Unescape when creating SVG files

[maacl]

Thanks for making dorothy. It is really easy to use. I am currently using it to generate SVG diagrams. In doing so I have trying to embed links in the diagrams. Graphviz of course supports links on nodes and edges, but I need to generate links on for instance a part of a label. To that end I have tried to embed raw svg strings in the label text, but dorothy (graphviz?) escape these. Is there a way to circumvent this behaviour or an alternative way of accomplishing what I am trying to do?

[daveray]

Howdy. I'd be happy to add this. Could you give an example of what you're trying to do and the dot output you'd expect to see?

[maacl]

Dave,

Thanks for looking into this. I have included an example blw.

(-> (digraph [ [:a :b] [:a :c] [:a {:label "A\nSubheading\nAn example link."}] ]) dot (save! "test.dot"
{:format :dot}))

Running this results in the attached test.dot file which looks ok, but when
I run:

(-> (digraph [ [:a :b] [:a :c] [:a {:label "A\nSubheading\nAn example link."}] ]) dot (save! "svg.dot"
{:format :svg}))

it results in the attached test.svg which has the html chars escaped.

I have handedited the attached svg-retrofit.svg to match my expected result.

I realise that this looks like a Graphviz issue, but am hoping you might
see a way around it. It would be much cleaner if I don't have to
post-process the svg to insert the links.

/mac

On Sun, Mar 10, 2013 at 4:45 AM, Dave Ray notifications@github.com wrote:

Howdy. I'd be happy to add this. Could you give an example of what you're
trying to do and the dot output you'd expect to see?

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/2#issuecomment-14675728
.

[daveray]

Hi. Sorry about the delayed reponse. ClojureWest happened :)

I've played around with this a bit and it doesn't seem that there's a way to defeat the escaping of the content in SVG text nodes, at least in part because of this change: http://www.graphviz.org/mantisbt/view.php?id=560

Interestingly, wrapping the label in html tags which should invoke Graphviz's html support causes the text to be completely omitted from the SVG output.

I guess it's understandable in that they might not know how to layout the text of a node when it contains arbitrary markup.

So, I'm not sure what can be done. You could devise some kind of post-processing step, but I'm not sure whether that would give you good results. :(

[maacl]

Dave,

Thanks for the response and thanks again for looking into this. I agree it
looks difficult.

As much as I hate it will try do some post-processing of the SVG
to achieve the desired effect.

/mac

On Fri, Mar 22, 2013 at 6:01 AM, Dave Ray notifications@github.com wrote:

Hi. Sorry about the delayed reponse. ClojureWest happened :)

I've played around with this a bit and it doesn't seem that there's a way
to defeat the escaping of the content in SVG text nodes, at least in part
because of this change: http://www.graphviz.org/mantisbt/view.php?id=560

Interestingly, wrapping the label in html tags which should invoke
Graphviz's html support causes the text to be completely omitted from the
SVG output.

I guess it's understandable in that they might not know how to layout the
text of a node when it contains arbitrary markup.

So, I'm not sure what can be done. You could devise some kind of
post-processing step, but I'm not sure whether that would give you good
results. :(

—
Reply to this email directly or view it on GitHubhttps://github.com//issues/2#issuecomment-15281361
.