Allow unloading custom emoji data.

ui/text/text.cpp

@@ -838,7 +838,11 @@ void Parser::finalize(const TextParseOptions &options) {
 			currentIndex++;
 		}
 	};
+	_t->_hasCustomEmoji = false;
 	for (auto &block : _t->_blocks) {
+		if (block->type() == TextBlockTCustomEmoji) {
+			_t->_hasCustomEmoji = true;
+		}
 		const auto spoilerIndex = block->spoilerIndex();
 		if (spoilerIndex && (_t->_spoilers.size() < spoilerIndex)) {
 			_t->_spoilers.resize(spoilerIndex);
@@ -1682,7 +1686,7 @@ private:
 								x,
 								y);
 						} else if (const auto custom = static_cast<const CustomEmojiBlock*>(currentBlock)->_custom.get()) {
-							custom->paint(*_p, x, y);
+							custom->paint(*_p, x, y, _textPalette->spoilerActiveBg->c);
 						}
 					}
 					if (hasSpoiler) {
@@ -3515,6 +3519,22 @@ void String::enumerateText(
 	}
 }
 
+bool String::hasCustomEmoji() const {
+	return _hasCustomEmoji;
+}
+
+void String::unloadCustomEmoji() {
+	if (!_hasCustomEmoji) {
+		return;
+	}
+	for (const auto &block : _blocks) {
+		const auto raw = block.get();
+		if (raw->type() == TextBlockTCustomEmoji) {
+			static_cast<const CustomEmojiBlock*>(raw)->_custom->unload();
+		}
+	}
+}
+
 QString String::toString(TextSelection selection) const {
 	return toText(selection, false, false).rich.text;
 }

ui/text/text.h

@@ -161,6 +161,9 @@ public:
 		return _text.size();
 	}
 
+	[[nodiscard]] bool hasCustomEmoji() const;
+	void unloadCustomEmoji();
+
 	QString toString(TextSelection selection = AllTextSelection) const;
 	TextWithEntities toTextWithEntities(
 		TextSelection selection = AllTextSelection) const;
@@ -207,6 +210,7 @@ private:
 	QFixed _minResizeWidth;
 	QFixed _maxWidth = 0;
 	int32 _minHeight = 0;
+	bool _hasCustomEmoji = false;
 
 	QString _text;
 	const style::TextStyle *_st = nullptr;

ui/text/text_block.h

@@ -168,7 +168,8 @@ class CustomEmoji {
 public:
 	virtual ~CustomEmoji() = default;
 	[[nodiscard]] virtual QString entityData() = 0;
-	virtual void paint(QPainter &p, int x, int y) = 0;
+	virtual void paint(QPainter &p, int x, int y, const QColor &preview) = 0;
+	virtual void unload() = 0;
 
 };