common: flesh out enum lab_edge and prefer over wlr_edges/wlr_direction

I like the new common/edge.h. I don't like how inconsistently we use it.

Current situation:

 - enum wlr_edges and wlr_direction are designed to be used as bitset,
   and are defined compatibly

 - enum lab_edge is *also* designed to be used as bitset, but
   incompatible with the others (LEFT/RIGHT come before UP/DOWN)

 - we use an inconsistent mix of all three *AND* uint32_t (usually with
   the WLR_EDGE constants rather than the LAB_EDGE constants), and
   convert between them on an ad-hoc basis, sometimes implicitly

Let's clean this up:

 - reorder enum lab_edge to be compatible with the two wlr enums
   (check this by static_assert)

 - use TOP/BOTTOM naming rather than UP/DOWN (matches wlr_edges)

 - add constants for the remaining possible combinations of the 4 edges

 - use lab_edge for all internal edge/direction fields, consistently

 - add lab_edge_is_cardinal() as a sanity check before casting to
   enum wlr_direction, and then eliminate all of direction.c/h

Instead of "enum wlr_edges direction", we now have
"enum lab_edge direction" which is not that much better. At least we
are now clear that we're overloading one enum with two meanings.

include/common/direction.h

@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-#ifndef LABWC_DIRECTION_H
-#define LABWC_DIRECTION_H
-
-#include <wlr/types/wlr_output_layout.h>
-#include "common/edge.h"
-
-bool direction_from_edge(enum lab_edge edge, enum wlr_direction *direction);
-enum wlr_direction direction_get_opposite(enum wlr_direction direction);
-
-#endif /* LABWC_DIRECTION_H */

include/common/edge.h

@@ -2,34 +2,77 @@
 #ifndef LABWC_EDGE_H
 #define LABWC_EDGE_H
 
-#include <wayland-server-core.h>
+#include <stdbool.h>
 
 /**
- * Represents an edge or direction (e.g. window tiling, window motion)
+ * Unified/overloaded enum representing edges, corners, and directions.
+ * Used in many different contexts (moving, resizing, tiling) and with
+ * somewhat different semantics depending on context.
+ *
+ * Examples:
+ *   - LAB_EDGE_TOP can also mean "up" or "north".
+ *   - LAB_EDGES_TOP_LEFT can mean "top left corner" or "northwest".
+ *
+ * The enum is designed to be used as a bitset, and combinations of
+ * edges typically mean what you'd expect from the context. For example,
+ * LAB_EDGES_TOP_LEFT is used when resizing a view from its top-left
+ * corner, or when tiling a view in the top-left corner of an output.
+ *
+ * All 16 possible combinations of TOP/BOTTOM/LEFT/RIGHT are listed for
+ * completeness. Not all combinations make sense in all contexts.
+ *
+ * LAB_EDGE_NONE is sometimes used to mean "invalid".
+ *
+ * LAB_EDGE_ANY means "any edge or combination of edges (except NONE)"
+ * and is distinct from LAB_EDGE_ALL (which means all 4 edges).
+ *
+ * LAB_EDGE_TOP/BOTTOM/LEFT/RIGHT match the corresponding values of
+ * enum wlr_edges and enum wlr_direction, so that conversion between
+ * enums can be done with a simple cast.
  */
 enum lab_edge {
-	LAB_EDGE_INVALID = 0,
+	LAB_EDGE_NONE = 0,
 
-	LAB_EDGE_LEFT = (1 << 0),
+	LAB_EDGE_TOP = (1 << 0),    /* or UP */
-	LAB_EDGE_RIGHT = (1 << 1),
+	LAB_EDGE_BOTTOM = (1 << 1), /* or DOWN */
-	LAB_EDGE_UP = (1 << 2),
+	LAB_EDGE_LEFT = (1 << 2),
-	LAB_EDGE_DOWN = (1 << 3),
+	LAB_EDGE_RIGHT = (1 << 3),
 	LAB_EDGE_CENTER = (1 << 4), /* for window tiling */
 	LAB_EDGE_ANY = (1 << 5), /* for window rules */
 
-	/* for window tiling */
+	/* corners or ordinal directions (NW/NE/SW/SE) */
-	LAB_EDGE_UPLEFT = (LAB_EDGE_UP | LAB_EDGE_LEFT),
+	LAB_EDGES_TOP_LEFT = (LAB_EDGE_TOP | LAB_EDGE_LEFT),
-	LAB_EDGE_UPRIGHT = (LAB_EDGE_UP | LAB_EDGE_RIGHT),
+	LAB_EDGES_TOP_RIGHT = (LAB_EDGE_TOP | LAB_EDGE_RIGHT),
-	LAB_EDGE_DOWNLEFT = (LAB_EDGE_DOWN | LAB_EDGE_LEFT),
+	LAB_EDGES_BOTTOM_LEFT = (LAB_EDGE_BOTTOM | LAB_EDGE_LEFT),
-	LAB_EDGE_DOWNRIGHT = (LAB_EDGE_DOWN | LAB_EDGE_RIGHT),
+	LAB_EDGES_BOTTOM_RIGHT = (LAB_EDGE_BOTTOM | LAB_EDGE_RIGHT),
+
+	/* opposite edges */
+	LAB_EDGES_TOP_BOTTOM = (LAB_EDGE_TOP | LAB_EDGE_BOTTOM),
+	LAB_EDGES_LEFT_RIGHT = (LAB_EDGE_LEFT | LAB_EDGE_RIGHT),
+
+	/* all 4 edges */
+	LAB_EDGES_ALL = (LAB_EDGE_TOP | LAB_EDGE_BOTTOM |
+			LAB_EDGE_LEFT | LAB_EDGE_RIGHT),
+
+	/* 3-edge combinations (for completeness) */
+	LAB_EDGES_EXCEPT_TOP = (LAB_EDGES_ALL ^ LAB_EDGE_TOP),
+	LAB_EDGES_EXCEPT_BOTTOM = (LAB_EDGES_ALL ^ LAB_EDGE_BOTTOM),
+	LAB_EDGES_EXCEPT_LEFT = (LAB_EDGES_ALL ^ LAB_EDGE_LEFT),
+	LAB_EDGES_EXCEPT_RIGHT = (LAB_EDGES_ALL ^ LAB_EDGE_RIGHT),
 };
 
 enum lab_edge lab_edge_parse(const char *direction, bool tiled, bool any);
 
+/**
+ * Returns true if edge is TOP, BOTTOM, LEFT, or RIGHT
+ * (i.e. one of the four cardinal directions N/S/W/E)
+ */
+bool lab_edge_is_cardinal(enum lab_edge edge);
+
 /**
  * lab_edge_invert() - select the opposite of a provided edge
  *
- * Returns LAB_EDGE_INVALID for edges other than UP/DOWN/LEFT/RIGHT.
+ * Returns LAB_EDGE_NONE for edges other than TOP/BOTTOM/LEFT/RIGHT.
  *
  * @edge: edge to be inverted
  */

include/edges.h

@@ -4,7 +4,7 @@
 
 #include <limits.h>
 #include <stdbool.h>
-#include <stdint.h>
+#include "common/edge.h"
 #include "common/macros.h"
 
 struct border;
@@ -113,9 +113,10 @@ void edges_adjust_move_coords(struct view *view, struct border edges,
 	int *x, int *y, bool use_pending);
 
 void edges_adjust_resize_geom(struct view *view, struct border edges,
-	uint32_t resize_edges, struct wlr_box *geom, bool use_pending);
+	enum lab_edge resize_edges, struct wlr_box *geom, bool use_pending);
 
 bool edges_traverse_edge(struct edge current, struct edge target, struct edge edge);
 
 void edges_calculate_visibility(struct server *server, struct view *ignored_view);
+
 #endif /* LABWC_EDGES_H */

include/input/cursor.h

@@ -3,7 +3,7 @@
 #define LABWC_CURSOR_H
 
 #include <wlr/types/wlr_cursor.h>
-#include <wlr/util/edges.h>
+#include "common/edge.h"
 #include "ssd.h"
 
 struct view;
@@ -11,7 +11,6 @@ struct seat;
 struct server;
 struct wlr_surface;
 struct wlr_scene_node;
-enum wl_pointer_button_state;
 
 /* Cursors used internally by labwc */
 enum lab_cursors {
@@ -85,20 +84,19 @@ void cursor_set_visible(struct seat *seat, bool visible);
  * This is mostly important when either resizing a window using a
  * keyboard modifier or when using the Resize action from a keybind.
  */
-uint32_t cursor_get_resize_edges(struct wlr_cursor *cursor,
+enum lab_edge cursor_get_resize_edges(struct wlr_cursor *cursor,
 	struct cursor_context *ctx);
 
