Adding ewmhtags patch

README.md

@@ -13,7 +13,7 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
 
 ### Changelog:
 
-2019-09-11 - Added monitor rules and combo patches
+2019-09-11 - Added monitor rules, combo and ewmhtags patches
 
 2019-09-10 - Minor tweaks to awesomebar patch (incl. alpha and systray compatibility). Added floatbordercolor patch.
 
@@ -65,6 +65,9 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
    - [cyclelayouts](https://dwm.suckless.org/patches/cyclelayouts/)
       - lets you cycle through all your layouts
 
+   - [ewmhtags](https://dwm.suckless.org/patches/ewmhtags/)
+      - adds EWMH support for \_NET_NUMBER_OF_DESKTOPS, \_NET_CURRENT_DESKTOP, \_NET_DESKTOP_NAMES and \_NET_DESKTOP_VIEWPORT, which allows for compatibility with other bars and programs that request workspace information, e.g. polybar's xworkspaces module
+
    - [fancybar](https://dwm.suckless.org/patches/fancybar/)
       - shows the titles of all visible windows in the status bar
 

config.def.h

@@ -62,7 +62,11 @@ static const char *colors[][3] = {
 #endif // FLOAT_BORDER_COLOR_PATCH
 
 /* tagging */
+#if EWMHTAGS_PATCH
+static char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
+#else
 static const char *tags[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
+#endif // EWMHTAGS_PATCH
 #if ALTERNATIVE_TAGS_PATCH
 static const char *tagsalt[] = { "1", "2", "3", "4", "5", "6", "7", "8", "9" };
 #endif // ALTERNATIVE_TAGS_PATCH

dwm.c

@@ -73,15 +73,18 @@ enum { SchemeNorm, SchemeSel, SchemeHid }; /* color schemes */
 #else
 enum { SchemeNorm, SchemeSel }; /* color schemes */
 #endif // #if AWESOMEBAR_PATCH
-#if SYSTRAY_PATCH
-enum { NetSupported, NetSystemTray, NetSystemTrayOP, NetSystemTrayOrientation, NetSystemTrayVisual,
-	   NetWMName, NetWMState, NetWMFullscreen, NetActiveWindow, NetWMWindowType, NetWMWindowTypeDock,
-	   NetSystemTrayOrientationHorz, NetWMWindowTypeDialog, NetClientList, NetWMCheck, NetLast }; /* EWMH atoms */
-#else
 enum { NetSupported, NetWMName, NetWMState, NetWMCheck,
        NetWMFullscreen, NetActiveWindow, NetWMWindowType,
-       NetWMWindowTypeDialog, NetClientList, NetLast }; /* EWMH atoms */
-#endif // SYSTRAY_PATCH
+	   #if SYSTRAY_PATCH
+       NetSystemTray, NetSystemTrayOP, NetSystemTrayOrientation,
+       NetSystemTrayVisual, NetWMWindowTypeDock, NetSystemTrayOrientationHorz,
+	   #endif // SYSTRAY_PATCH
+	   #if EWMHTAGS_PATCH
+       NetDesktopNames, NetDesktopViewport, NetNumberOfDesktops, NetCurrentDesktop,
+	   #endif // EWMHTAGS_PATCH
+       NetWMWindowTypeDialog, NetClientList, NetLast
+}; /* EWMH atoms */
+
 #if WINDOWROLERULE_PATCH
 enum { WMProtocols, WMDelete, WMState, WMTakeFocus, WMWindowRole, WMLast }; /* default atoms */
 #else
@@ -2220,6 +2223,12 @@ setup(void)
 	xatom[Xembed] = XInternAtom(dpy, "_XEMBED", False);
 	xatom[XembedInfo] = XInternAtom(dpy, "_XEMBED_INFO", False);
 	#endif // SYSTRAY_PATCH
+	#if EWMHTAGS_PATCH
+	netatom[NetDesktopViewport] = XInternAtom(dpy, "_NET_DESKTOP_VIEWPORT", False);
+	netatom[NetNumberOfDesktops] = XInternAtom(dpy, "_NET_NUMBER_OF_DESKTOPS", False);
+	netatom[NetCurrentDesktop] = XInternAtom(dpy, "_NET_CURRENT_DESKTOP", False);
+	netatom[NetDesktopNames] = XInternAtom(dpy, "_NET_DESKTOP_NAMES", False);
+	#endif // EWMHTAGS_PATCH
 	netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
 	netatom[NetWMState] = XInternAtom(dpy, "_NET_WM_STATE", False);
 	netatom[NetWMCheck] = XInternAtom(dpy, "_NET_SUPPORTING_WM_CHECK", False);
@@ -2263,6 +2272,12 @@ setup(void)
 	/* EWMH support per view */
 	XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
 		PropModeReplace, (unsigned char *) netatom, NetLast);
+	#if EWMHTAGS_PATCH
+	setnumdesktops();
+	setcurrentdesktop();
+	setdesktopnames();
+	setviewport();
+	#endif // EWMHTAGS_PATCH
 	XDeleteProperty(dpy, root, netatom[NetClientList]);
 	/* select events */
 	wa.cursor = cursor[CurNormal]->cursor;
@@ -2445,6 +2460,9 @@ toggletag(const Arg *arg)
 		focus(NULL);
 		arrange(selmon);
 	}
+	#if EWMHTAGS_PATCH
+	updatecurrentdesktop();
+	#endif // EWMHTAGS_PATCH
 }
 
