freebsd-dev/contrib/ncurses/c++/cursesf.h

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// * This makes emacs happy -*-Mode: C++;-*-
/****************************************************************************
* Copyright (c) 1998,1999,2000,2001 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1997 *
****************************************************************************/
// $Id: cursesf.h,v 1.16 2001/07/15 00:02:53 tom Exp $
#ifndef NCURSES_CURSESF_H_incl
#define NCURSES_CURSESF_H_incl 1
#include <cursesp.h>
#include <string.h>
extern "C" {
# include <form.h>
}
//
// -------------------------------------------------------------------------
// The abstract base class for buitin and user defined Fieldtypes.
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP NCursesFormField; // forward declaration
// Class to represent builtin field types as well as C++ written new
// fieldtypes (see classes UserDefineFieldType...
class NCURSES_IMPEXP NCursesFieldType {
friend class NCursesFormField;
protected:
FIELDTYPE* fieldtype;
inline void OnError(int err) const THROWS(NCursesFormException) {
if (err!=E_OK)
THROW(new NCursesFormException (err));
}
NCursesFieldType(FIELDTYPE *f) : fieldtype(f) {
}
virtual ~NCursesFieldType() {}
// Set the fields f fieldtype to this one.
virtual void set(NCursesFormField& f) = 0;
public:
NCursesFieldType() : fieldtype((FIELDTYPE*)0) {
}
};
//
// -------------------------------------------------------------------------
// The class representing a forms field, wrapping the lowlevel FIELD struct
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP NCursesFormField {
friend class NCursesForm;
protected:
FIELD *field; // lowlevel structure
NCursesFieldType* ftype; // Associated field type
// Error handler
inline void OnError (int err) const THROWS(NCursesFormException) {
if (err != E_OK)
THROW(new NCursesFormException (err));
}
public:
// Create a 'Null' field. Can be used to delimit a field list
NCursesFormField()
: field((FIELD*)0), ftype((NCursesFieldType*)0) {
}
// Create a new field
NCursesFormField (int rows,
int cols,
int first_row = 0,
int first_col = 0,
int offscreen_rows = 0,
int additional_buffers = 0)
: ftype((NCursesFieldType*)0) {
field = ::new_field(rows,cols,first_row,first_col,
offscreen_rows, additional_buffers);
if (!field)
OnError(errno);
}
virtual ~NCursesFormField ();
// Duplicate the field at a new position
inline NCursesFormField* dup(int first_row, int first_col) {
NCursesFormField* f = new NCursesFormField();
if (!f)
OnError(E_SYSTEM_ERROR);
else {
f->ftype = ftype;
f->field = ::dup_field(field,first_row,first_col);
if (!f->field)
OnError(errno);
}
return f;
}
// Link the field to a new location
inline NCursesFormField* link(int first_row, int first_col) {
NCursesFormField* f = new NCursesFormField();
if (!f)
OnError(E_SYSTEM_ERROR);
else {
f->ftype = ftype;
f->field = ::link_field(field,first_row,first_col);
if (!f->field)
OnError(errno);
}
return f;
}
// Get the lowlevel field representation
inline FIELD* get_field() const {
return field;
}
// Retrieve info about the field
inline void info(int& rows, int& cols,
int& first_row, int& first_col,
int& offscreen_rows, int& additional_buffers) const {
OnError(::field_info(field, &rows, &cols,
&first_row, &first_col,
&offscreen_rows, &additional_buffers));
}
// Retrieve info about the fields dynamic properties.
inline void dynamic_info(int& dynamic_rows, int& dynamic_cols,
int& max_growth) const {
OnError(::dynamic_field_info(field, &dynamic_rows, &dynamic_cols,
&max_growth));
}
// For a dynamic field you may set the maximum growth limit.
