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lynx/WWW/Library/Implementation/HTAnchor.c
Daniel Baumann 20df3659cf
Adding upstream version 2.9.2. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-21 08:10:34 +02:00

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/*
* $LynxId: HTAnchor.c,v 1.82 2020/01/21 21:58:52 tom Exp $
*
* Hypertext "Anchor" Object HTAnchor.c
* ==========================
*
* An anchor represents a region of a hypertext document which is linked to
* another anchor in the same or a different document.
*
* History
*
* Nov 1990 Written in Objective-C for the NeXT browser (TBL)
* 24-Oct-1991 (JFG), written in C, browser-independent
* 21-Nov-1991 (JFG), first complete version
*
* (c) Copyright CERN 1991 - See Copyright.html
*/
#define HASH_SIZE 997 /* Arbitrary prime. Memory/speed tradeoff */
#include <HTUtils.h>
#include <HTAnchor.h>
#include <HTParse.h>
#include <HTString.h>
#include <UCAux.h>
#include <UCMap.h>
#include <GridText.h>
#include <LYUtils.h>
#include <LYCharSets.h>
#include <LYUtils.h>
#include <LYLeaks.h>
#define HASH_OF(h, v) ((HASH_TYPE)((h) * 3 + UCH(v)) % HASH_SIZE)
static HASH_TYPE anchor_hash(const char *cp_address)
{
HASH_TYPE hash;
const char *p;
for (p = cp_address, hash = 0; *p; p++)
hash = HASH_OF(hash, *p);
return (hash);
}
typedef struct _HyperDoc Hyperdoc;
#ifdef VMS
struct _HyperDoc {
int junk; /* VMS cannot handle pointers to undefined structs */
};
#endif /* VMS */
/* Table of lists of all parents */
static HTList adult_table[HASH_SIZE] =
{
{NULL, NULL}};
/* Creation Methods
* ================
*
* Do not use "new" by itself outside this module. In order to enforce
* consistency, we insist that you furnish more information about the
* anchor you are creating : use newWithParent or newWithAddress.
*/
static HTParentAnchor0 *HTParentAnchor0_new(const char *address,
unsigned hash)
{
HTParentAnchor0 *newAnchor = typecalloc(HTParentAnchor0);
if (newAnchor == NULL)
outofmem(__FILE__, "HTParentAnchor0_new");
newAnchor->parent = newAnchor; /* self */
StrAllocCopy(newAnchor->address, address);
newAnchor->adult_hash = (HASH_TYPE) hash;
return (newAnchor);
}
static HTParentAnchor *HTParentAnchor_new(HTParentAnchor0 *parent)
{
HTParentAnchor *newAnchor = typecalloc(HTParentAnchor);
if (newAnchor == NULL)
outofmem(__FILE__, "HTParentAnchor_new");
newAnchor->parent = parent; /* cross reference */
parent->info = newAnchor; /* cross reference */
newAnchor->address = parent->address; /* copy pointer */
newAnchor->isISMAPScript = FALSE; /* Lynx appends ?0,0 if TRUE. - FM */
newAnchor->isHEAD = FALSE; /* HEAD request if TRUE. - FM */
newAnchor->safe = FALSE; /* Safe. - FM */
newAnchor->no_cache = FALSE; /* no-cache? - FM */
newAnchor->inBASE = FALSE; /* duplicated from HTML.c/h */
newAnchor->content_length = 0; /* Content-Length. - FM */
return (newAnchor);
}
static HTChildAnchor *HTChildAnchor_new(HTParentAnchor0 *parent)
{
HTChildAnchor *p = typecalloc(HTChildAnchor);
if (p == NULL)
outofmem(__FILE__, "HTChildAnchor_new");
p->parent = parent; /* parent reference */
return p;
}
static HTChildAnchor *HText_pool_ChildAnchor_new(HTParentAnchor *parent)
{
HTChildAnchor *p = (HTChildAnchor *) HText_pool_calloc((HText *) (parent->document),
(unsigned) sizeof(HTChildAnchor));
if (p == NULL)
outofmem(__FILE__, "HText_pool_ChildAnchor_new");
p->parent = parent->parent; /* parent reference */
return p;
}
#ifdef CASE_INSENSITIVE_ANCHORS
/* Case insensitive string comparison */
#define HT_EQUIV(a,b) (TOUPPER(a) == TOUPPER(b))
#else
/* Case sensitive string comparison */
#define HT_EQUIV(a,b) ((a) == (b))
#endif
/* Null-terminated string comparison
* ---------------------------------
* On entry,
* s Points to one string, null terminated
* t points to the other.
* On exit,
* returns YES if the strings are equivalent
* NO if they differ.
*/
static BOOL HTSEquivalent(const char *s,
const char *t)
{
if (s && t) { /* Make sure they point to something */
for (; *s && *t; s++, t++) {
if (!HT_EQUIV(*s, *t)) {
return (NO);
}
}
return (BOOL) (HT_EQUIV(*s, *t));
} else {
return (BOOL) (s == t); /* Two NULLs are equivalent, aren't they ? */
}
}
/* Binary string comparison
* ------------------------
* On entry,
* s Points to one bstring
* t points to the other.
