1 | /*
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2 | * util.c
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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 | /* use colors by default? */
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25 | bool use_colors = 1;
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26 |
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27 | const char *backtitle = NULL;
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28 |
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29 | /*
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30 | * Attribute values, default is for mono display
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31 | */
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32 | chtype attributes[] = {
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33 | A_NORMAL, /* screen_attr */
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34 | A_NORMAL, /* shadow_attr */
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35 | A_NORMAL, /* dialog_attr */
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36 | A_BOLD, /* title_attr */
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37 | A_NORMAL, /* border_attr */
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38 | A_REVERSE, /* button_active_attr */
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39 | A_DIM, /* button_inactive_attr */
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40 | A_REVERSE, /* button_key_active_attr */
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41 | A_BOLD, /* button_key_inactive_attr */
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42 | A_REVERSE, /* button_label_active_attr */
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43 | A_NORMAL, /* button_label_inactive_attr */
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44 | A_NORMAL, /* inputbox_attr */
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45 | A_NORMAL, /* inputbox_border_attr */
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46 | A_NORMAL, /* searchbox_attr */
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47 | A_BOLD, /* searchbox_title_attr */
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48 | A_NORMAL, /* searchbox_border_attr */
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49 | A_BOLD, /* position_indicator_attr */
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50 | A_NORMAL, /* menubox_attr */
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51 | A_NORMAL, /* menubox_border_attr */
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52 | A_NORMAL, /* item_attr */
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53 | A_REVERSE, /* item_selected_attr */
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54 | A_BOLD, /* tag_attr */
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55 | A_REVERSE, /* tag_selected_attr */
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56 | A_BOLD, /* tag_key_attr */
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57 | A_REVERSE, /* tag_key_selected_attr */
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58 | A_BOLD, /* check_attr */
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59 | A_REVERSE, /* check_selected_attr */
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60 | A_BOLD, /* uarrow_attr */
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61 | A_BOLD /* darrow_attr */
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62 | };
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63 |
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64 | #include "colors.h"
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65 |
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66 | /*
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67 | * Table of color values
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68 | */
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69 | int color_table[][3] = {
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70 | {SCREEN_FG, SCREEN_BG, SCREEN_HL},
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71 | {SHADOW_FG, SHADOW_BG, SHADOW_HL},
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72 | {DIALOG_FG, DIALOG_BG, DIALOG_HL},
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73 | {TITLE_FG, TITLE_BG, TITLE_HL},
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74 | {BORDER_FG, BORDER_BG, BORDER_HL},
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75 | {BUTTON_ACTIVE_FG, BUTTON_ACTIVE_BG, BUTTON_ACTIVE_HL},
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76 | {BUTTON_INACTIVE_FG, BUTTON_INACTIVE_BG, BUTTON_INACTIVE_HL},
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77 | {BUTTON_KEY_ACTIVE_FG, BUTTON_KEY_ACTIVE_BG, BUTTON_KEY_ACTIVE_HL},
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78 | {BUTTON_KEY_INACTIVE_FG, BUTTON_KEY_INACTIVE_BG,
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79 | BUTTON_KEY_INACTIVE_HL},
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80 | {BUTTON_LABEL_ACTIVE_FG, BUTTON_LABEL_ACTIVE_BG,
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81 | BUTTON_LABEL_ACTIVE_HL},
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82 | {BUTTON_LABEL_INACTIVE_FG, BUTTON_LABEL_INACTIVE_BG,
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83 | BUTTON_LABEL_INACTIVE_HL},
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84 | {INPUTBOX_FG, INPUTBOX_BG, INPUTBOX_HL},
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85 | {INPUTBOX_BORDER_FG, INPUTBOX_BORDER_BG, INPUTBOX_BORDER_HL},
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86 | {SEARCHBOX_FG, SEARCHBOX_BG, SEARCHBOX_HL},
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87 | {SEARCHBOX_TITLE_FG, SEARCHBOX_TITLE_BG, SEARCHBOX_TITLE_HL},
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88 | {SEARCHBOX_BORDER_FG, SEARCHBOX_BORDER_BG, SEARCHBOX_BORDER_HL},
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89 | {POSITION_INDICATOR_FG, POSITION_INDICATOR_BG, POSITION_INDICATOR_HL},
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90 | {MENUBOX_FG, MENUBOX_BG, MENUBOX_HL},
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91 | {MENUBOX_BORDER_FG, MENUBOX_BORDER_BG, MENUBOX_BORDER_HL},
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92 | {ITEM_FG, ITEM_BG, ITEM_HL},
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93 | {ITEM_SELECTED_FG, ITEM_SELECTED_BG, ITEM_SELECTED_HL},
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94 | {TAG_FG, TAG_BG, TAG_HL},
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95 | {TAG_SELECTED_FG, TAG_SELECTED_BG, TAG_SELECTED_HL},
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96 | {TAG_KEY_FG, TAG_KEY_BG, TAG_KEY_HL},
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97 | {TAG_KEY_SELECTED_FG, TAG_KEY_SELECTED_BG, TAG_KEY_SELECTED_HL},
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98 | {CHECK_FG, CHECK_BG, CHECK_HL},
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99 | {CHECK_SELECTED_FG, CHECK_SELECTED_BG, CHECK_SELECTED_HL},
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100 | {UARROW_FG, UARROW_BG, UARROW_HL},
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101 | {DARROW_FG, DARROW_BG, DARROW_HL},
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102 | }; /* color_table */
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103 |
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104 | /*
