From d4247511355a666903e9a57d821b1eb58884aade Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 12 Feb 2024 14:50:04 +0400
Subject: [PATCH] Ui::DynamicImage / Ui::CustomEmoji::DynamicImageEmoji.

---
 CMakeLists.txt                    |  1 +
 ui/dynamic_image.h                | 19 ++++++++++++
 ui/text/custom_emoji_instance.cpp | 51 +++++++++++++++++++++++++++++++
 ui/text/custom_emoji_instance.h   | 27 ++++++++++++++++
 4 files changed, 98 insertions(+)
 create mode 100644 ui/dynamic_image.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 281dbb6..6646223 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -273,6 +273,7 @@ PRIVATE
     ui/delayed_activation.h
     ui/dragging_scroll_manager.cpp
     ui/dragging_scroll_manager.h
+    ui/dynamic_image.h
     ui/emoji_config.cpp
     ui/emoji_config.h
     ui/focus_persister.h
diff --git a/ui/dynamic_image.h b/ui/dynamic_image.h
new file mode 100644
index 0000000..6c62830
--- /dev/null
+++ b/ui/dynamic_image.h
@@ -0,0 +1,19 @@
+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+namespace Ui {
+
+class DynamicImage {
+public:
+	virtual ~DynamicImage() = default;
+
+	[[nodiscard]] virtual QImage image(int size) = 0;
+	virtual void subscribeToUpdates(Fn<void()> callback) = 0;
+};
+
+} // namespace Ui
diff --git a/ui/text/custom_emoji_instance.cpp b/ui/text/custom_emoji_instance.cpp
index 279ac85..1e1acac 100644
--- a/ui/text/custom_emoji_instance.cpp
+++ b/ui/text/custom_emoji_instance.cpp
@@ -8,6 +8,7 @@
 
 #include "ui/effects/animation_value.h"
 #include "ui/effects/frame_generator.h"
+#include "ui/dynamic_image.h"
 #include "ui/ui_utility.h"
 #include "ui/painter.h"
 
@@ -903,4 +904,54 @@ bool Internal::readyInDefaultState() {
 	return true;
 }
 
+DynamicImageEmoji::DynamicImageEmoji(
+	QString entityData,
+	std::shared_ptr<DynamicImage> image,
+	Fn<void()> repaint,
+	QMargins padding,
+	int size)
+: _entityData(entityData)
+, _image(std::move(image))
+, _repaint(std::move(repaint))
+, _padding(padding)
+, _size(size) {
+}
+
+int DynamicImageEmoji::width() {
+	return _padding.left() + _size + _padding.right();
+}
+
+QString DynamicImageEmoji::entityData() {
+	return _entityData;
+}
+
+void DynamicImageEmoji::paint(QPainter &p, const Context &context) {
+	if (!_subscribed) {
+		_subscribed = true;
+		_image->subscribeToUpdates(_repaint);
+	}
+
+	const auto rect = QRect(
+		context.position + QPoint(_padding.left(), _padding.top()),
+		QSize(_size, _size));
+	auto image = _image->image(_size);
+	context.internal.colorized = false;
+	PaintScaledImage(p, rect, { &image }, context);
+}
+
+void DynamicImageEmoji::unload() {
+	if (_subscribed) {
+		_subscribed = false;
+		_image->subscribeToUpdates(nullptr);
+	}
+}
+
+bool DynamicImageEmoji::ready() {
+	return true;
+}
+
+bool DynamicImageEmoji::readyInDefaultState() {
+	return true;
+}
+
 } // namespace Ui::CustomEmoji
diff --git a/ui/text/custom_emoji_instance.h b/ui/text/custom_emoji_instance.h
index be56c2d..337e8b6 100644
--- a/ui/text/custom_emoji_instance.h
+++ b/ui/text/custom_emoji_instance.h
@@ -17,6 +17,7 @@ class QColor;
 class QPainter;
 
 namespace Ui {
+class DynamicImage;
 class FrameGenerator;
 } // namespace Ui
 
@@ -296,4 +297,30 @@ private:
 
 };
 
+class DynamicImageEmoji final : public Ui::Text::CustomEmoji {
+public:
+	DynamicImageEmoji(
+		QString entityData,
+		std::shared_ptr<DynamicImage> image,
+		Fn<void()> repaint,
+		QMargins padding,
+		int size);
+
+	int width() override;
+	QString entityData() override;
+	void paint(QPainter &p, const Context &context) override;
+	void unload() override;
+	bool ready() override;
+	bool readyInDefaultState() override;
+
+private:
+	const QString _entityData;
+	const std::shared_ptr<DynamicImage> _image;
+	const Fn<void()> _repaint;
+	const QMargins _padding;
+	const int _size = 0;
+	bool _subscribed = false;
+
+};
+
 } // namespace Ui::CustomEmoji