Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: alt.folklore.computers,comp.os.linux.misc
Subject: Re: The joy of Typography
Date: Fri, 18 Oct 2024 21:15:29 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 34
Message-ID: <veuj5h$3fkh5$3@dont-email.me>
References: <vd8doi$15q07$1@dont-email.me>
	<kMedne0I3JBuxmL7nZ2dnZfqnPgLyJ2d@earthlink.com>
	<slrnvgdhcc.2nfc6.candycanearter07@candydeb.host.invalid>
	<ve6pfp$2p1hd$8@dont-email.me> <ve8612$33lq0$3@dont-email.me>
	<ve9vga$3cbkr$4@dont-email.me> <mIdOO.204988$1m96.63811@fx15.iad>
	<vec4l3$3q4ms$5@dont-email.me> <criOO.380449$WOde.297877@fx09.iad>
	<20241014080601.00007478@gmail.com> <ln5gklF755tU4@mid.individual.net>
	<38fb5a91-5d00-be42-4bfe-2a05232a82c1@example.net>
	<ln7tooFijhpU2@mid.individual.net> <vemfq7$1qobu$5@dont-email.me>
	<venqec$24hhj$2@dont-email.me>
	<1420907830.750803935.503389.peter_flass-yahoo.com@news.eternal-september.org>
	<veqh7f$19v5v$1@paganini.bofh.team> <20241017090224.000072ce@gmail.com>
	<20241017203051.3143245f5330ac675cc1c166@127.0.0.1>
	<WUqdndxzb5qBRoz6nZ2dnZfqnPGdnZ2d@earthlink.com>
	<lne6rsFh72qU1@mid.individual.net> <vessel$35pc2$1@dont-email.me>
	<x-CcneTnt5bXYoz6nZ2dnZfqnPWdnZ2d@earthlink.com>
	<e0yQO.266441$v8v2.12196@fx18.iad>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Injection-Date: Fri, 18 Oct 2024 23:15:30 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="dfe289e3b0a8ce3b90c1b30ae00e2a59";
	logging-data="3658277"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX19g4ApADe5lTehFjmOzPkxn"
User-Agent: Pan/0.160 (Toresk; )
Cancel-Lock: sha1:ceS8r1n1B5zxOS3uXql3GsXj73o=
Bytes: 3465

On Fri, 18 Oct 2024 18:44:26 GMT, Charlie Gibbs wrote:

> I wrote some routines to generate my columnar reports in PDF.
> On the whole it worked fairly well, but I never found a way to
> right-justify a field.  Then it became a pain in the ass.

You mean “right-align”, not “right-justify”. Here’s a routine that
does alignment of text within a given line width, based on the current
point, using the current font settings. It can do left-align,
right-align, centre-align and anything in-between.

    def align_text(g, text_lines, line_width, align) :
        "renders the sequence of text_lines horizontally-aligned within line_width according" \
        " to align: 0 for left-aligned, 0.5 for centred, 1.0 for right-aligned; in-between" \
        " values also allowed. Returns the bounds of the rendered text."
        font_extents = g.font_extents
        bounds = Rect.empty
        for line in text_lines :
            save_pos = g.current_point
            extents = g.text_extents(line)
            if align != 0 :
                text_width = extents.width
                g.rel_move_to(((line_width - text_width) * align, 0))
            #end if
            bounds |= Rect(extents.x_bearing, extents.y_bearing, extents.width, extents.height) + g.current_point
            g.show_text(line)
            g.move_to(save_pos + Vector(0, font_extents.height))
        #end for
        return \
            bounds
    #end align_text

That comes from the “text_align_justify” example in this repo
<https://gitlab.com/ldo/qahirah_examples>.