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如何使 dbus 命令持久。GNOME

tag-icon • tag-icon gnome dbus gnome-dash
如何使 dbus 命令持久。GNOME

在学习/了解 GNOME 时，我在网上遇到了以下两个命令。

dbus-send --session --type=method_call --dest=org.gnome.Shell /org/gnome/Shell org.gnome.Shell.Eval string:'Main.panel.actor.hide();'

dbus-send --session --type=method_call --dest=org.gnome.Shell /org/gnome/Shell org.gnome.Shell.Eval string:'Main.overview._dash.actor.hide();'

第一个命令隐藏顶部面板，
第二个命令隐藏仪表板。

但在会话期间，我使用 Alt+F2 r 重新启动 shell。在重新启动 shell 期间，两个命令都恢复到原始状态。

图像显示没有顶部面板 在此处输入图片描述

图像显示没有 Dash 在此处输入图片描述

有没有办法让这两个命令即使在 gnome-shell 重启后仍然有效？

注意：如果专家可以为这两种行为编写 gnome-shell-extensions，将不胜感激。

运行 Ubuntu 18.04、19.04 和 19.10

答案1

我将把这个作为临时答案发布出来，以便您入门。我唯一的 dbus 脚本会监控 gnome 或 unity 何时重置xrandr屏幕亮度，然后用自定义亮度和伽玛覆盖它。当 dash 或 panel 重置时，您需要类似的东西：

#!/bin/bash

# NAME: eyesome-dbus.sh
# PATH: /usr/local/bin
# DESC: Watch dbus for monitor color events
# CALL: Automatically started as deamon by eyesome.sh
# DATE: October 8, 2018. Modified October 22, 2018.

source eyesome-src.sh # Common code for eyesome___.sh bash scripts

Type="method_call"
Interface="org.freedesktop.ColorManager"
DirPath="/org/freedesktop/ColorManager"
Member="FindDeviceByProperty"
Watch="type=${Type}, interface=${Interface}, path=${DirPath}, member=${Member}"

# When NewTimeSTamp - OldTimeStamp > 5 seconds a new group of events occurs
# Wake up eyesome.sh to spam monitors
OldTimeStamp=$(printf '%(%s)T')

# Wait for user to sign on then get Xserver access for xrandr calls
UserName=""
iEventCnt=0

OneTimeWakeup () {

    # Wakeup eyesome.sh once for every group of commands
    # If the elapsed time between groups is > 5 seconds we assume a new group
    # of events has begun. Unplugging a monitor can create 5 DBUS events in
    # less than a second and we don't want to wakeup eyesome.sh 5 times.

    NewTimeStamp=$(printf '%(%s)T')
    secElapsed=$(( NewTimeStamp - OldTimeStamp ))
    # log "OneTimeWakeup Elapsed: $secElapsed New Stamp: $NewTimeStamp"
    OldTimeStamp="$NewTimeStamp"
    (( iEventCnt++ ))

    [[ "$secElapsed" -lt 6 ]] && return # If less than 5 seconds get more events

    log "Event Count: $iEventCnt over: $secElapsed seconds"
    iEventCnt=0

    # Has user signed on?
    if [[ "$UserName" == "" ]] ; then
        # Check if user has signed in
        UserName="$(who -u | grep -F '(:0)' | head -n 1 | awk '{print $1}')"

        if  [[ "$UserName" == "" ]] ; then
            LastLoginWait="$NewTimeStamp"
            log "Waiting for user to log in, not waking up eyesome"
            return
        else
            # There may not be events after user first logs in with external
            # monitor(s) disconnected. If monitor connected after logging in
            # then we want to wakeup eyesome daemon below.
            LastModificationSeconds=$(date +%s -r "$EyesomeUser")
            sec=$(( NewTimeStamp - LastModificationSeconds ))
            if [[ "$sec" -lt 15 ]] ; then
                log "$UserName logged in $sec seconds, not waking eyesome"
                return
            else
                log "$UserName logged in for $sec seconds, waking eyesome"
            fi
        fi
    fi

    # Wakeup eyesome.sh after dbus searched Xrandr monitor properties
    echo YES > "$EyesomeDbus"
    sync -d "$EyesomeDbus"      # Flush buffer immediately
    $WakeEyesome post eyesome-dbus.sh spam &

} # OneTimeWakeup

log "Starting DBUS-Monitor using $Watch"

dbus-monitor --system "${Watch}" | \
(
    while read line; do
       OneTimeWakeup
    done
)

log "Ending DBUS-Monitor" # This should never happen

exit 0

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