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/**************************************************************************** * Copyright (c) 1999-2010,2012 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ***************************************************************************/ / * Author: Thomas E. Dickey * * $Id: cardfile.c,v 1.41 2012/11/03 19:26:50 tom Exp $ * * File format: text beginning in column 1 is a title; other text is content. / #include <test.priv.h> #if USE_LIBFORM && USE_LIBPANEL #include <form.h> #include <panel.h> #define VISIBLE_CARDS 10 #define OFFSET_CARD 2 #define pair_1 1 #define pair_2 2 #define isVisible(cardp) ((cardp)->panel != 0) enum { MY_CTRL_x = MAX_FORM_COMMAND ,MY_CTRL_N ,MY_CTRL_P ,MY_CTRL_Q ,MY_CTRL_W }; typedef struct _card { struct _card link; PANEL panel; FORM form; char title; char content; } CARD; static CARD all_cards; static bool try_color = FALSE; static char default_name[] = "cardfile.dat"; static void failed(const char s) { perror(s); endwin(); ExitProgram(EXIT_FAILURE); } static const char * skip(const char buffer) { while (isspace(UChar(buffer))) buffer++; return buffer; } static void trim(char buffer) { size_t n = strlen(buffer); while (n-- && isspace(UChar(buffer[n]))) buffer[n] = 0; } /*****************************************************************************/ static CARD add_title(const char title) { CARD card, p, q; for (p = all_cards, q = 0; p != 0; q = p, p = p->link) { int cmp = strcmp(p->title, title); if (cmp == 0) return p; if (cmp > 0) break; } card = typeCalloc(CARD, 1); card->title = strdup(title); card->content = strdup(""); if (q == 0) { card->link = all_cards; all_cards = card; } else { card->link = q->link; q->link = card; } return card; } static void add_content(CARD * card, const char content) { size_t total, offset; content = skip(content); if ((total = strlen(content)) != 0) { if (card->content != 0 && (offset = strlen(card->content)) != 0) { total += 1 + offset; card->content = typeRealloc(char, total + 1, card->content); if (card->content) strcpy(card->content + offset++, " "); } else { offset = 0; if (card->content != 0) free(card->content); card->content = typeMalloc(char, total + 1); } if (card->content) strcpy(card->content + offset, content); else failed("add_content"); } } static CARD new_card(void) { CARD card = add_title(""); add_content(card, ""); return card; } static CARD find_card(char title) { CARD card; for (card = all_cards; card != 0; card = card->link) if (!strcmp(card->title, title)) break; return card; } static void read_data(char fname) { FILE fp; CARD card = 0; char buffer[BUFSIZ]; if ((fp = fopen(fname, "r")) != 0) { while (fgets(buffer, sizeof(buffer), fp)) { trim(buffer); if (isspace(UChar(buffer))) { if (card == 0) card = add_title(""); add_content(card, buffer); } else if ((card = find_card(buffer)) == 0) { card = add_title(buffer); } } fclose(fp); } } /******************************************************************************/ static void write_data(const char fname) { FILE fp; CARD p = 0; int n; if (!strcmp(fname, default_name)) fname = "cardfile.out"; if ((fp = fopen(fname, "w")) != 0) { for (p = all_cards; p != 0; p = p->link) { FIELD *f = form_fields(p->form); for (n = 0; f[n] != 0; n++) { char s = field_buffer(f[n], 0); if (s != 0 && (s = strdup(s)) != 0) { trim(s); fprintf(fp, "%s%s\n", n ? "\t" : "", s); free(s); } } } fclose(fp); } } /******************************************************************************/ / * Count the cards / static int count_cards(void) { CARD p; int count = 0; for (p = all_cards; p != 0; p = p->link) count++; return count; } /* * Shuffle the panels to keep them in a natural hierarchy. / static void order_cards(CARD first, int depth) { if (first) { if (depth && first->link) order_cards(first->link, depth - 1); if (isVisible(first)) top_panel(first->panel); } } /* * Return the next card in the list / static CARD next_card(CARD * now) { if (now->link != 0) { CARD tst = now->link; if (isVisible(tst)) now = tst; else (void) next_card(tst); } return now; } / * Return the previous card in the list / static CARD prev_card(CARD * now) { CARD p; for (p = all_cards; p != 0; p = p->link) { if (p->link == now) { if (!isVisible(p)) p = prev_card(p); return p; } } return now; } / * Returns the first card in the list that we will display. / static CARD first_card(CARD * now) { if (!isVisible(now)) now = next_card(now); return now; } /******************************************************************************/ static int form_virtualize(WINDOW w) { int c = wgetch(w); switch (c) { case CTRL('W'): return (MY_CTRL_W); case CTRL('N'): return (MY_CTRL_N); case CTRL('P'): return (MY_CTRL_P); case QUIT: case ESCAPE: return (MY_CTRL_Q); case KEY_BACKSPACE: return (REQ_DEL_PREV); case KEY_DC: return (REQ_DEL_CHAR); case KEY_LEFT: return (REQ_LEFT_CHAR); case KEY_RIGHT: return (REQ_RIGHT_CHAR); case KEY_DOWN: case KEY_NEXT: return (REQ_NEXT_FIELD); case KEY_UP: case KEY_PREVIOUS: return (REQ_PREV_FIELD); default: return (c); } } static FIELD ** make_fields(CARD * p, int form_high, int form_wide) { FIELD *f = typeCalloc(FIELD , 3); f[0] = new_field(1, form_wide, 