convert to hard edge by selected polygon and NGON to quads

can you please adding convert to hard edge by selected polygon? it will be fast if i can selected hard edges in specified area like my pic below.


second request, is this possible done through code?
i mean there is triangle and NGON after chamfer operation.
heres my solution to get all quads. Merge the the triangle and connect those vertices with select similar after that i delete the triangle to get all quads. To get the straight shape i use edge loop tidy standard at the end.

my video if you dont understand what im saying
https://sendvid.com/yupcd3of

i think i will really hard if you change the chamfer algorithm. Maybe by selected polygon or edge.
 

can you please adding convert to hard edge by selected polygon? it will be fast if i can selected hard edges in specified area like my pic below.
 

Do you mean select hard edges in/by selected polygons?

second request, is this possible done through code?
i mean there is triangle and NGON after chamfer operation.
heres my solution to get all quads. Merge the the triangle and connect those vertices with select similar after that i delete the triangle to get all quads. To get the straight shape i use edge loop tidy standard at the end.

my video if you dont understand what im saying
https://sendvid.com/yupcd3of

i think i will really hard if you change the chamfer algorithm. Maybe by selected polygon or edge. 

It is too hard to implement.

"Do you mean select hard edges in/by selected polygons?"
yes something like that. is this already in nvil? I cant find that.


the second request idea came from this guy at https://www.youtube.com/watch?v=GvkSdC-kJ8c
i tried to manipulate with your chamfer edge to get same result.

"It is too hard to implement."

Well ok then, if you say so. its Ok

http://www.digitalfossils.com/Download/NVil-May-14-16.rar
  * Polygon mode > Selection > Hard Edges On Selection.