1/****************************************************************************
2 * Copyright (c) 1998-2004,2005 Free Software Foundation, Inc.              *
3 *                                                                          *
4 * Permission is hereby granted, free of charge, to any person obtaining a  *
5 * copy of this software and associated documentation files (the            *
6 * "Software"), to deal in the Software without restriction, including      *
7 * without limitation the rights to use, copy, modify, merge, publish,      *
8 * distribute, distribute with modifications, sublicense, and/or sell       *
9 * copies of the Software, and to permit persons to whom the Software is    *
10 * furnished to do so, subject to the following conditions:                 *
11 *                                                                          *
12 * The above copyright notice and this permission notice shall be included  *
13 * in all copies or substantial portions of the Software.                   *
14 *                                                                          *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
22 *                                                                          *
23 * Except as contained in this notice, the name(s) of the above copyright   *
24 * holders shall not be used in advertising or otherwise to promote the     *
25 * sale, use or other dealings in this Software without prior written       *
26 * authorization.                                                           *
27 ****************************************************************************/
28
29/****************************************************************************
30 *   Author:  Juergen Pfeifer, 1995,1997                                    *
31 ****************************************************************************/
32
33/* $Id: form.priv.h,v 0.25 2005/03/05 23:47:26 tom Exp $ */
34
35#ifndef FORM_PRIV_H
36#define FORM_PRIV_H 1
37
38#include "curses.priv.h"
39#include "mf_common.h"
40
41#if USE_WIDEC_SUPPORT
42#include <wchar.h>
43#include <wctype.h>
44
45#ifndef MB_LEN_MAX
46#define MB_LEN_MAX 8 /* should be >= MB_CUR_MAX, but that may be a function */
47#endif
48
49#define FIELD_CELL NCURSES_CH_T
50
51#define NCURSES_FIELD_INTERNALS char** expanded; WINDOW *working;
52#define NCURSES_FIELD_EXTENSION , (char **)0, (WINDOW *)0
53
54#else
55
56#define FIELD_CELL char
57
58#define NCURSES_FIELD_EXTENSION /* nothing */
59
60#endif
61
62#include "form.h"
63
64/* form  status values */
65#define _OVLMODE         (0x04U) /* Form is in overlay mode                */
66#define _WINDOW_MODIFIED (0x10U) /* Current field window has been modified */
67#define _FCHECK_REQUIRED (0x20U) /* Current field needs validation         */
68
69/* field status values */
70#define _CHANGED         (0x01U) /* Field has been changed                 */
71#define _NEWTOP          (0x02U) /* Vertical scrolling occurred            */
72#define _NEWPAGE         (0x04U) /* field begins new page of form          */
73#define _MAY_GROW        (0x08U) /* dynamic field may still grow           */
74
75/* fieldtype status values */
76#define _LINKED_TYPE     (0x01U) /* Type is a linked type                  */
77#define _HAS_ARGS        (0x02U) /* Type has arguments                     */
78#define _HAS_CHOICE      (0x04U) /* Type has choice methods                */
79#define _RESIDENT        (0x08U) /* Type is built-in                       */
80
81/* This are the field options required to be a selectable field in field
82   navigation requests */
83#define O_SELECTABLE (O_ACTIVE | O_VISIBLE)
84
85/* If form is NULL replace form argument by default-form */
86#define Normalize_Form(form) \
87  ((form) = (form != 0) ? (form) : _nc_Default_Form)
88
89/* If field is NULL replace field argument by default-field */
90#define Normalize_Field(field) \
91  ((field) = (field != 0) ? (field) : _nc_Default_Field)
92
93/* Retrieve forms window */
94#define Get_Form_Window(form) \
95  ((form)->sub?(form)->sub:((form)->win?(form)->win:stdscr))
96
97/* Calculate the size for a single buffer for this field */
98#define Buffer_Length(field) ((field)->drows * (field)->dcols)
99
100/* Calculate the total size of all buffers for this field */
101#define Total_Buffer_Size(field) \
102   ( (Buffer_Length(field) + 1) * (1+(field)->nbuf) * sizeof(FIELD_CELL) )
103
104/* Logic to determine whether or not a field is single lined */
105#define Single_Line_Field(field) \
106   (((field)->rows + (field)->nrow) == 1)
