svx/source/accessibility/DGColorNameLookUp.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_svx.hxx"
  33 #include "DGColorNameLookUp.hxx"
  34 #include <com/sun/star/container/XNameContainer.hpp>
  35 #include <com/sun/star/container/XNameAccess.hpp>
  36 #include <com/sun/star/lang/XMultiServiceFactory.hpp>
  37 #include <comphelper/processfactory.hxx>
  38 #include <vos/mutex.hxx>
  39 #include <vcl/svapp.hxx>
  40
  41
  42 using ::rtl::OUString;
  43 using namespace ::com::sun::star;
  44
  45 namespace accessibility {
  46
  47 // Initialize the class instance with NULL.  A true instance is created only
  48 // when the static <member>Instance</member> is called for the first time.
  49 DGColorNameLookUp* DGColorNameLookUp::mpInstance = NULL;
  50
  51 DGColorNameLookUp& DGColorNameLookUp::Instance (void)
  52 {
  53     // Using double check pattern to make sure that exactly one instance of
  54     // the shape type handler is instantiated.
  55     if (mpInstance == NULL)
  56     {
  57         ::vos::OGuard aGuard (::Application::GetSolarMutex());
  58         if (mpInstance == NULL)
  59         {
  60             // Create the single instance of the color name look up.
  61             mpInstance = new DGColorNameLookUp();
  62         }
  63     }
  64
  65     return *mpInstance;
  66 }
  67
  68
  69
  70
  71 OUString DGColorNameLookUp::LookUpColor (long int nColor) const
  72 {
  73     OUString sColorName;
  74     tColorValueToNameMap::const_iterator I;
  75     I = maColorValueToNameMap.find (nColor);
  76     if (I != maColorValueToNameMap.end())
  77         // Found the color value.  Return the associated name.
  78         sColorName = I->second;
  79     else
  80     {
  81         // Did not find the given color.  Append its rgb tuple to the
  82         // description.
  83         ::rtl::OUStringBuffer sNameBuffer;
  84         sNameBuffer.append (sal_Unicode('#'));
  85         sNameBuffer.append (nColor, 16);
  86         sColorName = sNameBuffer.makeStringAndClear();
  87     }
  88     return sColorName;
  89 }
  90
  91
  92
  93
  94 DGColorNameLookUp::DGColorNameLookUp (void)
  95 {
  96     uno::Sequence<OUString> aNames;
  97     uno::Reference<container::XNameAccess> xNA;
  98
  99     try
 100     {
 101         // Create color table in which to look up the given color.
 102         uno::Reference<container::XNameContainer> xColorTable (
 103             ::comphelper::getProcessServiceFactory()->createInstance(
 104                 OUString::createFromAscii("com.sun.star.drawing.ColorTable")),
 105             uno::UNO_QUERY);
 106
 107         // Get list of color names in order to iterate over the color table.
 108         xNA = uno::Reference<container::XNameAccess>(xColorTable, uno::UNO_QUERY);
 109         if (xNA.is())
 110         {
 111             // Look the solar mutex here as workarround for missing lock in
 112             // called function.
 113             ::vos::OGuard aGuard (::Application::GetSolarMutex());
 114             aNames = xNA->getElementNames();
 115         }
 116     }
 117     catch (uno::RuntimeException e)
 118     {
 119         // When an excpetion occured then whe have an empty name sequence
 120         // and the loop below is not entered.
 121     }
 122
 123     // Fill the map to convert from numerical color values to names.
 124     if (xNA.is())
 125         for (long int i=0; i<aNames.getLength(); i++)
 126         {
 127             // Get the numerical value for the i-th color name.
 128             try
 129             {
 130                 uno::Any aColor (xNA->getByName (aNames[i]));
 131                 long nColor = 0;
 132                 aColor >>= nColor;
 133                 maColorValueToNameMap[nColor] = aNames[i];
 134             }
 135             catch (uno::RuntimeException e)
 136             {
 137                 // Ignore the exception: the color who lead to the excpetion
 138                 // is not included into the map.
 139             }
 140         }
 141 }
 142
 143
 144
 145
 146 DGColorNameLookUp::~DGColorNameLookUp (void)
 147 {
 148     maColorValueToNameMap.clear();
 149 }
 150
 151 } // end of namespace accessibility