From 57438867b6b3c83f048772da5ce518497f11a703 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 30 Sep 2024 14:45:55 +0400
Subject: [PATCH] Respect the maximum quote length.

---
 Telegram/Resources/langs/lang.strings                  |  2 ++
 .../view/controls/history_view_draft_options.cpp       | 10 +++++++++-
 .../SourceFiles/history/view/history_view_element.cpp  |  9 ++++++++-
 .../SourceFiles/history/view/history_view_element.h    |  1 +
 Telegram/SourceFiles/main/main_app_config.cpp          |  4 ++++
 Telegram/SourceFiles/main/main_app_config.h            |  2 ++
 6 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Telegram/Resources/langs/lang.strings b/Telegram/Resources/langs/lang.strings
index b1ec14723..0da7bbf62 100644
--- a/Telegram/Resources/langs/lang.strings
+++ b/Telegram/Resources/langs/lang.strings
@@ -3611,6 +3611,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 "lng_reply_header_short" = "Reply";
 "lng_reply_quote_selected" = "Quote Selected";
 "lng_reply_from_private_chat" = "This reply is from a private chat.";
+"lng_reply_quote_long_title" = "Quote too long!";
+"lng_reply_quote_long_text" = "The selected text is too long to quote.";
 "lng_link_options_header" = "Link Preview Settings";
 "lng_link_header_short" = "Link";
 "lng_link_move_up" = "Move Up";
diff --git a/Telegram/SourceFiles/history/view/controls/history_view_draft_options.cpp b/Telegram/SourceFiles/history/view/controls/history_view_draft_options.cpp
index 5927e14cf..c680d6a23 100644
--- a/Telegram/SourceFiles/history/view/controls/history_view_draft_options.cpp
+++ b/Telegram/SourceFiles/history/view/controls/history_view_draft_options.cpp
@@ -35,6 +35,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "ui/widgets/buttons.h"
 #include "ui/widgets/discrete_sliders.h"
 #include "ui/painter.h"
+#include "ui/toast/toast.h"
 #include "ui/vertical_list.h"
 #include "ui/ui_utility.h"
 #include "window/themes/window_theme.h"
@@ -843,7 +844,14 @@ void DraftOptionsBox(
 			: tr::lng_reply_quote_selected();
 	}) | rpl::flatten_latest();
 	box->addButton(std::move(save), [=] {
-		finish(resolveReply(), state->webpage);
+		if (state->quote.current().overflown) {
+			show->showToast({
+				.title = tr::lng_reply_quote_long_title(tr::now),
+				.text = tr::lng_reply_quote_long_text(tr::now),
+				});
+		} else {
+			finish(resolveReply(), state->webpage);
+		}
 	});
 
 	box->addButton(tr::lng_cancel(), [=] {
diff --git a/Telegram/SourceFiles/history/view/history_view_element.cpp b/Telegram/SourceFiles/history/view/history_view_element.cpp
index 883b51a5a..1828f56ce 100644
--- a/Telegram/SourceFiles/history/view/history_view_element.cpp
+++ b/Telegram/SourceFiles/history/view/history_view_element.cpp
@@ -27,6 +27,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "core/core_settings.h"
 #include "core/click_handler_types.h"
 #include "core/ui_integration.h"
+#include "main/main_app_config.h"
 #include "main/main_session.h"
 #include "chat_helpers/stickers_emoji_pack.h"
 #include "window/window_session_controller.h"
@@ -1652,6 +1653,12 @@ SelectedQuote Element::FindSelectedQuote(
 	if (modified.empty() || modified.to > result.text.size()) {
 		return {};
 	}
+	const auto session = &item->history()->session();
+	const auto limit = session->appConfig().quoteLengthMax();
+	const auto overflown = (modified.from + limit < modified.to);
+	if (overflown) {
+		modified.to = modified.from + limit;
+	}
 	result.text = result.text.mid(
 		modified.from,
 		modified.to - modified.from);
@@ -1678,7 +1685,7 @@ SelectedQuote Element::FindSelectedQuote(
 			++i;
 		}
 	}
-	return { item, result, modified.from };
+	return { item, result, modified.from, overflown };
 }
 
 TextSelection Element::FindSelectionFromQuote(
diff --git a/Telegram/SourceFiles/history/view/history_view_element.h b/Telegram/SourceFiles/history/view/history_view_element.h
index 1d52d7925..d1ef6c282 100644
--- a/Telegram/SourceFiles/history/view/history_view_element.h
+++ b/Telegram/SourceFiles/history/view/history_view_element.h
@@ -294,6 +294,7 @@ struct SelectedQuote {
 	HistoryItem *item = nullptr;
 	TextWithEntities text;
 	int offset = 0;
+	bool overflown = false;
 
 	explicit operator bool() const {
 		return item && !text.empty();
diff --git a/Telegram/SourceFiles/main/main_app_config.cpp b/Telegram/SourceFiles/main/main_app_config.cpp
index 11e81958c..dc5f6d51f 100644
--- a/Telegram/SourceFiles/main/main_app_config.cpp
+++ b/Telegram/SourceFiles/main/main_app_config.cpp
@@ -38,6 +38,10 @@ void AppConfig::start() {
 	}, _lifetime);
 }
 
+int AppConfig::quoteLengthMax() const {
+	return get<int>(u"quote_length_max"_q, 1024);
+}
+
 void AppConfig::refresh(bool force) {
 	if (_requestId || !_api) {
 		if (force) {
diff --git a/Telegram/SourceFiles/main/main_app_config.h b/Telegram/SourceFiles/main/main_app_config.h
index 09fe65ea1..fc02858a3 100644
--- a/Telegram/SourceFiles/main/main_app_config.h
+++ b/Telegram/SourceFiles/main/main_app_config.h
@@ -63,6 +63,8 @@ public:
 		return _ignoreRestrictionChanges.events();
 	}
 
+	[[nodiscard]] int quoteLengthMax() const;
+
 	void refresh(bool force = false);
 
 private: