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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/uno/Any.hxx>
26 #include <com/sun/star/uno/Reference.hxx>
27 #include <com/sun/star/uno/RuntimeException.hpp>
28 #include <com/sun/star/uno/Sequence.hxx>
29 #include <comphelper/processfactory.hxx>
30 #include <rtl/ustring.hxx>
31 #include <vcl/svapp.hxx>
32 
33 #include "lookupcolorname.hxx"
34 #include <unordered_map>
35 
36 namespace
37 {
38 class ColorNameMap
39 {
40 public:
41     ColorNameMap();
42     ColorNameMap(const ColorNameMap&) = delete;
43     ColorNameMap& operator=(const ColorNameMap&) = delete;
44 
45     OUString lookUp(tools::Long color) const;
46 
47 private:
48     typedef std::unordered_map<tools::Long, OUString> Map;
49 
50     Map map_;
51 };
52 
ColorNameMap()53 ColorNameMap::ColorNameMap()
54 {
55     css::uno::Sequence<OUString> aNames;
56     css::uno::Reference<css::container::XNameAccess> xNA;
57 
58     try
59     {
60         // Create color table in which to look up the given color.
61         css::uno::Reference<css::container::XNameContainer> xColorTable
62             = css::drawing::ColorTable::create(comphelper::getProcessComponentContext());
63 
64         // Get list of color names in order to iterate over the color table.
65 
66         // Lock the solar mutex here as workaround for missing lock in
67         // called function.
68         SolarMutexGuard aGuard;
69         xNA = xColorTable;
70         aNames = xColorTable->getElementNames();
71     }
72     catch (css::uno::RuntimeException const&)
73     {
74         // When an exception occurred then we have an empty name sequence
75         // and the loop below is not entered.
76     }
77 
78     // Fill the map to convert from numerical color values to names.
79     if (!xNA.is())
80         return;
81 
82     for (const auto& rName : std::as_const(aNames))
83     {
84         // Get the numerical value for the i-th color name.
85         try
86         {
87             css::uno::Any aColor = xNA->getByName(rName);
88             tools::Long nColor = 0;
89             aColor >>= nColor;
90             map_[nColor] = rName;
91         }
92         catch (css::uno::RuntimeException const&)
93         {
94             // Ignore the exception: the color who lead to the exception
95             // is not included into the map.
96         }
97     }
98 }
99 
lookUp(tools::Long color) const100 OUString ColorNameMap::lookUp(tools::Long color) const
101 {
102     Map::const_iterator i(map_.find(color));
103     if (i != map_.end())
104     {
105         return i->second;
106     }
107     // Did not find the given color; return its RGB tuple representation:
108     return "#" + OUString::number(color, 16);
109 }
110 
111 struct theColorNameMap : public rtl::Static<ColorNameMap, theColorNameMap>
112 {
113 };
114 }
115 
116 namespace accessibility
117 {
lookUpColorName(tools::Long color)118 OUString lookUpColorName(tools::Long color) { return theColorNameMap::get().lookUp(color); }
119 }
120 
121 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
122