replicate dwm behavior for snap resize

Makefile

@@ -20,7 +20,6 @@ all: dwl
 dwl: dwl.o util.o
 	$(CC) dwl.o util.o $(DWLCFLAGS) $(LDFLAGS) $(LDLIBS) -o $@
 dwl.o: dwl.c client.h config.h config.mk cursor-shape-v1-protocol.h \
-	ext-image-copy-capture-v1-protocol.h \
 	pointer-constraints-unstable-v1-protocol.h wlr-layer-shell-unstable-v1-protocol.h \
 	wlr-output-power-management-unstable-v1-protocol.h xdg-shell-protocol.h
 util.o: util.c util.h
@@ -34,9 +33,6 @@ WAYLAND_PROTOCOLS = `$(PKG_CONFIG) --variable=pkgdatadir wayland-protocols`
 cursor-shape-v1-protocol.h:
 	$(WAYLAND_SCANNER) enum-header \
 		$(WAYLAND_PROTOCOLS)/staging/cursor-shape/cursor-shape-v1.xml $@
-ext-image-copy-capture-v1-protocol.h:
-	$(WAYLAND_SCANNER) enum-header \
-		$(WAYLAND_PROTOCOLS)/staging/ext-image-copy-capture/ext-image-copy-capture-v1.xml $@
 pointer-constraints-unstable-v1-protocol.h:
 	$(WAYLAND_SCANNER) enum-header \
 		$(WAYLAND_PROTOCOLS)/unstable/pointer-constraints/pointer-constraints-unstable-v1.xml $@

README.md

@@ -1,8 +1,7 @@
 # dwl - dwm for Wayland
 
-Join us on our [Discord server]  
-Or Matrix: [#dwl-official:matrix.org]  
-Or on our IRC channel: [#dwl on Libera Chat]
+Join us on our IRC channel: [#dwl on Libera Chat]  
+Or on the community-maintained [Discord server].
 
 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,
@@ -24,14 +23,12 @@ with each release on the [release] page
 
 ### Development branch [main]
 Active development progresses on the `main` branch. The `main` branch is built
-against the latest release of [wlroots]. PRs should target this branch unless they
-depend on functionality that is not in the current release of `wlroots`.
-
-### Preview branch [wlroots-next]
-The `wlroots-next` branch is built against the git version of [wlroots], which
-is unstable and changes frequently. PRs requiring functionality from the git
-version of `wlroots` should target this branch.
-
+against a late (and often changing) git commit of wlroots. While the adventurous
+are welcome to use `main`, it is a rocky road. Using `main` requires that the
+user be willing to chase git commits of wlroots. Testing development pull
+requests may involve merging unmerged pull requests in [wlroots]' git repository
+and/or git commits of wayland.
+  
 ### Building dwl
 dwl has the following dependencies:
 - libinput
@@ -205,7 +202,6 @@ inspiration, and to the various contributors to the project, including:
 [dwl-patches]: https://codeberg.org/dwl/dwl-patches
 [list of useful resources on our wiki]: https://codeberg.org/dwl/dwl/wiki/Home#migrating-from-x
 [main]: https://codeberg.org/dwl/dwl/src/branch/main
-[wlroots-next]: https://codeberg.org/dwl/dwl/src/branch/wlroots-next
 [release]: https://codeberg.org/dwl/dwl/releases
 [runit]: http://smarden.org/runit/faq.html#userservices
 [s6]: https://skarnet.org/software/s6/
@@ -213,4 +209,3 @@ 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

@@ -7,6 +7,7 @@
 static const int sloppyfocus               = 1;  /* focus follows mouse */
 static const int bypass_surface_visibility = 0;  /* 1 means idle inhibitors will disable idle tracking even if it's surface isn't visible  */
 static const unsigned int borderpx         = 1;  /* border pixel of windows */
+static const unsigned int snap             = 32; /* snap pixel */
 static const float rootcolor[]             = COLOR(0x222222ff);
 static const float bordercolor[]           = COLOR(0x444444ff);
 static const float focuscolor[]            = COLOR(0x005577ff);

config.mk

@@ -1,4 +1,4 @@
-_VERSION = 0.9-dev
+_VERSION = 0.8-dev
 VERSION  = `git describe --tags --dirty 2>/dev/null || echo $(_VERSION)`
 
 PKG_CONFIG = pkg-config
@@ -8,8 +8,8 @@ PREFIX = /usr/local
 MANDIR = $(PREFIX)/share/man
 DATADIR = $(PREFIX)/share
 
-WLR_INCS = `$(PKG_CONFIG) --cflags wlroots-0.20`
-WLR_LIBS = `$(PKG_CONFIG) --libs wlroots-0.20`
+WLR_INCS = `$(PKG_CONFIG) --cflags wlroots-0.19`
+WLR_LIBS = `$(PKG_CONFIG) --libs wlroots-0.19`
 
