Allows the user to specify the position on the screen where a window should be spawned in percentage of the screen size.

dwm-floatrules-relative-to-screen-size.patch

commit a6d41f067eb1bc64eb5d721df4d2880c457fe82a
Author: mjkloeckner <[email protected]>
Date:   Sat Apr 15 21:09:02 2023 -0300

    flaotrules relative to monitor size
    
    floatrules now accepts a new option which is `isrel` in case of being 1
    the floatx, floaty, floatw, floath can be specified in terms of the
    percentage of the monitor with floating values in the range 0.00 - 1.00,
    being 0.00: 0% and 1.00: 100%, 0.50: 50%, etc.

diff --git a/config.def.h b/config.def.h
index 9006959..fae47ca 100644
--- a/config.def.h
+++ b/config.def.h
@@ -64,17 +64,17 @@ static const Rule rules[] = {
 	 *	WM_CLASS(STRING) = instance, class
 	 *	WM_NAME(STRING) = title
 	 */
-/*  class                 instance  title  tags mask  isfloating  monitor  float x,y,w,h    floatborderpx */
-    { "Gimp",             NULL,     NULL,  1<<6,      0,          -1,      50,50,500,500,   0 },
-    { "scratchpad",       NULL,     NULL,  0,         1,          -1,      80,50,1284,954,  0 },
+/*  class                 instance  title  tags mask  isfloating  monitor  isrel  x,y,    w,    h,   floatborderpx */
+    { "Gimp",             NULL,     NULL,  1<<6,      0,          -1,      0,     0,0,  500,  500,   0,            },
+    { "scratchpad",       NULL,     NULL,  0,         1,          -1,      1,     0,0, 0.73,0.915,   1,            },
 };
 
 /* layout(s) */
diff --git a/dwm.c b/dwm.c
index 23132f3..c1b98ec 100644
--- a/dwm.c
+++ b/dwm.c
@@ -174,7 +174,8 @@ typedef struct {
 	unsigned int tags;
 	int isfloating;
 	int monitor;
-	int floatx, floaty, floatw, floath;
+	int isrel;
+	float floatx, floaty, floatw, floath;
 	int floatborderpx;
 } Rule;
 
@@ -388,10 +389,17 @@ applyrules(Client *c)
 				c->hasfloatbw = 1;
 			}
 			if (r->isfloating) {
-				if (r->floatx >= 0) c->x = c->mon->mx + r->floatx;
-				if (r->floaty >= 0) c->y = c->mon->my + r->floaty;
-				if (r->floatw >= 0) c->w = r->floatw;
-				if (r->floath >= 0) c->h = r->floath;
+				if (r->isrel) {
+					if (r->floatx >= 0) c->x = c->mon->mx + r->floatx;
+					if (r->floaty >= 0) c->y = c->mon->my + r->floaty;
+					if (r->floatw >= 0) c->w = c->mon->mw * r->floatw;
+					if (r->floath >= 0) c->h = c->mon->mh * r->floath;
+				} else {
+					if (r->floatx >= 0) c->x = c->mon->mx + (int)r->floatx;
+					if (r->floaty >= 0) c->y = c->mon->my + (int)r->floaty;
+					if (r->floatw >= 0) c->w = r->floatw;
+					if (r->floath >= 0) c->h = r->floath;
+				}
 			}
 			for (m = mons; m && m->num != r->monitor; m = m->next);
 			if (m)

Made to be applied on top of dwm floatrules patch.

Allows the user to specify the position on the screen where a window should be
spawned in percentage of the screen size.

To specify the position in percentage of the screen size you should set isrel
to 1 in the rules array for the given application.