Refactored and improved Qt console's HTML export facility

[epatters]

In an effort to reduce the size of ConsoleWidget, which has grown to behemoth proportions, I have moved most of the HTML exportation code into a separate file. Specifically, I have:

• Made HTML exportation work again (I broke it while adding PySide support)
• Fixed missing spacing in the HTML output. The exported HTML now looks almost identical to what is in the actual widget.
• Removed the unnecessary check for the rich widget. QPlainTextEdit in fact supports HTML extraction, although this is not well advertised in the documentation.
• Done some other minor cleanup

[fperez]

When saving to HTML with inline png images from the Pyside version, I get:

Traceback (most recent call last):
  File "/home/fperez/ipython/ipython/IPython/frontend/qt/rich_text.py", line 115, in export
    title = self.window().windowTitle()
AttributeError: 'HtmlExporter' object has no attribute 'window'

Do you know what this is?

[epatters]

I fixed the immediate problem, which I hadn't encountered because my exports weren't failing.

It seems to be working on both PySide and PyQt4; I had to manually raise an exception for this code path to be exercised. This means that there is potentially some other problem behind your error. In any case, now you should be able to see what it is.

[fperez]

Hi Evan,

now I get this message:

Error exporting HTML to /home/fperez/tmp/junk/ipython2.html
'PySide.QtGui.QImage' object has no attribute 'toPyObject'

but in a popup dialog box whose title is "Error". The saved file is created but with 0 size.

The session only had this in two cells:

#1
plot(rand(100))

#2
for i in range(10):
    print i,

and I requested inline png images. The session had been started with '--pylab inline'. I'm running pyside from trunk, with the most recent commit I have being:

commit c3d180fdc269183cb4f46ee773bb8521f283bff0
Author: Renato Araujo Oliveira Filho 
Date:   Thu Feb 10 14:01:59 2011 -0300

    Created unit test for bug #671.

I'm leaving now for the SIAM conference, so I will likely not be able to do much testing until next weekend, unfortunately, but I'll try.

[epatters]

I'm not sure how I missed this, but thanks for your thoroughness Fernando. It should work now.

[fperez]

This import isn't necessary anymore: we depend on python >= 2.6, so the with statement is always available to us.

[fperez]

Very minor fixes (see my comments inline). Once you address those easy ones, merge away. And thanks for the good work!

Sorry for the delayed review, last week's travels did a number on my schedule.

[ivanistheone]

Hello,

Is there a way to use the export as HTML + base64 png facilities from a script?

I would like to run the script from the command line, to make it generate
an HTML "report" in the current directory, which I could then view with a browser.

ex script.py:

import ???
print "this is the graph"
p.plot([1,2,3], [22,11,33])

ex usage:

python ./myscript.py

then I see a report.html in that folder...

(I guess what I want is a %run that outputs to HTML)
(if it echos the inputs that would be even cooler ;)

Ivan