static mume_rect_t _pdf_doc_get_link_dest_rect(
struct _pdf_doc *self, pdf_link *link)
{
mume_rect_t rect = mume_rect_empty;
fz_obj *dest = link->dest;
fz_obj *obj = fz_array_get(dest, 1);
const char *type = fz_to_name(obj);
if (strcmp(type, "XYZ") == 0) {
/* NULL values for the coordinates mean: keep the
* current position. */
if (!fz_is_null(fz_array_get(dest, 2)))
rect.x = round(fz_to_real(fz_array_get(dest, 2)));
if (!fz_is_null(fz_array_get(dest, 3)))
rect.y = round(fz_to_real(fz_array_get(dest, 3)));
}
else if (strcmp(type, "FitR") == 0) {
double x0, y0, x1, y1;
x0 = fz_to_real(fz_array_get(dest, 2));
y0 = fz_to_real(fz_array_get(dest, 5));
x1 = fz_to_real(fz_array_get(dest, 4));
y1 = fz_to_real(fz_array_get(dest, 3));
rect.x = round(x0);
rect.y = round(y0);
rect.width = round(x1 - x0);
rect.height = round(y1 - y0);
}
else if (strcmp(type, "FitH") == 0 || strcmp(type, "FitBH") == 0) {
rect.y = round(fz_to_real(fz_array_get(dest, 2)));
}
return rect;
}
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;
}
