svx/source/accessibility/lookupcolorname.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "sal/config.h"
  21
  22 #include "boost/noncopyable.hpp"
  23 #include "com/sun/star/container/XNameAccess.hpp"
  24 #include "com/sun/star/container/XNameContainer.hpp"
  25 #include "com/sun/star/drawing/ColorTable.hpp"
  26 #include "com/sun/star/lang/XMultiServiceFactory.hpp"
  27 #include "com/sun/star/uno/Any.hxx"
  28 #include "com/sun/star/uno/Reference.hxx"
  29 #include "com/sun/star/uno/RuntimeException.hpp"
  30 #include "com/sun/star/uno/Sequence.hxx"
  31 #include "comphelper/processfactory.hxx"
  32 #include "rtl/ustring.h"
  33 #include "rtl/ustring.hxx"
  34 #include "vcl/svapp.hxx"
  35
  36 #include <lookupcolorname.hxx>
  37 #include <unordered_map>
  38
  39 namespace {
  40
  41 class ColorNameMap: private boost::noncopyable {
  42 public:
  43     ColorNameMap();
  44
  45     OUString lookUp(long color) const;
  46
  47 private:
  48     typedef std::unordered_map< long, OUString > Map;
  49
  50     Map map_;
  51 };
  52
  53 ColorNameMap::ColorNameMap() {
  54     css::uno::Sequence< OUString > aNames;
  55     css::uno::Reference< css::container::XNameAccess > xNA;
  56
  57     try
  58     {
  59         // Create color table in which to look up the given color.
  60             css::uno::Reference< css::container::XNameContainer > xColorTable =
  61                  css::drawing::ColorTable::create( comphelper::getProcessComponentContext() );
  62
  63         // Get list of color names in order to iterate over the color table.
  64
  65         // Lock the solar mutex here as workaround for missing lock in
  66         // called function.
  67         SolarMutexGuard aGuard;
  68         aNames = xNA->getElementNames();
  69     }
  70     catch (css::uno::RuntimeException const&)
  71     {
  72         // When an exception occurred then whe have an empty name sequence
  73         // and the loop below is not entered.
  74     }
  75
  76     // Fill the map to convert from numerical color values to names.
  77     if (xNA.is())
  78         for (long int i=0; i<aNames.getLength(); i++)
  79         {
  80             // Get the numerical value for the i-th color name.
  81             try
  82             {
  83                 css::uno::Any aColor (xNA->getByName (aNames[i]));
  84                 long nColor = 0;
  85                 aColor >>= nColor;
  86                 map_[nColor] = aNames[i];
  87             }
  88             catch (css::uno::RuntimeException const&)
  89             {
  90                 // Ignore the exception: the color who lead to the exception
  91                 // is not included into the map.
  92             }
  93         }
  94 }
  95
  96 OUString ColorNameMap::lookUp(long color) const {
  97     Map::const_iterator i(map_.find(color));
  98     if (i != map_.end()) {
  99         return i->second;
 100     }
 101     // Did not find the given color; return its RGB tuple representation:
 102     OUStringBuffer buf;
 103     buf.append('#');
 104     buf.append(color, 16);
 105     return buf.makeStringAndClear();
 106 }
 107
 108 struct theColorNameMap: public rtl::Static< ColorNameMap, theColorNameMap > {};
 109
 110 }
 111
 112 namespace accessibility {
 113
 114 OUString lookUpColorName(long color) {
 115     return theColorNameMap::get().lookUp(color);
 116 }
 117
 118 }
 119
 120 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */