Drop key auto-repeat in the lock screen password field

shell/plugins/lock/LockView.qml

@@ -60,6 +60,14 @@ Item {
     passwordTextEdited("")
   }
 
+  // Waking a DPMS-blanked display can stall the compositor for seconds while
+  // the monitor modesets, so the wake key's release arrives late and client-side
+  // key repeat floods the field with that character. A held key has no business
+  // typing a password; only holding Backspace/Delete to clear stays useful.
+  function dropsAutoRepeat(key) {
+    return key !== Qt.Key_Backspace && key !== Qt.Key_Delete
+  }
+
   function syncPasswordText() {
     if (passwordInput.text === passwordText) return
     syncingPasswordText = true
@@ -176,6 +184,10 @@ Item {
 
         Keys.onPressed: function(event) {
           root.wakeRequested()
+          if (event.isAutoRepeat && root.dropsAutoRepeat(event.key)) {
+            event.accepted = true
+            return
+          }
           if (event.key === Qt.Key_Escape || (event.modifiers & Qt.ControlModifier && event.key === Qt.Key_U)) {
             root.passwordTextEdited("")
             event.accepted = true

test/shell.d/fixtures/lock-autorepeat/shell.qml

@@ -0,0 +1,73 @@
+import QtQuick
+import Quickshell
+import qs.Commons
+
+ShellRoot {
+  id: root
+
+  readonly property string resultPath: Quickshell.env("OMARCHY_QML_TEST_RESULT")
+  readonly property string rootPath: Quickshell.env("OMARCHY_PATH")
+  property var failures: []
+
+  function fail(message) {
+    failures.push(String(message))
+  }
+
+  function assertTrue(condition, message) {
+    if (!condition) fail(message)
+  }
+
+  function shellQuote(value) {
+    return "'" + String(value).replace(/'/g, "'\\''") + "'"
+  }
+
+  function writeResult() {
+    var payload = JSON.stringify({
+      ok: failures.length === 0,
+      failures: failures
+    })
+
+    if (resultPath) {
+      Quickshell.execDetached(["bash", "-lc", "printf '%s' " + shellQuote(payload) + " > " + shellQuote(resultPath)])
+    }
+  }
+
+  Item { id: host; width: 800; height: 600 }
+
+  Timer {
+    interval: 1
+    running: true
+    repeat: false
+    onTriggered: {
+      try {
+        var component = Qt.createComponent("file://" + root.rootPath + "/shell/plugins/lock/LockView.qml", Component.PreferSynchronous)
+        if (component.status !== Component.Ready) {
+          root.fail("LockView failed to load: " + component.errorString())
+          return
+        }
+
+        var view = component.createObject(host, { width: 800, height: 600, loadBackground: false })
+        if (!view) {
+          root.fail("LockView failed to instantiate: " + component.errorString())
+          return
+        }
+
+        var dropped = [Qt.Key_A, Qt.Key_Z, Qt.Key_0, Qt.Key_Space, Qt.Key_Return, Qt.Key_Enter, Qt.Key_Escape]
+        for (var i = 0; i < dropped.length; i++) {
+          root.assertTrue(view.dropsAutoRepeat(dropped[i]), "auto-repeat of key " + dropped[i] + " is dropped")
+        }
+
+        var kept = [Qt.Key_Backspace, Qt.Key_Delete]
+        for (var j = 0; j < kept.length; j++) {
+          root.assertTrue(!view.dropsAutoRepeat(kept[j]), "auto-repeat of key " + kept[j] + " still edits the field")
+        }
+
+        view.destroy()
+      } catch (error) {
+        root.fail("lock autorepeat fixture threw: " + error)
+      } finally {
+        root.writeResult()
+      }
+    }
+  }
+}

test/shell.d/lock-autorepeat-test.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+set -euo pipefail
+
+source "$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)/base-test.sh"
+
+TMPDIR=""
+QS_PID=""
+
+cleanup() {
+  if [[ -n $QS_PID ]] && kill -0 "$QS_PID" 2>/dev/null; then
+    kill "$QS_PID" 2>/dev/null || true
+    wait "$QS_PID" 2>/dev/null || true
+  fi
+  if [[ -n $TMPDIR && -d $TMPDIR ]]; then
+    rm -rf "$TMPDIR"
+  fi
+}
+trap cleanup EXIT
+
+require_compositor "lock autorepeat test"
+
+if ! command -v quickshell >/dev/null 2>&1; then
+  pass "quickshell not installed; skipping lock autorepeat test"
+  exit 0
+fi
+
+require_command jq
+
+TMPDIR=$(mktemp -d)
+result="$TMPDIR/result.json"
+log="$TMPDIR/quickshell.log"
+config_dir="$TMPDIR/lock-autorepeat"
+mkdir -p "$config_dir" "$TMPDIR/home"
+cp "$SHELL_TEST_DIR/fixtures/lock-autorepeat/shell.qml" "$config_dir/shell.qml"
+ln -s "$ROOT/shell/Ui" "$config_dir/Ui"
+ln -s "$ROOT/shell/Commons" "$config_dir/Commons"
+
+OMARCHY_PATH="$ROOT" \
+OMARCHY_QML_TEST_RESULT="$result" \
+HOME="$TMPDIR/home" \
+XDG_CONFIG_HOME="$TMPDIR/home/.config" \
+XDG_CACHE_HOME="$TMPDIR/home/.cache" \
+XDG_STATE_HOME="$TMPDIR/home/.local/state" \
+QML2_IMPORT_PATH="$ROOT/shell${QML2_IMPORT_PATH:+:$QML2_IMPORT_PATH}" \
+QML_IMPORT_PATH="$ROOT/shell${QML_IMPORT_PATH:+:$QML_IMPORT_PATH}" \
+PATH="$ROOT/bin:$PATH" \
+  quickshell -p "$config_dir" --no-color >"$log" 2>&1 &
+QS_PID=$!
+
+for _ in {1..80}; do
+  [[ -s $result ]] && break
+  if ! kill -0 "$QS_PID" 2>/dev/null; then
+    sed -n '1,220p' "$log" >&2
+    fail "lock autorepeat quickshell exited before writing result"
+  fi
+  sleep 0.1
+done
+
+[[ -s $result ]] || {
+  sed -n '1,220p' "$log" >&2
+  fail "lock autorepeat test timed out"
+}
+
+if ! jq -e '.ok == true' "$result" >/dev/null; then
+  printf 'Lock autorepeat result:\n' >&2
+  jq . "$result" >&2
+  printf 'Lock autorepeat log:\n' >&2
+  sed -n '1,220p' "$log" >&2
+  fail "lock password field drops auto-repeat except Backspace/Delete"
+fi
+
+pass "lock password field drops auto-repeat except Backspace/Delete"