util.c
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上传日期:2013-04-10
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文件大小:9k
- /*
- * util.c
- *
- * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
- * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include "dialog.h"
- /* use colors by default? */
- bool use_colors = 1;
- const char *backtitle = NULL;
- const char *dialog_result;
- /*
- * Attribute values, default is for mono display
- */
- chtype attributes[] =
- {
- A_NORMAL, /* screen_attr */
- A_NORMAL, /* shadow_attr */
- A_NORMAL, /* dialog_attr */
- A_BOLD, /* title_attr */
- A_NORMAL, /* border_attr */
- A_REVERSE, /* button_active_attr */
- A_DIM, /* button_inactive_attr */
- A_REVERSE, /* button_key_active_attr */
- A_BOLD, /* button_key_inactive_attr */
- A_REVERSE, /* button_label_active_attr */
- A_NORMAL, /* button_label_inactive_attr */
- A_NORMAL, /* inputbox_attr */
- A_NORMAL, /* inputbox_border_attr */
- A_NORMAL, /* searchbox_attr */
- A_BOLD, /* searchbox_title_attr */
- A_NORMAL, /* searchbox_border_attr */
- A_BOLD, /* position_indicator_attr */
- A_NORMAL, /* menubox_attr */
- A_NORMAL, /* menubox_border_attr */
- A_NORMAL, /* item_attr */
- A_REVERSE, /* item_selected_attr */
- A_BOLD, /* tag_attr */
- A_REVERSE, /* tag_selected_attr */
- A_BOLD, /* tag_key_attr */
- A_REVERSE, /* tag_key_selected_attr */
- A_BOLD, /* check_attr */
- A_REVERSE, /* check_selected_attr */
- A_BOLD, /* uarrow_attr */
- A_BOLD /* darrow_attr */
- };
- #include "colors.h"
- /*
- * Table of color values
- */
- int color_table[][3] =
- {
- {SCREEN_FG, SCREEN_BG, SCREEN_HL},
- {SHADOW_FG, SHADOW_BG, SHADOW_HL},
- {DIALOG_FG, DIALOG_BG, DIALOG_HL},
- {TITLE_FG, TITLE_BG, TITLE_HL},
- {BORDER_FG, BORDER_BG, BORDER_HL},
- {BUTTON_ACTIVE_FG, BUTTON_ACTIVE_BG, BUTTON_ACTIVE_HL},
- {BUTTON_INACTIVE_FG, BUTTON_INACTIVE_BG, BUTTON_INACTIVE_HL},
- {BUTTON_KEY_ACTIVE_FG, BUTTON_KEY_ACTIVE_BG, BUTTON_KEY_ACTIVE_HL},
- {BUTTON_KEY_INACTIVE_FG, BUTTON_KEY_INACTIVE_BG, BUTTON_KEY_INACTIVE_HL},
- {BUTTON_LABEL_ACTIVE_FG, BUTTON_LABEL_ACTIVE_BG, BUTTON_LABEL_ACTIVE_HL},
- {BUTTON_LABEL_INACTIVE_FG, BUTTON_LABEL_INACTIVE_BG,
- BUTTON_LABEL_INACTIVE_HL},
- {INPUTBOX_FG, INPUTBOX_BG, INPUTBOX_HL},
- {INPUTBOX_BORDER_FG, INPUTBOX_BORDER_BG, INPUTBOX_BORDER_HL},
- {SEARCHBOX_FG, SEARCHBOX_BG, SEARCHBOX_HL},
- {SEARCHBOX_TITLE_FG, SEARCHBOX_TITLE_BG, SEARCHBOX_TITLE_HL},
