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helper-fields.i
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%{
/*
# ------------------------------------------------------------------------
# Copyright 2020-2022, Harald Lieder, mailto:harald.lieder@outlook.com
# License: GNU AFFERO GPL 3.0, https://www.gnu.org/licenses/agpl-3.0.html
#
# Part of "PyMuPDF", a Python binding for "MuPDF" (http://mupdf.com), a
# lightweight PDF, XPS, and E-book viewer, renderer and toolkit which is
# maintained and developed by Artifex Software, Inc. https://artifex.com.
# ------------------------------------------------------------------------
*/
#define SETATTR(a, v) PyObject_SetAttrString(Widget, a, v)
#define GETATTR(a) PyObject_GetAttrString(Widget, a)
#define CALLATTR(m, p) PyObject_CallMethod(Widget, m, p)
static void
SETATTR_DROP(PyObject *mod, const char *attr, PyObject *value)
{
if (!value)
PyObject_DelAttrString(mod, attr);
else
{
PyObject_SetAttrString(mod, attr, value);
Py_DECREF(value);
}
}
//-----------------------------------------------------------------------------
// Functions dealing with PDF form fields (widgets)
//-----------------------------------------------------------------------------
enum
{
SigFlag_SignaturesExist = 1,
SigFlag_AppendOnly = 2
};
// make new PDF action object from JavaScript source
// Parameters are a PDF document and a Python string.
// Returns a PDF action object.
//-----------------------------------------------------------------------------
pdf_obj *
JM_new_javascript(fz_context *ctx, pdf_document *pdf, PyObject *value)
{
fz_buffer *res = NULL;
if (!PyObject_IsTrue(value)) // no argument given
return NULL;
char *data = JM_StrAsChar(value);
if (!data) // not convertible to char*
return NULL;
res = fz_new_buffer_from_copied_data(ctx, data, strlen(data));
pdf_obj *source = pdf_add_stream(ctx, pdf, res, NULL, 0);
pdf_obj *newaction = pdf_add_new_dict(ctx, pdf, 4);
pdf_dict_put(ctx, newaction, PDF_NAME(S), pdf_new_name(ctx, "JavaScript"));
pdf_dict_put(ctx, newaction, PDF_NAME(JS), source);
fz_drop_buffer(ctx, res);
return pdf_keep_obj(ctx, newaction);
}
// JavaScript extractor
// Returns either the script source or None. Parameter is a PDF action
// dictionary, which must have keys /S and /JS. The value of /S must be
// '/JavaScript'. The value of /JS is returned.
//-----------------------------------------------------------------------------
PyObject *
JM_get_script(fz_context *ctx, pdf_obj *key)
{
pdf_obj *js = NULL;
fz_buffer *res = NULL;
PyObject *script = NULL;
if (!key) Py_RETURN_NONE;
if (!strcmp(pdf_to_name(ctx,
pdf_dict_get(ctx, key, PDF_NAME(S))), "JavaScript")) {
js = pdf_dict_get(ctx, key, PDF_NAME(JS));
}
if (!js) Py_RETURN_NONE;
if (pdf_is_string(ctx, js)) {
script = JM_UnicodeFromStr(pdf_to_text_string(ctx, js));
} else if (pdf_is_stream(ctx, js)) {
res = pdf_load_stream(ctx, js);
script = JM_EscapeStrFromBuffer(ctx, res);
fz_drop_buffer(ctx, res);
} else {
Py_RETURN_NONE;
}
if (PyObject_IsTrue(script)) { // do not return an empty script
return script;
}
Py_CLEAR(script);
Py_RETURN_NONE;
}
// Create a JavaScript PDF action.
// Usable for all object types which support PDF actions, even if the
// argument name suggests annotations. Up to 2 key values can be specified, so
// JavaScript actions can be stored for '/A' and '/AA/?' keys.
//-----------------------------------------------------------------------------
void JM_put_script(fz_context *ctx, pdf_obj *annot_obj, pdf_obj *key1, pdf_obj *key2, PyObject *value)
{
PyObject *script = NULL;
pdf_obj *key1_obj = pdf_dict_get(ctx, annot_obj, key1);
pdf_document *pdf = pdf_get_bound_document(ctx, annot_obj); // owning PDF
// if no new script given, just delete corresponding key
if (!value || !PyObject_IsTrue(value)) {
if (!key2) {
pdf_dict_del(ctx, annot_obj, key1);
} else if (key1_obj) {
pdf_dict_del(ctx, key1_obj, key2);
}
return;
}
// read any existing script as a PyUnicode string
if (!key2 || !key1_obj) {
script = JM_get_script(ctx, key1_obj);
} else {
script = JM_get_script(ctx, pdf_dict_get(ctx, key1_obj, key2));
}
// replace old script, if different from new one
if (!PyObject_RichCompareBool(value, script, Py_EQ)) {
pdf_obj *newaction = JM_new_javascript(ctx, pdf, value);
if (!key2) {
pdf_dict_put_drop(ctx, annot_obj, key1, newaction);
} else {
pdf_dict_putl_drop(ctx, annot_obj, newaction, key1, key2, NULL);
}
}
Py_XDECREF(script);
return;
}
/*
// Execute a JavaScript action for annot or field.
