[gantt] add breadcrumb with timestamp

src/gantt_source.cc

@@ -34,6 +34,7 @@
 #include "base/humanize.hh"
 #include "base/humanize.time.hh"
 #include "base/math_util.hh"
+#include "command_executor.hh"
 #include "md4cpp.hh"
 #include "sql_util.hh"
 
@@ -629,3 +630,51 @@ gantt_source::get_filtered_count_for(size_t filter_index) const
 {
     return this->gs_filter_hits[filter_index];
 }
+
+static std::vector<breadcrumb::possibility>
+timestamp_poss()
+{
+    const static std::vector<breadcrumb::possibility> retval = {
+        breadcrumb::possibility{"-1 day"},
+        breadcrumb::possibility{"-1h"},
+        breadcrumb::possibility{"-30m"},
+        breadcrumb::possibility{"-15m"},
+        breadcrumb::possibility{"-5m"},
+        breadcrumb::possibility{"-1m"},
+        breadcrumb::possibility{"+1m"},
+        breadcrumb::possibility{"+5m"},
+        breadcrumb::possibility{"+15m"},
+        breadcrumb::possibility{"+30m"},
+        breadcrumb::possibility{"+1h"},
+        breadcrumb::possibility{"+1 day"},
+    };
+
+    return retval;
+}
+
+void
+gantt_source::text_crumbs_for_line(int line,
+                                   std::vector<breadcrumb::crumb>& crumbs)
+{
+    text_sub_source::text_crumbs_for_line(line, crumbs);
+
+    if (line >= this->gs_time_order.size()) {
+        return;
+    }
+
+    const auto& row = this->gs_time_order[line];
+    char ts[64];
+
+    sql_strftime(ts, sizeof(ts), row.or_value.otr_begin, 'T');
+
+    crumbs.emplace_back(
+        std::string(ts),
+        timestamp_poss,
+        [ec = this->gs_exec_context](const auto& ts) {
+            ec->execute(fmt::format(FMT_STRING(":goto {}"),
+                                    ts.template get<std::string>()));
+        });
+    crumbs.back().c_expected_input
+        = breadcrumb::crumb::expected_input_t::anything;
+    crumbs.back().c_search_placeholder = "(Enter an absolute or relative time)";
+}

src/gantt_source.hh

@@ -67,6 +67,9 @@ public:
     int get_filtered_count() const override;
     int get_filtered_count_for(size_t filter_index) const override;
 
+    void text_crumbs_for_line(int line,
+                              std::vector<breadcrumb::crumb>& crumbs) override;
+
     nonstd::optional<vis_line_t> row_for_time(
         struct timeval time_bucket) override;
     nonstd::optional<struct timeval> time_for_row(vis_line_t row) override;
@@ -114,6 +117,7 @@ public:
     struct timeval gs_upper_bound {};
     size_t gs_filtered_count{0};
     std::array<size_t, logfile_filter_state::MAX_FILTERS> gs_filter_hits{};
+    exec_context* gs_exec_context;
 };
 
 class gantt_header_overlay : public list_overlay_source {

src/lnav.cc

@@ -2747,6 +2747,7 @@ SELECT tbl_name FROM sqlite_master WHERE sql LIKE 'CREATE VIRTUAL TABLE%'
                                          lnav_data.ld_log_source,
                                          lnav_data.ld_gantt_details_source,
                                          lnav_data.ld_gantt_status_source);
+    gantt_view_source->gs_exec_context = &lnav_data.ld_exec_context;
     auto gantt_header_source
         = std::make_shared<gantt_header_overlay>(gantt_view_source);
     lnav_data.ld_views[LNV_GANTT]