- {SEARCHBOX_BORDER_FG, SEARCHBOX_BORDER_BG, SEARCHBOX_BORDER_HL},
- {POSITION_INDICATOR_FG, POSITION_INDICATOR_BG, POSITION_INDICATOR_HL},
- {MENUBOX_FG, MENUBOX_BG, MENUBOX_HL},
- {MENUBOX_BORDER_FG, MENUBOX_BORDER_BG, MENUBOX_BORDER_HL},
- {ITEM_FG, ITEM_BG, ITEM_HL},
- {ITEM_SELECTED_FG, ITEM_SELECTED_BG, ITEM_SELECTED_HL},
- {TAG_FG, TAG_BG, TAG_HL},
- {TAG_SELECTED_FG, TAG_SELECTED_BG, TAG_SELECTED_HL},
- {TAG_KEY_FG, TAG_KEY_BG, TAG_KEY_HL},
- {TAG_KEY_SELECTED_FG, TAG_KEY_SELECTED_BG, TAG_KEY_SELECTED_HL},
- {CHECK_FG, CHECK_BG, CHECK_HL},
- {CHECK_SELECTED_FG, CHECK_SELECTED_BG, CHECK_SELECTED_HL},
- {UARROW_FG, UARROW_BG, UARROW_HL},
- {DARROW_FG, DARROW_BG, DARROW_HL},
- }; /* color_table */
- /*
- * Set window to attribute 'attr'
- */
- void
- attr_clear (WINDOW * win, int height, int width, chtype attr)
- {
- int i, j;
- wattrset (win, attr);
- for (i = 0; i < height; i++) {
- wmove (win, i, 0);
- for (j = 0; j < width; j++)
- waddch (win, ' ');
- }
- touchwin (win);
- }
- void dialog_clear (void)
- {
- attr_clear (stdscr, LINES, COLS, screen_attr);
- /* Display background title if it exists ... - SLH */
- if (backtitle != NULL) {
- int i;
- wattrset (stdscr, screen_attr);
- mvwaddstr (stdscr, 0, 1, (char *)backtitle);
- wmove (stdscr, 1, 1);
- for (i = 1; i < COLS - 1; i++)
- waddch (stdscr, ACS_HLINE);
- }
- wnoutrefresh (stdscr);
- }
- /*
- * Do some initialization for dialog
- */
- void
- init_dialog (void)
- {
- initscr (); /* Init curses */
- keypad (stdscr, TRUE);
- cbreak ();
- noecho ();
- if (use_colors) /* Set up colors */
- color_setup ();
- dialog_clear ();
- }
- /*
- * Setup for color display
- */
- void
- color_setup (void)
- {
- int i;
- if (has_colors ()) { /* Terminal supports color? */
- start_color ();
- /* Initialize color pairs */
- for (i = 0; i < ATTRIBUTE_COUNT; i++)
- init_pair (i + 1, color_table[i][0], color_table[i][1]);
- /* Setup color attributes */
- for (i = 0; i < ATTRIBUTE_COUNT; i++)
- attributes[i] = C_ATTR (color_table[i][2], i + 1);
- }
- }
- /*
- * End using dialog functions.
- */
- void
- end_dialog (void)
- {
- endwin ();
- }
- /*
- * Print a string of text in a window, automatically wrap around to the
- * next line if the string is too long to fit on one line. Newline
- * characters 'n' are replaced by spaces. We start on a new line
- * if there is no room for at least 4 nonblanks following a double-space.
