- From: Henrik Frystyk Nielsen <frystyk@ptsun00.cern.ch>
- Date: Fri, 22 Jul 94 13:11:22 +0200
- To: www-lib@www0.cern.ch
Jean Alexis Montignies <ja@lithnext.epfl.ch> wrote: > I need, to program my browser to link any HTAnchor (child or parent) structure > with a client specific structure, wich is in my case an Objective-C object id. > > If the library was in Objective-C, i should have made a sub-class of the > HTAnchor class, but that's not the case ;-). > > For the moment, i've modified the HTAnchor.c module to manage one more field : > 'userData'. The definition of a parent anchor is as follows (taken from HTAnchor.html): struct _HTParentAnchor { /* Common part from the generic anchor structure */ HTLink mainLink; /* Main (or default) destination of this */ HTList * links; /* List of extra links from this, if any */ HTParentAnchor * parent; /* Parent of this anchor (self) */ /* ParentAnchor-specific information */ HTList * children; /* Subanchors of this, if any */ HTList * sources; /* List of anchors pointing to this, if any */ HyperDoc * document; /* The document within which this is an anchor */ char * address; /* Absolute address of this node */ HTFormat format; /* Pointer to node format descriptor */ BOOL isIndex; /* Acceptance of a keyword search */ char * title; /* Title of document */ HTList* methods; /* Methods available as HTAtoms */ void * protocol; /* Protocol object */ char * physical; /* Physical address */ HTList * cacheItems; /* Cache hits (see HTFWriter) for this URL */ long int size; /* Indicative size only if multiformat */ }; The HyperDoc is a undefined structure that the client can use to put in necessary information of the graphical object the anchor represents when the object is loaded and in memory. Remember that it's only parent anchors that have a graphical object associated with them - not child anchors, see http://info.cern.ch/hypertext/WWW/Architecture/Anchors.html for more information on anchors. You can have a look at how the Line Mode Browser defines it in GridText.c. Here it is called HText, but it is the same as hyperdoc. -- cheers -- Henrik Frystyk
Received on Friday, 22 July 1994 13:12:04 UTC