 /**
- * cursor_get_from_edge - translate wlroots edge enum to lab_cursor enum
+ * cursor_get_from_edge - translate lab_edge enum to lab_cursor enum
- * @resize_edges - WLR_EDGE_ combination like WLR_EDGE_TOP | WLR_EDGE_RIGHT
+ * @resize_edges - edge(s) being resized
  *
- * Returns LAB_CURSOR_DEFAULT on WLR_EDGE_NONE
  * Returns the appropriate lab_cursors enum if @resize_edges
  * is one of the 4 corners or one of the 4 edges.
  *
- * Asserts on invalid edge combinations like WLR_EDGE_LEFT | WLR_EDGE_RIGHT
+ * Returns LAB_CURSOR_DEFAULT on any other value.
  */
-enum lab_cursors cursor_get_from_edge(uint32_t resize_edges);
+enum lab_cursors cursor_get_from_edge(enum lab_edge resize_edges);
 
 /**
  * cursor_update_focus - update cursor focus, may update the cursor icon

include/labwc.h

@@ -209,7 +209,7 @@ struct server {
 	double grab_x, grab_y;
 	/* View geometry when interactive move/resize is requested */
 	struct wlr_box grab_box;
-	uint32_t resize_edges;
+	enum lab_edge resize_edges;
 
 	/*
 	 * 'active_view' is generally the view with keyboard-focus, updated with
@@ -426,7 +426,8 @@ void seat_focus_override_end(struct seat *seat);
  */
 void interactive_anchor_to_cursor(struct server *server, struct wlr_box *geo);
 
-void interactive_begin(struct view *view, enum input_mode mode, uint32_t edges);
+void interactive_begin(struct view *view, enum input_mode mode,
+	enum lab_edge edges);
 void interactive_finish(struct view *view);
 void interactive_cancel(struct view *view);
 
@@ -434,7 +435,7 @@ void interactive_cancel(struct view *view);
  * Returns the edge to snap a window to.
  * For example, if the output-relative cursor position (x,y) fulfills
  * x <= (<snapping><cornerRange>) and y <= (<snapping><range>),
- * then edge1=LAB_EDGE_UP and edge2=LAB_EDGE_LEFT.
+ * then edge1=LAB_EDGE_TOP and edge2=LAB_EDGE_LEFT.
  * The value of (edge1|edge2) can be passed to view_snap_to_edge().
  */
 bool edge_from_cursor(struct seat *seat, struct output **dest_output,

include/snap-constraints.h

@@ -2,21 +2,19 @@
 #ifndef LABWC_SNAP_CONSTRAINTS_H
 #define LABWC_SNAP_CONSTRAINTS_H
 
-#include <wlr/util/edges.h>
+#include "common/edge.h"
-
-#include "common/border.h"
-#include "view.h"
 
+struct view;
 struct wlr_box;
 
-void snap_constraints_set(struct view *view,
+void snap_constraints_set(struct view *view, enum lab_edge direction,
-	enum wlr_edges direction, struct wlr_box geom);
+	struct wlr_box geom);
 
 void snap_constraints_invalidate(struct view *view);
 
 void snap_constraints_update(struct view *view);
 
 struct wlr_box snap_constraints_effective(struct view *view,
-	enum wlr_edges direction, bool use_pending);
+	enum lab_edge direction, bool use_pending);
 
 #endif /* LABWC_SNAP_CONSTRAINTS_H */

include/ssd.h

@@ -2,8 +2,9 @@
 #ifndef LABWC_SSD_H
 #define LABWC_SSD_H
 
-#include <wayland-server-core.h>
 #include "common/border.h"
+#include "common/edge.h"
+#include "config/types.h"
 
 struct wlr_cursor;
 
@@ -101,7 +102,7 @@ struct view *ssd_button_get_view(const struct ssd_button *button);
 /* Public SSD helpers */
 enum ssd_part_type ssd_get_part_type(const struct ssd *ssd,
 	struct wlr_scene_node *node, struct wlr_cursor *cursor);
-uint32_t ssd_resize_edges(enum ssd_part_type type);
+enum lab_edge ssd_resize_edges(enum ssd_part_type type);
 bool ssd_part_contains(enum ssd_part_type whole, enum ssd_part_type candidate);
 enum lab_ssd_mode ssd_mode_parse(const char *mode);
 

include/view.h

@@ -180,7 +180,7 @@ struct view {
 	enum lab_tristate force_tearing;
 	bool visible_on_all_workspaces;
 	enum lab_edge tiled;
-	uint32_t edges_visible;  /* enum wlr_edges bitset */
+	enum lab_edge edges_visible;
 	bool inhibits_keybinds; /* also inhibits mousebinds */
 	xkb_layout_index_t keyboard_layout;
 

src/action.c

@@ -348,7 +348,7 @@ action_arg_from_xml_node(struct action *action, const char *nodename, const char
 			bool tiled = (action->type == ACTION_TYPE_TOGGLE_SNAP_TO_EDGE
 					|| action->type == ACTION_TYPE_SNAP_TO_EDGE);
 			enum lab_edge edge = lab_edge_parse(content, tiled, /*any*/ false);
-			if (edge == LAB_EDGE_INVALID) {
+			if (edge == LAB_EDGE_NONE) {
 				wlr_log(WLR_ERROR, "Invalid argument for action %s: '%s' (%s)",
 					action_names[action->type], argument, content);
 			} else {
@@ -462,7 +462,7 @@ action_arg_from_xml_node(struct action *action, const char *nodename, const char
 		if (!strcmp(argument, "direction")) {
 			enum lab_edge edge = lab_edge_parse(content,
 				/*tiled*/ false, /*any*/ false);
-			if (edge == LAB_EDGE_INVALID) {
+			if (edge == LAB_EDGE_NONE) {
 				wlr_log(WLR_ERROR, "Invalid argument for action %s: '%s' (%s)",
 					action_names[action->type], argument, content);
 			} else {
@@ -921,7 +921,7 @@ get_target_output(struct output *output, struct server *server,
 		target = output_from_name(server, output_name);
 	} else {
 		enum lab_edge edge =
-			action_get_int(action, "direction", LAB_EDGE_INVALID);
+			action_get_int(action, "direction", LAB_EDGE_NONE);
 		bool wrap = action_get_bool(action, "wrap", false);
 		target = output_get_adjacent(output, edge, wrap);
 	}
@@ -1144,7 +1144,8 @@ run_action(struct view *view, struct server *server, struct action *action,
 		break;
 	case ACTION_TYPE_MOVE:
 		if (view) {
-			interactive_begin(view, LAB_INPUT_STATE_MOVE, 0);
+			interactive_begin(view, LAB_INPUT_STATE_MOVE,
+				LAB_EDGE_NONE);
 		}
 		break;
 	case ACTION_TYPE_RAISE:
@@ -1159,7 +1160,7 @@ run_action(struct view *view, struct server *server, struct action *action,
 		break;
 	case ACTION_TYPE_RESIZE:
 		if (view) {
-			uint32_t resize_edges = cursor_get_resize_edges(
+			enum lab_edge resize_edges = cursor_get_resize_edges(
 				server->seat.cursor, ctx);
 			interactive_begin(view, LAB_INPUT_STATE_RESIZE,
 				resize_edges);

src/common/direction.c

@@ -1,44 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-#include "common/direction.h"
-#include <assert.h>
-#include <wlr/types/wlr_output_layout.h>
-#include "view.h"
-
-bool
-direction_from_edge(enum lab_edge edge, enum wlr_direction *direction)
-{
-	switch (edge) {
-	case LAB_EDGE_LEFT:
-		*direction = WLR_DIRECTION_LEFT;
-		return true;
-	case LAB_EDGE_RIGHT:
-		*direction = WLR_DIRECTION_RIGHT;
-		return true;
-	case LAB_EDGE_UP:
-		*direction = WLR_DIRECTION_UP;
-		return true;
-	case LAB_EDGE_DOWN:
-		*direction = WLR_DIRECTION_DOWN;
-		return true;
-	default:
-		return false;
-	}
-}
-
-enum wlr_direction
-direction_get_opposite(enum wlr_direction direction)
-{
-	switch (direction) {
-	case WLR_DIRECTION_RIGHT:
-		return WLR_DIRECTION_LEFT;
-	case WLR_DIRECTION_LEFT:
-		return WLR_DIRECTION_RIGHT;
-	case WLR_DIRECTION_DOWN:
-		return WLR_DIRECTION_UP;
-	case WLR_DIRECTION_UP:
-		return WLR_DIRECTION_DOWN;
-	default:
-		assert(0); /* Unreachable */
-		return WLR_DIRECTION_UP;
-	}
-}

