Fix bug [2874237] monster info display corruption

Examining monsters with ctrl-X can lead to message corruption if the
title and body fields of the describe_info struct used by
process_description take up lines than fit in the message area.

This patch avoid the problem by allowing process_description to print
just the title field if title + body would take up too many lines.

Also make view_desc_proc start one line later since it seemed to be
trying to print the first line it was given one line above where it
should have been.

1 files changed, 21 insertions, 9 deletions

diff --git a/crawl-ref/source/describe.h b/crawl-ref/source/describe.h
index 9e71c2a337..5751678335 100644
--- a/crawl-ref/source/describe.h
+++ b/crawl-ref/source/describe.h
@@ -136,22 +136,34 @@ inline void process_description(T &proc, const describe_info &inf)
 
     std::string desc;
 
-    if (inf.title.empty())
-        desc = inf.body.str();
-    else
-    {
-        desc = inf.title + "$$";
-        desc += inf.body.str();
-    }
-
-    int num_lines = count_desc_lines(desc, line_width) + 1;
+    // How mnay lines is the title, we also seem to be adding 1 to
+    // start with.
+    int num_lines = count_desc_lines(inf.title, line_width) + 1;
 
+    int body_lines   = count_desc_lines(inf.body.str(), line_width);
     const int suffix_lines = count_desc_lines(inf.suffix, line_width);
     const int prefix_lines = count_desc_lines(inf.prefix, line_width);
     const int footer_lines = count_desc_lines(inf.footer, line_width)
                              + (inf.footer.empty() ? 0 : 1);
     const int quote_lines  = count_desc_lines(inf.quote, line_width);
 
+    // Maybe skip the body if body + title would be too many lines
+    if(inf.title.empty())
+    {
+        desc = inf.body.str();
+        // There is a default 1 line addition for some reason
+        num_lines = body_lines + 1;
+    }
+    else if(body_lines + num_lines + 2 <= height)
+    {
+        desc = inf.title + "$$";
+        desc += inf.body.str();
+        // Got 2 lines from the two $s that weren't counted yet
+        num_lines += body_lines + 2;
+    }
+    else
+        desc = inf.title + "$";
+
     // Prefer the footer over the suffix.
     if (num_lines + suffix_lines + footer_lines <= height)
     {