fz_link *
pdf_load_link_annots(pdf_document *xref, pdf_obj *annots, fz_matrix page_ctm)
{
fz_link *link, *head, *tail;
pdf_obj *obj;
int i, n;
head = tail = NULL;
link = NULL;
n = pdf_array_len(annots);
for (i = 0; i < n; i++)
{
obj = pdf_array_get(annots, i);
link = pdf_load_link(xref, obj, page_ctm);
if (link)
{
if (!head)
head = tail = link;
else
{
tail->next = link;
tail = link;
}
}
}
return head;
}
void
pdf_load_links(pdf_link **linkp, pdf_xref *xref, fz_obj *annots)
{
pdf_link *link, *head, *tail;
fz_obj *obj;
int i;
fz_context *ctx = xref->ctx;
head = tail = NULL;
link = NULL;
for (i = 0; i < fz_array_len(ctx, annots); i++)
{
obj = fz_array_get(ctx, annots, i);
link = pdf_load_link(xref, obj);
if (link)
{
if (!head)
head = tail = link;
else
{
tail->next = link;
tail = link;
}
}
}
*linkp = head;
}
fz_link *
pdf_load_link_annots(fz_context *ctx, pdf_document *doc, pdf_obj *annots, int pagenum, const fz_matrix *page_ctm)
{
fz_link *link, *head, *tail;
pdf_obj *obj;
int i, n;
head = tail = NULL;
link = NULL;
n = pdf_array_len(ctx, annots);
for (i = 0; i < n; i++)
{
/* FIXME: Move the try/catch out of the loop for performance? */
fz_try(ctx)
{
obj = pdf_array_get(ctx, annots, i);
link = pdf_load_link(ctx, doc, obj, pagenum, page_ctm);
}
fz_catch(ctx)
{
fz_rethrow_if(ctx, FZ_ERROR_TRYLATER);
link = NULL;
}
if (link)
{
if (!head)
head = tail = link;
else
{
tail->next = link;
tail = link;
}
}
}
return head;
}
static fz_outline *
pdf_load_outline_imp(pdf_xref *xref, fz_obj *dict)
{
pdf_link *link;
fz_outline *node;
fz_obj *obj;
/* SumatraPDF: prevent potential stack overflow */
fz_outline *prev, *root = NULL;
fz_obj *origDict = dict;
fz_context *ctx = xref->ctx;
if (fz_is_null(ctx, dict))
return NULL;
/* SumatraPDF: prevent cyclic outlines */
do
{
if (fz_dict_gets(ctx, dict, ".seen"))
break;
obj = fz_new_null(ctx);
fz_dict_puts(ctx, dict, ".seen", obj);
fz_drop_obj(ctx, obj);
node = fz_malloc(ctx, sizeof(fz_outline));
node->title = NULL;
node->page = -1;
node->down = NULL;
node->next = NULL;
obj = fz_dict_gets(ctx, dict, "Title");
if (obj)
node->title = pdf_to_utf8(ctx, obj);
/* SumatraPDF: support expansion states */
node->is_open = fz_to_int(ctx, fz_dict_gets(ctx, dict, "Count")) >= 0;
/* SumatraPDF: extended outline actions */
node->data = node->free_data = NULL;
if (fz_dict_gets(ctx, dict, "Dest") || fz_dict_gets(ctx, dict, "A"))
{
link = pdf_load_link(xref, dict);
if (link) /* SumatraPDF: don't crash if it's no link after all */
{
if (link->kind == PDF_LINK_GOTO)
node->page = pdf_find_page_number(xref, fz_array_get(ctx, link->dest, 0));
/* SumatraPDF: extended outline actions */
node->data = link;
node->free_data = pdf_free_link;
}
}
obj = fz_dict_gets(ctx, dict, "First");
if (obj)
node->down = pdf_load_outline_imp(xref, obj);
/* SumatraPDF: prevent potential stack overflow */
if (!root)
prev = root = node;
else
prev = prev->next = node;
dict = fz_dict_gets(ctx, dict, "Next");
} while (dict && !fz_is_null(ctx, dict));
node = root;
/* SumatraPDF: prevent cyclic outlines */
for (dict = origDict; dict && fz_dict_gets(ctx, dict, ".seen"); dict = fz_dict_gets(ctx, dict, "Next"))
fz_dict_dels(ctx, dict, ".seen");
return node;
}