From 1e314dc8c55c94f977b8ea07e5e6e448d13d870f Mon Sep 17 00:00:00 2001
From: Vivien Kraus <vivien@planete-kraus.eu>
Date: Mon, 4 Oct 2021 16:24:42 +0200
Subject: gui: add a function to insert code to run in the main thread

---
 po/POTFILES.in                            |  1 +
 src/scm/webid-oidc/client/gui/Makefile.am |  6 +++--
 src/scm/webid-oidc/client/gui/clock.scm   | 45 +++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 src/scm/webid-oidc/client/gui/clock.scm

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 94d3140..04cbadc 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -44,6 +44,7 @@ src/scm/webid-oidc/client/gui/account-widget.scm
 src/scm/webid-oidc/client/gui/accounts-widget.scm
 src/scm/webid-oidc/client/gui/authorization-prompt.scm
 src/scm/webid-oidc/client/gui/client-widget.scm
+src/scm/webid-oidc/client/gui/clock.scm
 src/scm/webid-oidc/client/gui/settings.scm
 src/scm/webid-oidc/dpop-proof.scm
 src/scm/webid-oidc/errors.scm
diff --git a/src/scm/webid-oidc/client/gui/Makefile.am b/src/scm/webid-oidc/client/gui/Makefile.am
index b6a498d..5e4f4c5 100644
--- a/src/scm/webid-oidc/client/gui/Makefile.am
+++ b/src/scm/webid-oidc/client/gui/Makefile.am
@@ -21,7 +21,8 @@ dist_guiclientwebidoidcmod_DATA += \
   %reldir%/accounts-widget.scm \
   %reldir%/application-hooks.scm \
   %reldir%/application.scm \
-  %reldir%/authorization-prompt.scm
+  %reldir%/authorization-prompt.scm \
+  %reldir%/clock.scm
 
 guiclientwebidoidcgo_DATA += \
   %reldir%/settings.go \
@@ -30,4 +31,5 @@ guiclientwebidoidcgo_DATA += \
   %reldir%/accounts-widget.go \
   %reldir%/application-hooks.go \
   %reldir%/application.go \
-  %reldir%/authorization-prompt.go
+  %reldir%/authorization-prompt.go \
+  %reldir%/clock.go
diff --git a/src/scm/webid-oidc/client/gui/clock.scm b/src/scm/webid-oidc/client/gui/clock.scm
new file mode 100644
index 0000000..efb7ce8
--- /dev/null
+++ b/src/scm/webid-oidc/client/gui/clock.scm
@@ -0,0 +1,45 @@
+;; disfluid, implementation of the Solid specification
+;; Copyright (C) 2021  Vivien Kraus
+
+;; This program is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU Affero General Public License as
+;; published by the Free Software Foundation, either version 3 of the
+;; License, or (at your option) any later version.
+
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU Affero General Public License for more details.
+
+;; You should have received a copy of the GNU Affero General Public License
+;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+(define-module (webid-oidc client gui clock)
+  #:use-module (gi)
+  #:use-module (gi types)
+  #:use-module (gi util)
+  #:use-module (ice-9 atomic)
+  #:use-module (webid-oidc client gui application-hooks)
+  #:declarative? #t
+  #:export (wait))
+
+(use-typelibs ("GLib" "2.0"))
+
+(define pending-ops (make-atomic-box '()))
+
+(define (wait f)
+  (let ((old (atomic-box-ref pending-ops)))
+    (unless (eq? old (atomic-box-compare-and-swap! pending-ops old `(,f ,@old)))
+      (wait f))))
+
+(define (run . _)
+  (let ((old (atomic-box-ref pending-ops)))
+    (if (eq? old (atomic-box-compare-and-swap! pending-ops old '()))
+        (begin
+          (for-each (lambda (f) (f)) (reverse old))
+          #t)
+        (run))))
+
+(add-hook! application-activated-hook
+           (lambda (app)
+             (timeout-add 0 200 run)))
-- 
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