src/graphics/Previews.cpp

   1 /**
   2  * \file Previews.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Angus Leeming
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "Previews.h"
  14 #include "PreviewLoader.h"
  15
  16 #include "Buffer.h"
  17 #include "InsetIterator.h"
  18 #include "LyXRC.h"
  19
  20 #include "insets/Inset.h"
  21
  22 using namespace std;
  23
  24 namespace lyx {
  25
  26 namespace graphics {
  27
  28 LyXRC_PreviewStatus Previews::status()
  29 {
  30         return lyxrc.preview;
  31 }
  32
  33
  34 namespace {
  35 typedef boost::shared_ptr<PreviewLoader> PreviewLoaderPtr;
  36 ///
  37 typedef map<Buffer const *, PreviewLoaderPtr> LyxCacheType;
  38 ///
  39 static LyxCacheType preview_cache_;
  40 }
  41
  42
  43 PreviewLoader & Previews::loader(Buffer const & buffer) const
  44 {
  45         LyxCacheType::iterator it = preview_cache_.find(&buffer);
  46
  47         if (it == preview_cache_.end()) {
  48                 PreviewLoaderPtr ptr(new PreviewLoader(buffer));
  49                 preview_cache_[&buffer] = ptr;
  50                 return *ptr.get();
  51         }
  52
  53         return *it->second.get();
  54 }
  55
  56
  57 void Previews::removeLoader(Buffer const & buffer) const
  58 {
  59         LyxCacheType::iterator it = preview_cache_.find(&buffer);
  60
  61         if (it != preview_cache_.end())
  62                 preview_cache_.erase(it);
  63 }
  64
  65
  66 void Previews::generateBufferPreviews(Buffer const & buffer) const
  67 {
  68         PreviewLoader & ploader = loader(buffer);
  69
  70         Inset & inset = buffer.inset();
  71         InsetIterator it = inset_iterator_begin(inset);
  72         InsetIterator const end = inset_iterator_end(inset);
  73
  74         for (; it != end; ++it)
  75                 it->addPreview(ploader);
  76
  77         ploader.startLoading();
  78 }
  79
  80 } // namespace graphics
  81 } // namespace lyx