Function _detectSandbox

docs/s/lib/zeroclipboard/ZeroClipboard.js:1713–1749

(doNotReassessFlashSupport)

 * @private
 */
  var _detectSandbox = function(doNotReassessFlashSupport) {
    var effectiveScriptOrigin, frame, frameError, previousState = _flashState.sandboxed, isSandboxed = null;
    doNotReassessFlashSupport = doNotReassessFlashSupport === true;
    if (_pageIsFramed === false) {
      isSandboxed = false;
    } else {
      try {
        frame = window.frameElement || null;
      } catch (e) {
        frameError = {
          name: e.name,
          message: e.message
        };
      }
      if (frame && frame.nodeType === 1 && frame.nodeName === "IFRAME") {
        try {
          isSandboxed = frame.hasAttribute("sandbox");
        } catch (e) {
          isSandboxed = null;
        }
      } else {
        try {
          effectiveScriptOrigin = document.domain || null;
        } catch (e) {
          effectiveScriptOrigin = null;
        }
        if (effectiveScriptOrigin === null || frameError && frameError.name === "SecurityError" && /(^|[\s\(\[@])sandbox(es|ed|ing|[\s\.,!\)\]@]|$)/.test(frameError.message.toLowerCase())) {
          isSandboxed = true;
        }
      }
    }
    _flashState.sandboxed = isSandboxed;
    if (previousState !== isSandboxed && !doNotReassessFlashSupport) {
      _detectFlashSupport(_ActiveXObject);
    }
    return isSandboxed;
  };
  /**
 * Detect the Flash Player status, version, and plugin type.
 *