MODULE test_demos ;

(*
   m2-GTK4 test - the m2 gtk-demo registry (demos/).  Checks that the
   registry is populated and that every demo can be built and torn down.
   Requires a display.
*)

FROM GtkApplication IMPORT gtk_application_new;
FROM Gio IMPORT g_application_run, g_application_quit;
FROM GtkDemo IMPORT Count, TitleOf, KeywordsOf, BuildByTitle;
FROM GtkUtils IMPORT Connect;
FROM SYSTEM IMPORT ADDRESS, ADR;
FROM libc IMPORT printf;

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

VAR
   app: ADDRESS;
   failures: INTEGER;

PROCEDURE StrEqual (a, b: ARRAY OF CHAR) : BOOLEAN;
VAR
   i: CARDINAL;
BEGIN
   i := 0;
   WHILE (a[i] # 0C) AND (b[i] # 0C) DO
      IF a[i] # b[i] THEN RETURN FALSE END;
      INC(i)
   END;
   RETURN a[i] = b[i]
END StrEqual;

PROCEDURE Check (cond: BOOLEAN; msg: ARRAY OF CHAR);
BEGIN
   IF cond THEN
      printf("  ok - %s\n", msg)
   ELSE
      printf("  NOT OK - %s\n", msg);
      INC(failures)
   END
END Check;

(* build a demo once (creates + shows its window), then toggle it off. *)
PROCEDURE BuildAndClose (title: ARRAY OF CHAR);
VAR
   w: ADDRESS;
BEGIN
   w := BuildByTitle(title, NIL);
   Check(w # NIL, title);
   IF w # NIL THEN
      w := BuildByTitle(title, NIL)
   END
END BuildAndClose;

PROCEDURE OnActivate (application: ADDRESS; data: ADDRESS);
VAR
   t, kw: ARRAY [0..127] OF CHAR;
BEGIN
   failures := 0;

   Check(Count() = 5, "registry reports 5 demos");
   TitleOf(0, t);
   Check(StrEqual(t, "Links"), "demo 0 is 'Links'");
   KeywordsOf(0, kw);
   Check(NOT StrEqual(kw, ""), "demo 0 has search keywords");
   Check(BuildByTitle("NoSuchDemo", NIL) = NIL, "unknown demo yields NIL");

   BuildAndClose("Links");
   BuildAndClose("List Box");
   BuildAndClose("Flow Box");
   BuildAndClose("Expander");
   BuildAndClose("CSS Basics");

   IF failures = 0 THEN
      printf("test_demos: PASS\n")
   ELSE
      printf("test_demos: FAIL (%d)\n", failures)
   END;
   g_application_quit(application)
END OnActivate;

VAR
   rc: INTEGER;
BEGIN
   failures := 1;   (* set to 0 by OnActivate; stays 1 if it never runs *)
   app := gtk_application_new(AppId, 0);
   IF app = NIL THEN
      printf("test_demos: FAIL (no app)\n");
      HALT(1)
   END;
   Connect(app, "activate", ADR(OnActivate), NIL);
   rc := g_application_run(app, 0, NIL);
   IF failures = 0 THEN
      HALT(0)
   ELSE
      HALT(1)
   END
END test_demos.