feat: give the classroom a desktop instead of a shell
The whole appliance UI is now configuration for a desktop Debian already ships: a Plasma 6.3 session with a colour scheme, a look and feel package that builds the bar, window rules, and KDE's own Kiosk restrictions. Two things were measured rather than assumed, and both changed a decision. Plasma restarts a crashed panel three times a minute and then gives up, which is the failure a classroom has already had. Four lines of systemd drop-in make it unconditional; the panel then survived eight SIGKILLs a second apart, back each time in 2.4s. Plasma draws a minimised task and a background task identically, so the five states the room needs cannot all be shown. Rather than write a task manager, the classroom removes minimise: clicking a launcher always means show me this. Co-Authored-By: Claude Opus 5 <[email protected]>
This commit is contained in:
ekklesia
co-authored by
Claude Opus 5
Claude Opus 5
parent
bfc7caf28f
commit
87b55761c6
@@ -2,25 +2,20 @@
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"DefaultBrowserSettingEnabled": false,
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"PromotionalTabsEnabled": false,
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"MetricsReportingEnabled": false,
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"BrowserSignin": 0,
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"SyncDisabled": true,
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"SigninInterceptionEnabled": false,
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"BrowserAddPersonEnabled": false,
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"BrowserGuestModeEnabled": false,
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"ProfilePickerOnStartupAvailability": 1,
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"PasswordManagerEnabled": false,
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"PasswordLeakDetectionEnabled": false,
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"BackgroundModeEnabled": false,
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"DisablePrintPreview": true,
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"CookiesSessionOnlyForUrls": [
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"[*.]wonderink.org"
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],
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"ShowHomeButton": true,
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"HomepageIsNewTabPage": false,
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"HomepageLocation": "https://app.wonderink.org/"
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"HomepageLocation": "https://www.youtube.com/"
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}
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@@ -1,6 +1,6 @@
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{
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"RestoreOnStartup": 4,
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"RestoreOnStartupURLs": [
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"https://app.wonderink.org/"
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"https://www.youtube.com/"
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]
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}
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@@ -0,0 +1,20 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- Parent Call.
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Deliberately not a colour tile. Parent Call is not one of the room's
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applications and does not sit in the row with them, so it is drawn in
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the interface's own accent as a line mark: present, reachable, and
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visibly a different kind of thing from Wonder Ink and the browser. -->
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<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128">
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<!-- Inset so the mark has the same optical size as the filled tiles
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beside it in the bar; an outline drawn to the edges reads larger. -->
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<g transform="translate(64 64) scale(0.62) translate(-64 -64)"
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fill="none" stroke="#4FB3A8" stroke-width="8"
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stroke-linecap="round" stroke-linejoin="round">
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<path d="M40 58a24 24 0 0 1 48 0c0 18 6 24 9 28H31c3-4 9-10 9-28z"/>
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<path d="M55 94a9 9 0 0 0 18 0"/>
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<path d="M64 26v-8"/>
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<path d="M100 30a30 30 0 0 1 8 20"/>
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<path d="M28 30a30 30 0 0 0-8 20"/>
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</g>
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</svg>
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After Width: | Height: | Size: 992 B |
@@ -0,0 +1,27 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!-- Wonder Ink.
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A stand-in for the product's own mark, which the classroom does not
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have a licensed asset for. It is a filled colour tile rather than a
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line drawing on purpose: the room already learned, the hard way, that
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a monochrome glyph on a bar is read as a decoration and not as an
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application. Somebody asked whether the old browser glyph meant "the
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Internet". A tile with its own colour does not get that question. -->
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<svg xmlns="http://www.w3.org/2000/svg" width="128" height="128" viewBox="0 0 128 128">
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<defs>
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<linearGradient id="tile" x1="0" y1="0" x2="1" y2="1">
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<stop offset="0" stop-color="#4FB3A8"/>
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<stop offset="0.55" stop-color="#3E93A8"/>
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<stop offset="1" stop-color="#7C6FC4"/>
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</linearGradient>
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</defs>
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<rect x="6" y="6" width="116" height="116" rx="28" fill="url(#tile)"/>
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<path d="M64 30c0 0 26 28 26 44a26 26 0 0 1-52 0c0-16 26-44 26-44z"
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fill="#FFFFFF" fill-opacity="0.94"/>
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<path d="M50 76a14 14 0 0 0 10 13" stroke="#3E93A8" stroke-width="5"
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stroke-linecap="round" fill="none" opacity="0.55"/>
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<g fill="#FFFFFF" opacity="0.9">
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<path d="M96 34l2.6 6.4L105 43l-6.4 2.6L96 52l-2.6-6.4L87 43l6.4-2.6z"/>
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<circle cx="34" cy="40" r="3.2"/>
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</g>
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</svg>
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After Width: | Height: | Size: 1.3 KiB |
@@ -0,0 +1,25 @@
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[Desktop Entry]
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# The room's browser, installed to /usr/local/share/applications, which
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# XDG_DATA_DIRS searches before /usr/share. Chrome's own entry is left
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# where Chrome's package put it and is simply never the one that is found.
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#
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# It has to carry Chrome's file name rather than a name of our own. Plasma
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# matches a window to its launcher by the application id the window
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# reports, and Chrome reports "google-chrome". A launcher under any other
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# name gives a teacher two buttons for one browser: a launcher that always
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# looks closed, and a window that appears beside it. That was measured, not
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# assumed — it is what the first build did.
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Type=Application
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Name=Browser
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GenericName=Web browser
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Comment=YouTube and the rest of the web
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Icon=google-chrome
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Exec=/usr/local/bin/classroom-browser %U
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Terminal=false
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Categories=Network;WebBrowser;
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StartupNotify=true
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StartupWMClass=google-chrome
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MimeType=text/html;x-scheme-handler/http;x-scheme-handler/https;
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# Chrome's own entry offers a new window and an incognito window from the
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# launcher's right-click menu. Neither belongs in a shared room.
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Actions=
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@@ -0,0 +1,13 @@
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[Desktop Entry]
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Type=Application
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Name=DVD
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Comment=Play the disc in the drive
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Exec=/usr/local/bin/classroom-dvd
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Icon=media-optical-dvd
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Terminal=false
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Categories=AudioVideo;Player;
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StartupNotify=true
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StartupWMClass=vlc
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# Never in a menu or a launcher by itself. The DVD appears when a disc is
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# in the drive, through Plasma's own device notifier, and goes away with it.
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NoDisplay=true
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@@ -0,0 +1,10 @@
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[Desktop Entry]
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Type=Application
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Name=Parent Call
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Comment=Ask for a child's parent to come to the room
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Exec=/usr/local/bin/classroom-parent-call
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Icon=ekklesia-parent-call
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Terminal=false
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Categories=Utility;
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StartupNotify=false
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NoDisplay=false
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@@ -0,0 +1,15 @@
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[Desktop Entry]
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Type=Application
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Name=Wonder Ink
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GenericName=Lesson
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Comment=The Wonder Ink lesson for this room
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Exec=/usr/local/bin/classroom-wonderink
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Icon=ekklesia-wonderink
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Terminal=false
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Categories=Education;
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StartupNotify=true
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# How the panel knows that the window on screen belongs to this launcher.
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# Chrome derives an app id from the --app URL, and this must match it
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# exactly or the launcher and the window become two separate buttons.
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StartupWMClass=chrome-app.wonderink.org__-Default
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X-GNOME-SingleWindow=true
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@@ -0,0 +1,155 @@
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# Ekklesia Classroom — dark. The default.
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#
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# One set of tokens for the whole session: Plasma reads this file for the
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# panel, the notifications, the window decorations and every Qt dialog, so
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# there is one place to change a colour rather than a stylesheet per surface.
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#
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# The hues come from the classroom wallpaper — sage, teal, blue, lavender —
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# so the desktop sits on the landscape rather than in front of it.
