1 /****************************************************************************
2 * Copyright (c) 1998 Free Software Foundation, Inc. *
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: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
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. *
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 *
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27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Juergen Pfeifer <Juergen.Pfeifer@T-Online.de> 1995,1997 *
31 ****************************************************************************/
33 #include "form.priv.h"
35 MODULE_ID("$Id: frm_data.c,v 1.4 1998/02/11 12:13:42 tom Exp $")
37 /*---------------------------------------------------------------------------
39 | Function : bool data_behind(const FORM *form)
41 | Description : Check for off-screen data behind. This is nearly trivial
42 | becose the begin of a field is fixed.
44 | Return Values : TRUE - there are off-screen data behind
45 | FALSE - there are no off-screen data behind
46 +--------------------------------------------------------------------------*/
47 bool data_behind(const FORM *form)
51 if (form && (form->status & _POSTED) && form->current)
55 field = form->current;
56 if (!Single_Line_Field(field))
58 result = (form->toprow==0) ? FALSE : TRUE;
62 result = (form->begincol==0) ? FALSE : TRUE;
68 /*---------------------------------------------------------------------------
70 | Function : static char * After_Last_Non_Pad_Position(
75 | Description : Find the last position in the buffer that doesn't
76 | contain a padding character.
78 | Return Values : The pointer to this position
79 +--------------------------------------------------------------------------*/
81 static char * After_Last_Non_Pad_Position(char *buffer, int len, int pad)
83 char *end = buffer + len;
85 assert(buffer && len>=0);
86 while ( (buffer < end) && (*(end-1)==pad) )
92 #define SMALL_BUFFER_SIZE (80)
94 /*---------------------------------------------------------------------------
96 | Function : bool data_ahead(const FORM *form)
98 | Description : Check for off-screen data ahead. This is more difficult
99 | because a dynamic field has a variable end.
101 | Return Values : TRUE - there are off-screen data ahead
102 | FALSE - there are no off-screen data ahead
103 +--------------------------------------------------------------------------*/
104 bool data_ahead(const FORM *form)
108 if (form && (form->status & _POSTED) && form->current)
110 static char buffer[SMALL_BUFFER_SIZE + 1];
113 bool cursor_moved = FALSE;
118 field = form->current;
121 large_buffer = (field->cols > SMALL_BUFFER_SIZE);
123 bp = (char *)malloc((size_t)(field->cols) + 1);
129 if (Single_Line_Field(field))
133 pos = form->begincol + field->cols;
134 while (pos < field->dcols)
136 check_len = field->dcols - pos;
137 if ( check_len >= field->cols )
138 check_len = field->cols;
140 wmove(form->w,0,pos);
141 winnstr(form->w,bp,check_len);
143 After_Last_Non_Pad_Position(bp,check_len,field->pad);
144 if (found_content==bp)
155 pos = form->toprow + field->rows;
156 while (pos < field->drows)
159 wmove(form->w,pos,0);
161 winnstr(form->w,bp,field->cols);
163 After_Last_Non_Pad_Position(bp,field->cols,field->pad);
164 if (found_content!=bp)
176 wmove(form->w,form->currow,form->curcol);
181 /* frm_data.c ends here */