wkhtmltopdf

wkhtmltopdf is still is an option for Tiki, however future energy will go in improving the MPDF integration.

High

Investigate https://github.com/AAverin/JSUtils/tree/master/wkhtmltopdfTableSplitHack
Tiki Check should report if wkhtmltopdf and wkhtmltoimage are available (and which version)
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```
** [root ~]# which wkhtmltopdf
/usr/local/bin/wkhtmltopdf
```
- Perhaps the dreaded "Unable to generate PDF" (seen on dev.tiki.org) could be "Unable to generate PDF because wkhtmltopdf is not detected"
make sure there is no problem with wkhtmltopdf (From wiki page to tiki-print.php, add onclick="window.print()" to save a click)
Document when access via Tokens is necessary (only when page is not accessible to anonymous?). Perhaps add a pref dependency
- And avoid this: http://stackoverflow.com/questions/27515760/tikiwiki-print-to-pdf-via-wkhtmltopdf-renders-login-screen/27541701#27541701
Keep an eye on this issue: Bootstrap and wkhtmltopdf
"The original document is available at..." has a few issues
- It doesn't respect the current language
- It's pretty weird when you are printing out an official document (same problem at tiki-print.php?page=) Perhaps this should be optional? (and default off)
Images: some images are OK on tiki-print.php but don't show up in PDF because they are not visible to anonymous (Token Access is not passed to embedded images)

Investigate Tiki slideshow conversion to PDF for Tiki Slideshow used in BigBlueButton to replace dompdf because "Fatal error: Call to a member function get_current_line_box() on a non-object in vendor/dompdf/dompdf/include/absolute_positioner.cls.php on line 92 "
Use page-break-inside: avoid; for tables and ideally between header and 1st paragraph

Integrate phpwkhtmltopdf or Snappy to have more options when printing.
- Logo / header (could be more than one template)
- Mail Merge
- etc.