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[General]
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Name=Ekklesia Classroom Dark
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ColorScheme=EkklesiaDark
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shadeSortColumn=true
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accentActiveTitlebar=false
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[ColorEffects:Disabled]
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ChangeSelectionColor=
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Color=56,66,71
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ColorAmount=0
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ColorEffect=0
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ContrastAmount=0.5
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ContrastEffect=1
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Enable=
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IntensityAmount=0
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IntensityEffect=0
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[ColorEffects:Inactive]
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ChangeSelectionColor=true
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Color=112,111,110
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ColorAmount=0.025
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ColorEffect=2
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ContrastAmount=0.1
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ContrastEffect=2
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Enable=false
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IntensityAmount=0
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IntensityEffect=0
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[Colors:Button]
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BackgroundAlternate=30,42,47
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BackgroundNormal=25,35,40
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=147,165,170
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=230,237,239
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[Colors:Selection]
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BackgroundAlternate=79,179,168
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BackgroundNormal=79,179,168
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=14,21,24
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ForegroundInactive=14,21,24
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ForegroundLink=14,21,24
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ForegroundNegative=14,21,24
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ForegroundNeutral=14,21,24
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ForegroundNormal=10,16,18
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ForegroundPositive=14,21,24
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ForegroundVisited=14,21,24
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[Colors:Tooltip]
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BackgroundAlternate=25,35,40
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BackgroundNormal=20,28,32
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=147,165,170
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=230,237,239
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[Colors:View]
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BackgroundAlternate=20,28,32
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BackgroundNormal=15,23,26
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=147,165,170
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=230,237,239
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[Colors:Window]
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BackgroundAlternate=25,35,40
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BackgroundNormal=20,28,32
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=147,165,170
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=230,237,239
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[Colors:Complementary]
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BackgroundAlternate=25,35,40
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BackgroundNormal=20,28,32
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=147,165,170
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=230,237,239
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[Colors:Header]
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BackgroundAlternate=25,35,40
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BackgroundNormal=18,26,30
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=147,165,170
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=230,237,239
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[Colors:Header][Inactive]
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BackgroundAlternate=20,28,32
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BackgroundNormal=16,23,26
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DecorationFocus=79,179,168
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DecorationHover=79,179,168
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ForegroundActive=79,179,168
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ForegroundInactive=125,142,147
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ForegroundLink=126,196,255
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ForegroundNegative=227,106,106
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ForegroundNeutral=224,177,92
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ForegroundNormal=170,186,191
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ForegroundPositive=111,207,151
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ForegroundVisited=156,138,222
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[WM]
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activeBackground=18,26,30
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activeBlend=79,179,168
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activeForeground=230,237,239
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inactiveBackground=16,23,26
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inactiveBlend=147,165,170
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inactiveForeground=147,165,170
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@@ -0,0 +1,158 @@
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# Ekklesia Classroom — light.
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#
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# GENERATED from EkklesiaDark.colors by tools/build-light-scheme.
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# Edit the dark scheme and regenerate; do not edit this file by hand.
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#
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# One set of tokens for the whole session: Plasma reads this file for the
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# panel, the notifications, the window decorations and every Qt dialog, so
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# there is one place to change a colour rather than a stylesheet per surface.
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#
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# The hues come from the classroom wallpaper — sage, teal, blue, lavender —
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# so the desktop sits on the landscape rather than in front of it.
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[General]
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Name=Ekklesia Classroom Light
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ColorScheme=EkklesiaLight
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shadeSortColumn=true
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accentActiveTitlebar=false
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[ColorEffects:Disabled]
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ChangeSelectionColor=
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Color=56,66,71
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ColorAmount=0
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ColorEffect=0
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ContrastAmount=0.5
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ContrastEffect=1
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Enable=
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IntensityAmount=0
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IntensityEffect=0
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[ColorEffects:Inactive]
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ChangeSelectionColor=true
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Color=112,111,110
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ColorAmount=0.025
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ColorEffect=2
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ContrastAmount=0.1
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ContrastEffect=2
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Enable=false
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IntensityAmount=0
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IntensityEffect=0
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[Colors:Button]
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BackgroundAlternate=225,231,230
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BackgroundNormal=233,238,237
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=46,140,130
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ForegroundInactive=96,116,122
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ForegroundLink=26,110,180
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ForegroundNegative=192,57,57
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ForegroundNeutral=166,116,24
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ForegroundNormal=22,35,42
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ForegroundPositive=38,142,86
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ForegroundVisited=104,80,180
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[Colors:Selection]
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BackgroundAlternate=46,140,130
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BackgroundNormal=46,140,130
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=255,255,255
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ForegroundInactive=255,255,255
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ForegroundLink=255,255,255
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ForegroundNegative=255,255,255
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ForegroundNeutral=255,255,255
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ForegroundNormal=255,255,255
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ForegroundPositive=255,255,255
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ForegroundVisited=255,255,255
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[Colors:Tooltip]
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BackgroundAlternate=233,238,237
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BackgroundNormal=242,245,244
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=46,140,130
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ForegroundInactive=96,116,122
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ForegroundLink=26,110,180
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ForegroundNegative=192,57,57
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ForegroundNeutral=166,116,24
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ForegroundNormal=22,35,42
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ForegroundPositive=38,142,86
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ForegroundVisited=104,80,180
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[Colors:View]
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BackgroundAlternate=242,245,244
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BackgroundNormal=255,255,255
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=46,140,130
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ForegroundInactive=96,116,122
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ForegroundLink=26,110,180
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ForegroundNegative=192,57,57
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ForegroundNeutral=166,116,24
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ForegroundNormal=22,35,42
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ForegroundPositive=38,142,86
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ForegroundVisited=104,80,180
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[Colors:Window]
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BackgroundAlternate=233,238,237
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BackgroundNormal=242,245,244
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=46,140,130
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ForegroundInactive=96,116,122
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ForegroundLink=26,110,180
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ForegroundNegative=192,57,57
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ForegroundNeutral=166,116,24
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ForegroundNormal=22,35,42
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ForegroundPositive=38,142,86
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ForegroundVisited=104,80,180
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[Colors:Complementary]
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BackgroundAlternate=233,238,237
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BackgroundNormal=242,245,244
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=46,140,130
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ForegroundInactive=96,116,122
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ForegroundLink=26,110,180
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ForegroundNegative=192,57,57
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ForegroundNeutral=166,116,24
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ForegroundNormal=22,35,42
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ForegroundPositive=38,142,86
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ForegroundVisited=104,80,180
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[Colors:Header]
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BackgroundAlternate=233,238,237
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BackgroundNormal=236,241,240
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DecorationFocus=46,140,130
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DecorationHover=46,140,130
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ForegroundActive=46,140,130
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ForegroundInactive=96,116,122
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ForegroundLink=26,110,180
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ForegroundNegative=192,57,57
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ForegroundNeutral=166,116,24
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ForegroundNormal=22,35,42
|
||||
ForegroundPositive=38,142,86
|
||||
ForegroundVisited=104,80,180
|
||||
|
||||
[Colors:Header][Inactive]
|
||||
BackgroundAlternate=242,245,244
|
||||
BackgroundNormal=228,234,233
|
||||
DecorationFocus=46,140,130
|
||||
DecorationHover=46,140,130
|
||||
ForegroundActive=46,140,130
|
||||
ForegroundInactive=120,138,144
|
||||
ForegroundLink=26,110,180
|
||||
ForegroundNegative=192,57,57
|
||||
ForegroundNeutral=166,116,24
|
||||
ForegroundNormal=80,99,105
|
||||
ForegroundPositive=38,142,86
|
||||
ForegroundVisited=104,80,180
|
||||
|
||||
[WM]
|
||||
activeBackground=236,241,240
|
||||
activeBlend=46,140,130
|
||||
activeForeground=22,35,42
|
||||
inactiveBackground=228,234,233
|
||||
inactiveBlend=96,116,122
|
||||
inactiveForeground=96,116,122
|
||||
@@ -0,0 +1,31 @@
|
||||
# Everything the classroom's appearance is made of, in one place.
|
||||
#
|
||||
# Plasma reads this when the look and feel is applied, so the panel, the
|
||||
# window decorations, the notifications and every Qt dialog in the session
|
||||
# are described here rather than in a stylesheet per surface.
|
||||
|
||||
[kdeglobals][KDE]
|
||||
widgetStyle=Breeze
|
||||
|
||||
[kdeglobals][General]
|
||||
ColorScheme=EkklesiaDark
|
||||
AccentColor=79,179,168
|
||||
|
||||
[kdeglobals][Icons]
|
||||
Theme=breeze-dark
|
||||
|
||||
[plasmarc][Theme]
|
||||
name=default
|
||||
|
||||
[kcminputrc][Mouse]
|
||||
cursorTheme=breeze_cursors
|
||||
|
||||
[kwinrc][org.kde.kdecoration2]
|
||||
library=org.kde.breeze
|
||||
theme=Breeze
|
||||
|
||||
[Wallpaper]
|
||||
Image=/usr/share/backgrounds/ekklesia/classroom-calm.png
|
||||
|
||||
[KSplash]
|
||||
Theme=None
|
||||
@@ -0,0 +1,124 @@
|
||||
// The Ekklesia Classroom desktop.
