/* * nvidia-installer: A tool for installing NVIDIA software packages on * Unix and Linux systems. * * Copyright (C) 2003 NVIDIA Corporation * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * 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, see . * * * ncurses_ui.c - implementation of the nvidia-installer ui using ncurses. */ #include #include #include #include #include #include "nvidia-installer.h" #include "nvidia-installer-ui.h" /* structures */ /* * RegionStruct - a region is sort of like an ncurses window, but * implemented completely in this source file (ie: doesn't use ncurses * windows). I found enough bugs with ncurses windows that I felt it * better to avoid their use altogether. */ typedef struct { int x, y, w, h; /* position and dimensions relative to stdscr */ int attr; /* attributes (to be passed to setattr()) */ char *line; /* a string filled with spaces; its length is the width of the region. This is just a convenience for use when clearing the region */ } RegionStruct; /* * PagerStruct - Pager implements the functionality of `less` */ typedef struct { TextRows *t; /* rows of text to be displayed */ RegionStruct *region; /* region in which the text will be displayed */ const char *label; /* label for the left side of the footer */ int cur; /* current position in the pager */ int page; /* height of a page (for use with pgup/pgdn) */ } PagerStruct; /* * DataStruct - private data structure that gets plugged into * Options->ui_priv. */ typedef struct { RegionStruct *header; /* header region */ RegionStruct *footer; /* footer region */ RegionStruct *message; /* message region */ FormatTextRows format_text_rows; /* XXX function pointer from installer */ bool use_color; /* should the ncurses ui use color? */ int width; /* cached copy of the terminal dimensions */ int height; char *title; /* cached strings for the header and footer */ char *footer_left; char *footer_right; char *progress_title; /* cached string for the title of the progress messages */ } DataStruct; /* constants */ /* default strings for the header and footer */ #define NV_NCURSES_DEFAULT_TITLE "NVIDIA Software Installer for Unix/Linux" #define NV_NCURSES_DEFAULT_FOOTER_LEFT NV_NCURSES_DEFAULT_TITLE #define NV_NCURSES_DEFAULT_FOOTER_RIGHT "www.nvidia.com" /* indices for color pairs */ #define NV_NCURSES_HEADER_COLOR_IDX 1 #define NV_NCURSES_MESSAGE_COLOR_IDX 2 #define NV_NCURSES_BUTTON_COLOR_IDX 3 #define NV_NCURSES_INPUT_COLOR_IDX 4 #define NV_NCURSES_HEADER_COLOR (COLOR_PAIR(NV_NCURSES_HEADER_COLOR_IDX)) #define NV_NCURSES_FOOTER_COLOR A_REVERSE #define NV_NCURSES_MESSAGE_COLOR (COLOR_PAIR(NV_NCURSES_MESSAGE_COLOR_IDX)) #define NV_NCURSES_BUTTON_COLOR (COLOR_PAIR(NV_NCURSES_BUTTON_COLOR_IDX)) #define NV_NCURSES_INPUT_COLOR (COLOR_PAIR(NV_NCURSES_INPUT_COLOR_IDX)) #define NV_NCURSES_HEADER_NO_COLOR A_REVERSE #define NV_NCURSES_FOOTER_NO_COLOR A_REVERSE #define NV_NCURSES_MESSAGE_NO_COLOR A_NORMAL /* use when animating button presses */ #define NV_NCURSES_BUTTON_PRESS_TIME 125000 #define NV_NCURSES_TAB 9 #define NV_NCURSES_ENTER 10 #define NV_NCURSES_BACKSPACE 8 #define NV_NCURSES_CTRL(x) ((x) & 0x1f) /* * somewhat arbitrary minimum values: if the current window size is * smaller than this, don't attempt to use the ncurses ui. */ #define NV_NCURSES_MIN_WIDTH 40 #define NV_NCURSES_MIN_HEIGHT 10 #define NV_NCURSES_HLINE '_' /* prototypes for ui entry points */ static int nv_ncurses_detect (Options*); static int nv_ncurses_init (Options*, FormatTextRows format_text_rows); static void nv_ncurses_set_title (Options*, const char*); static char *nv_ncurses_get_input (Options*, const char*, const char*); static int nv_ncurses_display_license (Options*, const char*); static void nv_ncurses_message (Options*, const int level, const char*); static void nv_ncurses_command_output (Options*, const char*); static int nv_ncurses_approve_command_list(Options*, CommandList*, const char*); static int nv_ncurses_yes_no (Options*, const int, const char*); static void nv_ncurses_status_begin (Options*, const char*, const char*); static void nv_ncurses_status_update (Options*, const float, const char*); static void nv_ncurses_status_end (Options*, const char*); static void nv_ncurses_close (Options*); /* helper functions for manipulating the header and footer */ static void nv_ncurses_set_header(DataStruct *, const char *); static void nv_ncurses_set_footer(DataStruct *, const char *, const char *); /* helper functions for manipulating RegionStructs */ static RegionStruct *nv_ncurses_create_region(DataStruct *, int, int, int, int, int, int); static void nv_ncurses_clear_region(RegionStruct *); static void nv_ncurses_destroy_region(RegionStruct *); /* helper functions for drawing buttons */ static void nv_ncurses_draw_button(DataStruct *, RegionStruct *, int, int, int, int, char *, bool, bool); static void nv_ncurses_erase_button(RegionStruct *, int, int, int, int); /* helper functions for drawing regions and stuff */ static void nv_ncurses_do_message_region(DataStruct *, const char *, const char *, int, int); static void nv_ncurses_do_progress_bar_region(DataStruct *); static void nv_ncurses_do_progress_bar_message(DataStruct *, const char *, int, int); /* pager functions */ static PagerStruct *nv_ncurses_create_pager(DataStruct *, int, int, int, int, TextRows *, const char *, int); static void nv_ncurses_pager_update(DataStruct *, PagerStruct *); static void nv_ncurses_pager_handle_events(DataStruct *, PagerStruct *, int); static void nv_ncurses_destroy_pager(PagerStruct *); /* progress bar helper functions */ static int choose_char(int i, int p[4], char v[4], char def); static void init_percentage_string(char