// A zero means unlimited growth.
inline void set_maximum_growth(int growth = 0) {
OnError(::set_max_field(field,growth));
}
// Move the field to a new position
inline void move(int row, int col) {
OnError(::move_field(field,row,col));
}
// Mark the field to start a new page
inline void new_page(bool pageFlag = FALSE) {
OnError(::set_new_page(field,pageFlag));
}
// Retrieve whether or not the field starts a new page.
inline bool is_new_page() const {
return ::new_page(field);
}
// Set the justification for the field
inline void set_justification(int just) {
OnError(::set_field_just(field,just));
}
// Retrieve the fields justification
inline int justification() const {
return ::field_just(field);
}
// Set the foreground attribute for the field
inline void set_foreground(chtype fore) {
OnError(::set_field_fore(field,fore));
}
// Retrieve the fields foreground attribute
inline chtype fore() const {
return ::field_fore(field);
}
// Set the background attribute for the field
inline void set_background(chtype back) {
OnError(::set_field_back(field,back));
}
// Retrieve the fields background attribute
inline chtype back() const {
return ::field_back(field);
}
// Set the padding character for the field
inline void set_pad_character(int pad) {
OnError(::set_field_pad(field,pad));
}
// Retrieve the fields padding character
inline int pad() const {
return ::field_pad(field);
}
// Switch on the fields options
inline void options_on (Field_Options options) {
OnError (::field_opts_on (field, options));
}
// Switch off the fields options
inline void options_off (Field_Options options) {
OnError (::field_opts_off (field, options));
}
// Retrieve the fields options
inline Field_Options options () const {
return ::field_opts (field);
}
// Set the fields options
inline void set_options (Field_Options options) {
OnError (::set_field_opts (field, options));
}
// Mark the field as changed
inline void set_changed(bool changeFlag = TRUE) {
OnError(::set_field_status(field,changeFlag));
}
// Test whether or not the field is marked as changed
inline bool changed() const {
return ::field_status(field);
}
// Return the index of the field in the field array of a form
// or -1 if the field is not associated to a form
inline int (index)() const {
return ::field_index(field);
}
// Store a value in a fields buffer. The default buffer is nr. 0
inline void set_value(const char *val, int buffer = 0) {
OnError(::set_field_buffer(field,buffer,val));
}
// Retrieve the value of a fields buffer. The default buffer is nr. 0
inline char* value(int buffer = 0) const {
return ::field_buffer(field,buffer);
}
// Set the validation type of the field.
inline void set_fieldtype(NCursesFieldType& f) {
ftype = &f;
f.set(*this); // A good friend may do that...
}
// Retrieve the validation type of the field.
inline NCursesFieldType* fieldtype() const {
return ftype;
}
};
//
// -------------------------------------------------------------------------
// The class representing a form, wrapping the lowlevel FORM struct
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP NCursesForm : public NCursesPanel {
protected:
FORM* form; // the lowlevel structure
private:
NCursesWindow* sub; // the subwindow object
bool b_sub_owner; // is this our own subwindow?
bool b_framed; // has the form a border?
bool b_autoDelete; // Delete fields when deleting form?
NCursesFormField** my_fields; // The array of fields for this form
// This structure is used for the form's user data field to link the
// FORM* to the C++ object and to provide extra space for a user pointer.
typedef struct {
void* m_user; // the pointer for the user's data
const NCursesForm* m_back; // backward pointer to C++ object
const FORM* m_owner;
} UserHook;
// Get the backward pointer to the C++ object from a FORM
static inline NCursesForm* getHook(const FORM *f) {
UserHook* hook = (UserHook*)::form_userptr(f);
assert(hook != 0 && hook->m_owner==f);
return (NCursesForm*)(hook->m_back);
}
// This are the built-in hook functions in this C++ binding. In C++ we use
// virtual member functions (see below On_..._Init and On_..._Termination)
// to provide this functionality in an object oriented manner.
static void frm_init(FORM *);
static void frm_term(FORM *);
static void fld_init(FORM *);
static void fld_term(FORM *);
// Calculate FIELD* array for the menu
FIELD** mapFields(NCursesFormField* nfields[]);
protected:
// internal routines
inline void set_user(void *user) {
UserHook* uptr = (UserHook*)::form_userptr (form);
assert (uptr != 0 && uptr->m_back==this && uptr->m_owner==form);
uptr->m_user = user;
}
inline void *get_user() {
UserHook* uptr = (UserHook*)::form_userptr (form);
assert (uptr != 0 && uptr->m_back==this && uptr->m_owner==form);
return uptr->m_user;
}
void InitForm (NCursesFormField* Fields[],
bool with_frame,
bool autoDeleteFields);
inline void OnError (int err) const THROWS(NCursesFormException) {
if (err != E_OK)
THROW(new NCursesFormException (err));
}
// this wraps the form_driver call.
virtual int driver (int c) ;
// 'Internal' constructor, builds an object without association to a
// field array.