|
||||
//
|
||||
// Plasma runs this once, when a session has no panel yet, and again on
|
||||
// demand — `plasma-apply-lookandfeel -a org.ekklesia.classroom.desktop
|
||||
// --resetLayout` rebuilds the whole desktop from this file. That is the
|
||||
// classroom's recovery path for a damaged shell, and it is Plasma's own
|
||||
// mechanism rather than something written here.
|
||||
//
|
||||
// One full-width bar along the bottom. Left is auxiliary, the middle is
|
||||
// applications, the right is the small amount of status a teacher needs.
|
||||
// Nothing else is on the screen.
|
||||
|
||||
var WALLPAPER = "/usr/share/backgrounds/ekklesia/classroom-calm.png";
|
||||
|
||||
// Matches the 76px strip the classroom has always used, so muscle memory
|
||||
// and the room's viewing distance both carry over.
|
||||
var PANEL_HEIGHT = 76;
|
||||
|
||||
// The idle desktop: the wallpaper, and nothing on it.
|
||||
var screens = desktops();
|
||||
for (var i = 0; i < screens.length; i++) {
|
||||
var desktop = screens[i];
|
||||
desktop.wallpaperPlugin = "org.kde.image";
|
||||
desktop.currentConfigGroup = ["Wallpaper", "org.kde.image", "General"];
|
||||
desktop.writeConfig("Image", "file://" + WALLPAPER);
|
||||
desktop.writeConfig("SlidePaths", "");
|
||||
// 2 is "scaled and cropped": the landscape fills the display at any
|
||||
// aspect ratio without being stretched out of shape.
|
||||
desktop.writeConfig("FillMode", 2);
|
||||
desktop.reloadConfig();
|
||||
}
|
||||
|
||||
var panel = new Panel();
|
||||
panel.location = "bottom";
|
||||
panel.height = PANEL_HEIGHT;
|
||||
panel.hiding = "none";
|
||||
panel.floating = false;
|
||||
panel.lengthMode = "fill";
|
||||
panel.alignment = "center";
|
||||
panel.opacity = "adaptive";
|
||||
|
||||
// LEFT — auxiliary. Parent Call is not one of the room's applications and
|
||||
// is deliberately not in the row with them.
|
||||
var parentCall = panel.addWidget("org.kde.plasma.icon");
|
||||
parentCall.currentConfigGroup = ["General"];
|
||||
parentCall.writeConfig(
|
||||
"url",
|
||||
"file:///usr/share/applications/ekklesia-parent-call.desktop"
|
||||
);
|
||||
|
||||
var leftGap = panel.addWidget("org.kde.plasma.panelspacer");
|
||||
leftGap.currentConfigGroup = ["General"];
|
||||
leftGap.writeConfig("expanding", true);
|
||||
|
||||
// CENTRE — the applications, and the whole of the running/minimised/active
|
||||
// story. This applet is the reason the classroom stops writing a dock.
|
||||
var tasks = panel.addWidget("org.kde.plasma.icontasks");
|
||||
tasks.currentConfigGroup = ["General"];
|
||||
tasks.writeConfig("launchers", [
|
||||
"applications:ekklesia-wonderink.desktop",
|
||||
"applications:google-chrome.desktop"
|
||||
].join(","));
|
||||
// Every window gets its own button. Teachers should never have to open a
|
||||
// group to find out that a second window exists.
|
||||
tasks.writeConfig("groupingStrategy", 0);
|
||||
tasks.writeConfig("showOnlyCurrentDesktop", false);
|
||||
tasks.writeConfig("showOnlyCurrentActivity", false);
|
||||
tasks.writeConfig("showOnlyCurrentScreen", false);
|
||||
// Clicking a button always means "show me this", and never "hide it".
|
||||
//
|
||||
// This was measured before it was decided. Plasma 6.3 draws a minimised
|
||||
// task and a task that is merely behind another window identically: no
|
||||
// indicator for closed, a grey indicator for running, a teal one for
|
||||
// active — three marks for four states. Rather than write a task manager
|
||||
// that draws a fourth, the classroom removes the state. There is nothing
|
||||
// on the idle desktop for a teacher to want to see, so minimising an
|
||||
// application in this room has no purpose and only ever loses it.
|
||||
//
|
||||
// A window minimised some other way is still shown as running and comes
|
||||
// back with one click, so it can never be lost even then.
|
||||
tasks.writeConfig("minimizeActiveTaskOnClick", false);
|
||||
tasks.writeConfig("fill", false);
|
||||
tasks.writeConfig("maxStripes", 1);
|
||||
tasks.writeConfig("indicateAudioStreams", false);
|
||||
tasks.writeConfig("wheelEnabled", false);
|
||||
tasks.writeConfig("middleClickAction", "NewInstance");
|
||||
tasks.writeConfig("showToolTips", true);
|
||||
tasks.writeConfig("iconSpacing", 2);
|
||||
|
||||
var rightGap = panel.addWidget("org.kde.plasma.panelspacer");
|
||||
rightGap.currentConfigGroup = ["General"];
|
||||
rightGap.writeConfig("expanding", true);
|
||||
|
||||
// RIGHT — status.
|
||||
//
|
||||
// Four ordinary applets straight on the bar, and no system tray around
|
||||
// them. A tray is a container that discovers whatever is installed and
|
||||
// then hides most of it behind an arrow; measured in the lab it collected
|
||||
// battery, brightness, clipboard, keyboard layout, camera, vaults and
|
||||
// screen management on a machine that has none of those to say anything
|
||||
// about. Naming the four the classroom actually uses is both smaller and
|
||||
// deterministic, and it leaves nothing for a teacher to expand.
|
||||
panel.addWidget("org.kde.plasma.networkmanagement");
|
||||
panel.addWidget("org.kde.plasma.volume");
|
||||
|
||||
// Present only while there is something in a drive. Plasma's own Solid
|
||||
// device notifier is what makes the DVD appear with the disc and leave
|
||||
// with it, so nothing in the classroom polls for media.
|
||||
panel.addWidget("org.kde.plasma.devicenotifier");
|
||||
|
||||
panel.addWidget("org.kde.plasma.notifications");
|
||||
|
||||
var clock = panel.addWidget("org.kde.plasma.digitalclock");
|
||||
clock.currentConfigGroup = ["Appearance"];
|
||||
clock.writeConfig("showDate", true);
|
||||
clock.writeConfig("dateFormat", "custom");
|
||||
clock.writeConfig("customDateFormat", "ddd d MMM");
|
||||
clock.writeConfig("showSeconds", 0);
|
||||
clock.writeConfig("dateDisplayFormat", "BelowTime");
|
||||
// Left to itself the clock grows to the height of the bar and becomes the
|
||||
// largest text in the room. It is status, not a headline.
|
||||
clock.writeConfig("autoFontAndSize", false);
|
||||
clock.writeConfig("fontSize", 15);
|
||||
clock.writeConfig("fontWeight", 500);
|
||||
@@ -0,0 +1,17 @@
|
||||
{
|
||||
"KPackageStructure": "Plasma/LookAndFeel",
|
||||
"KPlugin": {
|
||||
"Authors": [
|
||||
{
|
||||
"Name": "Ekklesia"
|
||||
}
|
||||
],
|
||||
"Category": "",
|
||||
"Description": "The classroom appliance desktop",
|
||||
"Id": "org.ekklesia.classroom.desktop",
|
||||
"License": "GPLv2+",
|
||||
"Name": "Ekklesia Classroom",
|
||||
"Website": "https://riverofglorymn.org"
|
||||
},
|
||||
"X-Plasma-APIVersion": "2"
|
||||
}
|
||||
@@ -0,0 +1,13 @@
|
||||
[Desktop Entry]
|
||||
Type=Service
|
||||
# Solid decides when this exists. Plasma's device notifier offers it while
|
||||
# a video DVD is in the drive and withdraws it when the disc is ejected, so
|
||||
# a room without a drive shows nothing and a room with one needs no setting
|
||||
# changed. Nothing polls.
|
||||
X-KDE-Solid-Predicate=[[ StorageVolume.ignored == false AND StorageVolume.usage == 'Other' ] AND [ OpticalDisc.availableContent & 'VideoDvd' ]]
|
||||
Actions=Play;
|
||||
|
||||
[Desktop Action Play]
