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|
#include "mupdf/fitz.h"
#include "mupdf/pdf.h"
#include <string.h>
/* Must be kept in sync with definitions in pdf_util.js */
enum
{
Display_Visible,
Display_Hidden,
Display_NoPrint,
Display_NoView
};
enum
{
SigFlag_SignaturesExist = 1,
SigFlag_AppendOnly = 2
};
static int pdf_field_dirties_document(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
int ff = pdf_get_field_flags(ctx, doc, field);
if (ff & Ff_NoExport) return 0;
if (ff & Ff_ReadOnly) return 0;
return 1;
}
/* Find the point in a field hierarchy where all descendants
* share the same name */
static pdf_obj *find_head_of_field_group(fz_context *ctx, pdf_obj *obj)
{
if (obj == NULL || pdf_dict_get(ctx, obj, PDF_NAME_T))
return obj;
else
return find_head_of_field_group(ctx, pdf_dict_get(ctx, obj, PDF_NAME_Parent));
}
static void pdf_field_mark_dirty(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
pdf_field_mark_dirty(ctx, doc, pdf_array_get(ctx, kids, i));
}
else
{
pdf_dirty_obj(ctx, field);
}
}
static void update_field_value(fz_context *ctx, pdf_document *doc, pdf_obj *obj, const char *text)
{
pdf_obj *sobj;
pdf_obj *grp;
if (!text)
text = "";
/* All fields of the same name should be updated, so
* set the value at the head of the group */
grp = find_head_of_field_group(ctx, obj);
if (grp)
obj = grp;
sobj = pdf_new_string(ctx, doc, text, strlen(text));
pdf_dict_put_drop(ctx, obj, PDF_NAME_V, sobj);
pdf_field_mark_dirty(ctx, doc, obj);
}
static pdf_obj *find_field(fz_context *ctx, pdf_obj *dict, char *name, int len)
{
pdf_obj *field;
int i, n = pdf_array_len(ctx, dict);
for (i = 0; i < n; i++)
{
char *part;
field = pdf_array_get(ctx, dict, i);
part = pdf_to_str_buf(ctx, pdf_dict_get(ctx, field, PDF_NAME_T));
if (strlen(part) == (size_t)len && !memcmp(part, name, len))
return field;
}
return NULL;
}
pdf_obj *pdf_lookup_field(fz_context *ctx, pdf_obj *form, char *name)
{
char *dot;
char *namep;
pdf_obj *dict = NULL;
int len;
/* Process the fully qualified field name which has
* the partial names delimited by '.'. Pretend there
* was a preceding '.' to simplify the loop */
dot = name - 1;
while (dot && form)
{
namep = dot + 1;
dot = strchr(namep, '.');
len = dot ? dot - namep : (int)strlen(namep);
dict = find_field(ctx, form, namep, len);
if (dot)
form = pdf_dict_get(ctx, dict, PDF_NAME_Kids);
}
return dict;
}
static void reset_form_field(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
/* Set V to DV wherever 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".
*
* At the bottom of the hierarchy we may find widget annotations
* that aren't also fields, but DV and V will not be present in their
* dictionaries, and attempts to remove V will be harmless. */
pdf_obj *dv = pdf_dict_get(ctx, field, PDF_NAME_DV);
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
if (dv)
pdf_dict_put(ctx, field, PDF_NAME_V, dv);
else
pdf_dict_del(ctx, field, PDF_NAME_V);
if (kids == NULL)
{
/* The leaves of the tree are widget annotations
* In some cases we need to update the appearance state;
* in others we need to mark the field as dirty so that
* the appearance stream will be regenerated. */
switch (pdf_field_type(ctx, doc, field))
{
case PDF_WIDGET_TYPE_RADIOBUTTON:
case PDF_WIDGET_TYPE_CHECKBOX:
{
pdf_obj *leafv = pdf_get_inheritable(ctx, doc, field, PDF_NAME_V);
if (leafv)
pdf_keep_obj(ctx, leafv);
else
leafv = PDF_NAME_Off;
pdf_dict_put_drop(ctx, field, PDF_NAME_AS, leafv);
}
break;
case PDF_WIDGET_TYPE_PUSHBUTTON:
break;
default:
pdf_field_mark_dirty(ctx, doc, field);
break;
}
}
if (pdf_field_dirties_document(ctx, doc, field))
doc->dirty = 1;
}
void pdf_field_reset(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
reset_form_field(ctx, doc, field);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
