Hand out hotkey bindings as a snapshot
Hotkeys.all() returned its synchronised list, and every reader had to lock it while iterating: a lock owned by one class and taken by four others. It now returns a copy, and the lock stays inside Hotkeys. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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@@ -88,22 +88,20 @@ public final class HotkeyEngine implements GlobalInputHook.Listener {
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return;
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}
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synchronized (hotkeys.all()) {
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for (Hotkey h : hotkeys.all()) {
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if (!h.enabled || !h.isValid() || !h.action.supported()) continue;
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if (!h.combo.contains(key)) continue;
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for (Hotkey h : hotkeys.all()) {
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if (!h.enabled || !h.isValid() || !h.action.supported()) continue;
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if (!h.combo.contains(key)) continue;
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boolean satisfied = h.combo.isSatisfiedBy(pressed);
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if (satisfied && active.add(h)) {
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if (h.action.momentary() || h.trigger == Hotkey.Trigger.KEY_DOWN) {
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fired.add(() -> handler.onHotkey(h, true));
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}
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} else if (!satisfied && active.remove(h)) {
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if (h.action.momentary()) {
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fired.add(() -> handler.onHotkey(h, false));
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} else if (h.trigger == Hotkey.Trigger.KEY_UP) {
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fired.add(() -> handler.onHotkey(h, true));
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}
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boolean satisfied = h.combo.isSatisfiedBy(pressed);
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if (satisfied && active.add(h)) {
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if (h.action.momentary() || h.trigger == Hotkey.Trigger.KEY_DOWN) {
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fired.add(() -> handler.onHotkey(h, true));
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}
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} else if (!satisfied && active.remove(h)) {
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if (h.action.momentary()) {
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fired.add(() -> handler.onHotkey(h, false));
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} else if (h.trigger == Hotkey.Trigger.KEY_UP) {
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fired.add(() -> handler.onHotkey(h, true));
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}
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}
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}
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@@ -22,9 +22,11 @@ public final class Hotkeys {
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private final List<Hotkey> entries = Collections.synchronizedList(new ArrayList<>());
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/** Live view; iterate under {@code synchronized (all())} when the engine may be running. */
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/** The bindings as they are now; later changes do not show up in the returned list. */
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public List<Hotkey> all() {
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return entries;
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synchronized (entries) {
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return List.copyOf(entries);
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}
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}
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public void add(Hotkey hotkey) {
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@@ -70,10 +70,8 @@ final class HotkeyService {
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/** The binding for an action with no argument, or {@code null} when unbound. */
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Hotkey find(HotkeyAction action) {
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synchronized (hotkeys.all()) {
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for (Hotkey h : hotkeys.all()) {
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if (h.action == action) return h;
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}
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for (Hotkey h : hotkeys.all()) {
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if (h.action == action) return h;
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}
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return null;
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}
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@@ -39,9 +39,7 @@ final class HotkeysPanel extends JPanel {
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this.service = service;
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setBorder(new ScaledEmptyBorder(8, 8, 8, 8));
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synchronized (service.all()) {
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for (Hotkey h : service.all()) working.add(h.copy());
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}
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for (Hotkey h : service.all()) working.add(h.copy());
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table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
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table.setRowHeight(table.getRowHeight() + UIScale.scale(4));
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@@ -113,9 +111,7 @@ final class HotkeysPanel extends JPanel {
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/** Picks the stored bindings up again after something else changed them. */
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void reload() {
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working.clear();
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synchronized (service.all()) {
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for (Hotkey h : service.all()) working.add(h.copy());
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}
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for (Hotkey h : service.all()) working.add(h.copy());
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model.fireTableDataChanged();
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}
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@@ -325,10 +325,8 @@ final class VoiceActivationPanel extends FormPanel {
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dlg.setVisible(true);
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if (!dlg.isConfirmed()) return;
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List<Hotkey> updated = new java.util.ArrayList<>();
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synchronized (hotkeys.all()) {
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for (Hotkey h : hotkeys.all()) {
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if (h != existing) updated.add(h.copy());
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}
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for (Hotkey h : hotkeys.all()) {
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if (h != existing) updated.add(h.copy());
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}
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updated.add(dlg.result());
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hotkeys.replaceAll(updated);
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