2 * winhelp.c: centralised functions to launch Windows help files,
3 * and to decide whether to use .HLP or .CHM help in any given
16 typedef HWND (CALLBACK *htmlhelp_t)(HWND, LPCSTR, UINT, DWORD);
18 static char *help_path, *chm_path;
19 static int help_has_contents;
20 static int requested_help;
21 static DWORD html_help_cookie;
22 static htmlhelp_t htmlhelp;
26 char b[2048], *p, *q, *r;
29 GetModuleFileName(NULL, b, sizeof(b) - 1);
32 if (p && p >= r) r = p+1;
34 if (q && q >= r) r = q+1;
35 strcpy(r, PUTTY_HELP_FILE);
36 if ( (fp = fopen(b, "r")) != NULL) {
37 help_path = dupstr(b);
41 strcpy(r, PUTTY_HELP_CONTENTS);
42 if ( (fp = fopen(b, "r")) != NULL) {
43 help_has_contents = TRUE;
46 help_has_contents = FALSE;
48 strcpy(r, PUTTY_CHM_FILE);
49 if ( (fp = fopen(b, "r")) != NULL) {
55 HINSTANCE dllHH = LoadLibrary("hhctrl.ocx");
57 htmlhelp = (htmlhelp_t)GetProcAddress(dllHH, "HtmlHelpA");
62 htmlhelp(NULL, NULL, HH_INITIALIZE, (DWORD)&html_help_cookie);
68 void shutdown_help(void)
71 htmlhelp(NULL, NULL, HH_UNINITIALIZE, html_help_cookie);
77 * FIXME: it would be nice here to disregard help_path on
78 * platforms that didn't have WINHLP32. But that's probably
79 * unrealistic, since even Vista will have it if the user
80 * specifically downloads it.
82 return (help_path || chm_path);
85 void launch_help(HWND hwnd, const char *topic)
88 int colonpos = strcspn(topic, ":");
92 assert(topic[colonpos] != '\0');
93 fname = dupprintf("%s::/%s.html>main", chm_path,
94 topic + colonpos + 1);
95 htmlhelp(hwnd, fname, HH_DISPLAY_TOPIC, 0);
97 } else if (help_path) {
98 char *cmd = dupprintf("JI(`',`%.*s')", colonpos, topic);
99 WinHelp(hwnd, help_path, HELP_COMMAND, (DWORD)cmd);
104 htmlhelp(hwnd, chm_path, HH_DISPLAY_TOPIC, 0);
105 } else if (help_path) {
106 WinHelp(hwnd, help_path,
107 help_has_contents ? HELP_FINDER : HELP_CONTENTS, 0);
110 requested_help = TRUE;
113 void quit_help(HWND hwnd)
115 if (requested_help) {
117 htmlhelp(NULL, NULL, HH_CLOSE_ALL, 0);
118 } else if (help_path) {
119 WinHelp(hwnd, help_path, HELP_QUIT, 0);
121 requested_help = FALSE;