//-----------------------------------------------------------------------------
PyObject *
JM_exec_script(fz_context *ctx, pdf_obj *annot_obj, pdf_obj *key1, pdf_obj *key2)
{
PyObject *script = NULL;
char *code = NULL;
fz_try(ctx) {
pdf_document *pdf = pdf_get_bound_document(ctx, annot_obj);
char buf[100];
if (!key2) {
script = JM_get_script(ctx, key1_obj);
} else {
script = JM_get_script(ctx, pdf_dict_get(ctx, key1_obj, key2));
}
code = JM_StrAsChar(script);
fz_snprintf(buf, sizeof buf, "%d/A", pdf_to_num(ctx, annot_obj));
pdf_js_execute(pdf->js, buf, code);
}
fz_always(ctx) {
Py_XDECREF(string);
}
fz_catch(ctx) {
Py_RETURN_FALSE;
}
Py_RETURN_TRUE;
}
*/
// String from widget type
//-----------------------------------------------------------------------------
char *JM_field_type_text(int wtype)
{
switch(wtype) {
case(PDF_WIDGET_TYPE_BUTTON):
return "Button";
case(PDF_WIDGET_TYPE_CHECKBOX):
return "CheckBox";
case(PDF_WIDGET_TYPE_RADIOBUTTON):
return "RadioButton";
case(PDF_WIDGET_TYPE_TEXT):
return "Text";
case(PDF_WIDGET_TYPE_LISTBOX):
return "ListBox";
case(PDF_WIDGET_TYPE_COMBOBOX):
return "ComboBox";
case(PDF_WIDGET_TYPE_SIGNATURE):
return "Signature";
default:
return "unknown";
}
}
// Set the field type
//-----------------------------------------------------------------------------
void JM_set_field_type(fz_context *ctx, pdf_document *doc, pdf_obj *obj, int type)
{
int setbits = 0;
int clearbits = 0;
pdf_obj *typename = NULL;
switch(type) {
case PDF_WIDGET_TYPE_BUTTON:
typename = PDF_NAME(Btn);
setbits = PDF_BTN_FIELD_IS_PUSHBUTTON;
break;
case PDF_WIDGET_TYPE_RADIOBUTTON:
typename = PDF_NAME(Btn);
clearbits = PDF_BTN_FIELD_IS_PUSHBUTTON;
setbits = PDF_BTN_FIELD_IS_RADIO;
break;
case PDF_WIDGET_TYPE_CHECKBOX:
typename = PDF_NAME(Btn);
clearbits = (PDF_BTN_FIELD_IS_PUSHBUTTON|PDF_BTN_FIELD_IS_RADIO);
break;
case PDF_WIDGET_TYPE_TEXT:
typename = PDF_NAME(Tx);
break;
case PDF_WIDGET_TYPE_LISTBOX:
typename = PDF_NAME(Ch);
clearbits = PDF_CH_FIELD_IS_COMBO;
break;
case PDF_WIDGET_TYPE_COMBOBOX:
typename = PDF_NAME(Ch);
setbits = PDF_CH_FIELD_IS_COMBO;
break;
case PDF_WIDGET_TYPE_SIGNATURE:
typename = PDF_NAME(Sig);
break;
}
if (typename)
pdf_dict_put_drop(ctx, obj, PDF_NAME(FT), typename);
if (setbits != 0 || clearbits != 0) {
int bits = pdf_dict_get_int(ctx, obj, PDF_NAME(Ff));
bits &= ~clearbits;
bits |= setbits;
pdf_dict_put_int(ctx, obj, PDF_NAME(Ff), bits);
}
}
// Copied from MuPDF v1.14
// Create widget.
// Returns a kept reference to a pdf_annot - caller must drop it.
