1 | /*
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2 | * inputbox.c -- implements the input box
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3 | *
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4 | * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
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5 | * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
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6 | *
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7 | * This program is free software; you can redistribute it and/or
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8 | * modify it under the terms of the GNU General Public License
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9 | * as published by the Free Software Foundation; either version 2
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10 | * of the License, or (at your option) any later version.
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11 | *
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12 | * This program is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 | * GNU General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU General Public License
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18 | * along with this program; if not, write to the Free Software
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19 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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20 | */
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21 |
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22 | #include "dialog.h"
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23 |
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24 | char dialog_input_result[MAX_LEN + 1];
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25 |
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26 | /*
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27 | * Print the termination buttons
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28 | */
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29 | static void print_buttons(WINDOW * dialog, int height, int width, int selected)
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30 | {
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31 | int x = width / 2 - 11;
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32 | int y = height - 2;
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33 |
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34 | print_button(dialog, " Ok ", y, x, selected == 0);
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35 | print_button(dialog, " Help ", y, x + 14, selected == 1);
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36 |
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37 | wmove(dialog, y, x + 1 + 14 * selected);
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38 | wrefresh(dialog);
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39 | }
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40 |
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41 | /*
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42 | * Display a dialog box for inputing a string
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43 | */
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44 | int dialog_inputbox(const char *title, const char *prompt, int height, int width,
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45 | const char *init)
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46 | {
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47 | int i, x, y, box_y, box_x, box_width;
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48 | int input_x = 0, scroll = 0, key = 0, button = -1;
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49 | char *instr = dialog_input_result;
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50 | WINDOW *dialog;
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51 |
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52 | /* center dialog box on screen */
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53 | x = (COLS - width) / 2;
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54 | y = (LINES - height) / 2;
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55 |
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56 | draw_shadow(stdscr, y, x, height, width);
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57 |
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58 | dialog = newwin(height, width, y, x);
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59 | keypad(dialog, TRUE);
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60 |
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61 | draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
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62 | wattrset(dialog, border_attr);
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63 | mvwaddch(dialog, height - 3, 0, ACS_LTEE);
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64 | for (i = 0; i < width - 2; i++)
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65 | waddch(dialog, ACS_HLINE);
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66 | wattrset(dialog, dialog_attr);
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67 | waddch(dialog, ACS_RTEE);
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68 |
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69 | print_title(dialog, title, width);
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70 |
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71 | wattrset(dialog, dialog_attr);
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72 | print_autowrap(dialog, prompt, width - 2, 1, 3);
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73 |
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74 | /* Draw the input field box */
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75 | box_width = width - 6;
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76 | getyx(dialog, y, x);
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77 | box_y = y + 2;
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78 | box_x = (width - box_width) / 2;
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79 | draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2, border_attr, dialog_attr);
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80 |
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81 | print_buttons(dialog, height, width, 0);
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82 |
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83 | /* Set up the initial value */
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84 | wmove(dialog, box_y, box_x);
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85 | wattrset(dialog, inputbox_attr);
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86 |
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87 | if (!init)
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88 | instr[0] = '\0';
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89 | else
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90 | strcpy(instr, init);
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91 |
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92 | input_x = strlen(instr);
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93 |
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94 | if (input_x >= box_width) {
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95 | scroll = input_x - box_width + 1;
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96 | input_x = box_width - 1;
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97 | for (i = 0; i < box_width - 1; i++)
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98 | waddch(dialog, instr[scroll + i]);
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99 | } else {
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100 | waddstr(dialog, instr);
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101 | }
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102 |
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103 | wmove(dialog, box_y, box_x + input_x);
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104 |
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105 | wrefresh(dialog);
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106 |
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107 | while (key != ESC) {
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108 | key = wgetch(dialog);
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109 |
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110 | if (button == -1) { /* Input box selected */
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111 | switch (key) {
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112 | case TAB:
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113 | case KEY_UP:
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114 | case KEY_DOWN:
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115 | break;
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116 | case KEY_LEFT:
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117 | continue;
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118 | case KEY_RIGHT:
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119 | continue;
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120 | case KEY_BACKSPACE:
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121 | case 127:
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122 | if (input_x || scroll) {
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123 | wattrset(dialog, inputbox_attr);
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124 | if (!input_x) {
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125 | scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
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126 | wmove(dialog, box_y, box_x);
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127 | for (i = 0; i < box_width; i++)
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128 | waddch(dialog,
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129 | instr[scroll + input_x + i] ?
