Fix possible assertion violation in text.

Fixes #31047.

Telegram/SourceFiles/tests/test_main.cpp

@@ -7,6 +7,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "tests/test_main.h"
 
+#include "base/base_file_utilities.h"
 #include "base/invoke_queued.h"
 #include "base/integration.h"
 #include "ui/effects/animations.h"
@@ -171,6 +172,10 @@ int main(int argc, char *argv[]) {
 	auto app = App(argc, argv);
 	app.installNativeEventFilter(&app);
 
+#ifdef Q_OS_MAC
+	base::RegisterBundledResources(u"test_text.rcc"_q);
+#endif // Q_OS_MAC
+
 	const auto ratio = app.devicePixelRatio();
 	const auto useRatio = std::clamp(qCeil(ratio), 1, 3);
 	style::SetDevicePixelRatio(useRatio);

Telegram/SourceFiles/tests/test_main.h

@@ -36,6 +36,12 @@ void test(not_null<Ui::RpWindow*> window, not_null<Ui::RpWidget*> widget);
 };
 
 class App final : public QApplication, public QAbstractNativeEventFilter {
+private:
+	auto createEventNestingLevel() {
+		incrementEventNestingLevel();
+		return gsl::finally([=] { decrementEventNestingLevel(); });
+	}
+
 public:
 	using QApplication::QApplication;
 
@@ -56,11 +62,6 @@ private:
 		FnMut<void()> callable;
 	};
 
-	auto createEventNestingLevel() {
-		incrementEventNestingLevel();
-		return gsl::finally([=] { decrementEventNestingLevel(); });
-	}
-
 	void checkForEmptyLoopNestingLevel();
 	void processPostponedCalls(int level);
 	void incrementEventNestingLevel();

Telegram/SourceFiles/tests/test_text.cpp

@@ -438,7 +438,7 @@ void test(not_null<Ui::RpWindow*> window, not_null<Ui::RpWidget*> body) {
 	Expects(!HasEntityType(formulaMime.rich.entities, EntityType::CustomEmoji));
 	Expects(formulaMime.tags.size() == 1);
 	const auto expectedFormulaTag = TextForMimeDataTag{
-		.offset = formulaPosition,
+		.offset = int(formulaPosition),
 		.length = int(formulaReplacementText.size()),
 		.id = Ui::InputField::kTagIvMath,
 	};
@@ -464,6 +464,46 @@ void test(not_null<Ui::RpWindow*> window, not_null<Ui::RpWidget*> body) {
 	Expects(!formulaText->isOnlyCustomEmoji());
 	Expects(!formulaText->isIsolatedEmoji());
 
+	auto longFormulaSource = QString();
+	while (longFormulaSource.size() <= 4096) {
+		longFormulaSource.append(u"\\alpha+\\beta "_q);
+	}
+	auto longFormulaData = TextWithEntities();
+	longFormulaData.append(u"Before "_q);
+	const auto longFormulaPosition = longFormulaData.text.size();
+	longFormulaData.append(longFormulaSource);
+	longFormulaData.entities.push_back(EntityInText(
+		EntityType::CustomEmoji,
+		longFormulaPosition,
+		longFormulaSource.size(),
+		formulaEntityData));
+	longFormulaData.append(u" after"_q);
+	const auto longFormulaText = Ui::Text::String(
+		st::defaultTextStyle,
+		longFormulaData,
+		kMarkupTextOptions,
+		scale(64),
+		context);
+	Expects(longFormulaText.maxWidth() >= formulaImage.width());
+	Expects(longFormulaText.countHeight(scale(200)) > 0);
+	Expects(
+		longFormulaText.toString()
+			== u"Before "_q + formulaReplacementText + u" after"_q);
+	const auto longFormulaRender = RenderTextOffscreen(
+		longFormulaText,
+		scale(200));
+	Expects(HasPaintedPixels(longFormulaRender));
+
+	const auto longSpacedEmojiText = Ui::Text::String(
+		st::defaultTextStyle,
+		QString::fromUtf8("\xF0\x9F\x98\x80")
+			+ QString(4100, QChar(' '))
+			+ u"x"_q,
+		kDefaultTextOptions,
+		scale(64));
+	Expects(longSpacedEmojiText.maxWidth() > 0);
+	Expects(longSpacedEmojiText.countHeight(scale(200)) > 0);
+
 	auto controlData = TextWithEntities();
 	controlData.append(QChar::ObjectReplacementCharacter);
 	controlData.entities.push_back(EntityInText(

Telegram/cmake/tests.cmake

@@ -42,3 +42,14 @@ set_target_properties(test_text PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINA
 add_dependencies(Telegram test_text)
 
 target_prepare_qrc(test_text)
+
+if (APPLE)
+    add_custom_command(TARGET test_text POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E make_directory
+            "$<TARGET_FILE_DIR:test_text>/Contents/Resources"
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different
+            "${CMAKE_BINARY_DIR}/test_text.rcc"
+            "${CMAKE_BINARY_DIR}/lib_ui.rcc"
+            "$<TARGET_FILE_DIR:test_text>/Contents/Resources/"
+    )
+endif()