* On exit,
* returns YES if the strings are equivalent
* NO if they differ.
*/
static BOOL HTBEquivalent(const bstring *s,
const bstring *t)
{
if (s && t && BStrLen(s) == BStrLen(t)) {
int j;
int len = BStrLen(s);
for (j = 0; j < len; ++j) {
if (!HT_EQUIV(BStrData(s)[j], BStrData(t)[j])) {
return (NO);
}
}
return (YES);
} else {
return (BOOL) (s == t); /* Two NULLs are equivalent, aren't they ? */
}
}
/*
* Three-way compare function
*/
static int compare_anchors(void *l,
void *r)
{
const char *a = ((HTChildAnchor *) l)->tag;
const char *b = ((HTChildAnchor *) r)->tag;
/* both tags are not NULL */
#ifdef CASE_INSENSITIVE_ANCHORS
return strcasecomp(a, b); /* Case insensitive */
#else
return strcmp(a, b); /* Case sensitive - FM */
#endif /* CASE_INSENSITIVE_ANCHORS */
}
/* Create new or find old sub-anchor
* ---------------------------------
*
* This one is for a named child.
* The parent anchor must already exist.
*/
static HTChildAnchor *HTAnchor_findNamedChild(HTParentAnchor0 *parent,
const char *tag)
{
HTChildAnchor *child;
if (parent && tag && *tag) { /* TBL */
if (parent->children) {
/*
* Parent has children. Search them.
*/
HTChildAnchor sample;
sample.tag = DeConst(tag); /* for compare_anchors() only */
child = (HTChildAnchor *) HTBTree_search(parent->children, &sample);
if (child != NULL) {
CTRACE((tfp,
"Child anchor %p of parent %p with name `%s' already exists.\n",
(void *) child, (void *) parent, tag));
return (child);
}
} else { /* parent doesn't have any children yet : create family */
parent->children = HTBTree_new(compare_anchors);
}
child = HTChildAnchor_new(parent);
CTRACE((tfp, "HTAnchor: New Anchor %p named `%s' is child of %p\n",
(void *) child,
NonNull(tag),
(void *) child->parent));
StrAllocCopy(child->tag, tag); /* should be set before HTBTree_add */
HTBTree_add(parent->children, child);
return (child);
} else {
CTRACE((tfp, "HTAnchor_findNamedChild called with NULL parent.\n"));
return (NULL);
}
}
/*
* This one is for a new unnamed child being edited into an existing
* document. The parent anchor and the document must already exist.
* (Just add new unnamed child).
*/
static HTChildAnchor *HTAnchor_addChild(HTParentAnchor *parent)
{
HTChildAnchor *child;
if (!parent) {
CTRACE((tfp, "HTAnchor_addChild called with NULL parent.\n"));
return (NULL);
}
child = HText_pool_ChildAnchor_new(parent);
CTRACE((tfp, "HTAnchor: New unnamed Anchor %p is child of %p\n",
(void *) child,
(void *) child->parent));
child->tag = 0;
HTList_linkObject(&parent->children_notag, child, &child->_add_children_notag);
return (child);
}
static HTParentAnchor0 *HTAnchor_findAddress_in_adult_table(const DocAddress *newdoc);
static BOOL HTAnchor_link(HTChildAnchor *child,
HTAnchor * destination,
HTLinkType *type);
/* Create or find a child anchor with a possible link
* --------------------------------------------------
*
* Create new anchor with a given parent and possibly
* a name, and possibly a link to a _relatively_ named anchor.
* (Code originally in ParseHTML.h)
*/
HTChildAnchor *HTAnchor_findChildAndLink(HTParentAnchor *parent, /* May not be 0 */
const char *tag, /* May be "" or 0 */
const char *href, /* May be "" or 0 */
HTLinkType *ltype) /* May be 0 */
{
HTChildAnchor *child;
CTRACE((tfp, "Entered HTAnchor_findChildAndLink: tag=`%s',%s href=`%s'\n",
NonNull(tag),
(ltype == HTInternalLink) ? " (internal link)" : "",
NonNull(href)));
if (parent == 0) {
child = 0;
} else {
if (non_empty(tag)) {
child = HTAnchor_findNamedChild(parent->parent, tag);
} else {
child = HTAnchor_addChild(parent);
}
if (non_empty(href)) {
const char *fragment = NULL;
HTParentAnchor0 *dest;
if (ltype == HTInternalLink && *href == '#') {
dest = parent->parent;
} else {
const char *relative_to = ((parent->inBASE && *href != '#')
? parent->content_base
: parent->address);
DocAddress parsed_doc;
parsed_doc.address = HTParse(href, relative_to,
PARSE_ALL_WITHOUT_ANCHOR);
parsed_doc.post_data = NULL;
parsed_doc.post_content_type = NULL;
if (ltype && parent->post_data && ltype == HTInternalLink) {
/* for internal links, find a destination with the same
post data if the source of the link has post data. - kw
Example: LYNXIMGMAP: */
parsed_doc.post_data = parent->post_data;
parsed_doc.post_content_type = parent->post_content_type;
}
parsed_doc.bookmark = NULL;
parsed_doc.isHEAD = FALSE;
parsed_doc.safe = FALSE;
dest = HTAnchor_findAddress_in_adult_table(&parsed_doc);
FREE(parsed_doc.address);
}
/*
* [from HTAnchor_findAddress()]
* If the address represents a sub-anchor, we load its parent (above),
* then we create a named child anchor within that parent.
