Show animated previews for GIFs in SendFilesBox.

Telegram/SourceFiles/boxes/send_files_box.cpp

@@ -123,6 +123,8 @@ void SendFilesBox::prepareSingleFileLayout() {
 			image = Images::prepareOpaque(std::move(image));
 			_preview = App::pixmapFromImageInPlace(std::move(image));
 			_preview.setDevicePixelRatio(cRetinaFactor());
+
+			prepareGifPreview();
 		}
 	}
 	if (_preview.isNull()) {
@@ -130,6 +132,49 @@ void SendFilesBox::prepareSingleFileLayout() {
 	}
 }
 
+void SendFilesBox::prepareGifPreview() {
+	auto createGifPreview = [this] {
+		if (!_information) {
+			return false;
+		}
+		if (auto video = base::get_if<FileLoadTask::Video>(&_information->media)) {
+			return video->isGifv;
+		}
+		// Plain old .gif animation.
+		return _animated;
+	};
+	if (createGifPreview()) {
+		_gifPreview = Media::Clip::MakeReader(FileLocation(_files.front()), QByteArray(), [this](Media::Clip::Notification notification) {
+			clipCallback(notification);
+		});
+		if (_gifPreview) _gifPreview->setAutoplay();
+	}
+}
+
+void SendFilesBox::clipCallback(Media::Clip::Notification notification) {
+	using namespace Media::Clip;
+	switch (notification) {
+	case NotificationReinit: {
+		if (_gifPreview && _gifPreview->state() == State::Error) {
+			_gifPreview.setBad();
+		}
+
+		if (_gifPreview && _gifPreview->ready() && !_gifPreview->started()) {
+			auto s = QSize(_previewWidth, _previewHeight);
+			_gifPreview->start(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None);
+		}
+
+		update();
+	} break;
+
+	case NotificationRepaint: {
+		if (_gifPreview && !_gifPreview->currentDisplayed()) {
+			update();
+		}
+	} break;
+	}
+}
+
 void SendFilesBox::prepareDocumentLayout() {
 	auto filepath = _files.front();
 	if (filepath.isEmpty()) {
@@ -283,8 +328,14 @@ void SendFilesBox::paintEvent(QPaintEvent *e) {
 		if (_previewLeft + _previewWidth < width() - st::boxPhotoPadding.right()) {
 			p.fillRect(_previewLeft + _previewWidth, st::boxPhotoPadding.top(), width() - st::boxPhotoPadding.right() - _previewLeft - _previewWidth, _previewHeight, st::confirmBg);
 		}
-		p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), _preview);
+		if (_gifPreview && _gifPreview->started()) {
-		if (_animated) {
+			auto s = QSize(_previewWidth, _previewHeight);
+			auto frame = _gifPreview->current(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None, getms());
+			p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), frame);
+		} else {
+			p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), _preview);
+		}
+		if (_animated && !_gifPreview) {
 			auto inner = QRect(_previewLeft + (_previewWidth - st::msgFileSize) / 2, st::boxPhotoPadding.top() + (_previewHeight - st::msgFileSize) / 2, st::msgFileSize, st::msgFileSize);
 			p.setPen(Qt::NoPen);
 			p.setBrush(st::msgDateImgBg);
@@ -400,9 +451,9 @@ EditCaptionBox::EditCaptionBox(QWidget*, HistoryItem *msg)
 	QSize dimensions;
 	ImagePtr image;
 	QString caption;
-	DocumentData *doc = 0;
+	DocumentData *doc = nullptr;
-	if (HistoryMedia *media = msg->getMedia()) {
+	if (auto media = msg->getMedia()) {
-		HistoryMediaType t = media->type();
+		auto t = media->type();
 		switch (t) {
 		case MediaTypeGif: {
 			_animated = true;
@@ -480,6 +531,7 @@ EditCaptionBox::EditCaptionBox(QWidget*, HistoryItem *msg)
 				}
 			}
 			_thumb = image->pixNoCache(maxW * cIntRetinaFactor(), maxH * cIntRetinaFactor(), Images::Option::Smooth | Images::Option::Blurred, maxW, maxH);
+			prepareGifPreview(doc);
 		} else {
 			maxW = dimensions.width();
 			maxH = dimensions.height();
@@ -520,6 +572,42 @@ EditCaptionBox::EditCaptionBox(QWidget*, HistoryItem *msg)
 	}
 }
 
