Support animated images

fixes #461

1 files changed, 79 insertions, 0 deletions

diff --git a/src/ui/MxcAnimatedImage.h b/src/ui/MxcAnimatedImage.h
new file mode 100644
index 00000000..7b9502e0
--- /dev/null
+++ b/src/ui/MxcAnimatedImage.h
@@ -0,0 +1,79 @@
+// SPDX-FileCopyrightText: 2021 Nheko Contributors
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <QBuffer>
+#include <QMovie>
+#include <QObject>
+#include <QQuickItem>
+
+class TimelineModel;
+
+// This is an AnimatedImage, that can draw encrypted images
+class MxcAnimatedImage : public QQuickItem
+{
+        Q_OBJECT
+        Q_PROPERTY(TimelineModel *roomm READ room WRITE setRoom NOTIFY roomChanged REQUIRED)
+        Q_PROPERTY(QString eventId READ eventId WRITE setEventId NOTIFY eventIdChanged)
+        Q_PROPERTY(bool animatable READ animatable NOTIFY animatableChanged)
+        Q_PROPERTY(bool loaded READ loaded NOTIFY loadedChanged)
+public:
+        MxcAnimatedImage(QQuickItem *parent = nullptr)
+          : QQuickItem(parent)
+        {
+                connect(this, &MxcAnimatedImage::eventIdChanged, &MxcAnimatedImage::startDownload);
+                connect(this, &MxcAnimatedImage::roomChanged, &MxcAnimatedImage::startDownload);
+                connect(&movie, &QMovie::frameChanged, this, &MxcAnimatedImage::newFrame);
+                setFlag(QQuickItem::ItemHasContents);
+                // setAcceptHoverEvents(true);
+        }
+
+        bool animatable() const { return animatable_; }
+        bool loaded() const { return buffer.size() > 0; }
+        QString eventId() const { return eventId_; }
+        TimelineModel *room() const { return room_; }
+        void setEventId(QString newEventId)
+        {
+                if (eventId_ != newEventId) {
+                        eventId_ = newEventId;
+                        emit eventIdChanged();
+                }
+        }
+        void setRoom(TimelineModel *room)
+        {
+                if (room_ != room) {
+                        room_ = room;
+                        emit roomChanged();
+                }
+        }
+
+        QSGNode *updatePaintNode(QSGNode *oldNode,
+                                 QQuickItem::UpdatePaintNodeData *updatePaintNodeData) override;
+
+signals:
+        void roomChanged();
+        void eventIdChanged();
+        void animatableChanged();
+        void loadedChanged();
+
+private slots:
+        void startDownload();
+        void newFrame(int frame)
+        {
+                currentFrame = frame;
+                imageDirty   = true;
+                update();
+        }
+
+private:
+        TimelineModel *room_ = nullptr;
+        QString eventId_;
+        QString filename_;
+        bool animatable_ = false;
+        QBuffer buffer;
+        QMovie movie;
+        int currentFrame = 0;
+        bool imageDirty  = true;
+};