add window centering

the user can now center any floating window with default bind
centre_window

3 files changed, 20 insertions, 3 deletions

diff --git a/src/defs.h b/src/defs.h
index 5476434..5796214 100644
--- a/src/defs.h
+++ b/src/defs.h
@@ -119,6 +119,7 @@ typedef struct {
 	Bool enabled;
 } Scratchpad;
 
+extern void centre_window();
 extern void close_focused(void);
 extern void dec_gaps(void);
 extern void focus_next(void);
@@ -139,4 +140,4 @@ extern void resize_stack_add(void);
 extern void resize_stack_sub(void);
 extern void toggle_floating(void);
 extern void toggle_floating_global(void);
-extern void toggle_fullscreen(void);
\ No newline at end of file
+extern void toggle_fullscreen(void);
diff --git a/src/parser.c b/src/parser.c
index eb0b1a8..79cf29b 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -37,6 +37,7 @@ static const struct {
                   {"toggle_floating", toggle_floating},
                   {"global_floating", toggle_floating_global},
                   {"fullscreen", toggle_fullscreen},
+                  {"centre_window", centre_window},
                   {NULL, NULL}};
 
 static void remap_and_dedupe_binds(Config *cfg)
@@ -691,4 +692,4 @@ const char **build_argv(const char *cmd)
 	free(tmp);
 	return argv;
 #endif
-}
\ No newline at end of file
+}
diff --git a/src/sxwm.c b/src/sxwm.c
index 5e86c75..8aa7bd8 100644
--- a/src/sxwm.c
+++ b/src/sxwm.c
@@ -38,6 +38,7 @@
 #include "parser.h"
 
 Client *add_client(Window w, int ws);
+/* void centre_window(); */
 void change_workspace(int ws);
 int clean_mask(int mask);
 /* void close_focused(void); */
@@ -253,6 +254,20 @@ Client *add_client(Window w, int ws)
 	return c;
 }
 
+void centre_window()
+{
+	if (!focused || !focused->mapped || !focused->floating) {
+		return;
+	}
+
+	int x = mons[focused->mon].x + (mons[focused->mon].w - focused->w) / 2;
+	int y = mons[focused->mon].y + (mons[focused->mon].h - focused->h) / 2;
+
+	focused->x = x;
+	focused->y = y;
+	XMoveWindow(dpy, focused->win, x, y);
+}
+
 void change_workspace(int ws)
 {
 	if (ws >= NUM_WORKSPACES || ws == current_ws) {
@@ -2657,4 +2672,4 @@ int main(int ac, char **av)
 	printf("sxwm: starting...\n");
 	run();
 	return 0;
-}
\ No newline at end of file
+}