NCursesForm( int lines,
int cols,
int begin_y = 0,
int begin_x = 0)
: NCursesPanel(lines,cols,begin_y,begin_x),
form ((FORM*)0) {
}
public:
// Create form for the default panel.
NCursesForm (NCursesFormField* Fields[],
bool with_frame=FALSE, // reserve space for a frame?
bool autoDelete_Fields=FALSE) // do automatic cleanup?
: NCursesPanel() {
InitForm(Fields, with_frame, autoDelete_Fields);
}
// Create a form in a panel with the given position and size.
NCursesForm (NCursesFormField* Fields[],
int lines,
int cols,
int begin_y,
int begin_x,
bool with_frame=FALSE, // reserve space for a frame?
bool autoDelete_Fields=FALSE) // do automatic cleanup?
: NCursesPanel(lines, cols, begin_y, begin_x) {
InitForm(Fields, with_frame, autoDelete_Fields);
}
virtual ~NCursesForm();
// Set the default attributes for the form
virtual void setDefaultAttributes();
// Retrieve current field of the form.
inline NCursesFormField* current_field() const {
return my_fields[::field_index(::current_field(form))];
}
// Set the forms subwindow
void setSubWindow(NCursesWindow& sub);
// Set these fields for the form
inline void setFields(NCursesFormField* Fields[]) {
OnError(::set_form_fields(form,mapFields(Fields)));
}
// Remove the form from the screen
inline void unpost (void) {
OnError (::unpost_form (form));
}
// Post the form to the screen if flag is true, unpost it otherwise
inline void post(bool flag = TRUE) {
OnError (flag ? ::post_form(form) : ::unpost_form (form));
}
// Decorations
inline void frame(const char *title=NULL, const char* btitle=NULL) {
if (b_framed)
NCursesPanel::frame(title,btitle);
else
OnError(E_SYSTEM_ERROR);
}
inline void boldframe(const char *title=NULL, const char* btitle=NULL) {
if (b_framed)
NCursesPanel::boldframe(title,btitle);
else
OnError(E_SYSTEM_ERROR);
}
inline void label(const char *topLabel, const char *bottomLabel) {
if (b_framed)
NCursesPanel::label(topLabel,bottomLabel);
else
OnError(E_SYSTEM_ERROR);
}
// -----
// Hooks
// -----
// Called after the form gets repositioned in its window.
// This is especially true if the form is posted.
virtual void On_Form_Init();
// Called before the form gets repositioned in its window.
// This is especially true if the form is unposted.
virtual void On_Form_Termination();
// Called after the field became the current field
virtual void On_Field_Init(NCursesFormField& field);
// Called before this field is left as current field.
virtual void On_Field_Termination(NCursesFormField& field);
// Calculate required window size for the form.
void scale(int& rows, int& cols) const {
OnError(::scale_form(form,&rows,&cols));
}
// Retrieve number of fields in the form.
int count() const {
return ::field_count(form);
}
// Make the page the current page of the form.
void set_page(int page) {
OnError(::set_form_page(form,page));
}
// Retrieve current page number
int page() const {
return ::form_page(form);
}
// Switch on the forms options
inline void options_on (Form_Options options) {
OnError (::form_opts_on (form, options));
}
// Switch off the forms options
inline void options_off (Form_Options options) {
OnError (::form_opts_off (form, options));
}
// Retrieve the forms options
inline Form_Options options () const {
return ::form_opts (form);
}
// Set the forms options
inline void set_options (Form_Options options) {
OnError (::set_form_opts (form, options));
}
// Are there more data in the current field after the data shown
inline bool data_ahead() const {
return ::data_ahead(form);
}
// Are there more data in the current field before the data shown
inline bool data_behind() const {
return ::data_behind(form);
}
// Position the cursor to the current field
inline void position_cursor () {
OnError (::pos_form_cursor (form));
}
// Set the current field
inline void set_current(NCursesFormField& F) {
OnError (::set_current_field(form, F.field));
}
// Provide a default key virtualization. Translate the keyboard
// code c into a form request code.
