Corrected README

Enables the protocol documented at
https://wayland.app/protocols/ext-data-control-v1

It is the upstreamed version of the old wlr_data_control.

It is used e.g. by mpv to read and write the clipboard.

README.md

@@ -1,12 +1,13 @@
 # dwl - dwm for Wayland
 
-Join us on our IRC channel: [#dwl on Libera Chat]  
-Or on the community-maintained [Discord server].
+Join us on our [Discord server]  
+Or Matrix: [#dwl-official:matrix.org]  
+Or on our IRC channel: [#dwl on Libera Chat]
 
 dwl is a compact, hackable compositor for [Wayland] based on [wlroots]. It is
-intended to fill the same space in the Wayland world that dwm does in X11,
+intended to fill the same space in the Wayland world that [dwm] does in X11,
 primarily in terms of functionality, and secondarily in terms of
-philosophy. Like dwm, dwl is:
+philosophy. Like [dwm], dwl is:
 
 - Easy to understand, hack on, and extend with patches
 - One C source file (or a very small number) configurable via `config.h`
@@ -55,11 +56,11 @@ To enable XWayland, you should uncomment its flags in `config.mk`.
 ## Configuration
 
 All configuration is done by editing `config.h` and recompiling, in the same
-manner as dwm. There is no way to separately restart the window manager in
+manner as [dwm]. There is no way to separately restart the window manager in
 Wayland without restarting the entire display server, so any changes will take
 effect the next time dwl is executed.
 
-As in the dwm community, we encourage users to share patches they have
+As in the [dwm] community, we encourage users to share patches they have
 created. Check out the [dwl-patches] repository!
 
 ## Running dwl
@@ -118,17 +119,26 @@ script with the line
 
 To get a list of status bars that work with dwl consult our [wiki].
 
+### (Known) Java nonreparenting WM issue
+Certain IDEs don't display correctly unless an environmental variable for Java AWT
+indicates that the WM is nonreparenting.
+
+For some Java AWT-based IDEs, such as Xilinx Vivado and Microchip MPLAB X, the
+following environment variable needs to be set before running the IDE or dwl:
+
+    export _JAVA_AWT_WM_NONREPARENTING=1
+
 ## Replacements for X applications
 
 You can find a [list of useful resources on our wiki].
 
 ## Background
 
-dwl is not meant to provide every feature under the sun. Instead, like dwm, it
+dwl is not meant to provide every feature under the sun. Instead, like [dwm], it
 sticks to features which are necessary, simple, and straightforward to implement
 given the base on which it is built. Implemented default features are:
 
-- Any features provided by dwm/Xlib: simple window borders, tags, keybindings,
+- Any features provided by [dwm]/Xlib: simple window borders, tags, keybindings,
   client rules, mouse move/resize. Providing a built-in status bar is an
   exception to this goal, to avoid dependencies on font rendering and/or drawing
   libraries when an external bar could work well.
@@ -145,10 +155,10 @@ given the base on which it is built. Implemented default features are:
 - Layer shell popups (used by Waybar)
 - Damage tracking provided by scenegraph API
 
-Given the Wayland architecture, dwl has to implement features from dwm **and**
+Given the Wayland architecture, dwl has to implement features from [dwm] **and**
 the xorg-server. Because of this, it is impossible to maintain the original
 project goal of 2000 SLOC and have a reasonably complete compositor with
-features comparable to dwm. However, this does not mean that the code will grow
+features comparable to [dwm]. However, this does not mean that the code will grow
 indiscriminately. We will try to keep the code as small as possible.
 
 Features under consideration (possibly as patches) are:
@@ -172,7 +182,7 @@ developers. This was made possible in many cases by looking at how sway
 accomplished something, then trying to do the same in as suckless a way as
 possible.
 
-Many thanks to suckless.org and the dwm developers and community for the
+Many thanks to suckless.org and the [dwm] developers and community for the
 inspiration, and to the various contributors to the project, including:
 
 - **Devin J. Pohly for creating and nurturing the fledgling project**
@@ -183,6 +193,7 @@ inspiration, and to the various contributors to the project, including:
 
 
 [wlroots]: https://gitlab.freedesktop.org/wlroots
+[dwm]: https://dwm.suckless.org/
 [`systemd --user`]: https://wiki.archlinux.org/title/Systemd/User
 [#dwl on Libera Chat]: https://web.libera.chat/?channels=#dwl
 [0.7-rc1]: https://codeberg.org/dwl/dwl/releases/tag/v0.7-rc1
@@ -199,3 +210,4 @@ inspiration, and to the various contributors to the project, including:
 [wiki]: https://codeberg.org/dwl/dwl/wiki/Home#compatible-status-bars
 [Discord server]: https://discord.gg/jJxZnrGPWN
 [Wayland]: https://wayland.freedesktop.org/
+[#dwl-official:matrix.org]: https://matrix.to/#/#dwl-official:matrix.org

config.def.h

@@ -20,12 +20,11 @@ static const float fullscreen_bg[]         = {0.0f, 0.0f, 0.0f, 1.0f}; /* You ca
 /* logging */
 static int log_level = WLR_ERROR;
 