*/
fragment = (*href == '#') ? href + 1 : HTParseAnchor(href);
if (*fragment)
dest = (HTParentAnchor0 *) HTAnchor_findNamedChild(dest, fragment);
if (tag && *tag) {
if (child->dest) { /* DUPLICATE_ANCHOR_NAME_WORKAROUND - kw */
CTRACE((tfp,
"*** Duplicate ChildAnchor %p named `%s'",
(void *) child, tag));
if ((HTAnchor *) dest != child->dest || ltype != child->type) {
CTRACE((tfp,
", different dest %p or type, creating unnamed child\n",
(void *) child->dest));
child = HTAnchor_addChild(parent);
}
}
}
HTAnchor_link(child, (HTAnchor *) dest, ltype);
}
}
return child;
}
/* Create new or find old parent anchor
* ------------------------------------
*
* Me one is for a reference which is found in a document, and might
* not be already loaded.
* Note: You are not guaranteed a new anchor -- you might get an old one,
* like with fonts.
*/
HTParentAnchor *HTAnchor_findAddress(const DocAddress *newdoc)
{
/* Anchor tag specified ? */
const char *tag = HTParseAnchor(newdoc->address);
CTRACE((tfp, "Entered HTAnchor_findAddress\n"));
/*
* If the address represents a sub-anchor, we load its parent, then we
* create a named child anchor within that parent.
*/
if (*tag) {
DocAddress parsed_doc;
HTParentAnchor0 *foundParent;
parsed_doc.address = HTParse(newdoc->address, "",
PARSE_ALL_WITHOUT_ANCHOR);
parsed_doc.post_data = newdoc->post_data;
parsed_doc.post_content_type = newdoc->post_content_type;
parsed_doc.bookmark = newdoc->bookmark;
parsed_doc.isHEAD = newdoc->isHEAD;
parsed_doc.safe = newdoc->safe;
foundParent = HTAnchor_findAddress_in_adult_table(&parsed_doc);
(void) HTAnchor_findNamedChild(foundParent, tag);
FREE(parsed_doc.address);
return HTAnchor_parent((HTAnchor *) foundParent);
}
return HTAnchor_parent((HTAnchor *) HTAnchor_findAddress_in_adult_table(newdoc));
}
/* The address has no anchor tag, for sure.
*/
static HTParentAnchor0 *HTAnchor_findAddress_in_adult_table(const DocAddress *newdoc)
{
/*
* Check whether we have this node.
*/
HASH_TYPE hash;
HTList *adults;
HTList *grownups;
HTParentAnchor0 *foundAnchor;
BOOL need_extra_info = (BOOL) (newdoc->post_data ||
newdoc->post_content_type ||
newdoc->bookmark ||
newdoc->isHEAD ||
newdoc->safe);
/*
* We need not free adult_table[] atexit - it should be perfectly empty
* after free'ing all HText's. (There is an error if it is not empty at
* exit). -LP
*/
/*
* Select list from hash table,
*/
hash = anchor_hash(newdoc->address);
adults = &(adult_table[hash]);
/*
* Search list for anchor.
*/
grownups = adults;
while (NULL != (foundAnchor =
(HTParentAnchor0 *) HTList_nextObject(grownups))) {
if (HTSEquivalent(foundAnchor->address, newdoc->address) &&
((!foundAnchor->info && !need_extra_info) ||
(foundAnchor->info &&
HTBEquivalent(foundAnchor->info->post_data, newdoc->post_data) &&
foundAnchor->info->isHEAD == newdoc->isHEAD))) {
CTRACE((tfp, "Anchor %p with address `%s' already exists.\n",
(void *) foundAnchor, newdoc->address));
return foundAnchor;
}
}
/*
* Node not found: create new anchor.
*/
foundAnchor = HTParentAnchor0_new(newdoc->address, hash);
CTRACE((tfp, "New anchor %p has hash %d and address `%s'\n",
(void *) foundAnchor, hash, newdoc->address));
if (need_extra_info) {
/* rare case, create a big structure */
HTParentAnchor *p = HTParentAnchor_new(foundAnchor);
if (newdoc->post_data)
BStrCopy(p->post_data, newdoc->post_data);
if (newdoc->post_content_type)
StrAllocCopy(p->post_content_type,
newdoc->post_content_type);
if (newdoc->bookmark)
StrAllocCopy(p->bookmark, newdoc->bookmark);
p->isHEAD = newdoc->isHEAD;
p->safe = newdoc->safe;
}
HTList_linkObject(adults, foundAnchor, &foundAnchor->_add_adult);
return foundAnchor;
}
/* Create new or find old named anchor - simple form
* -------------------------------------------------
*
* Like HTAnchor_findAddress, but simpler to use for simple cases.