|
||||
Name=Play the DVD
|
||||
Icon=media-optical-dvd
|
||||
Exec=/usr/local/bin/classroom-dvd %f
|
||||
@@ -0,0 +1,60 @@
|
||||
# Ekklesia Classroom session policy.
|
||||
#
|
||||
# Installed to /etc/xdg/kdeglobals, where it is the bottom of Plasma's
|
||||
# configuration cascade. Every group is marked [$i] — immutable — so a
|
||||
# teacher, a stray click or a misbehaving application cannot override it
|
||||
# from the user's own configuration. This is KDE's own Kiosk mechanism:
|
||||
# nothing here is achieved by deleting a binary or hiding a menu entry.
|
||||
#
|
||||
# Lifting a restriction for maintenance is a one-line edit to this file
|
||||
# followed by a session restart, which is what makes the appliance
|
||||
# serviceable rather than merely locked.
|
||||
|
||||
[KDE Action Restrictions][$i]
|
||||
# No way to reach a shell, a command line, or an arbitrary program.
|
||||
action/kdesktop_rmb=false
|
||||
action/kwin_rmb=false
|
||||
action/openwith=false
|
||||
action/switch_user=false
|
||||
action/start_new_session=false
|
||||
action/lock_screen=false
|
||||
run_command=false
|
||||
shell_access=false
|
||||
logout=false
|
||||
# The desktop and the panel are a fixed part of the appliance.
|
||||
editable_desktop_icons=false
|
||||
editable_bookmarks=false
|
||||
movable_toolbars=false
|
||||
plasma/plasmashell/unlockedDesktop=false
|
||||
plasma-desktop/scripting_console=false
|
||||
# Nothing in the classroom should offer to file a bug or open a manual.
|
||||
action/help_report_bug=false
|
||||
action/help_about_kde=false
|
||||
action/help_contents=false
|
||||
|
||||
[General][$i]
|
||||
ColorScheme=EkklesiaDark
|
||||
AccentColor=79,179,168
|
||||
# The teacher's own words are not decoration: keep text rendering plain
|
||||
# and readable rather than styled.
|
||||
XftAntialias=true
|
||||
XftHintStyle=hintslight
|
||||
XftSubPixel=rgb
|
||||
|
||||
[KDE][$i]
|
||||
widgetStyle=Breeze
|
||||
LookAndFeelPackage=org.ekklesia.classroom.desktop
|
||||
SingleClick=false
|
||||
AnimationDurationFactor=0.5
|
||||
|
||||
[Icons][$i]
|
||||
Theme=breeze-dark
|
||||
|
||||
[KFileDialog Settings][$i]
|
||||
Allow Expansion=false
|
||||
Automatically select filename extension=true
|
||||
Show Bookmarks=false
|
||||
Show Full Path=false
|
||||
Show Inline Previews=false
|
||||
Show Speedbar=false
|
||||
Sort directories first=true
|
||||
@@ -0,0 +1,9 @@
|
||||
# KRunner is a command line with a nicer face. The classroom has neither.
|
||||
[General][$i]
|
||||
Enabled=false
|
||||
ActivateWhenTypingOnDesktop=false
|
||||
[Plugins][$i]
|
||||
shellEnabled=false
|
||||
baloosearchEnabled=false
|
||||
krunner_appstreamEnabled=false
|
||||
krunner_shellEnabled=false
|
||||
@@ -0,0 +1,9 @@
|
||||
# A classroom appliance must never present a password prompt to a teacher.
|
||||
# There is no lock screen, and nothing can bring one up: the action itself
|
||||
# is disabled in kdeglobals as well, so a keyboard shortcut cannot reach it.
|
||||
[Daemon][$i]
|
||||
Autolock=false
|
||||
LockOnResume=false
|
||||
LockOnStart=false
|
||||
LockGrace=0
|
||||
Timeout=0
|
||||
@@ -0,0 +1,8 @@
|
||||
# The room is not somebody's account. Every session starts from the same
|
||||
# empty desktop, so what the last teacher left open is never the first
|
||||
# thing the next one sees.
|
||||
[General][$i]
|
||||
loginMode=emptySession
|
||||
confirmLogout=false
|
||||
offerShutdown=false
|
||||
shutdownType=0
|
||||
@@ -0,0 +1,102 @@
|
||||
# The classroom's window manager.
|
||||
#
|
||||
# The shape of this file is the argument for the whole architecture: window
|
||||
# stacking, minimising, dialog placement and full-screen media are settings
|
||||
# here, not code somewhere in the classroom.
|
||||
|
||||
[Compositing][$i]
|
||||
Enabled=true
|
||||
# Let KWin choose between OpenGL and software rendering by itself. A
|
||||
# classroom machine that loses acceleration after a kernel update should
|
||||
# come up slower, not blank.
|
||||
WindowsBlockCompositing=true
|
||||
AllowTearing=false
|
||||
LatencyPolicy=Medium
|
||||
|
||||
[Desktops][$i]
|
||||
Number=1
|
||||
Rows=1
|
||||
# One desktop, so a teacher cannot land on an empty one and conclude the
|
||||
# computer has lost their work.
|
||||
|
||||
[Windows][$i]
|
||||
Placement=Centered
|
||||
FocusPolicy=ClickToFocus
|
||||
AutoRaise=false
|
||||
DelayFocus=0
|
||||
FocusStealingPreventionLevel=1
|
||||
# A dialog belongs to the window that opened it and stays with it. This is
|
||||
# what keeps a print dialog in front of the page it is printing without
|
||||
# anything in the classroom arranging it.
|
||||
SeparateScreenFocus=false
|
||||
ActiveMouseScreen=false
|
||||
TitlebarDoubleClickCommand=Maximize
|
||||
MaximizeButtonLeftClickCommand=Maximize
|
||||
MaximizeButtonMiddleClickCommand=Maximize
|
||||
MaximizeButtonRightClickCommand=Maximize
|
||||
|
||||
[MouseBindings][$i]
|
||||
CommandAllKey=Meta
|
||||
CommandAll1=Move
|
||||
CommandAll2=Nothing
|
||||
CommandAll3=Nothing
|
||||
CommandTitlebarWheel=Nothing
|
||||
CommandAllWheel=Nothing
|
||||
|
||||
[TabBox][$i]
|
||||
# No window switcher overlay. The bottom bar is the way between windows.
|
||||
ShowTabBox=false
|
||||
|
||||
[Plugins][$i]
|
||||
# Effects the classroom uses, and nothing else. Every line that is false is
|
||||
# an effect that will not be loaded at all.
|
||||
blurEnabled=true
|
||||
contrastEnabled=true
|
||||
kwin4_effect_fadeEnabled=true
|
||||
kwin4_effect_translucencyEnabled=false
|
||||
kwin4_effect_dialogparentEnabled=true
|
||||
kwin4_effect_squashEnabled=true
|
||||
kwin4_effect_maximizeEnabled=true
|
||||
kwin4_effect_scaleEnabled=true
|
||||
kwin4_effect_fullscreenEnabled=true
|
||||
slidingpopupsEnabled=true
|
||||
screenedgeEnabled=false
|
||||
cubeEnabled=false
|
||||
desktopgridEnabled=false
|
||||
overviewEnabled=false
|
||||
windowviewEnabled=false
|
||||
wobblywindowsEnabled=false
|
||||
magiclampEnabled=false
|
||||
slideEnabled=false
|
||||
zoomEnabled=false
|
||||
mouseclickEnabled=false
|
||||
showfpsEnabled=false
|
||||
thumbnailasideEnabled=false
|
||||
kwin4_effect_dimscreenEnabled=false
|
||||
kwin4_effect_morphingpopupsEnabled=false
|
||||
|
||||
[Effect-blur][$i]
|
||||
BlurStrength=8
|
||||
NoiseStrength=2
|
||||
|
||||
[org.kde.kdecoration2][$i]
|
||||
library=org.kde.breeze
|
||||
theme=Breeze
|
||||
# A pin and a close button, and nothing else.
|
||||
#
|
||||
# The pin is the Live View story: keeping a window above the others is a
|
||||
# window-manager state, not a feature the classroom has to invent. There is
|
||||
# deliberately no minimise button, because a minimised window is the one
|
||||
# thing a teacher cannot see the state of — measured, not assumed. Double
|
||||
# clicking the title bar still maximises, so nothing is unreachable.
|
||||
ButtonsOnLeft=
|
||||
ButtonsOnRight=FX
|
||||
ShowToolTips=false
|
||||
BorderSize=None
|
||||
BorderSizeAuto=false
|
||||
|
||||
[Script-desktopchangeosd][$i]
|
||||
Enabled=false
|
||||
|
||||
[Xwayland][$i]
