Implement tiling_drag_threshold

Implements `tiling_drag_threshold <threshold>` to prevent accidental
dragging of tiling containers. If a container (and all of its
descendants) are unfocused and the tile bar is pressed, a threshold
will be used before actually starting the drag. Once the threshold has
been exceeded, the cursor will change to the grab icon and the operation
will switch from `OP_MOVE_TILING_THRESHOLD` to `OP_MOVE_TILING`.

3 files changed, 7 insertions, 0 deletions

diff --git a/include/sway/commands.h b/include/sway/commands.h
index 0e2d7931..7d0ff838 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -172,6 +172,7 @@ sway_cmd cmd_swaybg_command;
 sway_cmd cmd_swaynag_command;
 sway_cmd cmd_swap;
 sway_cmd cmd_tiling_drag;
+sway_cmd cmd_tiling_drag_threshold;
 sway_cmd cmd_title_align;
 sway_cmd cmd_title_format;
 sway_cmd cmd_titlebar_border_thickness;
diff --git a/include/sway/config.h b/include/sway/config.h
index f604b054..ebf16e6a 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -426,7 +426,9 @@ struct sway_config {
         bool auto_back_and_forth;
         bool show_marks;
         enum alignment title_align;
+
         bool tiling_drag;
+        int tiling_drag_threshold;
 
         bool smart_gaps;
         int gaps_inner;
diff --git a/include/sway/input/seat.h b/include/sway/input/seat.h
index d665c86e..a3c20346 100644
--- a/include/sway/input/seat.h
+++ b/include/sway/input/seat.h
@@ -39,6 +39,7 @@ enum sway_seat_operation {
         OP_NONE,
         OP_DOWN,
         OP_MOVE_FLOATING,
+        OP_MOVE_TILING_THRESHOLD,
         OP_MOVE_TILING,
         OP_RESIZE_FLOATING,
         OP_RESIZE_TILING,
@@ -186,6 +187,9 @@ void seat_begin_down(struct sway_seat *seat, struct sway_container *con,
 void seat_begin_move_floating(struct sway_seat *seat,
                 struct sway_container *con, uint32_t button);
 
+void seat_begin_move_tiling_threshold(struct sway_seat *seat,
+                struct sway_container *con, uint32_t button);
+
 void seat_begin_move_tiling(struct sway_seat *seat,
                 struct sway_container *con, uint32_t button);