Obtain name of XBoard's man file from external command

[xboard.git] / dialogs.c

diff --git a/dialogs.c b/dialogs.c
index 50f40b1..191061c 100644 (file)
--- a/dialogs.c
+++ b/dialogs.c
@@ -66,6 +66,7 @@ extern char *getenv();
 
 int values[MAX_OPTIONS];
 ChessProgramState *currentCps;
+char dataDir[MSG_SIZ] = DATADIR, manDir[MSG_SIZ] = MANDIR;
 
 //----------------------------Generic dialog --------------------------------------------
 
@@ -1259,7 +1260,7 @@ NewTagsPopup (char *text, char *msg, char *ttl)
     if(tagsText) free(tagsText); tagsText = strdup(text);
     tagsOptions[0].name = msg;
     MarkMenu("View.Tags", TagsDlg);
-    GenericPopUp(tagsOptions, title, TagsDlg, BoardWindow, NONMODAL, appData.topLevel);
+    GenericPopUp(tagsOptions + (msg == NULL), title, TagsDlg, BoardWindow, NONMODAL, appData.topLevel);
 }
 
 void
@@ -2296,7 +2297,7 @@ ErrorPopDown ()
     if (errorExitStatus != -1) ExitEvent(errorExitStatus);
 }
 
-static int
+int
 ErrorOK (int n)
 {
     dialogError = errorUp = False;
@@ -2458,16 +2459,17 @@ ReadLine (FILE *f)
 void
 GetHelpText (FILE *f, char *name)
 {
-    char *line, buf[MSG_SIZ], text[10000], *p = text, *q = text;
+    char *line, buf[MSG_SIZ], title[MSG_SIZ], text[10000], *p = text, *q = text;
     int len, cnt = 0;
     snprintf(buf, MSG_SIZ, ".B %s", name);
     len = strlen(buf);
     for(len=1; buf[len] == ' ' || buf[len] == '-' || isalpha(buf[len]) || isdigit(buf[len]); len++);
     buf[len] = NULLCHAR;
     while(buf[--len] == ' ') buf[len] = NULLCHAR;
+    snprintf(title, MSG_SIZ, "Help on '%s'", buf+3);
     while((line = ReadLine(f))) {
-       if(!strncmp(line, buf, len) && (strncmp(line, ".SS ", 4) || strncmp(line+4, buf+3, len-3))) {
-           while((line = ReadLine(f)) && (cnt == 0 || strncmp(line, ".B ", 3))) {
+       if(!strncmp(line, buf, len) || !strncmp(line, ".SS ", 4) && !strncmp(line+4, buf+3, len-3)) {
+           while((line = ReadLine(f)) && (cnt == 0 || strncmp(line, ".B ", 3) && strncmp(line, ".SS ", 4))) {
                if(!*line) { *p++ = '\n'; *p++ = '\n'; q = p; continue; }
                if(*line == '.') continue;
                *p++ = ' '; cnt++;
@@ -2479,7 +2481,7 @@ GetHelpText (FILE *f, char *name)
                if(p - text > 9900) break;
            }
            *p = NULLCHAR;
-           ErrorPopUp("Help", text, FALSE);
+           ErrorPopUp(title, text, FALSE);
            return;
        }
     }
@@ -2490,8 +2492,22 @@ GetHelpText (FILE *f, char *name)
 void
 DisplayHelp (char *name)
 {
-    char *manFile = DATADIR "/../../man/man6/xboard.6";
-    FILE *f = fopen(manFile, "r");
+    static char *xboardMan;
+    char buf[MSG_SIZ], tidy[MSG_SIZ];
+    FILE *f;
+    if(!xboardMan) {
+       xboardMan = BufferCommandOutput("man -w xboard", MSG_SIZ); // obtain path to XBoard's man file
+       if(xboardMan) xboardMan[strlen(xboardMan)-1] = NULLCHAR;   // strip off traling linefeed
+    }
+    if(currentCps) {
+       TidyProgramName(currentCps == &first ? appData.firstChessProgram : appData.secondChessProgram, "localhost", tidy);
+       snprintf(buf, MSG_SIZ, "/usr/local/share/man/man6/%s.6", tidy);
+    } else snprintf(buf, MSG_SIZ, "%s", xboardMan);
+    f = fopen(buf, "r");
+    if(!f && currentCps) { // engine manual could be in two places
+       snprintf(buf, MSG_SIZ, "/usr/share/man/man6/%s.6", tidy);
+       f = fopen(buf, "r");
+    }
     if(f) {
        GetHelpText(f, name);
        fclose(f);