Remove cursor warping from seat_set_focus

Because cursor warping was the default behaviour in seat_set_focus,
there may be cases where we may have been warping the cursor
unintentionally. This patch removes cursor warping from seat_set_focus
and only does it in the focus command. This is managed by a static
function in focus.c.

To know whether to warp or not, we need to know which node had focus
previously. To keep track of this easily, seat->prev_focus has been
introduced and is set to the previous in seat_set_focus.

2 files changed, 26 insertions, 7 deletions

diff --git a/sway/commands/focus.c b/sway/commands/focus.c
index 44adb95b..46304ae0 100644
--- a/sway/commands/focus.c
+++ b/sway/commands/focus.c
@@ -34,6 +34,24 @@ static bool parse_movement_direction(const char *name,
         return true;
 }
 
+static void consider_warp_to_focus(struct sway_seat *seat) {
+        struct sway_node *focus = seat_get_focus(seat);
+        if (config->mouse_warping == WARP_NO || !focus || !seat->prev_focus) {
+                return;
+        }
+        if (config->mouse_warping == WARP_OUTPUT &&
+                        node_get_output(focus) == node_get_output(seat->prev_focus)) {
+                return;
+        }
+
+        if (focus->type == N_CONTAINER) {
+                cursor_warp_to_container(seat->cursor, focus->sway_container);
+        } else {
+                cursor_warp_to_workspace(seat->cursor, focus->sway_workspace);
+        }
+        cursor_send_pointer_motion(seat->cursor, 0, false);
+}
+
 /**
  * Get node in the direction of newly entered output.
  */
@@ -181,7 +199,7 @@ static struct cmd_results *focus_mode(struct sway_workspace *ws,
         }
         if (new_focus) {
                 seat_set_focus_container(seat, new_focus);
-                cursor_send_pointer_motion(seat->cursor, 0, true);
+                consider_warp_to_focus(seat);
         } else {
                 return cmd_results_new(CMD_FAILURE, "focus",
                                 "Failed to find a %s container in workspace",
@@ -214,7 +232,7 @@ static struct cmd_results *focus_output(struct sway_seat *seat,
         free(identifier);
         if (output) {
                 seat_set_focus(seat, seat_get_focus_inactive(seat, &output->node));
-                cursor_send_pointer_motion(seat->cursor, 0, true);
+                consider_warp_to_focus(seat);
         }
 
         return cmd_results_new(CMD_SUCCESS, NULL, NULL);
@@ -235,6 +253,7 @@ struct cmd_results *cmd_focus(int argc, char **argv) {
 
         if (argc == 0 && container) {
                 seat_set_focus_container(seat, container);
+                consider_warp_to_focus(seat);
                 cursor_send_pointer_motion(seat->cursor, 0, true);
                 return cmd_results_new(CMD_SUCCESS, NULL, NULL);
         }
@@ -264,7 +283,7 @@ struct cmd_results *cmd_focus(int argc, char **argv) {
                 struct sway_node *focus = seat_get_active_tiling_child(seat, node);
                 if (focus) {
                         seat_set_focus(seat, focus);
-                        cursor_send_pointer_motion(seat->cursor, 0, true);
+                        consider_warp_to_focus(seat);
                 }
                 return cmd_results_new(CMD_SUCCESS, NULL, NULL);
         }
@@ -284,7 +303,7 @@ struct cmd_results *cmd_focus(int argc, char **argv) {
                 struct sway_node *node =
                         get_node_in_output_direction(new_output, direction);
                 seat_set_focus(seat, node);
-                cursor_send_pointer_motion(seat->cursor, 0, true);
+                consider_warp_to_focus(seat);
                 return cmd_results_new(CMD_SUCCESS, NULL, NULL);
         }
 
@@ -292,7 +311,7 @@ struct cmd_results *cmd_focus(int argc, char **argv) {
                 node_get_in_direction(container, seat, direction);
         if (next_focus) {
                 seat_set_focus(seat, next_focus);
-                cursor_send_pointer_motion(seat->cursor, 0, true);
+                consider_warp_to_focus(seat);
         }
 
         return cmd_results_new(CMD_SUCCESS, NULL, NULL);
diff --git a/sway/commands/swap.c b/sway/commands/swap.c
index 9cc0d5c2..8a6dfdbd 100644
--- a/sway/commands/swap.c
+++ b/sway/commands/swap.c
@@ -61,13 +61,13 @@ static void swap_focus(struct sway_container *con1,
                 enum sway_container_layout layout2 = container_parent_layout(con2);
                 if (focus == con1 && (layout2 == L_TABBED || layout2 == L_STACKED)) {
                         if (workspace_is_visible(ws2)) {
-                                seat_set_focus_warp(seat, &con2->node, false);
+                                seat_set_focus(seat, &con2->node);
                         }
                         seat_set_focus_container(seat, ws1 != ws2 ? con2 : con1);
                 } else if (focus == con2 && (layout1 == L_TABBED
                                         || layout1 == L_STACKED)) {
                         if (workspace_is_visible(ws1)) {
-                                seat_set_focus_warp(seat, &con1->node, false);
+                                seat_set_focus(seat, &con1->node);
                         }
                         seat_set_focus_container(seat, ws1 != ws2 ? con1 : con2);
                 } else if (ws1 != ws2) {