v[4], int n); static void init_position(int p[4], int w); /* misc helper functions */ static TextRows *nv_ncurses_create_command_list_textrows(DataStruct *, CommandList *, int); static char *nv_ncurses_mode_to_permission_string(mode_t); static void nv_ncurses_concat_text_rows(TextRows *, TextRows *); static void nv_ncurses_free_text_rows(TextRows *); static int nv_ncurses_format_print(DataStruct *, RegionStruct *, int, int, int, int, TextRows *t); static int nv_ncurses_check_resize(DataStruct *, bool); /* dispatch table that gets dlsym()'ed by ui_init() */ InstallerUI ui_dispatch_table = { nv_ncurses_detect, nv_ncurses_init, nv_ncurses_set_title, nv_ncurses_get_input, nv_ncurses_display_license, nv_ncurses_message, nv_ncurses_command_output, nv_ncurses_approve_command_list, nv_ncurses_yes_no, nv_ncurses_status_begin, nv_ncurses_status_update, nv_ncurses_status_end, nv_ncurses_close }; /* * nv_ncurses_detect() - initialize ncurses; return FALSE if * initialization fails */ static int nv_ncurses_detect(Options *op) { int x, y; if (!initscr()) return FALSE; /* * query the current size of the window, and don't try to use the * ncurses ui if it's too small. */ getmaxyx(stdscr, y, x); if ((x < NV_NCURSES_MIN_WIDTH) || (y < NV_NCURSES_MIN_HEIGHT)) { endwin(); return FALSE; } return TRUE; } /* nv_ncurses_detect() */ /* * nv_ncurses_init() - initialize the ncurses interface. */ static int nv_ncurses_init(Options *op, FormatTextRows format_text_rows) { DataStruct *d; d = (DataStruct *) malloc(sizeof(DataStruct)); memset(d, 0, sizeof(DataStruct)); d->format_text_rows = format_text_rows; /* initialize color */ d->use_color = !op->no_ncurses_color; if (d->use_color) { if (!has_colors()) { d->use_color = FALSE; } } if (d->use_color) { if (start_color() == ERR) { d->use_color = FALSE; } else { /* foreground background */ init_pair(NV_NCURSES_HEADER_COLOR_IDX, COLOR_BLACK, COLOR_GREEN); init_pair(NV_NCURSES_MESSAGE_COLOR_IDX, COLOR_WHITE, COLOR_BLUE); init_pair(NV_NCURSES_BUTTON_COLOR_IDX, COLOR_WHITE, COLOR_RED); init_pair(NV_NCURSES_INPUT_COLOR_IDX, COLOR_GREEN, COLOR_BLACK); } } clear(); /* clear the screen */ noecho(); /* don't echo input to the screen */ cbreak(); /* disable line buffering and control characters */ curs_set(0); /* make the cursor invisible */ keypad(stdscr, TRUE); /* enable keypad, function keys, arrow keys, etc */ getmaxyx(stdscr, d->height, d->width); /* get current window dimensions */ /* create the regions */ d->header = nv_ncurses_create_region(d, 1, 0, d->width - 2, 1, NV_NCURSES_HEADER_COLOR, NV_NCURSES_HEADER_NO_COLOR); d->footer = nv_ncurses_create_region(d, 1, d->height - 2, d->width - 2, 1, NV_NCURSES_FOOTER_COLOR, NV_NCURSES_FOOTER_NO_COLOR); /* plug the DataStruct struct into the ui_priv pointer */ op->ui_priv = (void *) d; /* set the initial strings in the header and footer */ nv_ncurses_set_header(d, NV_NCURSES_DEFAULT_TITLE); nv_ncurses_set_footer(d, NV_NCURSES_DEFAULT_FOOTER_LEFT, NV_NCURSES_DEFAULT_FOOTER_RIGHT); refresh(); return TRUE; } /* nv_ncurses_init() */ /* * nv_ncurses_set_title() - update the string in the header region */ static void nv_ncurses_set_title(Options *op, const char *title) { DataStruct *d = (DataStruct *) op->ui_priv; nv_ncurses_set_header(d, title); refresh(); } /* nv_ncurses_set_title() */ /* * nv_ncurses_get_input - prompt for user input with the given msg; * returns the user inputed string. */ #define MIN_INPUT_LEN 32 #define MAX_BUF_LEN 1024 #define BUF_CHAR(c) ((c) ? (c) : ' ') static char *nv_ncurses_get_input(Options *op, const char *def, const char *msg) { DataStruct *d = (DataStruct *) op->ui_priv; int msg_len, width, input_len, buf_len, def_len; int input_x, input_y, i, w, h, x, y, c, lines, ch, color, redraw; char *tmp, buf[MAX_BUF_LEN]; TextRows *t; if (!msg) return NULL; nv_ncurses_check_resize(d, FALSE); color = d->use_color ? NV_NCURSES_INPUT_COLOR : A_REVERSE; /* concatenate ": " to the end of the message */ msg_len = strlen(msg) + 2; tmp = (char *) malloc(msg_len + 1); snprintf(tmp, msg_len, "%s: ", msg); /* copy the default response into the buffer */ memset(buf, 0, MAX_BUF_LEN); if (def) strncpy(buf, def, MAX_BUF_LEN); draw_get_input: /* free any existing message region */ if (d->message) { nv_ncurses_destroy_region(d->message); d->message = NULL; } /* * compute the size of the input box: the input box is twice the * length of the default string, clamped to MIN_INPUT_LEN */ def_len = def ? strlen(def) : 0; input_len = NV_MAX(def_len * 2, MIN_INPUT_LEN); width = d->width - 4; /* convert the message to text rows */ t = d->format_text_rows(NULL, tmp, width, TRUE); /* * if the message and input box will fit on one line, do that; * otherwise, place them on separate lines */ if ((msg_len + input_len + 1) < width) { input_x = 1 + msg_len; lines = 1; } else { input_x = 2; lines = t->n + 1; } input_y = lines; /* * compute the width, height, and starting position of the message * region */ w = d->width - 2; h = lines + 2; x = 1; y = ((d->height - (3 + h)) / 3) + 1; /* create the message region */ d->message = nv_ncurses_create_region(d, x, y, w, h, NV_NCURSES_MESSAGE_COLOR, NV_NCURSES_MESSAGE_NO_COLOR); nv_ncurses_format_print(d, d->message, 1, 1, d->message->w - 2, lines, t); /* free the text rows */ nv_ncurses_free_text_rows(t); /* clamp the input box to the width of the region */ input_len = NV_MIN(input_len, width - 2); curs_set(1); /* make the cursor visible */ c = buf_len = strlen(buf); redraw = TRUE; /* force a redraw the first time through */ /* offset input_x and input_y by the region offset */ input_x += d->message->x; input_y += d->message->y; do { x = NV_MAX(c - (input_len - 1), 0); /* redraw the input