akkartik
/
text.love
1
0
Fork 0
Code Issues Pull Requests Releases Activity

port an old fix to source editor

This commit is contained in:
Kartik K. Agaram 2023-09-16 22:40:46 -07:00
parent 6e2137c5b6
commit 9241fedf3a
1 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
source_edit.lua
View File

@ -111,7 +111,7 @@ function edit.check_locs(State)
-- if State is inconsistent (i.e. file changed by some other program),
-- throw away all cursor state entirely
if edit.invalid1(State, State.screen_top1)
or edit.invalid1(State, State.cursor1)
or edit.invalid_cursor1(State)
or not edit.cursor_on_text(State)
or not Text.le1(State.screen_top1, State.cursor1) then
State.screen_top1 = {line=1, pos=1}
@ -127,6 +127,16 @@ function edit.invalid1(State, loc1)
return loc1.pos > #State.lines[loc1.line].data
end
-- cursor loc in particular differs from other locs in one way:
-- pos might occur just after end of line
function edit.invalid_cursor1(State)
local cursor1 = State.cursor1
if cursor1.line > #State.lines then return true end
local l = State.lines[cursor1.line]
if l.mode ~= 'text' then return false end -- pos is irrelevant to validity for a drawing line
return cursor1.pos > #State.lines[cursor1.line].data + 1
end
function edit.cursor_on_text(State)
return State.cursor1.line <= #State.lines
and State.lines[State.cursor1.line].mode == 'text'