//-----------------------------------------------------------------------------
pdf_annot *JM_create_widget(fz_context *ctx, pdf_document *doc, pdf_page *page, int type, char *fieldname)
{
pdf_obj *form = NULL;
int old_sigflags = pdf_to_int(ctx, pdf_dict_getp(ctx, pdf_trailer(ctx, doc), "Root/AcroForm/SigFlags"));
pdf_annot *annot = pdf_create_annot_raw(ctx, page, PDF_ANNOT_WIDGET); // returns a kept reference.
pdf_obj *annot_obj = pdf_annot_obj(ctx, annot);
fz_try(ctx) {
JM_set_field_type(ctx, doc, annot_obj, type);
pdf_dict_put_text_string(ctx, annot_obj, PDF_NAME(T), fieldname);
if (type == PDF_WIDGET_TYPE_SIGNATURE) {
int sigflags = (old_sigflags | (SigFlag_SignaturesExist|SigFlag_AppendOnly));
pdf_dict_putl_drop(ctx, pdf_trailer(ctx, doc), pdf_new_int(ctx, sigflags), PDF_NAME(Root), PDF_NAME(AcroForm), PDF_NAME(SigFlags), NULL);
}
/*
pdf_create_annot will have linked the new widget into the page's
annot array. We also need it linked into the document's form
*/
form = pdf_dict_getp(ctx, pdf_trailer(ctx, doc), "Root/AcroForm/Fields");
if (!form) {
form = pdf_new_array(ctx, doc, 1);
pdf_dict_putl_drop(ctx, pdf_trailer(ctx, doc),
form,
PDF_NAME(Root),
PDF_NAME(AcroForm),
PDF_NAME(Fields),
NULL);
}
pdf_array_push(ctx, form, annot_obj); // Cleanup relies on this statement being last
}
fz_catch(ctx) {
pdf_delete_annot(ctx, page, annot);
if (type == PDF_WIDGET_TYPE_SIGNATURE) {
pdf_dict_putl_drop(ctx, pdf_trailer(ctx, doc), pdf_new_int(ctx, old_sigflags), PDF_NAME(Root), PDF_NAME(AcroForm), PDF_NAME(SigFlags), NULL);
}
fz_rethrow(ctx);
}
return annot;
}
// PushButton get state
//-----------------------------------------------------------------------------
PyObject *JM_pushbtn_state(fz_context *ctx, pdf_annot *annot)
{ // pushed buttons do not reflect status changes in the PDF
// always reflect them as untouched
Py_RETURN_FALSE;
}
// Text field retrieve value
//-----------------------------------------------------------------------------
PyObject *JM_text_value(fz_context *ctx, pdf_annot *annot)
{
const char *text = NULL;
fz_var(text);
fz_try(ctx) {
pdf_obj *annot_obj = pdf_annot_obj(ctx, annot);
text = pdf_field_value(ctx, annot_obj);
}
fz_catch(ctx) Py_RETURN_NONE;
return JM_UnicodeFromStr(text);
}
// ListBox retrieve value
//-----------------------------------------------------------------------------
PyObject *JM_listbox_value(fz_context *ctx, pdf_annot *annot)
{
int i = 0, n = 0;
// may be single value or array
pdf_obj *annot_obj = pdf_annot_obj(ctx, annot);
pdf_obj *optarr = pdf_dict_get(ctx, annot_obj, PDF_NAME(V));
if (pdf_is_string(ctx, optarr)) // a single string
return PyString_FromString(pdf_to_text_string(ctx, optarr));
// value is an array (may have len 0)
n = pdf_array_len(ctx, optarr);
PyObject *liste = PyList_New(0);
// extract a list of strings
// each entry may again be an array: take second entry then
for (i = 0; i < n; i++) {
pdf_obj *elem = pdf_array_get(ctx, optarr, i);
if (pdf_is_array(ctx, elem))
elem = pdf_array_get(ctx, elem, 1);
LIST_APPEND_DROP(liste, JM_UnicodeFromStr(pdf_to_text_string(ctx, elem)));
}
return liste;
}
// ComboBox retrieve value
//-----------------------------------------------------------------------------
PyObject *JM_combobox_value(fz_context *ctx, pdf_annot *annot)
{ // combobox treated like listbox
return JM_listbox_value(ctx, annot);
}
// Signature field retrieve value
PyObject *JM_signature_value(fz_context *ctx, pdf_annot *annot)
{ // signatures are currently not supported
Py_RETURN_NONE;
}
// retrieve ListBox / ComboBox choice values
//-----------------------------------------------------------------------------
PyObject *JM_choice_options(fz_context *ctx, pdf_annot *annot)
{ // return list of choices for list or combo boxes
pdf_obj *annot_obj = pdf_annot_obj(ctx, annot);
