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IpcMain.cs
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namespace ElectronNET.API
{
using System;
using System.Diagnostics;
using System.Linq;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Threading.Tasks;
using ElectronNET.Serialization;
/// <summary>
/// Communicate asynchronously from the main process to renderer processes.
/// </summary>
public sealed class IpcMain
{
private static IpcMain _ipcMain;
private static object _syncRoot = new object();
private static readonly JsonSerializerOptions BoxedObjectSerializationOptions = new JsonSerializerOptions
{
PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
WriteIndented = false,
Converters =
{
new JsonStringEnumConverter(JsonNamingPolicy.CamelCase),
new JsonToBoxedPrimitivesConverter(),
}
};
internal IpcMain()
{
}
internal static IpcMain Instance
{
get
{
if (_ipcMain == null)
{
lock (_syncRoot)
{
if (_ipcMain == null)
{
_ipcMain = new IpcMain();
}
}
}
return _ipcMain;
}
}
/// <summary>
/// Listens to channel, when a new message arrives listener would be called with
/// listener(event, args...).
/// </summary>
/// <param name="channel">Channelname.</param>
/// <param name="listener">Callback Method.</param>
public async Task On(string channel, Action<object> listener)
{
await BridgeConnector.Socket.Emit("registerIpcMainChannel", channel).ConfigureAwait(false);
BridgeConnector.Socket.Off(channel);
BridgeConnector.Socket.On<JsonElement>(channel, (args) =>
{
var arg = FormatArguments(args);
listener(arg);
});
}
private static object FormatArguments(JsonElement args)
{
var objectArray = args.Deserialize<object[]>(BoxedObjectSerializationOptions).ToList();
Debug.Assert(objectArray.Count <= 2);
if (objectArray.Count == 2)
{
return objectArray[1];
}
return null;
}
/// <summary>
/// Send a message to the renderer process synchronously via channel,
/// you can also send arbitrary arguments.
///
/// Note: Sending a synchronous message will block the whole renderer process,
/// unless you know what you are doing you should never use it.
/// </summary>
/// <param name="channel"></param>
/// <param name="listener"></param>
public void OnSync(string channel, Func<object, object> listener)
{
BridgeConnector.Socket.Emit("registerSyncIpcMainChannel", channel);
BridgeConnector.Socket.On<JsonElement>(channel, (args) =>
{
var arg = FormatArguments(args);
var result = listener(arg);
BridgeConnector.Socket.Emit(channel + "Sync", result);
});
}
/// <summary>
/// Send a message to the renderer process synchronously via channel,
/// you can also send arbitrary arguments.
///
/// Note: Sending a synchronous message will block the whole renderer process,
/// unless you know what you are doing you should never use it.
/// </summary>
/// <param name="channel"></param>
/// <param name="listener"></param>
public void OnSync(string channel, Func<object, Task<object>> listener)
{
BridgeConnector.Socket.Emit("registerSyncIpcMainChannel", channel);
BridgeConnector.Socket.On<JsonElement>(channel, (args) =>
{
Task.Run(async () =>
{
var arg = FormatArguments(args);
var result = await listener(arg);
BridgeConnector.Socket.Emit(channel + "Sync", result);
});
});
}
/// <summary>
/// Adds a one time listener method for the event. This listener is invoked only
/// the next time a message is sent to channel, after which it is removed.
/// </summary>
/// <param name="channel">Channelname.</param>
/// <param name="listener">Callback Method.</param>
public void Once(string channel, Action<object> listener)
{
BridgeConnector.Socket.Emit("registerOnceIpcMainChannel", channel);
BridgeConnector.Socket.Once<JsonElement>(channel, (args) =>
{
var arg = FormatArguments(args);
listener(arg);
});
}
/// <summary>
/// Removes listeners of the specified channel.
/// </summary>
/// <param name="channel">Channelname.</param>
public void RemoveAllListeners(string channel)
{
BridgeConnector.Socket.Emit("removeAllListenersIpcMainChannel", channel);
}
/// <summary>
/// Send a message to the renderer process asynchronously via channel, you can also send
/// arbitrary arguments. Arguments will be serialized in JSON internally and hence
/// no functions or prototype chain will be included. The renderer process handles it by
/// listening for channel with ipcRenderer module.