box */ if (redraw) { for (i = 0; i < input_len; i++) { mvaddch(input_y, input_x + i, BUF_CHAR(buf[i + x]) | color); } /* if we're scrolling, display an arrow */ if (x > 0) { mvaddch(input_y, input_x - 1, '<' | d->message->attr); } else { mvaddch(input_y, input_x - 1, ' ' | d->message->attr); } if (buf_len > (input_len - 1 + x)) { mvaddch(input_y, input_x + input_len, '>' | d->message->attr); } else { mvaddch(input_y, input_x + input_len, ' ' | d->message->attr); } redraw = FALSE; } /* position the cursor */ move(input_y, input_x - x + c); refresh(); /* wait for input */ if (nv_ncurses_check_resize(d, FALSE)) goto draw_get_input; ch = getch(); switch (ch) { case NV_NCURSES_BACKSPACE: case KEY_BACKSPACE: /* * If there is a character to be deleted, move everything * after the character forward, and decrement c and len. */ if (c <= 0) break; for (i = c; i <= buf_len; i++) buf[i-1] = buf[i]; c--; buf_len--; redraw = TRUE; break; case KEY_DC: /* * If there is a character to be deleted, move everything * after the character forward, and decrement len. */ if (c == buf_len) break; for (i = c; i < buf_len; i++) buf[i] = buf[i+1]; buf_len--; redraw = TRUE; break; case KEY_LEFT: if (c > 0) { c--; redraw = TRUE; } break; case KEY_RIGHT: if (c < buf_len) { c++; redraw = TRUE; } break; case NV_NCURSES_CTRL('L'): nv_ncurses_check_resize(d, TRUE); goto draw_get_input; break; } /* * If we have a printable character, then move everything * after the current location back, and insert the character. */ if (isprint(ch)) { if (buf_len < (MAX_BUF_LEN - 1)) { for (i = buf_len; i > c; i--) buf[i] = buf[i-1]; buf[c] = (char) ch; buf_len++; c++; redraw = TRUE; } } if (op->debug) { mvprintw(d->message->y, d->message->x, "c: %3d ch: %04o (%d)", c, ch, ch); clrtoeol(); redraw = TRUE; } } while (ch != NV_NCURSES_ENTER); /* free the message region */ nv_ncurses_destroy_region(d->message); d->message = NULL; curs_set(0); /* make the cursor invisible */ refresh(); free(tmp); tmp = strdup(buf); return tmp; } /* nv_ncurses_get_input() */ /* * nv_ncurses_display_license() - print the text from the license file, * prompt for acceptance from the user, and return whether or not the * user accepted. */ static int nv_ncurses_display_license(Options *op, const char *license) { DataStruct *d = (DataStruct *) op->ui_priv; TextRows *t_pager = NULL; int ch, x, cur = 0; int button_width, button_y, accept_x, no_accept_x, accepted; PagerStruct *p = NULL; char *str; static const char *descr = "Please read the following LICENSE " "and then select either \"Accept\" to accept the license " "and continue with the installation, or select " "\"Do Not Accept\" to abort the installation."; nv_ncurses_check_resize(d, FALSE); accepted = FALSE; draw_license: /* free the pager, and pager's text rows */ if (d->message) nv_ncurses_destroy_region(d->message); if (p) nv_ncurses_destroy_pager(p); if (t_pager) nv_ncurses_free_text_rows(t_pager); /* create the message region and print descr in it */ nv_ncurses_do_message_region(d, NULL, descr, TRUE, 2); /* draw the accept buttons */ button_width = 15; button_y = d->message->h - 2; accept_x = (d->message->w - (button_width * 3)) / 2; no_accept_x = accept_x + (button_width * 2); nv_ncurses_draw_button(d, d->message, accept_x, button_y, button_width, 1, "Accept", accepted, FALSE); nv_ncurses_draw_button(d, d->message, no_accept_x, button_y, button_width, 1, "Do Not Accept", !accepted, FALSE); /* init the pager to display the license */ t_pager = d->format_text_rows(NULL, license, d->message->w, TRUE); p = nv_ncurses_create_pager(d, 1, d->message->h + 2, d->message->w, d->height - d->message->h - 4, t_pager, "NVIDIA Software License", cur); refresh(); /* process key strokes */ do { /* if a resize occurred, jump back to the top and redraw */ if (nv_ncurses_check_resize(d, FALSE)) { cur = p->cur; goto draw_license; } ch = getch(); switch (ch) { case NV_NCURSES_TAB: case KEY_LEFT: case KEY_RIGHT: /* * any of left, right, and tab will toggle which button is * selected */ accepted ^= 1; nv_ncurses_draw_button(d, d->message, accept_x, button_y, button_width, 1, "Accept", accepted, FALSE); nv_ncurses_draw_button(d, d->message, no_accept_x, button_y, button_width, 1, "Do Not Accept", !accepted, FALSE); refresh(); break; case NV_NCURSES_CTRL('L'): nv_ncurses_check_resize(d, TRUE); cur = p->cur; goto draw_license; break; default: break; } nv_ncurses_pager_handle_events(d, p, ch); } while (ch != NV_NCURSES_ENTER); /* animate the button being pushed down */ x = accepted ? accept_x : no_accept_x; str = accepted ? "Accept" : "Do Not Accept"; nv_ncurses_erase_button(d->message, x, button_y, button_width, 1); nv_ncurses_draw_button(d, d->message, x, button_y, button_width, 1, str, TRUE, TRUE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); nv_ncurses_erase_button(d->message, x, button_y, button_width, 1); nv_ncurses_draw_button(d, d->message, x, button_y, button_width, 1, str, TRUE, FALSE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); /* free the text rows used by the pager */ nv_ncurses_free_text_rows(t_pager); /* free the pager */ nv_ncurses_destroy_pager(p); /* restore the footer */ nv_ncurses_set_footer(d, NV_NCURSES_DEFAULT_FOOTER_LEFT, NV_NCURSES_DEFAULT_FOOTER_RIGHT); /* free the message region */ nv_ncurses_destroy_region(d->message); d->message = NULL; refresh(); return accepted; } /* nv_ncurses_display_license() */ /* * nv_ncurses_message() - print a message */ static void nv_ncurses_message(Options *op, int level, const char *msg) { DataStruct *d = (DataStruct *) op->ui_priv; int w, h, x, y, ch; char *prefix; if (!msg) return; /* XXX for now, log messages are ignored by the ncurses ui */ if (level == NV_MSG_LEVEL_LOG) return; /* determine the prefix for the message from the message level */ switch(level) { case NV_MSG_LEVEL_MESSAGE: prefix = NULL; break; case NV_MSG_LEVEL_WARNING: prefix = "WARNING: "; break; case NV_MSG_LEVEL_ERROR: prefix = "ERROR: "; break; default: return; } draw_message: if (d->message) { /* * XXX we may already have a message region allocated when we * enter nv_ncurses_message(): we may have been in the middle * of displaying a progress bar when we encountered an error * that we need to report. To deal with this situation, throw * out the existing message region; nv_ncurses_status_update() * and nv_ncurses_status_end() will have to recreate their * message region. */ nv_ncurses_destroy_region(d->message); d->message = NULL; } /* create the message region and print msg in it */ nv_ncurses_do_message_region(d, prefix, msg, FALSE, 2); /* init the dimensions of the button */ w = 6; h = 1; x = (d->message->w - w) / 2; y = d->message->h - 2; /* draw the OK button */ nv_ncurses_draw_button(d, d->message, x, y, w, h, "OK", TRUE, FALSE); refresh(); /* wait for enter */ do { /* if a resize occurred, jump back to the top and redraw */ if (nv_ncurses_check_resize(d, FALSE)) goto draw_message; ch = getch(); switch (ch) { case NV_NCURSES_CTRL('L'): nv_ncurses_check_resize(d, TRUE); goto draw_message; break; } } while (ch != NV_NCURSES_ENTER); /* animate the button being pushed down */ nv_ncurses_erase_button(d->message, x, y, w, h); nv_ncurses_draw_button(d, d->message, x, y, w, h, "OK", TRUE, TRUE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); nv_ncurses_erase_button(d->message, x, y, w, h); nv_ncurses_draw_button(d, d->message, x, y, w, h, "OK", TRUE, FALSE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); /* free the message region */ nv_ncurses_destroy_region(d->message); d->message = NULL; refresh(); } /* nv_ncurses_message() */ /* * nv_ncurses_command_output() - drop this on the floor, for now. */ static void nv_ncurses_command_output(Options *op, const char *msg) { /* * XXX we don't currently display command output in the ncurses ui */ return; } /* nv_ncurses_command_output() */ /* * nv_ncurses_approve_command_list() - list all the commands that will be * executed, and ask for approval. */ static int nv_ncurses_approve_command_list(Options *op, CommandList *cl, const char *descr) { DataStruct *d = (DataStruct *) op->ui_priv; TextRows *t_pager = NULL; PagerStruct *p = NULL; char *str, *question; int button_w, button_y, yes_x, no_x; int len, ch, x, yes, cur = 0; /* initialize the question string */ len = strlen(descr) + 256; question = (char *) malloc(len + 1); snprintf(question, len, "The following operations will be performed to " "install the %s. Is this acceptable?", descr); /* check if the window was resized */ nv_ncurses_check_resize(d, FALSE); yes = 1; draw_command_list: /* free any existing message region, pager, and pager textrows */ if (d->message) { nv_ncurses_destroy_region(d->message); d->message = NULL; } if (p) nv_ncurses_destroy_pager(p); if (t_pager) nv_ncurses_free_text_rows(t_pager); /* create the message region and print descr in it */ nv_ncurses_do_message_region(d, NULL, question, TRUE, 2); /* draw the yes/no buttons */ button_w = 7; button_y = d->message->h - 2; yes_x = (d->message->w - button_w*3)/2 + 0; no_x = (d->message->w - button_w*3)/2 + 2*button_w; nv_ncurses_draw_button(d, d->message, yes_x, button_y, button_w, 1, "Yes", yes, FALSE); nv_ncurses_draw_button(d, d->message, no_x, button_y, button_w, 1, "No", !yes, FALSE); /* draw the command list */ t_pager = nv_ncurses_create_command_list_textrows(d, cl, d->message->w); p = nv_ncurses_create_pager(d, 1, d->message->h + 2, d->message->w, d->height - d->message->h - 4, t_pager, "Proposed Commandlist", cur); refresh(); /* process key strokes */ do { /* if a resize occurred, jump back to the top and redraw */ if (nv_ncurses_check_resize(d, FALSE)) { cur = p->cur; goto draw_command_list; } ch = getch(); switch (ch) { case NV_NCURSES_TAB: case KEY_LEFT: case KEY_RIGHT: /* * any of left, right, and tab will toggle which button is * selected */ yes ^= 1; nv_ncurses_draw_button(d, d->message, yes_x, button_y, button_w, 1, "Yes", yes, FALSE); nv_ncurses_draw_button(d, d->message, no_x, button_y, button_w, 1, "No", !yes, FALSE); refresh(); break; case NV_NCURSES_CTRL('L'): nv_ncurses_check_resize(d, TRUE); cur = p->cur; goto draw_command_list; break; default: break; } nv_ncurses_pager_handle_events(d, p, ch); } while (ch != NV_NCURSES_ENTER); /* animate the button being pushed down */ x = yes ? yes_x : no_x; str = yes ? "Yes" : "No"; nv_ncurses_erase_button(d->message, x, button_y, button_w, 1); nv_ncurses_draw_button(d, d->message, x, button_y, button_w, 1, str, TRUE, TRUE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); nv_ncurses_erase_button(d->message, x, button_y, button_w, 1); nv_ncurses_draw_button(d, d->message, x, button_y, button_w, 1, str, TRUE, FALSE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); /* free the text rows used by the pager */ nv_ncurses_free_text_rows(t_pager); /* free the pager */ nv_ncurses_destroy_pager(p); /* restore the footer */ nv_ncurses_set_footer(d, NV_NCURSES_DEFAULT_FOOTER_LEFT, NV_NCURSES_DEFAULT_FOOTER_RIGHT); /* free the message region */ nv_ncurses_destroy_region(d->message); d->message = NULL; refresh(); free(question); return yes; } /* nv_ncurses_approve_command_list() */ /* * nv_ncurses_yes_no() - ask the yes/no question 'msg' and return TRUE for * yes, and FALSE for no. */ static int nv_ncurses_yes_no(Options *op, const int def, const char *msg) { DataStruct *d = (DataStruct *) op->ui_priv; int