Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 1 | /**************************************************************************** |
| 2 | * Copyright (c) 1998-2005,2010 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 * |
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| 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 * |
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| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
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| 23 | * Except as contained in this notice, the name(s) of the above copyright * |
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| 27 | ****************************************************************************/ |
| 28 | |
| 29 | /**************************************************************************** |
| 30 | * Author: Juergen Pfeifer, 1995,1997 * |
| 31 | ****************************************************************************/ |
| 32 | |
| 33 | #include "form.priv.h" |
| 34 | |
| 35 | MODULE_ID("$Id: frm_data.c,v 1.15 2010/01/23 21:14:36 tom Exp $") |
| 36 | |
| 37 | /*--------------------------------------------------------------------------- |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 38 | | Facility : libnform |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 39 | | Function : bool data_behind(const FORM *form) |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 40 | | |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 41 | | Description : Check for off-screen data behind. This is nearly trivial |
| 42 | | because the beginning of a field is fixed. |
| 43 | | |
| 44 | | Return Values : TRUE - there are off-screen data behind |
| 45 | | FALSE - there are no off-screen data behind |
| 46 | +--------------------------------------------------------------------------*/ |
| 47 | NCURSES_EXPORT(bool) |
| 48 | data_behind(const FORM *form) |
| 49 | { |
| 50 | bool result = FALSE; |
| 51 | |
| 52 | T((T_CALLED("data_behind(%p)"), (const void *)form)); |
| 53 | |
| 54 | if (form && (form->status & _POSTED) && form->current) |
| 55 | { |
| 56 | FIELD *field; |
| 57 | |
| 58 | field = form->current; |
| 59 | if (!Single_Line_Field(field)) |
| 60 | { |
| 61 | result = (form->toprow == 0) ? FALSE : TRUE; |
| 62 | } |
| 63 | else |
| 64 | { |
| 65 | result = (form->begincol == 0) ? FALSE : TRUE; |
| 66 | } |
| 67 | } |
| 68 | returnBool(result); |
| 69 | } |
| 70 | |
| 71 | /*--------------------------------------------------------------------------- |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 72 | | Facility : libnform |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 73 | | Function : static char * Only_Padding( |
| 74 | | WINDOW *w, |
| 75 | | int len, |
| 76 | | int pad) |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 77 | | |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 78 | | Description : Test if 'length' cells starting at the current position |
| 79 | | contain a padding character. |
| 80 | | |
| 81 | | Return Values : true if only padding cells are found |
| 82 | +--------------------------------------------------------------------------*/ |
| 83 | NCURSES_INLINE static bool |
| 84 | Only_Padding(WINDOW *w, int len, int pad) |
| 85 | { |
| 86 | bool result = TRUE; |
| 87 | int y, x, j; |
| 88 | FIELD_CELL cell; |
| 89 | |
| 90 | getyx(w, y, x); |
| 91 | for (j = 0; j < len; ++j) |
| 92 | { |
| 93 | if (wmove(w, y, x + j) != ERR) |
| 94 | { |
| 95 | #if USE_WIDEC_SUPPORT |
| 96 | if (win_wch(w, &cell) != ERR) |
| 97 | { |
| 98 | if ((chtype)CharOf(cell) != ChCharOf(pad) |
| 99 | || cell.chars[1] != 0) |
| 100 | { |
| 101 | result = FALSE; |
| 102 | break; |
| 103 | } |
| 104 | } |
| 105 | #else |
| 106 | cell = winch(w); |
| 107 | if (ChCharOf(cell) != ChCharOf(pad)) |
| 108 | { |
| 109 | result = FALSE; |
| 110 | break; |
| 111 | } |
| 112 | #endif |
| 113 | } |
| 114 | else |
| 115 | { |
| 116 | /* if an error, return true: no non-padding text found */ |
| 117 | break; |
| 118 | } |
| 119 | } |
| 120 | /* no need to reset the cursor position; caller does this */ |
| 121 | return result; |
| 122 | } |
| 123 | |
| 124 | /*--------------------------------------------------------------------------- |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 125 | | Facility : libnform |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 126 | | Function : bool data_ahead(const FORM *form) |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 127 | | |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 128 | | Description : Check for off-screen data ahead. This is more difficult |
Stefan Reinauer | e11835e | 2011-10-31 12:54:00 -0700 | [diff] [blame] | 129 | | because a dynamic field has a variable end. |
Patrick Georgi | 3b77b72 | 2011-07-07 15:41:53 +0200 | [diff] [blame] | 130 | | |
| 131 | | Return Values : TRUE - there are off-screen data ahead |
| 132 | | FALSE - there are no off-screen data ahead |
| 133 | +--------------------------------------------------------------------------*/ |
| 134 | NCURSES_EXPORT(bool) |
| 135 | data_ahead(const FORM *form) |
| 136 | { |
| 137 | bool result = FALSE; |
| 138 | |
| 139 | T((T_CALLED("data_ahead(%p)"), (const void *)form)); |
| 140 | |
| 141 | if (form && (form->status & _POSTED) && form->current) |
| 142 | { |
| 143 | FIELD *field; |
| 144 | bool cursor_moved = FALSE; |
| 145 | int pos; |
| 146 | |
| 147 | field = form->current; |
| 148 | assert(form->w); |
| 149 | |
| 150 | if (Single_Line_Field(field)) |
| 151 | { |
| 152 | int check_len; |
| 153 | |
| 154 | pos = form->begincol + field->cols; |
| 155 | while (pos < field->dcols) |
| 156 | { |
| 157 | check_len = field->dcols - pos; |
| 158 | if (check_len >= field->cols) |
| 159 | check_len = field->cols; |
| 160 | cursor_moved = TRUE; |
| 161 | wmove(form->w, 0, pos); |
| 162 | if (Only_Padding(form->w, check_len, field->pad)) |
| 163 | pos += field->cols; |
| 164 | else |
| 165 | { |
| 166 | result = TRUE; |
| 167 | break; |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | else |
| 172 | { |
| 173 | pos = form->toprow + field->rows; |
| 174 | while (pos < field->drows) |
| 175 | { |
| 176 | cursor_moved = TRUE; |
| 177 | wmove(form->w, pos, 0); |
| 178 | pos++; |
| 179 | if (!Only_Padding(form->w, field->cols, field->pad)) |
| 180 | { |
| 181 | result = TRUE; |
| 182 | break; |
| 183 | } |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | if (cursor_moved) |
| 188 | wmove(form->w, form->currow, form->curcol); |
| 189 | } |
| 190 | returnBool(result); |
| 191 | } |
| 192 | |
| 193 | /* frm_data.c ends here */ |