Add an 'Update your OS' top bar.

Set EOL for Windows XP / Vista version at September 1, 2019.

Telegram/SourceFiles/window/main_window.cpp

@@ -14,6 +14,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "window/themes/window_theme.h"
 #include "window/window_controller.h"
 #include "window/window_lock_widgets.h"
+#include "window/window_outdated_bar.h"
 #include "boxes/confirm_box.h"
 #include "core/click_handler_types.h"
 #include "core/application.h"
@@ -108,6 +109,7 @@ QIcon CreateIcon() {
 
 MainWindow::MainWindow()
 : _positionUpdatedTimer([=] { savePosition(); })
+, _outdated(CreateOutdatedBar(this))
 , _body(this)
 , _icon(CreateIcon())
 , _titleText(qsl("Telegram")) {
@@ -134,6 +136,18 @@ MainWindow::MainWindow()
 		checkLockByTerms();
 	}, lifetime());
 
+	if (_outdated) {
+		_outdated->heightValue(
+		) | rpl::filter([=] {
+			return window()->windowHandle() != nullptr;
+		}) | rpl::start_with_next([=](int height) {
+			if (!height) {
+				crl::on_main(this, [=] { _outdated.destroy(); });
+			}
+			updateControlsGeometry();
+		}, _outdated->lifetime());
+	}
+
 	_isActiveTimer.setCallback([this] { updateIsActive(0); });
 	_inactivePressTimer.setCallback([this] { setInactivePress(false); });
 }
@@ -341,7 +355,14 @@ HitTestResult MainWindow::hitTest(const QPoint &p) const {
 
 int MainWindow::computeMinHeight() const {
 	const auto title = _title ? _title->height() : 0;
-	return title + st::windowMinHeight;
+	const auto outdated = [&] {
+		if (!_outdated) {
+			return 0;
+		}
+		_outdated->resizeToWidth(st::windowMinWidth);
+		return _outdated->height();
+	}();
+	return title + outdated + st::windowMinHeight;
 }
 
 void MainWindow::initSize() {
@@ -446,6 +467,12 @@ void MainWindow::updateControlsGeometry() {
 		_title->setGeometry(0, bodyTop, width(), _title->height());
 		bodyTop += _title->height();
 	}
+	if (_outdated) {
+		Ui::SendPendingMoveResizeEvents(_outdated.data());
+		_outdated->resizeToWidth(width());
+		_outdated->moveToLeft(0, bodyTop);
+		bodyTop += _outdated->height();
+	}
 	if (_rightColumn) {
 		bodyWidth -= _rightColumn->width();
 		_rightColumn->setGeometry(bodyWidth, bodyTop, width() - bodyWidth, height() - bodyTop);