From 1c4e3a367cd49efc7f1a2e687434aac17323d198 Mon Sep 17 00:00:00 2001
From: dalem <lain@dalem.foo>
Date: Sat, 21 Feb 2026 23:36:28 +0100
Subject: [PATCH] Add an offset on the Y axis to the panel protocol

This adds an option to offset the geometry of a panel by set amount of pixels

New function provided and accesible via the protocol: set_y_offset
---
 libswc/panel.c   | 17 +++++++++++++++--
 protocol/swc.xml |  7 +++++--
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/libswc/panel.c b/libswc/panel.c
index 89623ea..361de98 100644
--- a/libswc/panel.c
+++ b/libswc/panel.c
@@ -46,6 +46,7 @@ struct panel {
 	struct screen_modifier modifier;
 	uint32_t edge;
 	uint32_t offset, strut_size;
+	uint32_t y_offset;
 	bool docked;
 };
 
@@ -58,11 +59,11 @@ update_position(struct panel *panel)
 	switch (panel->edge) {
 	case SWC_PANEL_EDGE_TOP:
 		x = screen->x + panel->offset;
-		y = screen->y;
+		y = screen->y + panel->y_offset;
 		break;
 	case SWC_PANEL_EDGE_BOTTOM:
 		x = screen->x + panel->offset;
-		y = screen->y + screen->height - view->height;
+		y = screen->y + screen->height - view->height - panel->y_offset;
 		break;
 	case SWC_PANEL_EDGE_LEFT:
 		x = screen->x;
@@ -133,6 +134,16 @@ set_offset(struct wl_client *client, struct wl_resource *resource, uint32_t offs
 		update_position(panel);
 }
 
+static void
+set_y_offset(struct wl_client *client, struct wl_resource *resource, uint32_t offset)
+{
+	struct panel *panel = wl_resource_get_user_data(resource);
+
+	panel->y_offset = offset;
+	if (panel->docked)
+		update_position(panel);
+}
+
 static void
 set_strut(struct wl_client *client, struct wl_resource *resource, uint32_t size, uint32_t begin, uint32_t end)
 {
@@ -146,6 +157,7 @@ set_strut(struct wl_client *client, struct wl_resource *resource, uint32_t size,
 static const struct swc_panel_interface panel_impl = {
 	.dock = dock,
 	.set_offset = set_offset,
+	.set_y_offset = set_y_offset,
 	.set_strut = set_strut,
 };
 
@@ -242,6 +254,7 @@ panel_new(struct wl_client *client, uint32_t version, uint32_t id, struct surfac
 	panel->modifier.modify = &modify;
 	panel->screen = NULL;
 	panel->offset = 0;
+	panel->y_offset = 0;
 	panel->strut_size = 0;
 	panel->docked = false;
 	wl_list_insert(&panel->view->base.handlers, &panel->view_handler.link);
diff --git a/protocol/swc.xml b/protocol/swc.xml
index 0080236..6b1d74f 100644
--- a/protocol/swc.xml
+++ b/protocol/swc.xml
@@ -37,7 +37,7 @@
         </request>
     </interface>
 
-    <interface name="swc_panel" version="1">
+    <interface name="swc_panel" version="2">
         <enum name="edge">
             <entry name="top" value="0" />
             <entry name="bottom" value="1" />
@@ -56,6 +56,10 @@
             <arg name="offset" type="uint" />
         </request>
 
+        <request name="set_y_offset">
+            <arg name="offset" type="uint" />
+        </request>
+
         <request name="set_strut">
             <arg name="size" type="uint" />
             <arg name="begin" type="uint" />
@@ -67,4 +71,3 @@
         </event>
     </interface>
 </protocol>
-