diff --git a/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.cpp b/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.cpp
index 484338c..569f634 100644
--- a/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.cpp
+++ b/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.cpp
@@ -196,3 +196,12 @@ void ZLTextArea::paint() {
 		++index;
 	}
 }
+
+bool ZLTextArea::isVisible() const {
+	for (std::vector<ZLTextLineInfoPtr>::const_iterator it = myLineInfos.begin(); it != myLineInfos.end(); ++it) {
+		if ((*it)->IsVisible) {
+			return true;
+		}
+	}
+	return false;
+}
diff --git a/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.h b/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.h
index 261485c..faebf99 100644
--- a/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.h
+++ b/fbreader/fbreader/zlibrary/text/src/area/ZLTextArea.h
@@ -74,6 +74,7 @@ public:
 	const ZLTextWordCursor &startCursor() const;
 	const ZLTextWordCursor &endCursor() const;
 	bool isEmpty() const;
+	bool isVisible() const;
 
 	const ZLTextElementRectangle *elementByCoordinates(int x, int y, bool absolute = true) const;
 	const ZLTextTreeNodeRectangle *treeNodeByCoordinates(int x, int y, bool absolute = true) const;