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.

3 files changed, 12 insertions, 0 deletions

diff --git a/include/sway/commands.h b/include/sway/commands.h
index 21b8b87a..48228a98 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -154,6 +154,7 @@ sway_cmd cmd_new_window;
 sway_cmd cmd_no_focus;
 sway_cmd cmd_output;
 sway_cmd cmd_permit;
+sway_cmd cmd_popup_during_fullscreen;
 sway_cmd cmd_reject;
 sway_cmd cmd_reload;
 sway_cmd cmd_rename;
diff --git a/include/sway/config.h b/include/sway/config.h
index 0e51fbfb..00b5f25b 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -256,6 +256,12 @@ enum edge_border_types {
         E_SMART_NO_GAPS, /**< hide both if one window and gaps to edge is zero */
 };
 
+enum sway_popup_during_fullscreen {
+        POPUP_SMART,
+        POPUP_IGNORE,
+        POPUP_LEAVE,
+};
+
 enum command_context {
         CONTEXT_CONFIG = 1,
         CONTEXT_BINDING = 2,
@@ -355,6 +361,7 @@ struct sway_config {
         bool pango_markup;
         size_t urgent_timeout;
         enum sway_fowa focus_on_window_activation;
+        enum sway_popup_during_fullscreen popup_during_fullscreen;
 
         // Flags
         bool focus_follows_mouse;
diff --git a/include/sway/tree/view.h b/include/sway/tree/view.h
index 028be536..eb1e98e1 100644
--- a/include/sway/tree/view.h
+++ b/include/sway/tree/view.h
@@ -49,6 +49,8 @@ struct sway_view_impl {
                 wlr_surface_iterator_func_t iterator, void *user_data);
         void (*for_each_popup)(struct sway_view *view,
                 wlr_surface_iterator_func_t iterator, void *user_data);
+        bool (*is_transient_for)(struct sway_view *child,
+                        struct sway_view *ancestor);
         void (*close)(struct sway_view *view);
         void (*close_popups)(struct sway_view *view);
         void (*destroy)(struct sway_view *view);
@@ -396,4 +398,6 @@ void view_remove_saved_buffer(struct sway_view *view);
 
 void view_save_buffer(struct sway_view *view);
 
+bool view_is_transient_for(struct sway_view *child, struct sway_view *ancestor);
+
 #endif