Merge pull request #720 from acrisci/xdg-positioner

xdg-positioner

4 files changed, 430 insertions, 52 deletions

diff --git a/include/wlr/types/wlr_xdg_shell_v6.h b/include/wlr/types/wlr_xdg_shell_v6.h
index 0867b2f6..d01240eb 100644
--- a/include/wlr/types/wlr_xdg_shell_v6.h
+++ b/include/wlr/types/wlr_xdg_shell_v6.h
@@ -4,6 +4,7 @@
 #include <wayland-server.h>
 #include <wlr/types/wlr_box.h>
 #include <wlr/types/wlr_seat.h>
+#include "xdg-shell-unstable-v6-protocol.h"
 
 struct wlr_xdg_shell_v6 {
 	struct wl_global *wl_global;
@@ -32,6 +33,21 @@ struct wlr_xdg_client_v6 {
 	struct wl_event_source *ping_timer;
 };
 
+struct wlr_xdg_positioner_v6 {
+	struct wlr_box anchor_rect;
+	enum zxdg_positioner_v6_anchor anchor;
+	enum zxdg_positioner_v6_gravity gravity;
+	enum zxdg_positioner_v6_constraint_adjustment constraint_adjustment;
+
+	struct {
+		int32_t width, height;
+	} size;
+
+	struct {
+		int32_t x, y;
+	} offset;
+};
+
 struct wlr_xdg_popup_v6 {
 	struct wlr_xdg_surface_v6 *base;
 	struct wl_list link;
@@ -45,6 +61,8 @@ struct wlr_xdg_popup_v6 {
 	// geometry of the parent surface
 	struct wlr_box geometry;
 
+	struct wlr_xdg_positioner_v6 positioner;
+
 	struct wl_list grab_link; // wlr_xdg_popup_grab_v6::popups
 };
 
@@ -229,4 +247,46 @@ struct wlr_xdg_surface_v6 *wlr_xdg_surface_v6_popup_at(
 		struct wlr_xdg_surface_v6 *surface, double sx, double sy,
 		double *popup_sx, double *popup_sy);
 
+/**
+ * Get the geometry for this positioner based on the anchor rect, gravity, and
+ * size of this positioner.
+ */
+struct wlr_box wlr_xdg_positioner_v6_get_geometry(
+		struct wlr_xdg_positioner_v6 *positioner);
+
+/**
+ * Get the anchor point for this popup in the toplevel parent's coordinate system.
+ */
+void wlr_xdg_popup_v6_get_anchor_point(struct wlr_xdg_popup_v6 *popup,
+		int *toplevel_sx, int *toplevel_sy);
+
+/**
+ * Convert the given coordinates in the popup coordinate system to the toplevel
+ * surface coordinate system.
+ */
+void wlr_xdg_popup_v6_get_toplevel_coords(struct wlr_xdg_popup_v6 *popup,
+		int popup_sx, int popup_sy, int *toplevel_sx, int *toplevel_sy);
+
+/**
+ * Set the geometry of this popup to unconstrain it according to its
+ * xdg-positioner rules. The box should be in the popup's root toplevel parent
+ * surface coordinate system.
+ */
+void wlr_xdg_popup_v6_unconstrain_from_box(struct wlr_xdg_popup_v6 *popup,
+		struct wlr_box *toplevel_sx_box);
+
+/**
+  Invert the right/left anchor and gravity for this positioner. This can be
+  used to "flip" the positioner around the anchor rect in the x direction.
+ */
+void wlr_positioner_v6_invert_x(
+		struct wlr_xdg_positioner_v6 *positioner);
+
+/**
+  Invert the top/bottom anchor and gravity for this positioner. This can be
+  used to "flip" the positioner around the anchor rect in the y direction.
+ */
+void wlr_positioner_v6_invert_y(
+		struct wlr_xdg_positioner_v6 *positioner);
+
 #endif
diff --git a/rootston/xdg_shell_v6.c b/rootston/xdg_shell_v6.c
index ad33c4b0..39e8a4b7 100644
--- a/rootston/xdg_shell_v6.c
+++ b/rootston/xdg_shell_v6.c
@@ -50,6 +50,58 @@ static void popup_handle_new_popup(struct wl_listener *listener, void *data) {
 	popup_create(popup->view_child.view, wlr_popup);
 }
 
