Implement urgency base functionality

Introduces a command to manually set urgency, as well as rendering of
urgent views, sending the IPC event, removing urgency after focused for
one second, and matching urgent views via criteria.

sway/commands.c

@@ -153,6 +153,7 @@ static struct cmd_handler command_handlers[] = {
 	{ "swap", cmd_swap },
 	{ "title_format", cmd_title_format },
 	{ "unmark", cmd_unmark },
+	{ "urgent", cmd_urgent },
 };
 
 static int handler_compare(const void *_a, const void *_b) {

sway/commands/urgent.c

@@ -0,0 +1,36 @@
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/tree/arrange.h"
+#include "sway/tree/container.h"
+#include "sway/tree/view.h"
+#include "sway/tree/layout.h"
+
+struct cmd_results *cmd_urgent(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "urgent", EXPECTED_EQUAL_TO, 1))) {
+		return error;
+	}
+	struct sway_container *container =
+		config->handler_context.current_container;
+	if (container->type != C_VIEW) {
+		return cmd_results_new(CMD_INVALID, "urgent",
+				"Only views can be urgent");
+	}
+	struct sway_view *view = container->sway_view;
+
+	if (strcmp(argv[0], "enable") == 0) {
+		view_set_urgent(view, true);
+	} else if (strcmp(argv[0], "disable") == 0) {
+		view_set_urgent(view, false);
+	} else if (strcmp(argv[0], "allow") == 0) {
+		view->allow_request_urgent = true;
+	} else if (strcmp(argv[0], "deny") == 0) {
+		view->allow_request_urgent = false;
+	} else {
+		return cmd_results_new(CMD_INVALID, "urgent",
+				"Expected 'urgent <enable|disable|allow|deny>'");
+	}
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}

sway/criteria.c

@@ -46,6 +46,31 @@ static int regex_cmp(const char *item, const pcre *regex) {
 	return pcre_exec(regex, NULL, item, strlen(item), 0, 0, NULL, 0);
 }
 
+static int cmp_urgent(const void *_a, const void *_b) {
+	struct sway_view *a = *(void **)_a;
+	struct sway_view *b = *(void **)_b;
+
+	if (a->urgent.tv_sec < b->urgent.tv_sec) {
+		return -1;
+	} else if (a->urgent.tv_sec > b->urgent.tv_sec) {
+		return 1;
+	}
+	if (a->urgent.tv_nsec < b->urgent.tv_nsec) {
+		return -1;
+	} else if (a->urgent.tv_nsec > b->urgent.tv_nsec) {
+		return 1;
+	}
+	return 0;
+}
+
+static void find_urgent_iterator(struct sway_container *swayc, void *data) {
+	if (swayc->type != C_VIEW || !view_is_urgent(swayc->sway_view)) {
+		return;
+	}
+	list_t *urgent_views = data;
+	list_add(urgent_views, swayc->sway_view);
+}
+
 static bool criteria_matches_view(struct criteria *criteria,
 		struct sway_view *view) {
 	if (criteria->title) {
@@ -133,8 +158,23 @@ static bool criteria_matches_view(struct criteria *criteria,
 	}
 
 	if (criteria->urgent) {
-		// TODO
-		return false;
+		if (!view_is_urgent(view)) {
+			return false;
+		}
+		list_t *urgent_views = create_list();
+		container_for_each_descendant_dfs(&root_container,
+				find_urgent_iterator, urgent_views);
+		list_stable_sort(urgent_views, cmp_urgent);
+		struct sway_view *target;
+		if (criteria->urgent == 'o') { // oldest
+			target = urgent_views->items[0];
+		} else { // latest
+			target = urgent_views->items[urgent_views->length - 1];
+		}
+		list_free(urgent_views);
+		if (view != target) {
+			return false;
+		}
 	}
 
 	if (criteria->workspace) {

sway/desktop/render.c

@@ -553,7 +553,11 @@ static void render_container_simple(struct sway_output *output,
 			struct wlr_texture *marks_texture;
 			struct sway_container_state *state = &child->current;
 
-			if (state->focused || parent_focused) {
+			if (view_is_urgent(view)) {
+				colors = &config->border_colors.urgent;
+				title_texture = child->title_urgent;
+				marks_texture = view->marks_urgent;
+			} else if (state->focused || parent_focused) {
 				colors = &config->border_colors.focused;
 				title_texture = child->title_focused;
 				marks_texture = view->marks_focused;
@@ -608,7 +612,11 @@ static void render_container_tabbed(struct sway_output *output,
 		struct wlr_texture *title_texture;
 		struct wlr_texture *marks_texture;
 
-		if (cstate->focused || parent_focused) {
+		if (view && view_is_urgent(view)) {
+			colors = &config->border_colors.urgent;
+			title_texture = child->title_urgent;
+			marks_texture = view->marks_urgent;
+		} else if (cstate->focused || parent_focused) {
 			colors = &config->border_colors.focused;
 			title_texture = child->title_focused;
 			marks_texture = view ? view->marks_focused : NULL;
@@ -671,7 +679,11 @@ static void render_container_stacked(struct sway_output *output,
 		struct wlr_texture *title_texture;
 		struct wlr_texture *marks_texture;
 
