376 lines
13 KiB
QML
376 lines
13 KiB
QML
pragma Singleton
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// Display configuration: resolution, refresh rate, scale, and rotation.
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//
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// This is the only page in Panama Settings where a wrong value can leave you
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// unable to SEE the screen well enough to undo it. A mode the display cannot
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// show, or a scale that makes everything unreadable, is not recoverable through
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// the same UI that caused it.
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//
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// So a change is never applied irreversibly. It is applied, then reverted
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// automatically after a countdown unless confirmed -- the same contract every
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// desktop uses for this one setting, and for the same reason. Confirming is
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// what writes it to the settings store; letting the countdown run leaves
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// nothing behind.
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//
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// Applied with `hyprctl eval` and hl.monitor{}. As everywhere else in Panama,
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// success means the value was read back from the compositor and matched, never
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// that a command exited zero.
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import Quickshell
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import Quickshell.Io
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import QtQuick
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import qs.config
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Singleton {
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id: root
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// [{ name, description, width, height, refreshRate, scale, transform,
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// modes: [{ label, mode, width, height, refresh }] }]
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property var monitors: []
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property string lastError: ""
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// Set while a change is applied but not yet confirmed.
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property string pendingOutput: ""
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property var pendingPrevious: null
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property var pendingRequested: null
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property bool pendingVerified: false
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property bool revertQueued: false
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property int secondsLeft: 0
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readonly property bool awaitingConfirmation: root.pendingOutput !== ""
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readonly property bool canConfirm: root.awaitingConfirmation
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&& root.pendingVerified
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&& !root.busy
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readonly property bool busy: query.running || applyRun.running || revertRun.running
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readonly property int confirmSeconds: 15
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readonly property var transforms: [
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{ value: 0, label: "Landscape" },
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{ value: 1, label: "Portrait" },
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{ value: 2, label: "Landscape (flipped)" },
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{ value: 3, label: "Portrait (flipped)" }
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]
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// Scales that divide this desktop's common resolutions into whole pixels.
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// Hyprland rejects a fractional scale that does not, and the message it
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// gives is not something to put in front of a user.
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readonly property var scales: [1.0, 1.25, 1.5, 1.75, 2.0, 2.5, 3.0]
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Process {
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id: query
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command: ["hyprctl", "-j", "monitors"]
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stdout: StdioCollector {
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onStreamFinished: root.parse(this.text)
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}
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onExited: (exitCode, exitStatus) => {
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if (exitCode !== 0)
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root.lastError = "Could not read the connected displays.";
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}
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}
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Process {
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id: applyRun
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onExited: (exitCode, exitStatus) => {
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if (!root.awaitingConfirmation)
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return;
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if (root.revertQueued) {
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root.performRevert();
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return;
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}
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if (exitCode !== 0) {
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root.revertWithMessage("The display rejected that change and Panama restored the previous setting.");
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return;
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}
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verifyTimer.attempts = 0;
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verifyTimer.restart();
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}
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}
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Process {
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id: revertRun
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onExited: (exitCode, exitStatus) => {
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if (exitCode !== 0)
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root.lastError = "The previous display setting could not be restored automatically.";
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root.refresh();
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}
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}
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Component.onCompleted: root.refresh()
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function refresh(): void {
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if (!query.running)
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query.running = true;
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}
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function parse(text: string): void {
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try {
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const raw = JSON.parse(text);
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root.monitors = raw.map(monitor => ({
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name: monitor.name ?? "",
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description: monitor.description ?? monitor.model ?? "Display",
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width: monitor.width ?? 0,
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height: monitor.height ?? 0,
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refreshRate: monitor.refreshRate ?? 0,
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scale: monitor.scale ?? 1,
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transform: monitor.transform ?? 0,
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modes: root.normaliseModes(monitor.availableModes ?? [])
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}));
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if (root.awaitingConfirmation && root.pendingRequested
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&& root.matchesRequest(root.monitorNamed(root.pendingOutput), root.pendingRequested)) {
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root.pendingVerified = true;
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verifyTimer.stop();
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root.lastError = "";
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} else if (!root.awaitingConfirmation && (
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root.lastError === "Could not read the connected displays."