/// </summary>
/// <param name="browserWindow">BrowserWindow with channel.</param>
/// <param name="channel">Channelname.</param>
/// <param name="data">Arguments data.</param>
public void Send(BrowserWindow browserWindow, string channel, params object[] data)
{
BridgeConnector.Socket.Emit("sendToIpcRenderer", browserWindow, channel, data);
}
/// <summary>
/// Send a message to the BrowserView renderer process asynchronously via channel, you can also send
/// arbitrary arguments. Arguments will be serialized in JSON internally and hence
/// no functions or prototype chain will be included. The renderer process handles it by
/// listening for channel with ipcRenderer module.
/// </summary>
/// <param name="browserView">BrowserView with channel.</param>
/// <param name="channel">Channelname.</param>
/// <param name="data">Arguments data.</param>
public void Send(BrowserView browserView, string channel, params object[] data)
{
BridgeConnector.Socket.Emit("sendToIpcRendererBrowserView", browserView.Id, channel, data);
}
/// <summary>
/// Adds a handler for an invokeable IPC. This handler will be called
/// whenever a renderer calls ipcRenderer.invoke(channel, ...args).
/// </summary>
/// <param name="channel">Channelname.</param>
/// <param name="listener">Callback Method.</param>
public void Handle(string channel, Func<object, object> listener)
{
BridgeConnector.Socket.Emit("registerHandleIpcMainChannel", channel);
BridgeConnector.Socket.On<JsonElement>(channel, (args) =>
{
var arg = FormatArguments(args);
var result = listener(arg);
BridgeConnector.Socket.Emit(channel + "Handle", result);
});
}
/// <summary>
/// Adds a handler for an invokeable IPC. This handler will be called
/// whenever a renderer calls ipcRenderer.invoke(channel, ...args).
/// </summary>
/// <param name="channel">Channelname.</param>
/// <param name="listener">Callback Method.</param>
public void Handle(string channel, Func<object, Task<object>> listener)
{
BridgeConnector.Socket.Emit("registerHandleIpcMainChannel", channel);
BridgeConnector.Socket.On<JsonElement>(channel, (args) =>
{
Task.Run(async () =>
{
var arg = FormatArguments(args);
var result = await listener(arg);
BridgeConnector.Socket.Emit(channel + "Handle", result);
});
});
}
/// <summary>
/// Handles a single invokeable IPC message, then removes the listener.
/// See ipcMain.handle(channel, listener).
/// </summary>
/// <param name="channel">Channelname.</param>
/// <param name="listener">Callback Method.</param>
public void HandleOnce(string channel, Func<object, object> listener)
{
BridgeConnector.Socket.Emit("registerHandleOnceIpcMainChannel", channel);
BridgeConnector.Socket.Once<JsonElement>(channel, (args) =>
{
var arg = FormatArguments(args);
var result = listener(arg);
BridgeConnector.Socket.Emit(channel + "HandleOnce", result);
});
}
/// <summary>
/// Handles a single invokeable IPC message, then removes the listener.
/// See ipcMain.handle(channel, listener).
/// </summary>
/// <param name="channel">Channelname.</param>
/// <param name="listener">Callback Method.</param>
public void HandleOnce(string channel, Func<object, Task<object>> listener)
{
BridgeConnector.Socket.Emit("registerHandleOnceIpcMainChannel", channel);
BridgeConnector.Socket.Once<JsonElement>(channel, (args) =>
{
Task.Run(async () =>
{
var arg = FormatArguments(args);
var result = await listener(arg);
BridgeConnector.Socket.Emit(channel + "HandleOnce", result);
});
});
}
/// <summary>
/// Removes any handler for channel, if present.
/// </summary>
/// <param name="channel">Channelname.</param>
public void RemoveHandler(string channel)
{
BridgeConnector.Socket.Emit("removeHandlerIpcMainChannel", channel);
}
}
}