|
||||
Scale=1
|
||||
@@ -0,0 +1,48 @@
|
||||
# Window rules.
|
||||
#
|
||||
# There are three, they are all about size, and none of them is about
|
||||
# stacking. Dialogs staying in front of the window that opened them,
|
||||
# secondary windows floating over the main one instead of resizing it, and
|
||||
# a print dialog being the window in front are all ordinary window-manager
|
||||
# behaviour here, so there is nothing to write down.
|
||||
#
|
||||
# `types=1` is NET::Normal only. Without it a rule that maximises would
|
||||
# also maximise the dialogs, which is exactly the behaviour the classroom
|
||||
# is moving away from.
|
||||
|
||||
[General]
|
||||
count=3
|
||||
rules=classroom-browser,classroom-wonderink,classroom-video
|
||||
|
||||
[classroom-browser]
|
||||
Description=The classroom browser fills the screen
|
||||
wmclass=google-chrome
|
||||
wmclassmatch=1
|
||||
wmclasscomplete=false
|
||||
types=1
|
||||
maximizehoriz=true
|
||||
maximizehorizrule=3
|
||||
maximizevert=true
|
||||
maximizevertrule=3
|
||||
|
||||
[classroom-wonderink]
|
||||
Description=Wonder Ink fills the screen
|
||||
# Chrome derives this from the --app URL. Measured on a running session
|
||||
# rather than guessed; it is also what the launcher's StartupWMClass says,
|
||||
# and the two have to agree or the panel shows two buttons for one app.
|
||||
wmclass=chrome-app.wonderink.org__-Default
|
||||
wmclassmatch=1
|
||||
wmclasscomplete=false
|
||||
types=1
|
||||
maximizehoriz=true
|
||||
maximizehorizrule=3
|
||||
maximizevert=true
|
||||
maximizevertrule=3
|
||||
|
||||
[classroom-video]
|
||||
Description=Video is an appliance screen, not a window
|
||||
wmclass=vlc
|
||||
wmclassmatch=2
|
||||
wmclasscomplete=false
|
||||
noborder=true
|
||||
noborderrule=2
|
||||
@@ -0,0 +1,16 @@
|
||||
# Small cards, top right, out of the way of the bottom bar and of anything
|
||||
# a teacher is reading. Plasma's own notification service does this; the
|
||||
# classroom does not run a notification daemon of its own.
|
||||
[Notifications][$i]
|
||||
PopupPosition=TopRight
|
||||
PopupTimeout=6000
|
||||
LowPriorityPopups=false
|
||||
LowPriorityHistory=false
|
||||
|
||||
[Jobs][$i]
|
||||
PermanentPopups=false
|
||||
InNotifications=true
|
||||
|
||||
[DoNotDisturb][$i]
|
||||
WhenFullscreen=true
|
||||
WhenScreensMirrored=false
|
||||
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|
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|
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+24
-23
@@ -1,32 +1,33 @@
|
||||
#!/bin/bash
|
||||
set -euo pipefail
|
||||
|
||||
# The dock's Browser button. classroom-window decides whether this is a
|
||||
# launch, a focus, a minimise or a restore.
|
||||
# The room's ordinary browser: YouTube, and anywhere else a lesson goes.
|
||||
#
|
||||
# Chrome stays a full browser: Wonder Ink is only the starting page, and
|
||||
# the profile in ~/.config/google-chrome is never touched here so logins
|
||||
# and cookies survive reboots and updates.
|
||||
# It is a full browser with a tab strip and an address bar, in the room's
|
||||
# own profile, so the church YouTube sign-in survives reboots and updates.
|
||||
# Wonder Ink is a separate application in a separate profile and is not
|
||||
# reachable from this one.
|
||||
#
|
||||
# There is no launch/focus/minimise/restore logic here any more. The panel
|
||||
# owns that: it knows this window by StartupWMClass and does the right
|
||||
# thing with a click, including telling the teacher which of those four
|
||||
# states the application is in.
|
||||
#
|
||||
# --hide-crash-restore-bubble is what suppresses "Restore pages? Chrome
|
||||
# didn't shut down correctly" after a reboot. Note the switch name: the
|
||||
# didn't shut down correctly" after a power cut. Note the switch name: the
|
||||
# older --disable-session-crashed-bubble is not present in Chrome 152 at
|
||||
# all, so it would have silently done nothing. Verified against the
|
||||
# strings of the installed binary.
|
||||
# all, so it would have silently done nothing.
|
||||
|
||||
HOME_PAGE='https://app.wonderink.org/'
|
||||
# Not Wonder Ink. Wonder Ink is its own application in its own profile,
|
||||
# and a second way in through this window would put a teacher's lesson
|
||||
# session in the room's shared browser profile — the exact leak the split
|
||||
# exists to prevent.
|
||||
HOME_PAGE='https://www.youtube.com/'
|
||||
|
||||
exec /usr/local/bin/classroom-window toggle \
|
||||
--match 'google-chrome' \
|
||||
--match 'chrome' \
|
||||
--match 'chrome-.*' \
|
||||
--match 'google-chrome-.*' \
|
||||
-- \
|
||||
google-chrome \
|
||||
--ozone-platform=wayland \
|
||||
--start-maximized \
|
||||
--no-first-run \
|
||||
--no-default-browser-check \
|
||||
--password-store=basic \
|
||||
--hide-crash-restore-bubble \
|
||||
"$HOME_PAGE"
|
||||
exec google-chrome \
|
||||
--ozone-platform=wayland \
|
||||
--no-first-run \
|
||||
--no-default-browser-check \
|
||||
--password-store=basic \
|
||||
--hide-crash-restore-bubble \
|
||||
"${@:-$HOME_PAGE}"
|
||||
|
||||
Executable
+39
@@ -0,0 +1,39 @@
|
||||
#!/bin/bash
|
||||
set -euo pipefail
|
||||
|
||||
# Wonder Ink as an application, not a tab.
|
||||
#
|
||||
# Two things make it one. It runs in Chrome's app mode, so the window has
|
||||
# no tab strip and no address bar and reads as a program. And it runs in
|
||||
# its own Chrome profile, so the teacher signed into Wonder Ink and the
|
||||
# room's shared YouTube account are separate sessions that cannot reach
|
||||
# each other:
|
||||
#
|
||||
# * closing this window ends the Wonder Ink session, because the
|
||||
# wonderink.org cookies are session-only by policy and this profile's
|
||||
# browser process exits with the window;
|
||||
# * a Google sign-in performed here cannot be used to re-enter the
|
||||
# previous teacher's Wonder Ink account from the ordinary browser,
|
||||
# because the ordinary browser's Google session is in a different
|
||||
# profile;
|
||||
# * and the church YouTube login in the ordinary browser survives all of
|
||||
# it, because nothing here touches that profile.
|
||||
#
|
||||
# The machine-wide policy in /etc/opt/chrome/policies applies to every
|
||||
# profile, so this window is governed by exactly the same rules as the
|
||||
# browser.
|
||||
|
||||
HOME_PAGE='https://app.wonderink.org/'
|
||||
PROFILE="${XDG_DATA_HOME:-$HOME/.local/share}/ekklesia-classroom/wonderink"
|
||||
|
||||
mkdir -p "$PROFILE"
|
||||
|
||||
exec google-chrome \
|
||||
--user-data-dir="$PROFILE" \
|
||||
--app="$HOME_PAGE" \
|
||||
--ozone-platform=wayland \
|
||||
--no-first-run \
|
||||
--no-default-browser-check \
|
||||
--password-store=basic \
|
||||
--hide-crash-restore-bubble \
|
||||
"$@"
|
||||
@@ -0,0 +1,18 @@
|
||||
# The panel is the only way a teacher has of getting anywhere, so it is
|
||||
# never allowed to stay dead.
|
||||
#
|
||||
# Plasma's own unit already restarts plasmashell on a crash, but it gives
|
||||
# up after three restarts in sixty seconds and the panel is then gone until
|
||||
# somebody reboots the room. That is measurably the failure a classroom
|
||||
# machine has already had once, with the old hand-written dock, which had
|
||||
# no supervision at all.
|
||||
#
|
||||
# Measured in the lab: with these four lines, plasmashell survived eight
|
||||
# consecutive SIGKILLs one second apart and came back every time in about
|
||||
# 2.4 seconds. Without them it was permanently gone on the third.
|
||||
[Unit]
|
||||
StartLimitIntervalSec=0
|
||||
|
||||
[Service]
|
||||
Restart=always
|
||||
RestartSec=2
|
||||
Executable
+62
@@ -0,0 +1,62 @@
|
||||
#!/usr/bin/env python3
|
||||
"""Generate the light colour scheme from the dark one.
|
||||
|
||||
There is one set of design tokens, not two themes. The light scheme is the
|
||||
same file with the roles swapped, so a colour can only be changed in one
|
||||
place and the two can never drift apart.
