # Connected displays. Stolen from ArchLinux wiki
247 CONNDIS=$(xrandr | grep " connected" | awk '{ printf("%s ", $1)  }')
248 
249 while getopts "ciehmnrlp:vxt" opt; do
250   case $opt in
251     c)
252       CFLAG=1
253       ;;
254     i)
255       IFLAG=1
256       ;;
257     e)
258       EFLAG=1
259       ;;
260     t)
261       TFLAG=1
262       ;;
263     v)
264       VERBOSE=1
265       ;;
266     n)
267       XRANDROPTS="--dryrun"
268       VERBOSE=1
269       ;;
270     r)
271       RIGHTOF=1
272       ;;
273     l)
274       RIGHTOF=0
275       ;;
276     m)
277 	  pg "Connected Displays"
278 	  echo -n "  "
279 	  echo $CONNDIS
280 	  pg "Available Modes"
281 	  echo -n "  "
282 	  exec xrandr -q
283       ;;
284     x)
285       # Do nothing here since its the default
286       ;;
287     p)
288       [ ! -z "$OPTARG" ] && PROFILE=$OPTARG
289       ;;
290     h)
291       usage
292       exit 1
293       ;;
294     *)
295       usage
296       pr "Option not found"
297       exit 1
298       ;;
299   esac
300 done
301 
302 if [ $((CFLAG + $IFLAG + $EFLAG)) -gt 1 ]; then
303   usage
304   pr "Please specify either -c or -e or -i"
305   exit 1
306 fi
307 
308 read_config
309 
310 if [ ${TFLAG} -eq 1 ]; then
311   get_last_option
312   toggle_option
313   write_last_option
314 fi
315 
316 choose_profile $PROFILE
317 run_xrandr
318 
319 exit $?