From 969b64ecce695a468b80108184194be0a2c1ae6d Mon Sep 17 00:00:00 2001
From: Holger Schemel <info@artsoft.org>
Date: Fri, 17 Feb 2023 20:02:53 +0100
Subject: [PATCH] added functions for setting and getting screen borders for
 gadgets

---
 src/editor.c          |  2 ++
 src/libgame/gadgets.c | 28 +++++++++++++++++++++++++++-
 src/libgame/gadgets.h |  1 +
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/editor.c b/src/editor.c
index ab9b1c00..b202aaf8 100644
--- a/src/editor.c
+++ b/src/editor.c
@@ -7315,6 +7315,8 @@ void CreateLevelEditorGadgets(void)
 
   use_permanent_palette = !editor.palette.show_as_separate_screen;
 
+  InitGadgetScreenBorders(-1, INFOTEXT_YPOS);
+
   ReinitializeElementList();
 
   CreateControlButtons();
diff --git a/src/libgame/gadgets.c b/src/libgame/gadgets.c
index 89eb0081..0f221a73 100644
--- a/src/libgame/gadgets.c
+++ b/src/libgame/gadgets.c
@@ -38,6 +38,8 @@ static struct GadgetInfo *gadget_list_last_entry = NULL;
 static struct GadgetInfo *last_info_gi = NULL;
 static int next_free_gadget_id = 1;
 static boolean gadget_id_wrapped = FALSE;
+static int gadget_screen_border_right = -1;
+static int gadget_screen_border_bottom = -1;
 
 static void (*PlayGadgetSoundActivating)(void) = NULL;
 static void (*PlayGadgetSoundSelecting)(void) = NULL;
@@ -50,6 +52,30 @@ void InitGadgetsSoundCallback(void (*activating_function)(void),
   PlayGadgetSoundSelecting = selecting_function;
 }
 
+void InitGadgetScreenBorders(int border_right, int border_bottom)
+{
+  gadget_screen_border_right  = border_right;
+  gadget_screen_border_bottom = border_bottom;
+}
+
+static int getGadgetScreenBorderRight(void)
+{
+  if (gadget_screen_border_right < gfx.sx ||
+      gadget_screen_border_right > gfx.sx + gfx.sxsize)
+    return gfx.sx + gfx.sxsize;
+
+  return gadget_screen_border_right;
+}
+
+static int getGadgetScreenBorderBottom(void)
+{
+  if (gadget_screen_border_bottom < gfx.sy ||
+      gadget_screen_border_bottom > gfx.sy + gfx.sysize)
+    return gfx.sy + gfx.sysize;
+
+  return gadget_screen_border_bottom;
+}
+
 static struct GadgetInfo *getGadgetInfoFromGadgetID(int id)
 {
   struct GadgetInfo *gi = gadget_list_first_entry;
@@ -1262,7 +1288,7 @@ static void HandleGadgetTags(struct GadgetInfo *gi, int first_tag, va_list ap)
     int border_xsize = gi->border.xsize;
     int border_ysize = gi->border.ysize;
     int button_size = gi->border.xsize_selectbutton;
-    int bottom_screen_border = gfx.sy + gfx.sysize - font_height;
+    int bottom_screen_border = getGadgetScreenBorderBottom();
     Bitmap *src_bitmap;
     int src_x, src_y;
 
diff --git a/src/libgame/gadgets.h b/src/libgame/gadgets.h
index b2b43588..ad9e939c 100644
--- a/src/libgame/gadgets.h
+++ b/src/libgame/gadgets.h
@@ -276,6 +276,7 @@ struct GadgetInfo
 
 void InitGadgetsSoundCallback(void (*activating_function)(void),
 			      void (*selecting_function)(void));
+void InitGadgetScreenBorders(int, int);
 
 struct GadgetInfo *CreateGadget(int, ...);
 void FreeGadget(struct GadgetInfo *);
-- 
2.34.1