Allow querying in-default-state from custom emoji.

ui/text/custom_emoji_instance.cpp

@@ -220,6 +220,10 @@ int Cache::frames() const {
 	return _frames;
 }
 
+bool Cache::readyInDefaultState() const {
+	return (_frames > 0) && !_frame;
+}
+
 Cache::Frame Cache::frame(int index) const {
 	Expects(index < _frames);
 
@@ -401,6 +405,10 @@ PaintFrameResult Cached::paint(QPainter &p, const Context &context) {
 	return _cache.paintCurrentFrame(p, context);
 }
 
+bool Cached::inDefaultState() const {
+	return _cache.readyInDefaultState();
+}
+
 Preview Cached::makePreview() const {
 	return _cache.makePreview();
 }
@@ -534,6 +542,10 @@ Preview Renderer::makePreview() const {
 	return _cache.makePreview();
 }
 
+bool Renderer::readyInDefaultState() const {
+	return _cache.readyInDefaultState();
+}
+
 void Renderer::setRepaintCallback(Fn<void()> repaint) {
 	_repaint = std::move(repaint);
 }
@@ -659,6 +671,20 @@ bool Instance::ready() {
 	});
 }
 
+bool Instance::readyInDefaultState() {
+	return v::match(_state, [&](Loading &state) {
+		if (state.hasImagePreview()) {
+			return true;
+		}
+		load(state);
+		return false;
+	}, [](Caching &state) {
+		return state.renderer->readyInDefaultState();
+	}, [](Cached &state) {
+		return state.inDefaultState();
+	});
+}
+
 void Instance::load(Loading &state) {
 	state.load([=](Loader::LoadResult result) {
 		if (auto caching = std::get_if<Caching>(&result)) {
@@ -768,6 +794,14 @@ bool Object::ready() {
 	return _instance->ready();
 }
 
+bool Object::readyInDefaultState() {
+	if (!_using) {
+		_using = true;
+		_instance->incrementUsage(this);
+	}
+	return _instance->readyInDefaultState();
+}
+
 void Object::repaint() {
 	_repaint();
 }

ui/text/custom_emoji_instance.h

@@ -81,6 +81,7 @@ public:
 
 	[[nodiscard]] int size() const;
 	[[nodiscard]] int frames() const;
+	[[nodiscard]] bool readyInDefaultState() const;
 	[[nodiscard]] Frame frame(int index) const;
 	void reserve(int frames);
 	void add(crl::time duration, const QImage &frame);
@@ -122,6 +123,7 @@ public:
 	[[nodiscard]] QString entityData() const;
 	[[nodiscard]] Preview makePreview() const;
 	PaintFrameResult paint(QPainter &p, const Context &context);
+	[[nodiscard]] bool inDefaultState() const;
 	[[nodiscard]] Loading unload();
 
 private:
@@ -149,6 +151,7 @@ public:
 
 	[[nodiscard]] bool canMakePreview() const;
 	[[nodiscard]] Preview makePreview() const;
+	[[nodiscard]] bool readyInDefaultState() const;
 
 	void setRepaintCallback(Fn<void()> repaint);
 	[[nodiscard]] Cache takeCache();
@@ -227,6 +230,7 @@ public:
 	[[nodiscard]] QString entityData() const;
 	void paint(QPainter &p, const Context &context);
 	[[nodiscard]] bool ready();
+	[[nodiscard]] bool readyInDefaultState();
 	[[nodiscard]] bool hasImagePreview() const;
 	[[nodiscard]] Preview imagePreview() const;
 	void updatePreview(Preview preview);
@@ -260,6 +264,7 @@ public:
 	void paint(QPainter &p, const Context &context) override;
 	void unload() override;
 	bool ready() override;
+	bool readyInDefaultState() override;
 
 	void repaint();
 

ui/text/text_custom_emoji.cpp

@@ -37,6 +37,10 @@ bool ShiftedEmoji::ready() {
 	return _wrapped->ready();
 }
 
+bool ShiftedEmoji::readyInDefaultState() {
+	return _wrapped->readyInDefaultState();
+}
+
 FirstFrameEmoji::FirstFrameEmoji(std::unique_ptr<CustomEmoji> wrapped)
 : _wrapped(std::move(wrapped)) {
 }
@@ -59,4 +63,8 @@ bool FirstFrameEmoji::ready() {
 	return _wrapped->ready();
 }
 
+bool FirstFrameEmoji::readyInDefaultState() {
+	return _wrapped->readyInDefaultState();
+}
+
 } // namespace Ui::Text

ui/text/text_custom_emoji.h

@@ -39,6 +39,7 @@ public:
 	virtual void paint(QPainter &p, const Context &context) = 0;
 	virtual void unload() = 0;
 	[[nodiscard]] virtual bool ready() = 0;
+	[[nodiscard]] virtual bool readyInDefaultState() = 0;
 
 };
 
@@ -54,6 +55,7 @@ public:
 	void paint(QPainter &p, const Context &context) override;
 	void unload() override;
 	bool ready() override;
+	bool readyInDefaultState() override;
 
 private:
 	const std::unique_ptr<Ui::Text::CustomEmoji> _wrapped;
@@ -69,6 +71,7 @@ public:
 	void paint(QPainter &p, const Context &context) override;
 	void unload() override;
 	bool ready() override;
+	bool readyInDefaultState() override;
 
 private:
 	const std::unique_ptr<Ui::Text::CustomEmoji> _wrapped;