+static void popup_unconstrain(struct roots_xdg_popup_v6 *popup) {
+	// get the output of the popup's positioner anchor point and convert it to
+	// the toplevel parent's coordinate system and then pass it to
+	// wlr_xdg_popup_v6_unconstrain_from_box
+
+	// TODO: unconstrain popups for rotated windows
+	if (popup->view_child.view->rotation != 0.0) {
+		return;
+	}
+
+	struct roots_view *view = popup->view_child.view;
+	struct wlr_output_layout *layout = view->desktop->layout;
+	struct wlr_xdg_popup_v6 *wlr_popup = popup->wlr_popup;
+
+	int anchor_lx, anchor_ly;
+	wlr_xdg_popup_v6_get_anchor_point(wlr_popup, &anchor_lx, &anchor_ly);
+
+	int popup_lx, popup_ly;
+	wlr_xdg_popup_v6_get_toplevel_coords(wlr_popup, wlr_popup->geometry.x,
+		wlr_popup->geometry.y, &popup_lx, &popup_ly);
+	popup_lx += view->x;
+	popup_ly += view->y;
+
+	anchor_lx += popup_lx;
+	anchor_ly += popup_ly;
+
+	double dest_x = 0, dest_y = 0;
+	wlr_output_layout_closest_point(layout, NULL, anchor_lx, anchor_ly,
+		&dest_x, &dest_y);
+
+	struct wlr_output *output =
+		wlr_output_layout_output_at(layout, dest_x, dest_y);
+
+	if (output == NULL) {
+		return;
+	}
+
+	int width = 0, height = 0;
+	wlr_output_effective_resolution(output, &width, &height);
+
+	// the output box expressed in the coordinate system of the toplevel parent
+	// of the popup
+	struct wlr_box output_toplevel_sx_box = {
+		.x = output->lx - view->x,
+		.y = output->ly - view->y,
+		.width = width,
+		.height = height
+	};
+
+	wlr_xdg_popup_v6_unconstrain_from_box(popup->wlr_popup, &output_toplevel_sx_box);
+}
+
 static struct roots_xdg_popup_v6 *popup_create(struct roots_view *view,
 		struct wlr_xdg_popup_v6 *wlr_popup) {
 	struct roots_xdg_popup_v6 *popup =
@@ -68,6 +120,9 @@ static struct roots_xdg_popup_v6 *popup_create(struct roots_view *view,
 	wl_signal_add(&wlr_popup->base->events.unmap, &popup->unmap);
 	popup->new_popup.notify = popup_handle_new_popup;
 	wl_signal_add(&wlr_popup->base->events.new_popup, &popup->new_popup);
+
+	popup_unconstrain(popup);
+
 	return popup;
 }
 
diff --git a/types/wlr_output_layout.c b/types/wlr_output_layout.c
index 2462bdd2..fdeef387 100644
--- a/types/wlr_output_layout.c
+++ b/types/wlr_output_layout.c
@@ -313,6 +313,10 @@ void wlr_output_layout_output_coords(struct wlr_output_layout *layout,
 void wlr_output_layout_closest_point(struct wlr_output_layout *layout,
 		struct wlr_output *reference, double x, double y, double *dest_x,
 		double *dest_y) {
+	if (dest_x == NULL && dest_y == NULL) {
+		return;
+	}
+
 	double min_x = DBL_MAX, min_y = DBL_MAX, min_distance = DBL_MAX;
 	struct wlr_output_layout_output *l_output;
 	wl_list_for_each(l_output, &layout->outputs, link) {
@@ -339,8 +343,12 @@ void wlr_output_layout_closest_point(struct wlr_output_layout *layout,
 		}
 	}
 
