Focus existing location picker.

Telegram/SourceFiles/data/components/location_pickers.cpp

@@ -0,0 +1,44 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "data/components/location_pickers.h"
+
+#include "api/api_common.h"
+#include "ui/controls/location_picker.h"
+
+namespace Data {
+
+struct LocationPickers::Entry {
+	Api::SendAction action;
+	base::weak_ptr<Ui::LocationPicker> picker;
+};
+
+LocationPickers::LocationPickers() = default;
+
+LocationPickers::~LocationPickers() = default;
+
+Ui::LocationPicker *LocationPickers::lookup(const Api::SendAction &action) {
+	for (auto i = begin(_pickers); i != end(_pickers);) {
+		if (const auto strong = i->picker.get()) {
+			if (i->action == action) {
+				return i->picker.get();
+			}
+			++i;
+		} else {
+			i = _pickers.erase(i);
+		}
+	}
+	return nullptr;
+}
+
+void LocationPickers::emplace(
+		const Api::SendAction &action,
+		not_null<Ui::LocationPicker*> picker) {
+	_pickers.push_back({ action, picker });
+}
+
+} // namespace Data

Telegram/SourceFiles/data/components/location_pickers.h

@@ -0,0 +1,39 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "base/weak_ptr.h"
+
+namespace Api {
+struct SendAction;
+} // namespace Api
+
+namespace Ui {
+class LocationPicker;
+} // namespace Ui
+
+namespace Data {
+
+class LocationPickers final {
+public:
+	LocationPickers();
+	~LocationPickers();
+
+	Ui::LocationPicker *lookup(const Api::SendAction &action);
+	void emplace(
+		const Api::SendAction &action,
+		not_null<Ui::LocationPicker*> picker);
+
+private:
+	struct Entry;
+
+	std::vector<Entry> _pickers;
+
+};
+
+} // namespace Data