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-rw-r--r--akregator/src/fetchqueue.cpp160
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diff --git a/akregator/src/fetchqueue.cpp b/akregator/src/fetchqueue.cpp
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+/*
+ This file is part of Akregator.
+
+ Copyright (C) 2004 Sashmit Bhaduri <smt@vfemail.net>
+ 2005 Frank Osterfeld <frank.osterfeld at kdemail.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ As a special exception, permission is given to link this program
+ with any edition of Qt, and distribute the resulting executable,
+ without including the source code for Qt in the source distribution.
+*/
+
+#include <qvaluelist.h>
+
+#include "akregatorconfig.h"
+#include "fetchqueue.h"
+#include "feed.h"
+#include "treenode.h"
+
+
+namespace Akregator {
+
+class FetchQueue::FetchQueuePrivate
+{
+ public:
+
+ QValueList<Feed*> queuedFeeds;
+ QValueList<Feed*> fetchingFeeds;
+};
+
+
+FetchQueue::FetchQueue(QObject* parent, const char* name): QObject(parent, name), d(new FetchQueuePrivate) {}
+
+
+FetchQueue::~FetchQueue()
+{
+ slotAbort();
+ delete d;
+ d = 0;
+}
+
+void FetchQueue::slotAbort()
+{
+ for (QValueList<Feed*>::Iterator it = d->fetchingFeeds.begin(); it != d->fetchingFeeds.end(); ++it)
+ {
+ disconnectFromFeed(*it);
+ (*it)->slotAbortFetch();
+ }
+ d->fetchingFeeds.clear();
+
+ for (QValueList<Feed*>::Iterator it = d->queuedFeeds.begin(); it != d->queuedFeeds.end(); ++it)
+ {
+ disconnectFromFeed(*it);
+ }
+ d->queuedFeeds.clear();
+
+ emit signalStopped();
+}
+
+void FetchQueue::addFeed(Feed *f)
+{
+ if (!d->queuedFeeds.contains(f) && !d->fetchingFeeds.contains(f))
+ {
+ connectToFeed(f);
+ d->queuedFeeds.append(f);
+ fetchNextFeed();
+ }
+}
+
+void FetchQueue::fetchNextFeed()
+{
+ if (!d->queuedFeeds.isEmpty() && d->fetchingFeeds.count() < Settings::concurrentFetches())
+ {
+ if (d->fetchingFeeds.isEmpty() && d->queuedFeeds.count() == 1)
+ emit signalStarted();
+ Feed* f = *(d->queuedFeeds.begin());
+ d->queuedFeeds.pop_front();
+ d->fetchingFeeds.append(f);
+ f->fetch(false);
+
+ }
+}
+
+void FetchQueue::slotFeedFetched(Feed *f)
+{
+ emit fetched(f);
+ feedDone(f);
+}
+
+void FetchQueue::slotFetchError(Feed *f)
+{
+ emit fetchError(f);
+ feedDone(f);
+}
+
+void FetchQueue::slotFetchAborted(Feed *f)
+{
+ emit fetched(f); // FIXME: better use a signal like signalAborted(Feed*)
+ feedDone(f);
+}
+
+bool FetchQueue::isEmpty() const
+{
+ return d->queuedFeeds.isEmpty() && d->fetchingFeeds.isEmpty();
+}
+
+void FetchQueue::feedDone(Feed *f)
+{
+ disconnectFromFeed(f);
+ d->fetchingFeeds.remove(f);
+ if (isEmpty())
+ emit signalStopped();
+ else
+ fetchNextFeed();
+}
+
+void FetchQueue::connectToFeed(Feed* feed)
+{
+ connect (feed, SIGNAL(fetched(Feed*)), this, SLOT(slotFeedFetched(Feed*)));
+ connect (feed, SIGNAL(fetchError(Feed*)), this, SLOT(slotFetchError(Feed*)));
+ connect (feed, SIGNAL(fetchAborted(Feed*)), this, SLOT(slotFetchAborted(Feed*)));
+ connect (feed, SIGNAL(signalDestroyed(TreeNode*)), this, SLOT(slotNodeDestroyed(TreeNode*)));
+}
+
+void FetchQueue::disconnectFromFeed(Feed* feed)
+{
+ disconnect (feed, SIGNAL(fetched(Feed*)), this, SLOT(slotFeedFetched(Feed*)));
+ disconnect (feed, SIGNAL(fetchError(Feed*)), this, SLOT(slotFetchError(Feed*)));
+ disconnect (feed, SIGNAL(fetchAborted(Feed*)), this, SLOT(slotFetchAborted(Feed*)));
+ disconnect (feed, SIGNAL(signalDestroyed(TreeNode*)), this, SLOT(slotNodeDestroyed(TreeNode*)));
+}
+
+
+void FetchQueue::slotNodeDestroyed(TreeNode* node)
+{
+ Feed* feed = dynamic_cast<Feed*> (node);
+
+ if (feed)
+ {
+ d->fetchingFeeds.remove(feed);
+ d->queuedFeeds.remove(feed);
+ }
+}
+
+} // namespace Akregator
+
+#include "fetchqueue.moc"