1 files changed, 120 insertions, 0 deletions
diff --git a/intl/locale/gtk/OSPreferences_gtk.cpp b/intl/locale/gtk/OSPreferences_gtk.cpp
new file mode 100644
index 0000000000..e7e5d6017d
--- /dev/null
+++ b/intl/locale/gtk/OSPreferences_gtk.cpp
@@ -0,0 +1,120 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <locale.h>
+#include "mozilla/intl/Locale.h"
+#include "OSPreferences.h"
+
+#include "nsServiceManagerUtils.h"
+#include "nsIGSettingsService.h"
+
+using namespace mozilla;
+using namespace mozilla::intl;
+
+OSPreferences::OSPreferences() = default;
+
+bool OSPreferences::ReadSystemLocales(nsTArray<nsCString>& aLocaleList) {
+  MOZ_ASSERT(aLocaleList.IsEmpty());
+
+  nsAutoCString defaultLang(Locale::GetDefaultLocale());
+
+  if (CanonicalizeLanguageTag(defaultLang)) {
+    aLocaleList.AppendElement(defaultLang);
+    return true;
+  }
+  return false;
+}
+
+bool OSPreferences::ReadRegionalPrefsLocales(nsTArray<nsCString>& aLocaleList) {
+  MOZ_ASSERT(aLocaleList.IsEmpty());
+
+  // For now we're just taking the LC_TIME from POSIX environment for all
+  // regional preferences.
+  nsAutoCString localeStr(setlocale(LC_TIME, nullptr));
+
+  if (CanonicalizeLanguageTag(localeStr)) {
+    aLocaleList.AppendElement(localeStr);
+    return true;
+  }
+
+  return false;
+}
+
+/*
+ * This looks up into gtk settings for hourCycle format.
+ *
+ * This works for all GUIs that use gtk settings like Gnome, Elementary etc.
+ *
+ * We're taking the current 12/24h settings irrelevant of the locale, because
+ * in the UI user selects this setting for all locales.
+ */
+static int HourCycle() {
+  nsCOMPtr<nsIGSettingsService> gsettings =
+      do_GetService(NS_GSETTINGSSERVICE_CONTRACTID);
+  if (!gsettings) {
+    return 0;
+  }
+
+  nsCOMPtr<nsIGSettingsCollection> desktop_settings;
+  gsettings->GetCollectionForSchema("org.gnome.desktop.interface"_ns,
+                                    getter_AddRefs(desktop_settings));
+  if (!desktop_settings) {
+    return 0;
+  }
+
+  nsAutoCString result;
+  desktop_settings->GetString("clock-format"_ns, result);
+  if (result == "12h") {
+    return 12;
+  }
+  if (result == "24h") {
+    return 24;
+  }
+  return 0;
+}
+
+/**
+ * Since Gtk does not provide a way to customize or format date/time patterns,
+ * we're reusing ICU data here, but we do modify it according to the only
+ * setting Gtk gives us - hourCycle.
+ *
+ * This means that for gtk we will return a pattern from ICU altered to
+ * represent h12/h24 hour cycle if the user modified the default value.
+ *
+ * In short, this should work like this:
+ *
+ *  * gtk defaults, pl: 24h
+ *  * gtk defaults, en: 12h
+ *
+ *  * gtk 12h, pl: 12h
+ *  * gtk 12h, en: 12h
+ *
+ *  * gtk 24h, pl: 24h
+ *  * gtk 12h, en: 12h
+ */
+bool OSPreferences::ReadDateTimePattern(DateTimeFormatStyle aDateStyle,
+                                        DateTimeFormatStyle aTimeStyle,
+                                        const nsACString& aLocale,
+                                        nsACString& aRetVal) {
+  nsAutoCString skeleton;
+  if (!GetDateTimeSkeletonForStyle(aDateStyle, aTimeStyle, aLocale, skeleton)) {
+    return false;
+  }
+
+  // Customize the skeleton if necessary to reflect user's 12/24hr pref
+  int hourCycle = HourCycle();
+  if (hourCycle == 12 || hourCycle == 24) {
+    OverrideSkeletonHourCycle(hourCycle == 24, skeleton);
+  }
+
+  if (!GetPatternForSkeleton(skeleton, aLocale, aRetVal)) {
+    return false;
+  }
+
+  return true;
+}
+
+void OSPreferences::RemoveObservers() {}