[Improvement] Allow to search messages from user

Telegram/Resources/langs/rewrites/en.json

@@ -98,6 +98,7 @@
 	"ktg_hide_pinned_message": "Hide",
 	"ktg_stickers_copy_title": "Copy name",
 	"ktg_stickers_title_copied": "Sticker pack name copied to clipboard.",
+	"ktg_context_show_messages_from": "User messages",
 	"ktg_settings_tray_icon": "Tray icon",
 	"ktg_settings_tray_icon_default": "Default",
 	"ktg_settings_tray_icon_blue": "Blue",

Telegram/SourceFiles/boxes/peers/edit_participants_box.cpp

@@ -7,6 +7,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "boxes/peers/edit_participants_box.h"
 
+#include "kotato/kotato_lang.h"
+#include "core/application.h"
 #include "api/api_chat_participants.h"
 #include "boxes/peer_list_controllers.h"
 #include "boxes/peers/edit_participant_box.h"
@@ -21,6 +23,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "mtproto/mtproto_config.h"
 #include "apiwrap.h"
 #include "lang/lang_keys.h"
+#include "mainwindow.h"
 #include "mainwidget.h"
 #include "dialogs/dialogs_indexed_list.h"
 #include "data/data_peer_values.h"
@@ -33,6 +36,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/popup_menu.h"
 #include "ui/ui_utility.h"
 #include "info/profile/info_profile_values.h"
+#include "window/window_controller.h"
 #include "window/window_session_controller.h"
 #include "history/history.h"
 #include "styles/style_menu_icons.h"
@@ -1598,6 +1602,20 @@ base::unique_qptr<Ui::PopupMenu> ParticipantsBoxController::rowContextMenu(
 				? &st::menuIconProfile
 				: &st::menuIconInfo));
 	}
+	if (const auto window = _navigation->parentController()) {
+		if (const auto mainwidget = window->widget()->sessionContent()) {
+			result->addAction(
+				ktr("ktg_context_show_messages_from"),
+				crl::guard(this, [=] {
+					mainwidget->searchMessages(
+						" ",
+						(_peer && !_peer->isUser())
+							? _peer->owner().history(_peer).get()
+							: Dialogs::Key(),
+							user);
+				}), &st::menuIconSearch);
+		}
+	}
 	if (_role == Role::Kicked) {
 		if (_peer->isMegagroup()
 			&& _additional.canRestrictParticipant(participant)) {

Telegram/SourceFiles/dialogs/dialogs_widget.cpp

@@ -35,6 +35,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "mainwidget.h"
 #include "main/main_domain.h"
 #include "main/main_session.h"
+#include "main/main_account.h"
 #include "main/main_session_settings.h"
 #include "api/api_chat_filters.h"
 #include "apiwrap.h"
@@ -1524,7 +1525,10 @@ void Widget::showMainMenu() {
 	controller()->widget()->showMainMenu();
 }
 
-void Widget::searchMessages(const QString &query, Key inChat) {
+void Widget::searchMessages(
+		const QString &query,
+		Key inChat,
+		UserData *from) {
 	if (_childList) {
 		const auto forum = controller()->shownForum().current();
 		const auto topic = inChat.topic();
@@ -1565,13 +1569,19 @@ void Widget::searchMessages(const QString &query, Key inChat) {
 			cancelSearch();
 			setSearchInChat(inChat);
 		}
-		setSearchQuery(query);
+		if (!query.trimmed().isEmpty()) {
+			setSearchQuery(query);
+		}
 		applyFilterUpdate(true);
 		_searchTimer.cancel();
 		searchMessages();
 
 		session().local().saveRecentSearchHashtags(query);
 	}
+	if (inChat && from) {
+		setSearchInChat(inChat, from);
+		applyFilterUpdate(true);
+	}
 }
 
 void Widget::searchTopics() {

Telegram/SourceFiles/dialogs/dialogs_widget.h

@@ -106,7 +106,7 @@ public:
 
 	void scrollToEntry(const RowDescriptor &entry);
 
-	void searchMessages(const QString &query, Key inChat = {});
+	void searchMessages(const QString &query, Key inChat = {}, UserData *from = nullptr);
 	void searchTopics();
 	void searchMore();
 

Telegram/SourceFiles/history/history_inner_widget.cpp

@@ -8,6 +8,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "history/history_inner_widget.h"
 
 #include "kotato/kotato_settings.h"
+#include "kotato/kotato_lang.h"
+#include "mainwidget.h"
 #include "core/file_utilities.h"
 #include "core/crash_reports.h"
 #include "core/click_handler_types.h"
@@ -2233,6 +2235,17 @@ void HistoryInner::showContextMenu(QContextMenuEvent *e, bool showFromTouch) {
 				Window::ToggleMessagePinned(controller, pinItemId, !isPinned);
 			}), isPinned ? &st::menuIconUnpin : &st::menuIconPin);
 		}
+		const auto peer = item->history()->peer;
+		if (peer->isChat() || peer->isMegagroup()) {
+			_menu->addAction(ktr("ktg_context_show_messages_from"), [=] {
+				controller->content()->searchMessages(
+					" ",
+					(peer && !peer->isUser())
+						? peer->owner().history(peer).get()
+						: Dialogs::Key(),
+						item->from()->asUser());
+			}, &st::menuIconSearch);
+		}
 	};
 	const auto addPhotoActions = [&](not_null<PhotoData*> photo, HistoryItem *item) {
 		const auto media = photo->activeMediaView();

Telegram/SourceFiles/mainwidget.cpp

@@ -751,9 +751,9 @@ void MainWidget::hideSingleUseKeyboard(PeerData *peer, MsgId replyTo) {
 	_history->hideSingleUseKeyboard(peer, replyTo);
 }
 
-void MainWidget::searchMessages(const QString &query, Dialogs::Key inChat) {
+void MainWidget::searchMessages(const QString &query, Dialogs::Key inChat, UserData *from) {
 	if (controller()->isPrimary()) {
-		_dialogs->searchMessages(query, inChat);
+		_dialogs->searchMessages(query, inChat, from);
 		if (isOneColumn()) {
 			_controller->clearSectionStack();
 		} else {
@@ -762,7 +762,7 @@ void MainWidget::searchMessages(const QString &query, Dialogs::Key inChat) {
 	} else {
 		const auto searchIn = [&](not_null<Window::Controller*> window) {
 			if (const auto controller = window->sessionController()) {
-				controller->content()->searchMessages(query, inChat);
+				controller->content()->searchMessages(query, inChat, from);
 				controller->widget()->activate();
 			}
 		};

Telegram/SourceFiles/mainwidget.h

@@ -190,7 +190,7 @@ public:
 	void sendBotCommand(Bot::SendCommandRequest request);
 	void hideSingleUseKeyboard(PeerData *peer, MsgId replyTo);
 
-	void searchMessages(const QString &query, Dialogs::Key inChat);
+	void searchMessages(const QString &query, Dialogs::Key inChat, UserData *from = nullptr);
 
 	void setChatBackground(
 		const Data::WallPaper &background,