action: allow configurable policy in AutoPlace action

Closes: #1784.

docs/labwc-actions.5.scd

@@ -251,9 +251,12 @@ Actions are used in menus and keyboard/mouse bindings.
 	*output_name* The name of virtual output. If not supplied, will remove
 	the last virtual output added.
 
-*<action name="AutoPlace" />*
-	Use the automatic placement policy to move the active window to a
-	position on its output that will minimize overlap with other windows.
+*<action name="AutoPlace" policy="value"/>*
+	Reposition the window according to the desired placement policy.
+
+	*policy* [automatic|cursor|center] Use the specified policy, which has
+	the same meaning as the corresponding value for *<placement><policy>*.
+	Default is automatic.
 
 *<action name="Shade" />*++
 *<action name="Unshade" />*++

include/config/rcxml.h

@@ -16,7 +16,8 @@
 #include "theme.h"
 
 enum view_placement_policy {
-	LAB_PLACE_CENTER = 0,
+	LAB_PLACE_INVALID = 0,
+	LAB_PLACE_CENTER,
 	LAB_PLACE_CURSOR,
 	LAB_PLACE_AUTOMATIC
 };

include/view.h

@@ -456,10 +456,13 @@ int view_effective_height(struct view *view, bool use_pending);
 void view_center(struct view *view, const struct wlr_box *ref);
 
 /**
- * view_place_initial - apply initial placement strategy to view
+ * view_place_by_policy - apply placement strategy to view
  * @view: view to be placed
+ * @allow_cursor: set to false to ignore center-on-cursor policy
+ * @policy: placement policy to apply
  */
-void view_place_initial(struct view *view, bool allow_cursor);
+void view_place_by_policy(struct view *view, bool allow_cursor,
+	enum view_placement_policy);
 void view_constrain_size_to_that_of_usable_area(struct view *view);
 
 void view_restore_to(struct view *view, struct wlr_box geometry);
@@ -525,6 +528,7 @@ struct output *view_get_adjacent_output(struct view *view, enum view_edge edge,
 	bool wrap);
 enum view_axis view_axis_parse(const char *direction);
 enum view_edge view_edge_parse(const char *direction);
+enum view_placement_policy view_placement_parse(const char *policy);
 
 /* xdg.c */
 struct wlr_xdg_surface *xdg_surface_from_view(struct view *view);

src/action.c

@@ -422,6 +422,19 @@ action_arg_from_xml_node(struct action *action, const char *nodename, const char
 			goto cleanup;
 		}
 		break;
+	case ACTION_TYPE_AUTO_PLACE:
+		if (!strcmp(argument, "policy")) {
+			enum view_placement_policy policy =
+				view_placement_parse(content);
+			if (policy == LAB_PLACE_INVALID) {
+				wlr_log(WLR_ERROR, "Invalid argument for action %s: '%s' (%s)",
+						action_names[action->type], argument, content);
+			} else {
+				action_arg_add_int(action, argument, policy);
+			}
+			goto cleanup;
+		}
+		break;
 	}
 
 	wlr_log(WLR_ERROR, "Invalid argument for action %s: '%s'",
@@ -1030,10 +1043,10 @@ actions_run(struct view *activator, struct server *server,
 			break;
 		case ACTION_TYPE_AUTO_PLACE:
 			if (view) {
-				struct wlr_box geometry = view->pending;
-				if (placement_find_best(view, &geometry)) {
-					view_move(view, geometry.x, geometry.y);
-				}
+				enum view_placement_policy policy =
+					action_get_int(action, "policy", LAB_PLACE_AUTOMATIC);
+				view_place_by_policy(view,
+					/* allow_cursor */ true, policy);
 			}
 			break;
 		case ACTION_TYPE_TOGGLE_TEARING:

src/config/rcxml.c

@@ -873,11 +873,8 @@ entry(xmlNode *node, char *nodename, char *content)
 	} else if (!strcasecmp(nodename, "reuseOutputMode.core")) {
 		set_bool(content, &rc.reuse_output_mode);
 	} else if (!strcmp(nodename, "policy.placement")) {
-		if (!strcmp(content, "automatic")) {
-			rc.placement_policy = LAB_PLACE_AUTOMATIC;
-		} else if (!strcmp(content, "cursor")) {
-			rc.placement_policy = LAB_PLACE_CURSOR;
-		} else {
+		rc.placement_policy = view_placement_parse(content);
+		if (rc.placement_policy == LAB_PLACE_INVALID) {
 			rc.placement_policy = LAB_PLACE_CENTER;
 		}
 	} else if (!strcmp(nodename, "name.theme")) {

src/view.c

@@ -833,12 +833,13 @@ view_center(struct view *view, const struct wlr_box *ref)
 }
 
 void
-view_place_initial(struct view *view, bool allow_cursor)
+view_place_by_policy(struct view *view, bool allow_cursor,
+		enum view_placement_policy policy)
 {
-	if (allow_cursor && rc.placement_policy == LAB_PLACE_CURSOR) {
+	if (allow_cursor && policy == LAB_PLACE_CURSOR) {
 		view_move_to_cursor(view);
 		return;
-	} else if (rc.placement_policy == LAB_PLACE_AUTOMATIC) {
+	} else if (policy == LAB_PLACE_AUTOMATIC) {
 		struct wlr_box geometry = view->pending;
 		if (placement_find_best(view, &geometry)) {
 			view_move(view, geometry.x, geometry.y);
@@ -1866,6 +1867,24 @@ view_edge_parse(const char *direction)
 	}
 }
 
+enum view_placement_policy
+view_placement_parse(const char *policy)
+{
+	if (!policy) {
+		return LAB_PLACE_CENTER;
+	}
+
+	if (!strcasecmp(policy, "automatic")) {
+		return LAB_PLACE_AUTOMATIC;
+	} else if (!strcasecmp(policy, "cursor")) {
+		return LAB_PLACE_CURSOR;
+	} else if (!strcasecmp(policy, "center")) {
+		return LAB_PLACE_CENTER;
+	}
+
+	return LAB_PLACE_INVALID;
+}
+
 void
 view_snap_to_edge(struct view *view, enum view_edge edge,
 			bool across_outputs, bool store_natural_geometry)
@@ -1969,7 +1988,8 @@ view_move_to_output(struct view *view, struct output *output)
 		struct wlr_box output_area = output_usable_area_in_layout_coords(output);
 		view->pending.x = output_area.x;
 		view->pending.y = output_area.y;
-		view_place_initial(view, /* allow_cursor */ false);
+		view_place_by_policy(view,
+				/* allow_cursor */ false, rc.placement_policy);
 	} else if (view->maximized != VIEW_AXIS_NONE) {
 		view_apply_maximized_geometry(view);
 	} else if (view->tiled) {

src/xdg.c

@@ -530,7 +530,7 @@ set_initial_position(struct view *view)
 	}
 
 	/* All other views are placed according to a configured strategy */
-	view_place_initial(view, /* allow_cursor */ true);
+	view_place_by_policy(view, /* allow_cursor */ true, rc.placement_policy);
 }
 
 static const char *

src/xwayland.c

@@ -571,7 +571,8 @@ set_initial_position(struct view *view,
 		view_constrain_size_to_that_of_usable_area(view);
 
 		if (view_is_floating(view)) {
-			view_place_initial(view, /* allow_cursor */ true);
+			view_place_by_policy(view,
+				/* allow_cursor */ true, rc.placement_policy);
 		} else {
 			/*
 			 * View is maximized/fullscreen. Center the