PyObject *val;
int n = pdf_choice_widget_options(ctx, annot, 0, NULL);
if (n == 0) Py_RETURN_NONE; // wrong widget type
pdf_obj *optarr = pdf_dict_get(ctx, annot_obj, PDF_NAME(Opt));
int i, m;
PyObject *liste = PyList_New(0);
for (i = 0; i < n; i++) {
m = pdf_array_len(ctx, pdf_array_get(ctx, optarr, i));
if (m == 2) {
val = Py_BuildValue("ss",
pdf_to_text_string(ctx, pdf_array_get(ctx, pdf_array_get(ctx, optarr, i), 0)),
pdf_to_text_string(ctx, pdf_array_get(ctx, pdf_array_get(ctx, optarr, i), 1)));
LIST_APPEND_DROP(liste, val);
} else {
val = JM_UnicodeFromStr(pdf_to_text_string(ctx, pdf_array_get(ctx, optarr, i)));
LIST_APPEND_DROP(liste, val);
}
}
return liste;
}
// set ListBox / ComboBox values
//-----------------------------------------------------------------------------
void JM_set_choice_options(fz_context *ctx, pdf_annot *annot, PyObject *liste)
{
if (!liste) return;
if (!PySequence_Check(liste)) return;
Py_ssize_t i, n = PySequence_Size(liste);
if (n < 1) return;
PyObject *tuple = PySequence_Tuple(liste);
PyObject *val = NULL, *val1 = NULL, *val2 = NULL;
pdf_obj *optarrsub = NULL, *optarr = NULL, *annot_obj = NULL;
pdf_document *pdf = NULL;
const char *opt = NULL, *opt1 = NULL, *opt2 = NULL;
fz_try(ctx) {
annot_obj = pdf_annot_obj(ctx, annot);
pdf = pdf_get_bound_document(ctx, annot_obj);
optarr = pdf_new_array(ctx, pdf, (int) n);
for (i = 0; i < n; i++) {
val = PyTuple_GET_ITEM(tuple, i);
opt = PyUnicode_AsUTF8(val);
if (opt) {
pdf_array_push_text_string(ctx, optarr, opt);
} else {
if (!PySequence_Check(val) || PySequence_Size(val) != 2) {
RAISEPY(ctx, "bad choice field list", PyExc_ValueError);
}
val1 = PySequence_GetItem(val, 0);
opt1 = PyUnicode_AsUTF8(val1);
if (!opt1) {
RAISEPY(ctx, "bad choice field list", PyExc_ValueError);
}
val2 = PySequence_GetItem(val, 1);
opt2 = PyUnicode_AsUTF8(val2);
if (!opt2) {
RAISEPY(ctx, "bad choice field list", PyExc_ValueError);
};
Py_CLEAR(val1);
Py_CLEAR(val2);
optarrsub = pdf_array_push_array(ctx, optarr, 2);
pdf_array_push_text_string(ctx, optarrsub, opt1);
pdf_array_push_text_string(ctx, optarrsub, opt2);
}
}
pdf_dict_put_drop(ctx, annot_obj, PDF_NAME(Opt), optarr);
}
fz_always(ctx) {
Py_CLEAR(tuple);
Py_CLEAR(val1);
Py_CLEAR(val2);
PyErr_Clear();
}
fz_catch(ctx) {
fz_rethrow(ctx);
}
return;
}
//-----------------------------------------------------------------------------
// Populate a Python Widget object with the values from a PDF form field.
// Called by "Page.firstWidget" and "Widget.next".
//-----------------------------------------------------------------------------
void JM_get_widget_properties(fz_context *ctx, pdf_annot *annot, PyObject *Widget)
{
pdf_obj *annot_obj = pdf_annot_obj(ctx, annot);
pdf_page *page = pdf_annot_page(ctx, annot);
pdf_document *pdf = page->doc;
pdf_annot *tw = annot;
pdf_obj *obj = NULL;
Py_ssize_t i = 0, n = 0;
fz_try(ctx) {
int field_type = pdf_widget_type(ctx, tw);
SETATTR_DROP(Widget, "field_type", Py_BuildValue("i", field_type));
if (field_type == PDF_WIDGET_TYPE_SIGNATURE) {
if (pdf_signature_is_signed(ctx, pdf, annot_obj)) {
SETATTR("is_signed", Py_True);
} else {
SETATTR("is_signed", Py_False);
}
} else {
SETATTR("is_signed", Py_None);
}
SETATTR_DROP(Widget, "border_style",
JM_UnicodeFromStr(pdf_field_border_style(ctx, annot_obj)));
SETATTR_DROP(Widget, "field_type_string",
JM_UnicodeFromStr(JM_field_type_text(field_type)));
#if FZ_VERSION_MAJOR == 1 && FZ_VERSION_MINOR <= 22
char *field_name = pdf_field_name(ctx, annot_obj);
#else
char *field_name = pdf_load_field_name(ctx, annot_obj);
#endif
SETATTR_DROP(Widget, "field_name", JM_UnicodeFromStr(field_name));
JM_Free(field_name);
const char *label = NULL;
obj = pdf_dict_get(ctx, annot_obj, PDF_NAME(TU));
if (obj) label = pdf_to_text_string(ctx, obj);
SETATTR_DROP(Widget, "field_label", JM_UnicodeFromStr(label));