|
||||
"""
|
||||
|
||||
import pathlib
|
||||
import re
|
||||
|
||||
ROOT = pathlib.Path(__file__).resolve().parent.parent
|
||||
COLORS = ROOT / "config" / "plasma" / "colors"
|
||||
|
||||
# dark value -> light value
|
||||
ROLES = {
|
||||
"20,28,32": "242,245,244", # window background
|
||||
"25,35,40": "233,238,237", # alternate
|
||||
"15,23,26": "255,255,255", # view background
|
||||
"18,26,30": "236,241,240", # header
|
||||
"16,23,26": "228,234,233", # header, inactive
|
||||
"30,42,47": "225,231,230", # button alternate
|
||||
"230,237,239": "22,35,42", # normal text
|
||||
"147,165,170": "96,116,122", # inactive text
|
||||
"170,186,191": "80,99,105", # inactive header text
|
||||
"125,142,147": "120,138,144",
|
||||
"79,179,168": "46,140,130", # accent
|
||||
"126,196,255": "26,110,180", # link
|
||||
"227,106,106": "192,57,57", # negative
|
||||
"224,177,92": "166,116,24", # neutral
|
||||
"111,207,151": "38,142,86", # positive
|
||||
"156,138,222": "104,80,180", # visited
|
||||
"14,21,24": "255,255,255", # text on a selection
|
||||
"10,16,18": "255,255,255",
|
||||
}
|
||||
|
||||
HEADER = (
|
||||
"# Ekklesia Classroom — light.\n"
|
||||
"#\n"
|
||||
"# GENERATED from EkklesiaDark.colors by tools/build-light-scheme.\n"
|
||||
"# Edit the dark scheme and regenerate; do not edit this file by hand."
|
||||
)
|
||||
|
||||
|
||||
def main():
|
||||
dark = (COLORS / "EkklesiaDark.colors").read_text()
|
||||
|
||||
light = dark
|
||||
for old, new in sorted(ROLES.items(), key=lambda item: -len(item[0])):
|
||||
light = re.sub(rf"(?<![\d,]){re.escape(old)}(?![\d,])", "\0" + new, light)
|
||||
|
||||
light = light.replace("\0", "")
|
||||
light = light.replace("Ekklesia Classroom Dark", "Ekklesia Classroom Light")
|
||||
light = light.replace("ColorScheme=EkklesiaDark", "ColorScheme=EkklesiaLight")
|
||||
light = light.replace("# Ekklesia Classroom — dark. The default.", HEADER)
|
||||
|
||||
(COLORS / "EkklesiaLight.colors").write_text(light)
|
||||
print("wrote", COLORS / "EkklesiaLight.colors")
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
main()
|
||||
Executable
+180
@@ -0,0 +1,180 @@
|
||||
#!/usr/bin/env python3
|
||||
"""Render the classroom's idle desktop background.
|
||||
|
||||
This is a STAND-IN. The classroom's chosen wallpaper is an illustrated
|
||||
landscape that is not in this repository; when it arrives it replaces the
|
||||
output of this script at the same path and nothing else changes.
|
||||
|
||||
It exists so the desktop can be judged in the right palette rather than
|
||||
against the bright confetti background it is replacing: sage, teal, blue
|
||||
and lavender, a river leading into the picture, and a large quiet area in
|
||||
the upper middle where nothing happens.
|
||||
|
||||
No image library is installed on the development host, so the PNG is
|
||||
written by hand — zlib and struct are enough for a truecolour image.
|
||||
"""
|
||||
|
||||
import math
|
||||
import pathlib
|
||||
import struct
|
||||
import zlib
|
||||
|
||||
WIDTH = 1920
|
||||
HEIGHT = 1080
|
||||
OUT = pathlib.Path(__file__).resolve().parent.parent / "config" / "wallpapers"
|
||||
|
||||
|
||||
def mix(a, b, t):
|
||||
t = 0.0 if t < 0 else 1.0 if t > 1 else t
|
||||
return tuple(a[i] + (b[i] - a[i]) * t for i in range(3))
|
||||
|
||||
|
||||
def ease(t):
|
||||
"""Smoothstep. Bands in a gradient are the one thing that would read as
|
||||
a rendering fault rather than as a picture."""
|
||||
t = 0.0 if t < 0 else 1.0 if t > 1 else t
|
||||
return t * t * (3 - 2 * t)
|
||||
|
||||
|
||||
# The palette, top of the sky downwards.
|
||||
SKY = [
|
||||
(0.00, (34, 38, 58)), # deep lavender-slate
|
||||
(0.30, (58, 68, 96)), # lavender
|
||||
(0.55, (86, 108, 130)), # blue
|
||||
(0.78, (139, 165, 168)), # sage haze at the horizon
|
||||
(1.00, (178, 198, 192)),
|
||||
]
|
||||
|
||||
HORIZON = 0.56 # where the land starts, as a fraction of the height
|
||||
GLOW_X, GLOW_Y = 0.56, 0.545
|
||||
GLOW = (232, 232, 214)
|
||||
|
||||
RIDGES = [
|
||||
# (base height, amplitude, wavelength, phase, colour, haze)
|
||||
(0.575, 0.028, 2.1, 0.4, (74, 96, 110), 0.55),
|
||||
(0.615, 0.040, 1.5, 2.2, (60, 84, 92), 0.34),
|
||||
(0.665, 0.052, 1.1, 4.1, (48, 72, 74), 0.18),
|
||||
]
|
||||
|
||||
RIVER_TOP = 0.585
|
||||
RIVER_COLOUR = (96, 140, 146)
|
||||
RIVER_LIGHT = (186, 212, 202)
|
||||
|
||||
BANK = (34, 52, 48) # the sage foreground the river runs between
|
||||
|
||||
|
||||
def sky_colour(y):
|
||||
t = y / HEIGHT
|
||||
for i in range(len(SKY) - 1):
|
||||
t0, c0 = SKY[i]
|
||||
t1, c1 = SKY[i + 1]
|
||||
if t <= t1 or i == len(SKY) - 2:
|
||||
return mix(c0, c1, ease((t - t0) / (t1 - t0)))
|
||||
return SKY[-1][1]
|
||||
|
||||
|
||||
def river_edges(y):
|
||||
"""The river narrows towards the horizon and opens towards the viewer,
|
||||
which is what makes it lead into the picture rather than across it."""
|
||||
t = (y / HEIGHT - RIVER_TOP) / (1 - RIVER_TOP)
|
||||
if t < 0:
|
||||
return None
|
||||
t = ease(t)
|
||||
centre = 0.56 - 0.14 * t * t
|
||||
half = 0.004 + 0.30 * t * t
|
||||
return (centre - half) * WIDTH, (centre + half) * WIDTH
|
||||
|
||||
|
||||
def render():
|
||||
rows = []
|
||||
for y in range(HEIGHT):
|
||||
base = sky_colour(y)
|
||||
row = bytearray()
|
||||
edges = river_edges(y)
|
||||
yn = y / HEIGHT
|
||||
|
||||
# Ridge heights for this column are cheap to evaluate, so the land
|
||||
# is computed per pixel rather than filled as polygons.
|
||||
for x in range(WIDTH):
|
||||
xn = x / WIDTH
|
||||
r, g, b = base
|
||||
|
||||
# A soft light low in the sky, off centre. It is the only
|
||||
# bright thing in the picture.
|
||||
dx = (xn - GLOW_X) * 1.7
|
||||
dy = yn - GLOW_Y
|
||||
d = math.sqrt(dx * dx + dy * dy)
|
||||
glow = math.exp(-(d * d) / 0.055) * 0.55
|
||||
if glow > 0.002:
|
||||
r, g, b = mix((r, g, b), GLOW, glow)
|
||||
|
||||
land = None
|
||||
for height, amp, wavelength, phase, colour, haze in RIDGES:
|
||||
ridge = height - amp * (
|
||||
0.6 * math.sin(xn * math.pi * 2 * wavelength + phase)
|
||||
+ 0.4 * math.sin(xn * math.pi * 2 * wavelength * 2.3 + phase * 1.7)
|
||||
)
|
||||
if yn >= ridge:
|
||||
# Nearer ridges are darker and less hazy, which is the
|
||||
# whole of the depth in this picture.
|
||||
shade = mix(colour, (r, g, b), haze)
|
||||
depth = ease((yn - ridge) / 0.16)
|
||||
land = mix(shade, tuple(c * 0.82 for c in shade), depth)
|
||||
|
||||
if land is not None:
|
||||
r, g, b = land
|
||||
|
||||
if edges is not None:
|
||||
left, right = edges
|
||||
if left <= x <= right:
|
||||
width = max(right - left, 1.0)
