1 files changed, 160 insertions, 0 deletions
diff --git a/akregator/src/fetchqueue.cpp b/akregator/src/fetchqueue.cpp
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+++ 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"