107
108/* Logic to determine whether or not a field is selectable */
109#define Field_Is_Selectable(f)     (((unsigned)((f)->opts) & O_SELECTABLE)==O_SELECTABLE)
110#define Field_Is_Not_Selectable(f) (((unsigned)((f)->opts) & O_SELECTABLE)!=O_SELECTABLE)
111
112typedef struct typearg
113  {
114    struct typearg *left;
115    struct typearg *right;
116  }
117TypeArgument;
118
119/* This is a dummy request code (normally invalid) to be used internally
120   with the form_driver() routine to position to the first active field
121   on the form
122*/
123#define FIRST_ACTIVE_MAGIC (-291056)
124
125#define ALL_FORM_OPTS  (                \
126			O_NL_OVERLOAD  |\
127			O_BS_OVERLOAD   )
128
129#define ALL_FIELD_OPTS (Field_Options)( \
130			O_VISIBLE |\
131			O_ACTIVE  |\
132			O_PUBLIC  |\
133			O_EDIT    |\
134			O_WRAP    |\
135			O_BLANK   |\
136			O_AUTOSKIP|\
137			O_NULLOK  |\
138			O_PASSOK  |\
139			O_STATIC   )
140
141#define C_BLANK ' '
142#define is_blank(c) ((c)==C_BLANK)
143
144#define C_ZEROS '\0'
145
146extern NCURSES_EXPORT_VAR(const FIELDTYPE *) _nc_Default_FieldType;
147
148extern NCURSES_EXPORT(TypeArgument *) _nc_Make_Argument (const FIELDTYPE*, va_list*, int*);
149extern NCURSES_EXPORT(TypeArgument *) _nc_Copy_Argument (const FIELDTYPE*, const TypeArgument*, int*);
150extern NCURSES_EXPORT(void) _nc_Free_Argument (const FIELDTYPE*, TypeArgument*);
151extern NCURSES_EXPORT(bool) _nc_Copy_Type (FIELD*, FIELD const *);
152extern NCURSES_EXPORT(void) _nc_Free_Type (FIELD *);
153
154extern NCURSES_EXPORT(int) _nc_Synchronize_Attributes (FIELD*);
155extern NCURSES_EXPORT(int) _nc_Synchronize_Options (FIELD*, Field_Options);
156extern NCURSES_EXPORT(int) _nc_Set_Form_Page (FORM*, int, FIELD*);
157extern NCURSES_EXPORT(int) _nc_Refresh_Current_Field (FORM*);
158extern NCURSES_EXPORT(FIELD *) _nc_First_Active_Field (FORM*);
159extern NCURSES_EXPORT(bool) _nc_Internal_Validation (FORM*);
160extern NCURSES_EXPORT(int) _nc_Set_Current_Field (FORM*, FIELD*);
161extern NCURSES_EXPORT(int) _nc_Position_Form_Cursor (FORM*);
162
163#if USE_WIDEC_SUPPORT
164extern NCURSES_EXPORT(wchar_t *) _nc_Widen_String(char *, int *);
165#endif
166
167#ifdef TRACE
168
169#define returnField(code)	TRACE_RETURN(code,field)
170#define returnFieldPtr(code)	TRACE_RETURN(code,field_ptr)
171#define returnForm(code)	TRACE_RETURN(code,form)
172#define returnFieldType(code)	TRACE_RETURN(code,field_type)
173#define returnFormHook(code)	TRACE_RETURN(code,form_hook)
174
175extern NCURSES_EXPORT(FIELD **)	    _nc_retrace_field_ptr (FIELD **);
176extern NCURSES_EXPORT(FIELD *)	    _nc_retrace_field (FIELD *);
177extern NCURSES_EXPORT(FIELDTYPE *)  _nc_retrace_field_type (FIELDTYPE *);
178extern NCURSES_EXPORT(FORM *)  _nc_retrace_form (FORM *);
179extern NCURSES_EXPORT(Form_Hook)  _nc_retrace_form_hook (Form_Hook);
180
181#else /* !TRACE */
182
183#define returnFieldPtr(code)	return code
184#define returnFieldType(code)	return code
185#define returnField(code)	return code
186#define returnForm(code)	return code
187#define returnFormHook(code)	return code
188
189#endif /* TRACE/!TRACE */
190
191/*
192 * Use Check_CTYPE_Field() to simplify FIELDTYPE's that use only the ccheck()
193 * function.
194 */
195#if USE_WIDEC_SUPPORT
196#define Check_CTYPE_Field(result, buffer, width, ccheck) \
197  while (*buffer && *buffer == ' ') \
198    buffer++; \
199  if (*buffer) \
200    { \
201      bool blank = FALSE; \
202      int len; \
203      int n; \
204      wchar_t *list = _nc_Widen_String((char *)buffer, &len); \
205      if (list != 0) \
206	{ \
207	  result = TRUE; \
208	  for (n = 0; n < len; ++n) \
209	    { \
210	      if (blank) \
211		{ \
212		  if (list[n] != ' ') \
213		    { \
214		      result = FALSE; \
215		      break; \
216		    } \
217		} \
218	      else if (list[n] == ' ') \
219		{ \
220		  blank = TRUE; \
221		  result = (n + 1 >= width); \
222		} \
223	      else if (!ccheck(list[n], NULL)) \
224		{ \
225		  result = FALSE; \
226		  break; \
227		} \
228	    } \
229	  free(list); \
230	} \
231    }
232#else
233#define Check_CTYPE_Field(result, buffer, width, ccheck) \
234  while (*buffer && *buffer == ' ') \
235    buffer++; \
236  if (*buffer) \
237    { \
238      unsigned char *s = buffer; \
239      int l = -1; \
240      while (*buffer && ccheck(*buffer, NULL)) \
241	buffer++; \
242      l = (int)(buffer - s); \
243      while (*buffer && *buffer == ' ') \
244	buffer++; \
245      result = ((*buffer || (l < width)) ? FALSE : TRUE); \
246    }
247#endif
248
249#endif /* FORM_PRIV_H */
250