Exposed text selection methods on MediaGenericPart and text part.

Telegram/SourceFiles/history/view/media/history_view_media_generic.cpp

@@ -55,6 +55,21 @@ auto MediaGenericPart::stickerTakePlayer(
 	return nullptr;
 }
 
+uint16 MediaGenericPart::fullSelectionLength() const {
+	return 0;
+}
+
+TextSelection MediaGenericPart::adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const {
+	return selection;
+}
+
+TextForMimeData MediaGenericPart::selectedText(
+		TextSelection selection) const {
+	return {};
+}
+
 MediaGeneric::MediaGeneric(
 	not_null<Element*> parent,
 	Fn<void(
@@ -282,6 +297,7 @@ void MediaGenericTextPart::draw(
 		.now = context.now,
 		.pausedEmoji = context.paused || On(PowerSaving::kEmojiChat),
 		.pausedSpoiler = context.paused || On(PowerSaving::kChatSpoiler),
+		.selection = context.selection,
 		.elisionLines = elisionLines(),
 	});
 }
@@ -311,11 +327,24 @@ TextState MediaGenericTextPart::textState(
 			: _margins.left()),
 		_margins.top(),
 	};
-	auto result = TextState();
 	auto forText = request.forText();
 	forText.align = _align;
-	result.link = _text.getState(point, use, forText).link;
-	return result;
+	return TextState(nullptr, _text.getState(point, use, forText));
+}
+
+uint16 MediaGenericTextPart::fullSelectionLength() const {
+	return _text.length();
+}
+
+TextSelection MediaGenericTextPart::adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const {
+	return _text.adjustSelection(selection, type);
+}
+
+TextForMimeData MediaGenericTextPart::selectedText(
+		TextSelection selection) const {
+	return _text.toTextForMimeData(selection);
 }
 
 QSize MediaGenericTextPart::countOptimalSize() {

Telegram/SourceFiles/history/view/media/history_view_media_generic.h

@@ -55,6 +55,13 @@ public:
 		not_null<DocumentData*> data,
 		const Lottie::ColorReplacements *replacements
 	) -> std::unique_ptr<StickerPlayer>;
+
+	[[nodiscard]] virtual uint16 fullSelectionLength() const;
+	[[nodiscard]] virtual TextSelection adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const;
+	[[nodiscard]] virtual TextForMimeData selectedText(
+		TextSelection selection) const;
 };
 
 struct MediaGenericDescriptor {
@@ -158,6 +165,13 @@ public:
 		StateRequest request,
 		int outerWidth) const override;
 
+	[[nodiscard]] uint16 fullSelectionLength() const override;
+	[[nodiscard]] TextSelection adjustSelection(
+		TextSelection selection,
+		TextSelectType type) const override;
+	[[nodiscard]] TextForMimeData selectedText(
+		TextSelection selection) const override;
+
 	QSize countOptimalSize() override;
 	QSize countCurrentSize(int newWidth) override;