-	*dest_x = min_x;
-	*dest_y = min_y;
+	if (dest_x) {
+		*dest_x = min_x;
+	}
+	if (dest_y) {
+		*dest_y = min_y;
+	}
 }
 
 struct wlr_box *wlr_output_layout_get_box(
diff --git a/types/wlr_xdg_shell_v6.c b/types/wlr_xdg_shell_v6.c
index 65b461b7..64d44f22 100644
--- a/types/wlr_xdg_shell_v6.c
+++ b/types/wlr_xdg_shell_v6.c
@@ -16,24 +16,11 @@
 static const char *wlr_desktop_xdg_toplevel_role = "xdg_toplevel_v6";
 static const char *wlr_desktop_xdg_popup_role = "xdg_popup_v6";
 
-struct wlr_xdg_positioner_v6 {
+struct wlr_xdg_positioner_v6_resource {
 	struct wl_resource *resource;
-
-	struct wlr_box anchor_rect;
-	enum zxdg_positioner_v6_anchor anchor;
-	enum zxdg_positioner_v6_gravity gravity;
-	enum zxdg_positioner_v6_constraint_adjustment constraint_adjustment;
-
-	struct {
-		int32_t width, height;
-	} size;
-
-	struct {
-		int32_t x, y;
-	} offset;
+	struct wlr_xdg_positioner_v6 attrs;
 };
 
-
 static void resource_handle_destroy(struct wl_client *client,
 		struct wl_resource *resource) {
 	wl_resource_destroy(resource);
@@ -110,8 +97,8 @@ static void xdg_keyboard_grab_enter(struct wlr_seat_keyboard_grab *grab,
 	// keyboard focus should remain on the popup
 }
 
-static void xdg_keyboard_grab_key(struct wlr_seat_keyboard_grab *grab, uint32_t time,
-		uint32_t key, uint32_t state) {
+static void xdg_keyboard_grab_key(struct wlr_seat_keyboard_grab *grab,
+		uint32_t time, uint32_t key, uint32_t state) {
 	wlr_seat_keyboard_send_key(grab->seat, time, key, state);
 }
 
@@ -300,7 +287,7 @@ static void xdg_surface_destroy(struct wlr_xdg_surface_v6 *surface) {
 static const struct zxdg_positioner_v6_interface
 	zxdg_positioner_v6_implementation;
 
-static struct wlr_xdg_positioner_v6 *xdg_positioner_from_resource(
+static struct wlr_xdg_positioner_v6_resource *xdg_positioner_from_resource(
 		struct wl_resource *resource) {
 	assert(wl_resource_instance_of(resource, &zxdg_positioner_v6_interface,
 		&zxdg_positioner_v6_implementation));
@@ -308,14 +295,14 @@ static struct wlr_xdg_positioner_v6 *xdg_positioner_from_resource(
 }
 
 static void xdg_positioner_destroy(struct wl_resource *resource) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 	free(positioner);
 }
 
 static void xdg_positioner_handle_set_size(struct wl_client *client,
 		struct wl_resource *resource, int32_t width, int32_t height) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 
 	if (width < 1 || height < 1) {
@@ -325,14 +312,14 @@ static void xdg_positioner_handle_set_size(struct wl_client *client,
 		return;
 	}
 
-	positioner->size.width = width;
-	positioner->size.height = height;
+	positioner->attrs.size.width = width;
+	positioner->attrs.size.height = height;
 }
 
 static void xdg_positioner_handle_set_anchor_rect(struct wl_client *client,
 		struct wl_resource *resource, int32_t x, int32_t y, int32_t width,
 		int32_t height) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 
 	if (width < 1 || height < 1) {
@@ -342,15 +329,15 @@ static void xdg_positioner_handle_set_anchor_rect(struct wl_client *client,
 		return;
 	}
 
