first stab at equally hacky cursor down support

[?]

May 21, 2022, 3:33 AM

PR4KIAZDOBQMEUOV2G7ZEZUW3E4L5ZCHYSS7PTYWGXPSNVRAGHCAC

Dependencies

[2] 537TQ2QN some more logging
[3] HBZ2UCUF stop recomputing Cursor_x now that we're saving it
[4] XNFTJHC4 split keyboard handling between Text and Drawing
[5] SVJZZDC3 snapshot - no, that's all wrong
[6] DLQMM265 scroll past first page
[7] 5ED3YGHW planning out cursor up/down over wrapped lines
[8] 76AIXR7H bugfix
[*] BULPIBEG beginnings of a module for the text editor
[*] WLHI7KD3 new globals: draw partial screen line up top
[*] HYEAFRZ2 split mouse_pressed events between Text and Drawing
[*] 242L3OQX bugfix: ensure Cursor_line is always on a text line

Change contents

edit in text.lua at line 28

[2.110]

[11.119]

end
if y > Screen_height then
if line.screen_line_starting_pos then
Bottom_screen_line_starting_pos = line.screen_line_starting_pos[#line.screen_line_starting_pos]
else
Bottom_screen_line_starting_pos = 1
end
replacement in text.lua at line 283

[4.4509]→[4.28:50](∅→∅),[4.50]→[4.4509:4681](∅→∅),[4.4509]→[4.4509:4681](∅→∅),[4.4758]→[4.4758:4796](∅→∅),[4.4796]→[3.178:258](∅→∅),[4.156]→[4.4885:4899](∅→∅),[3.258]→[4.4885:4899](∅→∅),[4.4885]→[4.4885:4899](∅→∅)

-- next text line
local new_cursor_line = Cursor_line
while new_cursor_line < #Lines do
new_cursor_line = new_cursor_line+1
if Lines[new_cursor_line].mode == 'text' then
Cursor_line = new_cursor_line
Cursor_pos = Text.nearest_cursor_pos(Lines[Cursor_line].data, Cursor_x)
break

[4.4509]

[4.4899]

if Text.cursor_at_final_screen_line() then
-- line is done, skip to next text line
print('down: cursor at final screen line of its line')
local new_cursor_line = Cursor_line
while new_cursor_line < #Lines do
new_cursor_line = new_cursor_line+1
if Lines[new_cursor_line].mode == 'text' then
Cursor_line = new_cursor_line
Cursor_pos = Text.nearest_cursor_pos(Lines[Cursor_line].data, Cursor_x)
print(Cursor_pos)
break
end
end
if Cursor_line > Screen_bottom_line then
Screen_top_line = Cursor_line
Text.scroll_up_while_cursor_on_screen()
replacement in text.lua at line 300

[4.4909]→[4.277:366](∅→∅)

end
if Cursor_line > Screen_bottom_line then
Screen_top_line = Cursor_line

[4.4909]

[4.1313]

else
-- move down one screen line in current line
print('cursor is NOT at final screen line of its line')
local screen_line_index, screen_line_starting_pos = Text.pos_at_start_of_cursor_screen_line()
new_screen_line_starting_pos = Lines[Cursor_line].screen_line_starting_pos[screen_line_index+1]
print('switching pos of screen line at cursor from '..tostring(screen_line_starting_pos)..' to '..tostring(new_screen_line_starting_pos))
local s = string.sub(Lines[Cursor_line].data, new_screen_line_starting_pos)
Cursor_pos = new_screen_line_starting_pos + Text.nearest_cursor_pos(s, Cursor_x) - 1
print('cursor pos is now '..tostring(Cursor_pos))
Text.scroll_up_while_cursor_on_screen()
edit in text.lua at line 327

[12.6]

[13.1]

function Text.cursor_at_final_screen_line()
if Lines[Cursor_line].screen_line_starting_pos == nil then
return true
end
i=#Lines[Cursor_line].screen_line_starting_pos
local spos = Lines[Cursor_line].screen_line_starting_pos[i]
return spos <= Cursor_pos
end