Added animation for spoilers in sections.

Telegram/CMakeLists.txt

@@ -671,6 +671,8 @@ PRIVATE
     history/view/history_view_send_action.h
     history/view/history_view_service_message.cpp
     history/view/history_view_service_message.h
+    history/view/history_view_spoiler_click_handler.cpp
+    history/view/history_view_spoiler_click_handler.h
     history/view/history_view_top_bar_widget.cpp
     history/view/history_view_top_bar_widget.h
     history/view/history_view_view_button.cpp

Telegram/SourceFiles/history/admin_log/history_admin_log_inner.cpp

@@ -673,6 +673,11 @@ void InnerWidget::elementStartInteraction(not_null<const Element*> view) {
 void InnerWidget::elementShowReactions(not_null<const Element*> view) {
 }
 
+void InnerWidget::elementShowSpoilerAnimation() {
+	_spoilerOpacity.stop();
+	_spoilerOpacity.start([=] { update(); }, 0., 1., st::fadeWrapDuration);
+}
+
 void InnerWidget::saveState(not_null<SectionMemento*> memento) {
 	memento->setFilter(std::move(_filter));
 	memento->setAdmins(std::move(_admins));

Telegram/SourceFiles/history/admin_log/history_admin_log_inner.h

@@ -141,6 +141,7 @@ public:
 		not_null<const HistoryView::Element*> view) override;
 	void elementShowReactions(
 		not_null<const HistoryView::Element*> view) override;
+	void elementShowSpoilerAnimation() override;
 
 	~InnerWidget();
 
@@ -324,6 +325,8 @@ private:
 	QPoint _trippleClickPoint;
 	base::Timer _trippleClickTimer;
 
+	Ui::Animations::Simple _spoilerOpacity;
+
 	FilterValue _filter;
 	QString _searchQuery;
 	std::vector<not_null<UserData*>> _admins;

Telegram/SourceFiles/history/history_inner_widget.cpp

@@ -2903,6 +2903,11 @@ void HistoryInner::elementShowReactions(not_null<const Element*> view) {
 		view->data()));
 }
 
+void HistoryInner::elementShowSpoilerAnimation() {
+	_spoilerOpacity.stop();
+	_spoilerOpacity.start([=] { update(); }, 0., 1., st::fadeWrapDuration);
+}
+
 auto HistoryInner::getSelectionState() const
 -> HistoryView::TopBarWidget::SelectedState {
 	auto result = HistoryView::TopBarWidget::SelectedState {};
@@ -3862,6 +3867,11 @@ not_null<HistoryView::ElementDelegate*> HistoryInner::ElementDelegate() {
 				Instance->elementShowReactions(view);
 			}
 		}
+		void elementShowSpoilerAnimation() override {
+			if (Instance) {
+				Instance->elementShowSpoilerAnimation();
+			}
+		}
 
 	};
 

Telegram/SourceFiles/history/history_inner_widget.h

@@ -126,6 +126,7 @@ public:
 	void elementReplyTo(const FullMsgId &to);
 	void elementStartInteraction(not_null<const Element*> view);
 	void elementShowReactions(not_null<const Element*> view);
+	void elementShowSpoilerAnimation();
 
 	void updateBotInfo(bool recount = true);
 
@@ -446,6 +447,8 @@ private:
 	crl::time _touchTime = 0;
 	base::Timer _touchScrollTimer;
 
+	Ui::Animations::Simple _spoilerOpacity;
+
 	base::unique_qptr<Ui::PopupMenu> _menu;
 
 	bool _scrollDateShown = false;

Telegram/SourceFiles/history/history_message.cpp

@@ -20,6 +20,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_service.h"
 #include "history/view/history_view_service_message.h"
 #include "history/view/history_view_context_menu.h" // CopyPostLink.
+#include "history/view/history_view_spoiler_click_handler.h"
 #include "history/view/media/history_view_media.h" // AddTimestampLinks.
 #include "chat_helpers/stickers_emoji_pack.h"
 #include "main/main_session.h"
@@ -1618,6 +1619,7 @@ void HistoryMessage::setText(const TextWithEntities &textWithEntities) {
 		withLocalEntities(textWithEntities),
 		Ui::ItemTextOptions(this),
 		context);
+	HistoryView::FillTextWithAnimatedSpoilers(_text, textWithEntities);
 	if (!textWithEntities.text.isEmpty() && _text.isEmpty()) {
 		// If server has allowed some text that we've trim-ed entirely,
 		// just replace it with something so that UI won't look buggy.

