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toot-toot: cursor_up now handles wrapping lines

This commit is contained in:
Kartik K. Agaram 2021-12-23 11:01:52 -08:00
parent c1bcd566e9
commit a2cb3da0c9
1 changed files with 12 additions and 6 deletions
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18
toot-toot.tlv
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@ -659,7 +659,7 @@
> -- compute oldcol, the screen column of old_idx
> local oldcol = 0
> local col = 0
> local previous_newline = 0
> local newline_before_current_line = 0
> curses.addstr('^')
> while true do
> curses.addstr('|'..i)
@ -669,7 +669,7 @@
> end
> if s[i] == '\n' then
> col = 0
> previous_newline = i
> newline_before_current_line = i
> else
> col = col+1
> if col == width then
@ -680,12 +680,12 @@
> end
> -- find previous newline
> i = i-col-1
>--? curses.addstr('w'..old_idx..'-'..previous_newline)
> if old_idx - previous_newline > width then
>--? curses.addstr('w'..old_idx..'-'..newline_before_current_line)
> if old_idx - newline_before_current_line > width then
> -- we're in a wrapped line
> return old_idx - width
> end
> -- scan back to previous line
> -- scan back to start of previous line
> if s[i] == '\n' then
> i = i-1
> end
@ -701,10 +701,16 @@
> end
> i = i-1
> end
> -- compute index at same column on next line
> -- i is at a newline
> curses.addstr('/'..i)
> i = i+1
> -- skip whole screen lines within previous line
> curses.addstr('x'..old_idx..'-'..i)
> while newline_before_current_line - i > width do
> i = i + width
> curses.addstr('p'..i)
> end
> -- compute index at same column on previous screen line
> col = 0
> while true do
> curses.addstr('>>'..i)