Refactor EDA_TEXT::TransformToSegmentList() to return a vector of points

This allows reading text object as it is rendered through python API.

common/eda_text.cpp

@@ -50,6 +50,7 @@
 #include <i18n_utility.h>
 #include <geometry/shape_segment.h>
 #include <geometry/shape_compound.h>
+#include <geometry/shape_poly_set.h>
 
 
 #include <wx/debug.h>         // for wxASSERT
@@ -580,8 +581,9 @@ static void addTextSegmToBuffer( int x0, int y0, int xf, int yf, void* aData )
 }
 
 
-void EDA_TEXT::TransformTextShapeToSegmentList( std::vector<wxPoint>& aCornerBuffer ) const
+std::vector<wxPoint> EDA_TEXT::TransformToSegmentList() const
 {
+    std::vector<wxPoint> cornerBuffer;
     wxSize size = GetTextSize();
 
     if( IsMirrored() )
@@ -605,15 +607,17 @@ void EDA_TEXT::TransformTextShapeToSegmentList( std::vector<wxPoint>& aCornerBuf
             wxString txt = strings_list.Item( ii );
             GRText( NULL, positions[ii], color, txt, GetDrawRotation(), size, GetHorizJustify(),
                     GetVertJustify(), penWidth, IsItalic(), forceBold, addTextSegmToBuffer,
-                    &aCornerBuffer );
+                    &cornerBuffer );
         }
     }
     else
     {
         GRText( NULL, GetTextPos(), color, GetText(), GetDrawRotation(), size, GetHorizJustify(),
                 GetVertJustify(), penWidth, IsItalic(), forceBold, addTextSegmToBuffer,
-                &aCornerBuffer );
+                &cornerBuffer );
     }
+
+    return cornerBuffer;
 }
 
 
@@ -621,8 +625,7 @@ std::shared_ptr<SHAPE_COMPOUND> EDA_TEXT::GetEffectiveTextShape( ) const
 {
     std::shared_ptr<SHAPE_COMPOUND> shape = std::make_shared<SHAPE_COMPOUND>();
     int penWidth = GetEffectiveTextPenWidth();
-    std::vector<wxPoint> pts;
-    TransformTextShapeToSegmentList( pts );
+    std::vector<wxPoint> pts = TransformToSegmentList();
 
     for( unsigned jj = 0; jj < pts.size(); jj += 2 )
         shape->AddShape( new SHAPE_SEGMENT( pts[jj], pts[jj+1], penWidth ) );

include/eda_text.h

@@ -280,10 +280,8 @@ public:
      *
      * Each segment is stored as 2 wxPoints: the starting point and the ending point
      * there are therefore 2*n points.
-     *
-     * @param aCornerBuffer = a buffer to store the polygon
      */
-    void TransformTextShapeToSegmentList( std::vector<wxPoint>& aCornerBuffer ) const;
+    std::vector<wxPoint> TransformToSegmentList() const;
 
     /**
      * Convert the text bounding box to a rectangular polygon depending on the text

pcbnew/router/pns_kicad_iface.cpp

@@ -991,9 +991,7 @@ bool PNS_KICAD_IFACE_BASE::syncTextItem( PNS::NODE* aWorld, EDA_TEXT* aText, PCB
         return false;
 
     int textWidth = aText->GetEffectiveTextPenWidth();
-    std::vector<wxPoint> textShape;
-
-    aText->TransformTextShapeToSegmentList( textShape );
+    std::vector<wxPoint> textShape = aText->TransformToSegmentList();
 
     if( textShape.size() < 2 )
         return false;

qa/testcases/test_001_pcb_load.py

@@ -60,6 +60,24 @@ class TestPCBLoad(unittest.TestCase):
         self.verify_text(text[1], 176149000, 64643000, pcbnew.B_Cu,
                          u'Actionneur\nPiezo New Amp\nV02')
 
+    def test_text_as_segments(self):
+        footprint = self.pcb.FindFootprintByReference("U1")
+        reference = footprint.Reference()
+        segments = [[p.x, p.y] for p in reference.TransformToSegmentList()]
+        expected_segments = [
+            [141901333, 69196857], [143340666, 69196857], [143340666, 69196857],
+            [143510000, 69142428], [143510000, 69142428], [143594666, 69088000],
+            [143594666, 69088000], [143679333, 68979142], [143679333, 68979142],
+            [143679333, 68761428], [143679333, 68761428], [143594666, 68652571],
+            [143594666, 68652571], [143510000, 68598142], [143510000, 68598142],
+            [143340666, 68543714], [143340666, 68543714], [141901333, 68543714],
+            [143679333, 67400714], [143679333, 68053857], [143679333, 67727285],
+            [141901333, 67727285], [141901333, 67727285], [142155333, 67836142],
+            [142155333, 67836142], [142324666, 67945000], [142324666, 67945000],
+            [142409333, 68053857]
+        ]
+        self.assertEqual(segments, expected_segments)
+
     def verify_text(self, text, x, y, layer, s):
         self.assertEquals(list(text.GetPosition()), [x, y])
         self.assertEquals(text.GetLayer(), layer)