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Telegram/SourceFiles/ui/text/text_lottie_custom_emoji.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/text/text_lottie_custom_emoji.h"
+
+#include "lottie/lottie_icon.h"
+#include "ui/text/text_utilities.h"
+
+namespace Ui::Text {
+
+LottieCustomEmoji::LottieCustomEmoji(Lottie::IconDescriptor &&descriptor)
+: LottieCustomEmoji(std::move(descriptor), nullptr) {
+}
+
+LottieCustomEmoji::LottieCustomEmoji(
+		Lottie::IconDescriptor &&descriptor,
+		Fn<void()> repaint)
+: _entityData(!descriptor.name.isEmpty()
+	? descriptor.name
+	: !descriptor.path.isEmpty()
+	? descriptor.path
+	: (Unexpected("LottieCustomEmoji: descriptor.name or descriptor.path"),
+		QString()))
+, _width(descriptor.sizeOverride.width())
+, _icon(Lottie::MakeIcon(std::move(descriptor)))
+, _repaint(std::move(repaint)) {
+	if (!_width && _icon && _icon->valid()) {
+		_width = _icon->width();
+		startAnimation();
+	}
+}
+
+int LottieCustomEmoji::width() {
+	return _width;
+}
+
+QString LottieCustomEmoji::entityData() {
+	return _entityData;
+}
+
+void LottieCustomEmoji::paint(QPainter &p, const Context &context) {
+	if (!_icon || !_icon->valid()) {
+		return;
+	}
+
+	const auto paused = context.paused
+		|| context.internal.forceFirstFrame
+		|| context.internal.overrideFirstWithLastFrame;
+
+	if (paused) {
+		const auto frame = context.internal.forceLastFrame
+			? _icon->framesCount() - 1
+			: 0;
+		_icon->jumpTo(frame, _repaint);
+	} else if (!_icon->animating()) {
+		startAnimation();
+	}
+
+	_icon->paint(
+		p,
+		context.position.x(),
+		context.position.y(),
+		context.textColor);
+}
+
+void LottieCustomEmoji::unload() {
+	if (_icon) {
+		_icon->jumpTo(0, nullptr);
+	}
+}
+
+bool LottieCustomEmoji::ready() {
+	return _icon && _icon->valid();
+}
+
+bool LottieCustomEmoji::readyInDefaultState() {
+	return _icon && _icon->valid() && _icon->frameIndex() == 0;
+}
+
+void LottieCustomEmoji::startAnimation() {
+	if (!_icon || !_icon->valid() || _icon->framesCount() <= 1) {
+		return;
+	}
+
+	_icon->animate(
+		_repaint,
+		0,
+		_icon->framesCount() - 1);
+}
+
+QString LottieEmojiData(Lottie::IconDescriptor descriptor) {
+	return !descriptor.name.isEmpty()
+		? descriptor.name
+		: !descriptor.path.isEmpty()
+		? descriptor.path
+		: QString();
+}
+
+TextWithEntities LottieEmoji(Lottie::IconDescriptor descriptor) {
+	return SingleCustomEmoji(LottieEmojiData(std::move(descriptor)));
+}
+
+MarkedContext LottieEmojiContext(Lottie::IconDescriptor descriptor) {
+	auto customEmojiFactory = [descriptor = std::move(descriptor)](
+			QStringView data,
+			const MarkedContext &context
+		) mutable -> std::unique_ptr<CustomEmoji> {
+		if (data == LottieEmojiData(descriptor)) {
+			return std::make_unique<LottieCustomEmoji>(
+				std::move(descriptor),
+				context.repaint);
+		}
+		return nullptr;
+	};
+	return { .customEmojiFactory = std::move(customEmojiFactory) };
+}
+
+} // namespace Ui::Text