Added command getwindowclassname (#247)

Co-authored-by: dominic <gitkraken@domi.ninja>

Makefile

@@ -49,7 +49,7 @@ CMDOBJS= cmd_click.o cmd_mousemove.o cmd_mousemove_relative.o cmd_mousedown.o \
          cmd_set_desktop_for_window.o cmd_get_desktop_for_window.o \
          cmd_get_desktop_viewport.o cmd_set_desktop_viewport.o \
          cmd_windowkill.o cmd_behave.o cmd_window_select.o \
-         cmd_getwindowname.o cmd_behave_screen_edge.o \
+         cmd_getwindowname.o cmd_getwindowclassname.o cmd_behave_screen_edge.o \
          cmd_windowminimize.o cmd_exec.o cmd_getwindowgeometry.o \
          cmd_windowclose.o cmd_windowquit.o \
          cmd_sleep.o cmd_get_display_geometry.o

cmd_getwindowclassname.c

@@ -0,0 +1,47 @@
+#include "xdo_cmd.h"
+
+int cmd_getwindowclassname(context_t *context) {
+  char *cmd = context->argv[0];
+
+  int c;
+  static struct option longopts[] = {
+    { "help", no_argument, NULL, 'h' },
+    { 0, 0, 0, 0 },
+  };
+  static const char *usage = 
+    "Usage: %s [window=%1]\n"
+    HELP_SEE_WINDOW_STACK;
+  int option_index;
+
+  while ((c = getopt_long_only(context->argc, context->argv, "+h",
+                               longopts, &option_index)) != -1) {
+    switch (c) {
+      case 'h':
+        printf(usage, cmd);
+        consume_args(context, context->argc);
+        return EXIT_SUCCESS;
+        break;
+      default:
+        fprintf(stderr, usage, cmd);
+        return EXIT_FAILURE;
+    }
+  }
+
+  consume_args(context, optind);
+
+  const char *window_arg = "%1";
+  if (!window_get_arg(context, 0, 0, &window_arg)) {
+    fprintf(stderr, usage, cmd);
+    return EXIT_FAILURE;
+  }
+
+  unsigned char *name;
+
+  window_each(context, window_arg, {
+    xdo_get_window_classname(context->xdo, window, &name);
+    xdotool_output(context, "%s", name);
+    XFree(name);
+  }); /* window_each(...) */
+  return EXIT_SUCCESS;
+}
+

xdo.c

@@ -1915,6 +1915,14 @@ int xdo_get_window_name(const xdo_t *xdo, Window window,
   return 0;
 }
 
+int xdo_get_window_classname(const xdo_t *xdo, Window window, unsigned char **name_ret) {
+  XClassHint classhint;
+  XGetClassHint(xdo->xdpy, window, &classhint);
+  XFree(classhint.res_name);
+  *name_ret = (char*) classhint.res_class;
+  return 0;
+}
+
 int xdo_window_state(xdo_t *xdo, Window window, unsigned long action, const char *property) {
   int ret;
   XEvent xev;

xdotool.c

@@ -220,6 +220,7 @@ struct dispatch {
   { "getactivewindow", cmd_getactivewindow, },
   { "getwindowfocus", cmd_getwindowfocus, },
   { "getwindowname", cmd_getwindowname, },
+  { "getwindowclassname", cmd_getwindowclassname},
   { "getwindowpid", cmd_getwindowpid, },
   { "getwindowgeometry", cmd_getwindowgeometry, },
   { "getdisplaygeometry", cmd_get_display_geometry, },

xdotool.h

@@ -49,6 +49,7 @@ int cmd_getactivewindow(context_t *context);
 int cmd_getmouselocation(context_t *context);
 int cmd_getwindowfocus(context_t *context);
 int cmd_getwindowname(context_t *context);
+int cmd_getwindowclassname(context_t *context);
 int cmd_getwindowpid(context_t *context);
 int cmd_getwindowgeometry(context_t *context);
 int cmd_help(context_t *context);