Flickerless Gtk3 OpenGL Transitions

While I got OpenGL transitions working under Gtk3 at the end of last year basically matching the Gtk2/Generic OpenGL quality the transition into and out of the OpenGL sequence wasn't very satisfying. And with access to HiDPI it was clearly even worse with an unscaled image momentarily appearing before the correct one.

So here's the before and after of the improvements that landed on upstream master today. Just screen-recordings with built in ctrl+shift+alt+t under gnome3 and positioned side by side and clipped roughly together in pitivi

Impress LibreOffice OpenGL Slide Transitions under Wayland via GTK3

Impress LibreOffice OpenGL Slide Transitions under Wayland via GTK3 (GtkGlArea).

So I've implemented enough to get this working on my machine now. I've demoed "static", "glitter" and "honeycomb" above from my -O0 debugging build. I'll work on merging this to master now, patches are in our gerrit instance. Porting from glew to epoxy is a necessary step, I know it builds on Windows and Mac, but that's utterly untested.

Deckard and LibreOffice

LibreOffice reuses the same ui format that gtk uses. This suggests that deckard could be used to preview translations of them.

Testing this out shows (as above) that it can be made to work. A few problems though:

1. We have various placeholder widgets which don't work in deckard because the widgets don't exist in gtk so dialogs that use them can't display as something falls over with e.g. "Invalid object type 'SvSimpleTableContainer'" I had hoped I'd get placeholders by default on failure.
2. Our .po translation entries for the dialogs strings all have autogenerated msgctxt fields which don't correspond to the blank default of the .ui so the msgctxt fields have to be removed, then msguniq to remove duplicates, and the result can the be run through msgfmt to create a .mo that works with deckard to show web-previews

Office Binary Document RC4 CryptoAPI Encryption

In LibreOffice we've long supported Microsoft Office's "Office Binary Document RC4 Encryption" for decrypting xls, doc and ppt. But somewhere along the line the Microsoft Office encryption scheme was replaced by a new one, "Office Binary Document RC4 CryptoAPI Encryption", which we didn't support. This is what the error dialog of...

"The encryption method used in this document is not supported. Only Microsoft Office 97/2000 compatible password encryption is supported."

...from LibreOffice is telling you when you open, for example, an encrypted xls saved by a contemporary Microsoft Excel version.

I got the newer scheme working this morning for xls, so from LibreOffice 5-3 onwards (I may backport to upstream 5-2 and Fedora 5-1) these variants can be successfully decrypted and viewed in LibreOffice.

crashtesting: now 92000 documents

crash testing, now 92000 documents continuously tested

Last August we had a collection of approximately 76000 documents. This July we have over 92000 documents. The corpus is mostly gathered from our bugzilla and other projects bugzillas via our get-bugzilla-attachments-by-mimetype script. For testing purposes we continuously import them all, and then export certain formats to multiple destination formats. For example odts are re-exported to odt, doc and docx and the results of what documents crashed (which includes asserts) are uploaded to the crashtest site

 

I like to imagine that these are typically the type of mean and bitter documents that try to eat innocent office software alive.

 

The get-bugzilla-attachments-by-mimetype script only downloads new attachments from its target bugzillas which are not already downloaded. The last run to refresh the corpus took over two days to complete. Refreshing isn't fast or cheap so it's fairly infrequent.

 

The regular crashtesting run to import and reexport the corpus is comparatively frequent, takes approximately 24 hours and typically gets run every two or three days on the latest 64bit Linux master in headless mode.

spellchecking calendar/calender

A short 2009 article about Microsoft's group with responsibility for spellchecking that mentions the calendar/calender masking problem. Sometimes you probably do want correctly spelled words to be flagged.

native gtk3 menubar in libreoffice

Following quickly on native gtk3 popup context menus is implementation of native gtk3 menubar and menus.

For comparison here's the (not utterly awful) emulated look prior to this. You can compare the spacing of elements in the menubar, menu separator rendering, distance of checkmarks to the following text, the display of the short cuts in different font attributes with different positioning, and menu entry line spacing.

This is mostly achieved by reusing the export of the toplevel menubar and menu structure via GMenuModel work by Antonio Fernandez and Bjoern Michaelsen and just stuffing a GtkMenuBar into a GtkGrid in the toplevel widget and moving the LibreOffice "guts" widget a level down with no LibreOffice menubar visible.