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Diffstat (limited to '')
| -rw-r--r-- | WWW/Library/Implementation/HTAnchor.c | 1460 |
1 files changed, 1460 insertions, 0 deletions
diff --git a/WWW/Library/Implementation/HTAnchor.c b/WWW/Library/Implementation/HTAnchor.c new file mode 100644 index 0000000..ee983a7 --- /dev/null +++ b/WWW/Library/Implementation/HTAnchor.c @@ -0,0 +1,1460 @@ +/* + * $LynxId: HTAnchor.c,v 1.81 2018/03/11 18:34:50 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 sence 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 priorty! */ + HTAnchor_setUCInfoStage(me, current_char_set, + UCT_STAGE_STRUCTURED, UCT_SETBY_MIME); /* highest priorty! */ + 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); +} |