consume events in RGFW loop. (Next: react to input events.)

ffi/rgfw-export.c

@@ -28,6 +28,10 @@ void swapBuffers(RGFW_window* window) {
   RGFW_window_swapBuffers_OpenGL(window);
 }
 
+void writeClipboard(char* string, int stringSize) {
+  RGFW_writeClipboard(string, stringSize);
+}
+
 // OpenGL constants used below
 unsigned int VERTEX_SHADER = GL_VERTEX_SHADER;
 unsigned int FRAGMENT_SHADER = GL_FRAGMENT_SHADER;

ffi/rgfw-import.sml

@@ -11,4 +11,6 @@ struct
     _import "shouldCloseWindow" public : window -> bool;
   val swapBuffers =
     _import "swapBuffers" public : window -> unit;
+  val writeClipboard =
+    _import "writeClipboard" public : string * int -> unit;
 end

shell/glfw-loop.sml

@@ -1,7 +1,5 @@
 structure GlfwLoop =
 struct
-  open DrawMsg
-
   fun yank (window, str) =
     let
       (* print when text is yanked
@@ -16,6 +14,8 @@ struct
 
   fun consumeEvent (drawState, window, msg) =
     let
+      open DrawMsg
+
       val {textVertexBuffer, textProgram, textDrawLength = _, ...} = drawState
     in
       case msg of

shell/rgfw-loop.sml

@@ -1,6 +1,34 @@
 structure RgfwLoop =
 struct
-  fun loop (window, app) =
+  fun yank string =
+    Rgfw.writeClipboard (string, String.size string)
+
+  fun consumeEvent (drawState, window, msg) =
+    let
+      open DrawMsg
+
+      val {textVertexBuffer, textProgram, textDrawLength = _, ...} = drawState
+    in
+      case msg of
+        DRAW_TEXT textVec => GlDraw.uploadText (drawState, textVec)
+      | YANK str => (yank str; drawState)
+    end
+
+  fun consumeEventsLoop (pos, msgVec, drawState, window) =
+    if pos = Vector.length msgVec then
+      drawState
+    else
+      let
+        val msg = Vector.sub (msgVec, pos)
+        val drawState = consumeEvent (drawState, window, msg)
+      in
+        consumeEventsLoop (pos + 1, msgVec, drawState, window)
+      end
+
+  fun consumeEvents (drawState, window) =
+    consumeEventsLoop (0, DrawMailbox.getMessagesAndClear (), drawState, window)
+
+  fun loop (window, app, drawState) =
     if Rgfw.shouldCloseWindow window then
       Rgfw.closeWindow window
     else
@@ -10,9 +38,10 @@ struct
 
         val app = Updater.update app
 
+        val () = GlDraw.draw drawState
         val () = Rgfw.swapBuffers window
       in
-        loop (window, app)
+        loop (window, app, drawState)
       end
 
   local
@@ -46,9 +75,11 @@ struct
       val io = TextIO.openIn "temp.txt"
       val lineGap = ioToLineGap (io, LineGap.empty)
       val _ = TextIO.closeIn io
+
       val app = AppType.init (lineGap, 1920, 1080, Time.now ())
+      val drawState = GlDraw.create ()
     in
-      loop (window, app)
+      loop (window, app, drawState)
     end
 end
 

todo.md

@@ -1,7 +1,6 @@
 # To-do list
 - Bind functions from RGFW (alternative back-end/window library) and have an option to use it
-  - Add key callbacks, resize callbacks, etc.
+  - Add callbacks so we can react to events. (Start by adding key callbacks.)
-  - Consume msgs stores in app
 - Bind gamepad functions from GLFW
 - Modify deletion functions to use `PersistentVector.delete` 
 - Implement 'yj' motion and add tests for it