src/common/edge.c

@@ -1,21 +1,36 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include "common/edge.h"
+#include <assert.h>
 #include <strings.h>
+#include <wlr/util/edges.h>
+#include <wlr/types/wlr_output_layout.h>
+
+static_assert((int)LAB_EDGE_TOP == (int)WLR_EDGE_TOP
+		&& (int)LAB_EDGE_BOTTOM == (int)WLR_EDGE_BOTTOM
+		&& (int)LAB_EDGE_LEFT == (int)WLR_EDGE_LEFT
+		&& (int)LAB_EDGE_RIGHT == (int)WLR_EDGE_RIGHT,
+	"enum lab_edge does not match enum wlr_edges");
+
+static_assert((int)LAB_EDGE_TOP == (int)WLR_DIRECTION_UP
+		&& (int)LAB_EDGE_BOTTOM == (int)WLR_DIRECTION_DOWN
+		&& (int)LAB_EDGE_LEFT == (int)WLR_DIRECTION_LEFT
+		&& (int)LAB_EDGE_RIGHT == (int)WLR_DIRECTION_RIGHT,
+	"enum lab_edge does not match enum wlr_direction");
 
 enum lab_edge
 lab_edge_parse(const char *direction, bool tiled, bool any)
 {
 	if (!direction) {
-		return LAB_EDGE_INVALID;
+		return LAB_EDGE_NONE;
 	}
 	if (!strcasecmp(direction, "left")) {
 		return LAB_EDGE_LEFT;
 	} else if (!strcasecmp(direction, "up")) {
-		return LAB_EDGE_UP;
+		return LAB_EDGE_TOP;
 	} else if (!strcasecmp(direction, "right")) {
 		return LAB_EDGE_RIGHT;
 	} else if (!strcasecmp(direction, "down")) {
-		return LAB_EDGE_DOWN;
+		return LAB_EDGE_BOTTOM;
 	}
 
 	if (any) {
@@ -28,17 +43,31 @@ lab_edge_parse(const char *direction, bool tiled, bool any)
 		if (!strcasecmp(direction, "center")) {
 			return LAB_EDGE_CENTER;
 		} else if (!strcasecmp(direction, "up-left")) {
-			return LAB_EDGE_UPLEFT;
+			return LAB_EDGES_TOP_LEFT;
 		} else if (!strcasecmp(direction, "up-right")) {
-			return LAB_EDGE_UPRIGHT;
+			return LAB_EDGES_TOP_RIGHT;
 		} else if (!strcasecmp(direction, "down-left")) {
-			return LAB_EDGE_DOWNLEFT;
+			return LAB_EDGES_BOTTOM_LEFT;
 		} else if (!strcasecmp(direction, "down-right")) {
-			return LAB_EDGE_DOWNRIGHT;
+			return LAB_EDGES_BOTTOM_RIGHT;
 		}
 	}
 
-	return LAB_EDGE_INVALID;
+	return LAB_EDGE_NONE;
+}
+
+bool
+lab_edge_is_cardinal(enum lab_edge edge)
+{
+	switch (edge) {
+	case LAB_EDGE_TOP:
+	case LAB_EDGE_BOTTOM:
+	case LAB_EDGE_LEFT:
+	case LAB_EDGE_RIGHT:
+		return true;
+	default:
+		return false;
+	}
 }
 
 enum lab_edge
@@ -49,11 +78,11 @@ lab_edge_invert(enum lab_edge edge)
 		return LAB_EDGE_RIGHT;
 	case LAB_EDGE_RIGHT:
 		return LAB_EDGE_LEFT;
-	case LAB_EDGE_UP:
+	case LAB_EDGE_TOP:
-		return LAB_EDGE_DOWN;
+		return LAB_EDGE_BOTTOM;
-	case LAB_EDGE_DOWN:
+	case LAB_EDGE_BOTTOM:
-		return LAB_EDGE_UP;
+		return LAB_EDGE_TOP;
 	default:
-		return LAB_EDGE_INVALID;
+		return LAB_EDGE_NONE;
 	}
 }

src/common/meson.build

@@ -1,5 +1,4 @@
 labwc_sources += files(
-  'direction.c',
   'box.c',
   'buf.c',
   'dir.c',

src/edges.c

@@ -40,32 +40,32 @@ edges_initialize(struct border *edges)
 }
 
 static inline struct edge
-build_edge(struct border region, enum wlr_edges direction, int pad)
+build_edge(struct border region, enum lab_edge direction, int pad)
 {
 	struct edge edge = { 0 };
 
 	switch (direction) {
-	case WLR_EDGE_LEFT:
+	case LAB_EDGE_LEFT:
 		edge.offset = clipped_sub(region.left, pad);
 		edge.min = region.top;
 		edge.max = region.bottom;
 		break;
-	case WLR_EDGE_RIGHT:
+	case LAB_EDGE_RIGHT:
 		edge.offset = clipped_add(region.right, pad);
 		edge.min = region.top;
 		edge.max = region.bottom;
 		break;
-	case WLR_EDGE_TOP:
+	case LAB_EDGE_TOP:
 		edge.offset = clipped_sub(region.top, pad);
 		edge.min = region.left;
 		edge.max = region.right;
 		break;
-	case WLR_EDGE_BOTTOM:
+	case LAB_EDGE_BOTTOM:
 		edge.offset = clipped_add(region.bottom, pad);
 		edge.min = region.left;
 		edge.max = region.right;
 		break;
-	case WLR_EDGE_NONE:
+	default:
 		/* Should never be reached */
 		wlr_log(WLR_ERROR, "invalid direction");
 		abort();
@@ -75,14 +75,14 @@ build_edge(struct border region, enum wlr_edges direction, int pad)
 }
 
 static inline bool
-is_lesser(enum wlr_edges direction)
+is_lesser(enum lab_edge direction)
 {
-	return direction == WLR_EDGE_LEFT || direction == WLR_EDGE_TOP;
+	return direction == LAB_EDGE_LEFT || direction == LAB_EDGE_TOP;
 }
 
 static inline struct edge
-build_visible_edge(struct border region, enum wlr_edges direction,
+build_visible_edge(struct border region, enum lab_edge direction,
-		int pad, uint32_t edges_visible)
+		int pad, enum lab_edge edges_visible)
 {
 	struct edge edge = build_edge(region, direction, pad);
 
@@ -97,7 +97,7 @@ static void
 validate_single_region_edge(int *valid_edge,
 		struct border view, struct border target,
 		struct border region, edge_validator_t validator,
-		enum wlr_edges direction, uint32_t edges_visible)
+		enum lab_edge direction, enum lab_edge edges_visible)
 {
 	/*
 	 * When a view snaps to another while moving to its target, it can do
@@ -115,26 +115,8 @@ validate_single_region_edge(int *valid_edge,
 	 * the region borders for aligned edges only.
 	 */
 
-	enum wlr_edges opposing = WLR_EDGE_NONE;
+	enum lab_edge opposing = lab_edge_invert(direction);
-
+	assert(opposing != LAB_EDGE_NONE);
-	switch (direction) {
-	case WLR_EDGE_TOP:
-		opposing = WLR_EDGE_BOTTOM;
-		break;
-	case WLR_EDGE_BOTTOM:
-		opposing = WLR_EDGE_TOP;
-		break;
-	case WLR_EDGE_LEFT:
-		opposing = WLR_EDGE_RIGHT;
-		break;
-	case WLR_EDGE_RIGHT:
-		opposing = WLR_EDGE_LEFT;
-		break;
-	case WLR_EDGE_NONE:
-		/* Should never be reached */
-		assert(false);
-		return;
-	}
 
 	validator(valid_edge,
 		build_edge(view, direction, 0),
@@ -147,31 +129,31 @@ validate_single_region_edge(int *valid_edge,
 static void
 validate_edges(struct border *valid_edges,
 		struct border view, struct border target,
-		struct border region, uint32_t edges_visible,
+		struct border region, enum lab_edge edges_visible,
 		edge_validator_t validator)
 {
 	/* Check for edges encountered during movement of left edge */
 	validate_single_region_edge(&valid_edges->left,
-		view, target, region, validator, WLR_EDGE_LEFT, edges_visible);
+		view, target, region, validator, LAB_EDGE_LEFT, edges_visible);
 
 	/* Check for edges encountered during movement of right edge */
 	validate_single_region_edge(&valid_edges->right,
-		view, target, region, validator, WLR_EDGE_RIGHT, edges_visible);
+		view, target, region, validator, LAB_EDGE_RIGHT, edges_visible);
 
 	/* Check for edges encountered during movement of top edge */
 	validate_single_region_edge(&valid_edges->top,
-		view, target, region, validator, WLR_EDGE_TOP, edges_visible);
+		view, target, region, validator, LAB_EDGE_TOP, edges_visible);
 
