mirror of
https://github.com/AyuGram/AyuGramDesktop.git
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23rd
106 lines
2.4 KiB
C++
106 lines
2.4 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include "ui/effects/animations.h"
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#include "base/flat_map.h"
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namespace Main {
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class Session;
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} // namespace Main
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namespace Ui {
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class ThanosEffect;
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class ScrollArea;
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struct ChatPaintContext;
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} // namespace Ui
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namespace HistoryView {
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class Element;
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} // namespace HistoryView
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class HistoryItem;
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namespace Ui {
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struct CollapseGap {
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int absY = -1;
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int height = 0;
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friend bool operator==(const CollapseGap&, const CollapseGap&) = default;
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};
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class ThanosEffectController final {
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public:
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struct Delegate {
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Fn<HistoryView::Element*(not_null<const HistoryItem*>)> viewForItem;
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Fn<int(not_null<const HistoryView::Element*>)> itemTop;
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Fn<int()> visibleAreaTop;
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Fn<int()> visibleAreaBottom;
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Fn<int()> contentWidth;
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Fn<ChatPaintContext(QRect)> preparePaintContext;
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Fn<QWidget*()> window;
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Fn<not_null<ScrollArea*>()> scrollArea;
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Fn<void(int scrollTop)> scrollToY;
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Fn<void(std::vector<CollapseGap>)> setCollapseGaps;
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};
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ThanosEffectController(
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not_null<Main::Session*> session,
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Delegate delegate,
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rpl::lifetime &lifetime);
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~ThanosEffectController();
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void captureOnRemoval(not_null<const HistoryItem*> item);
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void clearPreCaptured();
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[[nodiscard]] const std::vector<CollapseGap> &renderGaps() const {
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return _renderGaps;
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}
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private:
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struct PreCapturedView {
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int height = 0;
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int top = 0;
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};
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struct CollapseGapState {
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int absY = -1;
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int startHeight = 0;
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int currentHeight = 0;
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int originalHeight = 0;
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};
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void captureItemsBatch(
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const std::vector<not_null<HistoryItem*>> &items);
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[[nodiscard]] bool captureView(
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not_null<const HistoryView::Element*> view,
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int viewHeight,
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int viewTop);
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void startCollapseAnimation(int height, int itemTop);
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void collapseAnimationCallback();
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void syncCollapseGapsToHost();
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void ensureScrollBaseline();
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const not_null<Main::Session*> _session;
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const Delegate _delegate;
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std::unique_ptr<ThanosEffect> _thanosEffect;
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base::flat_map<FullMsgId, PreCapturedView> _preCaptured;
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std::vector<CollapseGap> _renderGaps;
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std::vector<CollapseGapState> _collapseGaps;
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Animations::Simple _collapseAnimation;
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int _savedScrollTop = 0;
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bool _restoreScrollPending = false;
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bool _wasAtBottom = false;
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};
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} // namespace Ui
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