patch 9.0.1747: screenpos() may cause unnecessary redraw Commit: https://github.com/vim/vim/commit/6235a109c48ff2559eca3b16578c429ffb61eadc Author: zeertzjq <zeertzjq@outlook.com> Date: Sat Aug 19 14:12:42 2023 +0200 patch 9.0.1747: screenpos() may cause unnecessary redraw Problem: screenpos() may cause unnecessary redraw. Solution: Don't unnecessarily reset VALID_WROW flag. VALID_WROW flag is only used by two functions: validate_cursor() and cursor_valid(), and cursor_valid() is only used once in ex_sleep(). When adjust_plines_for_skipcol() was first added in patch 9.0.0640, it was called in two functions: comp_botline() and curs_rows(). - comp_botline() is called in two places: - onepage(), which resets VALID_WROW flag immediately afterwards. - validate_botline_win(), where resetting a VALID_ flag is strange. - curs_rows() is called in two places: - curs_columns(), which sets VALID_WROW flag afterwards. - validate_cline_row(), which is only used by GUI mouse focus. Therefore resetting VALID_WROW there doesn't seem to do anything useful. Also, a w_skipcol check (which resets VALID_WROW flag) was added to check_cursor_moved() in patch 9.0.0734, which seems to make more sense than resetting that flag in the middle of a computation. While at it make adjust_plines_for_skipcol() and textpos2screenpos() a bit less confusing: - Make adjust_plines_for_skipcol() return "off" instead of "n - off". - Use 0-based "row" in textpos2screenpos() until W_WINROW is added. closes: #12832 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: zeertzjq <zeertzjq@outlook.com>

" Vim indent file
" Language:    Hamster Script 
" Version:     2.0.6.1
" Last Change: 2021 Oct 11
" Maintainer:  David Fishburn <dfishburn dot vim at gmail dot com>
" Download: https://www.vim.org/scripts/script.php?script_id=1099
"
"    2.0.6.1 (Oct 2021)
"        Added b:undo_indent
"        Added cpo check
"

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif
let b:did_indent = 1

setlocal indentkeys+==~if,=~else,=~endif,=~endfor,=~endwhile
setlocal indentkeys+==~do,=~until,=~while,=~repeat,=~for,=~loop
setlocal indentkeys+==~sub,=~endsub

let b:undo_indent = "setl indentkeys<"

" Define the appropriate indent function but only once
setlocal indentexpr=HamGetFreeIndent()
if exists("*HamGetFreeIndent")
  finish
endif

let s:keepcpo = &cpo
set cpo&vim

function HamGetIndent(lnum)
  let ind = indent(a:lnum)
  let prevline=getline(a:lnum)

  " Add a shiftwidth to statements following if,  else, elseif,
  " case, select, default, do, until, while, for, start
  if prevline =~? '^\s*\<\(if\|else\%(if\)\?\|for\|repeat\|do\|while\|sub\)\>' 
    let ind = ind + shiftwidth()
  endif

  " Subtract a shiftwidth from else, elseif, end(if|while|for), until
  let line = getline(v:lnum)
  if line =~? '^\s*\(else\|elseif\|loop\|until\|end\%(if\|while\|for\|sub\)\)\>'
    let ind = ind - shiftwidth()
  endif

  return ind
endfunction

function HamGetFreeIndent()
  " Find the previous non-blank line
  let lnum = prevnonblank(v:lnum - 1)

  " Use zero indent at the top of the file
  if lnum == 0
    return 0
  endif

  let ind=HamGetIndent(lnum)
  return ind
endfunction

" Restore:
let &cpo = s:keepcpo
unlet s:keepcpo

" vim:sw=2 tw=80