Arch Linux

Description:

I installed qutebrowser v1.0.4 and found that I could not use gcin in it.
(qutebrowser is an lightweight browser based on PyQt5)


Additional info:

* package version(s):
* gcin 2.8.5-2

* config and/or log files etc.

```
$ qutebrowser --version
qutebrowser v1.0.4
Git commit:
Backend: QtWebEngine (Chromium 61.0.3163.140)

CPython: 3.6.4
Qt: 5.10.0
PyQt: 5.9.2

sip: 4.19.6
colorama: 0.3.7
pypeg2: 2.15
jinja2: 2.10
pygments: 2.2.0
yaml: 3.12
cssutils: no
attr: 17.3.0
PyQt5.QtWebEngineWidgets: yes
PyQt5.QtWebKitWidgets: yes
pdf.js: no
sqlite: 3.21.0
QtNetwork SSL: OpenSSL 1.1.0g 2 Nov 2017

Style: QFusionStyle
Platform: Linux-4.14.8-1-ARCH-x86_64-with-arch, 64bit
Linux distribution: Arch Linux (arch)
Frozen: False
Imported from /usr/lib/python3.6/site-packages/qutebrowser
Qt library executable path: /usr/lib/qt/libexec, data path: /usr/share/qt
```

Steps to reproduce:

+ install gcin-2.8.5-2
+ install qutebrowser v1.0.4 (using Qt 5.10)
+ open qutebrowser
+ use Ctrl+Space or Ctrl+Shift, gcin won't show up.


Solution:

Here's [a thread on gcin forum discussed in Chinese](https://hyperrate.com/thread.php?tid=33785) about gcin doesn't work in applications using Qt 5.9.1, someone also reported it doesn't work in Qt 5.9.3 either, and I'm using Qt 5.10.0.

Someone posted the patch for this bug and it works for me. Here's the patch of PKGBUILD for this bug:

```
diff --git a/PKGBUILD.old b/PKGBUILD
index ca08fcb..7048c13 100644
--- a/PKGBUILD.old
+++ b/PKGBUILD
@@ -39,6 +39,12 @@ prepare() {
-e '/^MODVERSION=/a INCS+=-I/usr/include/qt/QtGui/$(MODVERSION) -I/usr/include/qt/QtCore/$(MODVERSION)' \
-i qt5-im/Makefile

+ # Patch to make gcin work in qt >= 5.9.x
+ # ref: <https://hyperrate.com/thread.php?tid=33785>
+ sed \
+ -e 's/org.qt-project.Qt.QPlatformInputContextFactoryInterface/&.5.1/' \
+ -i qt5-im/gcin-qt5.h.in
+
#  FS#45732 
patch -p1 -i ../qt-5.5.patch
```

I attached this patch below, hope this patch can be added soon.