1 | /*
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2 | * checklist.c -- implements the checklist box
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3 | *
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4 | * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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5 | * Stuart Herbert - S.Herbert@sheffield.ac.uk: radiolist extension
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6 | * Alessandro Rubini - rubini@ipvvis.unipv.it: merged the two
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7 | * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
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8 | *
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9 | * This program is free software; you can redistribute it and/or
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10 | * modify it under the terms of the GNU General Public License
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11 | * as published by the Free Software Foundation; either version 2
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12 | * of the License, or (at your option) any later version.
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13 | *
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14 | * This program is distributed in the hope that it will be useful,
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 | * GNU General Public License for more details.
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18 | *
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19 | * You should have received a copy of the GNU General Public License
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20 | * along with this program; if not, write to the Free Software
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21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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22 | */
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23 |
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24 | #include "dialog.h"
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25 |
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26 | static int list_width, check_x, item_x;
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27 |
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28 | /*
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29 | * Print list item
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30 | */
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31 | static void print_item(WINDOW * win, const char *item, int status, int choice,
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32 | int selected)
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33 | {
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34 | int i;
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35 |
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36 | /* Clear 'residue' of last item */
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37 | wattrset(win, menubox_attr);
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38 | wmove(win, choice, 0);
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39 | for (i = 0; i < list_width; i++)
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40 | waddch(win, ' ');
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41 |
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42 | wmove(win, choice, check_x);
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43 | wattrset(win, selected ? check_selected_attr : check_attr);
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44 | wprintw(win, "(%c)", status ? 'X' : ' ');
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45 |
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46 | wattrset(win, selected ? tag_selected_attr : tag_attr);
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47 | mvwaddch(win, choice, item_x, item[0]);
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48 | wattrset(win, selected ? item_selected_attr : item_attr);
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49 | waddstr(win, (char *)item + 1);
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50 | if (selected) {
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51 | wmove(win, choice, check_x + 1);
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52 | wrefresh(win);
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53 | }
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54 | }
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55 |
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56 | /*
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57 | * Print the scroll indicators.
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58 | */
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59 | static void print_arrows(WINDOW * win, int choice, int item_no, int scroll,
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60 | int y, int x, int height)
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61 | {
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62 | wmove(win, y, x);
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63 |
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64 | if (scroll > 0) {
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65 | wattrset(win, uarrow_attr);
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66 | waddch(win, ACS_UARROW);
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67 | waddstr(win, "(-)");
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68 | } else {
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69 | wattrset(win, menubox_attr);
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70 | waddch(win, ACS_HLINE);
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71 | waddch(win, ACS_HLINE);
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72 | waddch(win, ACS_HLINE);
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73 | waddch(win, ACS_HLINE);
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74 | }
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75 |
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76 | y = y + height + 1;
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77 | wmove(win, y, x);
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78 |
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79 | if ((height < item_no) && (scroll + choice < item_no - 1)) {
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80 | wattrset(win, darrow_attr);
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81 | waddch(win, ACS_DARROW);
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82 | waddstr(win, "(+)");
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83 | } else {
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84 | wattrset(win, menubox_border_attr);
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85 | waddch(win, ACS_HLINE);
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86 | waddch(win, ACS_HLINE);
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87 | waddch(win, ACS_HLINE);
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88 | waddch(win, ACS_HLINE);
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89 | }
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90 | }
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91 |
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92 | /*
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93 | * Display the termination buttons
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94 | */
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95 | static void print_buttons(WINDOW * dialog, int height, int width, int selected)
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96 | {
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97 | int x = width / 2 - 11;
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98 | int y = height - 2;
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99 |
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100 | print_button(dialog, "Select", y, x, selected == 0);
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101 | print_button(dialog, " Help ", y, x + 14, selected == 1);
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102 |
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103 | wmove(dialog, y, x + 1 + 14 * selected);
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104 | wrefresh(dialog);
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105 | }
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106 |
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107 | /*
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108 | * Display a dialog box with a list of options that can be turned on or off
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109 | * in the style of radiolist (only one option turned on at a time).
