swaybar: log invalid i3bar json

1 files changed, 12 insertions, 3 deletions

diff --git a/swaybar/i3bar.c b/swaybar/i3bar.c
index 02b68a2a..325aa61a 100644
--- a/swaybar/i3bar.c
+++ b/swaybar/i3bar.c
@@ -117,7 +117,9 @@ bool i3bar_handle_readable(struct status_line *status) {
                                 memmove(status->buffer, &status->buffer[c], status->buffer_index);
                                 break;
                         } else if (!isspace(status->buffer[c])) {
-                                status_error(status, "[invalid json]");
+                                wlr_log(WLR_DEBUG, "Invalid i3bar json: expected '[' but encountered '%c'",
+                                                status->buffer[c]);
+                                status_error(status, "[invalid i3bar json]");
                                 return true;
                         }
                 }
@@ -155,6 +157,8 @@ bool i3bar_handle_readable(struct status_line *status) {
                                         ++buffer_pos;
                                         break;
                                 } else if (!isspace(status->buffer[buffer_pos])) {
+                                        wlr_log(WLR_DEBUG, "Invalid i3bar json: expected ',' but encountered '%c'",
+                                                        status->buffer[buffer_pos]);
                                         status_error(status, "[invalid i3bar json]");
                                         return true;
                                 }
@@ -166,7 +170,8 @@ bool i3bar_handle_readable(struct status_line *status) {
                 } else {
                         test_object = json_tokener_parse_ex(status->tokener,
                                         &status->buffer[buffer_pos], status->buffer_index - buffer_pos);
-                        if (json_tokener_get_error(status->tokener) == json_tokener_success) {
+                        enum json_tokener_error err = json_tokener_get_error(status->tokener);
+                        if (err == json_tokener_success) {
                                 if (json_object_get_type(test_object) == json_type_array) {
                                         if (last_object) {
                                                 json_object_put(last_object);
@@ -198,7 +203,7 @@ bool i3bar_handle_readable(struct status_line *status) {
                                         continue; // look for comma without reading more input
                                 }
                                 buffer_pos = status->buffer_index = 0;
-                        } else if (json_tokener_get_error(status->tokener) == json_tokener_continue) {
+                        } else if (err == json_tokener_continue) {
                                 json_tokener_reset(status->tokener);
                                 if (status->buffer_index < status->buffer_size) {
                                         // move the object to the start of the buffer
@@ -219,6 +224,10 @@ bool i3bar_handle_readable(struct status_line *status) {
                                         }
                                 }
                         } else {
+                                char last_char = status->buffer[status->buffer_index - 1];
+                                status->buffer[status->buffer_index - 1] = '\0';
+                                wlr_log(WLR_DEBUG, "Failed to parse i3bar json - %s: '%s%c'",
+                                                json_tokener_error_desc(err), &status->buffer[buffer_pos], last_char);
                                 status_error(status, "[failed to parse i3bar json]");
                                 return true;
                         }