0, 0, 0, 0); set_field_back(f[0], A_REVERSE); set_field_buffer(f[0], 0, p->title); field_opts_off(f[0], O_BLANK); f[1] = new_field(form_high - 1, form_wide, 1, 0, 0, 0); set_field_buffer(f[1], 0, p->content); set_field_just(f[1], JUSTIFY_LEFT); field_opts_off(f[1], O_BLANK); f[2] = 0; return f; } static void show_legend(void) { erase(); move(LINES - 3, 0); addstr("^Q/ESC -- exit form ^W -- writes data to file\n"); addstr("^N -- go to next card ^P -- go to previous card\n"); addstr("Arrow keys move left/right within a field, up/down between fields"); } #if (defined(KEY_RESIZE) && HAVE_WRESIZE) \|\| NO_LEAKS static void free_form_fields(FIELD f) { int n; for (n = 0; f[n] != 0; ++n) { free_field(f[n]); } free(f); } #endif /****************************************************************************/ static void cardfile(char fname) { WINDOW win; CARD p; CARD top_card; int visible_cards; int panel_wide; int panel_high; int form_wide; int form_high; int y; int x; int ch = ERR; int finished = FALSE; show_legend(); / decide how many cards we can display / visible_cards = count_cards(); while ( (panel_wide = COLS - (visible_cards OFFSET_CARD)) < 10 \|\| (panel_high = LINES - (visible_cards * OFFSET_CARD) - 5) < 5) { --visible_cards; } form_wide = panel_wide - 2; form_high = panel_high - 2; y = (visible_cards - 1) * OFFSET_CARD; x = 0; /* make a panel for each CARD / for (p = all_cards; p != 0; p = p->link) { if ((win = newwin(panel_high, panel_wide, y, x)) == 0) break; wbkgd(win, (chtype) COLOR_PAIR(pair_2)); keypad(win, TRUE); p->panel = new_panel(win); box(win, 0, 0); p->form = new_form(make_fields(p, form_high, form_wide)); set_form_win(p->form, win); set_form_sub(p->form, derwin(win, form_high, form_wide, 1, 1)); post_form(p->form); y -= OFFSET_CARD; x += OFFSET_CARD; } top_card = first_card(all_cards); order_cards(top_card, visible_cards); while (!finished) { update_panels(); doupdate(); ch = form_virtualize(panel_window(top_card->panel)); switch (form_driver(top_card->form, ch)) { case E_OK: break; case E_UNKNOWN_COMMAND: switch (ch) { case MY_CTRL_Q: finished = TRUE; break; case MY_CTRL_P: top_card = prev_card(top_card); order_cards(top_card, visible_cards); break; case MY_CTRL_N: top_card = next_card(top_card); order_cards(top_card, visible_cards); break; case MY_CTRL_W: form_driver(top_card->form, REQ_VALIDATION); write_data(fname); break; #if defined(KEY_RESIZE) && HAVE_WRESIZE case KEY_RESIZE: / resizeterm already did "something" reasonable, but it cannot * know much about layout. So let's make it nicer. / panel_wide = COLS - (visible_cards OFFSET_CARD); panel_high = LINES - (visible_cards * OFFSET_CARD) - 5; form_wide = panel_wide - 2; form_high = panel_high - 2; y = (visible_cards - 1) * OFFSET_CARD; x = 0; show_legend(); for (p = all_cards; p != 0; p = p->link) { FIELD *oldf = form_fields(p->form); WINDOW olds = form_sub(p->form); if (!isVisible(p)) continue; win = form_win(p->form); /* move and resize the card as needed * FIXME: if the windows are shrunk too much, this won't do / mvwin(win, y, x); wresize(win, panel_high, panel_wide); / reconstruct each form. Forms are not resizable, and * there appears to be no good way to reload the text in * a resized window. / werase(win); unpost_form(p->form); free_form(p->form); p->form = new_form(make_fields(p, form_high, form_wide)); set_form_win(p->form, win); set_form_sub(p->form, derwin(win, form_high, form_wide, 1, 1)); post_form(p->form); free_form_fields(oldf); delwin(olds); box(win, 0, 0); y -= OFFSET_CARD; x += OFFSET_CARD; } break; #endif default: beep(); break; } break; default: flash(); break; } } #if NO_LEAKS while (all_cards != 0) { FIELD f; p = all_cards; all_cards = all_cards->link; if (isVisible(p)) { f = form_fields(p->form); unpost_form(p->form); / ...so we can free it / free_form(p->form); / this also disconnects the fields / free_form_fields(f); del_panel(p->panel); } free(p->title); free(p->content); free(p); } #endif } static void usage(void) { static const char msg[] = { "Usage: view [options] file" ,"" ,"Options:" ," -c use color if terminal supports it" }; size_t n; for (n = 0; n < SIZEOF(msg); n++) fprintf(stderr, "%s\n", msg[n]); ExitProgram(EXIT_FAILURE); } /******************************************************************************/ int main(int argc, char argv[]) { int n; setlocale(LC_ALL, ""); while ((n = getopt(argc, argv, "c")) != -1) { switch (n) { case 'c': try_color = TRUE; break; default: usage(); } } initscr(); cbreak(); noecho(); if (try_color) { if (has_colors()) { start_color(); init_pair(pair_1, COLOR_WHITE, COLOR_BLUE); init_pair(pair_2, COLOR_WHITE, COLOR_CYAN); bkgd((chtype) COLOR_PAIR(pair_1)); } else { try_color = FALSE; } } if (optind + 1 == argc) { for (n = 1; n < argc; n++) read_data(argv[n]); if (count_cards() == 0) new_card(); cardfile(argv[1]); } else { read_data(default_name); if (count_cards() == 0) new_card(); cardfile(default_name); } endwin(); ExitProgram(EXIT_SUCCESS); } #else int main(void) { printf("This program requires the curses form and panel libraries\n"); ExitProgram(EXIT_FAILURE); } #endif

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