Extension bug at creating text elements

[Karlisson]

I have tested the following tutorial http://wiki.inkscape.org/wiki/index.php/PythonEffectTutorial on 0.46 in Ubuntu Hardy and noticed that when I create a new text element and try to edit and press ENTER to insert a newline, I can't. It just creates new tspan's with no text inside. The cursor doesn't even move. It happens only on dynamic created texts with Python extensions.

[Aaron C Spike (acspike)]

There are definitely some weird behaviors here. Everytime I hit enter it duplicates the text contents horizontally (ignoring new lines). Very weird.

The tutorial is technically correct. Because it isn't doing multiple lines placing text directly in the <text/> element is sufficient. I don't know how Inkscape should properly behave when making a new line in a raw <text/> element. Perhaps we should place the current line into a tspan and add another.

Thanks for the report.

[Karlisson (karlisson)]

Update:

As you said at #inkscape, adding "sodipodi:role = line" solves the problem. But when the extension runs, I get the warning:

hello_world.py:
TagNameWarning: Tag names must not contain ':', lxml 2.0 will enforce well-formed tag names as required by the XML specification.
  tspan.set("sodipodi:role", "line")

Plus, the extension dialog doesn't close. (Like all the others)

What should I do?

[jazzynico (jazzynico)]

Still present in rev. 21789.

[su_v (suv-lp)]

> I don't know how Inkscape should properly behave
> when making a new line in a raw <text/> element.

Proposing to link as duplicate to:
- Bug #167904 "Incorrect handling of <text> without <tspan>”
  <https://bugs.launchpad.net/inkscape/+bug/167904>

[su_v (suv-lp)]

Related later reports (same symptom: <tspan> representing a line without editing information (sodipodi:role="line")):
* Bug #366744 “Multi-line text object in plain SVG behaves strangely after re-opening”
* Bug #1514050 “Cannot type newline in text objects”

[su_v (suv-lp)]

For extension authors:
adding an attribute in a custom namespace can use 'addNS()' from inkex.py, e.g.:

        mytext = inkex.etree.Element(inkex.addNS('text','svg'))
        myline = inkex.etree.SubElement(mytext, inkex.addNS('tspan', 'svg'))
        myline.set(inkex.addNS('role', 'sodipodi'), "line")

[Patrick Storz (ede123)]

Closing in favour of migrated bug #167904.

Closed by: https://gitlab.com/ede123
Moved to: https://gitlab.com/inkscape/inbox/issues/248