// The default implementation provides a hopefully straightforward
// mapping for the most common keystrokes and form requests.
virtual int virtualize(int c);
// Operators
inline NCursesFormField* operator[](int i) const {
if ( (i < 0) || (i >= ::field_count (form)) )
OnError (E_BAD_ARGUMENT);
return my_fields[i];
}
// Perform the menu's operation
// Return the field where you left the form.
virtual NCursesFormField* operator()(void);
// Exception handlers. The default is a Beep.
virtual void On_Request_Denied(int c) const;
virtual void On_Invalid_Field(int c) const;
virtual void On_Unknown_Command(int c) const;
};
//
// -------------------------------------------------------------------------
// This is the typical C++ typesafe way to allow to attach
// user data to a field of a form. Its assumed that the user
// data belongs to some class T. Use T as template argument
// to create a UserField.
// -------------------------------------------------------------------------
template<class T> class NCURSES_IMPEXP NCursesUserField : public NCursesFormField
{
public:
NCursesUserField (int rows,
int cols,
int first_row = 0,
int first_col = 0,
const T* p_UserData = (T*)0,
int offscreen_rows = 0,
int additional_buffers = 0)
: NCursesFormField (rows, cols,
first_row, first_col,
offscreen_rows, additional_buffers) {
if (field)
OnError(::set_field_userptr(field,(void *)p_UserData));
}
virtual ~NCursesUserField() {};
inline const T* UserData (void) const {
return (const T*)::field_userptr (field);
}
inline virtual void setUserData(const T* p_UserData) {
if (field)
OnError (::set_field_userptr (field, (void *)p_UserData));
}
};
//
// -------------------------------------------------------------------------
// The same mechanism is used to attach user data to a form
// -------------------------------------------------------------------------
//
template<class T> class NCURSES_IMPEXP NCursesUserForm : public NCursesForm
{
protected:
// 'Internal' constructor, builds an object without association to a
// field array.
NCursesUserForm( int lines,
int cols,
int begin_y = 0,
int begin_x = 0,
const T* p_UserData = (T*)0)
: NCursesForm(lines,cols,begin_y,begin_x) {
if (form)
set_user ((void *)p_UserData);
}
public:
NCursesUserForm (NCursesFormField Fields[],
bool with_frame=FALSE,
bool autoDelete_Fields=FALSE)
: NCursesForm (Fields, with_frame, autoDelete_Fields) {
};
NCursesUserForm (NCursesFormField Fields[],
const T* p_UserData = (T*)0,
bool with_frame=FALSE,
bool autoDelete_Fields=FALSE)
: NCursesForm (Fields, with_frame, autoDelete_Fields) {
if (form)
set_user ((void *)p_UserData);
};
NCursesUserForm (NCursesFormField Fields[],
int lines,
int cols,
int begin_y = 0,
int begin_x = 0,
const T* p_UserData = (T*)0,
bool with_frame=FALSE,
bool autoDelete_Fields=FALSE)
: NCursesForm (Fields, lines, cols, begin_y, begin_x,
with_frame, autoDelete_Fields) {
if (form)
set_user ((void *)p_UserData);
};
virtual ~NCursesUserForm() {
};
inline T* UserData (void) const {
return (T*)get_user ();
};
inline virtual void setUserData (const T* p_UserData) {
if (form)
set_user ((void *)p_UserData);
}
};
//
// -------------------------------------------------------------------------
// Builtin Fieldtypes
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP Alpha_Field : public NCursesFieldType {
private:
int min_field_width;
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,min_field_width));
}
public:
Alpha_Field(int width)
: NCursesFieldType(TYPE_ALPHA),
min_field_width(width) {
}
};
class NCURSES_IMPEXP Alphanumeric_Field : public NCursesFieldType {
private:
int min_field_width;
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,min_field_width));
}
public:
Alphanumeric_Field(int width)
: NCursesFieldType(TYPE_ALNUM),
min_field_width(width) {
}
};
class NCURSES_IMPEXP Integer_Field : public NCursesFieldType {
private:
int precision;
long lower_limit, upper_limit;
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,
