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Telegram/SourceFiles/ui/effects/emoji_fly_animation.cpp

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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
+*/
+#include "ui/effects/emoji_fly_animation.h"
+
+#include "data/stickers/data_custom_emoji.h"
+#include "ui/text/text_custom_emoji.h"
+#include "ui/animated_icon.h"
+#include "ui/ui_utility.h"
+#include "styles/style_info.h"
+#include "styles/style_chat.h"
+
+namespace Ui {
+namespace {
+
+[[nodiscard]] int ComputeFlySize(Data::CustomEmojiSizeTag tag) {
+	using Tag = Data::CustomEmojiSizeTag;
+	if (tag == Tag::Normal) {
+		return st::reactionInlineImage;
+	}
+	return int(base::SafeRound(
+		(st::reactionInlineImage * Data::FrameSizeFromTag(tag)
+			/ float64(Data::FrameSizeFromTag(Tag::Normal)))));
+}
+
+} // namespace
+
+EmojiFlyAnimation::EmojiFlyAnimation(
+	not_null<Ui::RpWidget*> body,
+	not_null<Data::Reactions*> owner,
+	ReactionFlyAnimationArgs &&args,
+	Fn<void()> repaint,
+	Fn<QColor()> textColor,
+	Data::CustomEmojiSizeTag tag)
+: _flySize(ComputeFlySize(tag))
+, _textColor(std::move(textColor))
+, _fly(
+	owner,
+	std::move(args),
+	std::move(repaint),
+	_flySize,
+	tag)
+, _layer(body) {
+	body->sizeValue() | rpl::on_next([=](QSize size) {
+		_layer.setGeometry(QRect(QPoint(), size));
+	}, _layer.lifetime());
+
+	_layer.paintRequest(
+	) | rpl::on_next([=](QRect clip) {
+		const auto target = _target.data();
+		if (!target || !target->isVisible()) {
+			return;
+		}
+		auto p = QPainter(&_layer);
+
+		const auto rect = Ui::MapFrom(&_layer, target, target->rect());
+		const auto skipx = (rect.width() - _flySize) / 2;
+		const auto skipy = (rect.height() - _flySize) / 2;
+		const auto area = _fly.paintGetArea(
+			p,
+			QPoint(),
+			QRect(
+				rect.topLeft() + QPoint(skipx, skipy),
+				QSize(_flySize, _flySize)),
+			(_textColor ? _textColor() : st::infoPeerBadge.premiumFg->c),
+			clip,
+			crl::now());
+		if (_areaUpdated || _area.isEmpty()) {
+			_area = area;
+		} else {
+			_area = _area.united(area);
+		}
+	}, _layer.lifetime());
+
+	_layer.setAttribute(Qt::WA_TransparentForMouseEvents);
+	_layer.show();
+}
+
+not_null<Ui::RpWidget*> EmojiFlyAnimation::layer() {
+	return &_layer;
+}
+
+bool EmojiFlyAnimation::finished() const {
+	if (const auto target = _target.data()) {
+		return _fly.finished() || !target->isVisible();
+	}
+	return true;
+}
+
+void EmojiFlyAnimation::repaint() {
+	if (_area.isEmpty()) {
+		_layer.update();
+	} else {
+		_layer.update(_area);
+		_areaUpdated = true;
+	}
+}
+
+bool EmojiFlyAnimation::paintBadgeFrame(not_null<QWidget*> widget) {
+	_target = widget;
+	return !_fly.finished();
+}
+
+ReactionFlyCenter EmojiFlyAnimation::grabBadgeCenter() {
+	auto result = _fly.takeCenter();
+	result.size = _flySize;
+	return result;
+}
+
+} // namespace Ui