improve legend

src/render.cpp

@@ -424,14 +424,14 @@ Ansi_Color viewer_to_ansi_color(const Viewer &viewer, const Term_Viewer &tviewer
   if (col == imcol(viewer.col_page_start)) return tviewer.col_page_start;
   if (col == imcol(viewer.col_checksum)) return tviewer.col_checksum;
   if (col == imcol(viewer.col_highlight)) return tviewer.col_highlight;
-  for (u64 section = 0; section < Sec_COUNT; ++section)
+  for (u64 section = 1; section < Sec_COUNT; ++section)
     if (col == imcol(viewer.col_section[section]))
       return tviewer.col_section[section];
   return ACol_None;
 }
 
 internal
-String8 render_legend_to_string(Arena *arena, const Term_Viewer &viewer)
+String8 render_legend_to_string(Arena *arena, const Term_Viewer &viewer, const App_State &app)
 {
   Temp scratch = scratch_begin(&arena, 1);
   defer { scratch_end(scratch); };
@@ -441,12 +441,24 @@ String8 render_legend_to_string(Arena *arena, const Term_Viewer &viewer)
     String8 str;
   } *head = nullptr, *tail = nullptr;
   
+  String8 color_none = ansi_color_table[ACol_None];
     u64 tot_len = 0;
-  for (u64 section = 0; section < Sec_COUNT; ++section) {
+  for (u64 section = 1; section < Sec_COUNT; ++section) {
     Ansi_Color color = viewer.col_section[section];
     String8 color_str = ansi_color_table[color];
     String8 sec_name = section_names[section];
-    String8 s = push_str8f(scratch.arena, "%s%s  ", color_str.c(), sec_name.c());
+    Byte_Range range = get_section_range(app, static_cast<Section_Id>(section));
+    String8 s;
+    if (range.len)
+      s = push_str8f(scratch.arena, "%s%20s %s0x%lX - 0x%lX [%lu B]\n", 
+                   color_str.c(), sec_name.c(), color_none.c(),
+                   range.start, range.end(), range.len);
+    else if (section == Sec_Page)
+      s = push_str8f(scratch.arena, "%s%20s %s(%lu) [%lu B] \n", 
+                   color_str.c(), sec_name.c(), color_none.c(), app.rndata.n_pages, app.rndata.tot_page_size);
+    else if (section == Sec_Page_List)
+      s = push_str8f(scratch.arena, "%s%20s %s(%lu) [%lu B]\n", 
+                   color_str.c(), sec_name.c(), color_none.c(), app.rndata.n_cluster_groups, app.rndata.tot_page_list_size);
     String8_Node *node = arena_push<String8_Node>(scratch.arena);
     node->str = s;
     if (!tail) {
@@ -475,12 +487,23 @@ String8 render_range_to_string(Arena *arena, App_State &app, u64 len, u64 n_cols
 {
   Term_Viewer viewer = make_term_viewer(n_cols);
 
-  String8 legend = render_legend_to_string(arena, viewer);
+  String8 legend = render_legend_to_string(arena, viewer, app);
+
+  // scratch must be created after `render_legend_to_string`
+  Temp scratch = scratch_begin(&arena, 1);
+  defer { scratch_end(scratch); };
+
+  String8 ntpl_desc = rntuple_description(scratch.arena, app.rndata);
+  String8 header_str = push_str8f(scratch.arena, "RNTuple '%s' (%s) from file \"%s\"",
+                                  app.ntpl_name.c(), ntpl_desc.c(), app.inspected_file.name.c());
   
   // NOTE: +3 because we need 2 chars for each byte + 1 whitespace.
   u64 buf_size = (ACOL_MAX_LEN + 3) * len;
   u64 n_newlines = len / viewer.max_cols;
   buf_size += n_newlines;
+  buf_size += 1; // initial newline
+  buf_size += header_str.size;
+  buf_size += 2; // two newlines
   buf_size += 2; // two newlines
   buf_size += legend.size;
   buf_size += 1; // trailing zero
@@ -497,10 +520,15 @@ String8 render_range_to_string(Arena *arena, App_State &app, u64 len, u64 n_cols
   assert(start <= max_addr);
   len = min(len, max_addr - start);
   
-  Temp scratch = scratch_begin(&arena, 1);
-  defer { scratch_end(scratch); };
-  
   u8 *cur = buf;
+  *cur++ = '\n';
+
+  // header
+  memcpy(cur, header_str.str, header_str.size);
+  cur += header_str.size;
+  *cur++ = '\n';
+  *cur++ = '\n';
+  
   for (u64 i = 0; i < len; ++i) {
     u64 off = start + i;
 

src/rntviewer.cpp

@@ -28,6 +28,9 @@
 #define GLFW_INCLUDE_NONE
 #include <GLFW/glfw3.h>
 
+#define V_MAJOR "0"
+#define V_MINOR "1"
+
 #include "root/root_inc.h"
 #include "root/RMicroFileReader.hxx"
 
@@ -79,8 +82,9 @@ internal
 void print_help(const char *argv0)
 {
   fprintf(stderr,
-    "Usage: %s [-t] [-s START] [-l LEN] [-w WIDTH] <ntuple_name> <ntuple_file.root>"   
+    "rntviewer v" V_MAJOR "." V_MINOR " by silverweed"
     "\n"
+    "\nUsage: %s [-t] [-s START] [-l LEN] [-w WIDTH] <ntuple_name> <ntuple_file.root>"   
     "\n\t-t: no graphics, output to terminal"
     "\n\t-s: set first displayed byte to START"
     "\n\t-l: display LEN bytes (only in terminal mode)"