Adding LG3D patch

README.md

@@ -15,7 +15,7 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
 
 ### Changelog:
 
-2021-03-09 - Added the tab patch
+2021-03-09 - Added the tab patch and the LG3D patch
 
 2021-02-11 - Added the riodraw and focusdir patches
 
@@ -400,6 +400,10 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
    - [~leftlayout~](http://dwm.suckless.org/patches/leftlayout/)
       - ~moves the layout symbol in the status bar to the left hand side~
 
+   - LG3D
+      - changes the window manager name to "LG3d" instead of "dwm" as a workaround for Java applications that assume that the window manager is using window reparenting
+      - refer to the ISSUES secton of the dwm man page for more details
+
    - [losefullscreen](https://github.com/bakkeby/patches/wiki/losefullscreen/)
       - by default in dwm it is possible to make an application fullscreen, then use the focusstack keybindings to focus on other windows beneath the current window
       - it is also possible to spawn new windows (e.g. a terminal) that end up getting focus while the previous window remains in fullscreen

dwm.c

@@ -1020,7 +1020,10 @@ attachstack(Client *c)
 void
 buttonpress(XEvent *e)
 {
-	int click, i, x, r;
+	int click, i, r;
+	#if TAB_PATCH
+	int x;
+	#endif // TAB_PATCH
 	Arg arg = {0};
 	Client *c;
 	Monitor *m;
@@ -3518,8 +3521,13 @@ setup(void)
 	wmcheckwin = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 0, 0, 0);
 	XChangeProperty(dpy, wmcheckwin, netatom[NetWMCheck], XA_WINDOW, 32,
 		PropModeReplace, (unsigned char *) &wmcheckwin, 1);
+	#if LG3D_PATCH
+	XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
+		PropModeReplace, (unsigned char *) "LG3D", 4);
+	#else
 	XChangeProperty(dpy, wmcheckwin, netatom[NetWMName], utf8string, 8,
 		PropModeReplace, (unsigned char *) "dwm", 3);
+	#endif // LG3D_PATCH
 	XChangeProperty(dpy, root, netatom[NetWMCheck], XA_WINDOW, 32,
 		PropModeReplace, (unsigned char *) &wmcheckwin, 1);
 	/* EWMH support per view */

patches.def.h

@@ -603,6 +603,12 @@
  */
 #define KILLUNSEL_PATCH 0
 
+/* This changes the window manager name to LG3d instead of dwm as a workaround for Java
+ * applications that assume that the window manager is using window reparenting.
+ * Refer to the ISSUES secton of the dwm man page for more details.
+ */
+#define LG3D_PATCH 0
+
 /* By default in dwm it is possible to make an application fullscreen, then use
  * the focusstack keybindings to focus on other windows beneath the current window.
  * It is also possible to spawn new windows (e.g. a terminal) that end up getting