Implement default_floating_border command and adjust CSD behaviour

include/sway/tree/view.h

@@ -69,6 +69,7 @@ struct sway_view {
 	bool border_bottom;
 	bool border_left;
 	bool border_right;
+	bool using_csd;
 
 	struct timespec urgent;
 	bool allow_request_urgent;

sway/commands.c

@@ -98,6 +98,7 @@ static struct cmd_handler handlers[] = {
 	{ "client.unfocused", cmd_client_unfocused },
 	{ "client.urgent", cmd_client_urgent },
 	{ "default_border", cmd_default_border },
+	{ "default_floating_border", cmd_default_floating_border },
 	{ "exec", cmd_exec },
 	{ "exec_always", cmd_exec_always },
 	{ "floating_maximum_size", cmd_floating_maximum_size },

sway/commands/default_floating_border.c

@@ -0,0 +1,29 @@
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/tree/container.h"
+
+struct cmd_results *cmd_default_floating_border(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "default_floating_border",
+					EXPECTED_AT_LEAST, 1))) {
+		return error;
+	}
+
+	if (strcmp(argv[0], "none") == 0) {
+		config->floating_border = B_NONE;
+	} else if (strcmp(argv[0], "normal") == 0) {
+		config->floating_border = B_NORMAL;
+	} else if (strcmp(argv[0], "pixel") == 0) {
+		config->floating_border = B_PIXEL;
+	} else {
+		return cmd_results_new(CMD_INVALID, "default_floating_border",
+				"Expected 'default_floating_border <none|normal|pixel>' "
+				"or 'default_floating_border <normal|pixel> <px>'");
+	}
+	if (argc == 2) {
+		config->floating_border_thickness = atoi(argv[1]);
+	}
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}

sway/desktop/render.c

@@ -256,6 +256,10 @@ static void render_view(struct sway_output *output, pixman_region32_t *damage,
 		render_view_surfaces(view, output, damage, view->swayc->alpha);
 	}
 
+	if (view->using_csd) {
+		return;
+	}
+
 	struct wlr_box box;
 	float output_scale = output->wlr_output->scale;
 	float color[4];
@@ -571,12 +575,14 @@ static void render_container_simple(struct sway_output *output,
 				marks_texture = view->marks_unfocused;
 			}
 
-			if (state->border == B_NORMAL) {
-				render_titlebar(output, damage, child, state->swayc_x,
-						state->swayc_y, state->swayc_width, colors,
-						title_texture, marks_texture);
-			} else {
-				render_top_border(output, damage, child, colors);
+			if (!view->using_csd) {
+				if (state->border == B_NORMAL) {
+					render_titlebar(output, damage, child, state->swayc_x,
+							state->swayc_y, state->swayc_width, colors,
+							title_texture, marks_texture);
+				} else {
+					render_top_border(output, damage, child, colors);
+				}
 			}
 			render_view(output, damage, child, colors);
 		} else {
@@ -761,12 +767,14 @@ static void render_floating_container(struct sway_output *soutput,
 			marks_texture = view->marks_unfocused;
 		}
 
-		if (con->current.border == B_NORMAL) {
-			render_titlebar(soutput, damage, con, con->current.swayc_x,
-					con->current.swayc_y, con->current.swayc_width, colors,
-					title_texture, marks_texture);
-		} else if (con->current.border != B_NONE) {
-			render_top_border(soutput, damage, con, colors);
+		if (!view->using_csd) {
+			if (con->current.border == B_NORMAL) {
+				render_titlebar(soutput, damage, con, con->current.swayc_x,
+						con->current.swayc_y, con->current.swayc_width, colors,
+						title_texture, marks_texture);
+			} else if (con->current.border != B_NONE) {
+				render_top_border(soutput, damage, con, colors);
+			}
 		}
 		render_view(soutput, damage, con, colors);
 	} else {

sway/meson.build

@@ -35,6 +35,7 @@ sway_sources = files(
 	'commands/border.c',
 	'commands/client.c',
 	'commands/default_border.c',
+	'commands/default_floating_border.c',
 	'commands/default_orientation.c',
 	'commands/exit.c',
 	'commands/exec.c',

sway/tree/container.c

@@ -967,9 +967,14 @@ void container_set_geometry_from_floating_view(struct sway_container *con) {
 		return;
 	}
 	struct sway_view *view = con->sway_view;
-	size_t border_width = view->border_thickness * (view->border != B_NONE);
-	size_t top =
-		view->border == B_NORMAL ? container_titlebar_height() : border_width;
+	size_t border_width = 0;
+	size_t top = 0;
+
+	if (!view->using_csd) {
+		border_width = view->border_thickness * (view->border != B_NONE);
+		top = view->border == B_NORMAL ?
+			container_titlebar_height() : border_width;
+	}
 
 	con->x = view->x - border_width;
 	con->y = view->y - top;

sway/tree/view.c

@@ -316,11 +316,15 @@ void view_set_activated(struct sway_view *view, bool activated) {
 }
 
 void view_set_tiled(struct sway_view *view, bool tiled) {
-	bool csd = true;
-	if (view->impl->has_client_side_decorations) {
-		csd = view->impl->has_client_side_decorations(view);
+	if (!tiled) {
+		view->using_csd = true;
+		if (view->impl->has_client_side_decorations) {
+			view->using_csd = view->impl->has_client_side_decorations(view);
+		}
+	} else {
+		view->using_csd = false;
 	}
-	view->border = tiled || !csd ? config->border : B_NONE;
+
 	if (view->impl->set_tiled) {
 		view->impl->set_tiled(view, tiled);
 	}
@@ -573,8 +577,6 @@ void view_map(struct sway_view *view, struct wlr_surface *wlr_surface) {
 
 	view->surface = wlr_surface;
 	view->swayc = cont;
-	view->border = config->border;
-	view->border_thickness = config->border_thickness;
 
 	view_init_subsurfaces(view, wlr_surface);
 	wl_signal_add(&wlr_surface->events.new_subsurface,
@@ -585,8 +587,12 @@ void view_map(struct sway_view *view, struct wlr_surface *wlr_surface) {
 	view->container_reparent.notify = view_handle_container_reparent;
 
 	if (view->impl->wants_floating && view->impl->wants_floating(view)) {
+		view->border = config->floating_border;
+		view->border_thickness = config->floating_border_thickness;
 		container_set_floating(view->swayc, true);
 	} else {
+		view->border = config->border;
+		view->border_thickness = config->border_thickness;
 		view_set_tiled(view, true);
 	}