# Glib::Markup::Parser Class Reference
[Simple XML Subset Parser]

The abstract markup parser base class. More...

Inherits sigc::trackable.

Collaboration diagram for Glib::Markup::Parser:
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List of all members.

## Public Types
typedef std::map < Glib::ustring, Glib::ustring, Glib::Markup::AttributeKeyLess > | AttributeMap
## Public Member Functions
virtual | ~Parser ()=0
## Protected Member Functions
| Parser ()
| Constructs a Parser object.
virtual void | on_start_element (ParseContext& context, const Glib::ustring& element_name, const AttributeMap& attributes)
| Called for open tags `<foo bar="baz">`.
virtual void | on_end_element (ParseContext& context, const Glib::ustring& element_name)
| Called for close tags `</foo>`.
virtual void | on_text (ParseContext& context, const Glib::ustring& text)
| Called for character data.
virtual void | on_passthrough (ParseContext& context, const Glib::ustring& passthrough_text)
| Called for strings that should be re-saved verbatim in this same position, but are not otherwise interpretable.
virtual void | on_error (ParseContext& context, const MarkupError& error)
| Called on error, including one thrown by an overridden virtual method.

## Detailed Description

The abstract markup parser base class.

To implement a parser for your markup format, derive from Glib::Markup::Parser and implement the virtual methods.

You don't have to override all of the virtual methods. If a particular method is not implement the data passed to it will be ignored. Except for the error method, any of these callbacks can throw an error exception; in particular the MarkupError::UNKNOWN_ELEMENT, MarkupError::UNKNOWN_ATTRIBUTE, and MarkupError::INVALID_CONTENT errors are intended to be thrown from these overridden methods. If you throw an error from a method, Glib::Markup::ParseContext::parse() will report that error back to its caller.

## Member Typedef Documentation

typedef std::map<Glib::ustring, Glib::ustring, Glib::Markup::AttributeKeyLess> Glib::Markup::Parser::AttributeMap

## Constructor & Destructor Documentation

virtual Glib::Markup::Parser::~Parser | ( |  | ) | `[pure virtual]`

Glib::Markup::Parser::Parser | ( |  | ) | `[protected]`

Constructs a Parser object.

Note that Markup::Parser is an abstract class which can't be instantiated directly. To implement the parser for your markup format, derive from Markup::Parser and implement the virtual methods.

## Member Function Documentation

virtual void Glib::Markup::Parser::on_end_element | ( | ParseContext& | context,
|  | const Glib::ustring& | element_name |
| ) |  |  | `[protected, virtual]`

Called for close tags `</foo>`.

This virtual method is invoked when the closing tag of an element is seen.

Parameters:

  | context | The Markup::ParseContext object the parsed data belongs to.
  | element_name | The name of the element.

Exceptions:

  | Glib::MarkupError | An exception you should throw if something went wrong, for instance if an unknown attribute name was encountered. In particular the MarkupError::UNKNOWN_ELEMENT, MarkupError::UNKNOWN_ATTRIBUTE, and MarkupError::INVALID_CONTENT errors are intended to be thrown from user-implemented methods.

virtual void Glib::Markup::Parser::on_error | ( | ParseContext& | context,
|  | const MarkupError& | error |
| ) |  |  | `[protected, virtual]`

Called on error, including one thrown by an overridden virtual method.

Parameters:

  | context | The Markup::ParseContext object the parsed data belongs to.
  | error | A MarkupError object with detailed information about the error.

virtual void Glib::Markup::Parser::on_passthrough | ( | ParseContext& | context,
|  | const Glib::ustring& | passthrough_text |
| ) |  |  | `[protected, virtual]`

Called for strings that should be re-saved verbatim in this same position, but are not otherwise interpretable.

This virtual method is invoked for comments, processing instructions and doctype declarations; if you're re-writing the parsed document, write the passthrough text back out in the same position.

Parameters:

  | context | The Markup::ParseContext object the parsed data belongs to.
  | passthrough_text | The text that should be passed through.

Exceptions:

  | Glib::MarkupError | An exception you should throw if something went wrong, for instance if an unknown attribute name was encountered. In particular the MarkupError::UNKNOWN_ELEMENT, MarkupError::UNKNOWN_ATTRIBUTE, and MarkupError::INVALID_CONTENT errors are intended to be thrown from user-implemented methods.

virtual void Glib::Markup::Parser::on_start_element | ( | ParseContext& | context,
|  | const Glib::ustring& | element_name,
|  | const AttributeMap & | attributes |
| ) |  |  | `[protected, virtual]`

Called for open tags `<foo bar="baz">`.

This virtual method is invoked when the opening tag of an element is seen.

Parameters:

  | context | The Markup::ParseContext object the parsed data belongs to.
  | element_name | The name of the element.
  | attributes | A map of attribute name/value pairs.

Exceptions:

  | Glib::MarkupError | An exception you should throw if something went wrong, for instance if an unknown attribute name was encountered. In particular the MarkupError::UNKNOWN_ELEMENT, MarkupError::UNKNOWN_ATTRIBUTE, and MarkupError::INVALID_CONTENT errors are intended to be thrown from user-implemented methods.

virtual void Glib::Markup::Parser::on_text | ( | ParseContext& | context,
|  | const Glib::ustring& | text |
| ) |  |  | `[protected, virtual]`

Called for character data.

This virtual method is invoked when some text is seen (text is always inside an element).

Parameters:

  | context | The Markup::ParseContext object the parsed data belongs to.
  | text | The parsed text in UTF-8 encoding.

Exceptions:

  | Glib::MarkupError | An exception you should throw if something went wrong, for instance if an unknown attribute name was encountered. In particular the MarkupError::UNKNOWN_ELEMENT, MarkupError::UNKNOWN_ATTRIBUTE, and MarkupError::INVALID_CONTENT errors are intended to be thrown from user-implemented methods.

The documentation for this class was generated from the following file:

- glibmm/markup.h