xdg-shell: add support for v6

This adds the suspended toplevel state

include/wlr/types/wlr_xdg_shell.h

@@ -127,7 +127,7 @@ enum wlr_xdg_surface_role {
 };
 
 struct wlr_xdg_toplevel_state {
-	bool maximized, fullscreen, resizing, activated;
+	bool maximized, fullscreen, resizing, activated, suspended;
 	uint32_t tiled; // enum wlr_edges
 	int32_t width, height;
 	int32_t max_width, max_height;
@@ -148,7 +148,7 @@ enum wlr_xdg_toplevel_configure_field {
 
 struct wlr_xdg_toplevel_configure {
 	uint32_t fields; // enum wlr_xdg_toplevel_configure_field
-	bool maximized, fullscreen, resizing, activated;
+	bool maximized, fullscreen, resizing, activated, suspended;
 	uint32_t tiled; // enum wlr_edges
 	int32_t width, height;
 	struct {
@@ -383,6 +383,13 @@ uint32_t wlr_xdg_toplevel_set_bounds(struct wlr_xdg_toplevel *toplevel,
 uint32_t wlr_xdg_toplevel_set_wm_capabilities(struct wlr_xdg_toplevel *toplevel,
 		uint32_t caps);
 
+/**
+ * Request that this toplevel consider itself suspended or not
+ * suspended. Returns the associated configure serial.
+ */
+uint32_t wlr_xdg_toplevel_set_suspended(struct wlr_xdg_toplevel *toplevel,
+		bool suspended);
+
 /**
  * Request that this toplevel closes.
  */

types/xdg_shell/wlr_xdg_shell.c

@@ -2,7 +2,7 @@
 #include <stdlib.h>
 #include "types/wlr_xdg_shell.h"
 
-#define WM_BASE_VERSION 5
+#define WM_BASE_VERSION 6
 
 static const struct xdg_wm_base_interface xdg_shell_impl;
 

types/xdg_shell/wlr_xdg_toplevel.c

@@ -14,6 +14,7 @@ void handle_xdg_toplevel_ack_configure(
 	toplevel->pending.resizing = configure->resizing;
 	toplevel->pending.activated = configure->activated;
 	toplevel->pending.tiled = configure->tiled;
+	toplevel->pending.suspended = configure->suspended;
 
 	toplevel->pending.width = configure->width;
 	toplevel->pending.height = configure->height;
@@ -99,6 +100,11 @@ struct wlr_xdg_toplevel_configure *send_xdg_toplevel_configure(
 			states[nstates++] = XDG_TOPLEVEL_STATE_MAXIMIZED;
 		}
 	}
+
+	if (configure->suspended &&
+			version >= XDG_TOPLEVEL_STATE_SUSPENDED_SINCE_VERSION) {
+		states[nstates++] = XDG_TOPLEVEL_STATE_SUSPENDED;
+	}
 	assert(nstates <= sizeof(states) / sizeof(states[0]));
 
 	int32_t width = configure->width;
@@ -617,3 +623,11 @@ uint32_t wlr_xdg_toplevel_set_wm_capabilities(struct wlr_xdg_toplevel *toplevel,
 	toplevel->scheduled.wm_capabilities = caps;
 	return wlr_xdg_surface_schedule_configure(toplevel->base);
 }
+
+uint32_t wlr_xdg_toplevel_set_suspended(struct wlr_xdg_toplevel *toplevel,
+		bool suspended) {
+	assert(toplevel->base->client->shell->version >=
+		XDG_TOPLEVEL_STATE_SUSPENDED_SINCE_VERSION);
+	toplevel->scheduled.suspended = suspended;
+	return wlr_xdg_surface_schedule_configure(toplevel->base);
+}