Sets our main struct and passes it to the parent class
Creates a new parse context. A parse context is used to parse marked-up documents. You can feed any number of documents into a context, as long as no errors occur; once an error occurs, the parse context can't continue to parse text (you have to free it and create a new parse context).
Increases the reference count of context. Since 2.36
Signals to the GMarkupParseContext that all data has been fed into the parse context with g_markup_parse_context_parse(). This function reports an error if the document isn't complete, for example if elements are still open.
Frees a GMarkupParseContext. This function can't be called from inside one of the GMarkupParser functions or while a subparser is pushed.
Retrieves the name of the currently open element. If called from the start_element or end_element handlers this will give the element_name as passed to those functions. For the parent elements, see g_markup_parse_context_get_element_stack(). Since 2.2
Retrieves the element stack from the internal state of the parser. The returned GSList is a list of strings where the first item is the currently open tag (as would be returned by g_markup_parse_context_get_element()) and the next item is its immediate parent. This function is intended to be used in the start_element and end_element handlers where g_markup_parse_context_get_element() would merely return the name of the element that is being processed. Since 2.16
Retrieves the current line number and the number of the character on that line. Intended for use in error messages; there are no strict semantics for what constitutes the "current" line number other than "the best number we could come up with for error messages."
Get the main Gtk struct
the main Gtk struct as a void*
Returns the user_data associated with context. This will either be the user_data that was provided to g_markup_parse_context_new() or to the most recent call of g_markup_parse_context_push(). Since 2.18
Feed some data to the GMarkupParseContext. The data need not be valid UTF-8; an error will be signaled if it's invalid. The data need not be an entire document; you can feed a document into the parser incrementally, via multiple calls to this function. Typically, as you receive data from a network connection or file, you feed each received chunk of data into this function, aborting the process if an error occurs. Once an error is reported, no further data may be fed to the GMarkupParseContext; all errors are fatal.
Completes the process of a temporary sub-parser redirection. This function exists to collect the user_data allocated by a matching call to g_markup_parse_context_push(). It must be called in the end_element handler corresponding to the start_element handler during which g_markup_parse_context_push() was called. You must not call this function from the error callback -- the user_data is provided directly to the callback in that case. This function is not intended to be directly called by users interested in invoking subparsers. Instead, it is intended to be used by the subparsers themselves to implement a higher-level interface. Since 2.18
Temporarily redirects markup data to a sub-parser. This function may only be called from the start_element handler of a GMarkupParser. It must be matched with a corresponding call to g_markup_parse_context_pop() in the matching end_element handler (except in the case that the parser aborts due to an error). All tags, text and other data between the matching tags is redirected to the subparser given by parser. user_data is used as the user_data for that parser. user_data is also passed to the error callback in the event that an error occurs. This includes errors that occur in subparsers of the subparser. The end tag matching the start tag for which this call was made is handled by the previous parser (which is given its own user_data) which is why g_markup_parse_context_pop() is provided to allow "one last access" to the user_data provided to this function. In the case of error, the user_data provided here is passed directly to the error callback of the subparser and g_markup_parse_context_pop() should not be called. In either case, if user_data was allocated then it ought to be freed from both of these locations. This function is not intended to be directly called by users interested in invoking subparsers. Instead, it is intended to be used by the subparsers themselves to implement a higher-level interface. As an example, see the following implementation of a simple parser that counts the number of tags encountered. In order to allow this parser to be easily used as a subparser, the Since 2.18
Decreases the reference count of context. When its reference count drops to 0, it is freed. Since 2.36
Escapes text so that the markup parser will parse it verbatim. Less than, greater than, ampersand, etc. are replaced with the corresponding entities. This function would typically be used when writing out a file to be parsed with the markup parser. Note that this function doesn't protect whitespace and line endings from being processed according to the XML rules for normalization of line endings and attribute values. Note also that this function will produce character references in the range of x1; ... x1f; for all control sequences except for tabstop, newline and carriage return. The character references in this range are not valid XML 1.0, but they are valid XML 1.1 and will be accepted by the GMarkup parser.
Formats the data in args according to format, escaping all string and character arguments in the fashion of g_markup_escape_text(). See g_markup_printf_escaped(). Since 2.4
the main Gtk struct
The "GMarkup" parser is intended to parse a simple markup format that's a subset of XML. This is a small, efficient, easy-to-use parser. It should not be used if you expect to interoperate with other applications generating full-scale XML. However, it's very useful for application data files, config files, etc. where you know your application will be the only one writing the file. Full-scale XML parsers should be able to parse the subset used by GMarkup, so you can easily migrate to full-scale XML at a later time if the need arises.
GMarkup is not guaranteed to signal an error on all invalid XML; the parser may accept documents that an XML parser would not. However, XML documents which are not well-formed[6] are not considered valid GMarkup documents.
Simplifications to XML include:
Only UTF-8 encoding is allowed No user-defined entities Processing instructions, comments and the doctype declaration are "passed through" but are not interpreted in any way No DTD or validation.
The markup format does support:
Elements Attributes 5 standard entities: amp; lt; gt; quot; apos;
Character references Sections marked as CDATA