/// <summary>
/// Returns the value for the preference with the specified |name|. Returns
/// NULL if the preference does not exist. The returned object contains a copy
/// of the underlying preference value and modifications to the returned object
/// will not modify the underlying preference value. This function must be
/// called on the browser process UI thread.
/// </summary>
public unsafe virtual CefValue GetPreference(string name)
{
fixed(char *s0 = name)
{
var cstr0 = new cef_string_t {
Str = s0, Length = name != null ? name.Length : 0
};
return(SafeCall(CefValue.Wrap(CefValue.Create, NativeInstance->GetPreference(&cstr0))));
}
}
// void (*)(_cef_accessibility_handler_t* self, _cef_value_t* value)*
private static unsafe void OnAccessibilityLocationChangeImpl(cef_accessibility_handler_t *self, cef_value_t *value)
{
var instance = GetInstance((IntPtr)self) as CefAccessibilityHandler;
if (instance == null || ((ICefAccessibilityHandlerPrivate)instance).AvoidOnAccessibilityLocationChange())
{
ReleaseIfNonNull((cef_base_ref_counted_t *)value);
return;
}
instance.OnAccessibilityLocationChange(CefValue.Wrap(CefValue.Create, value));
}
/// <summary>
/// Sets the value at the specified key. Returns true (1) if the value was set
/// successfully. If |value| represents simple data then the underlying data
/// will be copied and modifications to |value| will not modify this object. If
/// |value| represents complex data (binary, dictionary or list) then the
/// underlying data will be referenced and modifications to |value| will modify
/// this object.
/// </summary>
public unsafe virtual bool SetValue(string key, CefValue value)
{
fixed(char *s0 = key)
{
var cstr0 = new cef_string_t {
Str = s0, Length = key != null ? key.Length : 0
};
return(SafeCall(NativeInstance->SetValue(&cstr0, (value != null) ? value.GetNativeInstance() : null) != 0));
}
}
/// <summary>
/// Returns the value at the specified key. For simple types the returned value
/// will copy existing data and modifications to the value will not modify this
/// object. For complex types (binary, dictionary and list) the returned value
/// will reference existing data and modifications to the value will modify
/// this object.
/// </summary>
public unsafe virtual CefValue GetValue(string key)
{
fixed(char *s0 = key)
{
var cstr0 = new cef_string_t {
Str = s0, Length = key != null ? key.Length : 0
};
return(SafeCall(CefValue.Wrap(CefValue.Create, NativeInstance->GetValue(&cstr0))));
}
}
/// <summary>
/// Executes a method call over the DevTools protocol.
/// </summary>
/// <param name="webview">The WebView control.</param>
/// <param name="method">The method name.</param>
/// <param name="parameters">
/// The JSON string with method parameters. May be null.
/// See the <see href="https://chromedevtools.github.io/devtools-protocol/">
/// DevTools Protocol documentation</see> for details of supported methods
/// and the expected parameters.
/// </param>
/// <param name="cancellationToken">The token to monitor for cancellation requests.</param>
/// <returns>
/// The JSON string with the response. Structure of the response varies depending
/// on the method name and is defined by the 'RETURN OBJECT' section of
/// the Chrome DevTools Protocol command description.
/// </returns>
/// <remarks>
/// Usage of the ExecuteDevToolsMethodAsync function does not require an active
/// DevTools front-end or remote-debugging session. Other active DevTools sessions
/// will continue to function independently. However, any modification of global
/// browser state by one session may not be reflected in the UI of other sessions.
/// <para/>
/// Communication with the DevTools front-end (when displayed) can be logged
/// for development purposes by passing the `--devtools-protocol-log-
/// file=<path>` command-line flag.