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130 | instr[scroll + input_x + i] : ' ');
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131 | input_x = strlen(instr) - scroll;
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132 | } else
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133 | input_x--;
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134 | instr[scroll + input_x] = '\0';
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135 | mvwaddch(dialog, box_y, input_x + box_x, ' ');
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136 | wmove(dialog, box_y, input_x + box_x);
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137 | wrefresh(dialog);
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138 | }
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139 | continue;
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140 | default:
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141 | if (key < 0x100 && isprint(key)) {
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142 | if (scroll + input_x < MAX_LEN) {
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143 | wattrset(dialog, inputbox_attr);
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144 | instr[scroll + input_x] = key;
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145 | instr[scroll + input_x + 1] = '\0';
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146 | if (input_x == box_width - 1) {
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147 | scroll++;
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148 | wmove(dialog, box_y, box_x);
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149 | for (i = 0; i < box_width - 1; i++)
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150 | waddch(dialog, instr [scroll + i]);
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151 | } else {
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152 | wmove(dialog, box_y, input_x++ + box_x);
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153 | waddch(dialog, key);
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154 | }
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155 | wrefresh(dialog);
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156 | } else
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157 | flash(); /* Alarm user about overflow */
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158 | continue;
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159 | }
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160 | }
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161 | }
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162 | switch (key) {
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163 | case 'O':
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164 | case 'o':
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165 | delwin(dialog);
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166 | return 0;
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167 | case 'H':
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168 | case 'h':
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169 | delwin(dialog);
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170 | return 1;
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171 | case KEY_UP:
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172 | case KEY_LEFT:
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173 | switch (button) {
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174 | case -1:
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175 | button = 1; /* Indicates "Cancel" button is selected */
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176 | print_buttons(dialog, height, width, 1);
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177 | break;
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178 | case 0:
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179 | button = -1; /* Indicates input box is selected */
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180 | print_buttons(dialog, height, width, 0);
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181 | wmove(dialog, box_y, box_x + input_x);
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182 | wrefresh(dialog);
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183 | break;
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184 | case 1:
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185 | button = 0; /* Indicates "OK" button is selected */
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186 | print_buttons(dialog, height, width, 0);
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187 | break;
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188 | }
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189 | break;
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190 | case TAB:
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191 | case KEY_DOWN:
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192 | case KEY_RIGHT:
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193 | switch (button) {
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194 | case -1:
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195 | button = 0; /* Indicates "OK" button is selected */
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196 | print_buttons(dialog, height, width, 0);
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197 | break;
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198 | case 0:
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199 | button = 1; /* Indicates "Cancel" button is selected */
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200 | print_buttons(dialog, height, width, 1);
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201 | break;
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202 | case 1:
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203 | button = -1; /* Indicates input box is selected */
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204 | print_buttons(dialog, height, width, 0);
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205 | wmove(dialog, box_y, box_x + input_x);
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206 | wrefresh(dialog);
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207 | break;
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208 | }
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209 | break;
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210 | case ' ':
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211 | case '\n':
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212 | delwin(dialog);
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213 | return (button == -1 ? 0 : button);
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214 | case 'X':
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215 | case 'x':
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216 | key = ESC;
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217 | case ESC:
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218 | break;
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219 | }
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220 | }
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221 |
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222 | delwin(dialog);
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223 | return -1; /* ESC pressed */
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224 | }
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