add ReadOnly but allow selecting bytes

src/render.cpp

@@ -120,7 +120,7 @@ internal
 MemoryEditor make_memory_editor(App_State &app)
 {
   MemoryEditor mem_edit;
-  // mem_edit.ReadOnly = true;
+  mem_edit.ReadOnly = true;
   mem_edit.Cols = 32;
   mem_edit.OptShowDataPreview = true;
   mem_edit.BgColorFn = mem_edit_bg_color_fn;
@@ -176,6 +176,18 @@ void viewer_jump_to_page(App_State &app, u64 page_idx)
   viewer_jump_to(app.viewer, page->range.start);
 }
 
+internal
+void viewer_jump_to_page_list(App_State &app, u64 page_list_idx)
+{
+  assert(app.rndata.n_cluster_groups > 0);
+  page_list_idx = (page_list_idx + app.rndata.n_cluster_groups) % app.rndata.n_cluster_groups;
+  
+  Cluster_Group_Info &cg_info = app.rndata.cluster_groups[page_list_idx];
+
+  app.viewer.latest_page_list_gone_to = page_list_idx;
+  viewer_jump_to(app.viewer, cg_info.rng_page_list.start);
+}
+
 internal
 void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
 {
@@ -216,6 +228,8 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
 
     // Draw main content
     {
+      const u64 step_u64 = 1;
+
       ImGui::BeginTable("Hex View", 2, ImGuiTableFlags_Resizable);
 
       ImGui::TableNextColumn();
@@ -236,14 +250,20 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
       ImGui::ColorEdit3("_TFile Object",   app.viewer.col_tfile_obj,  flags);
       ImGui::SameLine(); 
       if (ImGui::Button("TFile Object"))   viewer_jump_to(app.viewer, app.tfile_data.rng_root_file_obj.start);
+      ImGui::SameLine(); 
+      ImGui::Text("%s", to_pretty_size(scratch.arena, app.tfile_data.rng_root_file_obj.len).c());
 
       ImGui::ColorEdit3("_TFile Info",   app.viewer.col_tfile_info,  flags);
       ImGui::SameLine(); 
       if (ImGui::Button("TFile Info"))   viewer_jump_to(app.viewer, app.tfile_data.rng_root_file_info.start);
+      ImGui::SameLine(); 
+      ImGui::Text("%s", to_pretty_size(scratch.arena, app.tfile_data.rng_root_file_info.len).c());
 
       ImGui::ColorEdit3("_TFile FreeList",   app.viewer.col_tfile_free,  flags);
       ImGui::SameLine(); 
       if (ImGui::Button("TFile FreeList"))   viewer_jump_to(app.viewer, app.tfile_data.rng_root_file_free.start);
+      ImGui::SameLine(); 
+      ImGui::Text("%s", to_pretty_size(scratch.arena, app.tfile_data.rng_root_file_free.len).c());
 
       ImGui::ColorEdit3("_RNTuple Anchor", app.viewer.col_anchor, flags);
       ImGui::SameLine(); 
@@ -276,10 +296,10 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
       if (ImGui::Button("Page"))           viewer_jump_to_page(app, app.viewer.latest_page_gone_to);
       ImGui::SameLine();
       {
-        // TODO: support u64
+        const u64 step_fast_u64 = app.rndata.n_pages / 100;
-        i32 page_to_go_to = static_cast<i32>(app.viewer.latest_page_gone_to);
+        u64 page_to_go_to = app.viewer.latest_page_gone_to;
         ImGui::PushItemWidth(100.f);
-        if (ImGui::InputInt("##page_viewed", &page_to_go_to))
+        if (ImGui::InputScalar("##page_viewed", ImGuiDataType_U64, &page_to_go_to, &step_u64, &step_fast_u64, "%u"))
           viewer_jump_to_page(app, page_to_go_to);
         ImGui::PopItemWidth();
       }
@@ -292,7 +312,15 @@ void update_and_render(Arena *arena, App_State &app, f32 delta_time_ms)
 
       ImGui::ColorEdit3("_Page List", app.viewer.col_page_list, flags);
       ImGui::SameLine(); 
-      if (ImGui::Button("Page List")) {} // TODO jump to next page list
+      if (ImGui::Button("Page List"))      viewer_jump_to_page_list(app, app.viewer.latest_page_list_gone_to);
+      ImGui::SameLine();
+      {
+        u64 page_list_to_go_to = app.viewer.latest_page_list_gone_to;
+        ImGui::PushItemWidth(80.f);
+        if (ImGui::InputScalar("##page_list_viewed", ImGuiDataType_U64, &page_list_to_go_to, &step_u64, nullptr, "%u"))
+          viewer_jump_to_page_list(app, page_list_to_go_to);
+        ImGui::PopItemWidth();
+      }
       ImGui::SameLine(); 
       ImGui::Text("%s", to_pretty_size(scratch.arena, app.rndata.tot_page_list_size).c());
 

src/render.h

@@ -15,7 +15,11 @@ struct Viewer {
   f32 col_page_list[3];
 
   u64 base_display_addr;
+
   u64 latest_page_gone_to;
+  u64 latest_key_gone_to;
+  u64 latest_checksum_gone_to;
+  u64 latest_page_list_gone_to;
 };
 
 struct Edit_Bg_Color_Data {

src/rntuple.h

@@ -16,6 +16,12 @@ struct Page_Info_Node {
   }
 };
 
+// Used to store location information about stuff like checksums, page lists, etc
+struct Range_Seq {
+  Range_Seq *next;
+  Byte_Range range;
+};
+
 static const Page_Info_Node invalid_pinfo {};
 
 struct Page_Info_Group {
@@ -65,6 +71,12 @@ struct RNTuple_Data {
   u64 n_elems;
   u64 tot_page_size;
 
+  Range_Seq *checksums;
+  u64        n_checksums;
+
+  Range_Seq *page_lists;
+  u64        n_page_lists;
+
   Cluster_Group_Info *cluster_groups;
   u64 n_cluster_groups;
   u64 tot_page_list_size;

third_party/imgui_club/imgui_memory_editor.h

@@ -245,7 +245,7 @@ struct MemoryEditor
 
         bool data_next = false;
 
-        if (ReadOnly || DataEditingAddr >= mem_size)
+        if (/*ReadOnly ||*/ DataEditingAddr >= mem_size)
             DataEditingAddr = (size_t)-1;
         if (DataPreviewAddr >= mem_size)
             DataPreviewAddr = (size_t)-1;
@@ -320,6 +320,7 @@ struct MemoryEditor
                         draw_list->AddRectFilled(pos, ImVec2(pos.x + highlight_width, pos.y + s.LineHeight), BgColorFn(mem_data, addr, BgColorFnUserData));
                     }
 
+                    #if 0
                     if (DataEditingAddr == addr)
                     {
                         // Display text input on current byte
@@ -380,6 +381,7 @@ struct MemoryEditor
                         ImGui::PopID();
                     }
                     else
+                    #endif
                     {
                         // NB: The trailing space is not visible but ensure there's no gap that the mouse cannot click on.
                         ImU8 b = ReadFn ? ReadFn(mem_data, addr) : mem_data[addr];
@@ -402,7 +404,7 @@ struct MemoryEditor
                             else
                                 ImGui::Text(format_byte_space, b);
                         }
-                        if (!ReadOnly && ImGui::IsItemHovered() && ImGui::IsMouseClicked(0))
+                        if (/*!ReadOnly &&*/ ImGui::IsItemHovered() && ImGui::IsMouseClicked(0))
                         {
                             DataEditingTakeFocus = true;
                             data_editing_addr_next = addr;