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|| root.lastError === "The display list could not be read.")) {
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root.lastError = "";
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}
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} catch (error) {
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root.lastError = "The display list could not be read.";
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}
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}
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// "[email protected]" -> a sortable record. The compositor reports the same
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// resolution several times at refresh rates that differ only in rounding
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// (60.00 and 59.94), which as a list of buttons is noise rather than
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// choice, so equal rounded pairs collapse to one.
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function normaliseModes(raw: var): var {
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const seen = {};
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const out = [];
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for (const entry of raw) {
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const match = String(entry).match(/^(\d+)x(\d+)@([\d.]+)Hz$/);
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if (!match)
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continue;
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const width = Number(match[1]);
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const height = Number(match[2]);
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const refresh = Math.round(Number(match[3]));
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const key = `${width}x${height}@${refresh}`;
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if (seen[key])
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continue;
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seen[key] = true;
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out.push({
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label: `${width} × ${height}`,
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refreshLabel: `${refresh} Hz`,
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mode: key,
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width: width,
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height: height,
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refresh: refresh
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});
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}
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return out.sort((a, b) => (b.width * b.height) - (a.width * a.height) || b.refresh - a.refresh);
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}
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function monitorNamed(name: string): var {
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return root.monitors.find(monitor => monitor.name === name) ?? null;
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}
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function modeParts(mode: string): var {
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const match = String(mode).match(/^(\d+)x(\d+)@(\d+(?:\.\d+)?)$/);
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if (!match)
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return null;
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return {
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width: Number(match[1]),
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height: Number(match[2]),
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refresh: Number(match[3])
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};
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}
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function isScaleClean(mode: string, scale: real): bool {
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const parts = root.modeParts(mode);
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if (!parts || root.scales.indexOf(scale) < 0 || !Number.isFinite(scale) || scale <= 0)
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return false;
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const logicalWidth = parts.width / scale;
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const logicalHeight = parts.height / scale;
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return Math.abs(logicalWidth - Math.round(logicalWidth)) < 0.0001
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&& Math.abs(logicalHeight - Math.round(logicalHeight)) < 0.0001;
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}
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function scalesForMode(mode: string): var {
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return root.scales.filter(scale => root.isScaleClean(mode, scale));
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}
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function nearestCleanScale(mode: string, preferred: real): real {
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const choices = root.scalesForMode(mode);
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if (choices.length === 0)
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return 1.0;
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return choices.reduce((best, candidate) =>
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Math.abs(candidate - preferred) < Math.abs(best - preferred) ? candidate : best,
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choices[0]);
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}
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function matchesRequest(monitor: var, requested: var): bool {
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if (!monitor || !requested || monitor.name !== requested.output)
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return false;
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const parts = root.modeParts(requested.mode);
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return !!parts
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&& monitor.width === parts.width
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&& monitor.height === parts.height
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&& Math.abs(monitor.refreshRate - parts.refresh) < 0.6
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&& Math.abs(monitor.scale - requested.scale) < 0.001
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&& monitor.transform === requested.transform;
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}
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// Applies immediately and starts the countdown. Nothing is stored yet: the
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// settings file is only written by confirm().
