After much prodding and poking by end-users for the past few months,
I'm finally able to announce a GHC-7.6.1 compatible release of my
Haskell bindings to the Graphviz graph visualisation toolkit:
http://hackage.haskell.org/package/graphviz-2999.15.0.0
(It took me so long to release a version that allowed
bytestring-0.10.* as I was waiting for upstream to get back to me
about an inconsistency I found; in the end I decided to just try and
cope with how it seems to work.)
The list of changes since the last release are:
* The repository is now hosted at
http://hub.darcs.net/ivanm/graphviz, and using the bug-tracker
there.
* Updates to various `Attribute` definitions:
- The list of available shapes has been expanded to take into
account the new synthetic biology shapes.
- The `Size` and `FontNames` attributes now have specified data types.
- The optional start and end points for `Spline`s were previously
the wrong way round; this has now been fixed.
- Explicitly only print 2-dimensional `Point` values for `Rect`
and `DPoint` (previously only 2-dimensional values where parsed,
but it was possible to print a 3-dimensional value).
- HTML-like labels previously disallowed empty textual label
components when parsing; spotted by Daniel Hummel.
* `GraphvizParams` now lets you specify whether a cluster is
actually a cluster or a sub-graph. Requested by Gabor Greif.
* Fixed an error where printing edges whose attributes contained a
`ColorScheme` attribute, that attribute would stay in the state and
the old color scheme would override the _parent's_ state.
* Previously, some malformed attributes were accepted when being
parsed as they silently became parsed as an `UnknownAttribute`.
Now, attributes where the attribute name and the equal sign are
successfully parsed **but** the value of the attribute is _not_
successfully parse will throw an unrecoverable error.
**Note**: this does mean that some Dot graphs that are accepted by
Graphviz (as they separate tokenizing from parsing; as such
something like `0.1` is successfully accepted as an integer,
specifically `0`) are no longer accepted when parsing them in.
* Miscellaneous parsing improvements:
- Whilst not specified anywhere, Graphviz seems to treat empty
quotes as values for attributes expecting a number as their
default; as such, this is now taken into account when parsing.
- `DPoint` values can now parse an optional `+` prefix.
- Whitespaces after commas in HSV colors are now accepted.
* Error messages from parsing are improved to help you track down
where the parsing error occurred (in that it's easier to find which
attribute failed to parse, etc.).
--
Ivan Lazar Miljenovic
ivan.miljeno...@gmail.com
http://IvanMiljenovic.wordpress.com
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