Partially revert ask_file/folder on linux to explicitly use zenity/kdialog commands directly instead of using libui hack which leaves the file browser window open after returning

Gemfile

@@ -4,15 +4,15 @@ gem "base64"
 gem "excon"
 gem "cyberarm_engine"
 gem "sdl2-bindings"
-gem "libui"
+gem "libui", platforms: [:windows]
 gem "digest-crc"
 gem "i18n"
 gem "ircparser"
 gem "rexml"
 gem "rubyzip"
 gem "websocket-client-simple"
-gem "win32-process", platforms: [:x64_mingw, :mingw]
-gem "win32-security", platforms: [:x64_mingw, :mingw]
+gem "win32-process", platforms: [:windows]
+gem "win32-security", platforms: [:windows]
 
 # PACKAGING NOTES
 # bundler 2.5.x doesn't seem to play nice with ocra[n]

Gemfile.lock

@@ -10,10 +10,11 @@ GEM
     event_emitter (0.2.6)
     excon (0.109.0)
     ffi (1.16.3)
+    ffi (1.16.3-x64-mingw-ucrt)
     ffi-win32-extensions (1.0.4)
       ffi
     gosu (1.4.6)
-    i18n (1.14.1)
+    i18n (1.14.4)
       concurrent-ruby (~> 1.0)
     ircparser (1.0.0)
     libui (0.0.15)
@@ -34,6 +35,7 @@ GEM
 
 PLATFORMS
   x64-mingw-ucrt
+  x86_64-linux
 
 DEPENDENCIES
   base64

lib/common.rb

@@ -147,16 +147,56 @@ class W3DHub
   end
 
   def self.ask_file(title: "Open File", filter: "*game*.exe")
+    if W3DHub.unix?
+      # search for command
+      cmds = %w{ zenity matedialog qarma kdialog }
+
+      command = cmds.find do |cmd|
+        cmd if system("which #{cmd}")
+      end
+
+      path = case File.basename(command)
+      when "zenity", "matedialog", "qarma"
+        `#{command} --file-selection --title "#{title}" --file-filter "#{filter}"`
+      when "kdialog"
+        `#{command} --title "#{title}" --getopenfilename . "#{filter}"`
+      else
+        raise "No known command found for system file selection dialog!"
+      end
+
+      path.strip
+    else
       result_ptr = LibUI.open_file(LIBUI_WINDOW)
       result = result_ptr.null? ? "" : result_ptr.to_s.gsub("\\", "/")
 
-      result
+      result.strip
+    end
   end
 
   def self.ask_folder(title: "Open Folder")
-    result_ptr = LibUI.open_folder(window)
-    result = result_ptr.null? ? "" : result_ptr.to_s.gsub("\\", "/")
+    if W3DHub.unix?
+      # search for command
+      cmds = %w{ zenity matedialog qarma kdialog }
 
-    result
+      command = cmds.find do |cmd|
+        cmd if system("which #{cmd}")
+      end
+
+      path = case File.basename(command)
+      when "zenity", "matedialog", "qarma"
+        `#{command} --file-selection --directory --title "#{title} #{Dir.home}"`
+      when "kdialog"
+        `#{command} --title "#{title}" --getexistingdirectory #{Dir.home}"`
+      else
+        raise "No known command found for system file selection dialog!"
+      end
+
+      path.strip
+    else
+      result_ptr = LibUI.open_folder(window)
+      result = result_ptr.null? ? "" : result_ptr.to_s.gsub("\\", "/")
+
+      result.strip
+    end
   end
 end

w3d_hub_linux_launcher.rb

@@ -80,15 +80,6 @@ require "i18n"
 require "websocket-client-simple"
 require "English"
 require "sdl2"
-require "libui"
-
-# Using a WHOLE ui library for: native file/folder open dialogs...
-LibUI.init
-LIBUI_WINDOW = LibUI.new_window("", 100, 100, 0)
-at_exit do
-  LibUI.control_destroy(LIBUI_WINDOW)
-  LibUI.uninit
-end
 
 I18n.load_path << Dir["#{W3DHub::GAME_ROOT_PATH}/locales/*.yml"]
 I18n.default_locale = :en
@@ -158,7 +149,18 @@ require_relative "lib/asterisk/states/game_form"
 require_relative "lib/asterisk/states/irc_profile_form"
 require_relative "lib/asterisk/states/server_profile_form"
 
-require "win32/process" if W3DHub.windows?
+if W3DHub.windows?
+  require "libui"
+  require "win32/process"
+
+  # Using a WHOLE ui library for: native file/folder open dialogs...
+  LibUI.init
+  LIBUI_WINDOW = LibUI.new_window("", 100, 100, 0)
+  at_exit do
+    LibUI.control_destroy(LIBUI_WINDOW)
+    LibUI.uninit
+  end
+end
 
 logger.info(W3DHub::LOG_TAG) { "W3D Hub Linux Launcher v#{W3DHub::VERSION}" }