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function apply(output: string, mode: string, scale: real, transform: int): bool {
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if (root.awaitingConfirmation) {
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root.lastError = "Finish the current display change first.";
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return false;
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}
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const monitor = root.monitorNamed(output);
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if (!monitor) {
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root.lastError = "That display is not connected.";
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return false;
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}
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if (!monitor.modes.some(candidate => candidate.mode === mode)) {
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root.lastError = "That display does not offer that mode.";
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return false;
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}
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if (!root.isScaleClean(mode, scale)) {
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root.lastError = "That scale does not divide this resolution cleanly.";
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return false;
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}
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if (!root.transforms.some(candidate => candidate.value === transform)) {
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root.lastError = "That rotation is not one Panama offers.";
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return false;
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}
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root.pendingPrevious = {
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output: output,
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mode: `${monitor.width}x${monitor.height}@${Math.round(monitor.refreshRate)}`,
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scale: monitor.scale,
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transform: monitor.transform
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};
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root.pendingRequested = {
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output: output,
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mode: mode,
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scale: scale,
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transform: transform
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};
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root.pendingOutput = output;
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root.pendingVerified = false;
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root.revertQueued = false;
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root.secondsLeft = root.confirmSeconds;
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root.lastError = "";
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countdown.restart();
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root.push(output, mode, scale, transform);
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return true;
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}
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function push(output: string, mode: string, scale: real, transform: int): void {
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// Values are validated above and the output name comes from the
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// compositor's own list, so nothing user-authored reaches the payload.
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applyRun.exec(["hyprctl", "eval",
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`hl.monitor({ output = "${output}", mode = "${mode}", scale = ${scale}, transform = ${transform} })`]);
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}
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function confirm(): bool {
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if (!root.canConfirm || !root.matchesRequest(
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root.monitorNamed(root.pendingOutput), root.pendingRequested)) {
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if (root.awaitingConfirmation)
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root.lastError = "Wait for the display to finish applying before keeping it.";
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return false;
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}
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const stored = DesktopPreferences.get("displays");
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const next = Object.assign({}, (stored && typeof stored === "object") ? stored : {});
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next[root.pendingOutput] = {
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mode: root.pendingRequested.mode,
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scale: root.pendingRequested.scale,
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transform: root.pendingRequested.transform
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};
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if (!DesktopPreferences.set("displays", next)) {
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root.lastError = "That display setting could not be saved. Revert it and try again.";
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return false;
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}
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root.clearPending();
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root.lastError = "";
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return true;
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}
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function clearPending(): void {
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countdown.stop();
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verifyTimer.stop();
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root.pendingOutput = "";
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root.pendingPrevious = null;
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root.pendingRequested = null;
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root.pendingVerified = false;
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root.revertQueued = false;
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root.secondsLeft = 0;
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}
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function revert(): void {
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root.revertWithMessage("");
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}
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function revertWithMessage(message: string): void {
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if (!root.awaitingConfirmation)
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return;
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countdown.stop();
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verifyTimer.stop();
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root.pendingVerified = false;
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if (message !== "")
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root.lastError = message;
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if (applyRun.running) {
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root.revertQueued = true;
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return;
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}
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root.performRevert();
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}
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function performRevert(): void {
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const previous = root.pendingPrevious;
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root.clearPending();
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if (previous) {
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revertRun.exec(["hyprctl", "eval",
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`hl.monitor({ output = "${previous.output}", mode = "${previous.mode}", scale = ${previous.scale}, transform = ${previous.transform} })`]);
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}
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}
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// Clears any stored override for an output so it returns to the value
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// shipped in hypr/monitors.lua on the next start.
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function forget(output: string): void {
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const stored = DesktopPreferences.get("displays");
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if (!stored || typeof stored !== "object" || stored[output] === undefined)
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return;
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const next = Object.assign({}, stored);
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delete next[output];
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DesktopPreferences.set("displays", next);
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}
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function isOverridden(output: string): bool {
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const stored = DesktopPreferences.get("displays");
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return !!(stored && typeof stored === "object" && stored[output] !== undefined);
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}
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Timer {
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id: verifyTimer
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property int attempts: 0
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interval: 120
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repeat: true
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onTriggered: {
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attempts++;
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if (attempts > 25) {
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root.revertWithMessage("The display did not apply that setting, so Panama restored the previous one.");
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return;
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}
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root.refresh();
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}
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}
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Timer {
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id: countdown
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interval: 1000
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repeat: true
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onTriggered: {
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root.secondsLeft -= 1;
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if (root.secondsLeft <= 0)
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root.revert();
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}
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}
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}
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