remove more forms.h cruft

[lyx.git] / src / graphics / GraphicsCacheItem.C

diff --git a/src/graphics/GraphicsCacheItem.C b/src/graphics/GraphicsCacheItem.C
index 172c2e33bb0dc74d88078359e94fed1c2b7aa62d..8a066ff5ff58ebda8c8163b5deb5393747b2e97a 100644 (file)
--- a/src/graphics/GraphicsCacheItem.C
+++ b/src/graphics/GraphicsCacheItem.C
@@ -1,18 +1,154 @@
-// -*- C++ -*-
 /* This file is part of
  * =================================================
  * 
  *          LyX, The Document Processor
  *          Copyright 1995 Matthias Ettrich.
- *          Copyright 1995-2000 The LyX Team.
+ *          Copyright 1995-2001 The LyX Team.
  *
  *          This file Copyright 2000 Baruch Even
  * ================================================= */
 
+#include <config.h>
+
 #ifdef __GNUG__
 #pragma implementation
 #endif
 
-#include <config.h>
-#include "GraphicsCacheItem.h"
+#include "graphics/GraphicsCache.h"
+#include "graphics/GraphicsCacheItem.h"
+#include "frontends/support/LyXImage.h"
+#include "graphics/ImageLoaderXPM.h"
+#include "converter.h"
+#include "support/filetools.h"
+#include "support/lyxlib.h"
+#include "lyx_gui_misc.h"
+#include "debug.h"
+#include "support/LAssert.h"
+#include "gettext.h"
+
+using std::endl;
+
+GraphicsCacheItem::GraphicsCacheItem(string const & filename)
+       : imageStatus_(GraphicsCacheItem::Loading)
+{
+       filename_ = filename;
+       
+       bool success = convertImage(filename);
+       // For now we do it synchronously
+       if (success) 
+               imageConverted(0);
+       else
+               imageStatus_ = ErrorConverting;
+}
+
+
+GraphicsCacheItem::~GraphicsCacheItem()
+{}
+
+
+GraphicsCacheItem::ImageStatus 
+GraphicsCacheItem::getImageStatus() const { return imageStatus_; }
+
+
+LyXImage * 
+GraphicsCacheItem::getImage() const { return image_.get(); }
+
+
+void
+GraphicsCacheItem::imageConverted(int retval)
+{
+       lyxerr << "imageConverted, retval=" << retval << endl;
+
+       if (retval) {
+               lyxerr << "(GraphicsCacheItem::imageConverter) "
+                       "Error converting image." << endl;
+               imageStatus_ = GraphicsCacheItem::ErrorConverting;
+               return;
+       }
+
+       // Do the actual image loading from file to memory.
+       loadImage();    
+}
+
+
+namespace {
+
+string const findTargetFormat(string const & from)
+{
+       typedef ImageLoader::FormatList FormatList;
+       FormatList formats = ImageLoaderXPM().loadableFormats();
+       lyx::Assert(formats.size() > 0); // There must be a format to load from.
+       
+       FormatList::const_iterator iter = formats.begin();
+       FormatList::const_iterator end  = formats.end();
+
+       for (; iter != end; ++iter) {
+               if (converters.IsReachable(from, *iter))
+                       break;
+       }
+       if (iter == end) {
+               // We do not know how to convert the image to something loadable.
+               lyxerr << "ERROR: Do not know how to convert image." << std::endl;
+
+               string const first(_("Cannot convert image to display format"));
+               string const second1(_("Need converter from "));
+               string const second2(_(" to "));
+               string const second(second1 + from + second2 + formats[0]);
+
+               WriteAlert(first, second);
+               
+               return string();
+       }
+
+       return (*iter);
+}
+
+} // anon namespace
+
+       
+bool
+GraphicsCacheItem::convertImage(string const & filename)
+{
+       string const from = GetExtension(filename);
+       string const to = findTargetFormat(from);
+       if (to.empty()) 
+               return false;
+       
+       // Take only the filename part of the file, without path or extension.
+       string temp = OnlyFilename(filename);
+       temp = ChangeExtension(filename, string());
+       
+       // Add some stuff to have it a unique temp file.
+       // This tempfile is deleted in loadImage after it is loaded to memory.
+       tempfile = lyx::tempName(string(), temp);
+       // Remove the temp file, we only want the name...
+       lyx::unlink(tempfile);
+
+       converters.Convert(0, filename, tempfile, from, to);
+
+       return true;
+}
+
+
+// This function gets called from the callback after the image has been
+// converted successfully.
+void
+GraphicsCacheItem::loadImage()
+{
+       lyxerr << "Loading XPM Image... ";
+
+       ImageLoaderXPM imageLoader;
+       if (imageLoader.loadImage(tempfile) == ImageLoader::OK) {
+               lyxerr << "Success." << endl;
+               image_.reset(imageLoader.getImage());
+               imageStatus_ = GraphicsCacheItem::Loaded;
+       } else {
+               lyxerr << "Loading " << tempfile << "Failed" << endl;
+               imageStatus_ = GraphicsCacheItem::ErrorReading;
+       }
 
+       // remove the xpm file now.
+       lyx::unlink(tempfile);
+       // and remove the reference to the filename.
+       tempfile = string();
+}