* No post data etc. can be supplied. - kw
*/
HTParentAnchor *HTAnchor_findSimpleAddress(const char *url)
{
DocAddress urldoc;
urldoc.address = DeConst(url); /* ignore warning, it IS treated like const - kw */
urldoc.post_data = NULL;
urldoc.post_content_type = NULL;
urldoc.bookmark = NULL;
urldoc.isHEAD = FALSE;
urldoc.safe = FALSE;
return HTAnchor_findAddress(&urldoc);
}
/* Link me Anchor to another given one
* -------------------------------------
*/
static BOOL HTAnchor_link(HTChildAnchor *child,
HTAnchor * destination,
HTLinkType *type)
{
if (!(child && destination))
return (NO); /* Can't link to/from non-existing anchor */
CTRACE((tfp, "Linking child %p to anchor %p\n", (void *) child, (void *) destination));
if (child->dest) {
CTRACE((tfp, "*** child anchor already has destination, exiting!\n"));
return (NO);
}
child->dest = destination;
child->type = type;
if (child->parent != destination->parent)
/* link only foreign children */
HTList_linkObject(&destination->parent->sources, child, &child->_add_sources);
return (YES); /* Success */
}
/* Delete an anchor and possibly related things (auto garbage collection)
* --------------------------------------------
*
* The anchor is only deleted if the corresponding document is not loaded.
* All outgoing links from children are deleted, and children are
* removed from the sources lists of theirs targets.
* We also try to delete the targets whose documents are not loaded.
* If this anchor's sources list is empty, we delete it and its children.
*/
/*
* Recursively try to delete destination anchor of this child.
* In any event, this will tell destination anchor that we
* no longer consider it a destination.
*/
static void deleteLinks(HTChildAnchor *me)
{
/*
* Unregister me with our destination anchor's parent.
*/
if (me->dest) {
HTParentAnchor0 *parent = me->dest->parent;
/*
* Start. Set the dest pointer to zero.
*/
me->dest = NULL;
/*
* Remove me from the parent's sources so that the parent knows one
* less anchor is its dest.
*/
if ((me->parent != parent) && !HTList_isEmpty(&parent->sources)) {
/*
* Really should only need to deregister once.
*/
HTList_unlinkObject(&parent->sources, (void *) me);
}
/*
* Recursive call. Test here to avoid calling overhead. Don't delete
* if document is loaded or being loaded.
*/
if ((me->parent != parent) &&
parent != NULL &&
!parent->underway &&
(!parent->info || !parent->info->document)) {
HTAnchor_delete(parent);
}
/*
* At this point, we haven't a destination. Set it to be so. Leave
* the HTAtom pointed to by type up to other code to handle (reusable,
* near static).
*/
me->type = NULL;
}
}
static void HTParentAnchor_free(HTParentAnchor *me);
BOOL HTAnchor_delete(HTParentAnchor0 *me)
{
/*
* Memory leaks fixed.
* 05-27-94 Lynx 2-3-1 Garrett Arch Blythe
*/
HTBTElement *ele;
HTChildAnchor *child;
/*
* Do nothing if nothing to do.
*/
if (!me) {
return (NO);
}
/*
* Don't delete if document is loaded or being loaded.
*/
if (me->underway || (me->info && me->info->document)) {
return (NO);
}
/*
* Mark ourselves busy, so that recursive calls of this function on this
* HTParentAnchor0 will not free it from under our feet. - kw
*/
me->underway = TRUE;
{
/*
* Delete all outgoing links from named children. Do not delete named
* children itself (may have incoming links).
*/
if (me->children) {
ele = HTBTree_next(me->children, NULL);
while (ele != NULL) {
child = (HTChildAnchor *) HTBTree_object(ele);
if (child->dest)
deleteLinks(child);
ele = HTBTree_next(me->children, ele);
}
}
}
me->underway = FALSE;
/*
* There are still incoming links to this one (we are the
* destination of another anchor).
*/
if (!HTList_isEmpty(&me->sources)) {
/*
* Can't delete parent, still have sources.
*/
return (NO);
}
/*
* No more incoming and outgoing links : kill everything First, delete
* named children.
*/
if (me->children) {
ele = HTBTree_next(me->children, NULL);
while (ele != NULL) {
child = (HTChildAnchor *) HTBTree_object(ele);
FREE(child->tag);
FREE(child);
ele = HTBTree_next(me->children, ele);
}
HTBTree_free(me->children);
}
/*
* Delete the ParentAnchor, if any. (Document was already deleted).
*/
if (me->info) {
HTParentAnchor_free(me->info);
FREE(me->info);
}
/*
* Remove ourselves from the hash table's list.
*/
HTList_unlinkObject(&(adult_table[me->adult_hash]), (void *) me);
/*
* Free the address.
*/
FREE(me->address);
/*
* Finally, kill the parent anchor passed in.
*/
FREE(me);
return (YES);
}
/*
* Unnamed children (children_notag) have no sense without HText - delete them
* and their links if we are about to free HText. Document currently exists.
* Called within HText_free().
*/
void HTAnchor_delete_links(HTParentAnchor *me)
{
HTList *cur;
HTChildAnchor *child;
/*
* Do nothing if nothing to do.
