/// <summary>
/// Prepares to render the control.
/// </summary>
/// <param name="e">An <see cref="T:System.EventArgs"/> object that contains the event data.</param>
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
if (!this.Visible)
{
return;
}
if (this.DownloadYahooUILibrary)
{
// Although we'll add the <script> tag to download the YAHOO component,
// a download failure may have occurred, so protect ourselves from a
// script error using an if (YAHOO) block. But apparently at least in IE
// that's not even enough, so we use a try/catch.
string yuiLoadScript = @"try { if (YAHOO) {
var loader = new YAHOO.util.YUILoader({
require: ['button', 'menu'],
loadOptional: false,
combine: true
});
loader.insert();
} } catch (e) { }";
this.Page.ClientScript.RegisterClientScriptInclude(
"yuiloader", this.Page.Request.Url.IsTransportSecure() ? YuiLoaderHttps : YuiLoaderHttp);
this.Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "requiredYuiComponents", yuiLoadScript, true);
}
var css = new HtmlLink();
try {
css.Href = this.Page.ClientScript.GetWebResourceUrl(typeof(OpenIdAjaxTextBox), EmbeddedStylesheetResourceName);
css.Attributes["rel"] = "stylesheet";
css.Attributes["type"] = "text/css";
ErrorUtilities.VerifyHost(this.Page.Header != null, OpenIdStrings.HeadTagMustIncludeRunatServer);
this.Page.Header.Controls.AddAt(0, css); // insert at top so host page can override
} catch {
css.Dispose();
throw;
}
this.PrepareClientJavascript();
// If an Identifier is preset on this control, preload discovery on that identifier,
// but only if we're not already persisting an authentication result since that would
// be redundant.
this.Page.RegisterAsyncTask(new PageAsyncTask(async ct => {
var response = await this.GetAuthenticationResponseAsync(ct);
if (this.Identifier != null && response == null)
{
await this.PreloadDiscoveryAsync(this.Identifier, ct);
}
}));
}
/// <summary>
/// Raises the <see cref="E:System.Web.UI.Control.PreRender"/> event.
/// </summary>
/// <param name="e">An <see cref="T:System.EventArgs"/> object that contains the event data.</param>
protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);
this.EnsureValidButtons();
var css = new HtmlLink();
try {
css.Href = this.Page.ClientScript.GetWebResourceUrl(typeof(OpenIdSelector), EmbeddedStylesheetResourceName);
css.Attributes["rel"] = "stylesheet";
css.Attributes["type"] = "text/css";
ErrorUtilities.VerifyHost(this.Page.Header != null, OpenIdStrings.HeadTagMustIncludeRunatServer);
this.Page.Header.Controls.AddAt(0, css); // insert at top so host page can override
} catch {
css.Dispose();
throw;
}
// Import the .js file where most of the code is.
this.Page.ClientScript.RegisterClientScriptResource(typeof(OpenIdSelector), EmbeddedScriptResourceName);
// Provide javascript with a way to post the login assertion.
const string PostLoginAssertionMethodName = "postLoginAssertion";
const string PositiveAssertionParameterName = "positiveAssertion";
const string ScriptFormat = @"window.{2} = function({0}) {{
$('#{3}')[0].setAttribute('value', {0});
{1};
}};";
string script = string.Format(
CultureInfo.InvariantCulture,
ScriptFormat,
PositiveAssertionParameterName,
this.Page.ClientScript.GetPostBackEventReference(this, null, false),
PostLoginAssertionMethodName,
this.positiveAssertionField.ClientID);
this.Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "Postback", script, true);
this.Page.RegisterAsyncTask(new PageAsyncTask(async ct => {
await this.PreloadDiscoveryAsync(
this.Buttons.OfType <SelectorProviderButton>().Select(op => op.OPIdentifier).Where(id => id != null),
ct);
}));
this.textBox.Visible = this.OpenIdTextBoxVisible;
}