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List: kde-panel-devel
Subject: Re: Review Request 126513: Refactor kcm touchpad to fix some issue related to hotplug touchpad
From: "Rajeesh K V" <rajeeshknambiar () gmail ! com>
Date: 2015-12-31 18:10:02
Message-ID: 20151231181002.30660.20041 () mimi ! kde ! org
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> On Dec. 30, 2015, 4:34 p.m., Xuetian Weng wrote:
> > ping :)
I've been running this code with no issues, but no way to test the hotplug.
Wait for d_ed to confirm Ship it?
- Rajeesh
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/126513/#review90350
-----------------------------------------------------------
On Dec. 25, 2015, 7:02 p.m., Xuetian Weng wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/126513/
> -----------------------------------------------------------
>
> (Updated Dec. 25, 2015, 7:02 p.m.)
>
>
> Review request for Plasma and David Edmundson.
>
>
> Bugs: 349545 and 356923
> https://bugs.kde.org/show_bug.cgi?id=349545
> https://bugs.kde.org/show_bug.cgi?id=356923
>
>
> Repository: plasma-desktop
>
>
> Description
> -------
>
> Currently, there are some mixed issue in kcm touchpad related to libinput backend and hot \
> plug. There are several issues:
> 1. only one backend maybe used at runtime, either synaptics or libinput. But libinput backend \
> will only be used if there is a libinput backend present. Which means if libinput touchpad is \
> not present at login, kded will not be able to properly support them. 2. hotplug touchpad \
> will always set touchpad to disabled. 3. hotplug touchpad will not get configuration applied.
> 4. The libinput devices detection may pick some non-touchpad device.
>
> To solve these problems, following changes are made:
> 1. Remove SynapticsBackend and LibinputBackend and add three new classes called \
> XlibTouchpad/SynapticsTouchpad/LibinputTouchpad. So findTouchpad may pick up both synaptics \
> or libinput device, and no need to depend on a fixed backend. This change also make it easier \
> to support multiple touchpad device easier if needed.
> 2. hotplug touchpad config not being applied (bug 356923) is mainly because one can't apply \
> settings to a disabled device. Change the statement order in handleReset, apply settings \
> first then set enable status.
> 3. findTouchpad() is changed to use XListInputDevices, because it provides necessary \
> information of device type in order to filter out non-touchpad device. xf86-input-libinput \
> doesn't have a unique atom for touchpad, so current identityAtom cannot guarantee that \
> findTouchpad always returns a touchpad device for libinput.
> 4. On my surface pro 4 system, if touchpad is unpluged, the device will be set to disabled \
> automatically first, then touchpadDetached is called, which makes m_enabled in \
> TouchpadDisabled always to be false after unplug the touchapd. This patch makes \
> TouchpadDisabler have two different enabled property. m_userRequestedState only stores the \
> user requested status, so when handleReset is called, it can properly set enabled state to \
> the last user requested state.
>
> Diffs
> -----
>
> kcms/touchpad/src/applet/qml/contents/ui/touchpad.qml 8dec7c2
> kcms/touchpad/src/applet/touchpadengine.h 16b98c2
> kcms/touchpad/src/applet/touchpadengine.cpp eae429e
> kcms/touchpad/src/backends/x11.cmake c9fcea8
> kcms/touchpad/src/backends/x11/libinputproperties.c 9dbf9ea
> kcms/touchpad/src/backends/x11/libinputtouchpad.h PRE-CREATION
> kcms/touchpad/src/backends/x11/libinputtouchpad.cpp PRE-CREATION
> kcms/touchpad/src/backends/x11/propertyinfo.h PRE-CREATION
> kcms/touchpad/src/backends/x11/propertyinfo.cpp PRE-CREATION
> kcms/touchpad/src/backends/x11/synapticstouchpad.h PRE-CREATION
> kcms/touchpad/src/backends/x11/synapticstouchpad.cpp PRE-CREATION
> kcms/touchpad/src/backends/x11/synclientproperties.h 43d18d2
> kcms/touchpad/src/backends/x11/synclientproperties.c 5fd1ed6
> kcms/touchpad/src/backends/x11/xlibbackend.h 7cecb4a
> kcms/touchpad/src/backends/x11/xlibbackend.cpp b55a45f
> kcms/touchpad/src/backends/x11/xlibtouchpad.h PRE-CREATION
> kcms/touchpad/src/backends/x11/xlibtouchpad.cpp PRE-CREATION
> kcms/touchpad/src/kded/kded.h 9b8fe6e
> kcms/touchpad/src/kded/kded.cpp 409126b
> kcms/touchpad/src/touchpadbackend.h b225ed9
>
> Diff: https://git.reviewboard.kde.org/r/126513/diff/
>
>
> Testing
> -------
>
> Without touchpad -> login -> plug touchpad -> settings applied to device using libinput \
> driver. unplug -> replug -> settings applied to device using libinput driver.
>
>
> Disable touchpad -> applet shows up -> unplug touchpad -> applet hides -> replug touchpad -> \
> touchpad is still disabled, and applet shows up -> enable touhcpad -> applet hides.
