src/graphics/GraphicsCacheItem.C

   1 // -*- C++ -*-
   2 /* This file is part of
   3  * =================================================
   4  *
   5  *          LyX, The Document Processor
   6  *          Copyright 1995 Matthias Ettrich.
   7  *          Copyright 1995-2000 The LyX Team.
   8  *
   9  *          This file Copyright 2000 Baruch Even
  10  * ================================================= */
  11
  12 #include <config.h>
  13
  14 #ifdef __GNUG__
  15 #pragma implementation
  16 #endif
  17
  18 #include "graphics/GraphicsCache.h"
  19 #include "graphics/GraphicsCacheItem.h"
  20 #include "graphics/GraphicsCacheItem_pimpl.h"
  21 #include "frontends/support/LyXImage.h"
  22
  23
  24 GraphicsCacheItem::GraphicsCacheItem()
  25         : pimpl(new GraphicsCacheItem_pimpl)
  26 {
  27         pimpl->refCount = 1;
  28 }
  29
  30
  31 GraphicsCacheItem::~GraphicsCacheItem()
  32 {
  33         destroy();
  34 }
  35
  36
  37 bool
  38 GraphicsCacheItem::setFilename(string const & filename)
  39 {
  40         filename_ = filename;
  41         return pimpl->setFilename(filename);
  42 }
  43
  44
  45 GraphicsCacheItem::GraphicsCacheItem(GraphicsCacheItem const & gci)
  46         : pimpl(0)
  47 {
  48         // copy will set the actual value of the pimpl.
  49         copy(gci);
  50 }
  51
  52 GraphicsCacheItem &
  53 GraphicsCacheItem::operator=(GraphicsCacheItem const & gci)
  54 {
  55         // Are we trying to copy the object onto itself.
  56         if (this == &gci)
  57                 return *this;
  58
  59         // Destroy old copy
  60         destroy();
  61
  62         // And then copy new object.
  63         copy(gci);
  64
  65         return *this;
  66 }
  67
  68 GraphicsCacheItem *
  69 GraphicsCacheItem::Clone() const
  70 {
  71         return new GraphicsCacheItem(*this);
  72 }
  73
  74 void
  75 GraphicsCacheItem::copy(GraphicsCacheItem const & gci)
  76 {
  77         pimpl = gci.pimpl;
  78         ++(pimpl->refCount);
  79 }
  80
  81
  82 void
  83 GraphicsCacheItem::destroy()
  84 {
  85         if (pimpl) {
  86                 --(pimpl->refCount);
  87                 if (pimpl->refCount == 0) {
  88                         {   // We are deleting the pimpl but we want to mark it deleted
  89                                 // even before it is deleted.
  90                                 GraphicsCacheItem_pimpl * temp = pimpl;
  91                                 pimpl = 0;
  92                                 delete temp; temp = 0;
  93                         }
  94                         GraphicsCache * gc = GraphicsCache::getInstance();
  95                         gc->removeFile(filename_);
  96                 }
  97         }
  98 }
  99
 100
 101 GraphicsCacheItem::ImageStatus
 102 GraphicsCacheItem::getImageStatus() const { return pimpl->imageStatus_; }
 103
 104 LyXImage *
 105 GraphicsCacheItem::getImage() const { return pimpl->getImage(); }