yes_x, no_x, x, y, w, h, yes, ch; char *str; if (!msg) return FALSE; /* check if the window was resized */ nv_ncurses_check_resize(d, FALSE); yes = def; draw_yes_no: if (d->message) { /* * XXX we may already have a message region allocated when we * enter nv_ncurses_yes_no(): we may have been in the middle * of displaying a progress bar when we encountered an error * that we need to report. To deal with this situation, throw * out the existing message region; nv_ncurses_status_update() * and nv_ncurses_status_end() will have to recreate their * message region. */ nv_ncurses_destroy_region(d->message); d->message = NULL; } /* create the message region and print the message in it */ nv_ncurses_do_message_region(d, NULL, msg, FALSE, 2); /* draw the yes/no buttons */ w = 7; h = 1; y = d->message->h - 2; yes_x = (d->message->w - w*3)/2 + 0; no_x = (d->message->w - w*3)/2 + 2*w; nv_ncurses_draw_button(d, d->message, yes_x, y, w, h, "Yes", yes,FALSE); nv_ncurses_draw_button(d, d->message, no_x, y, w, h, "No", !yes, FALSE); refresh(); /* process key strokes */ do { if (nv_ncurses_check_resize(d, FALSE)) goto draw_yes_no; ch = getch(); switch (ch) { case NV_NCURSES_TAB: case KEY_LEFT: case KEY_RIGHT: /* * any of left, right, and tab will toggle which button is * selected */ yes ^= 1; nv_ncurses_draw_button(d, d->message, yes_x, y, w, h, "Yes", yes, FALSE); nv_ncurses_draw_button(d, d->message, no_x, y, w, h, "No", !yes, FALSE); refresh(); break; case NV_NCURSES_CTRL('L'): nv_ncurses_check_resize(d, TRUE); goto draw_yes_no; break; default: break; } } while (ch != NV_NCURSES_ENTER); /* animate the button being pushed down */ x = yes ? yes_x : no_x; str = yes ? "Yes" : "No"; nv_ncurses_erase_button(d->message, x, y, w, h); nv_ncurses_draw_button(d, d->message, x, y, w, 1, str, TRUE, TRUE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); nv_ncurses_erase_button(d->message, x, y, w, h); nv_ncurses_draw_button(d, d->message, x, y, w, h, str, TRUE, FALSE); refresh(); usleep(NV_NCURSES_BUTTON_PRESS_TIME); /* free the message region */ nv_ncurses_destroy_region(d->message); d->message = NULL; refresh(); return yes; } /* nv_ncurses_yes_no() */ /* * nv_ncurses_status_begin() - initialize a progress bar */ static void nv_ncurses_status_begin(Options *op, const char *title, const char *msg) { DataStruct *d = (DataStruct *) op->ui_priv; nv_ncurses_check_resize(d, FALSE); /* cache the progress bar title */ d->progress_title = strdup(title); /* create the message region for use by the progress bar */ nv_ncurses_do_progress_bar_region(d); /* write the one line msg (truncating it, if need be) */ nv_ncurses_do_progress_bar_message(d, msg, d->message->h - 3, d->message->w); refresh(); } /* nv_ncurses_status_begin() */ /* * nv_ncurses_status_update() - update the progress bar */ static void nv_ncurses_status_update(Options *op, const float percent, const char *msg) { int i, n, h, ch; int p[4]; char v[4]; DataStruct *d = (DataStruct *) op->ui_priv; /* * if the message region was deleted or if the window was resized, * redraw the entire progress bar region. */ if (nv_ncurses_check_resize(d, FALSE) || !d->message) { if (d->message) nv_ncurses_destroy_region(d->message); nv_ncurses_do_progress_bar_region(d); } /* temporarily set getch() to non-blocking mode */ nodelay(stdscr, TRUE); while ((ch = getch()) != ERR) { /* * if the user explicitely requested that the screen be * redrawn by pressing CTRL-L, then also redraw the entire * progress bar egion. */ if (ch == NV_NCURSES_CTRL('L')) { nv_ncurses_check_resize(d, TRUE); if (d->message) nv_ncurses_destroy_region(d->message); nv_ncurses_do_progress_bar_region(d); } } /* set getch() back to blocking mode */ nodelay(stdscr, FALSE); /* compute the percentage */ n = ((int) (percent * (float) (d->message->w - 2))); n = NV_MAX(n, 2); init_position(p, d->message->w); init_percentage_string(v, (int) (100.0 * percent)); h = d->message->h; /* write the one line msg (truncating it, if need be) */ nv_ncurses_do_progress_bar_message(d, msg, h - 3, d->message->w - 2); /* draw the progress bar */ if (d->use_color) { for (i = 1; i <= n; i++) { mvaddch(d->message->y + h - 2, d->message->x + i, choose_char(i, p, v,' ') | A_REVERSE | NV_NCURSES_INPUT_COLOR); } for (i = 0; i < 4; i++) { if (p[i] >= (n+1)) { mvaddch(d->message->y + h - 2, d->message->x + p[i], (v[i] ? v[i] : ' ') | NV_NCURSES_INPUT_COLOR); } } } else { for (i = 2; i < n; i++) { mvaddch(d->message->y + h - 2, d->message->x + i, choose_char(i, p, v, ' ') | A_REVERSE); } for (i = 0; i < 4; i++) { if (p[i] >= n) { mvaddch(d->message->y + h - 2, d->message->x + p[i], v[i] ? v[i] : '-'); } } } refresh(); } /* nv_ncurses_status_update() */ /* * nv_ncurses_status_end() - draw the progress bar at 100% */ static void nv_ncurses_status_end(Options *op, const char *msg) { int i, n, h; int p[4]; char v[4]; DataStruct *d = (DataStruct *) op->ui_priv; /* * if the message region was deleted or if the window was resized, * redraw the entire progress bar region. */ if (nv_ncurses_check_resize(d, FALSE) || !d->message) { if (d->message) nv_ncurses_destroy_region(d->message); nv_ncurses_do_progress_bar_region(d); } n = d->message->w - 2; init_position(p, d->message->w); init_percentage_string(v, 100.0); h = d->message->h; /* write the one line msg (truncating it, if need be) */ nv_ncurses_do_progress_bar_message(d, msg, h - 3, d->message->w - 2); /* draw the complete progress bar */ if (d->use_color) { for (i = 1; i < (n+1); i++) { mvaddch(d->message->y + h - 2, d->message->x + i, choose_char(i, p, v, ' ') | A_REVERSE | NV_NCURSES_INPUT_COLOR); } } else { for (i = 2; i < (n); i++) { mvaddch(d->message->y + h - 2, d->message->x + i, choose_char(i, p, v, ' ') | A_REVERSE); } } refresh(); free(d->progress_title); d->progress_title = NULL; /* XXX don't free the message window, yet... */ } /* nv_ncurses_status_end() */ /* * nv_ncurses_close() - close the ui: free any memory we allocated, * and end curses mode. */ static void nv_ncurses_close(Options *op) { DataStruct *d = NULL; if (op) { /* XXX op may be NULL if we get called from a signal handler */ d = (DataStruct *) op->ui_priv; nv_ncurses_destroy_region(d->header); nv_ncurses_destroy_region(d->footer); free(d); } clear(); refresh(); endwin(); /* End curses mode */ return; } /* nv_ncurses_close() */ /****************************************************************************/ /* * internal helper functions for manipulating the header and footer */ /* * nv_ncurses_set_header() - write the title to the header region; * note that this function does not call refresh() */ static void nv_ncurses_set_header(DataStruct *d, const char *title) { int x, y; char *tmp; tmp = strdup(title); if (d->title) free(d->title); d->title = tmp; x = (d->header->w - strlen(d->title)) / 2; y = 0; attrset(d->header->attr); nv_ncurses_clear_region(d->header); mvaddstr(d->header->y + y, d->header->x + x, (char *) d->title); attrset(A_NORMAL); } /* nv_ncurses_set_header() */ /* * nv_ncurses_set_footer() - write the left and right text to the * footer; note that this function does not call refresh() */ static void nv_ncurses_set_footer(DataStruct *d, const char *left, const char *right) { int x, y; char *tmp0, *tmp1; tmp0 = strdup(left); tmp1 = strdup(right); if (d->footer_left) free(d->footer_left); if (d->footer_right) free(d->footer_right); d->footer_left = tmp0; d->footer_right = tmp1; attrset(d->footer->attr); nv_ncurses_clear_region(d->footer); if (d->footer_left) { y = 0; x = 1; mvaddstr(d->footer->y + y, d->footer->x + x, d->footer_left); } if (d->footer_right) { y = 0; x = d->footer->w - strlen(d->footer_right) - 1; mvaddstr(d->footer->y + y, d->footer->x + x, d->footer_right); } attrset(A_NORMAL); } /* nv_ncurses_set_footer() */ /****************************************************************************/ /* * internal helper functions for manipulating RegionStructs */ /* * nv_ncurses_create_region() - create a new region at the specified * location with the specified dimensions; note that this function * does not call refresh() */ static RegionStruct *nv_ncurses_create_region(DataStruct *d, int x, int y, int w, int h, int color, int no_color_attr) { RegionStruct *region = (RegionStruct *) malloc(sizeof(RegionStruct)); region->x = x; region->y = y; region->w = w; region->h = h; if (d->use_color) region->attr = color; else region->attr = no_color_attr; /* create a single line for use in clearing the region */ region->line = (char *) malloc(w + 1); memset(region->line, ' ', w); region->line[w] = '\0'; /* clear the region */ attrset(region->attr); nv_ncurses_clear_region(region); attrset(A_NORMAL); return region; } /* nv_ncurses_create_region() */ /* * nv_ncurses_clear_region() - clear each line in the region; note * that this function does not call refresh(), nor does it explicitly * set any attributes. */ static void nv_ncurses_clear_region(RegionStruct *region) { int i; for (i = region->y; i < (region->y + region->h); i++) { mvaddstr(i, region->x, region->line); } } /* nv_ncurses_clear_region() */ /* * nv_ncurses_destroy_region() - clear and free the RegionStruct; note * that this function does not call refresh() */ static void nv_ncurses_destroy_region(RegionStruct *region) { if (!region) return; attrset(A_NORMAL); nv_ncurses_clear_region(region); free(region->line); free(region); } /* nv_ncurses_destroy_region() */ /****************************************************************************/ /* * internal helper functions for drawing buttons */ /* * nv_ncurses_draw_button() - draw a button on the specified region, * at location x,y with dimensions w,h. Give the button the label * str. * * The hilite parameter, when TRUE, causes the label to be printed in * reverse colors. * * The down parameter, when TRUE, causes the button to be drawn as if * it had been pressed down (ie: shifted down and right). */ static void nv_ncurses_draw_button(DataStruct *d, RegionStruct *region, int x, int y, int w, int h, char *str, bool hilite, bool down) { int i, j, n, attr = 0; if (down) x++, y++; n = strlen(str); n = (n > w) ? 0 : ((w - n) / 2); if (d->use_color) { attr = NV_NCURSES_BUTTON_COLOR; } else if (hilite) { attr = A_REVERSE; } else { attr = 0; } for (j = y; j < (y + h); j++) { for (i = x; i < (x + w); i++) { mvaddch(region->y + j, region->x + i, ' ' | attr); } } if (hilite) attr |= A_REVERSE; attron(attr); mvaddstr(region->y + y + h/2, region->x + x + n, str); attroff(attr); } /* nv_ncurses_draw_button() */ /* * nv_ncurses_erase_button() - erase the button on the specified * region at location x,y with dimensions w,h. */ static void nv_ncurses_erase_button(RegionStruct *region, int x, int y, int w, int h) { int i, j; for (j = y; j <= (y + h); j++) { for (i = x; i <= (x + w); i++) { mvaddch(region->y + j, region->x + i, ' ' | region->attr); } } } /* nv_ncurses_erase_button() */ /*****************************************************************************/ /* * nv_ncurses_do_message_region(), * nv_ncurses_do_progress_bar_region(), * nv_ncurses_do_progress_bar_message() - helper functions for drawing * regions and stuff. */ /* * nv_ncurses_do_message_region() - create a new message region * containing the string msg. The "top" argument indicates whether * the region should be vertically positioned immediately below the * header, or should be positioned 1/3 of the way down the screen. * The