third_party/WebKit/Source/modules/mediastream/MediaErrorState.cpp

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 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
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#include "modules/mediastream/MediaErrorState.h"

#include "core/dom/ExceptionCode.h"
#include "modules/mediastream/OverconstrainedError.h"

namespace blink {

MediaErrorState::MediaErrorState() : error_type_(kNoError), code_(0) {}

void MediaErrorState::ThrowTypeError(const String& message) {
  error_type_ = kTypeError;
  message_ = message;
}

void MediaErrorState::ThrowDOMException(ExceptionCode code,
                                        const String& message) {
  error_type_ = kDOMException;
  code_ = code;
  message_ = message;
}

void MediaErrorState::ThrowConstraintError(const String& message,
                                           const String& constraint) {
  error_type_ = kConstraintError;
  message_ = message;
  constraint_ = constraint;
}

void MediaErrorState::Reset() {
  error_type_ = kNoError;
}

bool MediaErrorState::HadException() {
  return error_type_ != kNoError;
}

bool MediaErrorState::CanGenerateException() {
  return error_type_ == kTypeError || error_type_ == kDOMException;
}

void MediaErrorState::RaiseException(ExceptionState& target) {
  switch (error_type_) {
    case kNoError:
      NOTREACHED();
      break;
    case kTypeError:
      target.ThrowTypeError(message_);
      break;
    case kDOMException:
      target.ThrowDOMException(code_, message_);
      break;
    case kConstraintError:
      // This is for the cases where we can't pass back a
      // NavigatorUserMediaError.
      // So far, we have this in the constructor of RTCPeerConnection,
      // which is due to be deprecated.
      // TODO(hta): Remove this code. https://crbug.com/576581
      target.ThrowDOMException(kNotSupportedError,
                               "Unsatisfiable constraint " + constraint_);
      break;
    default:
      NOTREACHED();
  }
}

String MediaErrorState::GetErrorMessage() {
  switch (error_type_) {
    case kNoError:
      NOTREACHED();
      break;
    case kTypeError:
    case kDOMException:
      return message_;
    case kConstraintError:
      // This is for the cases where we can't pass back a
      // NavigatorUserMediaError.
      // So far, we have this in the constructor of RTCPeerConnection,
      // which is due to be deprecated.
      // TODO(hta): Remove this code. https://crbug.com/576581
      return "Unsatisfiable constraint " + constraint_;
    default:
      NOTREACHED();
  }

  return String();
}

DOMExceptionOrOverconstrainedError MediaErrorState::CreateError() {
  DCHECK(error_type_ == kConstraintError);
  return DOMExceptionOrOverconstrainedError::FromOverconstrainedError(
      OverconstrainedError::Create(constraint_, message_));
}

}  // namespace blink