diff --git a/src/HTMLTextLine.cc b/src/HTMLTextLine.cc
index 51cd2d8..5d229eb 100644
--- a/src/HTMLTextLine.cc
+++ b/src/HTMLTextLine.cc
@@ -50,7 +50,7 @@ void HTMLTextLine::append_offset(double width)
     if((!offsets.empty()) && (offsets.back().start_idx == text.size()))
         offsets.back().width += width;
     else
-        offsets.emplace_back(text.size(), width);
+        offsets.emplace_back(text.size(), width, this->width);
     this->width += width;
 }
 
@@ -472,16 +472,15 @@ void HTMLTextLine::optimize_normal(std::vector<HTMLTextLine*> & lines)
 // for optimize-text == 3
 void HTMLTextLine::optimize_aggressive(std::vector<HTMLTextLine*> & lines)
 {
-    HTMLTextLine *cur_line = this;
+    HTMLLineState original_line_state = line_state;
+    // break the line if there are a large (positive or negative) shift
+    // letter space / word space are not taken into consideration (yet)
     while(true) 
     {
         lines.push_back(cur_line);
 
-        // break the line if there are a large (positive or negative) shift
-        // letter space / word space are not taken into consideration (yet)
         
 
-        // TODO
     }
 
     /*
diff --git a/src/HTMLTextLine.h b/src/HTMLTextLine.h
index 782b491..8e9b72e 100644
--- a/src/HTMLTextLine.h
+++ b/src/HTMLTextLine.h
@@ -66,11 +66,12 @@ public:
     };
 
     struct Offset {
-        Offset(size_t size_idx, double width)
-            :start_idx(size_idx),width(width)
+        Offset(size_t size_idx, double width, double start_width)
+            :start_idx(size_idx),width(width),start_width(start_width)
         { }
         size_t start_idx; // should put this Offset right before text[start_idx];
         double width;
+        double start_width; // the width of the line before this offset
     };
 
     void append_unicodes(const Unicode * u, int l, double width);