 	/* Check for edges encountered during movement of bottom edge */
 	validate_single_region_edge(&valid_edges->bottom,
-		view, target, region, validator, WLR_EDGE_BOTTOM, edges_visible);
+		view, target, region, validator, LAB_EDGE_BOTTOM, edges_visible);
 }
 
 static void
 validate_single_output_edge(int *valid_edge,
 		struct border view, struct border target,
 		struct border region, edge_validator_t validator,
-		enum wlr_edges direction)
+		enum lab_edge direction)
 {
 	static struct border unbounded = {
 		.top = INT_MIN,
@@ -226,24 +208,24 @@ validate_output_edges(struct border *valid_edges,
 	/* Left edge encounters a half-infinite region to the left of the output */
 
 	validate_single_output_edge(&valid_edges->left,
-			view, target, output, validator, WLR_EDGE_LEFT);
+		view, target, output, validator, LAB_EDGE_LEFT);
 
 	/* Right edge encounters a half-infinite region to the right of the output */
 
 	validate_single_output_edge(&valid_edges->right,
-			view, target, output, validator, WLR_EDGE_RIGHT);
+		view, target, output, validator, LAB_EDGE_RIGHT);
 
 	/* Top edge encounters a half-infinite region above the output */
 
 	validate_single_output_edge(&valid_edges->top,
-			view, target, output, validator, WLR_EDGE_TOP);
+		view, target, output, validator, LAB_EDGE_TOP);
 
 	/* Bottom edge encounters a half-infinite region below the output */
 	validate_single_output_edge(&valid_edges->bottom,
-			view, target, output, validator, WLR_EDGE_BOTTOM);
+		view, target, output, validator, LAB_EDGE_BOTTOM);
 }
 
-static uint32_t
+static enum lab_edge
 compute_edges_visible(const struct wlr_box *view_size,
 		const pixman_box32_t *view_rect,
 		const pixman_region32_t *available)
@@ -258,19 +240,19 @@ compute_edges_visible(const struct wlr_box *view_size,
 	const pixman_box32_t *rects =
 		pixman_region32_rectangles(&intersection, &nrects);
 
-	uint32_t edges_visible = 0;
+	enum lab_edge edges_visible = LAB_EDGE_NONE;
 	for (int i = 0; i < nrects; i++) {
 		if (rects[i].x1 == view_rect->x1) {
-			edges_visible |= WLR_EDGE_LEFT;
+			edges_visible |= LAB_EDGE_LEFT;
 		}
 		if (rects[i].y1 == view_rect->y1) {
-			edges_visible |= WLR_EDGE_TOP;
+			edges_visible |= LAB_EDGE_TOP;
 		}
 		if (rects[i].x2 == view_rect->x2) {
-			edges_visible |= WLR_EDGE_RIGHT;
+			edges_visible |= LAB_EDGE_RIGHT;
 		}
 		if (rects[i].y2 == view_rect->y2) {
-			edges_visible |= WLR_EDGE_BOTTOM;
+			edges_visible |= LAB_EDGE_BOTTOM;
 		}
 	}
 	pixman_region32_fini(&intersection);
@@ -294,11 +276,10 @@ subtract_view_from_space(struct view *view, pixman_region32_t *available)
 
 	switch (overlap) {
 	case PIXMAN_REGION_IN:
-		view->edges_visible = WLR_EDGE_TOP | WLR_EDGE_RIGHT
+		view->edges_visible = LAB_EDGES_ALL;
-			| WLR_EDGE_BOTTOM | WLR_EDGE_LEFT;
 		break;
 	case PIXMAN_REGION_OUT:
-		view->edges_visible = 0;
+		view->edges_visible = LAB_EDGE_NONE;
 		return;
 	case PIXMAN_REGION_PART:
 		view->edges_visible = compute_edges_visible(
@@ -411,11 +392,10 @@ edges_find_neighbors(struct border *nearest_edges, struct view *view,
 			continue;
 		}
 
-		uint32_t edges_visible = ignore_hidden ? v->edges_visible :
+		enum lab_edge edges_visible =
-			WLR_EDGE_TOP | WLR_EDGE_LEFT
+			ignore_hidden ? v->edges_visible : LAB_EDGES_ALL;
-				| WLR_EDGE_BOTTOM | WLR_EDGE_RIGHT;
 
-		if (edges_visible == 0) {
+		if (edges_visible == LAB_EDGE_NONE) {
 			continue;
 		}
 
@@ -543,7 +523,8 @@ edges_adjust_move_coords(struct view *view, struct border edges,
 
 void
 edges_adjust_resize_geom(struct view *view, struct border edges,
-		uint32_t resize_edges, struct wlr_box *geom, bool use_pending)
+		enum lab_edge resize_edges, struct wlr_box *geom,
+		bool use_pending)
 {
 	assert(view);
 
@@ -556,24 +537,24 @@ edges_adjust_resize_geom(struct view *view, struct border edges,
 	 * any valid nearest edge in the corresponding direction.
 	 */
 
-	if (resize_edges & WLR_EDGE_LEFT) {
+	if (resize_edges & LAB_EDGE_LEFT) {
 		if (BOUNDED_INT(edges.left)) {
 			geom->x = edges.left + border.left + rc.gap;
 			geom->width = view_geom->width + view_geom->x - geom->x;
 		}
-	} else if (resize_edges & WLR_EDGE_RIGHT) {
+	} else if (resize_edges & LAB_EDGE_RIGHT) {
 		if (BOUNDED_INT(edges.right)) {
 			geom->width = edges.right
 				- view_geom->x - border.right - rc.gap;
 		}
 	}
 
-	if (resize_edges & WLR_EDGE_TOP) {
+	if (resize_edges & LAB_EDGE_TOP) {
 		if (BOUNDED_INT(edges.top)) {
 			geom->y = edges.top + border.top + rc.gap;
 			geom->height = view_geom->height + view_geom->y - geom->y;
 		}
-	} else if (resize_edges & WLR_EDGE_BOTTOM) {
+	} else if (resize_edges & LAB_EDGE_BOTTOM) {
 		if (BOUNDED_INT(edges.bottom)) {
 			geom->height = edges.bottom
 				- view_geom->y - border.bottom - rc.gap;

src/input/cursor.c

@@ -88,40 +88,34 @@ static_assert(
 	"X11 cursor names are out of sync");
 
 enum lab_cursors
-cursor_get_from_edge(uint32_t resize_edges)
+cursor_get_from_edge(enum lab_edge resize_edges)
 {
 	switch (resize_edges) {
-	case WLR_EDGE_NONE:
+	case LAB_EDGES_TOP_LEFT:
-		return LAB_CURSOR_DEFAULT;
-	case WLR_EDGE_TOP | WLR_EDGE_LEFT:
 		return LAB_CURSOR_RESIZE_NW;
-	case WLR_EDGE_TOP:
+	case LAB_EDGE_TOP:
 		return LAB_CURSOR_RESIZE_N;
-	case WLR_EDGE_TOP | WLR_EDGE_RIGHT:
+	case LAB_EDGES_TOP_RIGHT:
 		return LAB_CURSOR_RESIZE_NE;
-	case WLR_EDGE_RIGHT:
+	case LAB_EDGE_RIGHT:
 		return LAB_CURSOR_RESIZE_E;
-	case WLR_EDGE_BOTTOM | WLR_EDGE_RIGHT:
+	case LAB_EDGES_BOTTOM_RIGHT:
 		return LAB_CURSOR_RESIZE_SE;
-	case WLR_EDGE_BOTTOM:
+	case LAB_EDGE_BOTTOM:
 		return LAB_CURSOR_RESIZE_S;
-	case WLR_EDGE_BOTTOM | WLR_EDGE_LEFT:
+	case LAB_EDGES_BOTTOM_LEFT:
 		return LAB_CURSOR_RESIZE_SW;
-	case WLR_EDGE_LEFT:
+	case LAB_EDGE_LEFT:
 		return LAB_CURSOR_RESIZE_W;
 	default:
-		wlr_log(WLR_ERROR,
+		return LAB_CURSOR_DEFAULT;
-			"Failed to resolve wlroots edge %u to cursor name", resize_edges);
-		assert(false);
 	}
-
-	return LAB_CURSOR_DEFAULT;
 }
 
 static enum lab_cursors
 cursor_get_from_ssd(enum ssd_part_type view_area)
 {
-	uint32_t resize_edges = ssd_resize_edges(view_area);
+	enum lab_edge resize_edges = ssd_resize_edges(view_area);
 	return cursor_get_from_edge(resize_edges);
 }
 
