From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 28 Feb 2012 18:22:54 GMT
Subject: Re: [PATCH v7 03/10] column: add columnar layout
Message-ID: <7vy5rmzukh.fsf@alter.siamese.dyndns.org>
In-Reply-To: <1330430331-19945-4-git-send-email-pclouds@gmail.com>

Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:

> COL_MODE_COLUMN and COL_MODE_ROW fill column by column (or row by row
> respectively), given the terminal width and how many space between
> columns.
>
> Strings are supposed to be in UTF-8. If strings contain ANSI escape
> strings, COL_ANSI must be specified for correct length calculation.

Hrm, is it too heavyweight to autodetect and relieve the caller from the
burden of passing COL_ANSI?

Perhaps if you update utf8_strwidth() so that it takes <ptr, len> input
not NUL terminated string, you can do item_length like this, no?

	cp = s;
	width = 0;
	while (1) {
		ep = strstr(cp, "\033[");
		if (!ep) {
			width += utf8_strwidth(cp);
                        break;
		}
                utf8_strwidth_counted(cp, ep - cp);
		... scan ep to skip the "\033[...;X"
		cp = ep;
	}