From df8d3ec40ba5be54d0fea2d74709e803a588f526 Mon Sep 17 00:00:00 2001
From: Tom Black <blacktm@gmail.com>
Date: Wed, 26 Sep 2018 17:27:57 -0700
Subject: Handle adding controller mappings through Window class

---
 ext/ruby2d/ruby2d.c  | 42 +++++++++++++++++++++---------------------
 lib/ruby2d/window.rb | 12 ++++++++++++
 2 files changed, 33 insertions(+), 21 deletions(-)

diff --git a/ext/ruby2d/ruby2d.c b/ext/ruby2d/ruby2d.c
index 12e868e..5878d7e 100644
--- a/ext/ruby2d/ruby2d.c
+++ b/ext/ruby2d/ruby2d.c
@@ -926,6 +926,22 @@ static R_VAL ruby2d_window_ext_get_display_dimensions(R_VAL self) {
 }
 
 
+/*
+ * Ruby2D::Window#ext_add_controller_mappings
+ */
+#if MRUBY
+static R_VAL ruby2d_window_ext_add_controller_mappings(mrb_state* mrb, R_VAL self) {
+  mrb_value path;
+  mrb_get_args(mrb, "o", &path);
+#else
+static R_VAL ruby2d_window_ext_add_controller_mappings(R_VAL self, R_VAL path) {
+#endif
+  S2D_Log(S2D_INFO, "Adding controller mappings from `%s`", RSTRING_PTR(path));
+  S2D_AddControllerMappingsFromFile(RSTRING_PTR(path));
+  return R_NIL;
+}
+
+
 /*
  * Ruby2D::Window#ext_show
  */
@@ -941,27 +957,8 @@ static R_VAL ruby2d_window_ext_show(R_VAL self) {
     S2D_Diagnostics(true);
   }
 
-  // Load controller mappings
-  #if !RUBY2D_IOS_TVOS && !WINDOWS
-    #include <pwd.h>
-
-    char *homedir;
-    if ((homedir = getenv("HOME")) == NULL) {
-      homedir = getpwuid(getuid())->pw_dir;
-    }
-
-    char *mappings = "/.ruby2d/controllers.txt";
-    char *full_mappings_path = malloc(strlen(homedir) + strlen(mappings) + 1);
-    strcpy(full_mappings_path, homedir); strcat(full_mappings_path, mappings);
-    printf("%s\n", full_mappings_path);
-
-    // Load controller mappings, if DB file exists
-    if (S2D_FileExists(full_mappings_path)) {
-      S2D_AddControllerMappingsFromFile(full_mappings_path);
-    }
-
-    free(full_mappings_path);
-  #endif
+  // Add controller mappings from file
+  r_funcall(self, "add_controller_mappings", 0);
 
   // Get window attributes
   char *title = RSTRING_PTR(r_iv_get(self, "@title"));
@@ -1133,6 +1130,9 @@ void Init_ruby2d() {
   // Ruby2D::Window#ext_get_display_dimensions
   r_define_method(ruby2d_window_class, "ext_get_display_dimensions", ruby2d_window_ext_get_display_dimensions, r_args_none);
 
+  // Ruby2D::Window#ext_add_controller_mappings
+  r_define_method(ruby2d_window_class, "ext_add_controller_mappings", ruby2d_window_ext_add_controller_mappings, r_args_req(1));
+
   // Ruby2D::Window#ext_show
   r_define_method(ruby2d_window_class, "ext_show", ruby2d_window_ext_show, r_args_none);
 
diff --git a/lib/ruby2d/window.rb b/lib/ruby2d/window.rb
index 385070b..fee0893 100644
--- a/lib/ruby2d/window.rb
+++ b/lib/ruby2d/window.rb
@@ -54,6 +54,9 @@ module Ruby2D
       # Mouse X and Y position in the window
       @mouse_x, @mouse_y = 0, 0
 
+      # Controller axis and button mappings file
+      @controller_mappings = File.expand_path('~') + "/.ruby2d/controllers.txt"
+
       # Renderable objects currently in the window, like a linear scene graph
       @objects = []
 
@@ -314,6 +317,15 @@ module Ruby2D
       end
     end
 
+    # Add controller mappings from file
+    def add_controller_mappings
+      unless RUBY_ENGINE == 'opal'
+        if File.exists? @controller_mappings
+          ext_add_controller_mappings(@controller_mappings)
+        end
+      end
+    end
+
     # Controller callback method, called by the native and web extentions
     def controller_callback(which, type, axis, value, button)
       # All controller events
-- 
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