1 files changed, 121 insertions, 0 deletions
diff --git a/svx/source/accessibility/lookupcolorname.cxx b/svx/source/accessibility/lookupcolorname.cxx
new file mode 100644
index 000000000..373dae469
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+++ b/svx/source/accessibility/lookupcolorname.cxx
@@ -0,0 +1,121 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * 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/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <sal/config.h>
+
+#include <com/sun/star/container/XNameAccess.hpp>
+#include <com/sun/star/container/XNameContainer.hpp>
+#include <com/sun/star/drawing/ColorTable.hpp>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/uno/RuntimeException.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <comphelper/processfactory.hxx>
+#include <rtl/ustring.hxx>
+#include <vcl/svapp.hxx>
+
+#include "lookupcolorname.hxx"
+#include <unordered_map>
+
+namespace
+{
+class ColorNameMap
+{
+public:
+    ColorNameMap();
+    ColorNameMap(const ColorNameMap&) = delete;
+    ColorNameMap& operator=(const ColorNameMap&) = delete;
+
+    OUString lookUp(tools::Long color) const;
+
+private:
+    typedef std::unordered_map<tools::Long, OUString> Map;
+
+    Map map_;
+};
+
+ColorNameMap::ColorNameMap()
+{
+    css::uno::Sequence<OUString> aNames;
+    css::uno::Reference<css::container::XNameAccess> xNA;
+
+    try
+    {
+        // Create color table in which to look up the given color.
+        css::uno::Reference<css::container::XNameContainer> xColorTable
+            = css::drawing::ColorTable::create(comphelper::getProcessComponentContext());
+
+        // Get list of color names in order to iterate over the color table.
+
+        // Lock the solar mutex here as workaround for missing lock in
+        // called function.
+        SolarMutexGuard aGuard;
+        xNA = xColorTable;
+        aNames = xColorTable->getElementNames();
+    }
+    catch (css::uno::RuntimeException const&)
+    {
+        // When an exception occurred then we have an empty name sequence
+        // and the loop below is not entered.
+    }
+
+    // Fill the map to convert from numerical color values to names.
+    if (!xNA.is())
+        return;
+
+    for (const auto& rName : std::as_const(aNames))
+    {
+        // Get the numerical value for the i-th color name.
+        try
+        {
+            css::uno::Any aColor = xNA->getByName(rName);
+            tools::Long nColor = 0;
+            aColor >>= nColor;
+            map_[nColor] = rName;
+        }
+        catch (css::uno::RuntimeException const&)
+        {
+            // Ignore the exception: the color who lead to the exception
+            // is not included into the map.
+        }
+    }
+}
+
+OUString ColorNameMap::lookUp(tools::Long color) const
+{
+    Map::const_iterator i(map_.find(color));
+    if (i != map_.end())
+    {
+        return i->second;
+    }
+    // Did not find the given color; return its RGB tuple representation:
+    return "#" + OUString::number(color, 16);
+}
+}
+
+namespace accessibility
+{
+OUString lookUpColorName(tools::Long color)
+{
+    static ColorNameMap theColorNameMap;
+    return theColorNameMap.lookUp(color);
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */