Add FieldAutocomplete to SendFilesBox.

Telegram/SourceFiles/boxes/send_files_box.cpp

@@ -19,6 +19,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "chat_helpers/message_field.h"
 #include "menu/menu_send.h"
 #include "chat_helpers/emoji_suggestions_widget.h"
+#include "chat_helpers/field_autocomplete.h"
 #include "chat_helpers/tabbed_panel.h"
 #include "chat_helpers/tabbed_selector.h"
 #include "editor/photo_editor_layer_widget.h"
@@ -1273,6 +1274,7 @@ void SendFilesBox::setupCaption() {
 		[=] { return show->paused(Window::GifPauseReason::Layer); },
 		allow,
 		&_st.files.caption);
+	setupCaptionAutocomplete();
 	Ui::Emoji::SuggestionsController::Init(
 		getDelegate()->outerContainer(),
 		_caption,
@@ -1332,6 +1334,60 @@ void SendFilesBox::setupCaption() {
 	}, _caption->lifetime());
 }
 
+void SendFilesBox::setupCaptionAutocomplete() {
+	if (!_captionToPeer || !_caption) {
+		return;
+	}
+	const auto parent = getDelegate()->outerContainer();
+	ChatHelpers::InitFieldAutocomplete(_autocomplete, {
+		.parent = parent,
+		.show = _show,
+		.field = _caption.data(),
+		.peer = _captionToPeer,
+		.features = [=] {
+			auto result = ChatHelpers::ComposeFeatures();
+			result.autocompleteCommands = false;
+			result.suggestStickersByEmoji = false;
+			return result;
+		},
+		.sendMenuDetails = _sendMenuDetails,
+	});
+	const auto raw = _autocomplete.get();
+	const auto scheduled = std::make_shared<bool>();
+	const auto recountPostponed = [=] {
+		if (*scheduled) {
+			return;
+		}
+		*scheduled = true;
+		Ui::PostponeCall(raw, [=] {
+			*scheduled = false;
+
+			auto full = parent->rect();
+			auto field = Ui::MapFrom(parent, this, _caption->geometry());
+			_autocomplete->setBoundings(QRect(
+				field.x() - _caption->x(),
+				st::defaultBox.margin.top(),
+				width(),
+				(field.y()
+					+ _st.files.caption.textMargins.top()
+					+ _st.files.caption.placeholderShift
+					+ _st.files.caption.placeholderFont->height
+					- st::defaultBox.margin.top())));
+		});
+	};
+	for (auto w = (QWidget*)_caption.data(); w; w = w->parentWidget()) {
+		base::install_event_filter(raw, w, [=](not_null<QEvent*> e) {
+			if (e->type() == QEvent::Move || e->type() == QEvent::Resize) {
+				recountPostponed();
+			}
+			return base::EventFilterResult::Continue;
+		});
+		if (w == parent) {
+			break;
+		}
+	}
+}
+
 void SendFilesBox::checkCharsLimitation() {
 	const auto limits = Data::PremiumLimits(&_show->session());
 	const auto caption = (_caption && !_caption->isHidden())
@@ -1647,6 +1703,14 @@ void SendFilesBox::updateControlsGeometry() {
 	_scroll->move(0, _titleHeight.current());
 }
 
+void SendFilesBox::showFinished() {
+	if (const auto raw = _autocomplete.get()) {
+		InvokeQueued(raw, [=] {
+			raw->raise();
+		});
+	}
+}
+
 void SendFilesBox::setInnerFocus() {
 	if (_caption && !_caption->isHidden()) {
 		_caption->setFocusFast();

Telegram/SourceFiles/boxes/send_files_box.h

@@ -28,6 +28,7 @@ enum class SendType;
 namespace ChatHelpers {
 class TabbedPanel;
 class Show;
+class FieldAutocomplete;
 } // namespace ChatHelpers
 
 namespace Ui {
@@ -126,6 +127,8 @@ public:
 		_cancelledCallback = std::move(callback);
 	}
 
+	void showFinished() override;
+
 	~SendFilesBox();
 
 protected:
@@ -206,6 +209,7 @@ private:
 	void refreshControls(bool initial = false);
 	void setupSendWayControls();
 	void setupCaption();
+	void setupCaptionAutocomplete();
 
 	void setupEmojiPanel();
 	void updateSendWayControls();
@@ -257,6 +261,7 @@ private:
 	SendFilesLimits _limits = {};
 	Fn<MenuDetails()> _sendMenuDetails;
 	Fn<void(MenuAction, MenuDetails)> _sendMenuCallback;
+
 	PeerData *_captionToPeer = nullptr;
 	SendFilesCheck _check;
 	SendFilesConfirmed _confirmedCallback;
@@ -268,6 +273,7 @@ private:
 	bool _invertCaption = false;
 
 	object_ptr<Ui::InputField> _caption = { nullptr };
+	std::unique_ptr<ChatHelpers::FieldAutocomplete> _autocomplete;
 	TextWithTags _prefilledCaptionText;
 	object_ptr<Ui::EmojiButton> _emojiToggle = { nullptr };
 	base::unique_qptr<ChatHelpers::TabbedPanel> _emojiPanel;

Telegram/SourceFiles/chat_helpers/field_autocomplete.cpp

@@ -1684,12 +1684,16 @@ void InitFieldAutocomplete(
 	}, raw->lifetime());
 
 	const auto peer = descriptor.peer;
+	const auto features = descriptor.features;
 	const auto processShortcut = descriptor.processShortcut;
 	const auto shortcutMessages = (processShortcut != nullptr)
 		? &peer->owner().shortcutMessages()
 		: nullptr;
 	raw->botCommandChosen(
 	) | rpl::start_with_next([=](FieldAutocomplete::BotCommandChosen data) {
+		if (!features().autocompleteCommands) {
+			return;
+		}
 		using Method = FieldAutocompleteChooseMethod;
 		const auto byTab = (data.method == Method::ByTab);
 		const auto shortcut = data.user->isSelf();
@@ -1708,16 +1712,17 @@ void InitFieldAutocomplete(
 
 	raw->setModerateKeyActivateCallback(std::move(descriptor.moderateKeyActivateCallback));
 
-	const auto stickerChoosing = descriptor.stickerChoosing;
-	raw->choosingProcesses(
-	) | rpl::start_with_next([=](FieldAutocomplete::Type type) {
-		if (type == FieldAutocomplete::Type::Stickers) {
-			stickerChoosing();
-		}
-	}, raw->lifetime());
-	if (auto chosen = descriptor.stickerChosen) {
+	if (const auto stickerChoosing = descriptor.stickerChoosing) {
+		raw->choosingProcesses(
+		) | rpl::start_with_next([=](FieldAutocomplete::Type type) {
+			if (type == FieldAutocomplete::Type::Stickers) {
+				stickerChoosing();
+			}
+		}, raw->lifetime());
+	}
+	if (const auto chosen = descriptor.stickerChosen) {
 		raw->stickerChosen(
-		) | rpl::start_with_next(std::move(chosen), raw->lifetime());
+		) | rpl::start_with_next(chosen, raw->lifetime());
 	}
 
 	field->tabbed(
@@ -1727,7 +1732,6 @@ void InitFieldAutocomplete(
 		}
 	}, raw->lifetime());
 
-	const auto features = descriptor.features;
 	const auto check = [=] {
 		auto parsed = ParseMentionHashtagBotCommandQuery(field, features());
 		if (parsed.query.isEmpty()) {