@@ -342,32 +336,32 @@ process_cursor_resize(struct server *server, uint32_t time)
 	struct view *view = server->grabbed_view;
 	struct wlr_box new_view_geo = view->current;
 
-	if (server->resize_edges & WLR_EDGE_TOP) {
+	if (server->resize_edges & LAB_EDGE_TOP) {
 		/* Shift y to anchor bottom edge when resizing top */
 		new_view_geo.y = server->grab_box.y + dy;
 		new_view_geo.height = server->grab_box.height - dy;
-	} else if (server->resize_edges & WLR_EDGE_BOTTOM) {
+	} else if (server->resize_edges & LAB_EDGE_BOTTOM) {
 		new_view_geo.height = server->grab_box.height + dy;
 	}
 
-	if (server->resize_edges & WLR_EDGE_LEFT) {
+	if (server->resize_edges & LAB_EDGE_LEFT) {
 		/* Shift x to anchor right edge when resizing left */
 		new_view_geo.x = server->grab_box.x + dx;
 		new_view_geo.width = server->grab_box.width - dx;
-	} else if (server->resize_edges & WLR_EDGE_RIGHT) {
+	} else if (server->resize_edges & LAB_EDGE_RIGHT) {
 		new_view_geo.width = server->grab_box.width + dx;
 	}
 
 	resistance_resize_apply(view, &new_view_geo);
 	view_adjust_size(view, &new_view_geo.width, &new_view_geo.height);
 
-	if (server->resize_edges & WLR_EDGE_TOP) {
+	if (server->resize_edges & LAB_EDGE_TOP) {
 		/* After size adjustments, make sure to anchor bottom edge */
 		new_view_geo.y = server->grab_box.y +
 			server->grab_box.height - new_view_geo.height;
 	}
 
-	if (server->resize_edges & WLR_EDGE_LEFT) {
+	if (server->resize_edges & LAB_EDGE_LEFT) {
 		/* After size adjustments, make sure to anchor bottom right */
 		new_view_geo.x = server->grab_box.x +
 			server->grab_box.width - new_view_geo.width;
@@ -582,18 +576,18 @@ cursor_update_common(struct server *server, struct cursor_context *ctx,
 	return false;
 }
 
-uint32_t
+enum lab_edge
 cursor_get_resize_edges(struct wlr_cursor *cursor, struct cursor_context *ctx)
 {
-	uint32_t resize_edges = ssd_resize_edges(ctx->type);
+	enum lab_edge resize_edges = ssd_resize_edges(ctx->type);
 	if (ctx->view && !resize_edges) {
 		struct wlr_box box = ctx->view->current;
 		resize_edges |=
 			(int)cursor->x < box.x + box.width / 2 ?
-				WLR_EDGE_LEFT : WLR_EDGE_RIGHT;
+				LAB_EDGE_LEFT : LAB_EDGE_RIGHT;
 		resize_edges |=
 			(int)cursor->y < box.y + box.height / 2 ?
-				WLR_EDGE_TOP : WLR_EDGE_BOTTOM;
+				LAB_EDGE_TOP : LAB_EDGE_BOTTOM;
 	}
 	return resize_edges;
 }

src/interactive.c

@@ -55,7 +55,7 @@ interactive_anchor_to_cursor(struct server *server, struct wlr_box *geo)
 }
 
 void
-interactive_begin(struct view *view, enum input_mode mode, uint32_t edges)
+interactive_begin(struct view *view, enum input_mode mode, enum lab_edge edges)
 {
 	/*
 	 * This function sets up an interactive move or resize operation, where
@@ -170,8 +170,8 @@ edge_from_cursor(struct seat *seat, struct output **dest_output,
 		enum lab_edge *edge1, enum lab_edge *edge2)
 {
 	*dest_output = NULL;
-	*edge1 = LAB_EDGE_INVALID;
+	*edge1 = LAB_EDGE_NONE;
-	*edge2 = LAB_EDGE_INVALID;
+	*edge2 = LAB_EDGE_NONE;
 
 	if (!view_is_floating(seat->server->grabbed_view)) {
 		return false;
@@ -202,9 +202,9 @@ edge_from_cursor(struct seat *seat, struct output **dest_output,
 	int right = area->x + area->width - cursor_x;
 
 	if (top < rc.snap_edge_range) {
-		*edge1 = LAB_EDGE_UP;
+		*edge1 = LAB_EDGE_TOP;
 	} else if (bottom < rc.snap_edge_range) {
-		*edge1 = LAB_EDGE_DOWN;
+		*edge1 = LAB_EDGE_BOTTOM;
 	} else if (left < rc.snap_edge_range) {
 		*edge1 = LAB_EDGE_LEFT;
 	} else if (right < rc.snap_edge_range) {
@@ -213,7 +213,7 @@ edge_from_cursor(struct seat *seat, struct output **dest_output,
 		return false;
 	}
 
-	if (*edge1 == LAB_EDGE_UP || *edge1 == LAB_EDGE_DOWN) {
+	if (*edge1 == LAB_EDGE_TOP || *edge1 == LAB_EDGE_BOTTOM) {
 		if (left < rc.snap_edge_corner_range) {
 			*edge2 = LAB_EDGE_LEFT;
 		} else if (right < rc.snap_edge_corner_range) {
@@ -221,9 +221,9 @@ edge_from_cursor(struct seat *seat, struct output **dest_output,
 		}
 	} else if (*edge1  == LAB_EDGE_LEFT || *edge1 == LAB_EDGE_RIGHT) {
 		if (top < rc.snap_edge_corner_range) {
-			*edge2 = LAB_EDGE_UP;
+			*edge2 = LAB_EDGE_TOP;
 		} else if (bottom < rc.snap_edge_corner_range) {
-			*edge2 = LAB_EDGE_DOWN;
+			*edge2 = LAB_EDGE_BOTTOM;
 		}
 	}
 
@@ -246,7 +246,7 @@ snap_to_edge(struct view *view)
 	 * Don't store natural geometry here (it was
 	 * stored already in interactive_begin())
 	 */
-	if (edge == LAB_EDGE_UP && rc.snap_top_maximize) {
+	if (edge == LAB_EDGE_TOP && rc.snap_top_maximize) {
 		/* <topMaximize> */
 		view_maximize(view, VIEW_AXIS_BOTH,
 			/*store_natural_geometry*/ false);

src/output.c

@@ -23,7 +23,6 @@
 #include <wlr/types/wlr_scene.h>
 #include <wlr/util/region.h>
 #include <wlr/util/log.h>
-#include "common/direction.h"
 #include "common/macros.h"
 #include "common/mem.h"
 #include "common/scene-helpers.h"
@@ -986,8 +985,8 @@ output_get_adjacent(struct output *output, enum lab_edge edge, bool wrap)
 		return NULL;
 	}
 
-	enum wlr_direction direction;
+	/* Allow only up/down/left/right */
-	if (!direction_from_edge(edge, &direction)) {
+	if (!lab_edge_is_cardinal(edge)) {
 		return NULL;
 	}
 
@@ -999,16 +998,18 @@ output_get_adjacent(struct output *output, enum lab_edge edge, bool wrap)
 	struct wlr_output *new_output = NULL;
 	struct wlr_output *current_output = output->wlr_output;
 	struct wlr_output_layout *layout = output->server->output_layout;
-	new_output = wlr_output_layout_adjacent_output(layout, direction,
+	/* Cast from enum lab_edge to enum wlr_direction is safe */
-		current_output, lx, ly);
+	new_output = wlr_output_layout_adjacent_output(layout,
+		(enum wlr_direction)edge, current_output, lx, ly);
 
 	/*
 	 * Optionally wrap around from top-to-bottom or left-to-right, and vice
 	 * versa.
 	 */
 	if (wrap && !new_output) {
+		enum lab_edge opposite = lab_edge_invert(edge);
 		new_output = wlr_output_layout_farthest_output(layout,
-			direction_get_opposite(direction), current_output, lx, ly);
+			(enum wlr_direction)opposite, current_output, lx, ly);
 	}
 
