Use container under cursor for mouse bindings

This matches i3's behavior of executing mouse bindings in regards to the
container under the cursor instead of what is focused.

2 files changed, 24 insertions, 9 deletions

diff --git a/sway/commands/bind.c b/sway/commands/bind.c
index 59116d67..172e6b8a 100644
--- a/sway/commands/bind.c
+++ b/sway/commands/bind.c
@@ -1,10 +1,11 @@
 #define _POSIX_C_SOURCE 200809L
 #include <libevdev/libevdev.h>
 #include <linux/input-event-codes.h>
-#include <xkbcommon/xkbcommon.h>
-#include <xkbcommon/xkbcommon-names.h>
 #include <string.h>
 #include <strings.h>
+#include <xkbcommon/xkbcommon.h>
+#include <xkbcommon/xkbcommon-names.h>
+#include <wlr/types/wlr_cursor.h>
 #include "sway/commands.h"
 #include "sway/config.h"
 #include "sway/input/cursor.h"
@@ -330,7 +331,20 @@ struct cmd_results *cmd_bindcode(int argc, char **argv) {
 void seat_execute_command(struct sway_seat *seat, struct sway_binding *binding) {
         sway_log(SWAY_DEBUG, "running command for binding: %s", binding->command);
 
-        list_t *res_list = execute_command(binding->command, seat, NULL);
+        struct sway_container *con = NULL;
+        if (binding->type == BINDING_MOUSESYM
+                        || binding->type == BINDING_MOUSECODE) {
+                struct wlr_surface *surface = NULL;
+                double sx, sy;
+                struct sway_node *node = node_at_coords(seat,
+                                seat->cursor->cursor->x, seat->cursor->cursor->y,
+                                &surface, &sx, &sy);
+                if (node && node->type == N_CONTAINER) {
+                        con = node->sway_container;
+                }
+        }
+
+        list_t *res_list = execute_command(binding->command, seat, con);
         bool success = true;
         for (int i = 0; i < res_list->length; ++i) {
                 struct cmd_results *results = res_list->items[i];
diff --git a/sway/sway.5.scd b/sway/sway.5.scd
index b6955acd..76467d23 100644
--- a/sway/sway.5.scd
+++ b/sway/sway.5.scd
@@ -293,12 +293,13 @@ runtime.
         overwrite a binding, swaynag will give you a warning. To silence this, use
         the _--no-warn_ flag.
 
-        Mouse buttons can either be specified in the form _button[1-9]_ or by using
-        the name of the event code (ex _BTN\_LEFT_ or _BTN\_RIGHT_). For the former
-        option, the buttons will be mapped to their values in X11 (1=left, 2=middle,
-        3=right, 4=scroll up, 5=scroll down, 6=scroll left, 7=scroll right, 8=back,
-        9=forward). For the latter option, you can find the event names using
-        _libinput debug-events_.
+        Mouse bindings operate on the container under the cursor instead of the
+        container that has focus. Mouse buttons can either be specified in the form
+        _button[1-9]_ or by using the name of the event code (ex _BTN\_LEFT_ or
+        _BTN\_RIGHT_). For the former option, the buttons will be mapped to their
+        values in X11 (1=left, 2=middle, 3=right, 4=scroll up, 5=scroll down,
+        6=scroll left, 7=scroll right, 8=back, 9=forward). For the latter option,
+        you can find the event names using _libinput debug-events_.
         
         _--whole-window_, _--border_, and _--exclude-titlebar_ are mouse-only options
         which affect the region in which the mouse bindings can be triggered.  By