Keep track of the dwm program title

1 files changed, 42 insertions, 4 deletions

diff --git a/src/dwm.c b/src/dwm.c
index f323164..e8162eb 100644
--- a/src/dwm.c
+++ b/src/dwm.c
@@ -22,8 +22,12 @@ struct DwmIpc {
     GSource *source;
     State *state;
     Color color;
+    Color text_color;
     Color selected;
     Button *tags[9];
+    Button *title;
+    bool change_title;
+    bool hidden_title;
 };
 
 typedef enum {
@@ -170,7 +174,7 @@ static void ipc_handle(DwmIpc *dwm, DwmIpcMessage type, char *reply, uint32_t re
 
     if (type == IPC_TYPE_EVENT) {
         if (json_reader_read_member(reader, IPC_EVENT_TAG_CHANGE)) {
-            log_debug("Reading dwm ipc event [event=%s]", IPC_EVENT_TAG_CHANGE);
+            log_debug("Handling dwm ipc event [event=%s]", IPC_EVENT_TAG_CHANGE);
 
             json_reader_read_member(reader, "new_state");
             json_reader_read_member(reader, "selected");
@@ -188,9 +192,17 @@ static void ipc_handle(DwmIpc *dwm, DwmIpcMessage type, char *reply, uint32_t re
                 state_redraw(dwm->state, false);
             }
         } else if (JSON_FIELD(reader, IPC_EVENT_CLIENT_FOCUS_CHANGE)) {
-            log_debug("Ignoring dwm ipc event [event=%s]", IPC_EVENT_CLIENT_FOCUS_CHANGE);
-            // TODO
+            log_debug("Handling dwm ipc event [event=%s]", IPC_EVENT_CLIENT_FOCUS_CHANGE);
 
+            json_reader_read_member(reader, "new_win_id");
+            long win_id = json_reader_get_int_value(reader);
+            json_reader_end_member(reader);
+            json_reader_end_member(reader);
+
+            char *msg = g_strdup_printf("{ \"client_window_id\": %ld }\n", win_id);
+            dwm->change_title = true;
+            ipc_send(dwm, IPC_TYPE_GET_DWM_CLIENT, msg, strlen(msg));
+            g_free(msg);
         } else if (JSON_FIELD(reader, IPC_EVENT_LAYOUT_CHANGE)) {
             log_debug("Ignoring dwm ipc event [event=%s]", IPC_EVENT_LAYOUT_CHANGE);
             // TODO
@@ -214,6 +226,29 @@ static void ipc_handle(DwmIpc *dwm, DwmIpcMessage type, char *reply, uint32_t re
 
             log_warning("Unrecognized dwm ipc event: %s", event);
         }
+    } else if (type == IPC_TYPE_GET_DWM_CLIENT) {
+        log_debug("Received dwm client information message [type=%d]", type);
+
+        if (dwm->change_title) {
+            json_reader_read_member(reader, "name");
+            const char *title = json_reader_get_string_value(reader);
+
+            log_debug("Changing current program title: %s", title ? title : "?");
+            if (title == NULL || strlen(title) == 0) {
+                state_remove_button(dwm->state, dwm->title);
+                dwm->hidden_title = true;
+            } else {
+                button_simple_set_text(dwm->title, g_strdup(title), dwm->text_color);
+                if (dwm->hidden_title) {
+                    state_add_button(dwm->state, dwm->title);
+                    dwm->hidden_title = false;
+                }
+            }
+
+            dwm->change_title = false;
+            state_redraw(dwm->state, true);
+            json_reader_end_member(reader);
+        }
     } else {
         log_debug("Ignoring dwm ipc message [type=%d]", type);
         //log_debug("%s", reply);
@@ -273,7 +308,6 @@ DwmIpc *dwm_create(State *state, const char *socket)
 {
     DwmIpc *dwm = g_malloc0(sizeof(DwmIpc));
     dwm->state = state;
-    dwm->tags[0] = NULL;
 
     GError *error = NULL;
     dwm->socket = g_socket_new(G_SOCKET_FAMILY_UNIX, G_SOCKET_TYPE_STREAM, 0, &error);
@@ -326,6 +360,7 @@ static void change_tag_action(Button *btn)
 void dwm_register_tags(DwmIpc *dwm, Color color, Color selected, Color text_color, Color line_color)
 {
     dwm->color = color;
+    dwm->text_color = text_color;
     dwm->selected = selected;
 
     // Tags button
@@ -336,6 +371,9 @@ void dwm_register_tags(DwmIpc *dwm, Color color, Color selected, Color text_colo
         button_simple_set_action(dwm->tags[i], change_tag_action, dwm);
         state_add_button(dwm->state, dwm->tags[i]);
     }
+
+    dwm->title = button_simple_create(PANGO_ALIGN_CENTER, color, line_color);
+    dwm->hidden_title = true;
 }
 
 void dwm_destroy(DwmIpc *dwm)