-	positioner->anchor_rect.x = x;
-	positioner->anchor_rect.y = y;
-	positioner->anchor_rect.width = width;
-	positioner->anchor_rect.height = height;
+	positioner->attrs.anchor_rect.x = x;
+	positioner->attrs.anchor_rect.y = y;
+	positioner->attrs.anchor_rect.width = width;
+	positioner->attrs.anchor_rect.height = height;
 }
 
 static void xdg_positioner_handle_set_anchor(struct wl_client *client,
 		struct wl_resource *resource, uint32_t anchor) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 
 	if (((anchor & ZXDG_POSITIONER_V6_ANCHOR_TOP ) &&
@@ -363,12 +350,12 @@ static void xdg_positioner_handle_set_anchor(struct wl_client *client,
 		return;
 	}
 
-	positioner->anchor = anchor;
+	positioner->attrs.anchor = anchor;
 }
 
 static void xdg_positioner_handle_set_gravity(struct wl_client *client,
 		struct wl_resource *resource, uint32_t gravity) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 
 	if (((gravity & ZXDG_POSITIONER_V6_GRAVITY_TOP) &&
@@ -381,25 +368,25 @@ static void xdg_positioner_handle_set_gravity(struct wl_client *client,
 		return;
 	}
 
-	positioner->gravity = gravity;
+	positioner->attrs.gravity = gravity;
 }
 
 static void xdg_positioner_handle_set_constraint_adjustment(
 		struct wl_client *client, struct wl_resource *resource,
 		uint32_t constraint_adjustment) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 
-	positioner->constraint_adjustment = constraint_adjustment;
+	positioner->attrs.constraint_adjustment = constraint_adjustment;
 }
 
 static void xdg_positioner_handle_set_offset(struct wl_client *client,
 		struct wl_resource *resource, int32_t x, int32_t y) {
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(resource);
 
-	positioner->offset.x = x;
-	positioner->offset.y = y;
+	positioner->attrs.offset.x = x;
+	positioner->attrs.offset.y = y;
 }
 
 static const struct zxdg_positioner_v6_interface
@@ -416,8 +403,8 @@ static const struct zxdg_positioner_v6_interface
 
 static void xdg_shell_handle_create_positioner(struct wl_client *wl_client,
 		struct wl_resource *resource, uint32_t id) {
-	struct wlr_xdg_positioner_v6 *positioner =
-		calloc(1, sizeof(struct wlr_xdg_positioner_v6));
+	struct wlr_xdg_positioner_v6_resource *positioner =
+		calloc(1, sizeof(struct wlr_xdg_positioner_v6_resource));
 	if (positioner == NULL) {
 		wl_client_post_no_memory(wl_client);
 		return;
@@ -438,9 +425,8 @@ static void xdg_shell_handle_create_positioner(struct wl_client *wl_client,
 		positioner, xdg_positioner_destroy);
 }
 
-static struct wlr_box xdg_positioner_get_geometry(
-		struct wlr_xdg_positioner_v6 *positioner,
-		struct wlr_xdg_surface_v6 *surface, struct wlr_xdg_surface_v6 *parent) {
+struct wlr_box wlr_xdg_positioner_v6_get_geometry(
+		struct wlr_xdg_positioner_v6 *positioner) {
 	struct wlr_box geometry = {
 		.x = positioner->offset.x,
 		.y = positioner->offset.y,
@@ -493,7 +479,6 @@ static struct wlr_box xdg_positioner_get_geometry(
 	return geometry;
 }
 
-
 static const struct zxdg_popup_v6_interface zxdg_popup_v6_implementation;
 
 static struct wlr_xdg_surface_v6 *xdg_surface_from_xdg_popup_resource(
@@ -595,10 +580,11 @@ static void xdg_surface_handle_get_popup(struct wl_client *client,
 		xdg_surface_from_resource(resource);
 	struct wlr_xdg_surface_v6 *parent =
 		xdg_surface_from_resource(parent_resource);
-	struct wlr_xdg_positioner_v6 *positioner =
+	struct wlr_xdg_positioner_v6_resource *positioner =
 		xdg_positioner_from_resource(positioner_resource);
 
