[log-view] mention that indexing is happening

Author: tstack

src/field_overlay_source.cc

@@ -779,7 +779,15 @@ field_overlay_source::list_static_overlay(const listview_curses& lv,
 {
     const std::vector<attr_line_t>* lines = nullptr;
     if (this->fos_lss.text_line_count() == 0) {
-        if (this->fos_lss.file_count() > 0) {
+        if (this->fos_lss.is_indexing_in_progress()
+            || this->fos_lss.is_rebuild_forced())
+        {
+            auto msg = lnav::console::user_message::info(
+                "Log messages are being indexed...");
+            this->fos_static_lines = msg.to_attr_line().split_lines();
+            this->fos_static_lines_state.clear();
+            lines = &this->fos_static_lines;
+        } else if (this->fos_lss.file_count() > 0) {
             hasher h;
             this->fos_lss.update_filter_hash_state(h);
             auto curr_state = h.to_array();

src/lnav.cc

@@ -1032,7 +1032,9 @@ struct refresh_status_bars {
             prompt.p_editor.set_inactive_value(cancel_msg);
         }
 
-        if (!lnav_data.ld_log_source.is_indexing_in_progress()) {
+        if (!lnav_data.ld_log_source.is_indexing_in_progress()
+            || lnav_data.ld_log_source.text_line_count() == 0)
+        {
             lnav_data.ld_view_stack.do_update();
         }
         if (this->rsb_top_source->update_time(current_time)) {

src/logfile_sub_source.hh

@@ -272,6 +272,8 @@ public:
 
     void set_force_rebuild() { this->lss_force_rebuild = true; }
 
+    bool is_rebuild_forced() const { return this->lss_force_rebuild; }
+
     void set_min_log_level(log_level_t level)
     {
         if (this->lss_min_log_level != level) {