bugfix in previous commit

I almost pushed this to production. That would have been catastrophic;
the very first keystroke anyone typed into the editor would have failed.

And in the process, this fixes the next bug on my TODO list! Paste on
first line wasn't working. Now it is.

2 files changed, 13 insertions, 0 deletions

diff --git a/text.lua b/text.lua
index 7fa4d2e..88ee18d 100644
--- a/text.lua
+++ b/text.lua
@@ -152,6 +152,7 @@ function Text.insert_at_cursor(t)
   else
     byte_offset = 1
   end
+--?   print(Screen_top1.line, Screen_top1.pos, Cursor1.line, Cursor1.pos, Screen_bottom1.line, Screen_bottom1.pos)
   Lines[Cursor1.line].data = string.sub(Lines[Cursor1.line].data, 1, byte_offset-1)..t..string.sub(Lines[Cursor1.line].data, byte_offset)
   Lines[Cursor1.line].fragments = nil
   Lines[Cursor1.line].screen_line_starting_pos = nil
@@ -160,6 +161,7 @@ function Text.insert_at_cursor(t)
   if scroll_down then
     Text.populate_screen_line_starting_pos(Cursor1.line)
     Text.snap_cursor_to_bottom_of_screen()
+--?     print('=>', Screen_top1.line, Screen_top1.pos, Cursor1.line, Cursor1.pos, Screen_bottom1.line, Screen_bottom1.pos)
   end
 end
 
@@ -624,6 +626,7 @@ end
 
 function Text.snap_cursor_to_bottom_of_screen()
   local top2 = Text.to2(Cursor1)
+  top2.screen_pos = 1  -- start of screen line
 --?   print('cursor pos '..tostring(Cursor1.pos)..' is on the #'..tostring(top2.screen_line)..' screen line down')
   local y = App.screen.height - Line_height
   -- duplicate some logic from love.draw
diff --git a/text_tests.lua b/text_tests.lua
index c11ef6e..ae7e794 100644
--- a/text_tests.lua
+++ b/text_tests.lua
@@ -1,6 +1,16 @@
 -- major tests for text editing flows
 -- This still isn't quite as thorough as I'd like.
 
+function test_insert_first_character()
+  io.write('\ntest_insert_first_character')
+  App.screen.init{width=120, height=60}
+  Lines = load_array{}
+  App.draw()
+  App.run_after_textinput('a')
+  local y = Margin_top
+  App.screen.check(y, 'a', 'F - test_insert_first_character/screen:1')
+end
+
 function test_draw_text()
   io.write('\ntest_draw_text')
   App.screen.init{width=120, height=60}