pdf_field_reset(ctx, doc, pdf_array_get(ctx, kids, i));
}
}
static void add_field_hierarchy_to_array(fz_context *ctx, pdf_obj *array, pdf_obj *field)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
pdf_obj *exclude = pdf_dict_get(ctx, field, PDF_NAME_Exclude);
if (exclude)
return;
pdf_array_push(ctx, array, field);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(ctx, array, pdf_array_get(ctx, 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(fz_context *ctx, pdf_document *doc, pdf_obj *fields, int exclude)
{
pdf_obj *form = pdf_dict_getl(ctx, pdf_trailer(ctx, doc), PDF_NAME_Root, PDF_NAME_AcroForm, PDF_NAME_Fields, NULL);
int i, n;
pdf_obj *result = pdf_new_array(ctx, doc, 0);
pdf_obj *nil = NULL;
fz_var(nil);
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, doc);
n = pdf_array_len(ctx, fields);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(ctx, fields, i);
if (pdf_is_string(ctx, field))
field = pdf_lookup_field(ctx, form, pdf_to_str_buf(ctx, field));
if (field)
pdf_dict_put(ctx, field, PDF_NAME_Exclude, nil);
}
/* Act upon all unmarked fields */
n = pdf_array_len(ctx, form);
for (i = 0; i < n; i++)
add_field_hierarchy_to_array(ctx, result, pdf_array_get(ctx, form, i));
/* Unmark the marked fields */
n = pdf_array_len(ctx, fields);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(ctx, fields, i);
if (pdf_is_string(ctx, field))
field = pdf_lookup_field(ctx, form, pdf_to_str_buf(ctx, field));
if (field)
pdf_dict_del(ctx, field, PDF_NAME_Exclude);
}
}
else
{
n = pdf_array_len(ctx, fields);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(ctx, fields, i);
if (pdf_is_string(ctx, field))
field = pdf_lookup_field(ctx, form, pdf_to_str_buf(ctx, field));
if (field)
add_field_hierarchy_to_array(ctx, result, field);
}
}
}
fz_always(ctx)
{
pdf_drop_obj(ctx, nil);
}
fz_catch(ctx)
{
pdf_drop_obj(ctx, result);
fz_rethrow(ctx);
}
return result;
}
static void reset_form(fz_context *ctx, pdf_document *doc, pdf_obj *fields, int exclude)
{
pdf_obj *sfields = specified_fields(ctx, doc, fields, exclude);
fz_try(ctx)
{
int i, n = pdf_array_len(ctx, sfields);
for (i = 0; i < n; i++)
reset_form_field(ctx, doc, pdf_array_get(ctx, sfields, i));
}
fz_always(ctx)
{
pdf_drop_obj(ctx, sfields);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static void execute_action(fz_context *ctx, pdf_document *doc, pdf_obj *obj, pdf_obj *a)
{
if (a)
{
pdf_obj *type = pdf_dict_get(ctx, a, PDF_NAME_S);
if (pdf_name_eq(ctx, type, PDF_NAME_JavaScript))
{
pdf_obj *js = pdf_dict_get(ctx, a, PDF_NAME_JS);
if (js)
{
char *code = pdf_load_stream_or_string_as_utf8(ctx, js);
fz_try(ctx)
{
pdf_js_execute(doc->js, code);
}
fz_always(ctx)
{
fz_free(ctx, code);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
}
else if (pdf_name_eq(ctx, type, PDF_NAME_ResetForm))
{
reset_form(ctx, doc, pdf_dict_get(ctx, a, PDF_NAME_Fields), pdf_to_int(ctx, pdf_dict_get(ctx, a, PDF_NAME_Flags)) & 1);
}
else if (pdf_name_eq(ctx, type, PDF_NAME_Named))
{
pdf_obj *name = pdf_dict_get(ctx, a, PDF_NAME_N);
if (pdf_name_eq(ctx, name, PDF_NAME_Print))
pdf_event_issue_print(ctx, doc);
}
}
}
static void execute_action_chain(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
pdf_obj *a = pdf_dict_get(ctx, obj, PDF_NAME_A);
pdf_js_event e;
e.target = obj;
e.value = "";
pdf_js_setup_event(doc->js, &e);
while (a)
{
execute_action(ctx, doc, obj, a);
a = pdf_dict_get(ctx, a, PDF_NAME_Next);
}
}
static void execute_additional_action(fz_context *ctx, pdf_document *doc, pdf_obj *obj, char *act)
{
pdf_obj *a = pdf_dict_getp(ctx, obj, act);
if (a)
{
pdf_js_event e;
e.target = obj;
e.value = "";
pdf_js_setup_event(doc->js, &e);
execute_action(ctx, doc, obj, a);
}
}
static void check_off(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