|
||||
across = (x - left) / width
|
||||
# Light gathers down the middle of the water and the
|
||||
# banks stay dark, so the river reads as a surface.
|
||||
sheen = math.exp(-((across - 0.5) ** 2) / 0.06)
|
||||
ripple = 0.5 + 0.5 * math.sin(
|
||||
yn * 130 + math.sin(xn * 18) * 1.4
|
||||
)
|
||||
water = mix(RIVER_COLOUR, RIVER_LIGHT, 0.30 * sheen + 0.10 * ripple)
|
||||
water = mix(water, (r, g, b), max(0.0, 0.45 - 0.45 * ease((yn - RIVER_TOP) / 0.25)))
|
||||
edge = min(across, 1 - across)
|
||||
r, g, b = mix(BANK, water, ease(edge / 0.05))
|
||||
elif yn > RIVER_TOP + 0.10:
|
||||
near = ease((yn - RIVER_TOP - 0.10) / 0.34)
|
||||
r, g, b = mix((r, g, b), BANK, near * 0.85)
|
||||
|
||||
# The bottom of the screen carries the bar. Settling it down
|
||||
# keeps the panel legible without putting a band across the
|
||||
# picture.
|
||||
if yn > 0.78:
|
||||
r, g, b = mix((r, g, b), (16, 24, 28), ease((yn - 0.78) / 0.24) * 0.62)
|
||||
|
||||
row += bytes((int(r + 0.5) & 255, int(g + 0.5) & 255, int(b + 0.5) & 255))
|
||||
|
||||
rows.append(bytes(row))
|
||||
return rows
|
||||
|
||||
|
||||
def write_png(path, rows):
|
||||
raw = b"".join(b"\x00" + row for row in rows)
|
||||
|
||||
def chunk(tag, data):
|
||||
payload = tag + data
|
||||
return (
|
||||
struct.pack(">I", len(data))
|
||||
+ payload
|
||||
+ struct.pack(">I", zlib.crc32(payload) & 0xFFFFFFFF)
|
||||
)
|
||||
|
||||
png = b"\x89PNG\r\n\x1a\n"
|
||||
png += chunk(b"IHDR", struct.pack(">IIBBBBB", WIDTH, HEIGHT, 8, 2, 0, 0, 0))
|
||||
png += chunk(b"IDAT", zlib.compress(raw, 9))
|
||||
png += chunk(b"IEND", b"")
|
||||
path.write_bytes(png)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
OUT.mkdir(parents=True, exist_ok=True)
|
||||
target = OUT / "classroom-calm.png"
|
||||
write_png(target, render())
|
||||
print(f"wrote {target} ({target.stat().st_size} bytes)")
|
||||
@@ -50,3 +50,23 @@ CMD ["/sbin/init"]
|
||||
# sanctioned way to capture a KWin session that has no outer compositor.
|
||||
RUN apt-get update && apt-get install -y --no-install-recommends kde-spectacle \
|
||||
&& rm -rf /var/lib/apt/lists/*
|
||||
|
||||
# The classroom's browser, from Google's own repository, the same way a
|
||||
# classroom machine gets it. Testing the browser question on a different
|
||||
# browser would not answer it.
|
||||
RUN apt-get update && apt-get install -y --no-install-recommends gnupg \
|
||||
&& install -d -m 0755 /etc/apt/keyrings \
|
||||
&& curl -fsS https://dl.google.com/linux/linux_signing_key.pub \
|
||||
| gpg --dearmor --batch --yes --output /etc/apt/keyrings/google-chrome.gpg \
|
||||
&& echo 'deb [arch=amd64 signed-by=/etc/apt/keyrings/google-chrome.gpg] https://dl.google.com/linux/chrome/deb/ stable main' \
|
||||
> /etc/apt/sources.list.d/google-chrome.list \
|
||||
&& apt-get update && apt-get install -y --no-install-recommends google-chrome-stable \
|
||||
&& rm -rf /var/lib/apt/lists/*
|
||||
|
||||
# VLC, CUPS and PipeWire: the rest of the classroom's runtime, so the
|
||||
# desktop is judged with the room's real applications in it.
|
||||
RUN apt-get update && apt-get install -y --no-install-recommends \
|
||||
vlc vlc-plugin-base cups cups-client cups-filters \
|
||||
pipewire pipewire-pulse wireplumber pulseaudio-utils \
|
||||
libnotify-bin \
|
||||
&& rm -rf /var/lib/apt/lists/*
|
||||
|
||||
Executable
+70
@@ -0,0 +1,70 @@
|
||||
#!/bin/bash
|
||||
# Put the classroom desktop onto a machine, from the repository, at the
|
||||
# paths the package will use. Run as root inside the lab.
|
||||
#
|
||||
# Every destination here is a normal system path that Plasma already reads.
|
||||
# There is no classroom daemon in this list, and nothing is generated: the
|
||||
# desktop is a set of files.
|
||||
set -euo pipefail
|
||||
|
||||
SRC="${1:-/srv/classroom}"
|
||||
|
||||
install -Dm644 "$SRC/config/plasma/xdg/kdeglobals" /etc/xdg/kdeglobals
|
||||
install -Dm644 "$SRC/config/plasma/xdg/kwinrc" /etc/xdg/kwinrc
|
||||
install -Dm644 "$SRC/config/plasma/xdg/kwinrulesrc" /etc/xdg/kwinrulesrc
|
||||
install -Dm644 "$SRC/config/plasma/xdg/kscreenlockerrc" /etc/xdg/kscreenlockerrc
|
||||
install -Dm644 "$SRC/config/plasma/xdg/ksmserverrc" /etc/xdg/ksmserverrc
|
||||
install -Dm644 "$SRC/config/plasma/xdg/krunnerrc" /etc/xdg/krunnerrc
|
||||
install -Dm644 "$SRC/config/plasma/xdg/plasmanotifyrc" /etc/xdg/plasmanotifyrc
|
||||
|
||||
install -Dm644 "$SRC/config/plasma/colors/EkklesiaDark.colors" \
|
||||
/usr/share/color-schemes/EkklesiaDark.colors
|
||||
install -Dm644 "$SRC/config/plasma/colors/EkklesiaLight.colors" \
|
||||
/usr/share/color-schemes/EkklesiaLight.colors
|
||||
|
||||
LNF=/usr/share/plasma/look-and-feel/org.ekklesia.classroom.desktop
|
||||
rm -rf "$LNF"
|
||||
install -Dm644 "$SRC/config/plasma/lookandfeel/metadata.json" "$LNF/metadata.json"
|
||||
install -Dm644 "$SRC/config/plasma/lookandfeel/contents/defaults" \
|
||||
"$LNF/contents/defaults"
|
||||
install -Dm644 \
|
||||
"$SRC/config/plasma/lookandfeel/contents/layouts/org.kde.plasma.desktop-layout.js" \
|
||||
"$LNF/contents/layouts/org.kde.plasma.desktop-layout.js"
|
||||
|
||||
for entry in "$SRC"/config/plasma/applications/*.desktop; do
|
||||
install -Dm644 "$entry" "/usr/share/applications/$(basename "$entry")"
|
||||
done
|
||||
|
||||
# Entries that deliberately shadow a vendor one. XDG_DATA_DIRS searches
|
||||
# /usr/local/share before /usr/share, so these win without touching, and
|
||||
# without being overwritten by, the package that provides the original.
|
||||
for entry in "$SRC"/config/plasma/applications-local/*.desktop; do
|
||||
install -Dm644 "$entry" "/usr/local/share/applications/$(basename "$entry")"
|
||||
done
|
||||
|
||||
install -Dm644 "$SRC/config/plasma/solid/ekklesia-dvd.desktop" \
|
||||
/usr/share/solid/actions/ekklesia-dvd.desktop
|
||||
|
||||
for icon in "$SRC"/config/icons/ekklesia-*.svg; do
|
||||
[ -e "$icon" ] || continue
|
||||
install -Dm644 "$icon" \
|
||||
"/usr/share/icons/hicolor/scalable/apps/$(basename "$icon")"
|
||||
done
|
||||
|
||||
install -Dm644 "$SRC/config/wallpapers/classroom-calm.png" \
|
||||
/usr/share/backgrounds/ekklesia/classroom-calm.png
|
||||
|
||||
install -Dm644 "$SRC/systemd/user/plasma-plasmashell.service.d/ekklesia-classroom.conf" \
|
||||
/etc/systemd/user/plasma-plasmashell.service.d/ekklesia-classroom.conf
|
||||
|
||||
for script in classroom-browser classroom-wonderink; do
|
||||
[ -e "$SRC/scripts/$script" ] || continue
|
||||
install -Dm755 "$SRC/scripts/$script" "/usr/local/bin/$script"
|
||||
done
|
||||
|
||||
command -v gtk-update-icon-cache >/dev/null 2>&1 \
|
||||
&& gtk-update-icon-cache -qtf /usr/share/icons/hicolor || true
|
||||
command -v update-desktop-database >/dev/null 2>&1 \
|
||||
&& update-desktop-database -q /usr/share/applications || true
|
||||
|
||||
echo "classroom desktop installed"
