Added external commands to list, activate and cycle windows.

Telegram/SourceFiles/core/external_control.cpp

@@ -8,13 +8,22 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "core/external_control.h"
 
 #include "core/application.h"
+#include "window/window_controller.h"
 
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QWidget>
+#include <QtCore/QJsonArray>
 #include <QtCore/QJsonDocument>
 #include <QtCore/QJsonObject>
 
 namespace Core {
 namespace {
 
+struct WindowEntry {
+	not_null<Window::Controller*> controller;
+	QWidget *window = nullptr;
+};
+
 [[nodiscard]] QByteArray Pack(QJsonObject object) {
 	return QJsonDocument(object).toJson(QJsonDocument::Compact);
 }
@@ -26,6 +35,84 @@ namespace {
 	return Pack(object);
 }
 
+[[nodiscard]] std::vector<WindowEntry> CollectWindows() {
+	auto result = std::vector<WindowEntry>();
+	for (const auto widget : QApplication::topLevelWidgets()) {
+		const auto controller = App().findWindow(widget);
+		if (!controller) {
+			continue;
+		}
+		auto already = false;
+		for (const auto &entry : result) {
+			if (entry.controller.get() == controller) {
+				already = true;
+				break;
+			}
+		}
+		if (!already) {
+			result.push_back({ controller, widget->window() });
+		}
+	}
+	ranges::sort(result, [](const WindowEntry &a, const WindowEntry &b) {
+		if (a.controller->isPrimary() != b.controller->isPrimary()) {
+			return a.controller->isPrimary();
+		}
+		return a.controller.get() < b.controller.get();
+	});
+	return result;
+}
+
+[[nodiscard]] QByteArray HandleWindows() {
+	const auto active = App().activeWindow();
+	auto list = QJsonArray();
+	auto index = 0;
+	for (const auto &entry : CollectWindows()) {
+		auto object = QJsonObject();
+		object.insert(u"id"_q, index++);
+		object.insert(u"title"_q, entry.window->windowTitle());
+		object.insert(u"primary"_q, entry.controller->isPrimary());
+		object.insert(u"active"_q, (entry.controller.get() == active));
+		list.append(object);
+	}
+	auto object = QJsonObject();
+	object.insert(u"ok"_q, true);
+	object.insert(u"windows"_q, list);
+	return Pack(object);
+}
+
+[[nodiscard]] QByteArray HandleActivate(int index) {
+	const auto windows = CollectWindows();
+	if (index < 0 || index >= int(windows.size())) {
+		return Error(u"no such window"_q);
+	}
+	windows[index].controller->activate();
+	auto object = QJsonObject();
+	object.insert(u"ok"_q, true);
+	object.insert(u"activated"_q, index);
+	return Pack(object);
+}
+
+[[nodiscard]] QByteArray HandleCycle() {
+	const auto windows = CollectWindows();
+	if (windows.empty()) {
+		return Error(u"no windows"_q);
+	}
+	const auto active = App().activeWindow();
+	auto current = 0;
+	for (auto i = 0, count = int(windows.size()); i != count; ++i) {
+		if (windows[i].controller.get() == active) {
+			current = i;
+			break;
+		}
+	}
+	const auto next = (current + 1) % int(windows.size());
+	windows[next].controller->activate();
+	auto object = QJsonObject();
+	object.insert(u"ok"_q, true);
+	object.insert(u"activated"_q, next);
+	return Pack(object);
+}
+
 } // namespace
 
 QByteArray HandleExternalControl(const QString &command) {
@@ -36,6 +123,12 @@ QByteArray HandleExternalControl(const QString &command) {
 		object.insert(u"ok"_q, true);
 		object.insert(u"result"_q, u"pong"_q);
 		return Pack(object);
+	} else if (command == u"windows"_q) {
+		return HandleWindows();
+	} else if (command.startsWith(u"activate:"_q)) {
+		return HandleActivate(command.mid(9).toInt());
+	} else if (command == u"cycle"_q) {
+		return HandleCycle();
 	}
 	return Error(u"unknown control command"_q);
 }