feat: add an own lock screen with the bubble and your wallpaper

tests/test_wallpaper.cpp

@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+// The desktop's picture for face-unlock's own lock screen, from what the
+// wallpaper programs say (real output of swaybg 1.2, awww 0.12, swww 0.9,
+// hyprpaper 0.7 and 0.8, wpaperd 1.3), and what the setting picks.
+
+#include "wallpaper.h"
+
+#include <QDir>
+#include <QFile>
+#include <QTemporaryDir>
+
+#include <cstdio>
+
+namespace
+{
+int failures = 0;
+
+void check(bool ok, const char *what)
+{
+    std::printf("%s  %s\n", ok ? "ok  " : "FAIL", what);
+    if (!ok) {
+        ++failures;
+    }
+}
+
+using Map = QHash<QString, QString>;
+} // namespace
+
+int main()
+{
+    check(Wallpaper::fromSwaybg({QStringLiteral("-i"), QStringLiteral("/w/a.jpg"), QStringLiteral("-m"), QStringLiteral("fill")})
+              == Map{{QString(), QStringLiteral("/w/a.jpg")}},
+          "swaybg: one picture everywhere");
+    check(Wallpaper::fromSwaybg({QStringLiteral("-o"), QStringLiteral("eDP-1"), QStringLiteral("-i"), QStringLiteral("/w/a.jpg"), QStringLiteral("--output=DP-2"),
+                                 QStringLiteral("--image=/w/b.png"), QStringLiteral("-o"), QStringLiteral("*"), QStringLiteral("-c"), QStringLiteral("000000")})
+              == Map{{QStringLiteral("eDP-1"), QStringLiteral("/w/a.jpg")}, {QStringLiteral("DP-2"), QStringLiteral("/w/b.png")}},
+          "swaybg: one per output, a colour is no picture");
+
+    check(Wallpaper::fromAwww(QStringLiteral(": winit: 1280x742, scale: 1, currently displaying: image: /w/my pic.jpg\n"))
+              == Map{{QStringLiteral("winit"), QStringLiteral("/w/my pic.jpg")}},
+          "awww: with the namespace in front, spaces in the path");
+    check(Wallpaper::fromAwww(QStringLiteral("eDP-1: 1920x1080, scale: 1, currently displaying: image: /w/a.jpg\n"
+                                             "DP-2: 2560x1440, scale: 1, currently displaying: color: 000000\n"))
+              == Map{{QStringLiteral("eDP-1"), QStringLiteral("/w/a.jpg")}},
+          "swww: a colour is no picture");
+
+    check(Wallpaper::fromList(QStringLiteral("WAYLAND-1: /w/a.jpg\nDP-2: /w/b.png\n"))
+              == Map{{QStringLiteral("WAYLAND-1"), QStringLiteral("/w/a.jpg")}, {QStringLiteral("DP-2"), QStringLiteral("/w/b.png")}},
+          "hyprpaper 0.8 and wpaperd");
+    check(Wallpaper::fromList(QStringLiteral("eDP-1 = /w/a.jpg\n")) == Map{{QStringLiteral("eDP-1"), QStringLiteral("/w/a.jpg")}}, "hyprpaper 0.7");
+    check(Wallpaper::fromList(QStringLiteral("no wallpapers active\n")).isEmpty(), "nothing shown, nothing found");
+
+    QTemporaryDir dir;
+    QFile a(dir.filePath(QStringLiteral("a.jpg")));
+    check(a.open(QIODevice::WriteOnly), "a picture to point at");
+    a.close();
+    const QUrl url = QUrl::fromLocalFile(a.fileName());
+
+    check(Wallpaper::forLock(QStringLiteral("none")).isEmpty(), "none is none");
+    check(Wallpaper::forLock(a.fileName()) == QHash<QString, QUrl>{{QString(), url}}, "a picture set goes everywhere");
+    check(Wallpaper::forLock(dir.path()) == QHash<QString, QUrl>{{QString(), url}}, "a folder set gives one from it");
+    check(Wallpaper::forLock(dir.filePath(QStringLiteral("gone.jpg"))).isEmpty(), "a picture that is gone gives none");
+
+    const QUrl b = QUrl::fromLocalFile(QStringLiteral("/w/b.png"));
+    const QHash<QString, QUrl> both{{QStringLiteral("eDP-1"), url}, {QString(), b}};
+    check(Wallpaper::pick(both, QStringLiteral("eDP-1")) == url, "an output gets its own");
+    check(Wallpaper::pick(both, QStringLiteral("DP-2")) == b, "else the one for all");
+    check(Wallpaper::pick({{QStringLiteral("eDP-1"), url}}, QStringLiteral("winit")) == url, "else any of the desktop's");
+    check(Wallpaper::pick({}, QStringLiteral("eDP-1")).isEmpty(), "and none when there is none");
+
+    std::printf("\n%s\n", failures ? "SOME CHECKS FAILED" : "all checks passed");
+    return failures ? 1 : 0;
+}