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Telegram/SourceFiles/dialogs/ui/dialogs_message_view.h

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+/*
+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
+
+#include <any>
+
+class Image;
+class HistoryItem;
+enum class ImageRoundRadius;
+
+namespace style {
+struct DialogRow;
+struct DialogsMiniIcon;
+} // namespace style
+
+namespace Ui {
+class SpoilerAnimation;
+} // namespace Ui
+
+namespace Data {
+class Forum;
+class SavedMessages;
+} // namespace Data
+
+namespace HistoryView {
+struct ToPreviewOptions;
+struct ItemPreviewImage;
+struct ItemPreview;
+} // namespace HistoryView
+
+namespace Dialogs::Ui {
+
+using namespace ::Ui;
+
+struct PaintContext;
+struct TopicJumpCache;
+class TopicsView;
+
+[[nodiscard]] TextWithEntities DialogsPreviewText(TextWithEntities text);
+
+class MessageView final {
+public:
+	MessageView();
+	~MessageView();
+
+	using ToPreviewOptions = HistoryView::ToPreviewOptions;
+	using ItemPreviewImage = HistoryView::ItemPreviewImage;
+	using ItemPreview = HistoryView::ItemPreview;
+
+	void itemInvalidated(not_null<const HistoryItem*> item);
+	[[nodiscard]] bool dependsOn(not_null<const HistoryItem*> item) const;
+
+	[[nodiscard]] bool prepared(
+		not_null<const HistoryItem*> item,
+		Data::Forum *forum,
+		Data::SavedMessages *monoforum) const;
+	void prepare(
+		not_null<const HistoryItem*> item,
+		Data::Forum *forum,
+		Data::SavedMessages *monoforum,
+		Fn<void()> customEmojiRepaint,
+		ToPreviewOptions options);
+
+	void paint(
+		Painter &p,
+		const QRect &geometry,
+		const PaintContext &context) const;
+
+	[[nodiscard]] bool isInTopicJump(int x, int y) const;
+	void addTopicJumpRipple(
+		QPoint origin,
+		not_null<TopicJumpCache*> topicJumpCache,
+		Fn<void()> updateCallback);
+	void stopLastRipple();
+	void clearRipple();
+
+private:
+	struct LoadingContext;
+
+	[[nodiscard]] int countWidth() const;
+	void paintJumpToLast(
+		Painter &p,
+		const QRect &rect,
+		const PaintContext &context,
+		int width1) const;
+
+	mutable const HistoryItem *_textCachedFor = nullptr;
+	mutable Text::String _senderCache;
+	mutable std::unique_ptr<TopicsView> _topics;
+	mutable Text::String _textCache;
+	mutable std::vector<ItemPreviewImage> _imagesCache;
+	mutable std::unique_ptr<SpoilerAnimation> _spoiler;
+	mutable std::unique_ptr<LoadingContext> _loadingContext;
+	mutable const style::DialogsMiniIcon *_leftIcon = nullptr;
+	mutable QImage _cornersCache;
+	mutable bool _hasPlainLinkAtBegin = false;
+
+};
+
+[[nodiscard]] HistoryView::ItemPreview PreviewWithSender(
+	HistoryView::ItemPreview &&preview,
+	const QString &sender,
+	TextWithEntities topic);
+
+} // namespace Dialogs::Ui