-	if (positioner->size.width == 0 || positioner->anchor_rect.width == 0) {
+	if (positioner->attrs.size.width == 0 ||
+			positioner->attrs.anchor_rect.width == 0) {
 		wl_resource_post_error(resource,
 			ZXDG_SHELL_V6_ERROR_INVALID_POSITIONER,
 			"positioner object is not complete");
@@ -629,7 +615,12 @@ static void xdg_surface_handle_get_popup(struct wl_client *client,
 	surface->popup->base = surface;
 	surface->popup->parent = parent;
 	surface->popup->geometry =
-		xdg_positioner_get_geometry(positioner, surface, parent);
+		wlr_xdg_positioner_v6_get_geometry(&positioner->attrs);
+
+	// positioner properties
+	memcpy(&surface->popup->positioner, &positioner->attrs,
+		sizeof(struct wlr_xdg_positioner_v6));
+
 	wl_list_insert(&parent->popups, &surface->popup->link);
 
 	wl_resource_set_implementation(surface->popup->resource,
@@ -639,7 +630,6 @@ static void xdg_surface_handle_get_popup(struct wl_client *client,
 	wlr_signal_emit_safe(&parent->events.new_popup, surface->popup);
 }
 
-
 static const struct zxdg_toplevel_v6_interface zxdg_toplevel_v6_implementation;
 
 static struct wlr_xdg_surface_v6 *xdg_surface_from_xdg_toplevel_resource(
@@ -1101,7 +1091,8 @@ static void wlr_xdg_toplevel_v6_send_configure(
 	if (surface->toplevel->server_pending.maximized) {
 		s = wl_array_add(&states, sizeof(uint32_t));
 		if (!s) {
-			wlr_log(L_ERROR, "Could not allocate state for maximized xdg_toplevel");
+			wlr_log(L_ERROR,
+				"Could not allocate state for maximized xdg_toplevel");
 			goto error_out;
 		}
 		*s = ZXDG_TOPLEVEL_V6_STATE_MAXIMIZED;
@@ -1109,7 +1100,8 @@ static void wlr_xdg_toplevel_v6_send_configure(
 	if (surface->toplevel->server_pending.fullscreen) {
 		s = wl_array_add(&states, sizeof(uint32_t));
 		if (!s) {
-			wlr_log(L_ERROR, "Could not allocate state for fullscreen xdg_toplevel");
+			wlr_log(L_ERROR,
+				"Could not allocate state for fullscreen xdg_toplevel");
 			goto error_out;
 		}
 		*s = ZXDG_TOPLEVEL_V6_STATE_FULLSCREEN;
@@ -1117,7 +1109,8 @@ static void wlr_xdg_toplevel_v6_send_configure(
 	if (surface->toplevel->server_pending.resizing) {
 		s = wl_array_add(&states, sizeof(uint32_t));
 		if (!s) {
-			wlr_log(L_ERROR, "Could not allocate state for resizing xdg_toplevel");
+			wlr_log(L_ERROR,
+				"Could not allocate state for resizing xdg_toplevel");
 			goto error_out;
 		}
 		*s = ZXDG_TOPLEVEL_V6_STATE_RESIZING;
@@ -1125,7 +1118,8 @@ static void wlr_xdg_toplevel_v6_send_configure(
 	if (surface->toplevel->server_pending.activated) {
 		s = wl_array_add(&states, sizeof(uint32_t));
 		if (!s) {
-			wlr_log(L_ERROR, "Could not allocate state for activated xdg_toplevel");
+			wlr_log(L_ERROR,
+				"Could not allocate state for activated xdg_toplevel");
 			goto error_out;
 		}
 		*s = ZXDG_TOPLEVEL_V6_STATE_ACTIVATED;
@@ -1639,3 +1633,264 @@ struct wlr_xdg_surface_v6 *wlr_xdg_surface_v6_popup_at(
 
