Add swaylock protocol, add resource destructors

This prevents sway crashing if swaybg or swaybar dies.

7 files changed, 68 insertions, 1 deletions

diff --git a/common/libsway-common.a b/common/libsway-common.a
new file mode 100644
index 00000000..22267800
--- /dev/null
+++ b/common/libsway-common.a
diff --git a/include/extensions.h b/include/extensions.h
index 1ef7d920..872fd3bd 100644
--- a/include/extensions.h
+++ b/include/extensions.h
@@ -1,18 +1,21 @@
 #ifndef _SWAY_EXTENSIONS_H
 #define _SWAY_EXTENSIONS_H
 
+#include <wayland-server-core.h>
+#include <wlc/wlc-wayland.h>
 #include "wayland-desktop-shell-server-protocol.h"
 #include "list.h"
-#include "wlc/wlc-wayland.h"
 
 struct background_config {
         wlc_handle output;
         wlc_resource surface;
+        struct wl_resource *resource;
 };
 
 struct panel_config {
         wlc_handle output;
         wlc_resource surface;
+        struct wl_resource *resource;
 };
 
 struct desktop_shell_state {
@@ -22,6 +25,12 @@ struct desktop_shell_state {
         struct wlc_size panel_size;
 };
 
+struct swaylock_state {
+        bool active;
+        wlc_handle output;
+        wlc_resource surface;
+};
+
 extern struct desktop_shell_state desktop_shell;
 
 void register_extensions(void);
diff --git a/protocols/CMakeLists.txt b/protocols/CMakeLists.txt
index 07becc36..d7516d0c 100644
--- a/protocols/CMakeLists.txt
+++ b/protocols/CMakeLists.txt
@@ -13,10 +13,21 @@ WAYLAND_ADD_PROTOCOL_SERVER(proto-server-desktop-shell
         desktop-shell
 )
 
+WAYLAND_ADD_PROTOCOL_CLIENT(proto-client-swaylock
+        swaylock.xml
+        swaylock
+)
+WAYLAND_ADD_PROTOCOL_SERVER(proto-server-swaylock
+        swaylock.xml
+        swaylock
+)
+
 add_library(sway-protocols
         ${proto-client-xdg-shell}
         ${proto-client-desktop-shell}
         ${proto-server-desktop-shell}
+        ${proto-client-swaylock}
+        ${proto-server-swaylock}
         )
 
 set(PROTOCOLS_INCLUDE_DIRS ${CMAKE_BINARY_DIR}/protocols PARENT_SCOPE)
diff --git a/protocols/libsway-protocols.a b/protocols/libsway-protocols.a
new file mode 100644
index 00000000..284f46c2
--- /dev/null
+++ b/protocols/libsway-protocols.a
diff --git a/protocols/swaylock.xml b/protocols/swaylock.xml
new file mode 100644
index 00000000..c7a102dd
--- /dev/null
+++ b/protocols/swaylock.xml
@@ -0,0 +1,18 @@
+<protocol name="lock">
+
+  <interface name="lock" version="1">
+    <description summary="create lock screen UIs">
+      The Weston desktop-shell protocol's locking functionality depends more
+      on the behavior of the compositor than of a screen locking client, so
+      another protocol is necessary.
+    </description>
+
+    <request name="set_lock_surface">
+      <arg name="output" type="object" interface="wl_output"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+
+    <request name="unlock"/>
+
+  </interface>
+</protocol>
diff --git a/sway/extensions.c b/sway/extensions.c
index 1f8e9a7c..18621015 100644
--- a/sway/extensions.c
+++ b/sway/extensions.c
@@ -8,6 +8,31 @@
 
 struct desktop_shell_state desktop_shell;
 
+void background_surface_destructor(struct wl_resource *resource) {
+        sway_log(L_DEBUG, "Background surface killed");
+        int i;
+        for (i = 0; i < desktop_shell.backgrounds->length; ++i) {
+                struct background_config *config = desktop_shell.backgrounds->items[i];
+                if (config->resource == resource) {
+                        list_del(desktop_shell.backgrounds, i);
+                        break;
+                }
+        }
+}
+
+void panel_surface_destructor(struct wl_resource *resource) {
+        sway_log(L_DEBUG, "Panel surface killed");
+        int i;
+        for (i = 0; i < desktop_shell.panels->length; ++i) {
+                struct panel_config *config = desktop_shell.panels->items[i];
+                if (config->resource == resource) {
+                        list_del(desktop_shell.panels, i);
+                        arrange_windows(&root_container, -1, -1);
+                        break;
+                }
+        }
+}
+
 static void set_background(struct wl_client *client, struct wl_resource *resource,
                 struct wl_resource *_output, struct wl_resource *surface) {
         wlc_handle output = wlc_handle_from_wl_output_resource(_output);
@@ -18,7 +43,9 @@ static void set_background(struct wl_client *client, struct wl_resource *resourc
         struct background_config *config = malloc(sizeof(struct background_config));
         config->output = output;
         config->surface = wlc_resource_from_wl_surface_resource(surface);
+        config->resource = surface;
         list_add(desktop_shell.backgrounds, config);
+        wl_resource_set_destructor(surface, background_surface_destructor);
 }
 
 static void set_panel(struct wl_client *client, struct wl_resource *resource,
@@ -31,7 +58,9 @@ static void set_panel(struct wl_client *client, struct wl_resource *resource,
         struct panel_config *config = malloc(sizeof(struct panel_config));
         config->output = output;
         config->surface = wlc_resource_from_wl_surface_resource(surface);
+        config->resource = surface;
         list_add(desktop_shell.panels, config);
+        wl_resource_set_destructor(surface, panel_surface_destructor);
         desktop_shell.panel_size = *wlc_surface_get_size(config->surface);
         arrange_windows(&root_container, -1, -1);
 }
diff --git a/wayland/libsway-wayland.a b/wayland/libsway-wayland.a
new file mode 100644
index 00000000..ac0f682c
--- /dev/null
+++ b/wayland/libsway-wayland.a