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 "boost/unordered_map.hpp"
  24 #include "com/sun/star/container/XNameAccess.hpp"
  25 #include "com/sun/star/container/XNameContainer.hpp"
  26 #include "com/sun/star/drawing/ColorTable.hpp"
  27 #include "com/sun/star/lang/XMultiServiceFactory.hpp"
  28 #include "com/sun/star/uno/Any.hxx"
  29 #include "com/sun/star/uno/Reference.hxx"
  30 #include "com/sun/star/uno/RuntimeException.hpp"
  31 #include "com/sun/star/uno/Sequence.hxx"
  32 #include "comphelper/processfactory.hxx"
  33 #include "rtl/ustring.h"
  34 #include "rtl/ustring.hxx"
  35 #include "vcl/svapp.hxx"
  36
  37 namespace {
  38
  39 class ColorNameMap: private boost::noncopyable {
  40 public:
  41     ColorNameMap();
  42
  43     OUString lookUp(long color) const;
  44
  45 private:
  46     typedef boost::unordered_map< long, OUString > Map;
  47
  48     Map map_;
  49 };
  50
  51 ColorNameMap::ColorNameMap() {
  52     css::uno::Sequence< OUString > aNames;
  53     css::uno::Reference< css::container::XNameAccess > xNA;
  54
  55     try
  56     {
  57         // Create color table in which to look up the given color.
  58             css::uno::Reference< css::container::XNameContainer > xColorTable =
  59                  css::drawing::ColorTable::create( comphelper::getProcessComponentContext() );
  60
  61         // Get list of color names in order to iterate over the color table.
  62
  63         // Lock the solar mutex here as workarround for missing lock in
  64         // called function.
  65         SolarMutexGuard aGuard;
  66         aNames = xNA->getElementNames();
  67     }
  68     catch (css::uno::RuntimeException const&)
  69     {
  70         // When an exception occurred then whe have an empty name sequence
  71         // and the loop below is not entered.
  72     }
  73
  74     // Fill the map to convert from numerical color values to names.
  75     if (xNA.is())
  76         for (long int i=0; i<aNames.getLength(); i++)
  77         {
  78             // Get the numerical value for the i-th color name.
  79             try
  80             {
  81                 css::uno::Any aColor (xNA->getByName (aNames[i]));
  82                 long nColor = 0;
  83                 aColor >>= nColor;
  84                 map_[nColor] = aNames[i];
  85             }
  86             catch (css::uno::RuntimeException const&)
  87             {
  88                 // Ignore the exception: the color who lead to the exception
  89                 // is not included into the map.
  90             }
  91         }
  92 }
  93
  94 OUString ColorNameMap::lookUp(long color) const {
  95     Map::const_iterator i(map_.find(color));
  96     if (i != map_.end()) {
  97         return i->second;
  98     }
  99     // Did not find the given color; return its RGB tuple representation:
 100     OUStringBuffer buf;
 101     buf.append(sal_Unicode('#'));
 102     buf.append(color, 16);
 103     return buf.makeStringAndClear();
 104 }
 105
 106 struct theColorNameMap: public rtl::Static< ColorNameMap, theColorNameMap > {};
 107
 108 }
 109
 110 namespace accessibility {
 111
 112 OUString lookUpColorName(long color) {
 113     return theColorNameMap::get().lookUp(color);
 114 }
 115
 116 }
 117
 118 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */