Merge pull request 'lju/load-paterns' (#3) from lju/load-paterns into main

Reviewed-on: #3

includes/context.hpp

@@ -33,6 +33,7 @@ typedef struct ctx {
   std::shared_ptr<Selection> selection = nullptr;
   std::shared_ptr<PaternsMenu> paterns_menu = nullptr;
   nlohmann::json config_json;
+  std::filesystem::path program_dir;
 } ctx;
 
 } // namespace gol

includes/paterns_menu.hpp

@@ -8,17 +8,31 @@
 
 #pragma once
 
+#include <memory>
+#include <context.hpp>
+#include <vector>
+#include <map>
+#include <string>
+
 namespace gol {
 
 class PaternsMenu {
 public:
-  PaternsMenu() = default;
+  PaternsMenu(std::shared_ptr<ctx>);
   ~PaternsMenu() = default;
   void Toogle();
   bool isOpen();
   void display();
+  void refresh();
 private:
+  bool loadPatern(std::string &path);
   bool is_open_ = false;
+  std::shared_ptr<ctx> context_ = nullptr;
+  std::map<std::string,std::string> paterns_paths_list_;
+  std::vector<std::string> paterns_name_list_;
+  int patern_width_ = 0;
+  int patern_height_ = 0;
+  std::vector<uint32_t> loaded_patern_;
 };
 
 } // namespace gol

src/main.cpp

@@ -82,6 +82,15 @@ int main(int ac, char **av) {
     context->config_json["fps"] = 800;
   }
 
+  // Get program directory
+  char path_buf[1024];
+  ssize_t len = readlink("/proc/self/exe", path_buf, sizeof(path_buf)-1);
+  if (len == -1) {
+    std::cerr << "Failed to determine program directory" << std::endl;
+    return 1;
+  }
+  context->program_dir = std::filesystem::path(path_buf).parent_path();
+
   InitWindow(context->config_json["screen_width"], context->config_json["screen_height"],
              &av[0][2]);
 
@@ -97,7 +106,7 @@ int main(int ac, char **av) {
   context->render = std::make_shared<Render>(context->settings_menu->getCellSize());
   context->selection_menu = std::make_shared<gol::SelectionMenu>(context);
   context->selection = std::make_shared<gol::Selection>(context);
-  context->paterns_menu = std::make_shared<gol::PaternsMenu>();
+  context->paterns_menu = std::make_shared<gol::PaternsMenu>(context);
 
   // Speed handling values
   float sim_speed = 1.0f;
@@ -106,6 +115,7 @@ int main(int ac, char **av) {
 
   // Setups
   context->rules->setup(context->world);
+  context->paterns_menu->refresh();
   // Diplay generations
   while (!WindowShouldClose()) {
     // Frames shinenigans

src/paterns_menu.cpp

@@ -6,28 +6,92 @@
 * ------
 */
 
-#include <paterns_menu.hpp>
-
 #include <imgui.h>
 #include <raylib.h>
 #include <rlImGui.h>
 
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <paterns_menu.hpp>
+#include <sstream>
+
 namespace gol {
 
-void PaternsMenu::Toogle() {
-  is_open_ = !is_open_;
+PaternsMenu::PaternsMenu(std::shared_ptr<ctx> ctx) : context_(ctx) {}
+
+void PaternsMenu::Toogle() { is_open_ = !is_open_; }
+
+bool PaternsMenu::isOpen() { return is_open_; }
+
+void PaternsMenu::refresh() {
+  paterns_name_list_.clear();
+  paterns_paths_list_.clear();
+  auto paterns_path = context_->program_dir / "paterns";
+  if (std::filesystem::exists(paterns_path) &&
+      std::filesystem::is_directory(paterns_path)) {
+    for (const auto &entry :
+         std::filesystem::directory_iterator(paterns_path)) {
+      if (!std::filesystem::is_directory(entry) &&
+          entry.path().has_filename()) {
+        paterns_paths_list_[entry.path().filename()] = entry.path();
+        paterns_name_list_.push_back(entry.path().filename());
+      }
+    }
+  }
 }
 