-		if (cstate->focused || parent_focused) {
+		if (view && view_is_urgent(view)) {
+			colors = &config->border_colors.urgent;
+			title_texture = child->title_urgent;
+			marks_texture = view->marks_urgent;
+		} else if (cstate->focused || parent_focused) {
 			colors = &config->border_colors.focused;
 			title_texture = child->title_focused;
 			marks_texture = view ? view->marks_focused : NULL;
@@ -731,7 +743,11 @@ static void render_floating_container(struct sway_output *soutput,
 		struct wlr_texture *title_texture;
 		struct wlr_texture *marks_texture;
 
-		if (con->current.focused) {
+		if (view_is_urgent(view)) {
+			colors = &config->border_colors.urgent;
+			title_texture = con->title_urgent;
+			marks_texture = view->marks_urgent;
+		} else if (con->current.focused) {
 			colors = &config->border_colors.focused;
 			title_texture = con->title_focused;
 			marks_texture = view->marks_focused;

sway/input/seat.c

@@ -594,6 +594,12 @@ static void seat_send_unfocus(struct sway_container *container,
 	}
 }
 
+static int handle_urgent_timeout(void *data) {
+	struct sway_view *view = data;
+	view_set_urgent(view, false);
+	return 0;
+}
+
 void seat_set_focus_warp(struct sway_seat *seat,
 		struct sway_container *container, bool warp) {
 	if (seat->focused_layer) {
@@ -670,6 +676,16 @@ void seat_set_focus_warp(struct sway_seat *seat,
 		}
 	}
 
+	// If urgent, start a timer to unset it
+	if (container && container->type == C_VIEW &&
+			view_is_urgent(container->sway_view) &&
+			!container->sway_view->urgent_timer) {
+		struct sway_view *view = container->sway_view;
+		view->urgent_timer = wl_event_loop_add_timer(server.wl_event_loop,
+				handle_urgent_timeout, view);
+		wl_event_source_timer_update(view->urgent_timer, 1000);
+	}
+
 	// If we've focused a floating container, bring it to the front.
 	// We do this by putting it at the end of the floating list.
 	// This must happen for both the pending and current children lists.

sway/ipc-json.c

@@ -170,7 +170,8 @@ static void ipc_json_describe_workspace(struct sway_container *workspace,
 	json_object_object_add(object, "output", workspace->parent ?
 			json_object_new_string(workspace->parent->name) : NULL);
 	json_object_object_add(object, "type", json_object_new_string("workspace"));
-	json_object_object_add(object, "urgent", json_object_new_boolean(false));
+	json_object_object_add(object, "urgent",
+			json_object_new_boolean(workspace_is_urgent(workspace)));
 	json_object_object_add(object, "representation", workspace->formatted_title ?
 			json_object_new_string(workspace->formatted_title) : NULL);
 

sway/meson.build

@@ -76,6 +76,7 @@ sway_sources = files(
 	'commands/swap.c',
 	'commands/title_format.c',
 	'commands/unmark.c',
+	'commands/urgent.c',
 	'commands/workspace.c',
 	'commands/workspace_layout.c',
 	'commands/ws_auto_back_and_forth.c',

sway/tree/view.c

@@ -25,6 +25,7 @@ void view_init(struct sway_view *view, enum sway_view_type type,
 	view->impl = impl;
 	view->executed_criteria = create_list();
 	view->marks = create_list();
+	view->allow_request_urgent = true;
 	wl_signal_init(&view->events.unmap);
 }
 
@@ -589,6 +590,11 @@ void view_unmap(struct sway_view *view) {
 	wl_list_remove(&view->surface_new_subsurface.link);
 	wl_list_remove(&view->container_reparent.link);
 
+	if (view->urgent_timer) {
+		wl_event_source_remove(view->urgent_timer);
+		view->urgent_timer = NULL;
+	}
+
 	if (view->is_fullscreen) {
 		struct sway_container *ws = container_parent(view->swayc, C_WORKSPACE);
 		ws->sway_workspace->fullscreen = NULL;
@@ -1047,3 +1053,27 @@ bool view_is_visible(struct sway_view *view) {
 	}
 	return true;
 }
+
+void view_set_urgent(struct sway_view *view, bool enable) {
+	if (enable) {
+		struct sway_seat *seat = input_manager_current_seat(input_manager);
+		if (seat_get_focus(seat) == view->swayc) {
+			return;
+		}
+		clock_gettime(CLOCK_MONOTONIC, &view->urgent);
+	} else {
+		view->urgent = (struct timespec){ 0 };
+		if (view->urgent_timer) {
+			wl_event_source_remove(view->urgent_timer);
+			view->urgent_timer = NULL;
+		}
+	}
+	container_damage_whole(view->swayc);
+
+	struct sway_container *ws = container_parent(view->swayc, C_WORKSPACE);
+	ipc_event_workspace(ws, NULL, "urgent");
+}
+
+bool view_is_urgent(struct sway_view *view) {
+	return view->urgent.tv_sec || view->urgent.tv_nsec;
+}

sway/tree/workspace.c

@@ -11,6 +11,7 @@
 #include "sway/ipc-server.h"
 #include "sway/tree/arrange.h"
 #include "sway/tree/container.h"
+#include "sway/tree/view.h"
 #include "sway/tree/workspace.h"
 #include "list.h"
 #include "log.h"
@@ -518,3 +519,12 @@ struct sway_container *workspace_output_get_highest_available(
 
 	return NULL;
 }
+
+static bool find_urgent_iterator(struct sway_container *con,
+		void *data) {
+	return con->type == C_VIEW && view_is_urgent(con->sway_view);
+}
+
+bool workspace_is_urgent(struct sway_container *workspace) {
+	return container_find(workspace, find_urgent_iterator, NULL);
+}