[wip] Add MoveResizeTo

Loosely based on http://openbox.org/wiki/Help:Actions#MoveResizeTo

Only allows to use percent values for x, y, width and height attributes.
Does not support `monitor` argument.

Example config:
```xml
<!-- Resize via W-Numpad -->
<keybind key="W-KP_1">
    <action name="MoveResizeTo" x="0%" y="50%" height="50%" width="50%" />
</keybind>
<keybind key="W-KP_2">
    <action name="MoveResizeTo" x="0%" y="50%" height="50%" width="100%" />
</keybind>
<keybind key="W-KP_3">
    <action name="MoveResizeTo" x="50%" y="50%" height="50%" width="50%" />
</keybind>
<keybind key="W-KP_4">
    <action name="MoveResizeTo" x="0%" y="0%" height="100%" width="50%" />
</keybind>
<keybind key="W-KP_5">
    <action name="MoveResizeTo" />
</keybind>
<keybind key="W-KP_6">
    <action name="MoveResizeTo" x="50%" y="0%" height="100%" width="50%" />
</keybind>
<keybind key="W-KP_7">
    <action name="MoveResizeTo" x="0%" y="0%" height="50%" width="50%" />
</keybind>
<keybind key="W-KP_8">
    <action name="MoveResizeTo" x="0%" y="0%" height="50%" width="100%" />
</keybind>
<keybind key="W-KP_9">
    <action name="MoveResizeTo" x="50%" y="0%" height="50%" width="50%" />
</keybind>
```

Partly fixes #386

include/labwc.h

@@ -435,6 +435,8 @@ void view_adjust_for_layout_change(struct view *view);
 void view_discover_output(struct view *view);
 void view_move_to_edge(struct view *view, const char *direction);
 void view_snap_to_edge(struct view *view, const char *direction);
+void view_rel_move_resize_to(struct view *view, struct wlr_box *rel_box);
+
 const char *view_get_string_prop(struct view *view, const char *prop);
 void view_update_title(struct view *view);
 void view_update_app_id(struct view *view);

src/action.c

@@ -2,6 +2,7 @@
 #define _POSIX_C_SOURCE 200809L
 #include <assert.h>
 #include <signal.h>
+#include <limits.h>
 #include <string.h>
 #include <strings.h>
 #include <unistd.h>
@@ -38,6 +39,7 @@ enum action_type {
 	ACTION_TYPE_RESIZE,
 	ACTION_TYPE_GO_TO_DESKTOP,
 	ACTION_TYPE_SEND_TO_DESKTOP,
+	ACTION_TYPE_MOVE_RESIZE_TO,
 };
 
 const char *action_names[] = {
@@ -63,6 +65,7 @@ const char *action_names[] = {
 	"Resize",
 	"GoToDesktop",
 	"SendToDesktop",
+	"MoveResizeTo",
 	NULL
 };
 
@@ -336,6 +339,16 @@ actions_run(struct view *activator, struct server *server,
 				}
 			}
 			break;
+		case ACTION_TYPE_MOVE_RESIZE_TO:
+			if (!arg) {
+				wlr_log(WLR_ERROR, "Missing argument for MoveResizeTo");
+				break;
+			}
+			if (view) {
+				struct wlr_box *box = action_box_from_arg(arg);
+				view_rel_move_resize_to(view, box);
+			}
+			break;
 		case ACTION_TYPE_NONE:
 			wlr_log(WLR_ERROR, "Not executing unknown action");
 			break;

src/config/rcxml.c

@@ -32,6 +32,7 @@ static struct libinput_category *current_libinput_category;
 static const char *current_mouse_context;
 static struct action *current_keybind_action;
 static struct action *current_mousebind_action;
+static struct wlr_box *current_action_box;
 
 enum font_place {
 	FONT_PLACE_UNKNOWN = 0,
@@ -43,6 +44,21 @@ enum font_place {
 
 static void load_default_key_bindings(void);
 
+static void
+fill_geo(char *key, char *content)
+{
+	assert(current_action_box);
+	if (!strcmp(key, "x.action")) {
+		current_action_box->x = atoi(content);
+	} else if (!strcmp(key, "y.action")) {
+		current_action_box->y = atoi(content);
+	} else if (!strcmp(key, "width.action")) {
+		current_action_box->width = atoi(content);
+	} else if (!strcmp(key, "height.action")) {
+		current_action_box->height = atoi(content);
+	}
+}
+
 static void
 fill_keybind(char *nodename, char *content)
 {
@@ -68,6 +84,12 @@ fill_keybind(char *nodename, char *content)
 		current_keybind_action = action_create(content);
 		wl_list_insert(current_keybind->actions.prev,
 			&current_keybind_action->link);
+		if (!strcmp(content, "MoveResizeTo")) {
+			current_action_box = action_arg_add_box(
+				current_keybind_action, NULL);
+		} else {
+			current_action_box = NULL;
+		}
 	} else if (!current_keybind_action) {
 		wlr_log(WLR_ERROR, "expect <action name=\"\"> element first. "
 			"nodename: '%s' content: '%s'", nodename, content);
@@ -83,6 +105,9 @@ fill_keybind(char *nodename, char *content)
 	} else if (!strcmp(nodename, "to.action")) {
 		/* GoToDesktop, SendToDesktop */
 		action_arg_add_str(current_keybind_action, NULL, content);
+	} else if (current_action_box) {
+		/* MoveResizeTo */
+		fill_geo(nodename, content);
 	}
 }
 

src/view.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #include <assert.h>
+#include <limits.h>
 #include <stdio.h>
 #include <strings.h>
 #include <xcb/xcb_icccm.h>
@@ -658,6 +659,41 @@ view_edge_parse(const char *direction)
 	}
 }
 
+/* Move and resize view based on percent output local values in rel_box */
+void
+view_rel_move_resize_to(struct view *view, struct wlr_box *rel_box)
+{
+	assert(view);
+	assert(rel_box);
+
+	struct output *output = view_output(view);
+	if (!output) {
+		return;
+	}
+	struct wlr_box usable = output_usable_area_in_layout_coords(output);
+
+	/* Calculate new size and position */
+	struct wlr_box new_geo = { view->x, view->y, view->w, view->h };
+	if (rel_box->x != INT_MIN) {
+		new_geo.x = usable.width * rel_box->x / 100;
+		new_geo.x += usable.x + view->margin.left;
+	}
+	if (rel_box->y != INT_MIN) {
+		new_geo.y = usable.height * rel_box->y / 100;
+		new_geo.y += usable.y + view->margin.top;
+	}
+	if (rel_box->width != INT_MIN) {
+		new_geo.width = usable.width * rel_box->width / 100;
+		new_geo.width -= view->margin.left + view->margin.right;
+	}
+	if (rel_box->height != INT_MIN) {
+		new_geo.height = usable.height * rel_box->height / 100;
+		new_geo.height -= view->margin.top + view->margin.bottom;
+	}
+
+	view_move_resize(view, new_geo);
+}
+
 void
 view_snap_to_edge(struct view *view, const char *direction)
 {