Bug 365130

Summary:	QIcon::themeIcon(icon)) always returns default icon
Product:	[Frameworks and Libraries] frameworks-kiconthemes	Reporter:	Olivier Churlaud <olivier>
Component:	general	Assignee:	Christoph Feck <cfeck>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kdelibs-bugs-null
Priority:	NOR
Version First Reported In:	5.23.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:	http://commits.kde.org/kiconthemes/0abf1b7a148cf6b27caea01a329631e0f1daa983	Version Fixed/Implemented In:
Sentry Crash Report:

Description Olivier Churlaud 2016-07-05 22:44:12 UTC

I'm not sure it goes here, please move it if needed.

I was using TexStudio and I realized almost all icons were replaced by a default breeze empty icon. I bisected the issue and found out that QIcon::hasThemeIcon(icon)) always returns true and that QIcon::themeIcon(icon))  returns an empty breeze icon if the icon doesn't exist. instead of a null object.

See https://sourceforge.net/p/texstudio/bugs/1837/

Reproducible: Always

Comment 1 Olivier Churlaud 2016-07-05 22:44:52 UTC

It might be a Qt issue, but I cannot test without plasma.

Comment 2 David Rosca 2016-07-12 07:55:12 UTC

Git commit 0abf1b7a148cf6b27caea01a329631e0f1daa983 by David Rosca.
Committed on 12/07/2016 at 07:54.
Pushed by drosca into branch 'master'.

KIconEngine: Fix QIcon::hasThemeIcon always returning true

QIcon::hasThemeIcon(name) checks if QIcon::name() == name,
so icon engine must return empty string when icon doesn't exist.
Also implement IsNullHook for Qt 5.7. Comes with autotest.

REVIEW: 128397

M  +1    -0    autotests/CMakeLists.txt
A  +75   -0    autotests/kiconengine_unittest.cpp     [License: LGPL (v2+)]
M  +15   -0    src/kiconengine.cpp
M  +2    -0    src/kiconengine.h

http://commits.kde.org/kiconthemes/0abf1b7a148cf6b27caea01a329631e0f1daa983