static void pdfapp_gotopage(pdfapp_t *app, fz_obj *obj) { int number; number = pdf_find_page_number(app->xref, obj); if (number < 0) return; if (app->histlen + 1 == 256) { memmove(app->hist, app->hist + 1, sizeof(int) * 255); app->histlen --; } app->hist[app->histlen++] = app->pageno; app->pageno = number + 1; pdfapp_showpage(app, 1, 1, 1); }
static int _pdf_doc_find_page_no( struct _pdf_doc *self, fz_obj *dest) { if (fz_is_dict(dest)) { /* The destination is linked from a Go-To action's D array. */ fz_obj * D = fz_dict_gets(dest, "D"); if (D && fz_is_array(D)) dest = D; } if (fz_is_array(dest)) dest = fz_array_get(dest, 0); if (fz_is_int(dest)) return fz_to_int(dest); return pdf_find_page_number(self->xref, dest); }
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; }