private static string CopyImageElementToDataImageString(GeckoHtmlElement element,
string imageFormat, float xOffset, float yOffset, float width, float height)
{
if (width == 0)
{
throw new ArgumentException("width");
}
if (height == 0)
{
throw new ArgumentException("height");
}
string data;
using (AutoJSContext context = new AutoJSContext(GlobalJSContextHolder.GetJSContextForDomWindow(element.OwnerDocument.DefaultView.DomWindow)))
{
context.EvaluateScript("window.__selectedElement = this", (nsISupports)(nsIDOMElement)element.DomObject, out data);
context.EvaluateTrustedScript(string.Format(@"(function(canvas, ctx)
{{
canvas = document.createElement('canvas');
canvas.width = {2};
canvas.height = {3};
ctx = canvas.getContext('2d');
ctx.drawImage(window.__selectedElement, -{0}, -{1});
return canvas.toDataURL('{4}');
}}
)()" , xOffset, yOffset, width, height, imageFormat), out data);
}
return(data);
}
public void EvaluateScript_JavascriptIncreasePriviligesCrossFrameAccess_ScriptExecutesAndReturnsExpectedResult()
{
string result;
string aboutBlank;
using (var page = new GeckoWebBrowser())
{
IntPtr unused = page.Handle;
page.CreateWindow += (s, e) => { e.WebBrowser = browser; };
using (AutoJSContext context = new AutoJSContext(page.Window.JSContext))
{
Assert.IsTrue(context.EvaluateScript("window.open('http://www.google.com'); window.location.href", out aboutBlank));
}
browser.NavigateFinishedNotifier.BlockUntilNavigationFinished();
using (AutoJSContext context = new AutoJSContext(browser.Window.JSContext))
{
Assert.IsTrue(context.EvaluateScript("window.location.href", out result));
Assert.AreNotEqual(aboutBlank, result);
// cross frame access
Assert.IsFalse(context.EvaluateScript("opener.location.href", out result));
Assert.IsTrue(context.EvaluateTrustedScript("opener.location.href", out result));
Assert.AreEqual(aboutBlank, result);
}
page.Stop();
}
}