add recent rom list in menu

src/crab/common/config.cr

@@ -1,7 +1,7 @@
 require "yaml"
 
 CONFIG_FILE_PATH = Path["~/.config/crab/"].expand(home: true)
-CONFIG_FILE_NAME = Path["crab.yml"]
+CONFIG_FILE_NAME = "crab.yml"
 CONFIG_FILE      = CONFIG_FILE_PATH / CONFIG_FILE_NAME
 
 Dir.mkdir_p(CONFIG_FILE_PATH)
@@ -11,6 +11,7 @@ class Config
   include YAML::Serializable
   property explorer_dir : String?
   property keybindings : Hash(LibSDL::Keycode, Input)?
+  property recents : Array(String)?
   property gba : GBA?
   property gbc : GBC?
 
@@ -80,6 +81,14 @@ def set_keybindings(keybindings : Hash(LibSDL::Keycode, Input)) : Nil
   write { |config| config.keybindings = keybindings }
 end
 
+def recents : Array(String)
+  config.recents || [] of String
+end
+
+def set_recents(recents : Array(String)) : Nil
+  write { |config| config.recents = recents }
+end
+
 def gbc_bios : String?
   config.gbc.try(&.bios)
 end

src/crab/common/frontend/sdl_opengl_imgui_frontend.cr

@@ -26,6 +26,7 @@ class SDLOpenGLImGuiFrontend < Frontend
   @blending = false
   @enable_overlay = false
   @pause = false
+  @recents : Array(String) = recents
 
   @opengl_info : OpenGLInfo
 
@@ -85,6 +86,12 @@ class SDLOpenGLImGuiFrontend < Frontend
     LibSDL.close_audio(1)
     @controller = init_controller(nil, rom)
     @file_explorer.clear_selection
+
+    @recents.delete(rom)
+    @recents.insert(0, rom)
+    @recents.pop(@recents.size - 8) if @recents.size > 8
+    set_recents @recents
+
     LibSDL.set_window_size(@window, @controller.window_width * SCALE, @controller.window_height * SCALE)
     LibSDL.set_window_position(@window, LibSDL::WindowPosition::CENTERED, LibSDL::WindowPosition::CENTERED)
     LibGL.viewport(0, 0, @window.width, @window.height)
@@ -175,10 +182,23 @@ class SDLOpenGLImGuiFrontend < Frontend
 
           open_rom_selection = ImGui.menu_item "Open ROM"
           open_bios_selection = ImGui.menu_item "Select BIOS" unless @controller.class == StubbedController
+          if ImGui.begin_menu "Recent", @recents.size > 0
+            @recents.each do |recent|
+              load_new_rom(recent) if ImGui.menu_item recent
+            end
+            ImGui.separator
+            if ImGui.menu_item "Clear"
+              @recents.clear
+              set_recents @recents
+            end
+            ImGui.end_menu
+          end
+          ImGui.separator
           ImGui.menu_item "Overlay", "", pointerof(@enable_overlay)
           # ImGui.menu_item "Blend", "", pointerof(@enable_blend) todo: re-implement blending now that frames are cleared
           ImGui.menu_item "Pause", "", pointerof(@pause)
           open_keybindings = ImGui.menu_item "Keybindings"
+          ImGui.separator
           exit if ImGui.menu_item "Exit"
           ImGui.end_menu