 	return NULL;
 }
+
+void wlr_xdg_popup_v6_get_anchor_point(struct wlr_xdg_popup_v6 *popup,
+		int *root_sx, int *root_sy) {
+	struct wlr_box rect = popup->positioner.anchor_rect;
+	enum zxdg_positioner_v6_anchor anchor = popup->positioner.anchor;
+	int sx = 0, sy = 0;
+
+	if (anchor == ZXDG_POSITIONER_V6_ANCHOR_NONE) {
+		sx = (rect.x + rect.width) / 2;
+		sy = (rect.y + rect.height) / 2;
+	} else if (anchor == ZXDG_POSITIONER_V6_ANCHOR_TOP) {
+		sx = (rect.x + rect.width) / 2;
+		sy = rect.y;
+	} else if (anchor == ZXDG_POSITIONER_V6_ANCHOR_BOTTOM) {
+		sx = (rect.x + rect.width) / 2;
+		sy = rect.y + rect.height;
+	} else if (anchor == ZXDG_POSITIONER_V6_ANCHOR_LEFT) {
+		sx = rect.x;
+		sy = (rect.y + rect.height) / 2;
+	} else if (anchor == ZXDG_POSITIONER_V6_ANCHOR_RIGHT) {
+		sx = rect.x + rect.width;
+		sy = (rect.y + rect.height) / 2;
+	} else if (anchor == (ZXDG_POSITIONER_V6_ANCHOR_TOP |
+				ZXDG_POSITIONER_V6_ANCHOR_LEFT)) {
+		sx = rect.x;
+		sy = rect.y;
+	} else if (anchor == (ZXDG_POSITIONER_V6_ANCHOR_TOP |
+				ZXDG_POSITIONER_V6_ANCHOR_RIGHT)) {
+		sx = rect.x + rect.width;
+		sy = rect.y;
+	} else if (anchor == (ZXDG_POSITIONER_V6_ANCHOR_BOTTOM |
+				ZXDG_POSITIONER_V6_ANCHOR_LEFT)) {
+		sx = rect.x;
+		sy = rect.y + rect.height;
+	} else if (anchor == (ZXDG_POSITIONER_V6_ANCHOR_BOTTOM |
+				ZXDG_POSITIONER_V6_ANCHOR_RIGHT)) {
+		sx = rect.x + rect.width;
+		sy = rect.y + rect.height;
+	}
+
+	*root_sx = sx;
+	*root_sy = sy;
+}
+
+void wlr_xdg_popup_v6_get_toplevel_coords(struct wlr_xdg_popup_v6 *popup,
+		int popup_sx, int popup_sy, int *toplevel_sx, int *toplevel_sy) {
+	struct wlr_xdg_surface_v6 *parent = popup->parent;
+	while (parent != NULL && parent->role == WLR_XDG_SURFACE_V6_ROLE_POPUP) {
+		popup_sx += parent->popup->geometry.x;
+		popup_sy += parent->popup->geometry.y;
+		parent = parent->popup->parent;
+	}
+
+	assert(parent);
+
+	*toplevel_sx = popup_sx + parent->geometry.x;
+	*toplevel_sy = popup_sy + parent->geometry.y;
+
+}
+
+static void wlr_xdg_popup_v6_box_constraints(struct wlr_xdg_popup_v6 *popup,
+		struct wlr_box *toplevel_sx_box, int *offset_x, int *offset_y) {
+	int popup_width = popup->geometry.width;
+	int popup_height = popup->geometry.height;
+	int anchor_sx = 0, anchor_sy = 0;
+	wlr_xdg_popup_v6_get_anchor_point(popup, &anchor_sx, &anchor_sy);
+	int popup_sx = 0, popup_sy = 0;
+	wlr_xdg_popup_v6_get_toplevel_coords(popup, popup->geometry.x,
+		popup->geometry.y, &popup_sx, &popup_sy);
+	*offset_x = 0, *offset_y = 0;
+
+	if (popup_sx < toplevel_sx_box->x) {
+		*offset_x = toplevel_sx_box->x - popup_sx;
+	} else if (popup_sx + popup_width >
+			toplevel_sx_box->x + toplevel_sx_box->width) {
+		*offset_x = toplevel_sx_box->x + toplevel_sx_box->width -
+			(popup_sx + popup_width);
+	}
+
