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>

README_extra.txt for version 9.0 of Vim: Vi IMproved.

These extra files of Vim are for special purposes.  This README explains what
the files are for.  For general information about Vim, see the "README.txt"
file.


farsi/*			Files for the Farsi (persian) language.  If you don't
			know what Farsi is, this is not for you.

src/if_sniff.*		Interface to SNiFF.  If you don't know what SNiFF is,
			this is not for you.

src/os_amiga.*		Files for the Amiga port.

src/os_msdos.*
src/os_dos.*		Files for the MS-DOS port.

src/os_mac.*		Files for the Mac port.

src/os_vms*		Files for the VMS port.

src/os_w32*
src/os_win32.*		Files for the Win32 port.

src/gui_w32.*		Files for the Win32 GUI.
src/gui_w48.*		Files for the Win32 and Win16 GUI.
src/Make_mvc.mak	MS Visual C++ makefile for the Win32 GUI.

src/if_ole.*		OLE automation interface, for MS Windows 95 and NT.

src/GvimExt/*		DLL for the "Edit with Vim" context menu entry

nsis/*			NSIS script to build the self-installing MS-Windows exe

runtime/doc/*.man	Preprocessed manual pages.

runtime/macros/file_select.vim	Vim script to browse directories (Unix only).