>
> Thanks,
>
> Xuetian Weng
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/126513/">https://git.reviewboard.kde.org/r/126513/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On December 30th, 2015, 4:34 p.m. UTC, <b>Xuetian Weng</b> \
wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; \
white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: \
inherit;margin: 0;line-height: inherit;white-space: inherit;">ping :)</p></pre> </blockquote>
</blockquote>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; \
white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: \
inherit;margin: 0;line-height: inherit;white-space: inherit;">I've been running this code with \
no issues, but no way to test the hotplug. Wait for d_ed to confirm Ship it?</p></pre>
<br />
<p>- Rajeesh</p>
<br />
<p>On December 25th, 2015, 7:02 p.m. UTC, Xuetian Weng wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="12" style="border: 1px \
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<td>
<div>Review request for Plasma and David Edmundson.</div>
<div>By Xuetian Weng.</div>
<p style="color: grey;"><i>Updated Dec. 25, 2015, 7:02 p.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=349545">349545</a>,
<a href="https://bugs.kde.org/show_bug.cgi?id=356923">356923</a>
</div>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
plasma-desktop
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px \
solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Currently, \
there are some mixed issue in kcm touchpad related to libinput backend and hot plug. There are \
several issues: 1. only one backend maybe used at runtime, either synaptics or libinput. But \
libinput backend will only be used if there is a libinput backend present. Which means if \
libinput touchpad is not present at login, kded will not be able to properly support them. 2. \
hotplug touchpad will always set touchpad to disabled. 3. hotplug touchpad will not get \
configuration applied. 4. The libinput devices detection may pick some non-touchpad device. \
</p> <p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">To solve these problems, following changes are made: 1. Remove SynapticsBackend and \
LibinputBackend and add three new classes called \
XlibTouchpad/SynapticsTouchpad/LibinputTouchpad. So findTouchpad may pick up both synaptics or \
libinput device, and no need to depend on a fixed backend. This change also make it easier to \
support multiple touchpad device easier if needed.</p> <ol style="padding: 0;text-rendering: \
inherit;margin: 0 0 0 2em;line-height: inherit;white-space: normal;"> <li style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;"> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">hotplug touchpad config not being applied (bug 356923) is mainly because one can't \
apply settings to a disabled device. Change the statement order in handleReset, apply settings \
first then set enable status.</p> </li>
<li style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
normal;"> <p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">findTouchpad() is changed to use XListInputDevices, because it \
provides necessary information of device type in order to filter out non-touchpad device. \
xf86-input-libinput doesn't have a unique atom for touchpad, so current identityAtom cannot \
guarantee that findTouchpad always returns a touchpad device for libinput.</p> </li>
<li style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
normal;"> <p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">On my surface pro 4 system, if touchpad is unpluged, the device \
will be set to disabled automatically first, then touchpadDetached is called, which makes \
m_enabled in TouchpadDisabled always to be false after unplug the touchapd. This patch makes \
TouchpadDisabler have two different enabled property. m_userRequestedState only stores the user \
requested status, so when handleReset is called, it can properly set enabled state to the last \
user requested state.</p> </li>
</ol></pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid \
#b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: \
0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Without \
touchpad -> login -> plug touchpad -> settings applied to device using libinput \
driver. unplug -> replug -> settings applied to device using libinput driver.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: \
inherit;">Disable touchpad -> applet shows up -> unplug touchpad -> applet hides -> \
replug touchpad -> touchpad is still disabled, and applet shows up -> enable touhcpad \
-> applet hides.</p></pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>kcms/touchpad/src/applet/qml/contents/ui/touchpad.qml <span style="color: \
grey">(8dec7c2)</span></li>
<li>kcms/touchpad/src/applet/touchpadengine.h <span style="color: grey">(16b98c2)</span></li>
<li>kcms/touchpad/src/applet/touchpadengine.cpp <span style="color: \
grey">(eae429e)</span></li>
<li>kcms/touchpad/src/backends/x11.cmake <span style="color: grey">(c9fcea8)</span></li>
<li>kcms/touchpad/src/backends/x11/libinputproperties.c <span style="color: \
grey">(9dbf9ea)</span></li>
<li>kcms/touchpad/src/backends/x11/libinputtouchpad.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/libinputtouchpad.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/propertyinfo.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/propertyinfo.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/synapticstouchpad.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/synapticstouchpad.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/synclientproperties.h <span style="color: \
grey">(43d18d2)</span></li>
<li>kcms/touchpad/src/backends/x11/synclientproperties.c <span style="color: \
grey">(5fd1ed6)</span></li>
<li>kcms/touchpad/src/backends/x11/xlibbackend.h <span style="color: \
grey">(7cecb4a)</span></li>
<li>kcms/touchpad/src/backends/x11/xlibbackend.cpp <span style="color: \
grey">(b55a45f)</span></li>
<li>kcms/touchpad/src/backends/x11/xlibtouchpad.h <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/backends/x11/xlibtouchpad.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>kcms/touchpad/src/kded/kded.h <span style="color: grey">(9b8fe6e)</span></li>
<li>kcms/touchpad/src/kded/kded.cpp <span style="color: grey">(409126b)</span></li>
<li>kcms/touchpad/src/touchpadbackend.h <span style="color: grey">(b225ed9)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/126513/diff/" style="margin-left: 3em;">View \
Diff</a></p>
</td>
</tr>
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