const char *fvalue = NULL;
if (field_type == PDF_WIDGET_TYPE_RADIOBUTTON) {
obj = pdf_dict_get(ctx, annot_obj, PDF_NAME(Parent)); // owning RB group
if (obj) {
SETATTR_DROP(Widget, "rb_parent", Py_BuildValue("i", pdf_to_num(ctx, obj)));
}
obj = pdf_dict_get(ctx, annot_obj, PDF_NAME(AS));
if (obj) {
fvalue = pdf_to_name(ctx, obj);
}
}
if (!fvalue) {
fvalue = pdf_field_value(ctx, annot_obj);
}
SETATTR_DROP(Widget, "field_value", JM_UnicodeFromStr(fvalue));
SETATTR_DROP(Widget, "field_display",
Py_BuildValue("i", pdf_field_display(ctx, annot_obj)));
float border_width = pdf_to_real(ctx, pdf_dict_getl(ctx, annot_obj,
PDF_NAME(BS), PDF_NAME(W), NULL));
if (border_width == 0) border_width = 1;
SETATTR_DROP(Widget, "border_width",
Py_BuildValue("f", border_width));
obj = pdf_dict_getl(ctx, annot_obj,
PDF_NAME(BS), PDF_NAME(D), NULL);
if (pdf_is_array(ctx, obj)) {
n = (Py_ssize_t) pdf_array_len(ctx, obj);
PyObject *d = PyList_New(n);
for (i = 0; i < n; i++) {
PyList_SET_ITEM(d, i, Py_BuildValue("i", pdf_to_int(ctx,
pdf_array_get(ctx, obj, (int) i))));
}
SETATTR_DROP(Widget, "border_dashes", d);
}
SETATTR_DROP(Widget, "text_maxlen",
Py_BuildValue("i", pdf_text_widget_max_len(ctx, tw)));
SETATTR_DROP(Widget, "text_format",
Py_BuildValue("i", pdf_text_widget_format(ctx, tw)));
obj = pdf_dict_getl(ctx, annot_obj, PDF_NAME(MK), PDF_NAME(BG), NULL);
if (pdf_is_array(ctx, obj)) {
n = (Py_ssize_t) pdf_array_len(ctx, obj);
PyObject *col = PyList_New(n);
for (i = 0; i < n; i++) {
PyList_SET_ITEM(col, i, Py_BuildValue("f",
pdf_to_real(ctx, pdf_array_get(ctx, obj, (int) i))));
}
SETATTR_DROP(Widget, "fill_color", col);
}
obj = pdf_dict_getl(ctx, annot_obj, PDF_NAME(MK), PDF_NAME(BC), NULL);
if (pdf_is_array(ctx, obj)) {
n = (Py_ssize_t) pdf_array_len(ctx, obj);
PyObject *col = PyList_New(n);
for (i = 0; i < n; i++) {
PyList_SET_ITEM(col, i, Py_BuildValue("f",
pdf_to_real(ctx, pdf_array_get(ctx, obj, (int) i))));
}
SETATTR_DROP(Widget, "border_color", col);
}
SETATTR_DROP(Widget, "choice_values", JM_choice_options(ctx, annot));
const char *da = pdf_to_text_string(ctx, pdf_dict_get_inheritable(ctx,
annot_obj, PDF_NAME(DA)));
SETATTR_DROP(Widget, "_text_da", JM_UnicodeFromStr(da));
obj = pdf_dict_getl(ctx, annot_obj, PDF_NAME(MK), PDF_NAME(CA), NULL);
if (obj) {
SETATTR_DROP(Widget, "button_caption",
JM_UnicodeFromStr((char *)pdf_to_text_string(ctx, obj)));
}
SETATTR_DROP(Widget, "field_flags",
Py_BuildValue("i", pdf_field_flags(ctx, annot_obj)));
// call Py method to reconstruct text color, font name, size
PyObject *call = CALLATTR("_parse_da", NULL);
Py_XDECREF(call);
// extract JavaScript action texts
SETATTR_DROP(Widget, "script",
JM_get_script(ctx, pdf_dict_get(ctx, annot_obj, PDF_NAME(A))));
SETATTR_DROP(Widget, "script_stroke",
JM_get_script(ctx, pdf_dict_getl(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(K), NULL)));
SETATTR_DROP(Widget, "script_format",
JM_get_script(ctx, pdf_dict_getl(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(F), NULL)));
SETATTR_DROP(Widget, "script_change",
JM_get_script(ctx, pdf_dict_getl(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(V), NULL)));
SETATTR_DROP(Widget, "script_calc",
JM_get_script(ctx, pdf_dict_getl(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(C), NULL)));
SETATTR_DROP(Widget, "script_blur",
JM_get_script(ctx, pdf_dict_getl(ctx, annot_obj, PDF_NAME(AA), pdf_new_name(ctx, "Bl"), NULL)));
SETATTR_DROP(Widget, "script_focus",
JM_get_script(ctx, pdf_dict_getl(ctx, annot_obj, PDF_NAME(AA), pdf_new_name(ctx, "Fo"), NULL)));
}
fz_always(ctx) PyErr_Clear();
fz_catch(ctx) fz_rethrow(ctx);
return;
}
//-----------------------------------------------------------------------------
// Update the PDF form field with the properties from a Python Widget object.
