Add `primary_selection` config option

See: https://github.com/swaywm/sway/issues/4511

Adds a bool config option `primary_selection`, which explicitly
enables/disables the primary selection clipboard. Defaults to enabled.

This is implemented as a launch-only option which enables or disables the creation of the
`zwp_primary_selection_device_manager_v1` global.

Co-authored-by: Tilde Rose <t1lde@protonmail.com>

6 files changed, 34 insertions, 1 deletions

diff --git a/sway/commands.c b/sway/commands.c
index 2160a970..041da7ea 100644
--- a/sway/commands.c
+++ b/sway/commands.c
@@ -82,6 +82,7 @@ static const struct cmd_handler handlers[] = {
         { "no_focus", cmd_no_focus },
         { "output", cmd_output },
         { "popup_during_fullscreen", cmd_popup_during_fullscreen },
+        { "primary_selection", cmd_primary_selection },
         { "seat", cmd_seat },
         { "set", cmd_set },
         { "show_marks", cmd_show_marks },
diff --git a/sway/commands/primary_selection.c b/sway/commands/primary_selection.c
new file mode 100644
index 00000000..585b079d
--- /dev/null
+++ b/sway/commands/primary_selection.c
@@ -0,0 +1,23 @@
+#include <string.h>
+#include <strings.h>
+#include "sway/config.h"
+#include "sway/commands.h"
+#include "util.h"
+
+struct cmd_results *cmd_primary_selection(int argc, char **argv) {
+        struct cmd_results *error = NULL;
+        if ((error = checkarg(argc, "primary_selection", EXPECTED_EQUAL_TO, 1))) {
+                return error;
+        }
+
+        bool primary_selection = parse_boolean(argv[0], true);
+
+        if (config->reloading && config->primary_selection != primary_selection) {
+                return cmd_results_new(CMD_FAILURE,
+                                "primary_selection can only be enabled/disabled at launch");
+        }
+
+        config->primary_selection = parse_boolean(argv[0], true);
+
+        return cmd_results_new(CMD_SUCCESS, NULL);
+}
diff --git a/sway/config.c b/sway/config.c
index b41dd871..1f2bb686 100644
--- a/sway/config.c
+++ b/sway/config.c
@@ -273,6 +273,7 @@ static void config_defaults(struct sway_config *config) {
         config->title_align = ALIGN_LEFT;
         config->tiling_drag = true;
         config->tiling_drag_threshold = 9;
+        config->primary_selection = true;
 
         config->smart_gaps = SMART_GAPS_OFF;
         config->gaps_inner = 0;
diff --git a/sway/meson.build b/sway/meson.build
index de10e14f..b2412d5e 100644
--- a/sway/meson.build
+++ b/sway/meson.build
@@ -86,6 +86,7 @@ sway_sources = files(
         'commands/nop.c',
         'commands/output.c',
         'commands/popup_during_fullscreen.c',
+        'commands/primary_selection.c',
         'commands/reload.c',
         'commands/rename.c',
         'commands/resize.c',
diff --git a/sway/server.c b/sway/server.c
index 2db069a2..43ff8cfb 100644
--- a/sway/server.c
+++ b/sway/server.c
@@ -210,7 +210,6 @@ bool server_init(struct sway_server *server) {
         wlr_export_dmabuf_manager_v1_create(server->wl_display);
         wlr_screencopy_manager_v1_create(server->wl_display);
         wlr_data_control_manager_v1_create(server->wl_display);
-        wlr_primary_selection_v1_device_manager_create(server->wl_display);
         wlr_viewporter_create(server->wl_display);
         wlr_single_pixel_buffer_manager_v1_create(server->wl_display);
         server->content_type_manager_v1 =
@@ -308,6 +307,10 @@ bool server_start(struct sway_server *server) {
         }
 #endif
 
+        if (config->primary_selection) {
+                wlr_primary_selection_v1_device_manager_create(server->wl_display);
+        }
+
         sway_log(SWAY_INFO, "Starting backend on wayland display '%s'",
                         server->socket);
         if (!wlr_backend_start(server->backend)) {
diff --git a/sway/sway.5.scd b/sway/sway.5.scd
index f6aab2d4..25082c41 100644
--- a/sway/sway.5.scd
+++ b/sway/sway.5.scd
@@ -807,6 +807,10 @@ The default colors are:
         dialog will not be rendered. If _leave_fullscreen_, the view will exit
         fullscreen mode and the dialog will be rendered.
 
+*primary_selection* enabled|disabled
+        Enable or disable the primary selection clipboard. May only be configured
+        at launch. Default is _enabled_.
+
 *set* $<name> <value>
         Sets variable $_name_ to _value_. You can use the new variable in the
         arguments of future commands. When the variable is used, it can be escaped