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SqMod/vendor/POCO/XML/include/Poco/SAX/Locator.h
Sandu Liviu Catalin 233fc103f9 Update POCO library.
2023-03-23 20:19:11 +02:00

104 lines
4.2 KiB
C++

//
// Locator.h
//
// Library: XML
// Package: SAX
// Module: SAX
//
// SAX Locator Interface.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef SAX_Locator_INCLUDED
#define SAX_Locator_INCLUDED
#include "Poco/XML/XML.h"
#include "Poco/XML/XMLString.h"
namespace Poco {
namespace XML {
class XML_API Locator
/// Interface for associating a SAX event with a document location.
///
/// If a SAX parser provides location information to the SAX application, it does so by
/// implementing this interface and then passing an instance to the application using the
/// content handler's setDocumentLocator method. The application can use the object to obtain
/// the location of any other SAX event in the XML source document.
///
/// Note that the results returned by the object will be valid only during the scope of each
/// callback method: the application will receive unpredictable results if it attempts to use
/// the locator at any other time, or after parsing completes.
///
/// SAX parsers are not required to supply a locator, but they are very strongly encouraged to
/// do so. If the parser supplies a locator, it must do so before reporting any other document
/// events. If no locator has been set by the time the application receives the startDocument event,
/// the application should assume that a locator is not available.
{
public:
virtual XMLString getPublicId() const = 0;
/// Return the public identifier for the current document event.
///
/// The return value is the public identifier of the document entity or of the external
/// parsed entity in which the markup triggering the event appears.
virtual XMLString getSystemId() const = 0;
/// Return the system identifier for the current document event.
///
/// The return value is the system identifier of the document entity or of the external
/// parsed entity in which the markup triggering the event appears.
///
/// If the system identifier is a URL, the parser must resolve it fully before passing
/// it to the application. For example, a file name must always be provided as a
/// file:... URL, and other kinds of relative URI are also resolved against their bases.
virtual int getLineNumber() const = 0;
/// Return the line number where the current document event ends.
/// Lines are delimited by line ends, which are defined in the XML specification.
///
/// Warning: The return value from the method is intended only as an approximation for
/// the sake of diagnostics; it is not intended to provide sufficient information to
/// edit the character content of the original XML document. In some cases, these "line"
/// numbers match what would be displayed as columns, and in others they may not match the
/// source text due to internal entity expansion.
///
/// The return value is an approximation of the line number in the document entity or external
/// parsed entity where the markup triggering the event appears.
///
/// If possible, the SAX driver should provide the line position of the first character after
/// the text associated with the document event. The first line is line 1.
virtual int getColumnNumber() const = 0;
/// Return the column number where the current document event ends.
/// This is one-based number of characters since the last line end.
///
/// Warning: The return value from the method is intended only as an approximation
/// for the sake of diagnostics; it is not intended to provide sufficient information
/// to edit the character content of the original XML document. For example, when lines
/// contain combining character sequences, wide characters, surrogate pairs, or bi-directional
/// text, the value may not correspond to the column in a text editor's display.
///
/// The return value is an approximation of the column number in the document entity or external
/// parsed entity where the markup triggering the event appears.
///
/// If possible, the SAX driver should provide the line position of the first character after
/// the text associated with the document event. The first column in each line is column 1.
protected:
virtual ~Locator();
};
} } // namespace Poco::XML
#endif // SAX_Locator_INCLUDED