// Called by "Page.addWidget" and "Annot.updateWidget".
//-----------------------------------------------------------------------------
void JM_set_widget_properties(fz_context *ctx, pdf_annot *annot, PyObject *Widget)
{
pdf_page *page = pdf_annot_page(ctx, annot);
pdf_obj *annot_obj = pdf_annot_obj(ctx, annot);
pdf_document *pdf = page->doc;
fz_rect rect;
pdf_obj *fill_col = NULL, *border_col = NULL;
pdf_obj *dashes = NULL;
Py_ssize_t i, n = 0;
int d;
PyObject *value = GETATTR("field_type");
int field_type = (int) PyInt_AsLong(value);
Py_DECREF(value);
// rectangle --------------------------------------------------------------
value = GETATTR("rect");
rect = JM_rect_from_py(value);
Py_XDECREF(value);
fz_matrix rot_mat = JM_rotate_page_matrix(ctx, page);
rect = fz_transform_rect(rect, rot_mat);
pdf_set_annot_rect(ctx, annot, rect);
// fill color -------------------------------------------------------------
value = GETATTR("fill_color");
if (value && PySequence_Check(value)) {
n = PySequence_Size(value);
fill_col = pdf_new_array(ctx, pdf, n);
double col = 0;
for (i = 0; i < n; i++) {
JM_FLOAT_ITEM(value, i, &col);
pdf_array_push_real(ctx, fill_col, col);
}
pdf_field_set_fill_color(ctx, annot_obj, fill_col);
pdf_drop_obj(ctx, fill_col);
}
Py_XDECREF(value);
// dashes -----------------------------------------------------------------
value = GETATTR("border_dashes");
if (value && PySequence_Check(value)) {
n = PySequence_Size(value);
dashes = pdf_new_array(ctx, pdf, n);
for (i = 0; i < n; i++) {
pdf_array_push_int(ctx, dashes,
(int64_t) PyInt_AsLong(PySequence_ITEM(value, i)));
}
pdf_dict_putl_drop(ctx, annot_obj, dashes,
PDF_NAME(BS),
PDF_NAME(D),
NULL);
}
Py_XDECREF(value);
// border color -----------------------------------------------------------
value = GETATTR("border_color");
if (value && PySequence_Check(value)) {
n = PySequence_Size(value);
border_col = pdf_new_array(ctx, pdf, n);
double col = 0;
for (i = 0; i < n; i++) {
JM_FLOAT_ITEM(value, i, &col);
pdf_array_push_real(ctx, border_col, col);
}
pdf_dict_putl_drop(ctx, annot_obj, border_col,
PDF_NAME(MK),
PDF_NAME(BC),
NULL);
}
Py_XDECREF(value);
// entry ignored - may be used later
/*
int text_format = (int) PyInt_AsLong(GETATTR("text_format"));
*/
// field label -----------------------------------------------------------
value = GETATTR("field_label");
if (value != Py_None) {
char *label = JM_StrAsChar(value);
pdf_dict_put_text_string(ctx, annot_obj, PDF_NAME(TU), label);
}
Py_XDECREF(value);
// field name -------------------------------------------------------------
value = GETATTR("field_name");
if (value != Py_None) {
char *name = JM_StrAsChar(value);
#if FZ_VERSION_MAJOR == 1 && FZ_VERSION_MINOR <= 22
char *old_name = pdf_field_name(ctx, annot_obj);
#else
char *old_name = pdf_load_field_name(ctx, annot_obj);
#endif
if (strcmp(name, old_name) != 0) {
pdf_dict_put_text_string(ctx, annot_obj, PDF_NAME(T), name);
}
JM_Free(old_name);
}
Py_XDECREF(value);
// max text len -----------------------------------------------------------
if (field_type == PDF_WIDGET_TYPE_TEXT)
{
value = GETATTR("text_maxlen");
int text_maxlen = (int) PyInt_AsLong(value);
if (text_maxlen) {
pdf_dict_put_int(ctx, annot_obj, PDF_NAME(MaxLen), text_maxlen);
}
Py_XDECREF(value);
}
value = GETATTR("field_display");
d = (int) PyInt_AsLong(value);
Py_XDECREF(value);
pdf_field_set_display(ctx, annot_obj, d);
// choice values ----------------------------------------------------------
