Replace '+' by '∞' for books in CSET_UNICODE and CSET_IBM.

1 files changed, 11 insertions, 3 deletions

diff --git a/crawl-ref/source/viewchar.cc b/crawl-ref/source/viewchar.cc
index 78818642bd..bf0460591c 100644
--- a/crawl-ref/source/viewchar.cc
+++ b/crawl-ref/source/viewchar.cc
@@ -24,27 +24,35 @@ static const unsigned dchar_table[ NUM_CSET ][ NUM_DCHAR_TYPES ] =
         177, 176, 249, 250, '\'', 254, '^', '>', '<',  // wall .. stairs up
         220, 239, 244, 247, '8', '~', '~',             // altar .. item detect
         '0', ')', '[', '/', '%', '?', '=', '!', '(',   // orb .. missile
-        '+', '\\', '}', '%', '$', '"', '#', 234,       // book .. trees
+        236, '\\', '}', '%', '$', '"', '#', 234,       // book .. trees
         ' ', '!', '#', '%', '+', ')', '*', '+',        // space .. fired_burst
         '/', '=', '?', 'X', '[', '`', '#'              // fi_stick .. explosion
     },
 
     // CSET_DEC - remember: 224-255 are mapped to shifted 96-127
+    // It's better known as "vt100 line drawing characters".
     {
         225, 224, 254, ':', '\'', 238, '^', '>', '<',  // wall .. stairs up
         251, 182, 167, 187, '8', 171, 168,             // altar .. item detect
         '0', ')', '[', '/', '%', '?', '=', '!', '(',   // orb .. missile
-        '+', '\\', '}', '%', '$', '"', '#', '7',       // book .. trees
+        ':', '\\', '}', '%', '$', '"', '#', '7',       // book .. trees
         ' ', '!', '#', '%', '+', ')', '*', '+',        // space .. fired_burst
         '/', '=', '?', 'X', '[', '`', '#'              // fi_stick .. explosion
     },
 
     // CSET_UNICODE
+    /* Beware, some popular terminals (PuTTY, xterm) are incapable of coping with
+       the lack of a character in the chosen font, and most popular fonts have a
+       quite limited repertoire.  A subset that is reasonably likely to be present
+       is http://en.wikipedia.org/wiki/WGL4; we could provide a richer alternate
+       set for those on more capable terminals (including for example Thai 0xEB0
+       for clouds), but that would require decoupling encoding from charset.
+    */
     {
         0x2592, 0x2591, 0xB7, 0x25E6, '\'', 0x25FC, '^', '>', '<',
         '_', 0x2229, 0x2320, 0x2248, '8', '~', '~',
         '0', ')', '[', '/', '%', '?', '=', '!', '(',
-        '+', '|', '}', '%', '$', '"', '#', 0x2663,
+        0x221E, '|', '}', '%', '$', '"', '#', 0x2663,
         ' ', '!', '#', '%', '+', ')', '*', '+',        // space .. fired_burst
         '/', '=', '?', 'X', '[', '`', '#'              // fi_stick .. explosion
     },