arrange: remove gaps for workspace location deltas

When arranging the workspace, prev_x and prev_y should be ignoring the
current gaps otherwise the workspace diff_x and diff_y location deltas
will be off. When the deltas are off, each arrangement of the workspace
would incorrectly move floaters an extra -workspace->current_gaps.left
along the x-axis and an extra -workspace->current_gaps.top along the
y-axis.

1 files changed, 2 insertions, 2 deletions

diff --git a/sway/tree/arrange.c b/sway/tree/arrange.c
index 696d0e1f..7b88b3a2 100644
--- a/sway/tree/arrange.c
+++ b/sway/tree/arrange.c
@@ -262,8 +262,8 @@ void arrange_workspace(struct sway_workspace *workspace) {
                         area->width, area->height, area->x, area->y);
 
         bool first_arrange = workspace->width == 0 && workspace->height == 0;
-        double prev_x = workspace->x;
-        double prev_y = workspace->y;
+        double prev_x = workspace->x - workspace->current_gaps.left;
+        double prev_y = workspace->y - workspace->current_gaps.top;
         workspace->width = area->width;
         workspace->height = area->height;
         workspace->x = output->lx + area->x;