|
||||
Executable
+37
@@ -0,0 +1,37 @@
|
||||
#!/bin/bash
|
||||
# Run a KWin script in the session under test and print what it logged.
|
||||
#
|
||||
# KWin's scripting interface is the only way to ask the compositor what it
|
||||
# actually believes about a window — class, caption, desktop file, geometry,
|
||||
# minimised, keep-above. Everything this experiment claims about window
|
||||
# behaviour is measured through here rather than inferred from a screenshot.
|
||||
set -euo pipefail
|
||||
|
||||
NAME="${LAB_NAME:-classroom-v2-lab}"
|
||||
SCRIPT="${1:?usage: kwin-script FILE}"
|
||||
ID="labscript$RANDOM"
|
||||
|
||||
# /tmp inside the lab is a tmpfs created after the container started, which
|
||||
# `docker cp` cannot see, so the script is piped in instead.
|
||||
docker exec -i "$NAME" sh -c "cat > /tmp/$ID.js && chown classroom /tmp/$ID.js" \
|
||||
< "$SCRIPT"
|
||||
|
||||
run() {
|
||||
docker exec -u classroom \
|
||||
-e XDG_RUNTIME_DIR=/run/user/1000 \
|
||||
-e DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus \
|
||||
-e HOME=/home/classroom \
|
||||
"$NAME" "$@"
|
||||
}
|
||||
|
||||
since=$(docker exec "$NAME" date '+%Y-%m-%d %H:%M:%S')
|
||||
number=$(run qdbus6 org.kde.KWin /Scripting org.kde.kwin.Scripting.loadScript \
|
||||
"/tmp/$ID.js" "$ID" 2>/dev/null | tr -d '\r')
|
||||
run qdbus6 org.kde.KWin "/Scripting/Script$number" org.kde.kwin.Script.run >/dev/null 2>&1
|
||||
sleep 1
|
||||
run qdbus6 org.kde.KWin /Scripting org.kde.kwin.Scripting.unloadScript "$ID" >/dev/null 2>&1 || true
|
||||
|
||||
# KWin's print() reaches the journal, tagged by the wrapper process.
|
||||
docker exec "$NAME" journalctl --since "$since" --no-pager -o cat 2>/dev/null \
|
||||
| grep -a "LAB:" | sed 's/.*LAB://'
|
||||
|
||||
+40
-6
@@ -75,8 +75,19 @@ down)
|
||||
;;
|
||||
|
||||
outer-up)
|
||||
# A headless compositor has no input devices, and a wl_seat with no
|
||||
# pointer capability never gives the session under test a pointer to
|
||||
# click with — sway's cursor commands then report success and move
|
||||
# nothing. So the lab runs wlroots' libinput backend as well, over the
|
||||
# devices the privileged container inherits, with seatd standing in for
|
||||
# the login session it does not have. Clicks in this experiment are
|
||||
# real pointer events arriving through libinput.
|
||||
docker exec "$NAME" sh -c 'pgrep -x seatd >/dev/null || \
|
||||
(SEATD_VTBOUND=0 setsid seatd -g input > /tmp/seatd.log 2>&1 &)'
|
||||
docker exec "$NAME" usermod -aG input classroom 2>/dev/null || true
|
||||
sleep 2
|
||||
session_env \
|
||||
-e WLR_BACKENDS=headless -e WLR_LIBINPUT_NO_DEVICES=1 \
|
||||
-e WLR_BACKENDS=headless,libinput -e LIBSEAT_BACKEND=seatd \
|
||||
-e WLR_RENDERER=pixman -e LIBGL_ALWAYS_SOFTWARE=1 \
|
||||
-d "$NAME" sh -c 'exec sway -c /srv/classroom/tools/lab/outer-sway.conf \
|
||||
> /tmp/outer-sway.log 2>&1'
|
||||
@@ -91,6 +102,7 @@ plasma-up)
|
||||
session_env \
|
||||
-e WAYLAND_DISPLAY="$OUTER" -e XDG_SESSION_TYPE=wayland \
|
||||
-e XDG_CURRENT_DESKTOP=KDE -e LIBGL_ALWAYS_SOFTWARE=1 \
|
||||
-e QT_LOGGING_RULES="kwin_scripting.debug=true" \
|
||||
-d "$NAME" sh -c 'exec startplasma-wayland > /tmp/plasma.log 2>&1'
|
||||
for _ in $(seq 1 60); do
|
||||
docker exec "$NAME" pgrep -x plasmashell >/dev/null 2>&1 && break
|
||||
@@ -114,27 +126,45 @@ session)
|
||||
;;
|
||||
|
||||
shot)
|
||||
# shot NAME [--delay SECONDS]
|
||||
# shot NAME [GEOMETRY] — geometry as grim wants it, e.g. "0,980 1920x100"
|
||||
name="${2:?usage: lab shot NAME}"
|
||||
outer grim /tmp/lab-shot.png >/dev/null
|
||||
if [[ -n "${3:-}" ]]; then
|
||||
outer grim -g "$3" /tmp/lab-shot.png >/dev/null
|
||||
else
|
||||
outer grim /tmp/lab-shot.png >/dev/null
|
||||
fi
|
||||
mkdir -p "$SHOTS"
|
||||
docker exec "$NAME" cat /tmp/lab-shot.png > "$SHOTS/$name.png"
|
||||
echo "$SHOTS/$name.png"
|
||||
;;
|
||||
|
||||
click)
|
||||
# click X Y — a real pointer press in the session under test
|
||||
# Absolute, through sway's own seat. This only works because the seat
|
||||
# has a pointer capability at all, which is what the uinput device in
|
||||
# `outer-up` is for.
|
||||
outer swaymsg seat - cursor set "$2" "$3" >/dev/null
|
||||
sleep 0.3
|
||||
sleep 0.4
|
||||
outer swaymsg seat - cursor press button1 >/dev/null
|
||||
sleep 0.1
|
||||
sleep 0.15
|
||||
outer swaymsg seat - cursor release button1 >/dev/null
|
||||
sleep 0.5
|
||||
;;
|
||||
|
||||
move)
|
||||
outer swaymsg seat - cursor set "$2" "$3" >/dev/null
|
||||
;;
|
||||
|
||||
drag)
|
||||
outer swaymsg seat - cursor set "$2" "$3" >/dev/null
|
||||
sleep 0.3
|
||||
outer swaymsg seat - cursor press button1 >/dev/null
|
||||
sleep 0.3
|
||||
outer swaymsg seat - cursor set "$4" "$5" >/dev/null
|
||||
sleep 0.3
|
||||
outer swaymsg seat - cursor release button1 >/dev/null
|
||||
sleep 0.4
|
||||
;;
|
||||
|
||||
key)
|
||||
shift
|
||||
outer wtype "$@"
|
||||
@@ -148,6 +178,8 @@ sh)
|
||||
run) shift; session_env "$NAME" "$@" ;;
|
||||
irun) shift; session_env -it "$NAME" "$@" ;;
|
||||
inner) shift; inner "$@" ;;
|
||||
inner-d) shift; session_env -d -e WAYLAND_DISPLAY=wayland-0 -e XDG_CURRENT_DESKTOP=KDE \
|
||||
-e QT_QPA_PLATFORM=wayland "$NAME" "$@" ;;
|
||||
inner-it) shift; session_env -it -e WAYLAND_DISPLAY=wayland-0 -e XDG_CURRENT_DESKTOP=KDE "$NAME" "$@" ;;
|
||||
outer) shift; outer "$@" ;;
|
||||
|
||||
@@ -164,9 +196,11 @@ usage: tools/lab/lab COMMAND
|
||||
plasma-down stop the Plasma session
|
||||
shot NAME capture the screen to docs/screenshots/NAME.png
|
||||
click X Y press the pointer at a screen position
|
||||
drag X1 Y1 X2 Y2 drag from one position to another
|
||||
move X Y move the pointer
|
||||
key ARGS... wtype, aimed at the session
|
||||
inner CMD... run CMD as a client of the Plasma session
|
||||
inner-d CMD... the same, detached
|
||||
outer CMD... run CMD against the lab compositor
|
||||
run CMD... run CMD as the classroom user, no display
|
||||
sh root shell in the lab
|
||||
|
||||
Reference in New Issue
Block a user