/// </remarks>
public static Task<string> ExecuteDevToolsMethodAsync(this IChromiumWebView webview, string method, string parameters, CancellationToken cancellationToken)
{
CefValue args = null;
if (parameters != null)
{
args = CefApi.CefParseJSON(parameters, CefJsonParserOptions.AllowTrailingCommas, out string errorMessage);
if (args is null)
throw new ArgumentOutOfRangeException(nameof(parameters), errorMessage is null ? "An error occurred during JSON parsing." : errorMessage);
}
return ExecuteDevToolsMethodAsync(webview, method, args is null ? default(CefDictionaryValue) : args.GetDictionary(), cancellationToken);
}
private static async Task <byte[]> ExecuteDevToolsMethodInternalAsync(IChromiumWebView webview, string method, CefDictionaryValue parameters, CancellationToken cancellationToken)
{
CefBrowser browser = webview.BrowserObject;
if (browser is null)
{
throw new InvalidOperationException();
}
cancellationToken.ThrowIfCancellationRequested();
CefBrowserHost browserHost = browser.Host;
DevToolsProtocolClient protocolClient = GetProtocolClient(browserHost);
await CefNetSynchronizationContextAwaiter.GetForThread(CefThreadId.UI);
cancellationToken.ThrowIfCancellationRequested();
int messageId = browserHost.ExecuteDevToolsMethod(protocolClient.IncrementMessageId(), method, parameters);
protocolClient.UpdateLastMessageId(messageId);
DevToolsMethodResult r;
if (cancellationToken.CanBeCanceled)
{
Task <DevToolsMethodResult> waitTask = protocolClient.WaitForMessageAsync(messageId);
await Task.WhenAny(waitTask, Task.Delay(Timeout.Infinite, cancellationToken)).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
r = waitTask.Result;
}
else
{
r = await protocolClient.WaitForMessageAsync(messageId).ConfigureAwait(false);
}
if (r.Success)
{
return(r.Result);
}
CefValue errorValue = CefApi.CefParseJSONBuffer(r.Result, CefJsonParserOptions.AllowTrailingCommas);
if (errorValue is null)
{
throw new DevToolsProtocolException($"An unknown error occurred while trying to execute the '{method}' method.");
}
throw new DevToolsProtocolException(errorValue.GetDictionary().GetString("message"));
}
/// <summary>
/// Set the |value| associated with preference |name|. Returns true (1) if the
/// value is set successfully and false (0) otherwise. If |value| is NULL the
/// preference will be restored to its default value. If setting the preference
/// fails then |error| will be populated with a detailed description of the
/// problem. This function must be called on the browser process UI thread.
/// </summary>
public unsafe virtual bool SetPreference(string name, CefValue value, ref string error)
{
fixed(char *s0 = name)
fixed(char *s2 = error)
{
var cstr0 = new cef_string_t {
Str = s0, Length = name != null ? name.Length : 0
};
var cstr2 = new cef_string_t {
Str = s2, Length = error != null ? error.Length : 0
};
var rv = NativeInstance->SetPreference(&cstr0, (value != null) ? value.GetNativeInstance() : null, &cstr2) != 0;
error = CefString.ReadAndFree(&cstr2);
GC.KeepAlive(this);
return(rv);
}
}
/// <summary>
/// Copies the V8 string into <see cref="CefValue"/> object.
/// </summary>
/// <param name="value">The destination <see cref="CefValue"/> object.</param>
/// <returns>Returns true if the value was set successfully.</returns>
public bool CopyV8StringToCefValue(CefValue value)
{
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
if (!IsString)
{
throw new InvalidOperationException();
}
cef_string_userfree_t userfreeStr = NativeInstance->GetStringValue();
try
{
return(value.NativeInstance->SetString((cef_string_t *)userfreeStr.Base.Base) != 0);
}
finally
{
CefString.Free(userfreeStr);
GC.KeepAlive(this);
}
}
/// <summary>
/// Called after renderer process sends accessibility location changes to the
/// browser process.
/// </summary>
public unsafe virtual void OnAccessibilityLocationChange(CefValue value)
{
}
/// <summary>
/// Called after renderer process sends accessibility tree changes to the
/// browser process.