 	/*

src/overlay.c

@@ -2,7 +2,6 @@
 #include "overlay.h"
 #include <assert.h>
 #include <wlr/types/wlr_scene.h>
-#include "common/direction.h"
 #include "common/lab-scene-rect.h"
 #include "config/rcxml.h"
 #include "labwc.h"
@@ -97,7 +96,7 @@ inactivate_overlay(struct overlay *overlay)
 			&overlay->edge_rect.tree->node, false);
 	}
 	overlay->active.region = NULL;
-	overlay->active.edge = LAB_EDGE_INVALID;
+	overlay->active.edge = LAB_EDGE_NONE;
 	overlay->active.output = NULL;
 	if (overlay->timer) {
 		wl_event_source_timer_update(overlay->timer, 0);
@@ -120,7 +119,7 @@ show_region_overlay(struct seat *seat, struct region *region)
 static struct wlr_box
 get_edge_snap_box(enum lab_edge edge, struct output *output)
 {
-	if (edge == LAB_EDGE_UP && rc.snap_top_maximize) {
+	if (edge == LAB_EDGE_TOP && rc.snap_top_maximize) {
 		return output_usable_area_in_layout_coords(output);
 	} else {
 		return view_get_edge_snap_box(NULL, output, edge);
@@ -131,7 +130,7 @@ static int
 handle_edge_overlay_timeout(void *data)
 {
 	struct seat *seat = data;
-	assert(seat->overlay.active.edge != LAB_EDGE_INVALID
+	assert(seat->overlay.active.edge != LAB_EDGE_NONE
 		&& seat->overlay.active.output);
 	struct wlr_box box = get_edge_snap_box(seat->overlay.active.edge,
 		seat->overlay.active.output);
@@ -143,12 +142,13 @@ static bool
 edge_has_adjacent_output_from_cursor(struct seat *seat, struct output *output,
 		enum lab_edge edge)
 {
-	enum wlr_direction dir;
+	/* Allow only up/down/left/right */
-	if (!direction_from_edge(edge, &dir)) {
+	if (!lab_edge_is_cardinal(edge)) {
 		return false;
 	}
+	/* Cast from enum lab_edge to enum wlr_direction is safe */
 	return wlr_output_layout_adjacent_output(
-		seat->server->output_layout, dir,
+		seat->server->output_layout, (enum wlr_direction)edge,
 		output->wlr_output, seat->cursor->x, seat->cursor->y);
 }
 
@@ -159,7 +159,7 @@ show_edge_overlay(struct seat *seat, enum lab_edge edge1, enum lab_edge edge2,
 	if (!rc.snap_overlay_enabled) {
 		return;
 	}
-	uint32_t edge = edge1 | edge2;
+	enum lab_edge edge = edge1 | edge2;
 	if (seat->overlay.active.edge == edge
 			&& seat->overlay.active.output == output) {
 		return;

src/resistance.c

@@ -167,7 +167,7 @@ resistance_resize_apply(struct view *view, struct wlr_box *new_geom)
 	edges_initialize(&next_edges);
 
 	/* Use a constrained, effective geometry for snapping if appropriate */
-	enum wlr_edges resize_edges = view->server->resize_edges;
+	enum lab_edge resize_edges = view->server->resize_edges;
 	struct wlr_box origin =
 		snap_constraints_effective(view, resize_edges, /* use_pending */ false);
 

src/snap-constraints.c

@@ -39,7 +39,7 @@ static struct {
 	bool pending;
 	int vertical_offset;
 	int horizontal_offset;
-	enum wlr_edges resize_edges;
+	enum lab_edge resize_edges;
 	struct wlr_box geom;
 } last_snap_hit;
 
@@ -50,12 +50,12 @@ snap_constraints_reset(void)
 	last_snap_hit.pending = false;
 	last_snap_hit.horizontal_offset = INT_MIN;
 	last_snap_hit.vertical_offset = INT_MIN;
-	last_snap_hit.resize_edges = WLR_EDGE_NONE;
+	last_snap_hit.resize_edges = LAB_EDGE_NONE;
 	memset(&last_snap_hit.geom, 0, sizeof(last_snap_hit.geom));
 }
 
 static bool
-snap_constraints_are_valid(struct view *view, enum wlr_edges resize_edges)
+snap_constraints_are_valid(struct view *view, enum lab_edge resize_edges)
 {
 	assert(view);
 
@@ -70,20 +70,20 @@ snap_constraints_are_valid(struct view *view, enum wlr_edges resize_edges)
 	}
 
 	/* Cache is not valid if edge offsets are invalid */
-	if (resize_edges & (WLR_EDGE_LEFT | WLR_EDGE_RIGHT)) {
+	if (resize_edges & LAB_EDGES_LEFT_RIGHT) {
 		if (!BOUNDED_INT(last_snap_hit.horizontal_offset)) {
 			return false;
 		}
 
-		if ((resize_edges & WLR_EDGE_LEFT) && (resize_edges & WLR_EDGE_RIGHT)) {
+		if ((resize_edges & LAB_EDGE_LEFT) && (resize_edges & LAB_EDGE_RIGHT)) {
 			return false;
 		}
-	} else if (resize_edges & (WLR_EDGE_TOP | WLR_EDGE_BOTTOM)) {
+	} else if (resize_edges & LAB_EDGES_TOP_BOTTOM) {
 		if (!BOUNDED_INT(last_snap_hit.vertical_offset)) {
 			return false;
 		}
 
-		if ((resize_edges & WLR_EDGE_TOP) && (resize_edges & WLR_EDGE_BOTTOM)) {
+		if ((resize_edges & LAB_EDGE_TOP) && (resize_edges & LAB_EDGE_BOTTOM)) {
 			return false;
 		}
 	} else {
@@ -95,24 +95,24 @@ snap_constraints_are_valid(struct view *view, enum wlr_edges resize_edges)
 }
 
 void
-snap_constraints_set(struct view *view,
+snap_constraints_set(struct view *view, enum lab_edge resize_edges,
-		enum wlr_edges resize_edges, struct wlr_box geom)
+		struct wlr_box geom)
 {
 	assert(view);
 
 	/* Set horizontal offset when resizing horizontal edges */
 	last_snap_hit.horizontal_offset = INT_MIN;
-	if (resize_edges & WLR_EDGE_LEFT) {
+	if (resize_edges & LAB_EDGE_LEFT) {
 		last_snap_hit.horizontal_offset = geom.x;
-	} else if (resize_edges & WLR_EDGE_RIGHT) {
+	} else if (resize_edges & LAB_EDGE_RIGHT) {
 		last_snap_hit.horizontal_offset = geom.x + geom.width;
 	}
 
 	/* Set vertical offset when resizing vertical edges */
 	last_snap_hit.vertical_offset = INT_MIN;
-	if (resize_edges & WLR_EDGE_TOP) {
+	if (resize_edges & LAB_EDGE_TOP) {
 		last_snap_hit.vertical_offset = geom.y;
-	} else if (resize_edges & WLR_EDGE_BOTTOM) {
+	} else if (resize_edges & LAB_EDGE_BOTTOM) {
 		last_snap_hit.vertical_offset = geom.y + geom.height;
 	}
 
@@ -166,8 +166,8 @@ snap_constraints_update(struct view *view)
 }
 
 struct wlr_box
-snap_constraints_effective(struct view *view,
+snap_constraints_effective(struct view *view, enum lab_edge resize_edges,
-		enum wlr_edges resize_edges, bool use_pending)
+		bool use_pending)
 {
 	assert(view);
 
@@ -181,15 +181,15 @@ snap_constraints_effective(struct view *view,
 	/* Override changing edge with constrained value */
 	struct wlr_box geom = real_geom;
 
-	if (resize_edges & WLR_EDGE_LEFT) {
+	if (resize_edges & LAB_EDGE_LEFT) {
 		geom.x = last_snap_hit.horizontal_offset;
-	} else if (resize_edges & WLR_EDGE_RIGHT) {
+	} else if (resize_edges & LAB_EDGE_RIGHT) {
 		geom.width = last_snap_hit.horizontal_offset - geom.x;
 	}
 
-	if (resize_edges & WLR_EDGE_TOP) {
+	if (resize_edges & LAB_EDGE_TOP) {
 		geom.y = last_snap_hit.vertical_offset;
-	} else if (resize_edges & WLR_EDGE_BOTTOM) {
+	} else if (resize_edges & LAB_EDGE_BOTTOM) {
 		geom.height = last_snap_hit.vertical_offset - geom.y;
 	}
 

src/snap.c

@@ -93,13 +93,13 @@ snap_move_to_edge(struct view *view, enum lab_edge direction,
 			return;
 		}
 		break;
-	case LAB_EDGE_UP:
+	case LAB_EDGE_TOP:
 		target.y = usable.y + ssd.top + rc.gap;
 		if (target.y >= view->pending.y) {
 			return;
 		}
 		break;
-	case LAB_EDGE_DOWN:
+	case LAB_EDGE_BOTTOM:
 		target.y = usable.y + usable.height - rc.gap - ssd.bottom
 			- view_effective_height(view, /* use_pending */ true);
 		if (target.y <= view->pending.y) {
@@ -149,29 +149,29 @@ snap_grow_to_next_edge(struct view *view,
 
 	struct border ssd = ssd_thickness(view);
 	struct wlr_box usable = output_usable_area_in_layout_coords(output);
-	uint32_t resize_edges;
+	enum lab_edge resize_edges;
 