- */
- void
- print_autowrap (WINDOW * win, const char *prompt, int width, int y, int x)
- {
- int newl, cur_x, cur_y;
- int i, prompt_len, room, wlen;
- char tempstr[MAX_LEN + 1], *word, *sp, *sp2;
- strcpy (tempstr, prompt);
- prompt_len = strlen(tempstr);
-
- /*
- * Remove newlines
- */
- for(i=0; i<prompt_len; i++) {
- if(tempstr[i] == 'n') tempstr[i] = ' ';
- }
- if (prompt_len <= width - x * 2) { /* If prompt is short */
- wmove (win, y, (width - prompt_len) / 2);
- waddstr (win, tempstr);
- } else {
- cur_x = x;
- cur_y = y;
- newl = 1;
- word = tempstr;
- while (word && *word) {
- sp = index(word, ' ');
- if (sp)
- *sp++ = 0;
- /* Wrap to next line if either the word does not fit,
- or it is the first word of a new sentence, and it is
- short, and the next word does not fit. */
- room = width - cur_x;
- wlen = strlen(word);
- if (wlen > room ||
- (newl && wlen < 4 && sp && wlen+1+strlen(sp) > room
- && (!(sp2 = index(sp, ' ')) || wlen+1+(sp2-sp) > room))) {
- cur_y++;
- cur_x = x;
- }
- wmove (win, cur_y, cur_x);
- waddstr (win, word);
- getyx (win, cur_y, cur_x);
- cur_x++;
- if (sp && *sp == ' ') {
- cur_x++; /* double space */
- while (*++sp == ' ');
- newl = 1;
- } else
- newl = 0;
- word = sp;
- }
- }
- }
- /*
- * Print a button
- */
- void
- print_button (WINDOW * win, const char *label, int y, int x, int selected)
- {
- int i, temp;
- wmove (win, y, x);
- wattrset (win, selected ? button_active_attr : button_inactive_attr);
- waddstr (win, "<");
- temp = strspn (label, " ");
- label += temp;
- wattrset (win, selected ? button_label_active_attr
- : button_label_inactive_attr);
- for (i = 0; i < temp; i++)
- waddch (win, ' ');
- wattrset (win, selected ? button_key_active_attr
- : button_key_inactive_attr);
- waddch (win, label[0]);
- wattrset (win, selected ? button_label_active_attr
- : button_label_inactive_attr);
- waddstr (win, (char *)label + 1);
- wattrset (win, selected ? button_active_attr : button_inactive_attr);
- waddstr (win, ">");
- wmove (win, y, x + temp + 1);
- }
- /*
- * Draw a rectangular box with line drawing characters
- */
- void
- draw_box (WINDOW * win, int y, int x, int height, int width,
- chtype box, chtype border)
- {
- int i, j;
- wattrset (win, 0);
- for (i = 0; i < height; i++) {
- wmove (win, y + i, x);
- for (j = 0; j < width; j++)
- if (!i && !j)
- waddch (win, border | ACS_ULCORNER);
- else if (i == height - 1 && !j)
- waddch (win, border | ACS_LLCORNER);
- else if (!i && j == width - 1)
- waddch (win, box | ACS_URCORNER);
- else if (i == height - 1 && j == width - 1)
- waddch (win, box | ACS_LRCORNER);
- else if (!i)
- waddch (win, border | ACS_HLINE);
- else if (i == height - 1)
- waddch (win, box | ACS_HLINE);
- else if (!j)
- waddch (win, border | ACS_VLINE);
- else if (j == width - 1)
- waddch (win, box | ACS_VLINE);
- else
- waddch (win, box | ' ');
- }
- }
- /*
- * Draw shadows along the right and bottom edge to give a more 3D look
- * to the boxes
- */
- void
- draw_shadow (WINDOW * win, int y, int x, int height, int width)
- {
- int i;
- if (has_colors ()) { /* Whether terminal supports color? */
- wattrset (win, shadow_attr);
- wmove (win, y + height, x + 2);
- for (i = 0; i < width; i++)
- waddch (win, winch (win) & A_CHARTEXT);
- for (i = y + 1; i < y + height + 1; i++) {
- wmove (win, i, x + width);
- waddch (win, winch (win) & A_CHARTEXT);
- waddch (win, winch (win) & A_CHARTEXT);
- }
- wnoutrefresh (win);
- }
- }
- /*
- * Return the position of the first alphabetic character in a string.
- */
- int
- first_alpha(const char *string, const char *exempt)
- {
- int i, in_paren=0, c;
- for (i = 0; i < strlen(string); i++) {
- c = tolower(string[i]);
- if (strchr("<[(", c)) ++in_paren;
- if (strchr(">])", c)) --in_paren;
- if ((! in_paren) && isalpha(c) &&
- strchr(exempt, c) == 0)
- return i;
- }
- return 0;
- }