/// </summary>
public unsafe virtual void OnAccessibilityTreeChange(CefValue value)
{
}
private static void ProcessXrayRequest(CefProcessMessageReceivedEventArgs e)
{
CefListValue args = e.Message.ArgumentList;
CefProcessMessage message = new CefProcessMessage(XrayResponseKey);
CefListValue retArgs = message.ArgumentList;
retArgs.SetSize(2);
retArgs.SetValue(0, args.GetValue(0));
CefValue retval = null;
XrayAction queryAction = (XrayAction)args.GetInt(1);
try
{
CefV8Context v8Context;
XrayObject target = null;
if (queryAction == XrayAction.GetGlobal)
{
v8Context = e.Frame.V8Context;
}
else
{
target = XrayHandle.FromCfxBinaryValue(args.GetBinary(2)).GetTarget(e.Frame);
v8Context = target?.Context ?? e.Frame.V8Context;
}
if (!v8Context.IsValid)
{
throw new ObjectDeadException();
}
if (!v8Context.Enter())
{
throw new ObjectDeadException();
}
try
{
CefV8Value rv = null;
switch (queryAction)
{
case XrayAction.Get:
long corsRid = ScriptableObjectProvider.Get(v8Context, target, args, out rv);
if (corsRid != 0)
{
var xray = new XrayHandle();
xray.dataType = XrayDataType.CorsRedirect;
xray.iRaw = corsRid;
retval = new CefValue();
retval.SetBinary(xray.ToCfxBinaryValue());
retArgs.SetValue(1, retval);
}
break;
case XrayAction.Set:
ScriptableObjectProvider.Set(v8Context, target, args);
break;
case XrayAction.InvokeMember:
rv = ScriptableObjectProvider.InvokeMember(v8Context, target, args);
break;
case XrayAction.Invoke:
rv = ScriptableObjectProvider.Invoke(v8Context, target, args);
break;
case XrayAction.GetGlobal:
rv = v8Context.GetGlobal();
break;
default:
throw new NotSupportedException();
}
if (rv != null)
{
retval = ScriptableObjectProvider.CastCefV8ValueToCefValue(v8Context, rv, out bool isXray);
if (!isXray)
{
rv.Dispose();
}
retArgs.SetValue(1, retval);
}
}
finally
{
v8Context.Exit();
}
}
catch (AccessViolationException) { throw; }
catch (OutOfMemoryException) { throw; }
catch (Exception ex)
{
//File.AppendAllText("G:\\outlog.txt", ex.GetType().Name + ": " + ex.Message + "\r\n" + ex.StackTrace + "\r\n");
retArgs.SetSize(4);
retArgs.SetString(1, ex.Message);
retArgs.SetString(2, ex.GetType().FullName);
retArgs.SetString(3, ex.StackTrace);
}
//CfxValueType t = e.Message.ArgumentList.GetType(0);
e.Frame.SendProcessMessage(CefProcessId.Browser, message);
message.Dispose();
retval?.Dispose();
e.Handled = true;
}
/// <summary>
/// Called after renderer process sends accessibility location changes to the
/// browser process.
/// </summary>
protected internal unsafe virtual void OnAccessibilityLocationChange(CefValue value)
{
}
/// <summary>
/// Sets the value at the specified index. Returns true (1) if the value was
/// set successfully. If |value| represents simple data then the underlying
/// data will be copied and modifications to |value| will not modify this
/// object. If |value| represents complex data (binary, dictionary or list)
/// then the underlying data will be referenced and modifications to |value|
/// will modify this object.
/// </summary>
public unsafe virtual bool SetValue(long index, CefValue value)
{
return(SafeCall(NativeInstance->SetValue(new UIntPtr((ulong)index), (value != null) ? value.GetNativeInstance() : null) != 0));
}
/// <summary>
/// Returns the value at the specified index. For simple types the returned
/// value will copy existing data and modifications to the value will not
/// modify this object. For complex types (binary, dictionary and list) the
/// returned value will reference existing data and modifications to the value
/// will modify this object.
/// </summary>
public unsafe virtual CefValue GetValue(long index)
{
return(SafeCall(CefValue.Wrap(CefValue.Create, NativeInstance->GetValue(new UIntPtr((ulong)index)))));
}
/// <summary>
/// Returns true (1) if this object and |that| object have the same underlying
/// data. If true (1) modifications to this object will also affect |that|
/// object and vice-versa.
/// </summary>
public unsafe virtual bool IsSame(CefValue that)
{
return(SafeCall(NativeInstance->IsSame((that != null) ? that.GetNativeInstance() : null) != 0));
}
/// <summary>
/// Returns a copy of this object. The underlying data will also be copied.
/// </summary>
public unsafe virtual CefValue Copy()
{
return(SafeCall(CefValue.Wrap(CefValue.Create, NativeInstance->Copy())));
}