MODULE spelling ;

(*
   m2-GTK4 example - a GtkSourceView 5 editor with libspelling
   spell-checking attached to its buffer:

     GtkApplicationWindow > GtkScrolledWindow > GtkSourceView
       buffer <- SpellingTextBufferAdapter <- SpellingChecker

   Build:  make examples
   Run:    ./build/examples/spelling
*)

FROM Gio IMPORT g_application_run;
FROM GtkApplication IMPORT gtk_application_new;
FROM GtkWindow IMPORT gtk_application_window_new, gtk_window_set_title,
   gtk_window_set_default_size, gtk_window_set_child, gtk_window_present;
FROM GtkScrolledWindow IMPORT gtk_scrolled_window_new,
   gtk_scrolled_window_set_child;
FROM GtkWidget IMPORT gtk_widget_set_vexpand;
FROM GtkTextBuffer IMPORT gtk_text_buffer_set_text;
FROM GtkUtils IMPORT Connect;
FROM GtkSourceFunctions IMPORT gtk_source_init;
FROM GtkSourceBuffer IMPORT gtk_source_buffer_new;
FROM GtkSourceView IMPORT gtk_source_view_new_with_buffer,
   gtk_source_view_set_show_line_numbers;
FROM SpellingFunctions IMPORT spelling_init;
FROM SpellingChecker IMPORT spelling_checker_get_default;
FROM SpellingTextBufferAdapter IMPORT spelling_text_buffer_adapter_new;
FROM SYSTEM IMPORT ADDRESS, ADR;
FROM libc IMPORT printf;

CONST
   AppId = "org.example.m2gtk4.Spelling";

   Sample =
"Spell checking is attatched to this bufer and underlines misspeled words.\n" +
"Right-click (or press the menu key) on a underlined word to see the\n" +
"corrections offered by the default libspelling provider.\n";

PROCEDURE OnActivate (application: ADDRESS; data: ADDRESS);
VAR
   window, sw, view, buffer, checker, adapter: ADDRESS;
BEGIN
   buffer := gtk_source_buffer_new(NIL);
   gtk_text_buffer_set_text(buffer, Sample, -1);

   checker := spelling_checker_get_default();
   IF checker # NIL THEN
      adapter := spelling_text_buffer_adapter_new(buffer, checker)
   END;

   view := gtk_source_view_new_with_buffer(buffer);
   gtk_source_view_set_show_line_numbers(view, 1);

   sw := gtk_scrolled_window_new();
   gtk_scrolled_window_set_child(sw, view);
   gtk_widget_set_vexpand(sw, 1);

   window := gtk_application_window_new(application);
   gtk_window_set_title(window, "m2-GTK4 - libspelling");
   gtk_window_set_default_size(window, 600, 400);
   gtk_window_set_child(window, sw);
   gtk_window_present(window)
END OnActivate;

VAR
   app: ADDRESS;
BEGIN
   gtk_source_init();
   spelling_init();
   app := gtk_application_new(AppId, 0);
   IF app = NIL THEN
      printf("gtk_application_new failed\n");
      HALT(1)
   END;
   Connect(app, "activate", ADR(OnActivate), NIL);
   g_application_run(app, 0, NIL)
END spelling.