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GlobalShortcut.cs
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102 lines (89 loc) · 3.38 KB
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using System;
using System.Collections.Generic;
using System.Text.Json;
using System.Threading.Tasks;
namespace ElectronNET.API
{
/// <summary>
/// Detect keyboard events when the application does not have keyboard focus.
/// </summary>
public sealed class GlobalShortcut
{
private static GlobalShortcut _globalShortcut;
private static object _syncRoot = new object();
internal GlobalShortcut()
{
}
internal static GlobalShortcut Instance
{
get
{
if (_globalShortcut == null)
{
lock (_syncRoot)
{
if (_globalShortcut == null)
{
_globalShortcut = new GlobalShortcut();
}
}
}
return _globalShortcut;
}
}
private Dictionary<string, Action> _shortcuts = new Dictionary<string, Action>();
/// <summary>
/// Registers a global shortcut of accelerator.
/// The callback is called when the registered shortcut is pressed by the user.
///
/// When the accelerator is already taken by other applications, this call will
/// silently fail.This behavior is intended by operating systems, since they don’t
/// want applications to fight for global shortcuts.
/// </summary>
public void Register(string accelerator, Action function)
{
if (!_shortcuts.ContainsKey(accelerator))
{
_shortcuts.Add(accelerator, function);
BridgeConnector.Socket.Off("globalShortcut-pressed");
BridgeConnector.Socket.On<string>("globalShortcut-pressed", (shortcut) =>
{
if (_shortcuts.TryGetValue(shortcut, out var action))
{
action();
}
});
BridgeConnector.Socket.Emit("globalShortcut-register", accelerator);
}
}
/// <summary>
/// When the accelerator is already taken by other applications,
/// this call will still return false. This behavior is intended by operating systems,
/// since they don’t want applications to fight for global shortcuts.
/// </summary>
/// <returns>Whether this application has registered accelerator.</returns>
public Task<bool> IsRegisteredAsync(string accelerator)
{
var tcs = new TaskCompletionSource<bool>();
BridgeConnector.Socket.Once<bool>("globalShortcut-isRegisteredCompleted", tcs.SetResult);
BridgeConnector.Socket.Emit("globalShortcut-isRegistered", accelerator);
return tcs.Task;
}
/// <summary>
/// Unregisters the global shortcut of accelerator.
/// </summary>
public void Unregister(string accelerator)
{
_shortcuts.Remove(accelerator);
BridgeConnector.Socket.Emit("globalShortcut-unregister", accelerator);
}
/// <summary>
/// Unregisters all of the global shortcuts.
/// </summary>
public void UnregisterAll()
{
_shortcuts.Clear();
BridgeConnector.Socket.Emit("globalShortcut-unregisterAll");
}
}
}