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110 | */
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111 | int dialog_checklist(const char *title, const char *prompt, int height,
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112 | int width, int list_height, int item_no,
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113 | const char *const *items)
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114 | {
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115 | int i, x, y, box_x, box_y;
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116 | int key = 0, button = 0, choice = 0, scroll = 0, max_choice, *status;
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117 | WINDOW *dialog, *list;
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118 |
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119 | /* Allocate space for storing item on/off status */
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120 | if ((status = malloc(sizeof(int) * item_no)) == NULL) {
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121 | endwin();
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122 | fprintf(stderr,
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123 | "\nCan't allocate memory in dialog_checklist().\n");
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124 | exit(-1);
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125 | }
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126 |
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127 | /* Initializes status */
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128 | for (i = 0; i < item_no; i++) {
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129 | status[i] = !strcasecmp(items[i * 3 + 2], "on");
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130 | if ((!choice && status[i])
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131 | || !strcasecmp(items[i * 3 + 2], "selected"))
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132 | choice = i + 1;
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133 | }
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134 | if (choice)
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135 | choice--;
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136 |
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137 | max_choice = MIN(list_height, item_no);
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138 |
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139 | /* center dialog box on screen */
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140 | x = (COLS - width) / 2;
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141 | y = (LINES - height) / 2;
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142 |
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143 | draw_shadow(stdscr, y, x, height, width);
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144 |
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145 | dialog = newwin(height, width, y, x);
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146 | keypad(dialog, TRUE);
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147 |
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148 | draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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149 | wattrset(dialog, border_attr);
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150 | mvwaddch(dialog, height - 3, 0, ACS_LTEE);
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151 | for (i = 0; i < width - 2; i++)
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152 | waddch(dialog, ACS_HLINE);
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153 | wattrset(dialog, dialog_attr);
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154 | waddch(dialog, ACS_RTEE);
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155 |
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156 | print_title(dialog, title, width);
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157 |
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158 | wattrset(dialog, dialog_attr);
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159 | print_autowrap(dialog, prompt, width - 2, 1, 3);
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160 |
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161 | list_width = width - 6;
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162 | box_y = height - list_height - 5;
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163 | box_x = (width - list_width) / 2 - 1;
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164 |
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165 | /* create new window for the list */
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166 | list = subwin(dialog, list_height, list_width, y + box_y + 1,
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167 | x + box_x + 1);
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168 |
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169 | keypad(list, TRUE);
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170 |
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171 | /* draw a box around the list items */
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172 | draw_box(dialog, box_y, box_x, list_height + 2, list_width + 2,
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173 | menubox_border_attr, menubox_attr);
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174 |
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175 | /* Find length of longest item in order to center checklist */
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176 | check_x = 0;
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177 | for (i = 0; i < item_no; i++)
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178 | check_x = MAX(check_x, +strlen(items[i * 3 + 1]) + 4);
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179 |
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180 | check_x = (list_width - check_x) / 2;
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181 | item_x = check_x + 4;
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182 |
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183 | if (choice >= list_height) {
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184 | scroll = choice - list_height + 1;
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185 | choice -= scroll;
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186 | }
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187 |
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188 | /* Print the list */
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189 | for (i = 0; i < max_choice; i++) {
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190 | print_item(list, items[(scroll + i) * 3 + 1],
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191 | status[i + scroll], i, i == choice);
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192 | }
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193 |
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194 | print_arrows(dialog, choice, item_no, scroll,
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195 | box_y, box_x + check_x + 5, list_height);
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196 |
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197 | print_buttons(dialog, height, width, 0);
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198 |
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199 | wnoutrefresh(dialog);
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200 | wnoutrefresh(list);
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201 | doupdate();
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202 |
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203 | while (key != ESC) {
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204 | key = wgetch(dialog);
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205 |
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206 | for (i = 0; i < max_choice; i++)
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207 | if (toupper(key) ==
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208 | toupper(items[(scroll + i) * 3 + 1][0]))
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209 | break;
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210 |
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211 | if (i < max_choice || key == KEY_UP || key == KEY_DOWN ||
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212 | key == '+' || key == '-') {
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213 | if (key == KEY_UP || key == '-') {
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214 | if (!choice) {
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215 | if (!scroll)
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216 | continue;
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217 | /* Scroll list down */
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218 | if (list_height > 1) {
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219 | /* De-highlight current first item */
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220 | print_item(list, items[scroll * 3 + 1],
