diff options
| -rw-r--r-- | pdf/pdf_form.c | 168 |
1 files changed, 112 insertions, 56 deletions
diff --git a/pdf/pdf_form.c b/pdf/pdf_form.c index ec2190f6..871c9a55 100644 --- a/pdf/pdf_form.c +++ b/pdf/pdf_form.c @@ -1545,11 +1545,10 @@ pdf_obj *pdf_lookup_field(pdf_obj *form, char *name) return dict; } -void pdf_field_reset(pdf_document *doc, pdf_obj *field) +static void reset_field(pdf_document *doc, pdf_obj *field) { fz_context *ctx = doc->ctx; - /* Descend through the hierarchy, setting V to DV where - * ever DV is present, and deleting V where DV is not. + /* Set V to DV whereever DV is present, and delete V where DV is not. * FIXME: we assume for now that V has not been set unequal * to DV higher in the hierarchy than "field". * @@ -1558,25 +1557,13 @@ void pdf_field_reset(pdf_document *doc, pdf_obj *field) * dictionaries, and attempts to remove V will be harmless. */ pdf_obj *dv = pdf_dict_gets(field, "DV"); pdf_obj *kids = pdf_dict_gets(field, "Kids"); - pdf_obj *noreset = pdf_dict_gets(field, "NoReset"); - - /* Don't process fields we have marked not to be reset */ - if (noreset) - return; if (dv) pdf_dict_puts(field, "V", dv); else pdf_dict_dels(field, "V"); - if (kids) - { - int i, n = pdf_array_len(kids); - - for (i = 0; i < n; i++) - pdf_field_reset(doc, pdf_array_get(kids, i)); - } - else + if (kids == NULL) { /* The leaves of the tree are widget annotations * In some cases we need to update the appearance state; @@ -1621,22 +1608,66 @@ void pdf_field_reset(pdf_document *doc, pdf_obj *field) doc->dirty = 1; } +void pdf_field_reset(pdf_document *doc, pdf_obj *field) +{ + fz_context *ctx = doc->ctx; + pdf_obj *kids = pdf_dict_gets(field, "Kids"); + + reset_field(doc, field); -static void reset_form(pdf_document *doc, pdf_obj *fields, int exclude) + if (kids) + { + int i, n = pdf_array_len(kids); + + for (i = 0; i < n; i++) + pdf_field_reset(doc, pdf_array_get(kids, i)); + } +} + +static void add_field_hierarchy_to_array(pdf_obj *array, pdf_obj *field) +{ + pdf_obj *kids = pdf_dict_gets(field, "Kids"); + pdf_obj *exclude = pdf_dict_gets(field, "Exclude"); + + if (exclude) + return; + + pdf_array_push(array, field); + + if (kids) + { + int i, n = pdf_array_len(kids); + + for (i = 0; i < n; i++) + add_field_hierarchy_to_array(array, pdf_array_get(kids, i)); + } +} + +/* + When resetting or submitting a form, the fields to act upon are defined + by an array of either field references or field names, plus a flag determining + whether to act upon the fields in the array, or all fields other than those in + the array. specified_fields interprets this information and produces the array + of fields to be acted upon. +*/ +static pdf_obj *specified_fields(pdf_document *doc, pdf_obj *fields, int exclude) { fz_context *ctx = doc->ctx; pdf_obj *form = pdf_dict_getp(doc->trailer, "Root/AcroForm/Fields"); int i, n; + pdf_obj *result = pdf_new_array(ctx, 0); + pdf_obj *nil = NULL; - /* The 'fields' array not being present signals that all fields - * should be reset, so handle it using the exclude case - excluding none */ - if (exclude || !fields) + fz_var(nil); + fz_try(ctx) { - /* mark the fields we don't want to reset */ - pdf_obj *nil = pdf_new_null(ctx); - - fz_try(ctx) + /* The 'fields' array not being present signals that all fields + * should be acted upon, so handle it using the exclude case - excluding none */ + if (exclude || !fields) { + /* mark the fields we don't want to act upon */ + nil = pdf_new_null(ctx); + n = pdf_array_len(fields); for (i = 0; i < n; i++) @@ -1647,52 +1678,77 @@ static void reset_form(pdf_document *doc, pdf_obj *fields, int exclude) field = pdf_lookup_field(form, pdf_to_str_buf(field)); if (field) - pdf_dict_puts(field, "NoReset", nil); + pdf_dict_puts(field, "Exclude", nil); } - } - fz_always(ctx) - { - pdf_drop_obj(nil); - } - fz_catch(ctx) - { - fz_rethrow(ctx); - } - /* reset all unmarked fields */ - n = pdf_array_len(form); + /* Act upon all unmarked fields */ + n = pdf_array_len(form); - for (i = 0; i < n; i++) - pdf_field_reset(doc, pdf_array_get(form, i)); + for (i = 0; i < n; i++) + add_field_hierarchy_to_array(result, pdf_array_get(form, i)); - /* Unmark the marked fields */ - n = pdf_array_len(fields); + /* Unmark the marked fields */ + n = pdf_array_len(fields); - for (i = 0; i < n; i++) + for (i = 0; i < n; i++) + { + pdf_obj *field = pdf_array_get(fields, i); + + if (pdf_is_string(field)) + field = pdf_lookup_field(form, pdf_to_str_buf(field)); + + if (field) + pdf_dict_dels(field, "Exclude"); + } + } + else { - pdf_obj *field = pdf_array_get(fields, i); + n = pdf_array_len(fields); - if (pdf_is_string(field)) - field = pdf_lookup_field(form, pdf_to_str_buf(field)); + for (i = 0; i < n; i++) + { + pdf_obj *field = pdf_array_get(fields, i); + + if (pdf_is_string(field)) + field = pdf_lookup_field(form, pdf_to_str_buf(field)); - if (field) - pdf_dict_dels(field, "NoReset"); + if (field) + add_field_hierarchy_to_array(result, field); + } } } - else + fz_always(ctx) { - n = pdf_array_len(fields); + pdf_drop_obj(nil); + } + fz_catch(ctx) + { + pdf_drop_obj(result); + fz_rethrow(ctx); + } - for (i = 0; i < n; i++) - { - pdf_obj *field = pdf_array_get(fields, i); + return result; +} - if (pdf_is_string(field)) - field = pdf_lookup_field(form, pdf_to_str_buf(field)); +static void reset_form(pdf_document *doc, pdf_obj *fields, int exclude) +{ + fz_context *ctx = doc->ctx; + pdf_obj *sfields = specified_fields(doc, fields, exclude); - if (field) - pdf_field_reset(doc, field); - } + fz_try(ctx) + { + int i, n = pdf_array_len(sfields); + + for (i = 0; i < n; i++) + reset_field(doc, pdf_array_get(sfields, i)); + } + fz_always(ctx) + { + pdf_drop_obj(sfields); + } + fz_catch(ctx) + { + fz_rethrow(ctx); } } |