 	/* First try to grow the view to the relevant edge of its output. */
 	switch (direction) {
 	case LAB_EDGE_LEFT:
 		geo->x = usable.x + ssd.left + rc.gap;
 		geo->width = view->pending.x + view->pending.width - geo->x;
-		resize_edges = WLR_EDGE_LEFT;
+		resize_edges = LAB_EDGE_LEFT;
 		break;
 	case LAB_EDGE_RIGHT:
 		geo->width = usable.x + usable.width
 			- rc.gap - ssd.right - view->pending.x;
-		resize_edges = WLR_EDGE_RIGHT;
+		resize_edges = LAB_EDGE_RIGHT;
 		break;
-	case LAB_EDGE_UP:
+	case LAB_EDGE_TOP:
 		geo->y = usable.y + ssd.top + rc.gap;
 		geo->height = view->pending.y + view->pending.height - geo->y;
-		resize_edges = WLR_EDGE_TOP;
+		resize_edges = LAB_EDGE_TOP;
 		break;
-	case LAB_EDGE_DOWN:
+	case LAB_EDGE_BOTTOM:
 		geo->height = usable.y + usable.height
 			- rc.gap - ssd.bottom - view->pending.y;
-		resize_edges = WLR_EDGE_BOTTOM;
+		resize_edges = LAB_EDGE_BOTTOM;
 		break;
 	default:
 		return;
@@ -220,7 +220,7 @@ snap_shrink_to_next_edge(struct view *view,
 	assert(!view->shaded);
 
 	*geo = view->pending;
-	uint32_t resize_edges;
+	enum lab_edge resize_edges;
 	int min_width = view_get_min_width();
 
 	/*
@@ -232,20 +232,20 @@ snap_shrink_to_next_edge(struct view *view,
 	case LAB_EDGE_RIGHT:
 		geo->width = MAX(geo->width / 2, min_width);
 		geo->x = view->pending.x + view->pending.width - geo->width;
-		resize_edges = WLR_EDGE_LEFT;
+		resize_edges = LAB_EDGE_LEFT;
 		break;
 	case LAB_EDGE_LEFT:
 		geo->width = MAX(geo->width / 2, min_width);
-		resize_edges = WLR_EDGE_RIGHT;
+		resize_edges = LAB_EDGE_RIGHT;
 		break;
-	case LAB_EDGE_DOWN:
+	case LAB_EDGE_BOTTOM:
 		geo->height = MAX(geo->height / 2, LAB_MIN_VIEW_HEIGHT);
 		geo->y = view->pending.y + view->pending.height - geo->height;
-		resize_edges = WLR_EDGE_TOP;
+		resize_edges = LAB_EDGE_TOP;
 		break;
-	case LAB_EDGE_UP:
+	case LAB_EDGE_TOP:
 		geo->height = MAX(geo->height / 2, LAB_MIN_VIEW_HEIGHT);
-		resize_edges = WLR_EDGE_BOTTOM;
+		resize_edges = LAB_EDGE_BOTTOM;
 		break;
 	default:
 		return;

src/ssd/ssd.c

@@ -205,28 +205,28 @@ ssd_get_part_type(const struct ssd *ssd, struct wlr_scene_node *node,
 	return resizing_type != LAB_SSD_NONE ? resizing_type : part_type;
 }
 
-uint32_t
+enum lab_edge
 ssd_resize_edges(enum ssd_part_type type)
 {
 	switch (type) {
 	case LAB_SSD_PART_TOP:
-		return WLR_EDGE_TOP;
+		return LAB_EDGE_TOP;
 	case LAB_SSD_PART_RIGHT:
-		return WLR_EDGE_RIGHT;
+		return LAB_EDGE_RIGHT;
 	case LAB_SSD_PART_BOTTOM:
-		return WLR_EDGE_BOTTOM;
+		return LAB_EDGE_BOTTOM;
 	case LAB_SSD_PART_LEFT:
-		return WLR_EDGE_LEFT;
+		return LAB_EDGE_LEFT;
 	case LAB_SSD_PART_CORNER_TOP_LEFT:
-		return WLR_EDGE_TOP | WLR_EDGE_LEFT;
+		return LAB_EDGES_TOP_LEFT;
 	case LAB_SSD_PART_CORNER_TOP_RIGHT:
-		return WLR_EDGE_RIGHT | WLR_EDGE_TOP;
+		return LAB_EDGES_TOP_RIGHT;
 	case LAB_SSD_PART_CORNER_BOTTOM_RIGHT:
-		return WLR_EDGE_BOTTOM | WLR_EDGE_RIGHT;
+		return LAB_EDGES_BOTTOM_RIGHT;
 	case LAB_SSD_PART_CORNER_BOTTOM_LEFT:
-		return WLR_EDGE_BOTTOM | WLR_EDGE_LEFT;
+		return LAB_EDGES_BOTTOM_LEFT;
 	default:
-		return WLR_EDGE_NONE;
+		return LAB_EDGE_NONE;
 	}
 }
 

src/theme.c

@@ -43,10 +43,9 @@ struct button {
 	uint8_t state_set;
 };
 
-enum corner {
+enum rounded_corner {
-	LAB_CORNER_UNKNOWN = 0,
+	ROUNDED_CORNER_TOP_LEFT,
-	LAB_CORNER_TOP_LEFT,
+	ROUNDED_CORNER_TOP_RIGHT
-	LAB_CORNER_TOP_RIGHT,
 };
 
 struct rounded_corner_ctx {
@@ -55,7 +54,7 @@ struct rounded_corner_ctx {
 	double line_width;
 	cairo_pattern_t *fill_pattern;
 	float *border_color;
-	enum corner corner;
+	enum rounded_corner corner;
 };
 
 #define zero_array(arr) memset(arr, 0, sizeof(arr))
@@ -1110,10 +1109,6 @@ theme_read(struct theme *theme, struct wl_list *paths)
 static struct lab_data_buffer *
 rounded_rect(struct rounded_corner_ctx *ctx)
 {
-	if (ctx->corner == LAB_CORNER_UNKNOWN) {
-		return NULL;
-	}
-
 	double w = ctx->box->width;
 	double h = ctx->box->height;
 	double r = ctx->radius;
@@ -1147,20 +1142,18 @@ rounded_rect(struct rounded_corner_ctx *ctx)
 	cairo_set_line_width(cairo, 0.0);
 	cairo_new_sub_path(cairo);
 	switch (ctx->corner) {
-	case LAB_CORNER_TOP_LEFT:
+	case ROUNDED_CORNER_TOP_LEFT:
 		cairo_arc(cairo, r, r, r, 180 * deg, 270 * deg);
 		cairo_line_to(cairo, w, 0);
 		cairo_line_to(cairo, w, h);
 		cairo_line_to(cairo, 0, h);
 		break;
-	case LAB_CORNER_TOP_RIGHT:
+	case ROUNDED_CORNER_TOP_RIGHT:
 		cairo_arc(cairo, w - r, r, r, -90 * deg, 0 * deg);
 		cairo_line_to(cairo, w, h);
 		cairo_line_to(cairo, 0, h);
 		cairo_line_to(cairo, 0, 0);
 		break;
-	default:
-		wlr_log(WLR_ERROR, "unknown corner type");
 	}
 	cairo_close_path(cairo);
 	cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
@@ -1203,20 +1196,18 @@ rounded_rect(struct rounded_corner_ctx *ctx)
 	cairo_set_line_width(cairo, ctx->line_width);
 	double half_line_width = ctx->line_width / 2.0;
 	switch (ctx->corner) {
-	case LAB_CORNER_TOP_LEFT:
+	case ROUNDED_CORNER_TOP_LEFT:
 		cairo_move_to(cairo, half_line_width, h);
 		cairo_line_to(cairo, half_line_width, r);
 		cairo_move_to(cairo, r, half_line_width);
 		cairo_line_to(cairo, w, half_line_width);
 		break;
-	case LAB_CORNER_TOP_RIGHT:
+	case ROUNDED_CORNER_TOP_RIGHT:
 		cairo_move_to(cairo, 0, half_line_width);
 		cairo_line_to(cairo, w - r, half_line_width);
 		cairo_move_to(cairo, w - half_line_width, r);
 		cairo_line_to(cairo, w - half_line_width, h);
 		break;
-	default:
-		wlr_log(WLR_ERROR, "unknown corner type");
 	}
 	cairo_stroke(cairo);
 
