[GRASS-dev] [SoC]Week-4 WebGrass

Vaclav Petras wenzeslaus at gmail.com
Tue Jun 21 18:18:05 PDT 2016

Hi Mayank,

On Tue, Jun 21, 2016 at 2:32 PM, Mayank Agrawal <mayankagrawal333 at gmail.com>

> for the v.buffer (v.buffer --interface-description), there is option for
> "input vector map" and "output vector map" (screenshot
> <https://cloud.githubusercontent.com/assets/12744703/16241571/e05a7402-380b-11e6-9701-9c211da3ebc3.png>).
> When you see the xml
> <https://gist.github.com/mayank33/5dccaa844787abee280c0291a1561ed2>, then
> you will notice "input vector map" is under label
> <https://gist.github.com/mayank33/5dccaa844787abee280c0291a1561ed2#file-buffer-xml-L12> tag
> and "output vector map" is under description
> <https://gist.github.com/mayank33/5dccaa844787abee280c0291a1561ed2#file-buffer-xml-L95> tag.
> Though both are shown at same place in dialog box. Same thing is done at
> many places in different modules. I want to know whether it is on purpose
> or some kind of error as this makes the parsing of xml for generation of
> dialog box, a little bit tricky. At some places, description tag is used
> and somewhere label tag is used. Also any help in this regard(parsing) will
> be highly appreciated.

The current definition of the option label and description is that
description is filled out and when it is very long, label is filled out as
well to provide a shorter text which can be shown in things like GUI. The
same applies also to flag and module. Both of them can be empty (which is
of course not good, but it is supported by --help).

It may be obvious that the definition is actually a legacy thing because
originally there was only description, so the modules usually define just
that. The label is a later addition which is not always present. This is of
course not ideal but that's the current backwards compatible state.

The right way to implement it for the (relatively short) labels in GUI is
to use label if available and use description if it is not. When the manual
page or --help are created, both are used if present, first label followed
by description.

Hope this helps,
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