if (field_type == PDF_WIDGET_TYPE_LISTBOX ||
field_type == PDF_WIDGET_TYPE_COMBOBOX) {
value = GETATTR("choice_values");
JM_set_choice_options(ctx, annot, value);
Py_XDECREF(value);
}
// border style -----------------------------------------------------------
value = GETATTR("border_style");
pdf_obj *val = JM_get_border_style(ctx, value);
Py_XDECREF(value);
pdf_dict_putl_drop(ctx, annot_obj, val,
PDF_NAME(BS),
PDF_NAME(S),
NULL);
// border width -----------------------------------------------------------
value = GETATTR("border_width");
float border_width = (float) PyFloat_AsDouble(value);
Py_XDECREF(value);
pdf_dict_putl_drop(ctx, annot_obj, pdf_new_real(ctx, border_width),
PDF_NAME(BS),
PDF_NAME(W),
NULL);
// /DA string -------------------------------------------------------------
value = GETATTR("_text_da");
char *da = JM_StrAsChar(value);
Py_XDECREF(value);
pdf_dict_put_text_string(ctx, annot_obj, PDF_NAME(DA), da);
pdf_dict_del(ctx, annot_obj, PDF_NAME(DS)); /* not supported by MuPDF */
pdf_dict_del(ctx, annot_obj, PDF_NAME(RC)); /* not supported by MuPDF */
// field flags ------------------------------------------------------------
value = GETATTR("field_flags");
int field_flags = (int) PyInt_AsLong(value);
Py_XDECREF(value);
if (!PyErr_Occurred()) {
if (field_type == PDF_WIDGET_TYPE_COMBOBOX) {
field_flags |= PDF_CH_FIELD_IS_COMBO;
} else if (field_type == PDF_WIDGET_TYPE_RADIOBUTTON) {
field_flags |= PDF_BTN_FIELD_IS_RADIO;
} else if (field_type == PDF_WIDGET_TYPE_BUTTON) {
field_flags |= PDF_BTN_FIELD_IS_PUSHBUTTON;
}
pdf_dict_put_int(ctx, annot_obj, PDF_NAME(Ff), field_flags);
}
// button caption ---------------------------------------------------------
value = GETATTR("button_caption");
char *ca = JM_StrAsChar(value);
if (ca) {
pdf_field_set_button_caption(ctx, annot_obj, ca);
}
Py_XDECREF(value);
// script (/A) -------------------------------------------------------
value = GETATTR("script");
JM_put_script(ctx, annot_obj, PDF_NAME(A), NULL, value);
Py_CLEAR(value);
// script (/AA/K) -------------------------------------------------------
value = GETATTR("script_stroke");
JM_put_script(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(K), value);
Py_CLEAR(value);
// script (/AA/F) -------------------------------------------------------
value = GETATTR("script_format");
JM_put_script(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(F), value);
Py_CLEAR(value);
// script (/AA/V) -------------------------------------------------------
value = GETATTR("script_change");
JM_put_script(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(V), value);
Py_CLEAR(value);
// script (/AA/C) -------------------------------------------------------
value = GETATTR("script_calc");
JM_put_script(ctx, annot_obj, PDF_NAME(AA), PDF_NAME(C), value);
Py_CLEAR(value);
// script (/AA/Bl) ------------------------------------------------------
value = GETATTR("script_blur");
JM_put_script(ctx, annot_obj, PDF_NAME(AA), pdf_new_name(ctx, "Bl"), value);
Py_CLEAR(value);
// script (/AA/Fo) ------------------------------------------------------
value = GETATTR("script_focus");
JM_put_script(ctx, annot_obj, PDF_NAME(AA), pdf_new_name(ctx, "Fo"), value);
Py_CLEAR(value);
// field value ------------------------------------------------------------
value = GETATTR("field_value"); // field value
char *text = JM_StrAsChar(value); // convert to text (may fail!)