-/* NOTE: ALWAYS keep a rule declared even if you don't use rules (e.g leave at least one example) */
 static const Rule rules[] = {
 	/* app_id             title       tags mask     isfloating   monitor */
-	/* examples: */
 	{ "Gimp_EXAMPLE",     NULL,       0,            1,           -1 }, /* Start on currently visible tags floating, not tiled */
 	{ "firefox_EXAMPLE",  NULL,       1 << 8,       0,           -1 }, /* Start on ONLY tag "9" */
+    /* default/example rule: can be changed but cannot be eliminated; at least one rule must exist */
 };
 
 /* layout(s) */
@@ -38,17 +37,14 @@ static const Layout layouts[] = {
 
 /* monitors */
 /* (x=-1, y=-1) is reserved as an "autoconfigure" monitor position indicator
- * WARNING: negative values other than (-1, -1) cause problems with Xwayland clients
- * https://gitlab.freedesktop.org/xorg/xserver/-/issues/899
-*/
-/* NOTE: ALWAYS add a fallback rule, even if you are completely sure it won't be used */
+ * WARNING: negative values other than (-1, -1) cause problems with Xwayland clients due to
+ * https://gitlab.freedesktop.org/xorg/xserver/-/issues/899 */
 static const MonitorRule monrules[] = {
-	/* name       mfact  nmaster scale layout       rotate/reflect                x    y */
-	/* example of a HiDPI laptop monitor:
-	{ "eDP-1",    0.5f,  1,      2,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
-	*/
-	/* defaults */
+   /* name        mfact  nmaster scale layout       rotate/reflect                x    y
+    * example of a HiDPI laptop monitor:
+    { "eDP-1",    0.5f,  1,      2,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 }, */
 	{ NULL,       0.55f, 1,      1,    &layouts[0], WL_OUTPUT_TRANSFORM_NORMAL,   -1,  -1 },
+	/* default monitor rule: can be changed but cannot be eliminated; at least one monitor rule must exist */
 };
 
 /* keyboard */
@@ -123,7 +119,7 @@ static const char *termcmd[] = { "foot", NULL };
 static const char *menucmd[] = { "wmenu-run", NULL };
 
 static const Key keys[] = {
-	/* Note that Shift changes certain key codes: c -> C, 2 -> at, etc. */
+	/* Note that Shift changes certain key codes: 2 -> at, etc. */
 	/* modifier                  key                  function          argument */
 	{ MODKEY,                    XKB_KEY_p,           spawn,            {.v = menucmd} },
 	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Return,      spawn,            {.v = termcmd} },
@@ -135,7 +131,7 @@ static const Key keys[] = {
 	{ MODKEY,                    XKB_KEY_l,           setmfact,         {.f = +0.05f} },
 	{ MODKEY,                    XKB_KEY_Return,      zoom,             {0} },
 	{ MODKEY,                    XKB_KEY_Tab,         view,             {0} },
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_C,          killclient,     {0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_c,           killclient,       {0} },
 	{ MODKEY,                    XKB_KEY_t,           setlayout,        {.v = &layouts[0]} },
 	{ MODKEY,                    XKB_KEY_f,           setlayout,        {.v = &layouts[1]} },
 	{ MODKEY,                    XKB_KEY_m,           setlayout,        {.v = &layouts[2]} },
@@ -157,7 +153,7 @@ static const Key keys[] = {
 	TAGKEYS(          XKB_KEY_7, XKB_KEY_ampersand,                     6),
 	TAGKEYS(          XKB_KEY_8, XKB_KEY_asterisk,                      7),
 	TAGKEYS(          XKB_KEY_9, XKB_KEY_parenleft,                     8),
-	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_Q,          quit,           {0} },
+	{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_q,           quit,             {0} },
 
 	/* Ctrl-Alt-Backspace and Ctrl-Alt-Fx used to be handled by X server */
 	{ WLR_MODIFIER_CTRL|WLR_MODIFIER_ALT,XKB_KEY_Terminate_Server, quit, {0} },

dwl.c

@@ -24,6 +24,7 @@
 #include <wlr/types/wlr_data_device.h>
 #include <wlr/types/wlr_drm.h>
 #include <wlr/types/wlr_export_dmabuf_v1.h>
+#include <wlr/types/wlr_ext_data_control_v1.h>
 #include <wlr/types/wlr_fractional_scale_v1.h>
 #include <wlr/types/wlr_gamma_control_v1.h>
 #include <wlr/types/wlr_idle_inhibit_v1.h>
@@ -1616,7 +1617,8 @@ keybinding(uint32_t mods, xkb_keysym_t sym)
 	const Key *k;
 	for (k = keys; k < END(keys); k++) {
 		if (CLEANMASK(mods) == CLEANMASK(k->mod)
-				&& sym == k->keysym && k->func) {
+				&& xkb_keysym_to_lower(sym) == xkb_keysym_to_lower(k->keysym)
+				&& k->func) {
 			k->func(&k->arg);
 			return 1;
 		}
@@ -2517,6 +2519,7 @@ setup(void)
 	wlr_export_dmabuf_manager_v1_create(dpy);
 	wlr_screencopy_manager_v1_create(dpy);
 	wlr_data_control_manager_v1_create(dpy);
+	wlr_ext_data_control_manager_v1_create(dpy, 1);
 	wlr_primary_selection_v1_device_manager_create(dpy);
 	wlr_viewporter_create(dpy);
 	wlr_single_pixel_buffer_manager_v1_create(dpy);