pdf_dict_put(ctx, obj, PDF_NAME_AS, PDF_NAME_Off);
}
static void set_check(fz_context *ctx, pdf_document *doc, pdf_obj *chk, pdf_obj *name)
{
pdf_obj *n = pdf_dict_getp(ctx, chk, "AP/N");
pdf_obj *val;
/* If name is a possible value of this check
* box then use it, otherwise use "Off" */
if (pdf_dict_get(ctx, n, name))
val = name;
else
val = PDF_NAME_Off;
pdf_dict_put(ctx, chk, PDF_NAME_AS, val);
}
/* Set the values of all fields in a group defined by a node
* in the hierarchy */
static void set_check_grp(fz_context *ctx, pdf_document *doc, pdf_obj *grp, pdf_obj *val)
{
pdf_obj *kids = pdf_dict_get(ctx, grp, PDF_NAME_Kids);
if (kids == NULL)
{
set_check(ctx, doc, grp, val);
}
else
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
set_check_grp(ctx, doc, pdf_array_get(ctx, kids, i), val);
}
}
static void recalculate(fz_context *ctx, pdf_document *doc)
{
if (doc->recalculating)
return;
doc->recalculating = 1;
fz_try(ctx)
{
pdf_obj *co = pdf_dict_getp(ctx, pdf_trailer(ctx, doc), "Root/AcroForm/CO");
if (co && doc->js)
{
int i, n = pdf_array_len(ctx, co);
for (i = 0; i < n; i++)
{
pdf_obj *field = pdf_array_get(ctx, co, i);
pdf_obj *calc = pdf_dict_getp(ctx, field, "AA/C");
if (calc)
{
pdf_js_event e;
e.target = field;
e.value = pdf_field_value(ctx, doc, field);
pdf_js_setup_event(doc->js, &e);
execute_action(ctx, doc, field, calc);
/* A calculate action, updates event.value. We need
* to place the value in the field */
update_field_value(ctx, doc, field, pdf_js_get_event(doc->js)->value);
}
}
}
}
fz_always(ctx)
{
doc->recalculating = 0;
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
static void toggle_check_box(fz_context *ctx, pdf_document *doc, pdf_obj *obj)
{
pdf_obj *as = pdf_dict_get(ctx, obj, PDF_NAME_AS);
int ff = pdf_get_field_flags(ctx, doc, obj);
int radio = ((ff & (Ff_Pushbutton|Ff_Radio)) == Ff_Radio);
char *val = NULL;
pdf_obj *grp = radio ? pdf_dict_get(ctx, obj, PDF_NAME_Parent) : find_head_of_field_group(ctx, obj);
if (!grp)
grp = obj;
if (as && !pdf_name_eq(ctx, as, PDF_NAME_Off))
{
/* "as" neither missing nor set to Off. Set it to Off, unless
* this is a non-toggle-off radio button. */
if ((ff & (Ff_Pushbutton|Ff_NoToggleToOff|Ff_Radio)) != (Ff_NoToggleToOff|Ff_Radio))
{
check_off(ctx, doc, obj);
val = "Off";
}
}
else
{
pdf_obj *n, *key = NULL;
int len, i;
n = pdf_dict_getp(ctx, obj, "AP/N");
/* Look for a key that isn't "Off" */
len = pdf_dict_len(ctx, n);
for (i = 0; i < len; i++)
{
key = pdf_dict_get_key(ctx, n, i);
if (pdf_is_name(ctx, key) && !pdf_name_eq(ctx, key, PDF_NAME_Off))
break;
}
/* If we found no alternative value to Off then we have no value to use */
if (!key)
return;
if (radio)
{
/* For radio buttons, first turn off all buttons in the group and
* then set the one that was clicked */
pdf_obj *kids = pdf_dict_get(ctx, grp, PDF_NAME_Kids);
len = pdf_array_len(ctx, kids);
for (i = 0; i < len; i++)
check_off(ctx, doc, pdf_array_get(ctx, kids, i));
pdf_dict_put(ctx, obj, PDF_NAME_AS, key);
}
else
{
/* For check boxes, we have located the node of the field hierarchy
* below which all fields share a name with the clicked one. Set
* all to the same value. This may cause the group to act like
* radio buttons, if each have distinct "On" values */
if (grp)
set_check_grp(ctx, doc, grp, key);
else
set_check(ctx, doc, obj, key);
}
}
if (val && grp)
{
pdf_obj *v = pdf_new_string(ctx, doc, val, strlen(val));
pdf_dict_put_drop(ctx, grp, PDF_NAME_V, v);
recalculate(ctx, doc);
}
}
int pdf_has_unsaved_changes(fz_context *ctx, pdf_document *doc)
{
return doc->dirty;
}
int pdf_pass_event(fz_context *ctx, pdf_document *doc, pdf_page *page, pdf_ui_event *ui_event)
{
pdf_annot *annot;
pdf_hotspot *hp = &doc->hotspot;
fz_point *pt = &(ui_event->event.pointer.pt);