precision,lower_limit,upper_limit));
}
public:
Integer_Field(int prec, long low=0L, long high=0L)
: NCursesFieldType(TYPE_INTEGER),
precision(prec), lower_limit(low), upper_limit(high) {
}
};
class NCURSES_IMPEXP Numeric_Field : public NCursesFieldType {
private:
int precision;
double lower_limit, upper_limit;
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,
precision,lower_limit,upper_limit));
}
public:
Numeric_Field(int prec, double low=0.0, double high=0.0)
: NCursesFieldType(TYPE_NUMERIC),
precision(prec), lower_limit(low), upper_limit(high) {
}
};
class NCURSES_IMPEXP Regular_Expression_Field : public NCursesFieldType {
private:
char* regex;
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,regex));
}
public:
Regular_Expression_Field(const char *expr)
: NCursesFieldType(TYPE_REGEXP) {
regex = new char[1 + ::strlen(expr)];
(::strcpy)(regex,expr);
}
~Regular_Expression_Field() {
delete[] regex;
}
};
class NCURSES_IMPEXP Enumeration_Field : public NCursesFieldType {
private:
char** list;
int case_sensitive;
int non_unique_matches;
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,
list,case_sensitive,non_unique_matches));
}
public:
Enumeration_Field(char* enums[],
bool case_sens=FALSE,
bool non_unique=FALSE)
: NCursesFieldType(TYPE_ENUM),
list(enums),
case_sensitive(case_sens?-1:0),
non_unique_matches(non_unique?-1:0) {
}
};
class NCURSES_IMPEXP IPV4_Address_Field : public NCursesFieldType {
private:
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype));
}
public:
IPV4_Address_Field() : NCursesFieldType(TYPE_IPV4) {
}
};
//
// -------------------------------------------------------------------------
// Abstract base class for User-Defined Fieldtypes
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP UserDefinedFieldType : public NCursesFieldType {
friend class UDF_Init; // Internal helper to set up statics
private:
// For all C++ defined fieldtypes we need only one generic lowlevel
// FIELDTYPE* element.
static FIELDTYPE* generic_fieldtype;
protected:
// This are the functions required by the low level libforms functions
// to construct a fieldtype.
static bool fcheck(FIELD *, const void*);
static bool ccheck(int c, const void *);
static void* makearg(va_list*);
void set(NCursesFormField& f) {
OnError(::set_field_type(f.get_field(),fieldtype,&f));
}
protected:
// Redefine this function to do a field validation. The argument
// is a reference to the field you should validate.
virtual bool field_check(NCursesFormField& f) = 0;
// Redefine this function to do a character validation. The argument
// is the character to be validated.
virtual bool char_check (int c) = 0;
public:
UserDefinedFieldType() : NCursesFieldType(generic_fieldtype) {
}
};
//
// -------------------------------------------------------------------------
// Abstract base class for User-Defined Fieldtypes with Choice functions
// -------------------------------------------------------------------------
//
class NCURSES_IMPEXP UserDefinedFieldType_With_Choice : public UserDefinedFieldType {
friend class UDF_Init; // Internal helper to set up statics
private:
// For all C++ defined fieldtypes with choice functions we need only one
// generic lowlevel FIELDTYPE* element.
static FIELDTYPE* generic_fieldtype_with_choice;
// This are the functions required by the low level libforms functions
// to construct a fieldtype with choice functions.
static bool next_choice(FIELD*, const void *);
static bool prev_choice(FIELD*, const void *);
protected:
// Redefine this function to do the retrieval of the next choice value.
// The argument is a reference to the field tobe examined.
virtual bool next (NCursesFormField& f) = 0;
// Redefine this function to do the retrieval of the previous choice value.
// The argument is a reference to the field tobe examined.
virtual bool previous(NCursesFormField& f) = 0;
public:
UserDefinedFieldType_With_Choice() {
fieldtype = generic_fieldtype_with_choice;
}
};
#endif // NCURSES_CURSESF_H_incl