Move out the avatar code from User

Avatars are also a property of rooms, and the supporting code is basically
the same. The only thing different will be emitted signals, and the cleanest
thing to support that (aside from making Avatar a QObject) seems to be to
parameterise the thumbnail-updating logic with a continuation invoked upon
completion of the thumbnail job.

1 files changed, 80 insertions, 0 deletions

diff --git a/avatar.cpp b/avatar.cpp
new file mode 100644
index 00000000..0ce9210b
--- /dev/null
+++ b/avatar.cpp
@@ -0,0 +1,80 @@
+/******************************************************************************
+ * Copyright (C) 2017 Kitsune Ral <kitsune-ral@users.sf.net>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "avatar.h"
+
+#include "jobs/mediathumbnailjob.h"
+#include "events/eventcontent.h"
+#include "connection.h"
+
+using namespace QMatrixClient;
+
+QPixmap Avatar::get(int width, int height, std::function<void()> continuation)
+{
+    QSize size(width, height);
+
+    // FIXME: Alternating between longer-width and longer-height requests
+    // is a sure way to trick the below code into constantly getting another
+    // image from the server because the existing one is alleged unsatisfactory.
+    // This is plain abuse by the client, though; so not critical for now.
+    if( (!_valid && _url.isValid() && !_ongoingRequest)
+        || width > _requestedSize.width()
+        || height > _requestedSize.height() )
+    {
+        qCDebug(MAIN) << "Getting avatar from" << _url.toString();
+        _requestedSize = size;
+        _ongoingRequest = _connection->callApi<MediaThumbnailJob>(_url, size);
+        _ongoingRequest->connect( _ongoingRequest, &MediaThumbnailJob::finished,
+                                 _connection, [=]() {
+            if (_ongoingRequest->status().good())
+            {
+                _valid = true;
+                _originalPixmap = _ongoingRequest->scaledThumbnail(_requestedSize);
+                _scaledPixmaps.clear();
+                continuation();
+            }
+            _ongoingRequest = nullptr;
+        });
+    }
+
+    if( _originalPixmap.isNull() )
+    {
+        if (_defaultIcon.isNull())
+            return _originalPixmap;
+
+        _originalPixmap = _defaultIcon.pixmap(size);
+    }
+
+    auto& pixmap = _scaledPixmaps[{width, height}]; // Create if needed
+    if (pixmap.isNull())
+    {
+        pixmap = _originalPixmap.scaled(size,
+                    Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    }
+    return pixmap;
+}
+
+bool Avatar::updateUrl(const QUrl& newUrl)
+{
+    if (newUrl == _url)
+        return false;
+
+    _url = newUrl;
+    _valid = false;
+    return true;
+}