From 7252e9b26634d613a0ff0a23eeec0a427c8e1d41 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Sat, 26 May 2018 18:39:13 +0300
Subject: [PATCH] Apply max length limit to initial text.

---
 .../SourceFiles/ui/widgets/input_fields.cpp    | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/Telegram/SourceFiles/ui/widgets/input_fields.cpp b/Telegram/SourceFiles/ui/widgets/input_fields.cpp
index 0e96a53da..7f36bc8f4 100644
--- a/Telegram/SourceFiles/ui/widgets/input_fields.cpp
+++ b/Telegram/SourceFiles/ui/widgets/input_fields.cpp
@@ -1217,7 +1217,23 @@ void InputField::setAdditionalMargin(int margin) {
 }
 
 void InputField::setMaxLength(int length) {
-	_maxLength = length;
+	if (_maxLength != length) {
+		_maxLength = length;
+		if (_maxLength > 0) {
+			const auto document = _inner->document();
+			_correcting = true;
+			QTextCursor(document->docHandle(), 0).joinPreviousEditBlock();
+			const auto guard = gsl::finally([&] {
+				_correcting = false;
+				QTextCursor(document->docHandle(), 0).endEditBlock();
+				handleContentsChanged();
+			});
+
+			auto cursor = QTextCursor(document->docHandle(), 0);
+			cursor.movePosition(QTextCursor::End);
+			chopByMaxLength(0, cursor.position());
+		}
+	}
 }
 
 void InputField::setMinHeight(int height) {