Bug 1623764 - Part 3: Expose IsLineWrapped via LineInfo r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D85922

layout/generic/nsILineIterator.h

@@ -56,6 +56,8 @@ class nsILineIterator {
      * positioning then its coordinates may be outside the line bounds)
      */
     nsRect mLineBounds;
+    /** Whether the line is wrapped at the end */
+    bool mIsWrapped;
   };
 
   // Return miscellaneous information about a line.

layout/generic/nsLineBox.cpp

@@ -617,6 +617,7 @@ Result<nsILineIterator::LineInfo, nsresult> nsLineIterator::GetLine(
   structure.mFirstFrameOnLine = line->mFirstChild;
   structure.mNumFramesOnLine = line->GetChildCount();
   structure.mLineBounds = line->GetPhysicalBounds();
+  structure.mIsWrapped = line->IsLineWrapped();
   return structure;
 }