num_extra_lines argument is used to request extra lines in the * message region below the string (to leave room for buttons, for * example). */ static void nv_ncurses_do_message_region(DataStruct *d, const char *prefix, const char *msg, int top, int num_extra_lines) { int w, h, x, y; TextRows *t; /* * compute the width and height that we need (taking into account * num_extra_lines that the caller may need for buttons */ w = d->width - 2; t = d->format_text_rows(prefix, msg, w - 2, TRUE); h = t->n + num_extra_lines + 2; /* * compute the starting position of the message region: either * immediately below the header or 1/3 of the way down the screen. */ x = 1; if (top) y = 2; else y = ((d->height - (3 + h)) / 3) + 1; /* create the message region */ d->message = nv_ncurses_create_region(d, x, y, w, h, NV_NCURSES_MESSAGE_COLOR, NV_NCURSES_MESSAGE_NO_COLOR); nv_ncurses_format_print(d, d->message, 1, 1, d->message->w - 2, d->message->h - (1 + num_extra_lines), t); /* free the text rows */ nv_ncurses_free_text_rows(t); } /* nv_ncurses_do_message_region() */ /* * nv_ncurses_do_progress_bar_region() - create a message region, draw * the progress bar's title, separator, and the empty progress bar. */ static void nv_ncurses_do_progress_bar_region(DataStruct *d) { int n, h, i, p[4]; char v[4]; /* create the message region and print the title in it */ nv_ncurses_do_message_region(d, NULL, d->progress_title, FALSE, 3); n = d->message->w - 2; h = d->message->h; attrset(d->message->attr); /* draw the horizontal separator */ for (i = 1; i <= n; i++) { mvaddch(d->message->y + h - 4, d->message->x + i, NV_NCURSES_HLINE | d->message->attr); } /* draw an empty progress bar */ init_position(p, n + 2); init_percentage_string(v, 0); v[2] = '0'; if (d->use_color) { for (i = 1; i <= n; i++) { mvaddch(d->message->y + h - 2, d->message->x + i, choose_char(i, p, v, ' ') | NV_NCURSES_INPUT_COLOR); } } else { mvaddch(d->message->y + h - 2, d->message->x + 1, '['); for (i = 2; i < n; i++) mvaddch(d->message->y + h - 2, d->message->x + i, choose_char(i, p, v, '-')); mvaddch(d->message->y + h - 2, d->message->x + n, ']'); } } /* nv_ncurses_do_progress_bar_region() */ /* * nv_ncurses_do_progress_bar_message() - write the one line progress * bar message to the message region, truncating the string, if need * be. */ static void nv_ncurses_do_progress_bar_message(DataStruct *d, const char *str, int y, int w) { char *tmp; /* clear the message line */ attrset(d->message->attr); mvaddstr(d->message->y + y, d->message->x, d->message->line); /* write the message string */ if (str) { tmp = malloc(w + 1); strncpy(tmp, str, w); tmp[w] = '\0'; mvaddstr(d->message->y + y, d->message->x + 1, tmp); free(tmp); } } /* nv_ncurses_do_progress_bar_message() */ /***************************************************************************/ /* * pager functions */ /* * pager functions -- these functions provide the basic behavior of a * text viewer... used to display TextRows. * * d : DataStruct struct * x : starting x coordinate of the pager * y : starting y coordinate of the pager * w : width of the pager * h : height of the pager * t : TextRows to be displayed * label : string to be displayed in the status bar * cur : initial current line of the pager */ static PagerStruct *nv_ncurses_create_pager(DataStruct *d, int x, int y, int w, int h, TextRows *t, const char *label, int cur) { PagerStruct *p = (PagerStruct *) malloc(sizeof(PagerStruct)); p->t = t; p->region = nv_ncurses_create_region(d, x, y, w, h, A_NORMAL, A_NORMAL); p->label = label; p->cur = cur; p->page = h - 2; nv_ncurses_pager_update(d, p); return p; } /* nv_ncurses_create_pager() */ /* * nv_ncurses_destroy_pager() - free resources associated with the * pager */ static void nv_ncurses_destroy_pager(PagerStruct *p) { nv_ncurses_destroy_region(p->region); free(p); } /* nv_ncurses_destroy_pager () */ /* * nv_ncurses_pager_update() - redraw the text in the pager, and * update the information about the pager in the footer. Note that * this function does not call refresh(). */ static void nv_ncurses_pager_update(DataStruct *d, PagerStruct *p) { int i, maxy, percent, denom; char tmp[10]; if (!p) return; /* determine the maximum y value for the text */ maxy = (p->cur + (p->region->h - 1)); if (maxy > p->t->n) maxy = p->t->n; /* draw the text */ attrset(p->region->attr); for (i = p->cur; i < maxy; i++) { mvaddstr(p->region->y + i - p->cur, p->region->x, p->region->line); if (p->t->t[i]) { mvaddstr(p->region->y + i - p->cur, p->region->x, p->t->t[i]); } } /* compute the percentage */ denom = p->t->n - (p->region->h - 1); if (denom < 1) percent = 100; else percent = ((100.0 * (float) (p->cur)) / (float) denom); /* create the percentage string */ if (p->t->n <= (p->region->h - 1)) snprintf(tmp, 10, "All"); else if (percent <= 0) snprintf(tmp, 10, "Top"); else if (percent >= 100) snprintf(tmp, 10, "Bot"); else snprintf(tmp, 10, "%3d%%", percent); /* update the status in the footer */ nv_ncurses_set_footer(d, p->label, tmp); } /* nv_ncurses_pager_update() */ /* * nv_ncurses_pager_handle_events() - process any keys that affect the * pager. */ static void nv_ncurses_pager_handle_events(DataStruct *d, PagerStruct *p, int ch) { int n; if (!p) return; n = p->t->n - (p->region->h - 1); switch (ch) { case KEY_UP: if (p->cur > 0) { p->cur--; nv_ncurses_pager_update(d, p); refresh(); } break; case KEY_DOWN: if (p->cur < n) { p->cur++; nv_ncurses_pager_update(d, p); refresh(); } break; case KEY_PPAGE: if (p->cur > 0) { p->cur -= p->page; if (p->cur < 0) p->cur = 0; nv_ncurses_pager_update(d, p); refresh(); } break; case KEY_NPAGE: if (p->cur < n) { p->cur += p->page; if (p->cur > n) p->cur = n; nv_ncurses_pager_update(d, p); refresh(); } break; } } /* nv_ncurses_pager_handle_events() */ /*****************************************************************************/ /* * helper functions for the progress bar */ static int choose_char(int i, int p[4], char v[4], char def) { if (p[0] == i) return v[0] ? v[0] : def; if (p[1] == i) return v[1] ? v[1] : def; if (p[2] == i) return v[2] ? v[2] : def; if (p[3] == i) return v[3] ? v[3] : def; return def; } static void init_percentage_string(char v[4], int n) { int j; n = NV_MAX(n, 1); v[0] = (n/100); v[1] = (n/10) - (v[0]*10); v[2] = (n - (v[0]*100) - (v[1]*10)); v[0] += '0'; v[1] += '0'; v[2] += '0'; v[3] = '%'; for (j = 0; j < 3; j++) { if (v[j] == '0') v[j] = 0; else break; } } static void init_position(int p[4], int w) { p[0] = 0 + (w - 4)/2; p[1] = 1 + (w - 4)/2; p[2] = 2 + (w - 4)/2; p[3] = 3 + (w - 4)/2; } /*****************************************************************************/ /* * misc helper functions */ /* * nv_ncurses_create_command_list_textrows() - build TextRows to * describe the command list */ static TextRows *nv_ncurses_create_command_list_textrows(DataStruct *d, CommandList *cl, int w) { int i, len; Command *c; char *str, *perms; TextRows *t0, *t1; t0 = t1 = NULL; for (i = 0; i < cl->num; i++) { c = &cl->cmds[i]; str = NULL; switch (c->cmd) { case INSTALL_CMD: perms = nv_ncurses_mode_to_permission_string(c->mode); len = strlen(c->s0) + strlen(c->s1) + strlen(perms) + 64; if (c->s2) { len += strlen(c->s2) + 64; } str = (char *) malloc(len + 1); snprintf(str, len, "Install the file '%s' as '%s' with " "permissions '%s'", c->s0, c->s1, perms); free(perms); if (c->s2) { len = strlen(c->s2) + 64; snprintf(str + strlen(str), len, " then execute the command `%s`", c->s2); } break; case RUN_CMD: len = strlen(c->s0) + 64; str = (char *) malloc(len + 1); snprintf(str, len, "Execute the command `%s`", c->s0); break; case SYMLINK_CMD: len = strlen(c->s0) + strlen(c->s1) + 64; str = (char *) malloc(len + 1); snprintf(str, len, "Create a symbolic link '%s' to '%s'", c->s0, c->s1); break; case BACKUP_CMD: len = strlen(c->s0) + 64; str = (char *) malloc(len + 1); snprintf(str, len, "Backup the file '%s'", c->s0); break; case DELETE_CMD: len = strlen(c->s0) + 64; str = (char *) malloc(len + 1); snprintf(str, len, "Delete the file '%s'", c->s0); break; default: /* XXX should not get here */ break; } if (str) { t1 = d->format_text_rows(NV_BULLET_STR, str, w, TRUE); if (t0) { nv_ncurses_concat_text_rows(t0, t1); nv_ncurses_free_text_rows(t1); } else { t0 = t1; } t1 = NULL; free(str); } } return t0; } /* nv_ncurses_create_command_list_textrows() */ /* * mode_to_permission_string() - given a mode bitmask, allocate and * write a permission string. */ static char *nv_ncurses_mode_to_permission_string(mode_t mode) { char *s = (char *) malloc(10); memset (s, '-', 9); if (mode & (1 << 8)) s[0] = 'r'; if (mode & (1 << 7)) s[1] = 'w'; if (mode & (1 << 6)) s[2] = 'x'; if (mode & (1 << 5)) s[3] = 'r'; if (mode & (1 << 4)) s[4] = 'w'; if (mode & (1 << 3)) s[5] = 'x'; if (mode & (1 << 2)) s[6] = 'r'; if (mode & (1 << 1)) s[7] = 'w'; if (mode & (1 << 0)) s[8] = 'x'; s[9] = '\0'; return s; } /* mode_to_permission_string() */ /* * nv_ncurses_concat_text_rows() - concatenate two text rows */ static void nv_ncurses_concat_text_rows(TextRows *t0, TextRows *t1) { int n, i; n = t0->n + t1->n; t0->t = (char **) realloc(t0->t, sizeof(char *) * n); for (i = 0; i < t1->n; i++) { t0->t[i + t0->n] = strdup(t1->t[i]); } t0->m = NV_MAX(t0->m, t1->m); t0->n = n; } /* nv_ncurses_concat_text_rows() */ /* * nv_free_text_rows() - free the TextRows data structure allocated by * nv_format_text_rows() */ static void nv_ncurses_free_text_rows(TextRows *t) { int i; if (!t) return; for (i = 0; i < t->n; i++) free(t->t[i]); if (t->t) free(t->t); free(t); } /* nv_free_text_rows() */ /* * nv_ncurses_formatted_printw() - this function formats the string * str on the region region, wrapping to the next line as necessary, * using the bounding box specified by x, y, w, and h. * * The number of lines printed are returned. */ static int nv_ncurses_format_print(DataStruct *d, RegionStruct *region, int x, int y, int w, int h, TextRows *t) { int i, n; n = NV_MIN(t->n, h); attrset(region->attr); for (i = 0; i < n; i++) { mvaddstr(region->y + y + i, region->x + x, t->t[i]); } attrset(A_NORMAL); return n; } /* nv_ncurses_format_printw() */ /* * nv_ncurses_check_resize() - check if the dimensions of the screen * have changed; if so, update the old header and footer regions, * clear everything, update our cached dimensions, and recreate the * header and footer. * * XXX we could catch the SIGWINCH (window resize) signal, but that's * asynchronous... it's safer to only attempt to handle a resize when * we know we can. */ static int nv_ncurses_check_resize(DataStruct *d, bool force) { int x, y; getmaxyx(stdscr, y, x); if (!force) { if ((x == d->width) && (y == d->height)) { /* no resize detected... just return */ return FALSE; } } /* we have been resized */ /* destroy the old header and footer */ nv_ncurses_destroy_region(d->header); nv_ncurses_destroy_region(d->footer); clear(); /* update our cached copy of the dimensions */ d->height = y; d->width = x; /* recreate the header and footer */ d->header = nv_ncurses_create_region(d, 1, 0, d->width - 2, 1, NV_NCURSES_HEADER_COLOR, NV_NCURSES_HEADER_NO_COLOR); d->footer = nv_ncurses_create_region(d, 1, d->height - 2, d->width - 2, 1, NV_NCURSES_FOOTER_COLOR, NV_NCURSES_FOOTER_NO_COLOR); nv_ncurses_set_header(d, d->title); nv_ncurses_set_footer(d, d->footer_left, d->footer_right); return TRUE; } /* nv_ncurses_check_resize() */