Add --name-only flag for 'xinput list'.

The default output of xinput list is hard to parse by scripts. Provide a
--name-only option to print the device name only, without any other
information.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Dirk Wallenstein <halsmit@t-online.de>
Tested-by: Dirk Wallenstein <halsmit@t-online.de>

3 files changed, 30 insertions, 8 deletions

diff --git a/man/xinput.man b/man/xinput.man
index 65b05e3..035becc 100644
--- a/man/xinput.man
+++ b/man/xinput.man
@@ -17,12 +17,15 @@ of the program and the version supported by the server. This option does not
 require a device name.
 .PP
 .TP 8
-.B --list [--short || --long] [\fIdevice\fP]
+.B --list [--short || --long || --name-only] [\fIdevice\fP]
 If no argument is given list all the input devices. If an argument is given,
 show all the features of \fIdevice\fP.
 If --long is provided, the output includes detailed information about the
 capabilities of each devices. Otherwise, or if --short is provided, only the
 device names and some minimal information is listed.
+If --name-only is provided, the output is limited to the device names. One
+device name is listed per line. Note that the order the devices are listed
+is undefined.
 .PP
 .TP 8
 .B --get-feedbacks \fIdevice\fP
diff --git a/src/list.c b/src/list.c
index 9538a0a..0e6f9be 100644
--- a/src/list.c
+++ b/src/list.c
@@ -26,7 +26,8 @@
 
 enum print_format {
     FORMAT_SHORT,
-    FORMAT_LONG
+    FORMAT_LONG,
+    FORMAT_NAME
 };
 
 
@@ -40,6 +41,12 @@ print_info(Display* dpy, XDeviceInfo	*info, enum print_format format)
     XValuatorInfoPtr	v;
     XAxisInfoPtr	a;
 
+    if (format == FORMAT_NAME)
+    {
+        printf("%s\n", info->name);
+        return;
+    }
+
     printf("\"%s\"\tid=%ld\t[", info->name, info->id);
 
     switch (info->use) {
@@ -192,6 +199,12 @@ print_classes_xi2(Display* display, XIAnyClassInfo **classes,
 static void
 print_info_xi2(Display* display, XIDeviceInfo *dev, enum print_format format)
 {
+    if (format == FORMAT_NAME)
+    {
+        printf("%s\n", dev->name);
+        return;
+    }
+
     printf("%-40s\tid=%d\t[", dev->name, dev->deviceid);
     switch(dev->use)
     {
@@ -246,10 +259,13 @@ list_xi2(Display *display,
         dev = &info[i];
         if (dev->use == XIMasterPointer || dev->use == XIMasterKeyboard)
         {
-            if (dev->use == XIMasterPointer)
-                printf("⎡ ");
-            else
-                printf("⎣ ");
+            if (format == FORMAT_SHORT || format == FORMAT_LONG)
+            {
+                if (dev->use == XIMasterPointer)
+                    printf("⎡ ");
+                else
+                    printf("⎣ ");
+            }
 
             print_info_xi2(display, dev, format);
             for (j = 0; j < ndevices; j++)
@@ -259,7 +275,8 @@ list_xi2(Display *display,
                 if ((sd->use == XISlavePointer || sd->use == XISlaveKeyboard) &&
                      (sd->attachment == dev->deviceid))
                 {
-                    printf("%s   ↳ ", dev->use == XIMasterPointer ? "⎜" : " ");
+                    if (format == FORMAT_SHORT || format == FORMAT_LONG)
+                        printf("%s   ↳ ", dev->use == XIMasterPointer ? "⎜" : " ");
                     print_info_xi2(display, sd, format);
                 }
             }
@@ -298,6 +315,8 @@ list(Display	*display,
             format = FORMAT_SHORT;
         else if (strcmp(argv[0], "--long") == 0)
             format = FORMAT_LONG;
+        else if (strcmp(argv[0], "--name-only") == 0)
+            format = FORMAT_NAME;
         arg_dev++;
     }
 
diff --git a/src/xinput.c b/src/xinput.c
index 9ca3832..86c163e 100644
--- a/src/xinput.c
+++ b/src/xinput.c
@@ -68,7 +68,7 @@ static entry drivers[] =
      set_mode
     },
     {"list",
-     "[--short || --long] [<device name>...]",
+     "[--short || --long || --name-only] [<device name>...]",
      list
     },
     {"query-state",