-bool PaternsMenu::isOpen() {
-  return is_open_;
+bool PaternsMenu::loadPatern(std::string &path) {
+  std::ifstream file(path);
+  std::string file_data;
+  if (!file.is_open()) {
+    std::cerr << "Failure in opening patern : " << path << std::endl;
+    return false;
+  }
+  loaded_patern_.clear();
+  try {
+    std::getline(file, file_data);
+    std::stringstream ss(file_data);
+    std::string width, height, data;
+    std::getline(ss, width, '|');
+    std::getline(ss, height, '|');
+    std::getline(ss, data, '|');
+    patern_width_ = std::stoi(width);
+    patern_height_ = std::stoi(height);
+    for (int i = 0; i < patern_width_ * patern_height_; i++) {
+      loaded_patern_.push_back((data[i] == '1') ? 1 : 0);
+    }
+  } catch (std::exception &e) {
+    std::cerr << "Failure in loading patern : " << path << std::endl;
+    return 1;
+  }
+  return true;
 }
 
 void PaternsMenu::display() {
   if (is_open_) {
-    ImGuiWindowFlags paterns_flags = ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize;
-    ImGui::SetNextWindowSize(ImVec2(150, 200), ImGuiCond_Always);
+    ImGuiWindowFlags paterns_flags =
+        ImGuiWindowFlags_AlwaysAutoResize | ImGuiWindowFlags_NoResize;
+    ImGui::SetNextWindowSize(ImVec2(200, 250), ImGuiCond_Always);
     ImGui::Begin("paterns", &is_open_, paterns_flags);
-    ImGui::Button("refresh");
+    for (auto patern_name : paterns_name_list_) {
+      ImGui::PushID(patern_name.c_str());
+      if (ImGui::Button(patern_name.c_str()) &&
+          loadPatern(paterns_paths_list_[patern_name])) {
+        // TODO: If patern is loaded successfuly, start the preview in the
+        // editor
+      }
+      ImGui::PopID();
+      ImGui::SameLine(ImGui::GetWindowWidth() - 57.);
+      std::string del_id = patern_name.c_str();
+      del_id.append("_del");
+      ImGui::PushID(del_id.c_str());
+      if (ImGui::Button("delete")) {
+        std::filesystem::remove(paterns_paths_list_[patern_name]);
+        refresh();
+      }
+      ImGui::PopID();
+    }
     ImGui::End();
   }
 }

src/selection_menu.cpp

@@ -12,6 +12,7 @@
 #include <filesystem>
 
 #include <selection_menu.hpp>
+#include <paterns_menu.hpp>
 
 namespace gol {
 
@@ -62,11 +63,8 @@ void SelectionMenu::display() {
     rlImGuiImageSize(&selectionTexture_.texture, 200, 200);
     ImGui::InputText("patern_name", patern_name_, 255);
     if (ImGui::Button("Save")) {
-      char path_buf[1024];
-      ssize_t len = readlink("/proc/self/exe", path_buf, sizeof(path_buf)-1);
-      if (len != -1) {
       // Create paterns dir if not present
-        std::filesystem::path paterns_dir = std::filesystem::path(path_buf).parent_path() / "paterns";
+      std::filesystem::path paterns_dir = context_->program_dir / "paterns";
       if (!std::filesystem::exists(paterns_dir) && !std::filesystem::create_directory(paterns_dir)) {
         std::cerr << "Failed to create paterns directory" << std::endl;
       } else { // Could be optimized by early returning in a function
@@ -93,11 +91,11 @@ void SelectionMenu::display() {
           }
           patern_file << std::flush;
           patern_file.close();
+          context_->paterns_menu->refresh();
         }
       }
       sel_ctrl_ = false;
     }
-    }
     ImGui::SameLine();
     if (ImGui::Button("Discard")) {
       sel_ctrl_ = false;