+	if (popup_sy < toplevel_sx_box->y) {
+		*offset_y = toplevel_sx_box->y - popup_sy;
+	} else if (popup_sy + popup_height >
+			toplevel_sx_box->y + toplevel_sx_box->height) {
+		*offset_y = toplevel_sx_box->y + toplevel_sx_box->height -
+			(popup_sy + popup_height);
+	}
+}
+
+static bool wlr_xdg_popup_v6_unconstrain_flip(struct wlr_xdg_popup_v6 *popup,
+		struct wlr_box *toplevel_sx_box) {
+	int offset_x = 0, offset_y = 0;
+	wlr_xdg_popup_v6_box_constraints(popup, toplevel_sx_box,
+		&offset_x, &offset_y);
+
+	if (!offset_x && !offset_y) {
+		return true;
+	}
+
+	bool flip_x = offset_x &&
+		(popup->positioner.constraint_adjustment &
+		 ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_FLIP_X);
+
+	bool flip_y = offset_y &&
+		(popup->positioner.constraint_adjustment &
+		 ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_FLIP_Y);
+
+	if (flip_x) {
+		wlr_positioner_v6_invert_x(&popup->positioner);
+	}
+	if (flip_y) {
+		wlr_positioner_v6_invert_y(&popup->positioner);
+	}
+
+	popup->geometry =
+		wlr_xdg_positioner_v6_get_geometry(&popup->positioner);
+
+	wlr_xdg_popup_v6_box_constraints(popup, toplevel_sx_box,
+		&offset_x, &offset_y);
+
+	if (!offset_x && !offset_y) {
+		// no longer constrained
+		return true;
+	}
+
+	// revert the positioner back if it didn't fix it and go to the next part
+	if (flip_x) {
+		wlr_positioner_v6_invert_x(&popup->positioner);
+	}
+	if (flip_y) {
+		wlr_positioner_v6_invert_y(&popup->positioner);
+	}
+
+	popup->geometry =
+		wlr_xdg_positioner_v6_get_geometry(&popup->positioner);
+
+	return false;
+}
+
+static bool wlr_xdg_popup_v6_unconstrain_slide(struct wlr_xdg_popup_v6 *popup,
+		struct wlr_box *toplevel_sx_box) {
+	int offset_x = 0, offset_y = 0;
+	wlr_xdg_popup_v6_box_constraints(popup, toplevel_sx_box,
+		&offset_x, &offset_y);
+
+	if (!offset_x && !offset_y) {
+		return true;
+	}
+
+	bool slide_x = offset_x &&
+		(popup->positioner.constraint_adjustment &
+		 ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_SLIDE_X);
+
+	bool slide_y = offset_x &&
+		(popup->positioner.constraint_adjustment &
+		 ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_SLIDE_Y);
+
+	if (slide_x) {
+		popup->geometry.x += offset_x;
+	}
+
+	if (slide_y) {
+		popup->geometry.y += offset_y;
+	}
+
+	int toplevel_x = 0, toplevel_y = 0;
+	wlr_xdg_popup_v6_get_toplevel_coords(popup, popup->geometry.x,
+		popup->geometry.y, &toplevel_x, &toplevel_y);
+
+	if (slide_x && toplevel_x < toplevel_sx_box->x) {
+		popup->geometry.x += toplevel_sx_box->x - toplevel_x;
+	}
+	if (slide_y && toplevel_y < toplevel_sx_box->y) {
+		popup->geometry.y += toplevel_sx_box->y - toplevel_y;
+	}
+
+	wlr_xdg_popup_v6_box_constraints(popup, toplevel_sx_box,
+		&offset_x, &offset_y);
+
+	return !offset_x && !offset_y;
+}
+