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221 | status[scroll], 0, FALSE);
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222 | scrollok(list, TRUE);
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223 | wscrl(list, -1);
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224 | scrollok(list, FALSE);
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225 | }
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226 | scroll--;
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227 | print_item(list, items[scroll * 3 + 1], status[scroll], 0, TRUE);
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228 | print_arrows(dialog, choice, item_no,
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229 | scroll, box_y, box_x + check_x + 5, list_height);
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230 |
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231 | wnoutrefresh(dialog);
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232 | wrefresh(list);
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233 |
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234 | continue; /* wait for another key press */
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235 | } else
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236 | i = choice - 1;
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237 | } else if (key == KEY_DOWN || key == '+') {
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238 | if (choice == max_choice - 1) {
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239 | if (scroll + choice >= item_no - 1)
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240 | continue;
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241 | /* Scroll list up */
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242 | if (list_height > 1) {
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243 | /* De-highlight current last item before scrolling up */
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244 | print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
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245 | status[scroll + max_choice - 1],
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246 | max_choice - 1, FALSE);
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247 | scrollok(list, TRUE);
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248 | wscrl(list, 1);
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249 | scrollok(list, FALSE);
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250 | }
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251 | scroll++;
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252 | print_item(list, items[(scroll + max_choice - 1) * 3 + 1],
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253 | status[scroll + max_choice - 1], max_choice - 1, TRUE);
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254 |
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255 | print_arrows(dialog, choice, item_no,
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256 | scroll, box_y, box_x + check_x + 5, list_height);
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257 |
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258 | wnoutrefresh(dialog);
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259 | wrefresh(list);
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260 |
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261 | continue; /* wait for another key press */
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262 | } else
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263 | i = choice + 1;
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264 | }
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265 | if (i != choice) {
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266 | /* De-highlight current item */
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267 | print_item(list, items[(scroll + choice) * 3 + 1],
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268 | status[scroll + choice], choice, FALSE);
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269 | /* Highlight new item */
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270 | choice = i;
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271 | print_item(list, items[(scroll + choice) * 3 + 1],
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272 | status[scroll + choice], choice, TRUE);
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273 | wnoutrefresh(dialog);
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274 | wrefresh(list);
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275 | }
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276 | continue; /* wait for another key press */
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277 | }
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278 | switch (key) {
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279 | case 'H':
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280 | case 'h':
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281 | case '?':
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282 | fprintf(stderr, "%s", items[(scroll + choice) * 3]);
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283 | delwin(dialog);
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284 | free(status);
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285 | return 1;
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286 | case TAB:
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287 | case KEY_LEFT:
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288 | case KEY_RIGHT:
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289 | button = ((key == KEY_LEFT ? --button : ++button) < 0)
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290 | ? 1 : (button > 1 ? 0 : button);
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291 |
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292 | print_buttons(dialog, height, width, button);
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293 | wrefresh(dialog);
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294 | break;
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295 | case 'S':
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296 | case 's':
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297 | case ' ':
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298 | case '\n':
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299 | if (!button) {
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300 | if (!status[scroll + choice]) {
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301 | for (i = 0; i < item_no; i++)
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302 | status[i] = 0;
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303 | status[scroll + choice] = 1;
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304 | for (i = 0; i < max_choice; i++)
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305 | print_item(list, items[(scroll + i) * 3 + 1],
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306 | status[scroll + i], i, i == choice);
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307 | }
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308 | wnoutrefresh(dialog);
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309 | wrefresh(list);
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310 |
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311 | for (i = 0; i < item_no; i++)
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312 | if (status[i])
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313 | fprintf(stderr, "%s", items[i * 3]);
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314 | } else
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315 | fprintf(stderr, "%s", items[(scroll + choice) * 3]);
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316 | delwin(dialog);
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317 | free(status);
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318 | return button;
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319 | case 'X':
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320 | case 'x':
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321 | key = ESC;
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322 | case ESC:
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323 | break;
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324 | }
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325 |
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326 | /* Now, update everything... */
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327 | doupdate();
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328 | }
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329 |
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330 | delwin(dialog);
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331 | free(status);
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332 | return -1; /* ESC pressed */
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333 | }
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