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105 | * Set window to attribute 'attr'
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106 | */
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107 | void attr_clear(WINDOW * win, int height, int width, chtype attr)
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108 | {
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109 | int i, j;
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110 |
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111 | wattrset(win, attr);
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112 | for (i = 0; i < height; i++) {
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113 | wmove(win, i, 0);
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114 | for (j = 0; j < width; j++)
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115 | waddch(win, ' ');
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116 | }
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117 | touchwin(win);
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118 | }
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119 |
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120 | void dialog_clear(void)
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121 | {
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122 | attr_clear(stdscr, LINES, COLS, screen_attr);
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123 | /* Display background title if it exists ... - SLH */
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124 | if (backtitle != NULL) {
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125 | int i;
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126 |
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127 | wattrset(stdscr, screen_attr);
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128 | mvwaddstr(stdscr, 0, 1, (char *)backtitle);
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129 | wmove(stdscr, 1, 1);
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130 | for (i = 1; i < COLS - 1; i++)
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131 | waddch(stdscr, ACS_HLINE);
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132 | }
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133 | wnoutrefresh(stdscr);
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134 | }
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135 |
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136 | /*
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137 | * Do some initialization for dialog
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138 | */
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139 | void init_dialog(void)
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140 | {
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141 | initscr(); /* Init curses */
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142 | keypad(stdscr, TRUE);
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143 | cbreak();
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144 | noecho();
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145 |
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146 | if (use_colors) /* Set up colors */
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147 | color_setup();
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148 |
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149 | dialog_clear();
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150 | }
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151 |
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152 | /*
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153 | * Setup for color display
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154 | */
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155 | void color_setup(void)
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156 | {
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157 | int i;
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158 |
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159 | if (has_colors()) { /* Terminal supports color? */
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160 | start_color();
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161 |
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162 | /* Initialize color pairs */
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163 | for (i = 0; i < ATTRIBUTE_COUNT; i++)
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164 | init_pair(i + 1, color_table[i][0], color_table[i][1]);
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165 |
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166 | /* Setup color attributes */
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167 | for (i = 0; i < ATTRIBUTE_COUNT; i++)
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168 | attributes[i] = C_ATTR(color_table[i][2], i + 1);
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169 | }
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170 | }
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171 |
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172 | /*
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173 | * End using dialog functions.
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174 | */
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175 | void end_dialog(void)
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176 | {
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177 | endwin();
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178 | }
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179 |
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180 | /* Print the title of the dialog. Center the title and truncate
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181 | * tile if wider than dialog (- 2 chars).
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182 | **/
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183 | void print_title(WINDOW *dialog, const char *title, int width)
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184 | {
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185 | if (title) {
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186 | int tlen = MIN(width - 2, strlen(title));
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187 | wattrset(dialog, title_attr);
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188 | mvwaddch(dialog, 0, (width - tlen) / 2 - 1, ' ');
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189 | mvwaddnstr(dialog, 0, (width - tlen)/2, title, tlen);
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190 | waddch(dialog, ' ');
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191 | }
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192 | }
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193 |
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194 | /*
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195 | * Print a string of text in a window, automatically wrap around to the
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196 | * next line if the string is too long to fit on one line. Newline
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197 | * characters '\n' are replaced by spaces. We start on a new line
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198 | * if there is no room for at least 4 nonblanks following a double-space.
