-- toggles between C++ source files and corresponding header files

scite_Command('Switch Source/Header|switch_source_header|*.c|Shift+Ctrl+H')

local cpp_exts = {'cpp','cxx','c++','c'}

local hpp_exts = {'h','hpp'}



local function within(list,val)

  for i,v in list do

     if val == v then return true end

  end

  return false

end



local function does_exist(basename,extensions)

  for i,ext in extensions do

    local f = basename..'.'..ext

    if scite_FileExists(f) then return f end

  end

  return nil

end



function switch_source_header()

   local file = props['FilePath']

   local ext = props['FileExt']

   local basename = props['FileDir']..'/'..props['FileName']

   if within(cpp_exts,ext) then

      other = does_exist(basename,hpp_exts)

   elseif within(hpp_exts,ext) then

      other = does_exist(basename,cpp_exts)

   else

      print('not a C++ file',file); return

   end

   if not other then 

      print('source/header does not exist',file)

   else

      scite.Open(other)

   end

 end