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		Vi IMproved.  A clone of the UNIX text editor Vi.  Very useful
		for editing programs and other plain ASCII text.  Full Vi
		compatibility and includes all Ex commands.  Extra features
		above Vi: Multilevel undo, multiple windows, syntax
		highlighting, command line history, folding, improved command
		line editing, command typeahead display, command to display
		yank buffers, possibility to edit binary files, file name
		stack, support for Manx QuickFix and other compiler's error
		messages, shows current file name in window title, on-line
		help, rectangular cut/paste, etc., etc., etc...

		Version 9.0.  Also runs under UNIX, MS-Windows, Mac, etc.
		vim90rt.tgz  contains the documentation and syntax files.
		vim90bin.tgz contains the binaries.
		vim90src.tgz contains the sources.
		Author: Bram Moolenaar et al.


Xxd		Hex dumper and reader.  Can be used to view files as hex, edit
		them and write them back.  Can also be used to patch files.

		Version 2022 Jan 14
		Author: Juergen Weigert