Added counter label of characters limit to send files box.

Telegram/SourceFiles/boxes/send_files_box.cpp

@@ -22,6 +22,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "chat_helpers/tabbed_selector.h"
 #include "editor/photo_editor_layer_widget.h"
 #include "history/history_drag_area.h"
+#include "history/view/controls/history_view_characters_limit.h"
 #include "history/view/history_view_schedule_box.h"
 #include "core/file_utilities.h"
 #include "core/mime_type.h"
@@ -48,6 +49,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "lottie/lottie_single_player.h"
 #include "data/data_document.h"
 #include "data/data_user.h"
+#include "data/data_peer_values.h" // Data::AmPremiumValue.
 #include "data/data_premium_limits.h"
 #include "data/stickers/data_stickers.h"
 #include "data/stickers/data_custom_emoji.h"
@@ -1060,6 +1062,39 @@ void SendFilesBox::setupCaption() {
 
 	updateCaptionPlaceholder();
 	setupEmojiPanel();
+
+	rpl::single(rpl::empty_value()) | rpl::then(
+		_caption->changes()
+	) | rpl::start_with_next([=] {
+		checkCharsLimitation();
+	}, _caption->lifetime());
+}
+
+void SendFilesBox::checkCharsLimitation() {
+	const auto limits = Data::PremiumLimits(&_show->session());
+	const auto caption = (_caption && !_caption->isHidden())
+		? _caption->getTextWithAppliedMarkdown()
+		: TextWithTags();
+	const auto remove = caption.text.size() - limits.captionLengthCurrent();
+	if ((remove > 0) && _emojiToggle) {
+		if (!_charsLimitation) {
+			_charsLimitation = base::make_unique_q<CharactersLimitLabel>(
+				this,
+				_emojiToggle.data(),
+				style::al_top);
+			_charsLimitation->show();
+			Data::AmPremiumValue(
+				&_show->session()
+			) | rpl::start_with_next([=] {
+				checkCharsLimitation();
+			}, _charsLimitation->lifetime());
+		}
+		_charsLimitation->setLeft(remove);
+	} else {
+		if (_charsLimitation) {
+			_charsLimitation = nullptr;
+		}
+	}
 }
 
 void SendFilesBox::setupEmojiPanel() {

Telegram/SourceFiles/boxes/send_files_box.h

@@ -50,6 +50,10 @@ namespace SendMenu {
 enum class Type;
 } // namespace SendMenu
 
+namespace HistoryView::Controls {
+class CharactersLimitLabel;
+} // namespace HistoryView::Controls
+
 enum class SendFilesAllow {
 	OnlyOne = (1 << 0),
 	Photos = (1 << 1),
@@ -221,6 +225,8 @@ private:
 	void enqueueNextPrepare();
 	void addPreparedAsyncFile(Ui::PreparedFile &&file);
 
+	void checkCharsLimitation();
+
 	const std::shared_ptr<ChatHelpers::Show> _show;
 	const style::ComposeControls &_st;
 	const Api::SendType _sendType = Api::SendType();
@@ -244,6 +250,8 @@ private:
 	object_ptr<Ui::EmojiButton> _emojiToggle = { nullptr };
 	base::unique_qptr<ChatHelpers::TabbedPanel> _emojiPanel;
 	base::unique_qptr<QObject> _emojiFilter;
+	using CharactersLimitLabel = HistoryView::Controls::CharactersLimitLabel;
+	base::unique_qptr<CharactersLimitLabel> _charsLimitation;
 
 	object_ptr<Ui::Checkbox> _groupFiles = { nullptr };
 	object_ptr<Ui::Checkbox> _sendImagesAsPhotos = { nullptr };

Telegram/SourceFiles/history/history_widget.cpp

@@ -7319,7 +7319,8 @@ void HistoryWidget::checkCharsLimitation() {
 		if (!_charsLimitation) {
 			_charsLimitation = base::make_unique_q<CharactersLimitLabel>(
 				this,
-				_send.get());
+				_send.get(),
+				style::al_bottom);
 			_charsLimitation->show();
 			Data::AmPremiumValue(
 				&session()

Telegram/SourceFiles/history/view/controls/history_view_characters_limit.cpp

@@ -7,20 +7,30 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 */
 #include "history/view/controls/history_view_characters_limit.h"
 
+#include "ui/rect.h"
 #include "styles/style_chat_helpers.h"
 
 namespace HistoryView::Controls {
 
 CharactersLimitLabel::CharactersLimitLabel(
 	not_null<Ui::RpWidget*> parent,
-	not_null<Ui::RpWidget*> widgetBelow)
+	not_null<Ui::RpWidget*> widgetToAlign,
+	style::align align)
 : Ui::FlatLabel(parent, st::historyCharsLimitationLabel) {
+	Expects((align == style::al_top) || align == style::al_bottom);
+	const auto w = st::historyCharsLimitationLabel.minWidth;
+	using F = Fn<void(int, const QRect &)>;
+	const auto position = (align == style::al_top)
+		? F([=](int height, const QRect &g) {
+			move(g.x() + (g.width() - w) / 2, rect::bottom(g));
+		})
+		: F([=](int height, const QRect &g) {
+			move(g.x() + (g.width() - w) / 2, g.y() - height);
+		});
 	rpl::combine(
 		Ui::RpWidget::heightValue(),
-		widgetBelow->positionValue()
-	) | rpl::start_with_next([=](int height, const QPoint &p) {
-		move(p.x(), p.y() - height);
-	}, lifetime());
+		widgetToAlign->geometryValue()
+	) | rpl::start_with_next(position, lifetime());
 }
 
 void CharactersLimitLabel::setLeft(int value) {

Telegram/SourceFiles/history/view/controls/history_view_characters_limit.h

@@ -15,7 +15,8 @@ class CharactersLimitLabel final : public Ui::FlatLabel {
 public:
 	CharactersLimitLabel(
 		not_null<Ui::RpWidget*> parent,
-		not_null<Ui::RpWidget*> widgetBelow);
+		not_null<Ui::RpWidget*> widgetToAlign,
+		style::align align);
 
 	void setLeft(int value);
 

Telegram/SourceFiles/history/view/controls/history_view_compose_controls.cpp

@@ -3322,7 +3322,8 @@ void ComposeControls::checkCharsLimitation() {
 			using namespace Controls;
 			_charsLimitation = base::make_unique_q<CharactersLimitLabel>(
 				_wrap.get(),
-				_send.get());
+				_send.get(),
+				style::al_bottom);
 			_charsLimitation->show();
 			Data::AmPremiumValue(
 				&session()