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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsISAXLocator;
/**
* Basic interface for SAX error handlers.
*
* If a SAX application needs to implement customized error
* handling, it must implement this interface and then register an
* instance with the XML reader. The parser will then report all
* errors and warnings through this interface.
*
* WARNING: If an application does not register an ErrorHandler,
* XML parsing errors will go unreported. In order to detect validity
* errors, an ErrorHandler that does something with error() calls must
* be registered.
*
*/
[scriptable, uuid(e02b6693-6cca-11da-be43-001422106990)]
interface nsISAXErrorHandler: nsISupports {
/**
* Receive notification of a recoverable error.
*
* This corresponds to the definition of "error" in section 1.2
* of the W3C XML 1.0 Recommendation. For example, a validating
* parser would use this callback to report the violation of a
* validity constraint. The default behaviour is to take no
* action.
*
* The SAX parser must continue to provide normal parsing events
* after invoking this method: it should still be possible for the
* application to process the document through to the end. If the
* application cannot do so, then the parser should report a fatal
* error even if the XML recommendation does not require it to do
* so.
*
* Filters may use this method to report other, non-XML errors as
* well.
*
* @param locator The locator object for the error (may be null).
* @param error The error message.
*/
void error(in nsISAXLocator locator, in AString error);
/**
* Receive notification of a non-recoverable error.
*
* There is an apparent contradiction between the documentation
* for this method and the documentation for
* ContentHandler.endDocument(). Until this ambiguity is resolved in
* a future major release, clients should make no assumptions about
* whether endDocument() will or will not be invoked when the parser
* has reported a fatalError() or thrown an exception.
*
* This corresponds to the definition of "fatal error" in section
* 1.2 of the W3C XML 1.0 Recommendation. For example, a parser
* would use this callback to report the violation of a
* well-formedness constraint.
*
* The application must assume that the document is unusable
* after the parser has invoked this method, and should continue (if
* at all) only for the sake of collecting additional error
* messages: in fact, SAX parsers are free to stop reporting any
* other events once this method has been invoked.
*
* @param locator The locator object for the error (may be null).
* @param error The error message.
*/
void fatalError(in nsISAXLocator locator, in AString error);
/**
* Receive notification of a warning.
*
* SAX parsers will use this method to report conditions that are
* not errors or fatal errors as defined by the XML
* recommendation. The default behaviour is to take no action.
*
* The SAX parser must continue to provide normal parsing events
* after invoking this method: it should still be possible for the
* application to process the document through to the end.
*
* Filters may use this method to report other, non-XML warnings
* as well.
*
* @param locator The locator object for the warning (may be null).
* @param error The warning message.
*/
void ignorableWarning(in nsISAXLocator locator, in AString error);
};
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