ncurses 5.6 - patch 20070310

[ncurses.git] / test / cardfile.c

diff --git a/test/cardfile.c b/test/cardfile.c
index 08d33ed43cc0d8014e4a8f3a894215e8e95f943f..2985b2ed8f261718bc9fb83a29c8c4e35b913d52 100644 (file)
--- a/test/cardfile.c
+++ b/test/cardfile.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1999-2002,2003 Free Software Foundation, Inc.              *
+ * Copyright (c) 1999-2006,2007 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            *
@@ -27,9 +27,9 @@
  ****************************************************************************/
 
 /*
- * Author: Thomas E. Dickey <dickey@clark.net> 1999
+ * Author: Thomas E. Dickey
  *
- * $Id: cardfile.c,v 1.23 2003/04/26 16:43:56 tom Exp $
+ * $Id: cardfile.c,v 1.29 2007/03/10 19:16:45 tom Exp $
  *
  * File format: text beginning in column 1 is a title; other text is content.
  */
@@ -43,6 +43,10 @@
 
 #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
@@ -61,6 +65,7 @@ typedef struct _card {
 } CARD;
 
 static CARD *all_cards;
+static bool try_color = FALSE;
 static char default_name[] = "cardfile.dat";
 
 #if !HAVE_STRDUP
@@ -238,7 +243,8 @@ order_cards(CARD * first, int depth)
     if (first) {
        if (depth && first->link)
            order_cards(first->link, depth - 1);
-       top_panel(first->panel);
+       if (isVisible(first))
+           top_panel(first->panel);
     }
 }
 
@@ -248,8 +254,13 @@ order_cards(CARD * first, int depth)
 static CARD *
 next_card(CARD * now)
 {
-    if (now->link)
-       now = now->link;
+    if (now->link != 0) {
+       CARD *tst = now->link;
+       if (isVisible(tst))
+           now = tst;
+       else
+           tst = next_card(tst);
+    }
     return now;
 }
 
@@ -260,9 +271,24 @@ static CARD *
 prev_card(CARD * now)
 {
     CARD *p;
-    for (p = all_cards; p != 0; p = p->link)
-       if (p->link == now)
+    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;
 }
 
@@ -280,8 +306,8 @@ form_virtualize(WINDOW *w)
        return (MY_CTRL_N);
     case CTRL('P'):
        return (MY_CTRL_P);
-    case CTRL('Q'):
-    case 033:
+    case QUIT:
+    case ESCAPE:
        return (MY_CTRL_Q);
 
     case KEY_BACKSPACE:
@@ -355,23 +381,37 @@ cardfile(char *fname)
     WINDOW *win;
     CARD *p;
     CARD *top_card;
-    int visible_cards = count_cards();
-    int panel_wide = COLS - (visible_cards * OFFSET_CARD);
-    int panel_high = LINES - (visible_cards * OFFSET_CARD) - 5;
-    int form_wide = panel_wide - 2;
-    int form_high = panel_high - 2;
-    int y = (visible_cards - 1) * OFFSET_CARD;
-    int x = 0;
+    int visible_cards;
+    int panel_wide;
+    int panel_high;
+    int form_wide;
+    int form_high;
+    int y;
+    int x;
     int ch = ERR;
-    int last_ch;
     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) {
 
-       win = newwin(panel_high, panel_wide, y, x);
+       if ((win = newwin(panel_high, panel_wide, y, x)) == 0)
+           break;
+
+       wbkgd(win, COLOR_PAIR(pair_2));
        keypad(win, TRUE);
        p->panel = new_panel(win);
        box(win, 0, 0);
@@ -385,13 +425,13 @@ cardfile(char *fname)
        x += OFFSET_CARD;
     }
 
-    order_cards(top_card = all_cards, visible_cards);
+    top_card = first_card(all_cards);
+    order_cards(top_card, visible_cards);
 
     while (!finished) {
        update_panels();
        doupdate();
 
-       last_ch = ch;
        ch = form_virtualize(panel_window(top_card->panel));
        switch (form_driver(top_card->form, ch)) {
        case E_OK:
@@ -432,6 +472,8 @@ cardfile(char *fname)
                    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
@@ -483,15 +525,17 @@ cardfile(char *fname)
        p = all_cards;
        all_cards = all_cards->link;
 
-       f = form_fields(p->form);
-       count = field_count(p->form);
+       if (isVisible(p)) {
+           f = form_fields(p->form);
+           count = field_count(p->form);
 
-       unpost_form(p->form);   /* ...so we can free it */
-       free_form(p->form);     /* this also disconnects the fields */
+           unpost_form(p->form);       /* ...so we can free it */
+           free_form(p->form); /* this also disconnects the fields */
 
-       free_form_fields(f);
+           free_form_fields(f);
 
-       del_panel(p->panel);
+           del_panel(p->panel);
+       }
        free(p->title);
        free(p->content);
        free(p);
@@ -499,6 +543,22 @@ cardfile(char *fname)
 #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
@@ -508,11 +568,32 @@ main(int argc, char *argv[])
 
     setlocale(LC_ALL, "");
 
+    while ((n = getopt(argc, argv, "c")) != EOF) {
+       switch (n) {
+       case 'c':
+           try_color = TRUE;
+           break;
+       default:
+           usage();
+       }
+    }
+
     initscr();
     cbreak();
     noecho();
 
-    if (argc > 1) {
+    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(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)