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/*
* xlink.h : interfaces to the hyperlinks detection module
*
* See Copyright for the status of this software.
*
* Related specification: http://www.w3.org/TR/xlink
* http://www.w3.org/HTML/
* and XBase
*
* daniel@veillard.com
*/
#ifndef __XML_XLINK_H__
#define __XML_XLINK_H__
#include <libxml/tree.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* Various defines for the various Link properties.
*
* NOTE: the link detection layer will try to resolve QName expansion
* of namespaces. If "foo" is the prefix for "http://foo.com/"
* then the link detection layer will expand role="foo:myrole"
* to "http://foo.com/:myrole".
* NOTE: the link detection layer will expand URI-Refences found on
* href attributes by using the base mechanism if found.
*/
typedef xmlChar *xlinkHRef;
typedef xmlChar *xlinkRole;
typedef xmlChar *xlinkTitle;
typedef enum {
XLINK_TYPE_NONE = 0,
XLINK_TYPE_SIMPLE,
XLINK_TYPE_EXTENDED,
XLINK_TYPE_EXTENDED_SET
} xlinkType;
typedef enum {
XLINK_SHOW_NONE = 0,
XLINK_SHOW_NEW,
XLINK_SHOW_EMBED,
XLINK_SHOW_REPLACE
} xlinkShow;
typedef enum {
XLINK_ACTUATE_NONE = 0,
XLINK_ACTUATE_AUTO,
XLINK_ACTUATE_ONREQUEST
} xlinkActuate;
/**
* xlinkNodeDetectFunc:
* @ctx: user data pointer
* @node: the node to check
*
* This is the prototype for the link detection routine.
* It calls the default link detection callbacks upon link detection.
*/
typedef void (*xlinkNodeDetectFunc) (void *ctx, xmlNodePtr node);
/**
* The link detection module interact with the upper layers using
* a set of callback registered at parsing time.
*/
/**
* xlinkSimpleLinkFunk:
* @ctx: user data pointer
* @node: the node carrying the link
* @href: the target of the link
* @role: the role string
* @title: the link title
*
* This is the prototype for a simple link detection callback.
*/
typedef void
(*xlinkSimpleLinkFunk) (void *ctx,
xmlNodePtr node,
const xlinkHRef href,
const xlinkRole role,
const xlinkTitle title);
/**
* xlinkExtendedLinkFunk:
* @ctx: user data pointer
* @node: the node carrying the link
* @nbLocators: the number of locators detected on the link
* @hrefs: pointer to the array of locator hrefs
* @roles: pointer to the array of locator roles
* @nbArcs: the number of arcs detected on the link
* @from: pointer to the array of source roles found on the arcs
* @to: pointer to the array of target roles found on the arcs
* @show: array of values for the show attributes found on the arcs
* @actuate: array of values for the actuate attributes found on the arcs
* @nbTitles: the number of titles detected on the link
* @title: array of titles detected on the link
* @langs: array of xml:lang values for the titles
*
* This is the prototype for a extended link detection callback.
*/
typedef void
(*xlinkExtendedLinkFunk)(void *ctx,
xmlNodePtr node,
int nbLocators,
const xlinkHRef *hrefs,
const xlinkRole *roles,
int nbArcs,
const xlinkRole *from,
const xlinkRole *to,
xlinkShow *show,
xlinkActuate *actuate,
int nbTitles,
const xlinkTitle *titles,
const xmlChar **langs);
/**
* xlinkExtendedLinkSetFunk:
* @ctx: user data pointer
* @node: the node carrying the link
* @nbLocators: the number of locators detected on the link
* @hrefs: pointer to the array of locator hrefs
* @roles: pointer to the array of locator roles
* @nbTitles: the number of titles detected on the link
* @title: array of titles detected on the link
* @langs: array of xml:lang values for the titles
*
* This is the prototype for a extended link set detection callback.
*/
typedef void
(*xlinkExtendedLinkSetFunk) (void *ctx,
xmlNodePtr node,
int nbLocators,
const xlinkHRef *hrefs,
const xlinkRole *roles,
int nbTitles,
const xlinkTitle *titles,
const xmlChar **langs);
/**
* This is the structure containing a set of Links detection callbacks.
*
* There is no default xlink callbacks, if one want to get link
* recognition activated, those call backs must be provided before parsing.
*/
typedef struct _xlinkHandler xlinkHandler;
typedef xlinkHandler *xlinkHandlerPtr;
struct _xlinkHandler {
xlinkSimpleLinkFunk simple;
xlinkExtendedLinkFunk extended;
xlinkExtendedLinkSetFunk set;
};
/*
* The default detection routine, can be overridden, they call the default
* detection callbacks.
*/
xlinkNodeDetectFunc xlinkGetDefaultDetect (void);
void xlinkSetDefaultDetect (xlinkNodeDetectFunc func);
/*
* Routines to set/get the default handlers.
*/
xlinkHandlerPtr xlinkGetDefaultHandler (void);
void xlinkSetDefaultHandler (xlinkHandlerPtr handler);
/*
* Link detection module itself.
*/
xlinkType xlinkIsLink (xmlDocPtr doc,
xmlNodePtr node);
#ifdef __cplusplus
}
#endif
#endif /* __XML_XLINK_H__ */
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