internal CanvasRenderingContext2D(Window window, IHTMLCanvasElement canvas)
{
this.window = window;
this.canvas = canvas;
this.savedStates = new Stack<DrawingState>();
this.state = new DrawingState();
}
internal HTMLCanvasElement(IWindow window)
: base(window)
{
this.window = (Window)window;
this.height = this.clientHeight;
this.width = this.clientWidth;
}
public ChakraHost()
{
if (Native.JsCreateRuntime(JavaScriptRuntimeAttributes.None, null, out runtime) !=
JavaScriptErrorCode.NoError)
{
throw new Exception("failed to create runtime.");
}
if (Native.JsCreateContext(runtime, out context) != JavaScriptErrorCode.NoError)
throw new Exception("failed to create execution context.");
if (Native.JsSetCurrentContext(context) != JavaScriptErrorCode.NoError)
throw new Exception("failed to set current context.");
// ES6 Promise callback
JavaScriptPromiseContinuationCallback promiseContinuationCallback =
delegate (JavaScriptValue task, IntPtr callbackState)
{
promiseCallback = task;
};
if (Native.JsSetPromiseContinuationCallback(promiseContinuationCallback, IntPtr.Zero) !=
JavaScriptErrorCode.NoError)
throw new Exception("failed to setup callback for ES6 Promise");
// Bind to global object
// setTimeout
SetTimeoutJavaScriptNativeFunction = SetTimeout.SetTimeoutJavaScriptNativeFunction;
DefineHostCallback("setTimeout", SetTimeoutJavaScriptNativeFunction);
SendToHostJavaScriptNativeFunction = CommunicationManager.SendToHostJavaScriptNativeFunction;
DefineHostCallback("sendToHost", SendToHostJavaScriptNativeFunction);
// Projections
if (Native.JsProjectWinRTNamespace("ChakraBridge") != JavaScriptErrorCode.NoError)
throw new Exception("failed to project ChakraBridge namespace.");
this.window = new Window();
ProjectObjectToGlobal(new Console(), "console");
ProjectObjectToGlobal(this.window, "window");
ProjectObjectToGlobal(this.window.navigator, "navigator");
ProjectObjectToGlobal(this.window.document, "document");
// Add references
RunScript(@"XMLHttpRequest = ChakraBridge.XMLHttpRequest;
HTMLCanvasElement = ChakraBridge.HTMLCanvasElementWrapper;
atob = window.atob;
btoa = window.btoa;");
#if DEBUG
// Debug
if (Native.JsStartDebugging() != JavaScriptErrorCode.NoError)
throw new Exception("failed to start debugging.");
#endif
}