Re-implement support for the urgency hint, extend t/13-urgent.t

The actual rendering will follow

src/con.c

@@ -91,6 +91,10 @@ void con_focus(Con *con) {
         con_focus(con->parent);
 
     focused = con;
+    if (con->urgent) {
+        con->urgent = false;
+        workspace_update_urgent_flag(con_get_workspace(con));
+    }
 }
 
 /*

src/handlers.c

@@ -810,6 +810,7 @@ int handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_w
 
         return 1;
 }
+#endif
 
 /*
  * Handles the WM_HINTS property for extracting the urgency state of the window.
@@ -817,46 +818,49 @@ int handle_normal_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_w
  */
 int handle_hints(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,
                   xcb_atom_t name, xcb_get_property_reply_t *reply) {
-        Client *client = table_get(&by_child, window);
-        if (client == NULL) {
-                DLOG("Received WM_HINTS for unknown client\n");
-                return 1;
-        }
-        xcb_wm_hints_t hints;
-
-        if (reply != NULL) {
-                if (!xcb_get_wm_hints_from_reply(&hints, reply))
-                        return 1;
-        } else {
-                if (!xcb_get_wm_hints_reply(conn, xcb_get_wm_hints_unchecked(conn, client->child), &hints, NULL))
-                        return 1;
-        }
-
-        Client *last_focused = SLIST_FIRST(&(c_ws->focus_stack));
-        if (!client->urgent && client == last_focused) {
-                DLOG("Ignoring urgency flag for current client\n");
-                return 1;
-        }
-
-        /* Update the flag on the client directly */
-        client->urgent = (xcb_wm_hints_get_urgency(&hints) != 0);
-        CLIENT_LOG(client);
-        LOG("Urgency flag changed to %d\n", client->urgent);
-
-        workspace_update_urgent_flag(client->workspace);
-        redecorate_window(conn, client);
-
-        /* If the workspace this client is on is not visible, we need to redraw
-         * the workspace bar */
-        if (!workspace_is_visible(client->workspace)) {
-                Output *output = client->workspace->output;
-                render_workspace(conn, output, output->current_workspace);
-                xcb_flush(conn);
-        }
-
+    Con *con = con_by_window_id(window);
+    if (con == NULL) {
+        DLOG("Received WM_HINTS for unknown client\n");
         return 1;
+    }
+
+    xcb_wm_hints_t hints;
+
+    if (reply != NULL) {
+        if (!xcb_get_wm_hints_from_reply(&hints, reply))
+            return 1;
+    } else {
+        if (!xcb_get_wm_hints_reply(conn, xcb_get_wm_hints_unchecked(conn, con->window->id), &hints, NULL))
+            return 1;
+    }
+
+    if (!con->urgent && focused == con) {
+        DLOG("Ignoring urgency flag for current client\n");
+        return 1;
+    }
+
+    /* Update the flag on the client directly */
+    con->urgent = (xcb_wm_hints_get_urgency(&hints) != 0);
+    //CLIENT_LOG(con);
+    LOG("Urgency flag changed to %d\n", con->urgent);
+
+    workspace_update_urgent_flag(con_get_workspace(con));
+
+#if 0
+    /* If the workspace this client is on is not visible, we need to redraw
+     * the workspace bar */
+    if (!workspace_is_visible(client->workspace)) {
+            Output *output = client->workspace->output;
+            render_workspace(conn, output, output->current_workspace);
+            xcb_flush(conn);
+    }
+#endif
+
+    return 1;
 }
 
+#if 0
+
 /*
  * Handles the transient for hints set by a window, signalizing that this window is a popup window
  * for some other window.

src/ipc.c

@@ -137,6 +137,9 @@ void dump_node(yajl_gen gen, struct Con *con, bool inplace_restart) {
         ystr("orientation");
         y(integer, con->orientation);
 
+        ystr("urgent");
+        y(integer, con->urgent);
+
         ystr("layout");
         y(integer, con->layout);
 

src/nc.c

@@ -2,6 +2,7 @@
  * vim:ts=4:sw=4:expandtab
  */
 #include <ev.h>
+#include <limits.h>
 #include "all.h"
 
 static int xkb_event_base;
@@ -254,6 +255,9 @@ int main(int argc, char *argv[]) {
     /* Watch _NET_WM_NAME (title of the window encoded in UTF-8) */
     xcb_property_set_handler(&prophs, atoms[_NET_WM_NAME], 128, handle_windowname_change, NULL);
 
+    /* Watch WM_HINTS (contains the urgent property) */
+    xcb_property_set_handler(&prophs, WM_HINTS, UINT_MAX, handle_hints, NULL);
+
     /* Watch WM_NAME (title of the window encoded in COMPOUND_TEXT) */
     xcb_watch_wm_name(&prophs, 128, handle_windowname_change_legacy, NULL);
 

src/workspace.c

@@ -429,31 +429,37 @@ void workspace_unmap_clients(xcb_connection_t *conn, Workspace *u_ws) {
 
         ignore_enter_notify_forall(conn, u_ws, false);
 }
+#endif
+
+static bool get_urgency_flag(Con *con) {
+    Con *child;
+    TAILQ_FOREACH(child, &(con->nodes_head), nodes)
+        if (child->urgent || get_urgency_flag(child))
+            return true;
+
+    TAILQ_FOREACH(child, &(con->floating_head), floating_windows)
+        if (child->urgent || get_urgency_flag(child))
+            return true;
+
+    return false;
+}
 
 /*
  * Goes through all clients on the given workspace and updates the workspace’s
  * urgent flag accordingly.
  *
  */
-void workspace_update_urgent_flag(Workspace *ws) {
-        Client *current;
-        bool old_flag = ws->urgent;
-        bool urgent = false;
+void workspace_update_urgent_flag(Con *ws) {
+    bool old_flag = ws->urgent;
+    ws->urgent = get_urgency_flag(ws);
+    DLOG("Workspace urgency flag changed from %d to %d\n", old_flag, ws->urgent);
 
-        SLIST_FOREACH(current, &(ws->focus_stack), focus_clients) {
-                if (!current->urgent)
-                        continue;
-
-                urgent = true;
-                break;
-        }
-
-        ws->urgent = urgent;
-
-        if (old_flag != urgent)
-                ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"urgent\"}");
+    if (old_flag != ws->urgent)
+        ipc_send_event("workspace", I3_IPC_EVENT_WORKSPACE, "{\"change\":\"urgent\"}");
 }
 
+#if 0
+
 /*
  * Returns the width of the workspace.
  *