+void EditCaptionBox::prepareGifPreview(DocumentData *document) {
+	auto createGifPreview = [document] {
+		return (document && document->isAnimation());
+	};
+	if (createGifPreview()) {
+		_gifPreview = Media::Clip::MakeReader(document->location(), document->data(), [this](Media::Clip::Notification notification) {
+			clipCallback(notification);
+		});
+		if (_gifPreview) _gifPreview->setAutoplay();
+	}
+}
+
+void EditCaptionBox::clipCallback(Media::Clip::Notification notification) {
+	using namespace Media::Clip;
+	switch (notification) {
+	case NotificationReinit: {
+		if (_gifPreview && _gifPreview->state() == State::Error) {
+			_gifPreview.setBad();
+		}
+
+		if (_gifPreview && _gifPreview->ready() && !_gifPreview->started()) {
+			auto s = QSize(_thumbw, _thumbh);
+			_gifPreview->start(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None);
+		}
+
+		update();
+	} break;
+
+	case NotificationRepaint: {
+		if (_gifPreview && !_gifPreview->currentDisplayed()) {
+			update();
+		}
+	} break;
+	}
+}
+
 bool EditCaptionBox::canEdit(HistoryItem *message) {
 	if (auto media = message->getMedia()) {
 		switch (media->type()) {
@@ -580,8 +668,14 @@ void EditCaptionBox::paintEvent(QPaintEvent *e) {
 		if (_thumbx + _thumbw < width() - st::boxPhotoPadding.right()) {
 			p.fillRect(_thumbx + _thumbw, st::boxPhotoPadding.top(), width() - st::boxPhotoPadding.right() - _thumbx - _thumbw, _thumbh, st::confirmBg);
 		}
-		p.drawPixmap(_thumbx, st::boxPhotoPadding.top(), _thumb);
+		if (_gifPreview && _gifPreview->started()) {
-		if (_animated) {
+			auto s = QSize(_thumbw, _thumbh);
+			auto frame = _gifPreview->current(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None, getms());
+			p.drawPixmap(_thumbx, st::boxPhotoPadding.top(), frame);
+		} else {
+			p.drawPixmap(_thumbx, st::boxPhotoPadding.top(), _thumb);
+		}
+		if (_animated && !_gifPreview) {
 			QRect inner(_thumbx + (_thumbw - st::msgFileSize) / 2, st::boxPhotoPadding.top() + (_thumbh - st::msgFileSize) / 2, st::msgFileSize, st::msgFileSize);
 			p.setPen(Qt::NoPen);
 			p.setBrush(st::msgDateImgBg);

Telegram/SourceFiles/boxes/send_files_box.h

@@ -66,6 +66,8 @@ private:
 	void prepareSingleFileLayout();
 	void prepareDocumentLayout();
 	void tryToReadSingleFile();
+	void prepareGifPreview();
+	void clipCallback(Media::Clip::Notification notification);
 
 	void updateTitleText();
 	void updateBoxSize();
@@ -84,6 +86,7 @@ private:
 	int _previewLeft = 0;
 	int _previewWidth = 0;
 	int _previewHeight = 0;
+	Media::Clip::ReaderPointer _gifPreview;
 
 	QPixmap _fileThumb;
 	Text _nameText;
@@ -131,6 +134,8 @@ protected:
 
 private:
 	void updateBoxSize();
+	void prepareGifPreview(DocumentData *document);
+	void clipCallback(Media::Clip::Notification notification);
 
 	void saveDone(const MTPUpdates &updates);
 	bool saveFail(const RPCError &error);
@@ -141,6 +146,7 @@ private:
 	bool _doc = false;
 
 	QPixmap _thumb;
+	Media::Clip::ReaderPointer _gifPreview;
 
 	object_ptr<Ui::InputArea> _field = { nullptr };