1: /*
2: * Copyright (c) 2004 Rinet Corp., Novosibirsk, Russia
3: *
4: * Redistribution and use in source forms, with and without modification,
5: * are permitted provided that this entire comment appears intact.
6: *
7: * THIS SOURCE CODE IS PROVIDED ``AS IS'' WITHOUT ANY WARRANTIES OF ANY KIND.
8: */
9:
10: #ifdef HAVE_CONFIG_H
11: #include <config.h>
12: #endif
13:
14: #ifdef HAVE_SLCURSES
15: #include <slcurses.h>
16: #elif HAVE_NCURSES
17: #include <ncurses.h>
18: #else
19: #include <curses.h>
20: #endif
21: #include <stdio.h>
22: #include <string.h>
23:
24: #include "trafshow.h"
25: #include "help_page.h"
26: #include "getkey.h"
27: #include "screen.h"
28: #include "selector.h"
29:
30: static ShowMode help_mode = HelpPage;
31:
32: struct help_page_entry {
33: int key;
34: const char *name;
35: const char *descr;
36: };
37:
38: static struct help_page_entry Interfaces_help[] = {
39: { 'q', " Esc", "Quit the program" },
40: { K_CR, " Enter", "Use Arrow-Keys to select Interface to show" },
41: { K_CTRL('L'), " Ctrl-L", "Refresh screen from scratch" },
42: { 'r', " R", "Set the screen refresh-period.." },
43: { 'p', " P", "Set the expired data purge-period.." },
44: { 'f', " F", "Set the filter expression (empty to reset).." },
45: { '/', " /", "To search & follow for string in the list.." },
46: { K_CTRL('_'), " Ctrl-/", "Turn off search & follow mode" },
47: { 'a', " A", "To aggregate/summarize flows totally.." },
48: { K_CTRL('R'), " Ctrl-R", "Reset all flow cache totally" },
49: { 'n', " N", "Toggle numeric values to names conversion" },
50:
51: { 0,0,0 }
52: };
53:
54: static struct help_page_entry NetStat_help[] = {
55: { 'q', " Esc", "Return to previous page" },
56: { K_CR, " Enter", "Use Arrow-Keys to select Flow for detail" },
57: { K_LEFT, " Left", "Rotate show mode left" },
58: { K_RIGHT, " Right", "Rotate show mode right" },
59: { K_TAB, " Tab", "Move cursor to backflow if any" },
60: { K_CTRL('L'), " Ctrl-L", "Refresh screen from scratch" },
61: { 'r', " R", "Set the screen refresh-period.." },
62: { 'p', " P", "Set the expired data purge-period.." },
63: { 'f', " F", "Set the filter expression (empty to reset).." },
64: { '/', " /", "To search & follow for string in the list.." },
65: { K_CTRL('_'), " Ctrl-/", "Turn off search & follow mode" },
66: { 'a', " A", "To aggregate/summarize flows in the list.." },
67: { K_CTRL('R'), " Ctrl-R", "Reset flow cache on the Interface" },
68: { 'n', " N", "Toggle numeric values to names conversion" },
69:
70: { 0,0,0 }
71: };
72:
73: ShowMode
74: help_page_mode()
75: {
76: return help_mode;
77: }
78:
79: static void
80: scale_size(name, descr)
81: int *name, *descr;
82: {
83: *name = line_factor * (double)HELP_PAGE_NAME;
84: *descr = line_factor * (double)HELP_PAGE_DESCR;
85: }
86:
87: static int
88: help_page_header(dst, size, unused)
89: char *dst;
90: int size;
91: const void *unused;
92: {
93: int name_sz, desc_sz;
94:
95: /* sanity check */
96: if (!dst || size < 1 || unused)
97: return 0;
98:
99: scale_size(&name_sz, &desc_sz);
100:
101: snprintf(dst, size,
102: "%-*.*s %-*.*s",
103: name_sz, name_sz, " KeyPress",
104: desc_sz, desc_sz, "Action");
105: return 0;
106: }
107:
108: static int
109: help_page_line(dst, size, hp, idx)
110: char *dst;
111: int size;
112: const struct help_page_entry *hp;
113: int idx;
114: {
115: int name_sz, desc_sz;
116:
117: /* sanity check */
118: if (!dst || size < 1 || !hp)
119: return 0;
120:
121: scale_size(&name_sz, &desc_sz);
122: snprintf(dst, size,
123: "%-*.*s %-*.*s",
124: name_sz, name_sz, hp[idx].name,
125: desc_sz, desc_sz, hp[idx].descr);
126: return 0;
127: }
128:
129: static int
130: help_page_footer(dst, size, topic)
131: char *dst;
132: int size;
133: const char *topic;
134: {
135: int i, len;
136: SELECTOR *sp = help_page_selector();
137:
138: /* sanity check */
139: if (!dst || size < 1 || !topic || !sp)
140: return 0;
141: i = 0;
142: len = strlen(topic);
143: if (len > 0 && len < sp->COLS) {
144: len = sp->COLS/2 - len/2;
145: while (i < len) dst[i++] = ' ';
146: }
147: (void)strncpy(dst + i, topic, size - i);
148: dst[size-1] = '\0';
149: return 0;
150: }
151:
152: SELECTOR *
153: help_page_selector()
154: {
155: static SELECTOR *sp = 0;
156: if (!sp && (sp = selector_init()) != 0) {
157: int name_sz, desc_sz;
158: scale_size(&name_sz, &desc_sz);
159:
160: sp->window_color = A_REVERSE;
161: sp->cursor_color = A_NORMAL;
162: sp->COLS = MIN(name_sz + desc_sz, COLS);
163: sp->LINES = MIN(sp->COLS/3, LINES);
164: sp->COL = COLS/2 - sp->COLS/2;
165: sp->LINE = LINES/2 - sp->LINES/2;
166: sp->get_header = help_page_header;
167: sp->get_line = help_page_line;
168: sp->get_footer = help_page_footer;
169: }
170: return sp;
171: }
172:
173: int
174: help_page_key(idx)
175: int idx;
176: {
177: int i;
178: SELECTOR *sp;
179: const struct help_page_entry *hp;
180:
181: if ((sp = help_page_selector()) == 0)
182: return -1;
183: hp = (const struct help_page_entry *)sp->list;
184: for (i = 0; hp; hp++) {
185: if (i++ == idx) break;
186: }
187: return (hp ? hp->key : -1);
188: }
189:
190: SELECTOR *
191: help_page_list(mode)
192: ShowMode mode;
193: {
194: struct help_page_entry *hp = 0;
195: char *topic = 0;
196: SELECTOR *sp;
197:
198: switch (mode) {
199: case Interfaces:
200: hp = Interfaces_help;
201: topic = "Interface selection Help";
202: break;
203: case NetStat:
204: hp = NetStat_help;
205: topic = "Network Flow selection Help";
206: break;
207: case FlowDump: /* no help available */
208: case HelpPage: /* help on help?? */
209: return 0;
210: }
211:
212: if ((sp = help_page_selector()) != 0) {
213: help_mode = mode;
214: sp->header = 0; /* unused */
215: sp->footer = topic;
216: sp->list = hp;
217: sp->items = 0;
218: for (; hp && hp->name; hp++)
219: sp->items++;
220: }
221: return sp;
222: }
223:
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