Implement popup_during_fullscreen

This introduces a new view_impl function: is_transient_for. Similar to
container_has_ancestor but works using the surface parents rather than
the tree.

This patch modifies view_is_visible, container_at and so on to allow
transient views to function normally when they're in front of a
fullscreen view.

1 files changed, 25 insertions, 0 deletions

diff --git a/sway/commands/popup_during_fullscreen.c b/sway/commands/popup_during_fullscreen.c
new file mode 100644
index 00000000..da1904b6
--- /dev/null
+++ b/sway/commands/popup_during_fullscreen.c
@@ -0,0 +1,25 @@
+#include <strings.h>
+#include "sway/commands.h"
+#include "sway/config.h"
+
+struct cmd_results *cmd_popup_during_fullscreen(int argc, char **argv) {
+        struct cmd_results *error = NULL;
+        if ((error = checkarg(argc, "popup_during_fullscreen",
+                                        EXPECTED_EQUAL_TO, 1))) {
+                return error;
+        }
+
+        if (strcasecmp(argv[0], "smart") == 0) {
+                config->popup_during_fullscreen = POPUP_SMART;
+        } else if (strcasecmp(argv[0], "ignore") == 0) {
+                config->popup_during_fullscreen = POPUP_IGNORE;
+        } else if (strcasecmp(argv[0], "leave_fullscreen") == 0) {
+                config->popup_during_fullscreen = POPUP_LEAVE;
+        } else {
+                return cmd_results_new(CMD_INVALID, "popup_during_fullscreen",
+                                "Expected "
+                                "'popup_during_fullscreen smart|ignore|leave_fullscreen'");
+        }
+
+        return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}