private async void ScriptCallback(IntPtr manager, IntPtr jsResult, IntPtr userdata)
{
if (EnableScriptInterface)
{
IntPtr value = WebKit.JavaScript.GetValue(jsResult);
if (WebKit.JavaScript.IsValueString(value))
{
IntPtr bytes = IntPtr.Zero;
try
{
bytes = WebKit.JavaScript.GetStringBytes(value);
IntPtr bytesPtr = GLib.GetBytesDataPointer(bytes, out UIntPtr length);
string result;
unsafe { result = Encoding.UTF8.GetString((byte *)bytesPtr, (int)length); }
await bridge.HandleScriptCall(result);
}
finally { if (bytes != IntPtr.Zero)
{
GLib.UnrefBytes(bytes);
}
}
}
}
}
public Task <string> ExecuteScriptAsync(string script)
{
var taskResult = new TaskCompletionSource <string>();
unsafe void Callback(IntPtr webview, IntPtr asyncResult, IntPtr userdata)
{
IntPtr jsResult = IntPtr.Zero;
try
{
jsResult = WebKit.JavaScript.EndExecute(webview, asyncResult, out IntPtr errorPtr);
if (jsResult != IntPtr.Zero)
{
IntPtr value = WebKit.JavaScript.GetValue(jsResult);
if (WebKit.JavaScript.IsValueString(value))
{
IntPtr bytes = WebKit.JavaScript.GetStringBytes(value);
IntPtr bytesPtr = GLib.GetBytesDataPointer(bytes, out UIntPtr length);
string result = Encoding.UTF8.GetString((byte *)bytesPtr, (int)length);
taskResult.TrySetResult(result);
GLib.UnrefBytes(bytes);
}
else
{
taskResult.TrySetResult(null);
}
}
else
{
try
{
var error = Marshal.PtrToStructure <GError>(errorPtr);
string errorMessage = GLibString.FromPointer(error.Message);
taskResult.TrySetException(new Exception($"Script execution failed with: \"{errorMessage}\""));
}
catch (Exception ex) { taskResult.TrySetException(ex); }
finally { GLib.FreeError(errorPtr); }
}
}
catch (Exception ex) { taskResult.TrySetException(ex); }
finally
{
if (jsResult != IntPtr.Zero)
{
WebKit.JavaScript.ReleaseJsResult(jsResult);
}
}
}
using (GLibString gfunction = script)
{
WebKit.JavaScript.BeginExecute(Handle, gfunction, IntPtr.Zero, Callback, IntPtr.Zero);
}
return(taskResult.Task);
}
private unsafe void ScriptExecuteCallback(IntPtr webview, IntPtr asyncResult, IntPtr userdata)
{
var handle = GCHandle.FromIntPtr(userdata);
var state = (ScriptExecuteState)handle.Target !;
IntPtr jsResult = IntPtr.Zero;
try
{
jsResult = WebKit.JavaScript.EndExecute(webview, asyncResult, out IntPtr errorPtr);
if (jsResult != IntPtr.Zero)
{
IntPtr value = WebKit.JavaScript.GetValue(jsResult);
if (WebKit.JavaScript.IsValueString(value))
{
IntPtr bytes = WebKit.JavaScript.GetStringBytes(value);
IntPtr bytesPtr = GLib.GetBytesDataPointer(bytes, out UIntPtr length);
string result = Encoding.UTF8.GetString((byte *)bytesPtr, (int)length);
state.TaskResult.TrySetResult(result);
GLib.UnrefBytes(bytes);
}
else
{
state.TaskResult.TrySetResult(null);
}
}
else
{
try
{
var error = Marshal.PtrToStructure <GError>(errorPtr);
string?errorMessage = GLibString.FromPointer(error.Message);
state.TaskResult.TrySetException(new ScriptException($"Script execution failed with: \"{errorMessage}\""));
}
catch (Exception ex) { state.TaskResult.TrySetException(ex); }
finally { GLib.FreeError(errorPtr); }
}
}
catch (Exception ex) { state.TaskResult.TrySetException(ex); }
finally
{
handle.Free();
if (jsResult != IntPtr.Zero)
{
WebKit.JavaScript.ReleaseJsResult(jsResult);
}
}
}
private string ExecuteScriptCallback(IntPtr webview, IntPtr asyncResult, IntPtr userdata)
{
IntPtr jsResult = IntPtr.Zero;
try
{
jsResult = WebKit.JavaScript.EndExecute(webview, asyncResult, out IntPtr errorPtr);
if (jsResult != IntPtr.Zero)
{
IntPtr value = WebKit.JavaScript.GetValue(jsResult);
if (WebKit.JavaScript.IsValueString(value))
{
IntPtr bytes = WebKit.JavaScript.GetStringBytes(value);
IntPtr bytesPtr = GLib.GetBytesDataPointer(bytes, out UIntPtr length);
unsafe
{
string result = Encoding.UTF8.GetString((byte *)bytesPtr, (int)length);
GLib.UnrefBytes(bytes);
return(result);
}
}
else
{
return(null);
}
}
else
{
try
{
var error = Marshal.PtrToStructure <GError>(errorPtr);
string errorMessage = GLibString.FromPointer(error.Message);
throw new Exception($"Script execution failed with: \"{errorMessage}\"");
}
finally { GLib.FreeError(errorPtr); }
}
}
finally
{
if (jsResult != IntPtr.Zero)
{
WebKit.JavaScript.ReleaseJsResult(jsResult);
}
}
}