[feat] optimize certificate selection table

src/gui/render.h

@@ -458,6 +458,7 @@ class Render {
   bool self_hosted_server_config_window_pos_reset_ = true;
   std::string selected_current_file_path_ = "";
   std::string selected_file_ = "";
+  bool show_file_browser_ = true;
   /* ------ main window property end ------ */
 
   /* ------ sub stream window property start ------ */

src/gui/windows/server_settings_window.cpp

@@ -28,6 +28,11 @@ std::vector<std::string> GetRootEntries() {
 
 int Render::ShowSimpleFileBrowser() {
   std::string display_text;
+
+  if (selected_current_file_path_.empty()) {
+    selected_current_file_path_ = std::filesystem::current_path().string();
+  }
+
   if (!selected_file_.empty()) {
     display_text = std::filesystem::path(selected_file_).filename().string();
   } else if (selected_current_file_path_ != "Root") {
@@ -43,11 +48,21 @@ int Render::ShowSimpleFileBrowser() {
         localization::select_a_file[localization_language_index_].c_str();
   }
 
-  if (ImGui::BeginCombo("##select_a_file", display_text.c_str())) {
+  if (show_file_browser_) {
+    ImGui::PushItemFlag(ImGuiItemFlags_AutoClosePopups, false);
+
+    float fixed_width = 130.0f;
+    ImGui::SetNextItemWidth(fixed_width);
+    ImGui::SetNextWindowSizeConstraints(ImVec2(fixed_width, 0),
+                                        ImVec2(fixed_width, 100.0f));
+
+    if (ImGui::BeginCombo("##select_a_file", display_text.c_str(), 0)) {
+      bool file_selected = false;
+
+      auto roots = GetRootEntries();
       if (selected_current_file_path_ == "Root" ||
           !std::filesystem::exists(selected_current_file_path_) ||
           !std::filesystem::is_directory(selected_current_file_path_)) {
-      auto roots = GetRootEntries();
         for (const auto& root : roots) {
           if (ImGui::Selectable(root.c_str())) {
             selected_current_file_path_ = root;
@@ -58,16 +73,20 @@ int Render::ShowSimpleFileBrowser() {
         std::filesystem::path p(selected_current_file_path_);
 
         if (ImGui::Selectable("..")) {
-        if (p.has_parent_path() && p != p.root_path())
+          if (std::find(roots.begin(), roots.end(),
-          selected_current_file_path_ = p.parent_path().string();
+                        selected_current_file_path_) != roots.end()) {
-        else
             selected_current_file_path_ = "Root";
+          } else if (p.has_parent_path()) {
+            selected_current_file_path_ = p.parent_path().string();
+          } else {
+            selected_current_file_path_ = "Root";
+          }
           selected_file_.clear();
         }
 
         try {
-        for (const auto& entry :
+          for (const auto& entry : std::filesystem::directory_iterator(
-             std::filesystem::directory_iterator(selected_current_file_path_)) {
+                   selected_current_file_path_)) {
             std::string name = entry.path().filename().string();
             if (entry.is_directory()) {
               if (ImGui::Selectable(name.c_str())) {
@@ -77,6 +96,8 @@ int Render::ShowSimpleFileBrowser() {
             } else {
               if (ImGui::Selectable(name.c_str())) {
                 selected_file_ = entry.path().string();
+                file_selected = true;
+                show_file_browser_ = false;
               }
             }
           }
@@ -87,6 +108,10 @@ int Render::ShowSimpleFileBrowser() {
 
       ImGui::EndCombo();
     }
+    ImGui::PopItemFlag();
+  } else {
+    show_file_browser_ = true;
+  }
 
   return 0;
 }