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Subject: Re: [PATCH] wps-display (was Re: Custom WPS)
From: Justin Heiner (jheiner_at_yahoo.com)
Date: 2002-08-31


could you post it in a normal zip possibly? Cygwin is telling me that it's not
a valid gzip file :)

-Justin

--- Magnus Holmgren <lear_at_algonet.se> wrote:
> Justin Heiner wrote:
>
> > The Custom WPS still has work that needs to be done with it. My reasoning
> > behind having it enabled 100% now is that other people other than me will
> do
> > updating on it hopefully (brainstorming with Bagder and others for that
> idea).
>
> OK, I've just created a patch for wps-display.c, rewriting most of the
> formatting code. I've added the MAD-style custom formatting, a few more
> % commands and fixed the bug that wps.config wasn't always reloaded (I
> think; I noticed the bug, but I haven't verified that the change works
> as intended ;).
>
> While I didn't copy the MAD code (which is GPL:ed), it did serve as an
> important reference, and the implementation I've made uses pretty much
> the same algorithm. So I added a comment about that, but I'm not sure
> what is "proper" to do in a case like this.
>
> The %-commands remain mostly the same. Some have been added, and a few
> have been removed:
>
> %% - Display a '%'
> %< - Display a '<'
> %| - Display a '|'
> %> - Display a '>'
> %s - Indicate that the line should scroll. Can occur anywhere in
> a line (given that the text is displayed; see conditional
> below). Only the first line with a %s will actually scroll.
> %s is ignored if combined with %pb, %pc or %pr on the same
> line (the result wouldn't be good anyway).
> %?xx<|> - Conditional: if the tag specified by "xx" has a value, the
> text between the "<" and the "|" is displayed, else the text
> between the "|" and the ">" is displayed.
> The else part is optional, so the "|" does not have to be
> specified if no else part is desired. The conditionals nest,
> so the text in the if and else part can contain all %
> commands, including conditionals.
> %ia - ID3 artist.
> %id - ID3 disc/album.
> &in - ID3 track number.
> %it - ID3 track title.
> %fb - Bit rate (in kbps).
> %ff - Frequency (in Hz).
> %fm - File name (with extension).
> %fn - File name (without extension).
> %fp - File path.
> %fs - Fize size (in kB).
> %pb - Progress bar char (Player only).
> %pc - Current time in song.
> %pe - Number of entries in playlist.
> %pp - Position in playlist.
> %pr - Remaining time in song.
> %d1 - First directory from end of file path.
> %d2 - Second directory from end of file path.
> %d2 - Third directory from end of file path.
>
> %fc and %fd are gone. They can mostly be emulated using %?<>. The
> additional %-commands makes it possible to handle all WPS modes using
> the format string.
>
> Example for the the %dn commands: If the path is "/Rock/Kent/Isola/11 -
> 747.mp3", %d1 is "Isola", %d2 is "Kent"... You get the picture.
>
> A more complex example (and the wps.config I use now):
>
> %s%?in<%in - >%?it<%it|%fn> %?ia<[%ia%?id<, %id>]>
> %pb%pc/%pt
>
> That is, "tracknum - title [artist, album]", where most fields are only
> displayed if available. Could also be rendered as "filename" or
> "tracknum - title [artist]".
>
> I think I've changed the semantics of wps_display/wps_refresh
> slightly... wps_display now makes a full render of the display (so a
> call to wps_refresh is not needed afterwards). When refresh_all in
> wps_refresh is false, it only updates those lines that contains fields
> that can change over time, such as play time. If refresh_all is true,
> the entire display is rendered, including the scrolling line. wps.c
> might need updates because of that, but it seems to work fine as it
> is... :)
>
> Note that I've only tested this on a player so far; I've no idea how
> well it works on a recorder (at least it compiles). On recorders, it
> needs to be able to handle fonts of different height in a better way (by
> calculating the number that fits, depending on status bars, fonts,
> etc.).
>
> > We've currently got only 64 characters per line on the Custom WPS, so
> whatever
> > commands are implented should be kept short and sweet.
>
> I've removed that limitation. The format itself must (currently) fit
> within 300 bytes. Formatting of a single line is done to a 256-byte
> buffer (MAX_PATH actually), but that is of course only useful for the
> scrolling line.
>
> --
> Magnus Holmgren

> ATTACHMENT part 2 application/x-gzip name=wps-display.patch.gz

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