@@ -1264,16 +1255,14 @@ rounded_rect(struct rounded_corner_ctx *ctx)
 	cairo_set_line_width(cairo, line_width);
 	half_line_width = line_width / 2.0;
 	switch (ctx->corner) {
-	case LAB_CORNER_TOP_LEFT:
+	case ROUNDED_CORNER_TOP_LEFT:
 		cairo_move_to(cairo, half_line_width, r);
 		cairo_arc(cairo, r, r, r - half_line_width, 180 * deg, 270 * deg);
 		break;
-	case LAB_CORNER_TOP_RIGHT:
+	case ROUNDED_CORNER_TOP_RIGHT:
 		cairo_move_to(cairo, w - r, half_line_width);
 		cairo_arc(cairo, w - r, r, r - half_line_width, -90 * deg, 0 * deg);
 		break;
-	default:
-		break;
 	}
 	cairo_stroke(cairo);
 
@@ -1374,10 +1363,10 @@ create_corners(struct theme *theme)
 			.line_width = theme->border_width,
 			.fill_pattern = theme->window[active].titlebar_pattern,
 			.border_color = theme->window[active].border_color,
-			.corner = LAB_CORNER_TOP_LEFT,
+			.corner = ROUNDED_CORNER_TOP_LEFT,
 		};
 		theme->window[active].corner_top_left_normal = rounded_rect(&ctx);
-		ctx.corner = LAB_CORNER_TOP_RIGHT;
+		ctx.corner = ROUNDED_CORNER_TOP_RIGHT;
 		theme->window[active].corner_top_right_normal = rounded_rect(&ctx);
 	}
 }

src/view-impl-common.c

@@ -59,7 +59,7 @@ view_impl_unmap(struct view *view)
 }
 
 static bool
-resizing_edge(struct view *view, uint32_t edge)
+resizing_edge(struct view *view, enum lab_edge edge)
 {
 	struct server *server = view->server;
 	return server->input_mode == LAB_INPUT_STATE_RESIZE
@@ -86,7 +86,7 @@ view_impl_apply_geometry(struct view *view, int w, int h)
 	 * reliable on its own. The combination of the two methods
 	 * should catch 99% of resize cases that we care about.
 	 */
-	bool resizing_left_edge = resizing_edge(view, WLR_EDGE_LEFT);
+	bool resizing_left_edge = resizing_edge(view, LAB_EDGE_LEFT);
 	if (resizing_left_edge || (current->x != pending->x
 			&& current->x + current->width ==
 			pending->x + pending->width)) {
@@ -96,7 +96,7 @@ view_impl_apply_geometry(struct view *view, int w, int h)
 	}
 
 	/* Anchor bottom edge if resizing via top edge */
-	bool resizing_top_edge = resizing_edge(view, WLR_EDGE_TOP);
+	bool resizing_top_edge = resizing_edge(view, LAB_EDGE_TOP);
 	if (resizing_top_edge || (current->y != pending->y
 			&& current->y + current->height ==
 			pending->y + pending->height)) {

src/view.c

@@ -177,7 +177,7 @@ view_matches_query(struct view *view, struct view_query *query)
 		if (!view->tiled) {
 			return false;
 		}
-	} else if (query->tiled != LAB_EDGE_INVALID) {
+	} else if (query->tiled != LAB_EDGE_NONE) {
 		if (query->tiled != view->tiled) {
 			return false;
 		}
@@ -447,10 +447,10 @@ view_get_edge_snap_box(struct view *view, struct output *output,
 	if (edge & LAB_EDGE_LEFT) {
 		x2 = (usable.width - rc.gap) / 2;
 	}
-	if (edge & LAB_EDGE_DOWN) {
+	if (edge & LAB_EDGE_BOTTOM) {
 		y1 = (usable.height + rc.gap) / 2;
 	}
-	if (edge & LAB_EDGE_UP) {
+	if (edge & LAB_EDGE_TOP) {
 		y2 = (usable.height - rc.gap) / 2;
 	}
 
@@ -1453,7 +1453,7 @@ void
 view_set_untiled(struct view *view)
 {
 	assert(view);
-	view->tiled = LAB_EDGE_INVALID;
+	view->tiled = LAB_EDGE_NONE;
 	view->tiled_region = NULL;
 	zfree(view->tiled_region_evacuate);
 	view_notify_tiled(view);
@@ -2024,10 +2024,10 @@ view_move_to_edge(struct view *view, enum lab_edge direction, bool snap_to_windo
 	case LAB_EDGE_RIGHT:
 		destination_x = right - view->pending.width;
 		break;
-	case LAB_EDGE_UP:
+	case LAB_EDGE_TOP:
 		destination_y = top;
 		break;
-	case LAB_EDGE_DOWN:
+	case LAB_EDGE_BOTTOM:
 		destination_y = bottom
 			- view_effective_height(view, /* use_pending */ true);
 		break;

src/xdg.c

@@ -399,7 +399,7 @@ handle_request_move(struct wl_listener *listener, void *data)
 	 */
 	struct view *view = wl_container_of(listener, view, request_move);
 	if (view == view->server->seat.pressed.view) {
-		interactive_begin(view, LAB_INPUT_STATE_MOVE, 0);
+		interactive_begin(view, LAB_INPUT_STATE_MOVE, LAB_EDGE_NONE);
 	}
 }
 
@@ -653,7 +653,7 @@ xdg_toplevel_view_notify_tiled(struct view *view)
 		return;
 	}
 
-	enum wlr_edges edge = WLR_EDGE_NONE;
+	enum lab_edge edge = LAB_EDGE_NONE;
 
 	bool want_edge = rc.snap_tiling_events_mode & LAB_TILING_EVENTS_EDGE;
 	bool want_region = rc.snap_tiling_events_mode & LAB_TILING_EVENTS_REGION;
@@ -665,39 +665,32 @@ xdg_toplevel_view_notify_tiled(struct view *view)
 	if (want_edge) {
 		switch (view->tiled) {
 		case LAB_EDGE_LEFT:
-			edge = WLR_EDGE_LEFT | WLR_EDGE_TOP | WLR_EDGE_BOTTOM;
+			edge = LAB_EDGES_EXCEPT_RIGHT;
 			break;
 		case LAB_EDGE_RIGHT:
-			edge = WLR_EDGE_RIGHT | WLR_EDGE_TOP | WLR_EDGE_BOTTOM;
+			edge = LAB_EDGES_EXCEPT_LEFT;
 			break;
-		case LAB_EDGE_UP:
+		case LAB_EDGE_TOP:
-			edge = WLR_EDGE_TOP | WLR_EDGE_LEFT | WLR_EDGE_RIGHT;
+			edge = LAB_EDGES_EXCEPT_BOTTOM;
 			break;
-		case LAB_EDGE_DOWN:
+		case LAB_EDGE_BOTTOM:
-			edge = WLR_EDGE_BOTTOM | WLR_EDGE_LEFT | WLR_EDGE_RIGHT;
+			edge = LAB_EDGES_EXCEPT_TOP;
 			break;
-		case LAB_EDGE_UPLEFT:
+		case LAB_EDGES_TOP_LEFT:
-			edge = WLR_EDGE_TOP | WLR_EDGE_LEFT;
+		case LAB_EDGES_TOP_RIGHT:
-			break;
+		case LAB_EDGES_BOTTOM_LEFT:
-		case LAB_EDGE_UPRIGHT:
+		case LAB_EDGES_BOTTOM_RIGHT:
-			edge = WLR_EDGE_TOP | WLR_EDGE_RIGHT;
+			edge = view->tiled;
-			break;
-		case LAB_EDGE_DOWNLEFT:
-			edge = WLR_EDGE_BOTTOM | WLR_EDGE_LEFT;
-			break;
-		case LAB_EDGE_DOWNRIGHT:
-			edge = WLR_EDGE_BOTTOM | WLR_EDGE_RIGHT;
 			break;
 		/* TODO: LAB_EDGE_CENTER? */
 		default:
-			edge = WLR_EDGE_NONE;
+			edge = LAB_EDGE_NONE;
 		}
 	}
 
 	if (want_region && view->tiled_region) {
 		/* Region-snapped views are considered tiled on all edges */
-		edge = WLR_EDGE_LEFT | WLR_EDGE_RIGHT |
+		edge = LAB_EDGES_ALL;
-			WLR_EDGE_TOP | WLR_EDGE_BOTTOM;
 	}
 
 	uint32_t serial =

src/xwayland.c

@@ -280,7 +280,7 @@ handle_request_move(struct wl_listener *listener, void *data)
 	 */
 	struct view *view = wl_container_of(listener, view, request_move);
 	if (view == view->server->seat.pressed.view) {
-		interactive_begin(view, LAB_INPUT_STATE_MOVE, 0);
+		interactive_begin(view, LAB_INPUT_STATE_MOVE, LAB_EDGE_NONE);
 	}
 }