 void
@@ -2484,6 +2502,9 @@ toggleview(const Arg *arg)
 		focus(NULL);
 		arrange(selmon);
 	}
+	#if EWMHTAGS_PATCH
+	updatecurrentdesktop();
+	#endif // EWMHTAGS_PATCH
 }
 
 void
@@ -2858,6 +2879,9 @@ view(const Arg *arg)
 	#endif // PERTAG_PATCH
 	focus(NULL);
 	arrange(selmon);
+	#if EWMHTAGS_PATCH
+	updatecurrentdesktop();
+	#endif // EWMHTAGS_PATCH
 }
 
 Client *

patch/ewmhtags.c

@@ -0,0 +1,40 @@
+void
+setcurrentdesktop(void)
+{
+	long data[] = { 0 };
+	XChangeProperty(dpy, root, netatom[NetCurrentDesktop], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
+}
+
+void
+setdesktopnames(void)
+{
+	XTextProperty text;
+	Xutf8TextListToTextProperty(dpy, tags, TAGSLENGTH, XUTF8StringStyle, &text);
+	XSetTextProperty(dpy, root, &text, netatom[NetDesktopNames]);
+}
+
+void
+setnumdesktops(void)
+{
+	long data[] = { TAGSLENGTH };
+	XChangeProperty(dpy, root, netatom[NetNumberOfDesktops], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
+}
+
+void
+setviewport(void)
+{
+	long data[] = { 0, 0 };
+	XChangeProperty(dpy, root, netatom[NetDesktopViewport], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 2);
+}
+
+void
+updatecurrentdesktop(void)
+{
+	long rawdata[] = { selmon->tagset[selmon->seltags] };
+	int i = 0;
+	while (*rawdata >> (i + 1)) {
+		i++;
+	}
+	long data[] = { i };
+	XChangeProperty(dpy, root, netatom[NetCurrentDesktop], XA_CARDINAL, 32, PropModeReplace, (unsigned char *)data, 1);
+}

patch/ewmhtags.h

@@ -0,0 +1,7 @@
+#define TAGSLENGTH (LENGTH(tags))
+
+static void setcurrentdesktop(void);
+static void setdesktopnames(void);
+static void setnumdesktops(void);
+static void setviewport(void);
+static void updatecurrentdesktop(void);

patch/include.c

@@ -32,6 +32,10 @@
 #include "cyclelayouts.c"
 #endif
 
+#if EWMHTAGS_PATCH
+#include "ewmhtags.c"
+#endif
+
 #if PERTAG_PATCH
 #include "pertag.c"
 #endif

patch/include.h

@@ -32,6 +32,10 @@
 #include "cyclelayouts.h"
 #endif
 
+#if EWMHTAGS_PATCH
+#include "ewmhtags.h"
+#endif
+
 #if ROTATESTACK_PATCH
 #include "rotatestack.h"
 #endif

patches.h

@@ -85,6 +85,13 @@
  */
 #define CYCLELAYOUTS_PATCH 0
 
+/* Adds EWMH support for _NET_NUMBER_OF_DESKTOPS, _NET_CURRENT_DESKTOP, _NET_DESKTOP_NAMES
+ * and _NET_DESKTOP_VIEWPORT, which allows for compatibility with other bars and programs
+ * that request workspace information. For example polybar's xworkspaces module.
+ * https://dwm.suckless.org/patches/ewmhtags/
+ */
+#define EWMHTAGS_PATCH 0
+
 /* This patch shows the titles of all visible windows in the status bar
  * (as opposed to showing only the selected one).
  * Awesomebar takes precedence over fancybar.