internal static void setState(HTMLElement element, goog.a11y.aria.State stateName, object value)
{
if (value is JsArray <string> )
{
value = ((JsArray <string>)value).Join(" ");
}
var attrStateName = goog.a11y.aria.getAriaAttributeName_(stateName);
if ((value as string) == "" || value == Script.Undefined)
{
var defaultValueMap = goog.a11y.aria.datatables.getDefaultValuesMap();
// Work around for browsers that don't properly support ARIA.
// According to the ARIA W3C standard, user agents should allow
// setting empty value which results in setting the default value
// for the ARIA state if such exists. The exact text from the ARIA W3C
// standard (http://www.w3.org/TR/wai-aria/states_and_properties):
// "When a value is indicated as the default, the user agent
// MUST follow the behavior prescribed by this value when the state or
// property is empty or undefined."
// The defaultValueMap contains the default values for the ARIA states
// and has as a key the goog.a11y.aria.State constant for the state.
if (defaultValueMap.ContainsKey(stateName))
{
element.SetAttribute(attrStateName, (string)defaultValueMap[stateName]);
}
else
{
element.RemoveAttribute(attrStateName);
}
}
else
{
element.SetAttribute(attrStateName, value.ToString());
}
}
private static string getAriaAttributeName_(goog.a11y.aria.State ariaName)
{
if (goog.asserts.ENABLE_ASSERTS)
{
goog.asserts.assert((int)ariaName == 0, "ARIA attribute cannot be empty.");
goog.asserts.assert(
goog.a11y.aria.containsValue(ariaName),
"No such ARIA attribute " + ariaName);
}
return(goog.a11y.aria.ARIA_PREFIX_ + ariaName.ToString().ToLower());
}
internal static bool containsValue(goog.a11y.aria.State ariaName)
{
return(((int)ariaName > 0) && ((int)ariaName < (int)goog.a11y.aria.State._END_));
}
/// <summary>
/// Determines if the given ARIA attribute is an ARIA property or ARIA state.
/// </summary>
/// <param name="attr">The ARIA attribute to classify.</param>
/// <returns>If the ARIA attribute is an ARIA state.</returns>
private static bool isAriaState_(goog.a11y.aria.State attr)
{
return(attr == goog.a11y.aria.State.CHECKED ||
attr == goog.a11y.aria.State.SELECTED);
}
/// <summary>
/// Returns the appropriate ARIA attribute based on ARIA role if the ARIA
/// attribute is an ARIA state.
/// </summary>
/// <param name="element">The element from which to get the ARIA role for
/// matching ARIA state.</param>
/// <param name="attr">The ARIA attribute to check to see if it
/// can be applied to the given ARIA role.</param>
/// <returns>An ARIA attribute that can be applied to the
/// given ARIA role.</returns>
private static goog.a11y.aria.State getAriaStateForAriaRole_(HTMLElement element, goog.a11y.aria.State attr)
{
var role = goog.a11y.aria.getRole(element);
if (role == 0)
{
return(attr);
}
//role = /** @type {goog.a11y.aria.Role} */ (role);
var matchAttr = goog.ui.ControlRenderer.TOGGLE_ARIA_STATE_MAP_[role];
matchAttr = matchAttr != 0 ? matchAttr : attr;
return(goog.ui.ControlRenderer.isAriaState_(attr) ? matchAttr : attr);
}