switch(field_type)
{
case PDF_WIDGET_TYPE_RADIOBUTTON:
if (PyObject_RichCompareBool(value, Py_False, Py_EQ)) {
pdf_set_field_value(ctx, pdf, annot_obj, "Off", 1);
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(AS), "Off");
} else {
pdf_obj *onstate = pdf_button_field_on_state(ctx, annot_obj);
if (onstate) {
const char *on = pdf_to_name(ctx, onstate);
pdf_set_field_value(ctx, pdf, annot_obj, on, 1);
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(AS), on);
} else if (text) {
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(AS), text);
}
}
break;
case PDF_WIDGET_TYPE_CHECKBOX: // will always be "Yes" or "Off"
if (PyObject_RichCompareBool(value, Py_True, Py_EQ) || text && strcmp(text, "Yes")==0) {
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(AS), "Yes");
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(V), "Yes");
} else {
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(AS), "Off");
pdf_dict_put_name(gctx, annot_obj, PDF_NAME(V), "Off");
}
break;
default:
if (text) {
pdf_set_field_value(ctx, pdf, annot_obj, (const char *)text, 1);
if (field_type == PDF_WIDGET_TYPE_COMBOBOX || field_type == PDF_WIDGET_TYPE_LISTBOX) {
pdf_dict_del(ctx, annot_obj, PDF_NAME(I));
}
}
}
Py_CLEAR(value);
PyErr_Clear();
pdf_dirty_annot(ctx, annot);
pdf_set_annot_hot(ctx, annot, 1);
pdf_set_annot_active(ctx, annot, 1);
pdf_update_annot(ctx, annot);
}
#undef SETATTR
#undef GETATTR
#undef CALLATTR
%}
%pythoncode %{
#------------------------------------------------------------------------------
# Class describing a PDF form field ("widget")
#------------------------------------------------------------------------------
class Widget(object):
def __init__(self):
self.thisown = True
self.border_color = None
self.border_style = "S"
self.border_width = 0
self.border_dashes = None
self.choice_values = None # choice fields only
self.rb_parent = None # radio buttons only: xref of owning parent
self.field_name = None # field name
self.field_label = None # field label
self.field_value = None
self.field_flags = 0
self.field_display = 0
self.field_type = 0 # valid range 1 through 7
self.field_type_string = None # field type as string
self.fill_color = None
self.button_caption = None # button caption
self.is_signed = None # True / False if signature
self.text_color = (0, 0, 0)
self.text_font = "Helv"
self.text_fontsize = 0
self.text_maxlen = 0 # text fields only
self.text_format = 0 # text fields only
self._text_da = "" # /DA = default apparance
self.script = None # JavaScript (/A)
self.script_stroke = None # JavaScript (/AA/K)
self.script_format = None # JavaScript (/AA/F)
self.script_change = None # JavaScript (/AA/V)
self.script_calc = None # JavaScript (/AA/C)
self.script_blur = None # JavaScript (/AA/Bl)
self.script_focus = None # JavaScript (/AA/Fo)
self.rect = None # annot value
self.xref = 0 # annot value
def _validate(self):
"""Validate the class entries.
"""
if (self.rect.is_infinite
or self.rect.is_empty
):
raise ValueError("bad rect")
if not self.field_name:
raise ValueError("field name missing")
if self.field_label == "Unnamed":
self.field_label = None
CheckColor(self.border_color)
CheckColor(self.fill_color)
if not self.text_color:
self.text_color = (0, 0, 0)
CheckColor(self.text_color)
if not self.border_width:
self.border_width = 0
if not self.text_fontsize:
self.text_fontsize = 0
self.border_style = self.border_style.upper()[0:1]
# standardize content of JavaScript entries
btn_type = self.field_type in (
PDF_WIDGET_TYPE_BUTTON,
PDF_WIDGET_TYPE_CHECKBOX,
PDF_WIDGET_TYPE_RADIOBUTTON
)
if not self.script:
self.script = None
elif type(self.script) is not str:
raise ValueError("script content must be a string")
# buttons cannot have the following script actions
if btn_type or not self.script_calc:
self.script_calc = None
elif type(self.script_calc) is not str:
raise ValueError("script_calc content must be a string")
if btn_type or not self.script_change:
self.script_change = None
elif type(self.script_change) is not str:
raise ValueError("script_change content must be a string")
if btn_type or not self.script_format:
self.script_format = None
elif type(self.script_format) is not str:
raise ValueError("script_format content must be a string")
if btn_type or not self.script_stroke:
self.script_stroke = None
elif type(self.script_stroke) is not str:
raise ValueError("script_stroke content must be a string")
if btn_type or not self.script_blur:
self.script_blur = None
elif type(self.script_blur) is not str:
raise ValueError("script_blur content must be a string")
if btn_type or not self.script_focus:
self.script_focus = None
elif type(self.script_focus) is not str:
raise ValueError("script_focus content must be a string")
self._checker() # any field_type specific checks
def _adjust_font(self):
"""Ensure text_font is correctly spelled if empty or from our list.
Otherwise assume the font is in an existing field.
"""
if not self.text_font:
self.text_font = "Helv"
return
doc = self.parent.parent
for f in doc.FormFonts + ["Cour", "TiRo", "Helv", "ZaDb"]:
if self.text_font.lower() == f.lower():
self.text_font = f
return
self.text_font = "Helv"
return
def _parse_da(self):
"""Extract font name, size and color from default appearance string (/DA object).
Equivalent to 'pdf_parse_default_appearance' function in MuPDF's 'pdf-annot.c'.
"""
if not self._text_da:
return
font = "Helv"
fsize = 0