scrolling with up arrow

Dependencies

• [2] MDXGMZU2 disable all debug prints
• [3] 537TQ2QN some more logging
• [4] JY4VK7L2 rename
• [5] CVGE3SIG I feel confident now that page-down is working.
• [6] ESETRNLB bugfix: printing the first part of a line at the bottom made it seem non-wrapping
• [7] QYIFOHW3 first test!
• [8] WLHI7KD3 new globals: draw partial screen line up top
• [9] S5VCAFKY couple of tests for cursor down
• [10] 2RXZ3PGO beginning of a new approach to scroll+wrap
• [11] H2DPLWMV snapshot: wrapping long lines at word boundaries
• [12] YTSPVDZH first successful pagedown test, first bug found by test
• [13] XOAHJ6M3 similar tests for cursor up
• [14] MGT5FTJ3 first stab at supporting wrapping in cursor up
• [15] JRGTJ2IW quite the frustrating bugfix
• [16] IMEJA43L snapshot
• [*] BULPIBEG beginnings of a module for the text editor

Change contents

• replacement in text.lua at line 32
  [3.2151]→[3.202:243](∅→∅),[3.243]→[2.185:255](∅→∅)
  − -- don't update y above screen top

  − if line_index > Screen_top1.line or pos >= Screen_top1.pos then
  [3.2151]

  [3.83]
  + -- update y only after drawing the first screen line of screen top

  + if line_index > Screen_top1.line or (line_index == Screen_top1.line and pos > Screen_top1.pos) then
• replacement in text.lua at line 35
  [3.119]→[3.1:108](∅→∅)
  − if New_foo then print('text: new screen line', y, App.screen.height, screen_line_starting_pos) end
  [3.119]

  [3.255]
  + --? print('text: new screen line', y, App.screen.height, screen_line_starting_pos)
• replacement in text.lua at line 46
  [3.306]→[2.256:326](∅→∅)
  − if line_index > Screen_top1.line or pos >= Screen_top1.pos then
  [3.306]

  [2.326]
  + if line_index > Screen_top1.line or (line_index == Screen_top1.line and pos > Screen_top1.pos) then
• replacement in text.lua at line 56
  [3.427]→[3.152:220](∅→∅),[3.152]→[3.152:220](∅→∅)
  − if line_index > Screen_top1.line or pos >= Screen_top1.pos then
  [3.427]

  [3.223]
  + if line_index > Screen_top1.line or (line_index == Screen_top1.line and pos >= Screen_top1.pos) then
• edit in text.lua at line 259
  [3.2740]→[3.2740:2750](∅→∅)
  − -- HERE
• replacement in text.lua at line 359
  [3.5311]→[3.5311:5455](∅→∅)
  − -- display the lines 2/3/4 with the cursor on line 2

  − App.screen.init{width=120, height=60}

  − Lines = load_array{'abc', 'def', 'ghi', 'jkl'}
  [3.5311]

  [3.5455]
  + -- display lines starting from the second screen line of line 3

  + App.screen.init{width=25+30, height=60}

  + Lines = load_array{'abc', 'def', 'ghi jkl', 'mno'}
• replacement in text.lua at line 363
  [3.5487]→[3.5487:5547](∅→∅)
  − Cursor1 = {line=2, pos=1}

  − Screen_top1 = {line=2, pos=1}
  [3.5487]

  [3.5547]
  + Cursor1 = {line=3, pos=6}

  + Screen_top1 = {line=3, pos=5}
• replacement in text.lua at line 371
  [3.5718]→[3.5718:5936](∅→∅)
  − App.screen.check(y, 'def', 'F - test_up_arrow_scrolls_up_by_one_screen_line/baseline/screen:1')

  − y = y + line_height

  − App.screen.check(y, 'ghi', 'F - test_up_arrow_scrolls_up_by_one_screen_line/baseline/screen:2')
  [3.5718]

  [3.5936]
  + App.screen.check(y, 'jkl', 'F - test_up_arrow_scrolls_up_by_one_screen_line/baseline/screen:1')
• replacement in text.lua at line 373
  [3.5958]→[3.5958:6056](∅→∅)
  − App.screen.check(y, 'jkl', 'F - test_up_arrow_scrolls_up_by_one_screen_line/baseline/screen:3')
  [3.5958]

  [3.6056]
  + App.screen.check(y, 'mno', 'F - test_up_arrow_scrolls_up_by_one_screen_line/baseline/screen:2')
• replacement in text.lua at line 377
  [3.6177]→[3.6177:6266](∅→∅)
  − App.screen.check(y, 'abc', 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen:1')
  [3.6177]

  [3.6266]
  + App.screen.check(y, 'ghi ', 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen:1')
• replacement in text.lua at line 379
  [3.6288]→[3.6288:6377](∅→∅)
  − App.screen.check(y, 'def', 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen:2')
  [3.6288]

  [3.6377]
  + App.screen.check(y, 'jkl', 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen:2')
• replacement in text.lua at line 381
  [3.6399]→[3.6399:6668](∅→∅)
  − App.screen.check(y, 'ghi', 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen:3')

  − check_eq(Screen_top1.line, 1, 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen_top')

  − check_eq(Cursor1.line, 1, 'F - test_up_arrow_scrolls_up_by_one_screen_line/cursor')
  [3.6399]

  [3.2148]
  + App.screen.check(y, 'mno', 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen:3')

  + check_eq(Screen_top1.line, 3, 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen_top')

  + check_eq(Screen_top1.pos, 1, 'F - test_up_arrow_scrolls_up_by_one_screen_line/screen_top')

  + check_eq(Cursor1.line, 3, 'F - test_up_arrow_scrolls_up_by_one_screen_line/cursor')

  + check_eq(Cursor1.pos, 1, 'F - test_up_arrow_scrolls_up_by_one_screen_line/cursor')