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199 | */
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200 | void print_autowrap(WINDOW * win, const char *prompt, int width, int y, int x)
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201 | {
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202 | int newl, cur_x, cur_y;
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203 | int i, prompt_len, room, wlen;
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204 | char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
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205 |
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206 | strcpy(tempstr, prompt);
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207 |
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208 | prompt_len = strlen(tempstr);
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209 |
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210 | /*
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211 | * Remove newlines
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212 | */
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213 | for (i = 0; i < prompt_len; i++) {
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214 | if (tempstr[i] == '\n')
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215 | tempstr[i] = ' ';
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216 | }
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217 |
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218 | if (prompt_len <= width - x * 2) { /* If prompt is short */
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219 | wmove(win, y, (width - prompt_len) / 2);
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220 | waddstr(win, tempstr);
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221 | } else {
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222 | cur_x = x;
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223 | cur_y = y;
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224 | newl = 1;
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225 | word = tempstr;
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226 | while (word && *word) {
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227 | sp = strchr(word, ' ');
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228 | if (sp)
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229 | *sp++ = 0;
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230 |
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231 | /* Wrap to next line if either the word does not fit,
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232 | or it is the first word of a new sentence, and it is
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233 | short, and the next word does not fit. */
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234 | room = width - cur_x;
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235 | wlen = strlen(word);
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236 | if (wlen > room ||
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237 | (newl && wlen < 4 && sp
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238 | && wlen + 1 + strlen(sp) > room
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239 | && (!(sp2 = strchr(sp, ' '))
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240 | || wlen + 1 + (sp2 - sp) > room))) {
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241 | cur_y++;
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242 | cur_x = x;
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243 | }
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244 | wmove(win, cur_y, cur_x);
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245 | waddstr(win, word);
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246 | getyx(win, cur_y, cur_x);
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247 | cur_x++;
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248 | if (sp && *sp == ' ') {
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249 | cur_x++; /* double space */
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250 | while (*++sp == ' ') ;
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251 | newl = 1;
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252 | } else
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253 | newl = 0;
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254 | word = sp;
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255 | }
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256 | }
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257 | }
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258 |
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259 | /*
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260 | * Print a button
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261 | */
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262 | void print_button(WINDOW * win, const char *label, int y, int x, int selected)
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263 | {
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264 | int i, temp;
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265 |
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266 | wmove(win, y, x);
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267 | wattrset(win, selected ? button_active_attr : button_inactive_attr);
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268 | waddstr(win, "<");
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269 | temp = strspn(label, " ");
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270 | label += temp;
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271 | wattrset(win, selected ? button_label_active_attr
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272 | : button_label_inactive_attr);
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273 | for (i = 0; i < temp; i++)
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274 | waddch(win, ' ');
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275 | wattrset(win, selected ? button_key_active_attr
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276 | : button_key_inactive_attr);
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277 | waddch(win, label[0]);
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278 | wattrset(win, selected ? button_label_active_attr
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279 | : button_label_inactive_attr);
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280 | waddstr(win, (char *)label + 1);
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281 | wattrset(win, selected ? button_active_attr : button_inactive_attr);
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282 | waddstr(win, ">");
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283 | wmove(win, y, x + temp + 1);
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284 | }
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285 |
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286 | /*
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287 | * Draw a rectangular box with line drawing characters
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288 | */
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289 | void
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290 | draw_box(WINDOW * win, int y, int x, int height, int width,
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291 | chtype box, chtype border)
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292 | {
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293 | int i, j;
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294 |
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295 | wattrset(win, 0);
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296 | for (i = 0; i < height; i++) {
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297 | wmove(win, y + i, x);
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298 | for (j = 0; j < width; j++)
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299 | if (!i && !j)
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300 | waddch(win, border | ACS_ULCORNER);
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301 | else if (i == height - 1 && !j)
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302 | waddch(win, border | ACS_LLCORNER);
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303 | else if (!i && j == width - 1)
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304 | waddch(win, box | ACS_URCORNER);
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305 | else if (i == height - 1 && j == width - 1)
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306 | waddch(win, box | ACS_LRCORNER);
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307 | else if (!i)
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308 | waddch(win, border | ACS_HLINE);
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309 | else if (i == height - 1)
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310 | waddch(win, box | ACS_HLINE);
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311 | else if (!j)
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312 | waddch(win, border | ACS_VLINE);
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313 | else if (j == width - 1)
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314 | waddch(win, box | ACS_VLINE);
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315 | else
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316 | waddch(win, box | ' ');
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317 | }
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318 | }
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319 |
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320 | /*
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321 | * Draw shadows along the right and bottom edge to give a more 3D look
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322 | * to the boxes
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323 | */
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324 | void draw_shadow(WINDOW * win, int y, int x, int height, int width)
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325 | {
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326 | int i;
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327 |
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328 | if (has_colors()) { /* Whether terminal supports color? */
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329 | wattrset(win, shadow_attr);
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330 | wmove(win, y + height, x + 2);
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331 | for (i = 0; i < width; i++)
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332 | waddch(win, winch(win) & A_CHARTEXT);
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333 | for (i = y + 1; i < y + height + 1; i++) {
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334 | wmove(win, i, x + width);
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335 | waddch(win, winch(win) & A_CHARTEXT);
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336 | waddch(win, winch(win) & A_CHARTEXT);
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337 | }
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338 | wnoutrefresh(win);
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339 | }
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340 | }
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341 |
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342 | /*
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343 | * Return the position of the first alphabetic character in a string.
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344 | */
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345 | int first_alpha(const char *string, const char *exempt)
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346 | {
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347 | int i, in_paren = 0, c;
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348 |
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349 | for (i = 0; i < strlen(string); i++) {
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350 | c = tolower(string[i]);
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351 |
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352 | if (strchr("<[(", c))
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353 | ++in_paren;
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354 | if (strchr(">])", c) && in_paren > 0)
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355 | --in_paren;
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356 |
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357 | if ((!in_paren) && isalpha(c) && strchr(exempt, c) == 0)
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358 | return i;
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359 | }
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360 |
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361 | return 0;
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362 | }
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