*/
if (!me || !me->document) {
return;
}
/*
* Mark ourselves busy, so that recursive calls on this HTParentAnchor0
* will not free it from under our feet. - kw
*/
me->parent->underway = TRUE;
/*
* Delete all outgoing links from unnamed children.
*/
if (!HTList_isEmpty(&me->children_notag)) {
cur = &me->children_notag;
while ((child =
(HTChildAnchor *) HTList_unlinkLastObject(cur)) != 0) {
deleteLinks(child);
/* child allocated in HText pool, HText_free() will free it later */
}
}
me->parent->underway = FALSE;
}
static void HTParentAnchor_free(HTParentAnchor *me)
{
/*
* Delete the methods list.
*/
if (me->methods) {
/*
* Leave what the methods point to up in memory for other code (near
* static stuff).
*/
HTList_delete(me->methods);
me->methods = NULL;
}
/*
* Free up all allocated members.
*/
FREE(me->charset);
FREE(me->isIndexAction);
FREE(me->isIndexPrompt);
FREE(me->title);
FREE(me->physical);
BStrFree(me->post_data);
FREE(me->post_content_type);
FREE(me->bookmark);
FREE(me->owner);
FREE(me->RevTitle);
FREE(me->citehost);
#ifdef USE_SOURCE_CACHE
HTAnchor_clearSourceCache(me);
#endif
if (me->FileCache) {
FILE *fd;
if ((fd = fopen(me->FileCache, "r")) != NULL) {
fclose(fd);
(void) remove(me->FileCache);
}
FREE(me->FileCache);
}
FREE(me->SugFname);
FREE(me->cache_control);
HTChunkClear(&(me->http_headers));
FREE(me->content_type_params);
FREE(me->content_type);
FREE(me->content_language);
FREE(me->content_encoding);
FREE(me->content_base);
FREE(me->content_disposition);
FREE(me->content_location);
FREE(me->content_md5);
FREE(me->message_id);
FREE(me->subject);
FREE(me->date);
FREE(me->expires);
FREE(me->last_modified);
FREE(me->ETag);
FREE(me->server);
#ifdef USE_COLOR_STYLE
FREE(me->style);
#endif
/*
* Original code wanted a way to clean out the HTFormat if no longer needed
* (ref count?). I'll leave it alone since those HTAtom objects are a
* little harder to know where they are being referenced all at one time.
* (near static)
*/
FREE(me->UCStages);
ImageMapList_free(me->imaps);
}
#ifdef USE_SOURCE_CACHE
void HTAnchor_clearSourceCache(HTParentAnchor *me)
{
/*
* Clean up the source cache, if any.
*/
if (me->source_cache_file) {
CTRACE((tfp, "SourceCache: Removing file %s\n",
me->source_cache_file));
(void) LYRemoveTemp(me->source_cache_file);
FREE(me->source_cache_file);
}
if (me->source_cache_chunk) {
CTRACE((tfp, "SourceCache: Removing memory chunk %p\n",
(void *) me->source_cache_chunk));
HTChunkFree(me->source_cache_chunk);
me->source_cache_chunk = NULL;
}
}
#endif /* USE_SOURCE_CACHE */
/* Data access functions
* ---------------------
*/
HTParentAnchor *HTAnchor_parent(HTAnchor * me)
{
if (!me)
return NULL;
if (me->parent->info)
return me->parent->info;
/* else: create a new structure */
return HTParentAnchor_new(me->parent);
}
void HTAnchor_setDocument(HTParentAnchor *me,
HyperDoc *doc)
{
if (me)
me->document = doc;
}
HyperDoc *HTAnchor_document(HTParentAnchor *me)
{
return (me ? me->document : NULL);
}
char *HTAnchor_address(HTAnchor * me)
{
char *addr = NULL;
if (me) {
if (((HTParentAnchor0 *) me == me->parent) ||
((HTParentAnchor *) me == me->parent->info) ||
!((HTChildAnchor *) me)->tag) { /* it's an adult or no tag */
StrAllocCopy(addr, me->parent->address);
} else { /* it's a named child */
HTSprintf0(&addr, "%s#%s",
me->parent->address, ((HTChildAnchor *) me)->tag);
}
}
return (addr);
}
char *HTAnchor_short_address(HTAnchor * me)
{
const char chop[] = "file://localhost/";
char *addr = HTAnchor_address(me);
if (!strncmp(addr, chop, sizeof(chop) - 1)) {
char *a = addr + 7;
char *b = addr + sizeof(chop) - 2;
while ((*a++ = *b++) != '\0') {
;
}
}
return addr;
}
void HTAnchor_setFormat(HTParentAnchor *me,
HTFormat form)
{
if (me)
me->format = form;
}
HTFormat HTAnchor_format(HTParentAnchor *me)
{
return (me ? me->format : NULL);
}
void HTAnchor_setIndex(HTParentAnchor *me,
const char *address)
{
if (me) {
me->isIndex = YES;
StrAllocCopy(me->isIndexAction, address);
}
}
void HTAnchor_setPrompt(HTParentAnchor *me,
const char *prompt)
{
if (me) {
StrAllocCopy(me->isIndexPrompt, prompt);
}
}
BOOL HTAnchor_isIndex(HTParentAnchor *me)
{
return (BOOL) (me
? me->isIndex
: NO);
}
/* Whether Anchor has been designated as an ISMAP link
* (normally by presence of an ISMAP attribute on A or IMG) - KW
*/
BOOL HTAnchor_isISMAPScript(HTAnchor * me)
{
return (BOOL) ((me && me->parent->info)
? me->parent->info->isISMAPScript
: NO);
}
#if defined(USE_COLOR_STYLE)
/* Style handling.