int changed = 0;
fz_rect bbox;
if (page == NULL)
return 0;
for (annot = page->annots; annot; annot = annot->next)
{
pdf_bound_annot(ctx, annot, &bbox);
if (pt->x >= bbox.x0 && pt->x <= bbox.x1)
if (pt->y >= bbox.y0 && pt->y <= bbox.y1)
break;
}
/* Skip hidden annotations. */
if (annot)
{
int f = pdf_to_int(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_F));
if (f & (PDF_ANNOT_IS_HIDDEN|PDF_ANNOT_IS_NO_VIEW))
annot = NULL;
}
/* Skip Link annotations. */
if (annot)
{
if (pdf_name_eq(ctx, pdf_dict_get(ctx, annot->obj, PDF_NAME_Subtype), PDF_NAME_Link))
annot = NULL;
}
switch (ui_event->etype)
{
case PDF_EVENT_TYPE_POINTER:
{
switch (ui_event->event.pointer.ptype)
{
case PDF_POINTER_DOWN:
if (doc->focus_obj)
{
/* Execute the blur action */
execute_additional_action(ctx, doc, doc->focus_obj, "AA/Bl");
doc->focus = NULL;
pdf_drop_obj(ctx, doc->focus_obj);
doc->focus_obj = NULL;
}
if (annot)
{
doc->focus = annot;
doc->focus_obj = pdf_keep_obj(ctx, annot->obj);
hp->num = pdf_to_num(ctx, annot->obj);
hp->state = HOTSPOT_POINTER_DOWN;
changed = 1;
/* Execute the down and focus actions */
execute_additional_action(ctx, doc, annot->obj, "AA/Fo");
execute_additional_action(ctx, doc, annot->obj, "AA/D");
}
break;
case PDF_POINTER_UP:
if (hp->state != 0)
changed = 1;
hp->num = 0;
hp->state = 0;
if (annot)
{
switch (pdf_widget_type(ctx, (pdf_widget*)annot))
{
case PDF_WIDGET_TYPE_RADIOBUTTON:
case PDF_WIDGET_TYPE_CHECKBOX:
/* FIXME: treating radio buttons like check boxes, for now */
toggle_check_box(ctx, doc, annot->obj);
changed = 1;
break;
}
/* Execute the up action */
execute_additional_action(ctx, doc, annot->obj, "AA/U");
/* Execute the main action chain */
execute_action_chain(ctx, doc, annot->obj);
}
break;
}
}
break;
}
return changed;
}
void pdf_update_page(fz_context *ctx, pdf_page *page)
{
pdf_annot *annot;
/* Mark all dirty annots as clean */
for (annot = page->annots; annot; annot = annot->next)
pdf_clean_annot(ctx, annot);
/* Flag all dirty annots */
for (annot = page->annots; annot; annot = annot->next)
{
pdf_xobject *ap = pdf_keep_xobject(ctx, annot->ap);
int ap_iteration = annot->ap_iteration;
fz_try(ctx)
{
pdf_update_annot(ctx, annot);
if ((ap != annot->ap || ap_iteration != annot->ap_iteration))
pdf_dirty_annot(ctx, annot);
}
fz_always(ctx)
pdf_drop_xobject(ctx, ap);
fz_catch(ctx)
fz_rethrow(ctx);
}
}
pdf_widget *pdf_focused_widget(fz_context *ctx, pdf_document *doc)
{
return (pdf_widget *)doc->focus;
}
pdf_widget *pdf_first_widget(fz_context *ctx, pdf_document *doc, pdf_page *page)
{
pdf_annot *annot = page->annots;
while (annot && pdf_annot_type(ctx, annot) != PDF_ANNOT_WIDGET)
annot = annot->next;
return (pdf_widget *)annot;
}
pdf_widget *pdf_next_widget(fz_context *ctx, pdf_widget *previous)
{
pdf_annot *annot = (pdf_annot *)previous;
if (annot)
annot = annot->next;
while (annot && pdf_annot_type(ctx, annot) != PDF_ANNOT_WIDGET)
annot = annot->next;
return (pdf_widget *)annot;
}
pdf_widget *pdf_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(ctx, page, PDF_ANNOT_WIDGET);
fz_try(ctx)
{
pdf_set_field_type(ctx, doc, annot->obj, type);
pdf_dict_put_string(ctx, annot->obj, PDF_NAME_T, fieldname, strlen(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, doc, 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);
/* An empty Fields array may have been created, but that is harmless */
if (type == PDF_WIDGET_TYPE_SIGNATURE)
pdf_dict_putl_drop(ctx, pdf_trailer(ctx, doc), pdf_new_int(ctx, doc, old_sigflags), PDF_NAME_Root, PDF_NAME_AcroForm, PDF_NAME_SigFlags, NULL);
fz_rethrow(ctx);
}
return (pdf_widget *)annot;
}
int pdf_widget_type(fz_context *ctx, pdf_widget *widget)
{
pdf_annot *annot = (pdf_annot *)widget;
if (pdf_annot_type(ctx, annot) == PDF_ANNOT_WIDGET)
