Bug 387467

Summary:	bold attribute ignored?
Product:	[Frameworks and Libraries] frameworks-syntax-highlighting	Reporter:	RJVB <rjvbertin>
Component:	theme	Assignee:	KWrite Developers <kwrite-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	nate, simonandric5
Priority:	NOR
Version:	5.38.0
Target Milestone:	---
Platform:	Compiled Sources
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=378523
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description RJVB 2017-11-30 11:21:58 UTC

I've been noticing for a few releases now that KDevelop (and Kate) no longer render text elements in bold on Linux while they do on Mac. It's not related to my choice of fonts, nor does it affect any of the other font attributes I tried.

Could this be related to #378523? I tried removing the setStyleName() call from the plasma-integration plugin (so a missing stylename in a conf. file is no longer replaced by the default regular style explicitly) but that had no effect.
Doing that AND removing the stylename extension from kateschemarc DID have the intended effect.

My 2 cents: Qt has long had sufficient glitches in the way it handles font styles and esp. weights. Using a canonical stylename could help there, but it seems the implementation of that idea still leaves a bit to desired. See my remarks on https://bugreports.qt.io/browse/QTBUG-63792 .

Comment 1 Nate Graham 2017-11-30 20:48:22 UTC

Yep, it's the Qt issue you brought up. I appreciate your comments in the upstream Qt bug report. If you have some ideas for how to work around the issue in Bug 378523, please don't hesitate to submit a patch!

*** This bug has been marked as a duplicate of bug 378523 ***

Comment 2 RJVB 2017-11-30 22:10:38 UTC

Will do. I only have some general ideas right now, in addition to https://phabricator.kde.org/D9070 . I'll probably need a few more run-ins with the "new" feature to get a better idea. I haven't really been noticing it before, but that's partly because I never really changed my font settings since upgrading to Qt 5.8 ... and when I did I restored my config by restoring a backup kdeglobals file.

Comment 3 RJVB 2017-12-04 10:16:43 UTC

Sadly it's beginning to look like KDE should have preserved or implemented a KFont wrapper class in KCoreAddons ... the latest exchanges on the upstream Qt bug report suggest things will only get worse. At the very least some kind of wrapper of the font dialog seems to be required, as that's apparently one way style names are getting set outside of code control.

I still am not perfectly certain which Qt version introduced the regression, 5.8? Either way, such a wrapper or other frameworks-level workaround ought to be implemented before the minimum required Qt version becomes more recent than the version that introduced the regression. (Because of the fact frameworks are version-linked and Qt has been dropping support for less recent OS versions recently.)