Option to execute command instead of keybind for buttons

doc/rofi-theme.5.markdown

@@ -1322,6 +1322,20 @@ icon-paste {
 }
 ```
 
+Alternatively, the property `exec` can be set to be a command such as a program or shell script instead of `action`. The optional property `exit-after-command` (default **false**) can be set so Rofi exits upon completion of that command.
+
+For example, the following configuration would create an icon widget that, when clicked, opens an XTerm session and closes Rofi:
+
+```css
+icon-xterm {
+    expand: false;
+    filename: "/usr/share/pixmaps/mini.xterm_48x48.xpm";
+    size: 24;
+    exec: "xterm";
+    exit-after-command: true;
+}
+```
+
 #### button
 
 This is a textbox widget that can have a 'clickable' action. The `action` can
@@ -1337,6 +1351,18 @@ button-paste {
 }
 ```
 
+As with icon widgets, the button widget can alternatively be set to run a command when clicked with the `exec` property and Rofi can be set to exit upon the command's completion by setting the `exit-after-command` property to **true**.
+
+```css
+button-xterm {
+    expand: false;
+    content: "Launch XTerm";
+    vertical-align: 0.5;
+    exec: "xterm";
+    exit-after-command: true;
+}
+```
+
 #### Children
 
 To specify children, set the `children`

source/view.c

@@ -1552,6 +1552,9 @@ WidgetTriggerActionResult textbox_button_trigger_action(
   switch (action) {
   case MOUSE_CLICK_DOWN: {
     const char *type = rofi_theme_get_string(wid, "action", NULL);
+    const char *command = rofi_theme_get_string(wid, "exec", NULL);
+    const int exit_after = rofi_theme_get_boolean(wid, "exit-after-command", FALSE);
+
     if (type) {
       if (state->list_view) {
         (state->selected_line) =
@@ -1565,6 +1568,12 @@ WidgetTriggerActionResult textbox_button_trigger_action(
       }
       state->skip_absorb = TRUE;
       return WIDGET_TRIGGER_ACTION_RESULT_HANDLED;
+    } else if (command) {
+      if (helper_execute_command(NULL, command, FALSE, NULL)) {
+        if (exit_after) {
+          rofi_quit_main_loop();
+        }
+      }
     }
   }
   case MOUSE_CLICK_UP:
@@ -1790,7 +1799,8 @@ static void rofi_view_add_widget(RofiViewState *state, widget *parent_widget,
     icon *t = icon_create(parent_widget, name);
     /* small hack to make it clickable */
     const char *type = rofi_theme_get_string(WIDGET(t), "action", NULL);
-    if (type) {
+    const char *command = rofi_theme_get_string(WIDGET(t), "exec", NULL);
+    if (type || command) {
       WIDGET(t)->type = WIDGET_TYPE_EDITBOX;
     }
     box_add((box *)parent_widget, WIDGET(t), TRUE);