*/
const char *HTAnchor_style(HTParentAnchor *me)
{
return (me ? me->style : NULL);
}
void HTAnchor_setStyle(HTParentAnchor *me,
const char *style)
{
if (me) {
StrAllocCopy(me->style, style);
}
}
#endif
/* Title handling.
*/
const char *HTAnchor_title(HTParentAnchor *me)
{
return (me ? me->title : NULL);
}
void HTAnchor_setTitle(HTParentAnchor *me,
const char *title)
{
int i;
if (me) {
if (title) {
StrAllocCopy(me->title, title);
for (i = 0; me->title[i]; i++) {
if (UCH(me->title[i]) == 1 ||
UCH(me->title[i]) == 2) {
me->title[i] = ' ';
}
}
} else {
CTRACE((tfp, "HTAnchor_setTitle: New title is NULL! "));
if (me->title) {
CTRACE((tfp, "Old title was \"%s\".\n", me->title));
FREE(me->title);
} else {
CTRACE((tfp, "Old title was NULL.\n"));
}
}
}
}
void HTAnchor_appendTitle(HTParentAnchor *me,
const char *title)
{
int i;
if (me) {
StrAllocCat(me->title, title);
for (i = 0; me->title[i]; i++) {
if (UCH(me->title[i]) == 1 ||
UCH(me->title[i]) == 2) {
me->title[i] = ' ';
}
}
}
}
/* Bookmark handling.
*/
const char *HTAnchor_bookmark(HTParentAnchor *me)
{
return (me ? me->bookmark : NULL);
}
void HTAnchor_setBookmark(HTParentAnchor *me,
const char *bookmark)
{
if (me)
StrAllocCopy(me->bookmark, bookmark);
}
/* Owner handling.
*/
const char *HTAnchor_owner(HTParentAnchor *me)
{
return (me ? me->owner : NULL);
}
void HTAnchor_setOwner(HTParentAnchor *me,
const char *owner)
{
if (me) {
StrAllocCopy(me->owner, owner);
}
}
/* TITLE handling in LINKs with REV="made" or REV="owner". - FM
*/
const char *HTAnchor_RevTitle(HTParentAnchor *me)
{
return (me ? me->RevTitle : NULL);
}
void HTAnchor_setRevTitle(HTParentAnchor *me,
const char *title)
{
int i;
if (me) {
StrAllocCopy(me->RevTitle, title);
for (i = 0; me->RevTitle[i]; i++) {
if (UCH(me->RevTitle[i]) == 1 ||
UCH(me->RevTitle[i]) == 2) {
me->RevTitle[i] = ' ';
}
}
}
}
#ifndef DISABLE_BIBP
/* Citehost for bibp links from LINKs with REL="citehost". - RDC
*/
const char *HTAnchor_citehost(HTParentAnchor *me)
{
return (me ? me->citehost : NULL);
}
void HTAnchor_setCitehost(HTParentAnchor *me,
const char *citehost)
{
if (me) {
StrAllocCopy(me->citehost, citehost);
}
}
#endif /* !DISABLE_BIBP */
/* Suggested filename handling. - FM
* (will be loaded if we had a Content-Disposition
* header or META element with filename=name.suffix)
*/
const char *HTAnchor_SugFname(HTParentAnchor *me)
{
return (me ? me->SugFname : NULL);
}
/* HTTP Headers.
*/
const char *HTAnchor_http_headers(HTParentAnchor *me)
{
return (me ? me->http_headers.data : NULL);
}
/* Content-Type handling (parameter list).
*/
const char *HTAnchor_content_type_params(HTParentAnchor *me)
{
return (me ? me->content_type_params : NULL);
}
/* Content-Encoding handling. - FM
* (will be loaded if we had a Content-Encoding
* header.)
