Accessibility: context-menu focus announcement for screen readers (#476)

Telegram/SourceFiles/test/accessibility_names_snippet.cpp

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+// Standalone accessibility verification snippet for Phase 3.
+//
+// This file is intentionally a self-contained snippet (it has its own main())
+// so it can be compiled directly against Qt + lib_ui in a full desktop-app
+// build environment. It is NOT wired into the Test::Runner harness because the
+// name checks do not need a session or a window; they only need a live
+// QApplication, the style system, and Ui::Integration started.
+//
+// Build (in a configured desktop-app tree, sketch):
+//   c++ accessibility_names_snippet.cpp \
+//     -I<lib_ui> -I<lib_base> -I<rpl> \
+//     -I$QT/include $(pkg-config --cflags --libs Qt6Widgets Qt6Gui) \
+//     -l_ui -l_base -l_rpl -o accessibility_names_snippet
+//
+// Then run with a screen-reader-capable platform plugin, e.g.:
+//   QT_ACCESSIBILITY=1 ./accessibility_names_snippet
+//
+// Expected output:
+//   PASS: AbstractButton icon-only fallback exposes tooltip as name
+//   PASS: SettingsButton exposes its text as the accessible name
+
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QWidget>
+#include <QtGui/QAccessible>
+
+#include "ui/abstract_button.h"
+#include "ui/widgets/buttons.h"
+#include "ui/integration.h"
+#include "styles/style_widgets.h"
+
+#include <cassert>
+#include <iostream>
+
+int main(int argc, char **argv) {
+	QApplication app(argc, argv);
+	Ui::Integration::Instance().setScale(1.);
+
+	QWidget parent;
+	parent.show();
+
+	// 1) Icon-only button: no text, only a tooltip. The new AbstractButton
+	//    fallback must surface the tooltip as the accessible name.
+	auto iconButton = Ui::CreateChild<Ui::IconButton>(
+		&parent,
+		st::defaultIconButton);
+	iconButton->setToolTip(u"Close chat"_q);
+	iconButton->show();
+
+	{
+		const auto iface = QAccessible::queryAccessibleInterface(iconButton);
+		assert(iface);
+		const auto name = iface->text(QAccessible::Name);
+		std::cout
+			<< (name == u"Close chat"_q ? "PASS" : "FAIL")
+			<< ": AbstractButton icon-only fallback exposes tooltip as name"
+			<< " (got: \"" << name.toStdString() << "\")\n";
+		assert(name == u"Close chat"_q);
+	}
+
+	// 2) SettingsButton with text: text() must be exposed as the name.
+	auto settings = Ui::CreateChild<Ui::SettingsButton>(
+		&parent,
+		rpl::single(u"Privacy and Security"_q));
+	settings->show();
+
+	{
+		const auto iface = QAccessible::queryAccessibleInterface(settings);
+		assert(iface);
+		const auto name = iface->text(QAccessible::Name);
+		std::cout
+			<< (name == u"Privacy and Security"_q ? "PASS" : "FAIL")
+			<< ": SettingsButton exposes its text as the accessible name"
+			<< " (got: \"" << name.toStdString() << "\")\n";
+		assert(name == u"Privacy and Security"_q);
+	}
+
+	std::cout << "All accessibility name checks passed.\n";
+	return 0;
+}