+static bool wlr_xdg_popup_v6_unconstrain_resize(struct wlr_xdg_popup_v6 *popup,
+		struct wlr_box *toplevel_sx_box) {
+	int offset_x, offset_y;
+	wlr_xdg_popup_v6_box_constraints(popup, toplevel_sx_box,
+		&offset_x, &offset_y);
+
+	if (!offset_x && !offset_y) {
+		return true;
+	}
+
+	bool resize_x = offset_x &&
+		(popup->positioner.constraint_adjustment &
+		 ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_RESIZE_X);
+
+	bool resize_y = offset_x &&
+		(popup->positioner.constraint_adjustment &
+		 ZXDG_POSITIONER_V6_CONSTRAINT_ADJUSTMENT_RESIZE_Y);
+
+	if (resize_x) {
+		popup->geometry.width -= offset_x;
+	}
+	if (resize_y) {
+		popup->geometry.height -= offset_y;
+	}
+
+	wlr_xdg_popup_v6_box_constraints(popup, toplevel_sx_box,
+		&offset_y, &offset_y);
+
+	return !offset_x && !offset_y;
+}
+
+void wlr_xdg_popup_v6_unconstrain_from_box(struct wlr_xdg_popup_v6 *popup,
+		struct wlr_box *toplevel_sx_box) {
+	if (wlr_xdg_popup_v6_unconstrain_flip(popup, toplevel_sx_box)) {
+		return;
+	}
+	if (wlr_xdg_popup_v6_unconstrain_slide(popup, toplevel_sx_box)) {
+		return;
+	}
+	if (wlr_xdg_popup_v6_unconstrain_resize(popup, toplevel_sx_box)) {
+		return;
+	}
+}
+
+void wlr_positioner_v6_invert_x(struct wlr_xdg_positioner_v6 *positioner) {
+	if (positioner->anchor & ZXDG_POSITIONER_V6_ANCHOR_LEFT) {
+		positioner->anchor &= ~ZXDG_POSITIONER_V6_ANCHOR_LEFT;
+		positioner->anchor |= ZXDG_POSITIONER_V6_ANCHOR_RIGHT;
+	} else if (positioner->anchor & ZXDG_POSITIONER_V6_ANCHOR_RIGHT) {
+		positioner->anchor &= ~ZXDG_POSITIONER_V6_ANCHOR_RIGHT;
+		positioner->anchor |= ZXDG_POSITIONER_V6_ANCHOR_LEFT;
+	}
+
+	if (positioner->gravity & ZXDG_POSITIONER_V6_GRAVITY_RIGHT) {
+		positioner->gravity &= ~ZXDG_POSITIONER_V6_GRAVITY_RIGHT;
+		positioner->gravity |= ZXDG_POSITIONER_V6_GRAVITY_LEFT;
+	} else if (positioner->gravity & ZXDG_POSITIONER_V6_GRAVITY_LEFT) {
+		positioner->gravity &= ~ZXDG_POSITIONER_V6_GRAVITY_LEFT;
+		positioner->gravity |= ZXDG_POSITIONER_V6_GRAVITY_RIGHT;
+	}
+}
+
+void wlr_positioner_v6_invert_y(
+		struct wlr_xdg_positioner_v6 *positioner) {
+	if (positioner->anchor & ZXDG_POSITIONER_V6_ANCHOR_TOP) {
+		positioner->anchor &= ~ZXDG_POSITIONER_V6_ANCHOR_TOP;
+		positioner->anchor |= ZXDG_POSITIONER_V6_ANCHOR_BOTTOM;
+	} else if (positioner->anchor & ZXDG_POSITIONER_V6_ANCHOR_BOTTOM) {
+		positioner->anchor &= ~ZXDG_POSITIONER_V6_ANCHOR_BOTTOM;
+		positioner->anchor |= ZXDG_POSITIONER_V6_ANCHOR_TOP;
+	}
+
+	if (positioner->gravity & ZXDG_POSITIONER_V6_GRAVITY_TOP) {
+		positioner->gravity &= ~ZXDG_POSITIONER_V6_GRAVITY_TOP;
+		positioner->gravity |= ZXDG_POSITIONER_V6_GRAVITY_BOTTOM;
+	} else if (positioner->gravity & ZXDG_POSITIONER_V6_GRAVITY_BOTTOM) {
+		positioner->gravity &= ~ZXDG_POSITIONER_V6_GRAVITY_BOTTOM;
+		positioner->gravity |= ZXDG_POSITIONER_V6_GRAVITY_TOP;
+	}
+}