*/
const char *HTAnchor_content_encoding(HTParentAnchor *me)
{
return (me ? me->content_encoding : NULL);
}
/* Content-Type handling. - FM
*/
const char *HTAnchor_content_type(HTParentAnchor *me)
{
return (me ? me->content_type : NULL);
}
/* Last-Modified header handling. - FM
*/
const char *HTAnchor_last_modified(HTParentAnchor *me)
{
return (me ? me->last_modified : NULL);
}
/* Date header handling. - FM
*/
const char *HTAnchor_date(HTParentAnchor *me)
{
return (me ? me->date : NULL);
}
/* Server header handling. - FM
*/
const char *HTAnchor_server(HTParentAnchor *me)
{
return (me ? me->server : NULL);
}
/* Safe header handling. - FM
*/
BOOL HTAnchor_safe(HTParentAnchor *me)
{
return (BOOL) (me ? me->safe : FALSE);
}
/* Content-Base header handling. - FM
*/
const char *HTAnchor_content_base(HTParentAnchor *me)
{
return (me ? me->content_base : NULL);
}
/* Content-Location header handling. - FM
*/
const char *HTAnchor_content_location(HTParentAnchor *me)
{
return (me ? me->content_location : NULL);
}
/* Message-ID, used for mail replies - kw
*/
const char *HTAnchor_messageID(HTParentAnchor *me)
{
return (me ? me->message_id : NULL);
}
BOOL HTAnchor_setMessageID(HTParentAnchor *me,
const char *messageid)
{
if (!(me && messageid && *messageid)) {
return FALSE;
}
StrAllocCopy(me->message_id, messageid);
return TRUE;
}
/* Subject, used for mail replies - kw
*/
const char *HTAnchor_subject(HTParentAnchor *me)
{
return (me ? me->subject : NULL);
}
BOOL HTAnchor_setSubject(HTParentAnchor *me,
const char *subject)
{
if (!(me && subject && *subject)) {
return FALSE;
}
StrAllocCopy(me->subject, subject);
return TRUE;
}
/* Manipulation of links
* ---------------------
*/
HTAnchor *HTAnchor_followLink(HTChildAnchor *me)
{
return (me->dest);
}
HTAnchor *HTAnchor_followTypedLink(HTChildAnchor *me,
HTLinkType *type)
{
if (me->type == type)
return (me->dest);
return (NULL); /* No link of me type */
}
/* Methods List
* ------------
*/
HTList *HTAnchor_methods(HTParentAnchor *me)
{
if (!me->methods) {
me->methods = HTList_new();
}
return (me->methods);
}
/* Protocol
* --------
*/
void *HTAnchor_protocol(HTParentAnchor *me)
{
return (me->protocol);
}
void HTAnchor_setProtocol(HTParentAnchor *me,
void *protocol)
{
me->protocol = protocol;
}
/* Physical Address
* ----------------
*/
char *HTAnchor_physical(HTParentAnchor *me)
{
return (me->physical);
}
void HTAnchor_setPhysical(HTParentAnchor *me,
char *physical)
{
if (me) {
StrAllocCopy(me->physical, physical);
}
}
#ifdef DEBUG
static void show_stages(HTParentAnchor *me, const char *tag, int which_stage)
{
int j;
CTRACE((tfp, "Stages %s*%s", NonNull(me->charset), tag));
for (j = 0; j < UCT_STAGEMAX; j++) {
CTRACE((tfp, " "));
if (j == which_stage)
CTRACE((tfp, "("));
CTRACE((tfp, "%d:%d:%s",
j,
me->UCStages->s[j].LYhndl,
NonNull(me->UCStages->s[j].C.MIMEname)));
if (j == which_stage)
CTRACE((tfp, ")"));
}
CTRACE((tfp, "\n"));
}
#else
#define show_stages(me,tag,which_stage) /* nothing */
#endif
/*
* We store charset info in the HTParentAnchor object, for several
* "stages". (See UCDefs.h)
* A stream method is supposed to know what stage in the model it is.
*
* General model MIME -> parser -> structured -> HText
* e.g., text/html
* from HTTP: HTMIME.c -> SGML.c -> HTML.c -> GridText.c
* text/plain
* from file: HTFile.c -> HTPlain.c -> GridText.c
*
* The lock/set_by is used to lock e.g. a charset set by an explicit
* HTTP MIME header against overriding by a HTML META tag - the MIME
* header has higher priority. Defaults (from -assume_.. options etc.)
* will not override charset explicitly given by server.
*
* Some advantages of keeping this in the HTAnchor:
* - Global variables are bad.
* - Can remember a charset given by META tag when toggling to SOURCE view.
* - Can remember a charset given by <A CHARSET=...> href in another doc.
*
* We don't modify the HTParentAnchor's charset element
* here, that one will only be set when explicitly given.
*/
LYUCcharset *HTAnchor_getUCInfoStage(HTParentAnchor *me,
int which_stage)
{
LYUCcharset *result = NULL;
if (me) {
if (!me->UCStages) {
int i;
int chndl = UCLYhndl_for_unspec; /* always >= 0 */
UCAnchorInfo *stages = typecalloc(UCAnchorInfo);
if (stages == NULL)
outofmem(__FILE__, "HTAnchor_getUCInfoStage");
for (i = 0; i < UCT_STAGEMAX; i++) {
stages->s[i].C.MIMEname = "";
stages->s[i].LYhndl = -1;
}
if (me->charset) {
chndl = UCGetLYhndl_byMIME(me->charset);
if (chndl < 0)
chndl = UCLYhndl_for_unrec;
if (chndl < 0)
/*
* UCLYhndl_for_unrec not defined :-(
* fallback to UCLYhndl_for_unspec which always valid.