Telegram/SourceFiles/history/view/history_view_element.cpp

@@ -191,6 +191,9 @@ void SimpleElementDelegate::elementShowReactions(
 	not_null<const Element*> view) {
 }
 
+void SimpleElementDelegate::elementShowSpoilerAnimation() {
+}
+
 TextSelection UnshiftItemSelection(
 		TextSelection selection,
 		uint16 byLength) {

Telegram/SourceFiles/history/view/history_view_element.h

@@ -100,6 +100,7 @@ public:
 	virtual void elementReplyTo(const FullMsgId &to) = 0;
 	virtual void elementStartInteraction(not_null<const Element*> view) = 0;
 	virtual void elementShowReactions(not_null<const Element*> view) = 0;
+	virtual void elementShowSpoilerAnimation() = 0;
 
 	virtual ~ElementDelegate() {
 	}
@@ -158,6 +159,7 @@ public:
 	void elementReplyTo(const FullMsgId &to) override;
 	void elementStartInteraction(not_null<const Element*> view) override;
 	void elementShowReactions(not_null<const Element*> view) override;
+	void elementShowSpoilerAnimation() override;
 
 protected:
 	[[nodiscard]] not_null<Window::SessionController*> controller() const {

Telegram/SourceFiles/history/view/history_view_list_widget.cpp

@@ -1461,6 +1461,11 @@ void ListWidget::elementStartInteraction(not_null<const Element*> view) {
 void ListWidget::elementShowReactions(not_null<const Element*> view) {
 }
 
+void ListWidget::elementShowSpoilerAnimation() {
+	_spoilerOpacity.stop();
+	_spoilerOpacity.start([=] { update(); }, 0., 1., st::fadeWrapDuration);
+}
+
 void ListWidget::saveState(not_null<ListMemento*> memento) {
 	memento->setAroundPosition(_aroundPosition);
 	auto state = countScrollState();

Telegram/SourceFiles/history/view/history_view_list_widget.h

@@ -279,6 +279,7 @@ public:
 	void elementReplyTo(const FullMsgId &to) override;
 	void elementStartInteraction(not_null<const Element*> view) override;
 	void elementShowReactions(not_null<const Element*> view) override;
+	void elementShowSpoilerAnimation() override;
 
 	void setEmptyInfoWidget(base::unique_qptr<Ui::RpWidget> &&w);
 
@@ -608,6 +609,8 @@ private:
 	FullMsgId _highlightedMessageId;
 	base::Timer _highlightTimer;
 
+	Ui::Animations::Simple _spoilerOpacity;
+
 	Ui::SelectScrollManager _selectScroll;
 
 	rpl::event_stream<FullMsgId> _requestedToEditMessage;

Telegram/SourceFiles/history/view/history_view_spoiler_click_handler.cpp

@@ -0,0 +1,53 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "history/view/history_view_spoiler_click_handler.h"
+
+#include "core/click_handler_types.h" // ClickHandlerContext
+#include "history/view/history_view_element.h"
+#include "ui/spoiler_click_handler.h"
+
+namespace HistoryView {
+namespace {
+
+class AnimatedSpoilerClickHandler final : public SpoilerClickHandler {
+public:
+	AnimatedSpoilerClickHandler() = default;
+
+	void onClick(ClickContext context) const override;
+
+};
+
+void AnimatedSpoilerClickHandler::onClick(ClickContext context) const {
+	const auto button = context.button;
+	if (button != Qt::LeftButton) {
+		return;
+	}
+	const auto my = context.other.value<ClickHandlerContext>();
+	if (const auto d = my.elementDelegate ? my.elementDelegate() : nullptr) {
+		d->elementShowSpoilerAnimation();
+		const auto nonconst = const_cast<AnimatedSpoilerClickHandler*>(this);
+		nonconst->setStartMs(crl::now());
+		SpoilerClickHandler::onClick({});
+	}
+}
+
+} // namespace
+
+void FillTextWithAnimatedSpoilers(
+		Ui::Text::String &text,
+		const TextWithEntities &textWithEntities) {
+	for (auto i = 0; i < textWithEntities.entities.size(); i++) {
+		if (textWithEntities.entities[i].type() == EntityType::Spoiler) {
+			text.setSpoiler(
+				i + 1,
+				std::make_shared<AnimatedSpoilerClickHandler>());
+		}
+	}
+}
+
+} // namespace HistoryView

Telegram/SourceFiles/history/view/history_view_spoiler_click_handler.h

@@ -0,0 +1,16 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+namespace HistoryView {
+
+void FillTextWithAnimatedSpoilers(
+	Ui::Text::String &text,
+	const TextWithEntities &textWithEntities);
+
+} // namespace HistoryView

Telegram/SourceFiles/history/view/media/history_view_media.cpp

@@ -11,6 +11,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_item.h"
 #include "history/view/history_view_element.h"
 #include "history/view/history_view_cursor_state.h"
+#include "history/view/history_view_spoiler_click_handler.h"
 #include "lottie/lottie_single_player.h"
 #include "storage/storage_shared_media.h"
 #include "data/data_document.h"
@@ -196,11 +197,13 @@ Ui::Text::String Media::createCaption(not_null<HistoryItem*> item) const {
 	const auto context = Core::MarkedTextContext{
 		.session = &history()->session()
 	};
+	const auto textWithEntities = item->originalTextWithLocalEntities();
 	result.setMarkedText(
 		st::messageTextStyle,
-		item->originalTextWithLocalEntities(),
+		textWithEntities,
 		Ui::ItemTextOptions(item),
 		context);
+	FillTextWithAnimatedSpoilers(result, textWithEntities);
 	if (const auto width = _parent->skipBlockWidth()) {
 		result.updateSkipBlock(width, _parent->skipBlockHeight());
 	}