1 files changed, 103 insertions, 0 deletions
diff --git a/accessible/atk/nsMaiInterfaceValue.cpp b/accessible/atk/nsMaiInterfaceValue.cpp
new file mode 100644
index 0000000000..9a6546d7ae
--- /dev/null
+++ b/accessible/atk/nsMaiInterfaceValue.cpp
@@ -0,0 +1,103 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* 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 "InterfaceInitFuncs.h"
+
+#include "AccessibleWrap.h"
+#include "nsMai.h"
+#include "RemoteAccessible.h"
+#include "mozilla/FloatingPoint.h"
+#include "mozilla/Likely.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+
+extern "C" {
+
+static void getCurrentValueCB(AtkValue* obj, GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(value, 0, sizeof(GValue));
+  double accValue = acc->CurValue();
+  if (IsNaN(accValue)) return;
+
+  g_value_init(value, G_TYPE_DOUBLE);
+  g_value_set_double(value, accValue);
+}
+
+static void getMaximumValueCB(AtkValue* obj, GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(value, 0, sizeof(GValue));
+  double accValue = acc->MaxValue();
+  if (IsNaN(accValue)) return;
+
+  g_value_init(value, G_TYPE_DOUBLE);
+  g_value_set_double(value, accValue);
+}
+
+static void getMinimumValueCB(AtkValue* obj, GValue* value) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(value, 0, sizeof(GValue));
+  double accValue = acc->MinValue();
+  if (IsNaN(accValue)) return;
+
+  g_value_init(value, G_TYPE_DOUBLE);
+  g_value_set_double(value, accValue);
+}
+
+static void getMinimumIncrementCB(AtkValue* obj, GValue* minimumIncrement) {
+  Accessible* acc = GetInternalObj(ATK_OBJECT(obj));
+  if (!acc) {
+    return;
+  }
+
+  memset(minimumIncrement, 0, sizeof(GValue));
+  double accValue = acc->Step();
+  if (IsNaN(accValue)) {
+    accValue = 0;  // zero if the minimum increment is undefined
+  }
+
+  g_value_init(minimumIncrement, G_TYPE_DOUBLE);
+  g_value_set_double(minimumIncrement, accValue);
+}
+
+static gboolean setCurrentValueCB(AtkValue* obj, const GValue* value) {
+  RemoteAccessible* proxy = nullptr;
+  AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(obj));
+  if (!accWrap) {
+    proxy = GetProxy(ATK_OBJECT(obj));
+    if (!proxy) {
+      return FALSE;
+    }
+  }
+
+  double accValue = g_value_get_double(value);
+  return accWrap ? accWrap->SetCurValue(accValue)
+                 : proxy->SetCurValue(accValue);
+}
+}
+
+void valueInterfaceInitCB(AtkValueIface* aIface) {
+  NS_ASSERTION(aIface, "Invalid aIface");
+  if (MOZ_UNLIKELY(!aIface)) return;
+
+  aIface->get_current_value = getCurrentValueCB;
+  aIface->get_maximum_value = getMaximumValueCB;
+  aIface->get_minimum_value = getMinimumValueCB;
+  aIface->get_minimum_increment = getMinimumIncrementCB;
+  aIface->set_current_value = setCurrentValueCB;
+}