Changed WPS enum conditional functionality, displaying the last part in the list if the tag has no value. Also added enum support for battery (5 steps) and volume (10 steps).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7476 a1c6a512-1295-4272-9138-f99709370657

apps/wps-display.c

@@ -617,7 +617,10 @@ static char* get_tag(struct mp3entry* cid3,
                     return buf;
 
                 case 'c':  /* File Codec */
-                    *intval = id3->codectype;
+                    if(id3->codectype == AFMT_UNKNOWN)
+                        *intval = AFMT_NUM_CODECS;
+                    else
+                        *intval = id3->codectype;
                     return id3_get_codec(id3);
             }
             break;
@@ -697,6 +700,7 @@ static char* get_tag(struct mp3entry* cid3,
                 case 'v': /* volume */
                     *flags |= WPS_REFRESH_DYNAMIC;
                     snprintf(buf, buf_size, "%d%%", global_settings.volume);
+                    *intval = global_settings.volume / 10 + 1;
                     return buf;
 
             }
@@ -752,9 +756,15 @@ static char* get_tag(struct mp3entry* cid3,
                 {
                     int l = battery_level();
                     if (l > -1)
+                    {
                         snprintf(buf, buf_size, "%d%%", l);
+                        *intval = l / 20 + 1;
+                    }
                     else
+                    {
+                        *intval = 6;
                         return "?%";
+                    }
                     return buf;
                 }
 
@@ -857,6 +867,7 @@ static const char* skip_conditional(const char* fmt, int num)
 {
     int level = 1;
     int count = num;
+    const char *last_alternative = NULL;
 
     while (*fmt)
     {
@@ -867,6 +878,7 @@ static const char* skip_conditional(const char* fmt, int num)
 
             case '|':
                 if(1 == level) {
+                    last_alternative = fmt;
                     if(num) {
                         count--;
                         if(count == 0)
@@ -879,10 +891,18 @@ static const char* skip_conditional(const char* fmt, int num)
             case '>':
                 if (0 == --level)
                 {
-                    if (num)
+                    /* We're just skipping to the end */
-                        fmt--;
+                    if(num == 0)
+                        return fmt;
 
-                    return fmt;
+                    /* If we are parsing an enum, we'll return the selected
+                       item. If there weren't enough items in the enum, we'll
+                       return the last one found. */
+                    if(count && last_alternative)
+                    {
+                        return last_alternative;
+                    }
+                    return fmt - 1;
                 }
                 continue;
 
@@ -1069,9 +1089,10 @@ static void format_display(char* buf,
                 if ('<' == *fmt)
                     fmt++;
 
-                /* No value, so skip to else part */
+                /* No value, so skip to else part, using a sufficiently high
+                   value to "hit" the last part of the conditional */
                 if ((!value) || (!strlen(value)))
-                    fmt = skip_conditional(fmt, 1);
+                    fmt = skip_conditional(fmt, 1000);
                 else
                     if(intval > 1) /* enum */
                         fmt = skip_conditional(fmt, intval - 1);

firmware/export/id3.h

@@ -40,6 +40,8 @@ enum {
     AFMT_WAVPACK,      /* WavPack */
 
     /* New formats must be added to the end of this list */
+
+    AFMT_NUM_CODECS
 };
 
 struct mp3entry {