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using ElectronNET.API.Entities;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json.Serialization;
using System;
using System.Threading.Tasks;
namespace ElectronNET.API
{
/// <summary>
/// Retrieve information about screen size, displays, cursor position, etc.
/// </summary>
public sealed class Screen
{
/// <summary>
/// Emitted when an new Display has been added.
/// </summary>
public event Action<Display> OnDisplayAdded
{
add
{
if (_onDisplayAdded == null)
{
BridgeConnector.Socket.On("screen-display-added-event" + GetHashCode(), (display) =>
{
_onDisplayAdded(((JObject)display).ToObject<Display>());
});
BridgeConnector.Socket.Emit("register-screen-display-added", GetHashCode());
}
_onDisplayAdded += value;
}
remove
{
_onDisplayAdded -= value;
if (_onDisplayAdded == null)
BridgeConnector.Socket.Off("screen-display-added-event" + GetHashCode());
}
}
private event Action<Display> _onDisplayAdded;
/// <summary>
/// Emitted when oldDisplay has been removed.
/// </summary>
public event Action<Display> OnDisplayRemoved
{
add
{
if (_onDisplayRemoved == null)
{
BridgeConnector.Socket.On("screen-display-removed-event" + GetHashCode(), (display) =>
{
_onDisplayRemoved(((JObject)display).ToObject<Display>());
});
BridgeConnector.Socket.Emit("register-screen-display-removed", GetHashCode());
}
_onDisplayRemoved += value;
}
remove
{
_onDisplayRemoved -= value;
if (_onDisplayRemoved == null)
BridgeConnector.Socket.Off("screen-display-removed-event" + GetHashCode());
}
}
private event Action<Display> _onDisplayRemoved;
/// <summary>
/// Emitted when one or more metrics change in a display.
/// The changedMetrics is an array of strings that describe the changes.
/// Possible changes are bounds, workArea, scaleFactor and rotation.
/// </summary>
public event Action<Display, string[]> OnDisplayMetricsChanged
{
add
{
if (_onDisplayMetricsChanged == null)
{
BridgeConnector.Socket.On("screen-display-metrics-changed-event" + GetHashCode(), (args) =>
{
var display = ((JArray)args).First.ToObject<Display>();
var metrics = ((JArray)args).Last.ToObject<string[]>();
_onDisplayMetricsChanged(display, metrics);
});
BridgeConnector.Socket.Emit("register-screen-display-metrics-changed", GetHashCode());
}
_onDisplayMetricsChanged += value;
}
remove
{
_onDisplayMetricsChanged -= value;
if (_onDisplayMetricsChanged == null)
BridgeConnector.Socket.Off("screen-display-metrics-changed-event" + GetHashCode());
}
}
private event Action<Display, string[]> _onDisplayMetricsChanged;
private static Screen _screen;
private static object _syncRoot = new object();
internal Screen() { }
internal static Screen Instance
{
get
{
if (_screen == null)
{
lock (_syncRoot)
{
if (_screen == null)
{
_screen = new Screen();
}
}
}
return _screen;
}
}
/// <summary>
/// The current absolute position of the mouse pointer.
/// </summary>
/// <returns></returns>
public Task<Point> GetCursorScreenPointAsync()
{
var taskCompletionSource = new TaskCompletionSource<Point>();
BridgeConnector.Socket.On("screen-getCursorScreenPointCompleted", (point) =>
{
BridgeConnector.Socket.Off("screen-getCursorScreenPointCompleted");
taskCompletionSource.SetResult(((JObject)point).ToObject<Point>());
});
BridgeConnector.Socket.Emit("screen-getCursorScreenPoint");
return taskCompletionSource.Task;
}
/// <summary>
/// macOS: The height of the menu bar in pixels.
/// </summary>
/// <returns>The height of the menu bar in pixels.</returns>
public Task<int> GetMenuBarHeightAsync()
{
var taskCompletionSource = new TaskCompletionSource<int>();
BridgeConnector.Socket.On("screen-getMenuBarHeightCompleted", (height) =>
{
BridgeConnector.Socket.Off("screen-getMenuBarHeightCompleted");
taskCompletionSource.SetResult(int.Parse(height.ToString()));
});
BridgeConnector.Socket.Emit("screen-getMenuBarHeight");
return taskCompletionSource.Task;
}
/// <summary>
/// The primary display.
/// </summary>
/// <returns></returns>
public Task<Display> GetPrimaryDisplayAsync()
{
var taskCompletionSource = new TaskCompletionSource<Display>();
BridgeConnector.Socket.On("screen-getPrimaryDisplayCompleted", (display) =>
{
BridgeConnector.Socket.Off("screen-getPrimaryDisplayCompleted");
taskCompletionSource.SetResult(((JObject)display).ToObject<Display>());
});
BridgeConnector.Socket.Emit("screen-getPrimaryDisplay");
return taskCompletionSource.Task;
}
/// <summary>
/// An array of displays that are currently available.
/// </summary>
/// <returns>An array of displays that are currently available.</returns>
public Task<Display[]> GetAllDisplaysAsync()
{
var taskCompletionSource = new TaskCompletionSource<Display[]>();
BridgeConnector.Socket.On("screen-getAllDisplaysCompleted", (displays) =>
{
BridgeConnector.Socket.Off("screen-getAllDisplaysCompleted");
taskCompletionSource.SetResult(((JArray)displays).ToObject<Display[]>());
});
BridgeConnector.Socket.Emit("screen-getAllDisplays");
return taskCompletionSource.Task;
}
/// <summary>
/// The display nearest the specified point.
/// </summary>
/// <returns>The display nearest the specified point.</returns>
public Task<Display> GetDisplayNearestPointAsync(Point point)
{
var taskCompletionSource = new TaskCompletionSource<Display>();
BridgeConnector.Socket.On("screen-getDisplayNearestPointCompleted", (display) =>
{
BridgeConnector.Socket.Off("screen-getDisplayNearestPointCompleted");
taskCompletionSource.SetResult(((JObject)display).ToObject<Display>());
});
BridgeConnector.Socket.Emit("screen-getDisplayNearestPoint", JObject.FromObject(point, _jsonSerializer));
return taskCompletionSource.Task;
}
/// <summary>
/// The display that most closely intersects the provided bounds.
/// </summary>
/// <param name="rectangle"></param>
/// <returns>The display that most closely intersects the provided bounds.</returns>
public Task<Display> GetDisplayMatchingAsync(Rectangle rectangle)
{
var taskCompletionSource = new TaskCompletionSource<Display>();
BridgeConnector.Socket.On("screen-getDisplayMatching", (display) =>
{
BridgeConnector.Socket.Off("screen-getDisplayMatching");
taskCompletionSource.SetResult(((JObject)display).ToObject<Display>());
});
BridgeConnector.Socket.Emit("screen-getDisplayMatching", JObject.FromObject(rectangle, _jsonSerializer));
return taskCompletionSource.Task;
}
private JsonSerializer _jsonSerializer = new JsonSerializer()
{
ContractResolver = new CamelCasePropertyNamesContractResolver(),
NullValueHandling = NullValueHandling.Ignore,
DefaultValueHandling = DefaultValueHandling.Ignore
};
}
}