bugfix

To reproduce:
  click to position cursor at end of a line
  hit enter
  press any key

before:
  newline got erased and key got added to previous line

now:
  newline is preserved

The new test checks a generalization of this.

main.lua

@@ -347,6 +347,7 @@ function App.mousepressed(x,y, mouse_button)
         Old_selection1 = Selection1
         Mousepress_shift = App.shift_down()
         Selection1 = {line=line_index, pos=Text.to_pos_on_line(line, x, y)}
+--?         print('selection')
       end
     elseif line.mode == 'drawing' then
       if Drawing.in_drawing(line, x, y) then
@@ -372,6 +373,7 @@ function App.mousereleased(x,y, button)
     for line_index,line in ipairs(Lines) do
       if line.mode == 'text' then
         if Text.in_line(line_index,line, x,y) then
+--?           print('reset selection')
           Cursor1 = {line=line_index, pos=Text.to_pos_on_line(line, x, y)}
 --?           print(Cursor1.line, Cursor1.pos)
           if Mousepress_shift then
@@ -405,6 +407,9 @@ function App.textinput(t)
     Text.textinput(t)
   end
   schedule_save()
+  if not App.shift_down() then
+    Selection1 = {}
+  end
 end
 
 function App.keychord_pressed(chord)
@@ -547,6 +552,9 @@ function App.keychord_pressed(chord)
     for _,line in ipairs(Lines) do line.y = nil end  -- just in case we scroll
     Text.keychord_pressed(chord)
   end
+  if not App.shift_down() then
+    Selection1 = {}
+  end
 end
 
 function App.keyreleased(key, scancode)

text.lua

@@ -164,7 +164,7 @@ end
 
 -- Don't handle any keys here that would trigger love.textinput above.
 function Text.keychord_pressed(chord)
---?   print('chord')
+--?   print('chord', chord, Selection1.line, Selection1.pos)
   --== shortcuts that mutate text
   if chord == 'return' then
     local before_line = Cursor1.line

text_tests.lua

@@ -186,6 +186,24 @@ function test_click_on_wrapping_line_containing_non_ascii()
   check_eq(Cursor1.pos, 15, 'F - test_click_on_wrapping_line_containing_non_ascii/cursor')  -- one more than the number of UTF-8 code-points
 end
 
+function test_edit_after_click_resets_selection()
+  io.write('\ntest_edit_after_click_resets_selection')
+  -- display a line of text
+  App.screen.init{width=80, height=80}
+  Lines = load_array{'abc'}
+  Line_width = 75
+  Cursor1 = {line=1, pos=1}
+  Screen_top1 = {line=1, pos=1}
+  Screen_bottom1 = {}
+  App.draw()
+  -- click past the end of it and hit enter
+  App.run_after_mouse_click(Margin_left+40,Margin_top+5, 1)
+  check(Selection1.line, 'F - test_edit_after_click_resets_selection/baseline')
+  App.run_after_keychord('return')
+  -- selection is reset since shift key is not pressed
+  check_nil(Selection1.line, 'F - test_edit_after_click_resets_selection')
+end
+
 function test_edit_wrapping_text()
   io.write('\ntest_edit_wrapping_text')
   App.screen.init{width=50, height=60}