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#include "view/SlsFontProvider.hxx"

#include "controller/SlideSorterController.hxx"

#include <sfx2/app.hxx>
#include <com/sun/star/uno/RuntimeException.hpp>


using namespace ::sd::slidesorter;

namespace sd { namespace slidesorter { namespace view {

FontProvider* FontProvider::mpInstance = NULL;

FontProvider& FontProvider::Instance (void)
{
    if (mpInstance == NULL)
    {
        ::osl::GetGlobalMutex aMutexFunctor;
        ::osl::MutexGuard aGuard (aMutexFunctor());
        if (mpInstance == NULL)
        {
            // Create an instance of the class and register it at the
            // SdGlobalResourceContainer so that it is eventually released.
            FontProvider* pInstance = new FontProvider();
            SdGlobalResourceContainer::Instance().AddResource (
                ::std::auto_ptr<SdGlobalResource>(pInstance));
            OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
            mpInstance = pInstance;
        }
    }
    else
    {
        OSL_DOUBLE_CHECKED_LOCKING_MEMORY_BARRIER();
    }

    // We throw an exception when for some strange reason no instance of
    // this class exists.
    if (mpInstance == NULL)
        throw ::com::sun::star::uno::RuntimeException(::rtl::OUString(
            RTL_CONSTASCII_USTRINGPARAM("com.sun.star.document.IndexedPropertyValues")),
            NULL);

    return *mpInstance;
}




FontProvider::FontProvider (void)
    : maFont(),
      maMapMode()
{
}




FontProvider::~FontProvider (void)
{
}




void FontProvider::Invalidate (void)
{
    maFont.reset();
}




FontProvider::SharedFontPointer FontProvider::GetFont (const OutputDevice& rDevice)
{
    // Reset the font when the map mode has changed since its creation.
    if (maMapMode != rDevice.GetMapMode())
        maFont.reset();

    if (maFont.get() == NULL)
    {
        // Initialize the font from the application style settings.
        maFont.reset(new Font (Application::GetSettings().GetStyleSettings().GetAppFont()));
        maFont->SetTransparent(sal_True);
        maFont->SetWeight(WEIGHT_NORMAL);

        // Transform the point size to pixel size.
        MapMode aFontMapMode (MAP_POINT);
        Size aFontSize (rDevice.LogicToPixel(maFont->GetSize(), aFontMapMode));

        // Transform the font size to the logical coordinates of the device.
        maFont->SetSize (rDevice.PixelToLogic(aFontSize));

        // Remember the map mode of the given device to detect different
        // devices or modified zoom scales on future calls.
        maMapMode = rDevice.GetMapMode();
    }

    return maFont;
}

} } }  // end of namespace ::sd::slidesorter::view

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