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00e13a6f56
Small fix to GImageXPM. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3616 a592a061-630c-0410-9148-cb99ea01b6c8
167 lines
3.2 KiB
C
167 lines
3.2 KiB
C
/*
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* \file GraphicsCache.C
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* Copyright 2002 the LyX Team
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* Read the file COPYING
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*
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* \author Baruch Even <baruch.even@writeme.com>
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* \author Angus Leeming <a.leeming@ic.ac.uk>
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*/
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#include <config.h>
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#ifdef __GNUG__
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#pragma implementation
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#endif
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#include "GraphicsCache.h"
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#include "GraphicsCacheItem.h"
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#include "GraphicsImage.h"
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#include "GraphicsParams.h"
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#include "insets/insetgraphics.h"
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#include "frontends/Dialogs.h"
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namespace grfx {
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GCache & GCache::get()
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{
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static bool start = true;
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if (start) {
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start = false;
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Dialogs::initialiseGraphics();
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}
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// Now return the cache
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static GCache singleton;
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return singleton;
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}
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GCache::GCache()
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{
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cache = new CacheType;
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}
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// all elements are destroyed by the shared_ptr's in the map.
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GCache::~GCache()
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{
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delete cache;
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}
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void GCache::update(InsetGraphics const & inset)
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{
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// A subset only of InsetGraphicsParams is needed for display purposes.
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// The GraphicsParams c-tor also interrogates lyxrc to ascertain whether
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// to display or not.
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GParams params(inset.params());
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// Each inset can reference only one file, so check the cache for any
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// graphics files referenced by inset. If the name of this file is
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// different from that in params, then remove the reference.
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CacheType::iterator it = find(inset);
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if (it != cache->end()) {
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CacheItemType item = it->second;
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if (item->filename() != params.filename) {
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item->remove(inset);
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if (item->empty())
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cache->erase(it);
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}
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}
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// Are we adding a new file or modifying the display of an existing one?
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it = cache->find(params.filename);
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if (it != cache->end()) {
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it->second->modify(inset, params);
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return;
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}
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CacheItemType item(new GCacheItem(inset, params));
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if (item.get() != 0)
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(*cache)[params.filename] = item;
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}
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void GCache::remove(InsetGraphics const & inset)
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{
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CacheType::iterator it = find(inset);
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if (it == cache->end())
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return;
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CacheItemType item = it->second;
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item->remove(inset);
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if (item->empty()) {
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cache->erase(it);
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}
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}
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void GCache::startLoading(InsetGraphics const & inset)
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{
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CacheType::iterator it = find(inset);
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if (it == cache->end())
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return;
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it->second->startLoading(inset);
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}
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ImagePtr const GCache::image(InsetGraphics const & inset) const
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{
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CacheType::const_iterator it = find(inset);
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if (it == cache->end())
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return ImagePtr();
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return it->second->image(inset);
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}
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ImageStatus GCache::status(InsetGraphics const & inset) const
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{
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CacheType::const_iterator it = find(inset);
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if (it == cache->end())
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return ErrorUnknown;
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return it->second->status(inset);
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}
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void GCache::changeDisplay(bool changed_background)
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{
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CacheType::iterator it = cache->begin();
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CacheType::iterator end = cache->end();
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for(; it != end; ++it)
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it->second->changeDisplay(changed_background);
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}
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GCache::CacheType::iterator
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GCache::find(InsetGraphics const & inset)
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{
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CacheType::iterator it = cache->begin();
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for (; it != cache->end(); ++it) {
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if (it->second->referencedBy(inset))
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return it;
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}
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return cache->end();
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}
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GCache::CacheType::const_iterator
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GCache::find(InsetGraphics const & inset) const
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{
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CacheType::const_iterator it = cache->begin();
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for (; it != cache->end(); ++it) {
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if (it->second->referencedBy(inset))
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return it;
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}
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return cache->end();
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}
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} // namespace grfx
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