return pdf_field_type(ctx, pdf_get_bound_document(ctx, annot->obj), annot->obj);
return PDF_WIDGET_TYPE_NOT_WIDGET;
}
static int set_text_field_value(fz_context *ctx, pdf_document *doc, pdf_obj *field, const char *text)
{
pdf_obj *v = pdf_dict_getp(ctx, field, "AA/V");
if (v && doc->js)
{
pdf_js_event e;
e.target = field;
e.value = fz_strdup(ctx, text);
pdf_js_setup_event(doc->js, &e);
execute_action(ctx, doc, field, v);
if (!pdf_js_get_event(doc->js)->rc)
return 0;
text = pdf_js_get_event(doc->js)->value;
}
if (pdf_field_dirties_document(ctx, doc, field))
doc->dirty = 1;
update_field_value(ctx, doc, field, text);
return 1;
}
static void update_checkbox_selector(fz_context *ctx, pdf_document *doc, pdf_obj *field, const char *val)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
if (kids)
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
update_checkbox_selector(ctx, doc, pdf_array_get(ctx, kids, i), val);
}
else
{
pdf_obj *n = pdf_dict_getp(ctx, field, "AP/N");
pdf_obj *oval;
if (pdf_dict_gets(ctx, n, val))
oval = pdf_new_name(ctx, doc, val);
else
oval = PDF_NAME_Off;
pdf_dict_put_drop(ctx, field, PDF_NAME_AS, oval);
}
}
static int set_checkbox_value(fz_context *ctx, pdf_document *doc, pdf_obj *field, const char *val)
{
update_checkbox_selector(ctx, doc, field, val);
update_field_value(ctx, doc, field, val);
return 1;
}
int pdf_field_set_value(fz_context *ctx, pdf_document *doc, pdf_obj *field, const char *text)
{
int res = 0;
switch (pdf_field_type(ctx, doc, field))
{
case PDF_WIDGET_TYPE_TEXT:
res = set_text_field_value(ctx, doc, field, text);
break;
case PDF_WIDGET_TYPE_CHECKBOX:
case PDF_WIDGET_TYPE_RADIOBUTTON:
res = set_checkbox_value(ctx, doc, field, text);
break;
default:
/* text updater will do in most cases */
update_field_value(ctx, doc, field, text);
res = 1;
break;
}
recalculate(ctx, doc);
return res;
}
char *pdf_field_border_style(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
const char *bs = pdf_to_name(ctx, pdf_dict_getl(ctx, field, PDF_NAME_BS, PDF_NAME_S, NULL));
switch (*bs)
{
case 'S': return "Solid";
case 'D': return "Dashed";
case 'B': return "Beveled";
case 'I': return "Inset";
case 'U': return "Underline";
}
return "Solid";
}
void pdf_field_set_border_style(fz_context *ctx, pdf_document *doc, pdf_obj *field, const char *text)
{
pdf_obj *val;
if (!strcmp(text, "Solid"))
val = PDF_NAME_S;
else if (!strcmp(text, "Dashed"))
val = PDF_NAME_D;
else if (!strcmp(text, "Beveled"))
val = PDF_NAME_B;
else if (!strcmp(text, "Inset"))
val = PDF_NAME_I;
else if (!strcmp(text, "Underline"))
val = PDF_NAME_U;
else
return;
pdf_dict_putl_drop(ctx, field, val, PDF_NAME_BS, PDF_NAME_S, NULL);
pdf_field_mark_dirty(ctx, doc, field);
}
void pdf_field_set_button_caption(fz_context *ctx, pdf_document *doc, pdf_obj *field, const char *text)
{
if (pdf_field_type(ctx, doc, field) == PDF_WIDGET_TYPE_PUSHBUTTON)
{
pdf_obj *val = pdf_new_string(ctx, doc, text, strlen(text));
pdf_dict_putl_drop(ctx, field, val, PDF_NAME_MK, PDF_NAME_CA, NULL);
pdf_field_mark_dirty(ctx, doc, field);
}
}
int pdf_field_display(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
pdf_obj *kids;
int f, res = Display_Visible;
/* Base response on first of children. Not ideal,
* but not clear how to handle children with
* differing values */
while ((kids = pdf_dict_get(ctx, field, PDF_NAME_Kids)) != NULL)
field = pdf_array_get(ctx, kids, 0);
f = pdf_to_int(ctx, pdf_dict_get(ctx, field, PDF_NAME_F));
if (f & PDF_ANNOT_IS_HIDDEN)
{
res = Display_Hidden;
}
else if (f & PDF_ANNOT_IS_PRINT)
{
if (f & PDF_ANNOT_IS_NO_VIEW)
res = Display_NoView;
}
else
{
if (f & PDF_ANNOT_IS_NO_VIEW)
res = Display_Hidden;
else
res = Display_NoPrint;
}
return res;
}
/*
* get the field name in a char buffer that has spare room to
* add more characters at the end.
