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9475f44966
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@7654 a592a061-630c-0410-9148-cb99ea01b6c8
119 lines
2.2 KiB
C
119 lines
2.2 KiB
C
/**
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* \file LoaderQueue.C
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Alfredo Braunstein
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "LoaderQueue.h"
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#include "GraphicsCacheItem.h"
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#include "debug.h"
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#include <boost/bind.hpp>
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using std::endl;
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using std::list;
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namespace lyx {
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namespace graphics {
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int LoaderQueue::s_numimages_ = 5;
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int LoaderQueue::s_millisecs_ = 500;
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LoaderQueue & LoaderQueue::get()
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{
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static LoaderQueue singleton;
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return singleton;
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}
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void LoaderQueue::loadNext()
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{
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lyxerr[Debug::GRAPHICS] << "LoaderQueue: "
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<< cache_queue_.size()
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<< " items in the queue" << endl;
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int counter = s_numimages_;
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while (cache_queue_.size() && counter--) {
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Cache::ItemPtr ptr = cache_queue_.front();
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cache_set_.erase(ptr);
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cache_queue_.pop_front();
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if (ptr->status() == WaitingToLoad)
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ptr->startLoading();
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}
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if (cache_queue_.size()) {
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startLoader();
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} else {
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stopLoader();
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}
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}
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void LoaderQueue::setPriority(int numimages , int millisecs)
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{
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s_numimages_ = numimages;
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s_millisecs_ = millisecs;
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lyxerr[Debug::GRAPHICS] << "LoaderQueue: priority set to "
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<< s_numimages_ << " images at a time, "
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<< s_millisecs_ << " milliseconds between calls"
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<< endl;
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}
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LoaderQueue::LoaderQueue() : timer(s_millisecs_, Timeout::ONETIME),
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running_(false)
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{
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timer.timeout.connect(boost::bind(&LoaderQueue::loadNext, this));
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}
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void LoaderQueue::startLoader()
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{
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lyxerr[Debug::GRAPHICS] << "LoaderQueue: waking up" << endl;
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running_ = true ;
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timer.setTimeout(s_millisecs_);
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timer.start();
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}
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void LoaderQueue::stopLoader()
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{
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timer.stop();
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running_ = false ;
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lyxerr[Debug::GRAPHICS] << "LoaderQueue: I'm going to sleep" << endl;
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}
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bool LoaderQueue::running() const
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{
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return running_ ;
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}
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void LoaderQueue::touch(Cache::ItemPtr const & item)
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{
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if (! cache_set_.insert(item).second) {
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list<Cache::ItemPtr>::iterator
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it = cache_queue_.begin();
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list<Cache::ItemPtr>::iterator
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end = cache_queue_.end();
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it = std::find(it, end, item);
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if (it != end)
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cache_queue_.erase(it);
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}
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cache_queue_.push_front(item);
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if (!running_)
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startLoader();
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}
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} // namespace graphics
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} // namespace lyx
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