*/
chndl = UCLYhndl_for_unspec; /* always >= 0 */
}
MemCpy(&stages->s[UCT_STAGE_MIME].C, &LYCharSet_UC[chndl],
sizeof(LYUCcharset));
stages->s[UCT_STAGE_MIME].lock = UCT_SETBY_DEFAULT;
stages->s[UCT_STAGE_MIME].LYhndl = chndl;
me->UCStages = stages;
}
result = (&me->UCStages->s[which_stage].C);
show_stages(me, "_getUCInfoStage", which_stage);
}
return (result);
}
int HTAnchor_getUCLYhndl(HTParentAnchor *me,
int which_stage)
{
if (me) {
if (!me->UCStages) {
/*
* This will allocate and initialize, if not yet done.
*/
(void) HTAnchor_getUCInfoStage(me, which_stage);
}
if (me->UCStages->s[which_stage].lock > UCT_SETBY_NONE) {
return (me->UCStages->s[which_stage].LYhndl);
}
}
return (-1);
}
#ifdef CAN_SWITCH_DISPLAY_CHARSET
static void setup_switch_display_charset(HTParentAnchor *me, int h)
{
if (!Switch_Display_Charset(h, SWITCH_DISPLAY_CHARSET_MAYBE))
return;
HTAnchor_setUCInfoStage(me, current_char_set,
UCT_STAGE_HTEXT, UCT_SETBY_MIME); /* highest priority! */
HTAnchor_setUCInfoStage(me, current_char_set,
UCT_STAGE_STRUCTURED, UCT_SETBY_MIME); /* highest priority! */
CTRACE((tfp,
"changing UCInfoStage: HTEXT/STRUCTURED stages charset='%s'.\n",
LYCharSet_UC[current_char_set].MIMEname));
}
#endif
LYUCcharset *HTAnchor_setUCInfoStage(HTParentAnchor *me,
int LYhndl,
int which_stage,
int set_by)
{
if (me) {
/*
* This will allocate and initialize, if not yet done.
*/
LYUCcharset *p = HTAnchor_getUCInfoStage(me, which_stage);
/*
* Can we override?
*/
if (set_by >= me->UCStages->s[which_stage].lock) {
#ifdef CAN_SWITCH_DISPLAY_CHARSET
int ohandle = me->UCStages->s[which_stage].LYhndl;
#endif
me->UCStages->s[which_stage].lock = set_by;
me->UCStages->s[which_stage].LYhndl = LYhndl;
if (LYhndl >= 0) {
MemCpy(p, &LYCharSet_UC[LYhndl], sizeof(LYUCcharset));
#ifdef CAN_SWITCH_DISPLAY_CHARSET
/* Allow a switch to a more suitable display charset */
if (LYhndl != ohandle && which_stage == UCT_STAGE_PARSER)
setup_switch_display_charset(me, LYhndl);
#endif
} else {
p->UChndl = -1;
}
show_stages(me, "_setUCInfoStage", which_stage);
return (p);
}
}
return (NULL);
}
LYUCcharset *HTAnchor_resetUCInfoStage(HTParentAnchor *me,
int LYhndl,
int which_stage,
int set_by)
{
LYUCcharset *result = NULL;
int ohandle;
if (me && me->UCStages) {
me->UCStages->s[which_stage].lock = set_by;
ohandle = me->UCStages->s[which_stage].LYhndl;
me->UCStages->s[which_stage].LYhndl = LYhndl;
#ifdef CAN_SWITCH_DISPLAY_CHARSET
/* Allow a switch to a more suitable display charset */
if (LYhndl >= 0 && LYhndl != ohandle
&& which_stage == UCT_STAGE_PARSER)
setup_switch_display_charset(me, LYhndl);
#else
(void) ohandle;
#endif
show_stages(me, "_resetUCInfoStage", which_stage);
result = (&me->UCStages->s[which_stage].C);
}
return result;
}
/*
* A set_by of (-1) means use the lock value from the from_stage.
*/
LYUCcharset *HTAnchor_copyUCInfoStage(HTParentAnchor *me,
int to_stage,
int from_stage,
int set_by)
{
if (me) {
/*
* This will allocate and initialize, if not yet done.
*/
LYUCcharset *p_from = HTAnchor_getUCInfoStage(me, from_stage);
LYUCcharset *p_to = HTAnchor_getUCInfoStage(me, to_stage);
/*
* Can we override?
*/
if (set_by == -1)
set_by = me->UCStages->s[from_stage].lock;
if (set_by == UCT_SETBY_NONE)
set_by = UCT_SETBY_DEFAULT;
if (set_by >= me->UCStages->s[to_stage].lock) {
#ifdef CAN_SWITCH_DISPLAY_CHARSET
int ohandle = me->UCStages->s[to_stage].LYhndl;
#endif
me->UCStages->s[to_stage].lock = set_by;
me->UCStages->s[to_stage].LYhndl =
me->UCStages->s[from_stage].LYhndl;
#ifdef CAN_SWITCH_DISPLAY_CHARSET
/* Allow a switch to a more suitable display charset */
if (me->UCStages->s[to_stage].LYhndl >= 0
&& me->UCStages->s[to_stage].LYhndl != ohandle
&& to_stage == UCT_STAGE_PARSER)
setup_switch_display_charset(me,
me->UCStages->s[to_stage].LYhndl);
#endif
if (p_to != p_from)
MemCpy(p_to, p_from, sizeof(LYUCcharset));
return (p_to);
}
}
return (NULL);
}
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