Reset right_boundary row property when row is shortened

Fixes bug #10003.

src/Row.cpp

@@ -413,10 +413,10 @@ void Row::pop_back()
 }
 
 
-void Row::shortenIfNeeded(pos_type const keep, int const w)
+bool Row::shortenIfNeeded(pos_type const keep, int const w)
 {
 	if (empty() || width() <= w)
-		return;
+		return false;
 
 	Elements::iterator const beg = elements_.begin();
 	Elements::iterator const end = elements_.end();
@@ -433,7 +433,7 @@ void Row::shortenIfNeeded(pos_type const keep, int const w)
 	if (cit == end) {
 		// This should not happen since the row is too long.
 		LYXERR0("Something is wrong cannot shorten row: " << *this);
-		return;
+		return false;
 	}
 
 	// Iterate backwards over breakable elements and try to break them
@@ -476,7 +476,7 @@ void Row::shortenIfNeeded(pos_type const keep, int const w)
 			dim_.wid = wid_brk + brk.dim.wid;
 			// If there are other elements, they should be removed.
 			elements_.erase(cit_brk + 1, end);
-			return;
+			return true;
 		}
 	}
 
@@ -493,7 +493,7 @@ void Row::shortenIfNeeded(pos_type const keep, int const w)
 		end_ = cit->pos;
 		dim_.wid = wid;
 		elements_.erase(cit, end);
-		return;
+		return true;
 	}
 
 	/* If we are here, it means that we have not found a separator to
@@ -508,7 +508,9 @@ void Row::shortenIfNeeded(pos_type const keep, int const w)
 		dim_.wid = wid + cit->dim.wid;
 		// If there are other elements, they should be removed.
 		elements_.erase(next(cit, 1), end);
+		return true;
 	}
+	return false;
 }
 
 

src/Row.h

@@ -227,8 +227,9 @@ public:
 	 * remains is a large word, cut it to \param width.
 	 * \param body_pos minimum amount of text to keep.
 	 * \param width maximum width of the row
+	 * \return true if the row has been shortened.
 	 */
-	void shortenIfNeeded(pos_type const body_pos, int const width);
+	bool shortenIfNeeded(pos_type const body_pos, int const width);
 
 	/**
 	 * If last element of the row is a string, compute its width

src/TextMetrics.cpp

@@ -911,8 +911,10 @@ void TextMetrics::breakRow(Row & row, int const right_margin, pit_type const pit
 		row.addVirtual(end, docstring(1, char_type(0x00B6)), f, Change());
 	}
 
-	// if the row is too large, try to cut at last separator.
-	row.shortenIfNeeded(body_pos, width);
+	// if the row is too large, try to cut at last separator. In case
+	// of success, reset indication that the row was broken abruptly.
+	if (row.shortenIfNeeded(body_pos, width))
+		row.right_boundary(false);
 
 	// make sure that the RTL elements are in reverse ordering
 	row.reverseRTL(is_rtl);