From a153059b38131f86dc97a79e6390ec6cac5e0515 Mon Sep 17 00:00:00 2001
From: 23rd <23rd@vivaldi.net>
Date: Thu, 22 Jul 2021 20:57:48 +0300
Subject: [PATCH] Added ability to unload not visible GIFs as heavy parts in
 overview.

---
 .../SourceFiles/info/media/info_media_list_widget.cpp |  9 +++++++++
 .../SourceFiles/info/media/info_media_list_widget.h   |  1 +
 Telegram/SourceFiles/overview/overview_layout.cpp     | 11 ++++++++++-
 Telegram/SourceFiles/overview/overview_layout.h       |  1 +
 .../SourceFiles/overview/overview_layout_delegate.h   |  1 +
 5 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/info/media/info_media_list_widget.cpp b/Telegram/SourceFiles/info/media/info_media_list_widget.cpp
index 669d03e95..7495f8d95 100644
--- a/Telegram/SourceFiles/info/media/info_media_list_widget.cpp
+++ b/Telegram/SourceFiles/info/media/info_media_list_widget.cpp
@@ -934,6 +934,15 @@ void ListWidget::unregisterHeavyItem(not_null<const BaseLayout*> item) {
 	}
 }
 
+bool ListWidget::itemVisible(not_null<const BaseLayout*> item) {
+	if (const auto &found = findItemById(GetUniversalId(item))) {
+		const auto geometry = found->geometry;
+		return (geometry.top() < _visibleBottom)
+			&& (geometry.top() + geometry.height() > _visibleTop);
+	}
+	return true;
+}
+
 void ListWidget::openPhoto(not_null<PhotoData*> photo, FullMsgId id) {
 	_controller->parentController()->openPhoto(photo, id);
 }
diff --git a/Telegram/SourceFiles/info/media/info_media_list_widget.h b/Telegram/SourceFiles/info/media/info_media_list_widget.h
index 2a9a678ad..6498c062e 100644
--- a/Telegram/SourceFiles/info/media/info_media_list_widget.h
+++ b/Telegram/SourceFiles/info/media/info_media_list_widget.h
@@ -80,6 +80,7 @@ public:
 	void registerHeavyItem(not_null<const BaseLayout*> item) override;
 	void unregisterHeavyItem(not_null<const BaseLayout*> item) override;
 	void repaintItem(not_null<const BaseLayout*> item) override;
+	bool itemVisible(not_null<const BaseLayout*> item) override;
 
 	void openPhoto(not_null<PhotoData*> photo, FullMsgId id) override;
 	void openDocument(
diff --git a/Telegram/SourceFiles/overview/overview_layout.cpp b/Telegram/SourceFiles/overview/overview_layout.cpp
index bad2a68b4..ff34a9370 100644
--- a/Telegram/SourceFiles/overview/overview_layout.cpp
+++ b/Telegram/SourceFiles/overview/overview_layout.cpp
@@ -1895,7 +1895,8 @@ void Gif::clipCallback(Media::Clip::Notification notification) {
 						height,
 						ImageRoundRadius::None, RectPart::None);
 				}
-			} else if (_gif->autoPausedGif()/* && !context()->inlineItemVisible(this)*/) {
+			} else if (_gif->autoPausedGif()
+					&& !delegate()->itemVisible(this)) {
 				clearHeavyPart();
 			}
 		}
@@ -2057,9 +2058,17 @@ void Gif::ensureDataMediaCreated() const {
 }
 
 void Gif::clearHeavyPart() {
+	_gif.reset();
 	_dataMedia = nullptr;
 }
 
+void Gif::setPosition(int32 position) {
+	ItemBase::setPosition(position);
+	if (position < 0) {
+		_gif.reset();
+	}
+}
+
 float64 Gif::dataProgress() const {
 	ensureDataMediaCreated();
 	return _dataMedia->progress();
diff --git a/Telegram/SourceFiles/overview/overview_layout.h b/Telegram/SourceFiles/overview/overview_layout.h
index 65682f38e..aff7292d7 100644
--- a/Telegram/SourceFiles/overview/overview_layout.h
+++ b/Telegram/SourceFiles/overview/overview_layout.h
@@ -225,6 +225,7 @@ public:
 		StateRequest request) const override;
 
 	void clearHeavyPart() override;
+	void setPosition(int32 position);
 
 protected:
 	float64 dataProgress() const override;
diff --git a/Telegram/SourceFiles/overview/overview_layout_delegate.h b/Telegram/SourceFiles/overview/overview_layout_delegate.h
index a1dcfe5e5..e2fc7717d 100644
--- a/Telegram/SourceFiles/overview/overview_layout_delegate.h
+++ b/Telegram/SourceFiles/overview/overview_layout_delegate.h
@@ -17,6 +17,7 @@ public:
 	virtual void registerHeavyItem(not_null<const ItemBase*> item) = 0;
 	virtual void unregisterHeavyItem(not_null<const ItemBase*> item) = 0;
 	virtual void repaintItem(not_null<const ItemBase*> item) = 0;
+	virtual bool itemVisible(not_null<const ItemBase*> item) = 0;
 
 	virtual void openPhoto(not_null<PhotoData*> photo, FullMsgId id) = 0;
 	virtual void openDocument(