*/
static char *get_field_name(fz_context *ctx, pdf_document *doc, pdf_obj *field, int spare)
{
char *res = NULL;
pdf_obj *parent = pdf_dict_get(ctx, field, PDF_NAME_Parent);
char *lname = pdf_to_str_buf(ctx, pdf_dict_get(ctx, field, PDF_NAME_T));
int llen = (int)strlen(lname);
/*
* If we found a name at this point in the field hierarchy
* then we'll need extra space for it and a dot
*/
if (llen)
spare += llen+1;
if (parent)
{
res = get_field_name(ctx, doc, parent, spare);
}
else
{
res = fz_malloc(ctx, spare+1);
res[0] = 0;
}
if (llen)
{
if (res[0])
strcat(res, ".");
strcat(res, lname);
}
return res;
}
char *pdf_field_name(fz_context *ctx, pdf_document *doc, pdf_obj *field)
{
return get_field_name(ctx, doc, field, 0);
}
void pdf_field_set_display(fz_context *ctx, pdf_document *doc, pdf_obj *field, int d)
{
pdf_obj *kids = pdf_dict_get(ctx, field, PDF_NAME_Kids);
if (!kids)
{
int mask = (PDF_ANNOT_IS_HIDDEN|PDF_ANNOT_IS_PRINT|PDF_ANNOT_IS_NO_VIEW);
int f = pdf_to_int(ctx, pdf_dict_get(ctx, field, PDF_NAME_F)) & ~mask;
pdf_obj *fo;
switch (d)
{
case Display_Visible:
f |= PDF_ANNOT_IS_PRINT;
break;
case Display_Hidden:
f |= PDF_ANNOT_IS_HIDDEN;
break;
case Display_NoView:
f |= (PDF_ANNOT_IS_PRINT|PDF_ANNOT_IS_NO_VIEW);
break;
case Display_NoPrint:
break;
}
fo = pdf_new_int(ctx, doc, f);
pdf_dict_put_drop(ctx, field, PDF_NAME_F, fo);
}
else
{
int i, n = pdf_array_len(ctx, kids);
for (i = 0; i < n; i++)
pdf_field_set_display(ctx, doc, pdf_array_get(ctx, kids, i), d);
}
}
void pdf_field_set_fill_color(fz_context *ctx, pdf_document *doc, pdf_obj *field, pdf_obj *col)
{
/* col == NULL mean transparent, but we can simply pass it on as with
* non-NULL values because pdf_dict_putp interprets a NULL value as
* delete */
pdf_dict_putl(ctx, field, col, PDF_NAME_MK, PDF_NAME_BG, NULL);
pdf_field_mark_dirty(ctx, doc, field);
}
void pdf_field_set_text_color(fz_context *ctx, pdf_document *doc, pdf_obj *field, pdf_obj *col)
{
pdf_da_info di;
fz_buffer *fzbuf = NULL;
char *da = pdf_to_str_buf(ctx, pdf_get_inheritable(ctx, doc, field, PDF_NAME_DA));
unsigned char *buf;
int ilen;
size_t len;
pdf_obj *daobj;
memset(&di, 0, sizeof(di));
fz_var(fzbuf);
fz_var(di);
fz_try(ctx)
{
int i;
pdf_parse_da(ctx, da, &di);
di.col_size = pdf_array_len(ctx, col);
ilen = fz_mini(di.col_size, (int)nelem(di.col));
for (i = 0; i < ilen; i++)
di.col[i] = pdf_to_real(ctx, pdf_array_get(ctx, col, i));
fzbuf = fz_new_buffer(ctx, 0);
pdf_fzbuf_print_da(ctx, fzbuf, &di);
len = fz_buffer_storage(ctx, fzbuf, &buf);
daobj = pdf_new_string(ctx, doc, (char *)buf, len);
pdf_dict_put_drop(ctx, field, PDF_NAME_DA, daobj);
pdf_field_mark_dirty(ctx, doc, field);
}
fz_always(ctx)
{
pdf_da_info_fin(ctx, &di);
fz_drop_buffer(ctx, fzbuf);
}
fz_catch(ctx)
{
fz_warn(ctx, "%s", fz_caught_message(ctx));
}
}
fz_rect *pdf_bound_widget(fz_context *ctx, pdf_widget *widget, fz_rect *rect)
{
return pdf_bound_annot(ctx, (pdf_annot*)widget, rect);
}
char *pdf_text_widget_text(fz_context *ctx, pdf_document *doc, pdf_widget *tw)
{
pdf_annot *annot = (pdf_annot *)tw;
char *text = NULL;
fz_var(text);
fz_try(ctx)
{
text = pdf_field_value(ctx, doc, annot->obj);
}
fz_catch(ctx)
{
fz_warn(ctx, "failed allocation in fz_text_widget_text");
}
return text;
}
int pdf_text_widget_max_len(fz_context *ctx, pdf_document *doc, pdf_widget *tw)
{
pdf_annot *annot = (pdf_annot *)tw;