 # Allow using an alternative wlroots installation
 # This has to have all the includes required by wlroots, e.g:

dwl.c

@@ -25,8 +25,6 @@
 #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_ext_image_capture_source_v1.h>
-#include <wlr/types/wlr_ext_image_copy_capture_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>
@@ -71,7 +69,6 @@
 #include <xcb/xcb_icccm.h>
 #endif
 
-#include "xdg-shell-protocol.h"
 #include "util.h"
 
 /* macros */
@@ -589,7 +586,7 @@ arrangelayers(Monitor *m)
 		arrange(m);
 	}
 
-	/* Arrange non-exclusive surfaces from top->bottom */
+	/* Arrange non-exlusive surfaces from top->bottom */
 	for (i = 3; i >= 0; i--)
 		arrangelayer(m, &m->layers[i], &usable_area, 0);
 
@@ -1866,6 +1863,7 @@ void
 motionnotify(uint32_t time, struct wlr_input_device *device, double dx, double dy,
 		double dx_unaccel, double dy_unaccel)
 {
+	int nx, ny;
 	double sx = 0, sy = 0, sx_confined, sy_confined;
 	Client *c = NULL, *w = NULL;
 	LayerSurface *l = NULL;
@@ -1923,7 +1921,17 @@ motionnotify(uint32_t time, struct wlr_input_device *device, double dx, double d
 	/* If we are currently grabbing the mouse, handle and return */
 	if (cursor_mode == CurMove) {
 		/* Move the grabbed client to the new position. */
-		resize(grabc, (struct wlr_box){.x = (int)round(cursor->x) - grabcx, .y = (int)round(cursor->y) - grabcy,
+		nx = (int)round(cursor->x) - grabcx;
+		ny = (int)round(cursor->y) - grabcy;
+		if (abs(selmon->w.x - nx) < (int)snap)
+			nx = selmon->w.x;
+		else if (abs((selmon->w.x + selmon->w.width) - (nx + grabc->geom.width)) < (int)snap)
+			nx = selmon->w.x + selmon->w.width - grabc->geom.width;
+		if (abs(selmon->w.y - ny) < (int)snap)
+			ny = selmon->w.y;
+		else if (abs((selmon->w.y + selmon->w.height) - (ny + grabc->geom.height)) < (int)snap)
+			ny = selmon->w.y + selmon->w.height - grabc->geom.height;
+		resize(grabc, (struct wlr_box){.x = nx, .y = ny,
 			.width = grabc->geom.width, .height = grabc->geom.height}, 1);
 		return;
 	} else if (cursor_mode == CurResize) {
@@ -2137,7 +2145,7 @@ powermgrsetmode(struct wl_listener *listener, void *data)
 	if (!m)
 		return;
 
-	m->gamma_lut_changed = 1; /* Reapply gamma LUT when re-enabling the output */
+	m->gamma_lut_changed = 1; /* Reapply gamma LUT when re-enabling the ouput */
 	wlr_output_state_set_enabled(&state, event->mode);
 	wlr_output_commit_state(m->wlr_output, &state);
 
@@ -2459,7 +2467,7 @@ setup(void)
 	wlr_log_init(log_level, NULL);
 
 	/* The Wayland display is managed by libwayland. It handles accepting
-	 * clients from the Unix socket, managing Wayland globals, and so on. */
+	 * clients from the Unix socket, manging Wayland globals, and so on. */
 	dpy = wl_display_create();
 	event_loop = wl_display_get_event_loop(dpy);
 
@@ -2521,8 +2529,6 @@ setup(void)
 	wlr_data_device_manager_create(dpy);
 	wlr_export_dmabuf_manager_v1_create(dpy);
 	wlr_screencopy_manager_v1_create(dpy);
-	wlr_ext_image_copy_capture_manager_v1_create(dpy, 1);
-	wlr_ext_output_image_capture_source_manager_v1_create(dpy, 1);
 	wlr_data_control_manager_v1_create(dpy);
 	wlr_ext_data_control_manager_v1_create(dpy, 1);
 	wlr_primary_selection_v1_device_manager_create(dpy);
@@ -3183,7 +3189,9 @@ xwaylandready(struct wl_listener *listener, void *data)
 
 	/* Set the default XWayland cursor to match the rest of dwl. */
 	if ((xcursor = wlr_xcursor_manager_get_xcursor(cursor_mgr, "default", 1)))
-		wlr_xwayland_set_cursor(xwayland, wlr_xcursor_image_get_buffer(xcursor->images[0]),
+		wlr_xwayland_set_cursor(xwayland,
+				xcursor->images[0]->buffer, xcursor->images[0]->width * 4,
+				xcursor->images[0]->width, xcursor->images[0]->height,
 				xcursor->images[0]->hotspot_x, xcursor->images[0]->hotspot_y);
 }
 #endif