mirror of
https://github.com/jezhiggins/arabica
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131 lines
4.7 KiB
C++
131 lines
4.7 KiB
C++
#ifndef ARABICA_LOCATOR_H
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#define ARABICA_LOCATOR_H
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// Locator.h
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#include <string>
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#include <SAX/ArabicaConfig.hpp>
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#include <Arabica/StringAdaptor.hpp>
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namespace Arabica
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{
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namespace SAX
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{
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/**
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* Interface for associating a SAX event with a document location.
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*
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* <p>If a SAX parser provides location information to the SAX
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* application, it does so by implementing this interface and then
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* passing an instance to the application using the content
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* handler's {@link ContentHandler#setDocumentLocator
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* setDocumentLocator} method. The application can use the
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* object to obtain the location of any other content handler event
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* in the XML source document.</p>
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*
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* <p>Note that the results returned by the object will be valid only
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* during the scope of each content handler method: the application
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* will receive unpredictable results if it attempts to use the
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* locator at any other time.</p>
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*
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* <p>SAX parsers are not required to supply a locator, but they are
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* very strongly encouraged to do so. If the parser supplies a
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* locator, it must do so before reporting any other document events.
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* If no locator has been set by the time the application receives
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* the {@link ContentHandler#startDocument startDocument}
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* event, the application should assume that a locator is not
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* available.</p>
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*
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* @since SAX 1.0
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* @author Jez Higgins,
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* <a href="mailto:jez@jezuk.co.uk">jez@jezuk.co.uk</a>
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* @version 2.0
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* @see ContentHandler#setDocumentLocator
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*/
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template<class string_type, class string_adaptor = Arabica::default_string_adaptor<string_type> >
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class Locator
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{
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public:
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typedef string_type stringT;
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virtual ~Locator() { }
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/**
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* Return the public identifier for the current document event.
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*
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* <p>The return value is the public identifier of the document
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* entity or of the external parsed entity in which the markup
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* triggering the event appears.</p>
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*
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* @return A string containing the public identifier, or
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* an empty string if none is available.
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* @see #getSystemId
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*/
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virtual stringT getPublicId() const = 0;
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/**
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* Return the system identifier for the current document event.
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*
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* <p>The return value is the system identifier of the document
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* entity or of the external parsed entity in which the markup
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* triggering the event appears.</p>
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*
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* <p>If the system identifier is a URL, the parser must resolve it
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* fully before passing it to the application.</p>
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*
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* @return A string containing the public identifier, or
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* an empty string if none is available.
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* @see #getPublicId
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*/
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virtual stringT getSystemId() const = 0;
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/**
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* Return the line number where the current document event ends.
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*
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* <p><strong>Warning:</strong> The return value from the method
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* is intended only as an approximation for the sake of error
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* reporting; it is not intended to provide sufficient information
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* to edit the character content of the original XML document.</p>
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*
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* <p>The return value is an approximation of the line number
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* in the document entity or external parsed entity where the
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* markup triggering the event appears.</p>
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*
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* <p>If possible, the SAX driver should provide the line position
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* of the first character after the text associated with the document
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* event. The first line in the document is line 1.</p>
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*
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* @return The line number, or -1 if none is available.
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* @see #getColumnNumber
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*/
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virtual size_t getLineNumber() const = 0;
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/**
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* Return the column number where the current document event ends.
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*
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* <p><strong>Warning:</strong> The return value from the method
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* is intended only as an approximation for the sake of error
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* reporting; it is not intended to provide sufficient information
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* to edit the character content of the original XML document.</p>
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*
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* <p>The return value is an approximation of the column number
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* in the document entity or external parsed entity where the
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* markup triggering the event appears.</p>
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*
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* <p>If possible, the SAX driver should provide the line position
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* of the first character after the text associated with the document
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* event.</p>
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*
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* <p>If possible, the SAX driver should provide the line position
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* of the first character after the text associated with the document
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* event. The first column in each line is column 1.</p>
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*
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* @return The column number, or -1 if none is available.
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* @see #getLineNumber
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*/
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virtual size_t getColumnNumber() const = 0;
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}; // class Locator
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} // namespace SAX
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} // namespace Arabica
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#endif
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// end of file
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