return pdf_to_int(ctx, pdf_get_inheritable(ctx, doc, annot->obj, PDF_NAME_MaxLen));
}
int pdf_text_widget_content_type(fz_context *ctx, pdf_document *doc, pdf_widget *tw)
{
pdf_annot *annot = (pdf_annot *)tw;
char *code = NULL;
int type = PDF_WIDGET_CONTENT_UNRESTRAINED;
fz_var(code);
fz_try(ctx)
{
code = pdf_get_string_or_stream(ctx, doc, pdf_dict_getl(ctx, annot->obj, PDF_NAME_AA, PDF_NAME_F, PDF_NAME_JS, NULL));
if (code)
{
if (strstr(code, "AFNumber_Format"))
type = PDF_WIDGET_CONTENT_NUMBER;
else if (strstr(code, "AFSpecial_Format"))
type = PDF_WIDGET_CONTENT_SPECIAL;
else if (strstr(code, "AFDate_FormatEx"))
type = PDF_WIDGET_CONTENT_DATE;
else if (strstr(code, "AFTime_FormatEx"))
type = PDF_WIDGET_CONTENT_TIME;
}
}
fz_always(ctx)
{
fz_free(ctx, code);
}
fz_catch(ctx)
{
fz_warn(ctx, "failure in fz_text_widget_content_type");
}
return type;
}
static int run_keystroke(fz_context *ctx, pdf_document *doc, pdf_obj *field, char **text)
{
pdf_obj *k = pdf_dict_getl(ctx, field, PDF_NAME_AA, PDF_NAME_K, NULL);
if (k && doc->js)
{
pdf_js_event e;
e.target = field;
e.value = *text;
pdf_js_setup_event(doc->js, &e);
execute_action(ctx, doc, field, k);
if (!pdf_js_get_event(doc->js)->rc)
return 0;
*text = pdf_js_get_event(doc->js)->value;
}
return 1;
}
int pdf_text_widget_set_text(fz_context *ctx, pdf_document *doc, pdf_widget *tw, char *text)
{
pdf_annot *annot = (pdf_annot *)tw;
int accepted = 0;
fz_try(ctx)
{
accepted = run_keystroke(ctx, doc, annot->obj, &text);
if (accepted)
accepted = pdf_field_set_value(ctx, doc, annot->obj, text);
}
fz_catch(ctx)
{
fz_warn(ctx, "fz_text_widget_set_text failed");
}
return accepted;
}
/* Get either the listed value or the export value. */
int pdf_choice_widget_options(fz_context *ctx, pdf_document *doc, pdf_widget *tw, int exportval, char *opts[])
{
pdf_annot *annot = (pdf_annot *)tw;
pdf_obj *optarr;
int i, n, m;
if (!annot)
return 0;
optarr = pdf_dict_get(ctx, annot->obj, PDF_NAME_Opt);
n = pdf_array_len(ctx, optarr);
if (opts)
{
for (i = 0; i < n; i++)
{
m = pdf_array_len(ctx, pdf_array_get(ctx, optarr, i));
/* If it is a two element array, the second item is the one that we want if we want the listing value. */
if (m == 2)
if (exportval)
opts[i] = pdf_to_str_buf(ctx, pdf_array_get(ctx, pdf_array_get(ctx, optarr, i), 0));
else
opts[i] = pdf_to_str_buf(ctx, pdf_array_get(ctx, pdf_array_get(ctx, optarr, i), 1));
else
opts[i] = pdf_to_str_buf(ctx, pdf_array_get(ctx, optarr, i));
}
}
return n;
}
int pdf_choice_widget_is_multiselect(fz_context *ctx, pdf_document *doc, pdf_widget *tw)
{
pdf_annot *annot = (pdf_annot *)tw;
if (!annot) return 0;
switch (pdf_field_type(ctx, doc, annot->obj))
{
case PDF_WIDGET_TYPE_LISTBOX:
case PDF_WIDGET_TYPE_COMBOBOX:
return (pdf_get_field_flags(ctx, doc, annot->obj) & Ff_MultiSelect) != 0;
default:
return 0;
}
}
int pdf_choice_widget_value(fz_context *ctx, pdf_document *doc, pdf_widget *tw, char *opts[])
{
pdf_annot *annot = (pdf_annot *)tw;
pdf_obj *optarr;
int i, n;
if (!annot)
return 0;
optarr = pdf_dict_get(ctx, annot->obj, PDF_NAME_V);
if (pdf_is_string(ctx, optarr))
{
if (opts)
opts[0] = pdf_to_str_buf(ctx, optarr);
return 1;
}
else
{
n = pdf_array_len(ctx, optarr);
if (opts)
{
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);
opts[i] = pdf_to_str_buf(ctx, elem);
}
}
return n;
}
}
void pdf_choice_widget_set_value(fz_context *ctx, pdf_document *doc, pdf_widget *tw, int n, char *opts[])
