action: add 'MoveToEdge'

Currently only moves view to edges of outputs

Example keybind:

<keybind key="A-Left">
  <action name="MoveToEdge">
    <direction>left</direction>
  </action>
</keybind>

docs/rc.xml

@@ -32,6 +32,11 @@
     <keybind key="A-F3"><action name="Execute"><command>bemenu-run</command></action></keybind>
     <keybind key="A-F4"><action name="Close" /></keybind>
     <keybind key="W-a"><action name="ToggleMaximize" /></keybind>
+
+    <keybind key="A-Left"><action name="MoveToEdge"><direction>left</direction></action></keybind>
+    <keybind key="A-Right"><action name="MoveToEdge"><direction>right</direction></action></keybind>
+    <keybind key="A-Up"><action name="MoveToEdge"><direction>up</direction></action></keybind>
+    <keybind key="A-Down"><action name="MoveToEdge"><direction>down</direction></action></keybind>
   </keyboard>
 
 </labwc_config>

src/action.c

@@ -39,6 +39,8 @@ action(struct server *server, const char *action, const char *command)
 		free(cmd.buf);
 	} else if (!strcasecmp(action, "Exit")) {
 		wl_display_terminate(server->wl_display);
+	} else if (!strcasecmp(action, "MoveToEdge")) {
+		view_move_to_edge(topmost_mapped_view(server), command);
 	} else if (!strcasecmp(action, "NextWindow")) {
 		server->cycle_view =
 			desktop_cycle_view(server, server->cycle_view);

src/config/rcxml.c

@@ -52,6 +52,8 @@ fill_keybind(char *nodename, char *content)
 		current_keybind->action = strdup(content);
 	} else if (!strcmp(nodename, "command.action")) {
 		current_keybind->command = strdup(content);
+	} else if (!strcmp(nodename, "direction.action")) {
+		current_keybind->command = strdup(content);
 	} else if (!strcmp(nodename, "menu.action")) {
 		current_keybind->command = strdup(content);
 	}

src/view.c

@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <strings.h>
 #include "labwc.h"
 #include "ssd.h"
 
@@ -130,3 +131,50 @@ view_for_each_popup_surface(struct view *view, wlr_surface_iterator_func_t itera
 	view->impl->for_each_popup_surface(view, iterator, data);
 }
 
+static struct border
+view_border(struct view *view)
+{
+	struct border border = {
+		.left = view->margin.left - view->padding.left,
+		.top = view->margin.top - view->padding.top,
+		.right = view->margin.right + view->padding.right,
+		.bottom = view->margin.bottom + view->padding.bottom,
+	};
+	return border;
+}
+
+#define GAP (3)
+void
+view_move_to_edge(struct view *view, char *direction)
+{
+	if (!view) {
+		wlr_log(WLR_ERROR, "no view");
+		return;
+	}
+	struct output *output = view_output(view);
+	struct border border = view_border(view);
+	struct wlr_box usable;
+	memcpy(&usable, &output->usable_area, sizeof(struct wlr_box));
+
+	double ox = 0, oy = 0;
+	wlr_output_layout_output_coords(view->server->output_layout,
+		output->wlr_output, &ox, &oy);
+	usable.x -= ox;
+	usable.y -= oy;
+
+	int x, y;
+	if (!strcasecmp(direction, "left")) {
+		x = usable.x + border.left + GAP;
+		y = view->y;
+	} else if (!strcasecmp(direction, "up")) {
+		x = view->x;
+		y = usable.y + border.top + GAP;
+	} else if (!strcasecmp(direction, "right")) {
+		x = usable.x + usable.width - view->w - border.right - GAP;
+		y = view->y;
+	} else if (!strcasecmp(direction, "down")) {
+		x = view->x;
+		y = usable.y + usable.height - view->h - border.bottom - GAP;
+	}
+	view_move(view, x, y);
+}