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lookupcolorname.cxx
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19 
20 #include <sal/config.h>
21 
22 #include <com/sun/star/container/XNameAccess.hpp>
23 #include <com/sun/star/container/XNameContainer.hpp>
24 #include <com/sun/star/drawing/ColorTable.hpp>
25 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
26 #include <com/sun/star/uno/Any.hxx>
27 #include <com/sun/star/uno/Reference.hxx>
28 #include <com/sun/star/uno/RuntimeException.hpp>
29 #include <com/sun/star/uno/Sequence.hxx>
31 #include <rtl/ustring.h>
32 #include <rtl/ustring.hxx>
33 #include <rtl/ustrbuf.hxx>
34 #include <vcl/svapp.hxx>
35 
36 #include "lookupcolorname.hxx"
37 #include <unordered_map>
38 
39 namespace {
40 
41 class ColorNameMap {
42 public:
43  ColorNameMap();
44  ColorNameMap(const ColorNameMap&) = delete;
45  ColorNameMap& operator=(const ColorNameMap&) = delete;
46 
47  OUString lookUp(long color) const;
48 
49 private:
50  typedef std::unordered_map< long, OUString > Map;
51 
52  Map map_;
53 };
54 
55 ColorNameMap::ColorNameMap() {
56  css::uno::Sequence< OUString > aNames;
57  css::uno::Reference< css::container::XNameAccess > xNA;
58 
59  try
60  {
61  // Create color table in which to look up the given color.
62  css::uno::Reference< css::container::XNameContainer > xColorTable =
63  css::drawing::ColorTable::create( comphelper::getProcessComponentContext() );
64 
65  // Get list of color names in order to iterate over the color table.
66 
67  // Lock the solar mutex here as workaround for missing lock in
68  // called function.
69  SolarMutexGuard aGuard;
70  xNA = xColorTable;
71  aNames = xColorTable->getElementNames();
72  }
73  catch (css::uno::RuntimeException const&)
74  {
75  // When an exception occurred then we have an empty name sequence
76  // and the loop below is not entered.
77  }
78 
79  // Fill the map to convert from numerical color values to names.
80  if (xNA.is())
81  for (const auto& rName : std::as_const(aNames))
82  {
83  // Get the numerical value for the i-th color name.
84  try
85  {
86  css::uno::Any aColor = xNA->getByName(rName);
87  long nColor = 0;
88  aColor >>= nColor;
89  map_[nColor] = rName;
90  }
91  catch (css::uno::RuntimeException const&)
92  {
93  // Ignore the exception: the color who lead to the exception
94  // is not included into the map.
95  }
96  }
97 }
98 
99 OUString ColorNameMap::lookUp(long color) const {
100  Map::const_iterator i(map_.find(color));
101  if (i != map_.end()) {
102  return i->second;
103  }
104  // Did not find the given color; return its RGB tuple representation:
105  return "#" + OUString::number(color, 16);
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: */
std::map< OUString, rtl::Reference< Entity > > const & map_
int i
OUString lookUpColorName(long color)
This is a color name lookup targeted to be used by the accessibility DescriptionGenerator
Reference< XComponentContext > getProcessComponentContext()