{
pdf_annot *annot = (pdf_annot *)tw;
pdf_obj *optarr = NULL, *opt;
int i;
if (!annot)
return;
fz_var(optarr);
fz_try(ctx)
{
if (n != 1)
{
optarr = pdf_new_array(ctx, doc, n);
for (i = 0; i < n; i++)
{
opt = pdf_new_string(ctx, doc, opts[i], strlen(opts[i]));
pdf_array_push_drop(ctx, optarr, opt);
}
pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_V, optarr);
}
else
{
opt = pdf_new_string(ctx, doc, opts[0], strlen(opts[0]));
pdf_dict_put_drop(ctx, annot->obj, PDF_NAME_V, opt);
}
/* FIXME: when n > 1, we should be regenerating the indexes */
pdf_dict_del(ctx, annot->obj, PDF_NAME_I);
pdf_field_mark_dirty(ctx, doc, annot->obj);
if (pdf_field_dirties_document(ctx, doc, annot->obj))
doc->dirty = 1;
}
fz_catch(ctx)
{
pdf_drop_obj(ctx, optarr);
fz_rethrow(ctx);
}
}
int pdf_signature_widget_byte_range(fz_context *ctx, pdf_document *doc, pdf_widget *widget, fz_range *byte_range)
{
pdf_annot *annot = (pdf_annot *)widget;
pdf_obj *br = pdf_dict_getl(ctx, annot->obj, PDF_NAME_V, PDF_NAME_ByteRange, NULL);
int i, n = pdf_array_len(ctx, br)/2;
if (byte_range)
{
for (i = 0; i < n; i++)
{
byte_range[i].offset = pdf_to_int(ctx, pdf_array_get(ctx, br, 2*i));
byte_range[i].len = pdf_to_int(ctx, pdf_array_get(ctx, br, 2*i+1));
}
}
return n;
}
fz_stream *pdf_signature_widget_hash_bytes(fz_context *ctx, pdf_document *doc, pdf_widget *widget)
{
fz_range *byte_range = NULL;
int byte_range_len;
fz_stream *bytes = NULL;
fz_var(byte_range);
fz_try(ctx)
{
byte_range_len = pdf_signature_widget_byte_range(ctx, doc, widget, NULL);
if (byte_range_len)
{
byte_range = fz_calloc(ctx, byte_range_len, sizeof(*byte_range));
pdf_signature_widget_byte_range(ctx, doc, widget, byte_range);
}
bytes = fz_open_null_n(ctx, fz_keep_stream(ctx, doc->file), byte_range, byte_range_len);
}
fz_always(ctx)
{
fz_free(ctx, byte_range);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
return bytes;
}
int pdf_signature_widget_contents(fz_context *ctx, pdf_document *doc, pdf_widget *widget, char **contents)
{
pdf_annot *annot = (pdf_annot *)widget;
pdf_obj *c = pdf_dict_getl(ctx, annot->obj, PDF_NAME_V, PDF_NAME_Contents, NULL);
if (contents)
*contents = pdf_to_str_buf(ctx, c);
return pdf_to_str_len(ctx, c);
}
void pdf_signature_set_value(fz_context *ctx, pdf_document *doc, pdf_obj *field, pdf_pkcs7_signer *signer)
{
pdf_obj *v = NULL;
pdf_obj *indv;
int vnum;
pdf_obj *byte_range;
pdf_obj *contents;
char buf[2048];
memset(buf, 0, sizeof(buf));
vnum = pdf_create_object(ctx, doc);
indv = pdf_new_indirect(ctx, doc, vnum, 0);
pdf_dict_put_drop(ctx, field, PDF_NAME_V, indv);
fz_var(v);
fz_try(ctx)
{
v = pdf_new_dict(ctx, doc, 4);
pdf_update_object(ctx, doc, vnum, v);
}
fz_always(ctx)
{
pdf_drop_obj(ctx, v);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
byte_range = pdf_new_array(ctx, doc, 4);
pdf_dict_put_drop(ctx, v, PDF_NAME_ByteRange, byte_range);
contents = pdf_new_string(ctx, doc, buf, sizeof(buf));
pdf_dict_put_drop(ctx, v, PDF_NAME_Contents, contents);
pdf_dict_put(ctx, v, PDF_NAME_Filter, PDF_NAME_Adobe_PPKLite);
pdf_dict_put(ctx, v, PDF_NAME_SubFilter, PDF_NAME_adbe_pkcs7_detached);
/* Record details within the document structure so that contents
* and byte_range can be updated with their correct values at
* saving time */
pdf_xref_store_unsaved_signature(ctx, doc, field, signer);
}
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