tdesktop/Telegram/SourceFiles/history/history_media_grouped.h

/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once

#include "history/history_media.h"
#include "data/data_document.h"
#include "data/data_photo.h"

class HistoryGroupedMedia : public HistoryMedia {
public:
	HistoryGroupedMedia(
		not_null<HistoryItem*> parent,
		const std::vector<not_null<HistoryItem*>> &others);

	HistoryMediaType type() const override {
		return MediaTypeGrouped;
	}
	std::unique_ptr<HistoryMedia> clone(
			not_null<HistoryItem*> newParent,
			not_null<HistoryItem*> realParent) const override {
		Unexpected("Clone HistoryGroupedMedia.");
	}

	void initDimensions() override;
	int resizeGetHeight(int width) override;

	void draw(
		Painter &p,
		const QRect &clip,
		TextSelection selection,
		TimeMs ms) const override;
	HistoryTextState getState(
		QPoint point,
		HistoryStateRequest request) const override;

	bool toggleSelectionByHandlerClick(
		const ClickHandlerPtr &p) const override;
	bool dragItemByHandler(const ClickHandlerPtr &p) const override;

	[[nodiscard]] TextSelection adjustSelection(
		TextSelection selection,
		TextSelectType type) const override;
	uint16 fullSelectionLength() const override {
		return _caption.length();
	}
	bool hasTextForCopy() const override {
		return !_caption.isEmpty();
	}

	QString notificationText() const override;
	QString inDialogsText() const override;
	TextWithEntities selectedText(TextSelection selection) const override;

	void clickHandlerActiveChanged(
		const ClickHandlerPtr &p,
		bool active) override;
	void clickHandlerPressedChanged(
		const ClickHandlerPtr &p,
		bool pressed) override;

	void attachToParent() override;
	void detachFromParent() override;
	std::unique_ptr<HistoryMedia> takeLastFromGroup() override;
	bool applyGroup(
		const std::vector<not_null<HistoryItem*>> &others) override;

	bool hasReplyPreview() const override;
	ImagePtr replyPreview() override;

	Storage::SharedMediaTypesMask sharedMediaTypes() const override;
	bool canBeGrouped() const override {
		return true;
	}

	bool skipBubbleTail() const override {
		return isBubbleBottom() && _caption.isEmpty();
	}
	void updateNeedBubbleState() override;
	bool needsBubble() const override;
	bool customInfoLayout() const override {
		return _caption.isEmpty();
	}
	bool allowsFastShare() const override {
		return true;
	}

private:
	struct Element {
		Element(not_null<HistoryItem*> item);

		not_null<HistoryItem*> item;
		std::unique_ptr<HistoryMedia> content;

		RectParts sides = RectPart::None;
		QRect initialGeometry;
		QRect geometry;
		mutable uint64 cacheKey = 0;
		mutable QPixmap cache;

	};

	bool computeNeedBubble() const;
	not_null<HistoryMedia*> main() const;
	bool validateGroupElements(
		const std::vector<not_null<HistoryItem*>> &others) const;

	Text _caption;
	std::vector<Element> _elements;
	bool _needBubble = false;

};